diff --git a/.all-contributorsrc b/.all-contributorsrc deleted file mode 100644 index c15a691..0000000 --- a/.all-contributorsrc +++ /dev/null @@ -1,30 +0,0 @@ -{ - "projectName": "bitcoin-circle-stark", - "projectOwner": "Bitcoin-Wildlife-Sanctuary", - "files": [ - "README.md" - ], - "commitType": "docs", - "commitConvention": "angular", - "contributorsPerLine": 7, - "contributors": [ - { - "login": "victorkstarkware", - "name": "victorkstarkware", - "avatar_url": "https://avatars.githubusercontent.com/u/160594433?v=4", - "profile": "https://github.com/victorkstarkware", - "contributions": [ - "code" - ] - }, - { - "login": "AbdelStark", - "name": "Abdel @ StarkWare ", - "avatar_url": "https://avatars.githubusercontent.com/u/45264458?v=4", - "profile": "http://starknet.io", - "contributions": [ - "maintenance" - ] - } - ] -} diff --git a/.github/workflows/test.yml b/.github/workflows/test.yml deleted file mode 100644 index fde3a83..0000000 --- a/.github/workflows/test.yml +++ /dev/null @@ -1,50 +0,0 @@ -name: Test -on: - push: - branches: - - main - pull_request: - branches: - - main - -env: - RUSTFLAGS: -D warnings - -concurrency: - group: ${{ github.workflow }}-${{ github.head_ref || github.run_id }} - cancel-in-progress: true - -jobs: - test: - runs-on: ubuntu-latest - steps: - - uses: actions/checkout@v3 - - uses: dtolnay/rust-toolchain@nightly - - uses: Swatinem/rust-cache@v2 - - run: cargo test -- --nocapture - - clippy: - runs-on: ubuntu-latest - steps: - - uses: actions/checkout@v3 - - uses: dtolnay/rust-toolchain@nightly - - uses: Swatinem/rust-cache@v2 - - run: cargo clippy --all --all-features --all-targets -- -D warnings - - lint: - runs-on: ubuntu-latest - steps: - - uses: actions/checkout@v3 - - uses: dtolnay/rust-toolchain@nightly - with: - components: rustfmt - - uses: Swatinem/rust-cache@v2 - - run: cargo +nightly fmt --all -- --check - - typos: - runs-on: ubuntu-latest - steps: - - uses: actions/checkout@v3 - - uses: crate-ci/typos@v1.16.23 - with: - files: . diff --git a/.gitignore b/.gitignore deleted file mode 100644 index c683bf1..0000000 --- a/.gitignore +++ /dev/null @@ -1,16 +0,0 @@ -# Generated by Cargo -# will have compiled files and executables -debug/ -target/ - -# Remove Cargo.lock from gitignore if creating an executable, leave it for libraries -# More information here https://doc.rust-lang.org/cargo/guide/cargo-toml-vs-cargo-lock.html -Cargo.lock - -# These are backup files generated by rustfmt -**/*.rs.bk - -# MSVC Windows builds of rustc generate these, which store debugging information -*.pdb - -.idea \ No newline at end of file diff --git a/.nojekyll b/.nojekyll new file mode 100644 index 0000000..f173110 --- /dev/null +++ b/.nojekyll @@ -0,0 +1 @@ +This file makes sure that Github Pages doesn't process mdBook's output. diff --git a/404.html b/404.html new file mode 100644 index 0000000..8ec80ec --- /dev/null +++ b/404.html @@ -0,0 +1,190 @@ + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + +
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"https://github.com/rust-bitcoin/rust-bitcoin" -branch = "bitvm" - -[patch.crates-io.bitcoin_hashes] -git = "https://github.com/rust-bitcoin/rust-bitcoin" -branch = "bitvm" - -[patch.crates-io.bitcoin-internals] -git = "https://github.com/rust-bitcoin/rust-bitcoin" -branch = "bitvm" - -[patch.crates-io.bitcoin-io] -git = "https://github.com/rust-bitcoin/rust-bitcoin" -branch = "bitvm" - -[patch.crates-io.bitcoin-units] -git = "https://github.com/rust-bitcoin/rust-bitcoin" -branch = "bitvm" - -[patch.'https://github.com/BitVM/rust-bitcoin-scriptexec'.bitcoin-scriptexec] -git = "https://github.com/Bitcoin-Wildlife-Sanctuary/rust-bitcoin-scriptexec" \ No newline at end of file diff --git a/FontAwesome/css/font-awesome.css b/FontAwesome/css/font-awesome.css new file mode 100644 index 0000000..540440c --- /dev/null +++ b/FontAwesome/css/font-awesome.css @@ -0,0 +1,4 @@ +/*! + * Font Awesome 4.7.0 by @davegandy - http://fontawesome.io - @fontawesome + * License - 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All rights reserved. + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + diff --git a/FontAwesome/fonts/fontawesome-webfont.ttf b/FontAwesome/fonts/fontawesome-webfont.ttf new file mode 100644 index 0000000..35acda2 Binary files /dev/null and b/FontAwesome/fonts/fontawesome-webfont.ttf differ diff --git a/FontAwesome/fonts/fontawesome-webfont.woff b/FontAwesome/fonts/fontawesome-webfont.woff new file mode 100644 index 0000000..400014a Binary files /dev/null and b/FontAwesome/fonts/fontawesome-webfont.woff differ diff --git a/FontAwesome/fonts/fontawesome-webfont.woff2 b/FontAwesome/fonts/fontawesome-webfont.woff2 new file mode 100644 index 0000000..4d13fc6 Binary files /dev/null and b/FontAwesome/fonts/fontawesome-webfont.woff2 differ diff --git a/LICENSE b/LICENSE deleted file mode 100644 index 28eedd0..0000000 --- a/LICENSE +++ /dev/null @@ -1,21 +0,0 @@ -MIT License - -Copyright (c) 2024 Bitcoin Wildlife Sanctuary - -Permission is hereby granted, free of charge, to any person obtaining a copy -of this software and associated documentation files (the "Software"), to deal -in the Software without restriction, including without limitation the rights -to use, copy, modify, merge, publish, distribute, sublicense, and/or sell -copies of the Software, and to permit persons to whom the Software is -furnished to do so, subject to the following conditions: - -The above copyright notice and this permission notice shall be included in all -copies or substantial portions of the Software. - -THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR -IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, -FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE -AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER -LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, -OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE -SOFTWARE. diff --git a/README.md b/README.md deleted file mode 100644 index 0ebcf05..0000000 --- a/README.md +++ /dev/null @@ -1,232 +0,0 @@ -
- - [![Test Workflow Status](https://github.com/Bitcoin-Wildlife-Sanctuary/bitcoin-circle-stark/actions/workflows/test.yml/badge.svg)](https://github.com/Bitcoin-Wildlife-Sanctuary/bitcoin-circle-stark/actions/workflows/test.yml) - -
- -## Circle STARK Verifier in Bitcoin Script - -This repository includes Bitcoin script implementations of various cryptographic primitives for STARK. - -- **M31, CM31, QM31, Circle Point** - * implementation of add, sub, mul of Mersenne-31 (M31) and its complex extension (CM31) and its degree-4 extension (QM31), - which is imported from [BitVM/rust-bitcoin-m31-or-babybear](https://github.com/BitVM/rust-bitcoin-m31-or-babybear). - * implementation of add, sub, mul of circle points, which are over the circle curve `x^2 + y^2 = 1`. -- **CirclePoint over QM31** - * implementation of double of a circle point over QM31. - * implementation of drawing a random point on the circle over QM31, which is useful for OODS. -- **Fiat-Shamir Transcript** - * aka "channel", which is the name used in Starkware's [stwo](https://github.com/starkware-libs/stwo) library. - * absorbing commitments and QM31 elements through `OP_CAT + OP_SHA256`. - * squeezing random elements for Fiat-Shamir transform using hints and `OP_CAT + OP_SHA256`. -- **Proof-of-Work Check** - * calculating a proof-of-work nonce for the "channel", based on specified security bits. - * verifying the proof-of-work nonce and computing the new "channel" state. -- **Merkle Tree** - * implementation of Merkle path verification using hints and `OP_CAT + OP_SHA256`. - -The next step is to implement the FRI protocol, which reasons about the degree of a quotient polynomial. - ---- - -### Performance - -These performance numbers are obtained from `cargo test -- --nocapture` over commit [6e5c211](https://github.com/Bitcoin-Wildlife-Sanctuary/bitcoin-circle-stark/commit/6e5c211fb755428ab3492eac2e0dcd39c99482d6). - -- **M31, CM31, QM31, CirclePoint** - * M31.add() = 18 bytes, QM31.add() = 84 bytes - * M31.sub() = 12 bytes, QM31.sub() = 63 bytes - * M31.mul() = 1415 bytes, QM31.mul() = 13321 bytes - * M31.mul_by_constant() = ~744 bytes, QM31.mul_by_m31_constant() = ~2981 bytes - * QM31.mul_by_m31() = 4702 bytes - * M31.commit() = 1 bytes, CM31.commit() = 3 bytes, QM31.commit() = 7 bytes - * M31.from_hash() = 64 bytes, CM31.from_hash() = 124 bytes, QM31.from_hash() = 250 bytes, 5M31.from_hash() = 312 bytes - * CirclePoint.add() = 4345 bytes, CirclePoint.double() = 4346 bytes, CirclePoint.sub() = 4352 bytes -- **CirclePoint over QM31** - * CirclePointSecure.double_x() = 13505 bytes - * CirclePointSecure.get_random_point() = 40546 bytes -- **Fiat-Shamir Transcript** - * Channel.absorb_commitment = 2 bytes - * Channel.absorb_qm31() = 9 bytes - * Channel.squeeze_element_using_hint() = 257 bytes (require 5 hint elements) - * Channel.squeeze_5queries_using_hint() = 1222 bytes (require 6 hint elements) -- **Proof-of-Work Check** - * POW.verify_pow(1 bits) = 39 bytes - * POW.verify_pow(2 bits) = 38 bytes - * POW.verify_pow(3 bits) = 38 bytes - * POW.verify_pow(4 bits) = 37 bytes - * POW.verify_pow(5 bits) = 37 bytes - * POW.verify_pow(6 bits) = 37 bytes - * POW.verify_pow(7 bits) = 37 bytes - * POW.verify_pow(8 bits) = 21 bytes - * POW.verify_pow(9 bits) = 42 bytes - * POW.verify_pow(10 bits) = 41 bytes - * POW.verify_pow(11 bits) = 41 bytes - * POW.verify_pow(12 bits) = 40 bytes - * POW.verify_pow(13 bits) = 40 bytes - * POW.verify_pow(14 bits) = 40 bytes - * POW.verify_pow(15 bits) = 40 bytes - * POW.verify_pow(16 bits) = 22 bytes - * POW.verify_pow(17 bits) = 43 bytes - * POW.verify_pow(18 bits) = 42 bytes - * POW.verify_pow(19 bits) = 42 bytes - * POW.verify_pow(20 bits) = 41 bytes -- **Merkle tree** - * MT.verify(2^12) = 263 bytes (require 11 hint elements) - * MT.verify(2^14) = 309 bytes (require 13 hint elements) - * MT.verify(2^16) = 356 bytes (require 15 hint elements) - * MT.verify(2^18) = 404 bytes (require 18 hint elements) - * MT.verify(2^20) = 452 bytes (require 20 hint elements) - ---- - -### Channel - -The channel is used for Fiat-Shamir transform. It absorbs elements that are either prior knowledge of the verifier or provers' -messages, and it can be squeezed to produce pseudorandom elements. There are five operations. - -- `new(IV) -> channel`: initialize a new channel using an initialization vector (IV) - * `channel := IV` -- `absorb(channel, commitment) -> channel'`: update the channel with a commitment - * `channel' := SHA256(channel || commitment)` -- `absorb(channel, qm31) -> channel'`: update the channel with a QM31 element - * `channel' := SHA256(channel || commit(qm31))` -- `squeeze(channel) -> (qm31, channel')`: squeeze a QM31 element out of the channel - * `hash := SHA256(channel || 0x00)` - * `channel' := SHA256(channel)` - * `qm31 := extract(hash)` -- `squeeze(channel, logn) -> (q1, q2, q3, q4, q5, channel')`: squeeze five positions on a list of 2^logn elements - * `hash := SHA256(channel || 0x00)` - * `channel' := SHA256(channel)` - * `q1, q2, q3, q4, q5 := extract(hash, logn)` - -The constructions of commit and extract are discussed later. - ---- - -### Commit - -With `OP_CAT + OP_SHA256`, we can commit M31, CM31, and QM31 elements with a few bytes. - -M31 requires only 1 byte: `commit(m31) := SHA256(m31)`. -``` -OP_SHA256 -``` - -CM31 requires 3 bytes: `commit(cm31) := SHA256(cm31.0 || SHA256(cm31.1)) ` -``` -OP_SHA256 OP_CAT OP_SHA256 -``` - -QM31 requires 7 bytes: `commit(qm31) := SHA256(qm31.0.0 || SHA256(qm31.0.1 || SHA256(qm31.1.0 || SHA256(qm31.1.1))))` -``` -OP_SHA256 OP_CAT OP_SHA256 OP_CAT OP_SHA256 OP_CAT OP_SHA256 -``` - -We feel that this is the optimal. - ---- - -### Extract - -Since we do not have `OP_SUBSTR`, to extract a QM31 element or five positions from the hash, we need to use hints. The -idea is to peel off the first few bytes of the hash and recreate a normalized QM31 element out of it. If we want to extract -positions, the numbers are further adjusted to have only `logn` bits. - -- For QM31, the hint includes five elements: - * `hash[0..4]` in the minimal number encoding form - * `hash[4..8]` in the minimal number encoding form - * `hash[8..12]` in the minimal number encoding form - * `hash[12..16]` in the minimal number encoding form - * `hash[16..32]` as bytes, which is the tail -- For five positions, the hint includes six elements: - * `hash[0..4]` in the minimal number encoding form - * `hash[4..8]` in the minimal number encoding form - * `hash[8..12]` in the minimal number encoding form - * `hash[12..16]` in the minimal number encoding form - * `hash[16..20]` in the minimal number encoding form - * `hash[20..32]` as bytes, which is the tail - -Due to the minimal number encoding form, the hint element, which represents a signed 32-bit integer, does not necessarily -have four bytes. Our solution is to use `OP_SIZE` to detect its length and then use `OP_CAT` to pad it to four bytes. -A subtlety here is that negative numbers, which occur when the original hash's last byte's most significant bit is 1, -need to be handled differently, as it would first be padded with `OP_LEFT (0x80)` and then `OP_PUSHBYTES_0 (0x00)`. - -``` -OP_IF -OP_PUSHBYTES_1 OP_PUSHBYTES_0 -OP_ELSE -OP_PUSHBYTES_1 OP_LEFT -OP_ENDIF -``` - -Note that `OP_PUSHBYTES_0` and `OP_LEFT` here are not opcodes but rather data that `OP_PUSHBYTES_1` will push to the stack. -One cannot directly write `0x00` and `0x80` in the interpreter, as they would become an empty string and `0x80 0x00`, -respectively. - -It first uses `OP_CAT` to combine the hint elements together and compare it with the hash that is to be extracted from. - -Each of the hint number, after peeling off the sign bit, becomes a non-negative 31-bit number, ranging from 0 to 2^31 - 1. -However, in the rest of the computation, we want the number to be below 2^31 - 1. This is done by subtracting one from the -resulting number unless the resulting number is zero. -``` -OP_DUP OP_NOT -OP_NOTIF OP_1SUB OP_ENDIF -``` - -After such adjustment, one obtains an element. - ---- - -### Proof of Work - -The Proof-of-Work check accepts two inputs: `channel` and `nonce`, and checks whether the new channel state `channel'=sha256(channel||nonce)` has sufficiently many security bits, namely, `n_bits`. - -Since we don't have `OP_SUBSTR`, the check also requires hints that change depending on whether `n_bis` is divisible by 8 or not. - -If `n_bits % 8==0`, there is a single hint `suffix`, and the script checks that -``` -0^(n_bits//8)||suffix==channel' -``` - -If `n_bits % 8!=0`, together with `suffix`, there is an additional byte-sized hint `msb`. Consequently, the script checks that -``` -0^(n_bits//8)||msb||suffix==channel' -``` -and also that `msb` starts with `n_bits % 8` (which would be at least 1) zero bits. - - ---- - -### License and contributors - -This repository is intended to be public good. It is under the MIT license. - -A portion of the code is contributed by [L2 Iterative (L2IV)](https://www.l2iterative.com/), a crypto -VC based in San Francisco and Hong Kong. The work receives support from Starkware, who is a limited partner in L2IV. For -disclosure, L2IV has also invested into numerous companies active in the Bitcoin ecosystem, but this work is open-source -and nonprofit, and is not intended for competition. The code is not investment advice. - -Starkware contribtues a portion of the code, including the original Rust FRI implementation (from stwo) and some Bitcoin scripts. - -There are also community members contributing to the code and contributing to the ideas. Bitcoin Wildlife Sanctuary is a -public-good project supported by many people. - -Below we reiterate the contributors to this repository. - - - - - - - - - - - -
victorkstarkware
victorkstarkware
💻		Abdel @ StarkWare
Abdel @ StarkWare
🚧
- - - - - diff --git a/ayu-highlight.css b/ayu-highlight.css new file mode 100644 index 0000000..0c45c6f --- /dev/null +++ b/ayu-highlight.css @@ -0,0 +1,79 @@ +/* +Based off of the Ayu theme +Original by Dempfi (https://github.com/dempfi/ayu) +*/ + +.hljs { + display: block; + overflow-x: auto; + background: #191f26; + color: #e6e1cf; + padding: 0.5em; +} + +.hljs-comment, +.hljs-quote { + color: #5c6773; + font-style: italic; +} + +.hljs-variable, +.hljs-template-variable, +.hljs-attribute, +.hljs-attr, +.hljs-regexp, +.hljs-link, +.hljs-selector-id, +.hljs-selector-class { + color: #ff7733; +} + +.hljs-number, +.hljs-meta, +.hljs-builtin-name, +.hljs-literal, +.hljs-type, +.hljs-params { + color: #ffee99; +} + +.hljs-string, +.hljs-bullet { + color: #b8cc52; +} + +.hljs-title, +.hljs-built_in, +.hljs-section { + color: #ffb454; +} + +.hljs-keyword, +.hljs-selector-tag, +.hljs-symbol { + color: #ff7733; +} + +.hljs-name { + color: #36a3d9; +} + +.hljs-tag { + color: #00568d; +} + +.hljs-emphasis { + font-style: italic; +} + +.hljs-strong { + font-weight: bold; +} + +.hljs-addition { + color: #91b362; +} + +.hljs-deletion { + color: #d96c75; +} diff --git a/book.js b/book.js new file mode 100644 index 0000000..5e38636 --- /dev/null +++ b/book.js @@ -0,0 +1,660 @@ +"use strict"; + +// Fix back button cache problem +window.onunload = function () { }; + +// Global variable, shared between modules +function playground_text(playground) { + let code_block = playground.querySelector("code"); + + if (window.ace && code_block.classList.contains("editable")) { + let editor = window.ace.edit(code_block); + return editor.getValue(); + } else { + return code_block.textContent; + } +} + +(function codeSnippets() { + function fetch_with_timeout(url, options, timeout = 6000) { + return Promise.race([ + fetch(url, options), + new Promise((_, reject) => setTimeout(() => reject(new Error('timeout')), timeout)) + ]); + } + + var playgrounds = Array.from(document.querySelectorAll(".playground")); + if (playgrounds.length > 0) { + fetch_with_timeout("https://play.rust-lang.org/meta/crates", { + headers: { + 'Content-Type': "application/json", + }, + method: 'POST', + mode: 'cors', + }) + .then(response => response.json()) + .then(response => { + // get list of crates available in the rust playground + let playground_crates = response.crates.map(item => item["id"]); + playgrounds.forEach(block => handle_crate_list_update(block, playground_crates)); + }); + } + + function handle_crate_list_update(playground_block, playground_crates) { + // update the play buttons after receiving the response + update_play_button(playground_block, playground_crates); + + // and install on change listener to dynamically update ACE editors + if (window.ace) { + let code_block = playground_block.querySelector("code"); + if (code_block.classList.contains("editable")) { + let editor = window.ace.edit(code_block); + editor.addEventListener("change", function (e) { + update_play_button(playground_block, playground_crates); + }); + // add Ctrl-Enter command to execute rust code + editor.commands.addCommand({ + name: "run", + bindKey: { + win: "Ctrl-Enter", + mac: "Ctrl-Enter" + }, + exec: _editor => run_rust_code(playground_block) + }); + } + } + } + + // updates the visibility of play button based on `no_run` class and + // used crates vs ones available on http://play.rust-lang.org + function update_play_button(pre_block, playground_crates) { + var play_button = pre_block.querySelector(".play-button"); + + // skip if code is `no_run` + if (pre_block.querySelector('code').classList.contains("no_run")) { + play_button.classList.add("hidden"); + return; + } + + // get list of `extern crate`'s from snippet + var txt = playground_text(pre_block); + var re = /extern\s+crate\s+([a-zA-Z_0-9]+)\s*;/g; + var snippet_crates = []; + var item; + while (item = re.exec(txt)) { + snippet_crates.push(item[1]); + } + + // check if all used crates are available on play.rust-lang.org + var all_available = snippet_crates.every(function (elem) { + return playground_crates.indexOf(elem) > -1; + }); + + if (all_available) { + play_button.classList.remove("hidden"); + } else { + play_button.classList.add("hidden"); + } + } + + function run_rust_code(code_block) { + var result_block = code_block.querySelector(".result"); + if (!result_block) { + result_block = document.createElement('code'); + result_block.className = 'result hljs language-bash'; + + code_block.append(result_block); + } + + let text = playground_text(code_block); + let classes = code_block.querySelector('code').classList; + let has_2018 = classes.contains("edition2018"); + let edition = has_2018 ? "2018" : "2015"; + + var params = { + version: "stable", + optimize: "0", + code: text, + edition: edition + }; + + if (text.indexOf("#![feature") !== -1) { + params.version = "nightly"; + } + + result_block.innerText = "Running..."; + + fetch_with_timeout("https://play.rust-lang.org/evaluate.json", { + headers: { + 'Content-Type': "application/json", + }, + method: 'POST', + mode: 'cors', + body: JSON.stringify(params) + }) + .then(response => response.json()) + .then(response => result_block.innerText = response.result) + .catch(error => result_block.innerText = "Playground Communication: " + error.message); + } + + // Syntax highlighting Configuration + hljs.configure({ + tabReplace: ' ', // 4 spaces + languages: [], // Languages used for auto-detection + }); + + let code_nodes = Array + .from(document.querySelectorAll('code')) + // Don't highlight `inline code` blocks in headers. + .filter(function (node) {return !node.parentElement.classList.contains("header"); }); + + if (window.ace) { + // language-rust class needs to be removed for editable + // blocks or highlightjs will capture events + Array + .from(document.querySelectorAll('code.editable')) + .forEach(function (block) { block.classList.remove('language-rust'); }); + + Array + .from(document.querySelectorAll('code:not(.editable)')) + .forEach(function (block) { hljs.highlightBlock(block); }); + } else { + code_nodes.forEach(function (block) { hljs.highlightBlock(block); }); + } + + // Adding the hljs class gives code blocks the color css + // even if highlighting doesn't apply + code_nodes.forEach(function (block) { block.classList.add('hljs'); }); + + Array.from(document.querySelectorAll("code.language-rust")).forEach(function (block) { + + var lines = Array.from(block.querySelectorAll('.boring')); + // If no lines were hidden, return + if (!lines.length) { return; } + block.classList.add("hide-boring"); + + var buttons = document.createElement('div'); + buttons.className = 'buttons'; + buttons.innerHTML = ""; + + // add expand button + var pre_block = block.parentNode; + pre_block.insertBefore(buttons, pre_block.firstChild); + + pre_block.querySelector('.buttons').addEventListener('click', function (e) { + if (e.target.classList.contains('fa-eye')) { + e.target.classList.remove('fa-eye'); + e.target.classList.add('fa-eye-slash'); + e.target.title = 'Hide lines'; + e.target.setAttribute('aria-label', e.target.title); + + block.classList.remove('hide-boring'); + } else if (e.target.classList.contains('fa-eye-slash')) { + e.target.classList.remove('fa-eye-slash'); + e.target.classList.add('fa-eye'); + e.target.title = 'Show hidden lines'; + e.target.setAttribute('aria-label', e.target.title); + + block.classList.add('hide-boring'); + } + }); + }); + + if (window.playground_copyable) { + Array.from(document.querySelectorAll('pre code')).forEach(function (block) { + var pre_block = block.parentNode; + if (!pre_block.classList.contains('playground')) { + var buttons = pre_block.querySelector(".buttons"); + if (!buttons) { + buttons = document.createElement('div'); + buttons.className = 'buttons'; + pre_block.insertBefore(buttons, pre_block.firstChild); + } + + var clipButton = document.createElement('button'); + clipButton.className = 'fa fa-copy clip-button'; + clipButton.title = 'Copy to clipboard'; + clipButton.setAttribute('aria-label', clipButton.title); + clipButton.innerHTML = ''; + + buttons.insertBefore(clipButton, buttons.firstChild); + } + }); + } + + // Process playground code blocks + Array.from(document.querySelectorAll(".playground")).forEach(function (pre_block) { + // Add play button + var buttons = pre_block.querySelector(".buttons"); + if (!buttons) { + buttons = document.createElement('div'); + buttons.className = 'buttons'; + pre_block.insertBefore(buttons, pre_block.firstChild); + } + + var runCodeButton = document.createElement('button'); + runCodeButton.className = 'fa fa-play play-button'; + runCodeButton.hidden = true; + runCodeButton.title = 'Run this code'; + runCodeButton.setAttribute('aria-label', runCodeButton.title); + + buttons.insertBefore(runCodeButton, buttons.firstChild); + runCodeButton.addEventListener('click', function (e) { + run_rust_code(pre_block); + }); + + if (window.playground_copyable) { + var copyCodeClipboardButton = document.createElement('button'); + copyCodeClipboardButton.className = 'fa fa-copy clip-button'; + copyCodeClipboardButton.innerHTML = ''; + copyCodeClipboardButton.title = 'Copy to clipboard'; + copyCodeClipboardButton.setAttribute('aria-label', copyCodeClipboardButton.title); + + buttons.insertBefore(copyCodeClipboardButton, buttons.firstChild); + } + + let code_block = pre_block.querySelector("code"); + if (window.ace && code_block.classList.contains("editable")) { + var undoChangesButton = document.createElement('button'); + undoChangesButton.className = 'fa fa-history reset-button'; + undoChangesButton.title = 'Undo changes'; + undoChangesButton.setAttribute('aria-label', undoChangesButton.title); + + buttons.insertBefore(undoChangesButton, buttons.firstChild); + + undoChangesButton.addEventListener('click', function () { + let editor = window.ace.edit(code_block); + editor.setValue(editor.originalCode); + editor.clearSelection(); + }); + } + }); +})(); + +(function themes() { + var html = document.querySelector('html'); + var themeToggleButton = document.getElementById('theme-toggle'); + var themePopup = document.getElementById('theme-list'); + var themeColorMetaTag = document.querySelector('meta[name="theme-color"]'); + var stylesheets = { + ayuHighlight: document.querySelector("[href$='ayu-highlight.css']"), + tomorrowNight: document.querySelector("[href$='tomorrow-night.css']"), + highlight: document.querySelector("[href$='highlight.css']"), + }; + + function showThemes() { + themePopup.style.display = 'block'; + themeToggleButton.setAttribute('aria-expanded', true); + themePopup.querySelector("button#" + get_theme()).focus(); + } + + function hideThemes() { + themePopup.style.display = 'none'; + themeToggleButton.setAttribute('aria-expanded', false); + themeToggleButton.focus(); + } + + function get_theme() { + var theme; + try { theme = localStorage.getItem('mdbook-theme'); } catch (e) { } + if (theme === null || theme === undefined) { + return default_theme; + } else { + return theme; + } + } + + function set_theme(theme, store = true) { + let ace_theme; + + if (theme == 'coal' || theme == 'navy') { + stylesheets.ayuHighlight.disabled = true; + stylesheets.tomorrowNight.disabled = false; + stylesheets.highlight.disabled = true; + + ace_theme = "ace/theme/tomorrow_night"; + } else if (theme == 'ayu') { + stylesheets.ayuHighlight.disabled = false; + stylesheets.tomorrowNight.disabled = true; + stylesheets.highlight.disabled = true; + ace_theme = "ace/theme/tomorrow_night"; + } else { + stylesheets.ayuHighlight.disabled = true; + stylesheets.tomorrowNight.disabled = true; + stylesheets.highlight.disabled = false; + ace_theme = "ace/theme/dawn"; + } + + setTimeout(function () { + themeColorMetaTag.content = getComputedStyle(document.body).backgroundColor; + }, 1); + + if (window.ace && window.editors) { + window.editors.forEach(function (editor) { + editor.setTheme(ace_theme); + }); + } + + var previousTheme = get_theme(); + + if (store) { + try { localStorage.setItem('mdbook-theme', theme); } catch (e) { } + } + + html.classList.remove(previousTheme); + html.classList.add(theme); + } + + // Set theme + var theme = get_theme(); + + set_theme(theme, false); + + themeToggleButton.addEventListener('click', function () { + if (themePopup.style.display === 'block') { + hideThemes(); + } else { + showThemes(); + } + }); + + themePopup.addEventListener('click', function (e) { + var theme = e.target.id || e.target.parentElement.id; + set_theme(theme); + }); + + themePopup.addEventListener('focusout', function(e) { + // e.relatedTarget is null in Safari and Firefox on macOS (see workaround below) + if (!!e.relatedTarget && !themeToggleButton.contains(e.relatedTarget) && !themePopup.contains(e.relatedTarget)) { + hideThemes(); + } + }); + + // Should not be needed, but it works around an issue on macOS & iOS: https://github.com/rust-lang/mdBook/issues/628 + document.addEventListener('click', function(e) { + if (themePopup.style.display === 'block' && !themeToggleButton.contains(e.target) && !themePopup.contains(e.target)) { + hideThemes(); + } + }); + + document.addEventListener('keydown', function (e) { + if (e.altKey || e.ctrlKey || e.metaKey || e.shiftKey) { return; } + if (!themePopup.contains(e.target)) { return; } + + switch (e.key) { + case 'Escape': + e.preventDefault(); + hideThemes(); + break; + case 'ArrowUp': + e.preventDefault(); + var li = document.activeElement.parentElement; + if (li && li.previousElementSibling) { + li.previousElementSibling.querySelector('button').focus(); + } + break; + case 'ArrowDown': + e.preventDefault(); + var li = document.activeElement.parentElement; + if (li && li.nextElementSibling) { + li.nextElementSibling.querySelector('button').focus(); + } + break; + case 'Home': + e.preventDefault(); + themePopup.querySelector('li:first-child button').focus(); + break; + case 'End': + e.preventDefault(); + themePopup.querySelector('li:last-child button').focus(); + break; + } + }); +})(); + +(function sidebar() { + var html = document.querySelector("html"); + var sidebar = document.getElementById("sidebar"); + var sidebarLinks = document.querySelectorAll('#sidebar a'); + var sidebarToggleButton = document.getElementById("sidebar-toggle"); + var sidebarResizeHandle = document.getElementById("sidebar-resize-handle"); + var firstContact = null; + + function showSidebar() { + html.classList.remove('sidebar-hidden') + html.classList.add('sidebar-visible'); + Array.from(sidebarLinks).forEach(function (link) { + link.setAttribute('tabIndex', 0); + }); + sidebarToggleButton.setAttribute('aria-expanded', true); + sidebar.setAttribute('aria-hidden', false); + try { localStorage.setItem('mdbook-sidebar', 'visible'); } catch (e) { } + } + + + var sidebarAnchorToggles = document.querySelectorAll('#sidebar a.toggle'); + + function toggleSection(ev) { + ev.currentTarget.parentElement.classList.toggle('expanded'); + } + + Array.from(sidebarAnchorToggles).forEach(function (el) { + el.addEventListener('click', toggleSection); + }); + + function hideSidebar() { + html.classList.remove('sidebar-visible') + html.classList.add('sidebar-hidden'); + Array.from(sidebarLinks).forEach(function (link) { + link.setAttribute('tabIndex', -1); + }); + sidebarToggleButton.setAttribute('aria-expanded', false); + sidebar.setAttribute('aria-hidden', true); + try { localStorage.setItem('mdbook-sidebar', 'hidden'); } catch (e) { } + } + + // Toggle sidebar + sidebarToggleButton.addEventListener('click', function sidebarToggle() { + if (html.classList.contains("sidebar-hidden")) { + var current_width = parseInt( + document.documentElement.style.getPropertyValue('--sidebar-width'), 10); + if (current_width < 150) { + document.documentElement.style.setProperty('--sidebar-width', '150px'); + } + showSidebar(); + } else if (html.classList.contains("sidebar-visible")) { + hideSidebar(); + } else { + if (getComputedStyle(sidebar)['transform'] === 'none') { + hideSidebar(); + } else { + showSidebar(); + } + } + }); + + sidebarResizeHandle.addEventListener('mousedown', initResize, false); + + function initResize(e) { + window.addEventListener('mousemove', resize, false); + window.addEventListener('mouseup', stopResize, false); + html.classList.add('sidebar-resizing'); + } + function resize(e) { + var pos = (e.clientX - sidebar.offsetLeft); + if (pos < 20) { + hideSidebar(); + } else { + if (html.classList.contains("sidebar-hidden")) { + showSidebar(); + } + pos = Math.min(pos, window.innerWidth - 100); + document.documentElement.style.setProperty('--sidebar-width', pos + 'px'); + } + } + //on mouseup remove windows functions mousemove & mouseup + function stopResize(e) { + html.classList.remove('sidebar-resizing'); + window.removeEventListener('mousemove', resize, false); + window.removeEventListener('mouseup', stopResize, false); + } + + document.addEventListener('touchstart', function (e) { + firstContact = { + x: e.touches[0].clientX, + time: Date.now() + }; + }, { passive: true }); + + document.addEventListener('touchmove', function (e) { + if (!firstContact) + return; + + var curX = e.touches[0].clientX; + var xDiff = curX - firstContact.x, + tDiff = Date.now() - firstContact.time; + + if (tDiff < 250 && Math.abs(xDiff) >= 150) { + if (xDiff >= 0 && firstContact.x < Math.min(document.body.clientWidth * 0.25, 300)) + showSidebar(); + else if (xDiff < 0 && curX < 300) + hideSidebar(); + + firstContact = null; + } + }, { passive: true }); + + // Scroll sidebar to current active section + var activeSection = document.getElementById("sidebar").querySelector(".active"); + if (activeSection) { + // https://developer.mozilla.org/en-US/docs/Web/API/Element/scrollIntoView + activeSection.scrollIntoView({ block: 'center' }); + } +})(); + +(function chapterNavigation() { + document.addEventListener('keydown', function (e) { + if (e.altKey || e.ctrlKey || e.metaKey || e.shiftKey) { return; } + if (window.search && window.search.hasFocus()) { return; } + + switch (e.key) { + case 'ArrowRight': + e.preventDefault(); + var nextButton = document.querySelector('.nav-chapters.next'); + if (nextButton) { + window.location.href = nextButton.href; + } + break; + case 'ArrowLeft': + e.preventDefault(); + var previousButton = document.querySelector('.nav-chapters.previous'); + if (previousButton) { + window.location.href = previousButton.href; + } + break; + } + }); +})(); + +(function clipboard() { + var clipButtons = document.querySelectorAll('.clip-button'); + + function hideTooltip(elem) { + elem.firstChild.innerText = ""; + elem.className = 'fa fa-copy clip-button'; + } + + function showTooltip(elem, msg) { + elem.firstChild.innerText = msg; + elem.className = 'fa fa-copy tooltipped'; + } + + var clipboardSnippets = new ClipboardJS('.clip-button', { + text: function (trigger) { + hideTooltip(trigger); + let playground = trigger.closest("pre"); + return playground_text(playground); + } + }); + + Array.from(clipButtons).forEach(function (clipButton) { + clipButton.addEventListener('mouseout', function (e) { + hideTooltip(e.currentTarget); + }); + }); + + clipboardSnippets.on('success', function (e) { + e.clearSelection(); + showTooltip(e.trigger, "Copied!"); + }); + + clipboardSnippets.on('error', function (e) { + showTooltip(e.trigger, "Clipboard error!"); + }); +})(); + +(function scrollToTop () { + var menuTitle = document.querySelector('.menu-title'); + + menuTitle.addEventListener('click', function () { + document.scrollingElement.scrollTo({ top: 0, behavior: 'smooth' }); + }); +})(); + +(function controllMenu() { + var menu = document.getElementById('menu-bar'); + + (function controllPosition() { + var scrollTop = document.scrollingElement.scrollTop; + var prevScrollTop = scrollTop; + var minMenuY = -menu.clientHeight - 50; + // When the script loads, the page can be at any scroll (e.g. if you reforesh it). + menu.style.top = scrollTop + 'px'; + // Same as parseInt(menu.style.top.slice(0, -2), but faster + var topCache = menu.style.top.slice(0, -2); + menu.classList.remove('sticky'); + var stickyCache = false; // Same as menu.classList.contains('sticky'), but faster + document.addEventListener('scroll', function () { + scrollTop = Math.max(document.scrollingElement.scrollTop, 0); + // `null` means that it doesn't need to be updated + var nextSticky = null; + var nextTop = null; + var scrollDown = scrollTop > prevScrollTop; + var menuPosAbsoluteY = topCache - scrollTop; + if (scrollDown) { + nextSticky = false; + if (menuPosAbsoluteY > 0) { + nextTop = prevScrollTop; + } + } else { + if (menuPosAbsoluteY > 0) { + nextSticky = true; + } else if (menuPosAbsoluteY < minMenuY) { + nextTop = prevScrollTop + minMenuY; + } + } + if (nextSticky === true && stickyCache === false) { + menu.classList.add('sticky'); + stickyCache = true; + } else if (nextSticky === false && stickyCache === true) { + menu.classList.remove('sticky'); + stickyCache = false; + } + if (nextTop !== null) { + menu.style.top = nextTop + 'px'; + topCache = nextTop; + } + prevScrollTop = scrollTop; + }, { passive: true }); + })(); + (function controllBorder() { + menu.classList.remove('bordered'); + document.addEventListener('scroll', function () { + if (menu.offsetTop === 0) { + menu.classList.remove('bordered'); + } else { + menu.classList.add('bordered'); + } + }, { passive: true }); 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+} + +/* Menu Bar */ + +#menu-bar, +#menu-bar-hover-placeholder { + z-index: 101; + margin: auto calc(0px - var(--page-padding)); +} +#menu-bar { + position: relative; + display: flex; + flex-wrap: wrap; + background-color: var(--bg); + border-bottom-color: var(--bg); + border-bottom-width: 1px; + border-bottom-style: solid; +} +#menu-bar.sticky, +.js #menu-bar-hover-placeholder:hover + #menu-bar, +.js #menu-bar:hover, +.js.sidebar-visible #menu-bar { + position: -webkit-sticky; + position: sticky; + top: 0 !important; +} +#menu-bar-hover-placeholder { + position: sticky; + position: -webkit-sticky; + top: 0; + height: var(--menu-bar-height); +} +#menu-bar.bordered { + border-bottom-color: var(--table-border-color); +} +#menu-bar i, #menu-bar .icon-button { + position: relative; + padding: 0 8px; + z-index: 10; + line-height: var(--menu-bar-height); + cursor: pointer; + transition: color 0.5s; +} +@media only screen and (max-width: 420px) { + #menu-bar i, #menu-bar .icon-button { + padding: 0 5px; + } +} + +.icon-button { + border: none; + background: none; + padding: 0; + color: inherit; +} +.icon-button i { + margin: 0; +} + +.right-buttons { + margin: 0 15px; +} +.right-buttons a { + text-decoration: none; +} + +.left-buttons { + display: flex; + margin: 0 5px; +} +.no-js .left-buttons { + display: none; +} + +.menu-title { + display: inline-block; + font-weight: 200; + font-size: 2.4rem; + line-height: var(--menu-bar-height); + text-align: center; + margin: 0; + flex: 1; + white-space: nowrap; + overflow: hidden; + text-overflow: ellipsis; +} +.js .menu-title { + cursor: pointer; +} + +.menu-bar, +.menu-bar:visited, +.nav-chapters, +.nav-chapters:visited, +.mobile-nav-chapters, +.mobile-nav-chapters:visited, +.menu-bar .icon-button, +.menu-bar a i { + color: var(--icons); +} + +.menu-bar i:hover, +.menu-bar .icon-button:hover, +.nav-chapters:hover, +.mobile-nav-chapters i:hover { + color: var(--icons-hover); +} + +/* Nav Icons */ + +.nav-chapters { + font-size: 2.5em; + text-align: center; + text-decoration: none; + + position: fixed; + top: 0; + bottom: 0; + margin: 0; + max-width: 150px; + min-width: 90px; + + display: flex; + justify-content: center; + align-content: center; + flex-direction: column; + + transition: color 0.5s, background-color 0.5s; +} + +.nav-chapters:hover { + text-decoration: none; + background-color: var(--theme-hover); + transition: background-color 0.15s, color 0.15s; +} + +.nav-wrapper { + margin-top: 50px; + display: none; +} + +.mobile-nav-chapters { + font-size: 2.5em; + text-align: center; + text-decoration: none; + width: 90px; + border-radius: 5px; + background-color: var(--sidebar-bg); +} + +.previous { + float: left; +} + +.next { + float: right; + right: var(--page-padding); +} + +@media only screen and (max-width: 1080px) { + .nav-wide-wrapper { display: none; } + .nav-wrapper { display: block; } +} + +@media only screen and (max-width: 1380px) { + .sidebar-visible .nav-wide-wrapper { display: none; } + .sidebar-visible .nav-wrapper { display: block; } +} + +/* Inline code */ + +:not(pre) > .hljs { + display: inline; + padding: 0.1em 0.3em; + border-radius: 3px; +} + +:not(pre):not(a) > .hljs { + color: var(--inline-code-color); + overflow-x: initial; +} + +a:hover > .hljs { + text-decoration: underline; +} + +pre { + position: relative; +} +pre > .buttons { + position: absolute; + z-index: 100; + right: 5px; + top: 5px; + + color: var(--sidebar-fg); + cursor: pointer; +} +pre > .buttons :hover { + color: var(--sidebar-active); +} +pre > .buttons i { + margin-left: 8px; +} +pre > .buttons button { + color: inherit; + background: transparent; + border: none; + cursor: inherit; +} +pre > .result { + margin-top: 10px; +} + +/* Search */ + +#searchresults a { + text-decoration: none; +} + +mark { + border-radius: 2px; + padding: 0 3px 1px 3px; + margin: 0 -3px -1px -3px; + background-color: var(--search-mark-bg); + transition: background-color 300ms linear; + cursor: pointer; +} + +mark.fade-out { + background-color: rgba(0,0,0,0) !important; + cursor: auto; +} + +.searchbar-outer { + margin-left: auto; + margin-right: auto; + max-width: var(--content-max-width); +} + +#searchbar { + width: 100%; + margin: 5px auto 0px auto; + padding: 10px 16px; + transition: box-shadow 300ms ease-in-out; + border: 1px solid var(--searchbar-border-color); + border-radius: 3px; + background-color: var(--searchbar-bg); + color: var(--searchbar-fg); +} +#searchbar:focus, +#searchbar.active { + box-shadow: 0 0 3px var(--searchbar-shadow-color); +} + +.searchresults-header { + font-weight: bold; + font-size: 1em; + padding: 18px 0 0 5px; + color: var(--searchresults-header-fg); +} + +.searchresults-outer { + margin-left: auto; + margin-right: auto; + max-width: var(--content-max-width); + border-bottom: 1px dashed var(--searchresults-border-color); +} + +ul#searchresults { + list-style: none; + padding-left: 20px; +} +ul#searchresults li { + margin: 10px 0px; + padding: 2px; + border-radius: 2px; +} +ul#searchresults li.focus { + background-color: var(--searchresults-li-bg); +} +ul#searchresults span.teaser { + display: block; + clear: both; + margin: 5px 0 0 20px; + font-size: 0.8em; +} +ul#searchresults span.teaser em { + font-weight: bold; + font-style: normal; +} + +/* Sidebar */ + +.sidebar { + position: fixed; + left: 0; + top: 0; + bottom: 0; + width: var(--sidebar-width); + font-size: 0.875em; + box-sizing: border-box; + -webkit-overflow-scrolling: touch; + overscroll-behavior-y: contain; + background-color: var(--sidebar-bg); + color: var(--sidebar-fg); +} +.sidebar-resizing { + -moz-user-select: none; + -webkit-user-select: none; + -ms-user-select: none; + user-select: none; +} +.js:not(.sidebar-resizing) .sidebar { + transition: transform 0.3s; /* Animation: slide away */ +} +.sidebar code { + line-height: 2em; +} +.sidebar .sidebar-scrollbox { + overflow-y: auto; + position: absolute; + top: 0; + bottom: 0; + left: 0; + right: 0; + padding: 10px 10px; +} +.sidebar .sidebar-resize-handle { + position: absolute; + cursor: col-resize; + width: 0; + right: 0; + top: 0; + bottom: 0; +} +.js .sidebar .sidebar-resize-handle { + cursor: col-resize; + width: 5px; +} +.sidebar-hidden .sidebar { + transform: translateX(calc(0px - var(--sidebar-width))); +} +.sidebar::-webkit-scrollbar { + background: var(--sidebar-bg); +} +.sidebar::-webkit-scrollbar-thumb { + background: var(--scrollbar); +} + +.sidebar-visible .page-wrapper { + transform: translateX(var(--sidebar-width)); +} +@media only screen and (min-width: 620px) { + .sidebar-visible .page-wrapper { + transform: none; + margin-left: var(--sidebar-width); + } +} + +.chapter { + list-style: none outside none; + padding-left: 0; + line-height: 2.2em; +} + +.chapter ol { + width: 100%; +} + +.chapter li { + display: flex; + color: var(--sidebar-non-existant); +} +.chapter li a { + display: block; + padding: 0; + text-decoration: none; + color: var(--sidebar-fg); +} + +.chapter li a:hover { + color: var(--sidebar-active); +} + +.chapter li a.active { + color: var(--sidebar-active); +} + +.chapter li > a.toggle { + cursor: pointer; + display: block; + margin-left: auto; + padding: 0 10px; + user-select: none; + opacity: 0.68; +} + +.chapter li > a.toggle div { + transition: transform 0.5s; +} + +/* collapse the section */ +.chapter li:not(.expanded) + li > ol { + display: none; +} + +.chapter li.chapter-item { + line-height: 1.5em; + margin-top: 0.6em; +} + +.chapter li.expanded > a.toggle div { + transform: rotate(90deg); +} + +.spacer { + width: 100%; + height: 3px; + margin: 5px 0px; +} +.chapter .spacer { + background-color: var(--sidebar-spacer); +} + +@media (-moz-touch-enabled: 1), (pointer: coarse) { + .chapter li a { padding: 5px 0; } + .spacer { margin: 10px 0; } +} + +.section { + list-style: none outside none; + padding-left: 20px; + line-height: 1.9em; +} + +/* Theme Menu Popup */ + +.theme-popup { + position: absolute; + left: 10px; + top: var(--menu-bar-height); + z-index: 1000; + border-radius: 4px; + font-size: 0.7em; + color: var(--fg); + background: var(--theme-popup-bg); + border: 1px solid var(--theme-popup-border); + margin: 0; + padding: 0; + list-style: none; + display: none; +} +.theme-popup .default { + color: var(--icons); +} +.theme-popup .theme { + width: 100%; + border: 0; + margin: 0; + padding: 2px 10px; + line-height: 25px; + white-space: nowrap; + text-align: left; + cursor: pointer; + color: inherit; + background: inherit; + font-size: inherit; +} +.theme-popup .theme:hover { + background-color: var(--theme-hover); +} +.theme-popup .theme:hover:first-child, +.theme-popup .theme:hover:last-child { + border-top-left-radius: inherit; + border-top-right-radius: inherit; +} diff --git a/css/general.css b/css/general.css new file mode 100644 index 0000000..2cf347f --- /dev/null +++ b/css/general.css @@ -0,0 +1,177 @@ +/* Base styles and content styles */ + +@import 'variables.css'; + +:root { + /* Browser default font-size is 16px, this way 1 rem = 10px */ + font-size: 62.5%; +} + +html { + font-family: "Open Sans", sans-serif; + color: var(--fg); + background-color: var(--bg); + text-size-adjust: none; +} + +body { + margin: 0; + font-size: 1.6rem; + overflow-x: hidden; +} + +code { + font-family: "Source Code Pro", Consolas, "Ubuntu Mono", Menlo, "DejaVu Sans Mono", monospace, monospace !important; + font-size: 0.875em; /* please adjust the ace font size accordingly in editor.js */ +} + +/* Don't change font size in headers. */ +h1 code, h2 code, h3 code, h4 code, h5 code, h6 code { + font-size: unset; +} + +.left { float: left; } +.right { float: right; } +.boring { opacity: 0.6; } +.hide-boring .boring { display: none; } +.hidden { display: none !important; } + +h2, h3 { margin-top: 2.5em; } +h4, h5 { margin-top: 2em; } + +.header + .header h3, +.header + .header h4, +.header + .header h5 { + margin-top: 1em; +} + +h1:target::before, +h2:target::before, +h3:target::before, +h4:target::before, +h5:target::before, +h6:target::before { + display: inline-block; + content: "»"; + margin-left: -30px; + width: 30px; +} + +/* This is broken on Safari as of version 14, but is fixed + in Safari Technology Preview 117 which I think will be Safari 14.2. + https://bugs.webkit.org/show_bug.cgi?id=218076 +*/ +:target { + scroll-margin-top: calc(var(--menu-bar-height) + 0.5em); +} + +.page { + outline: 0; + padding: 0 var(--page-padding); + margin-top: calc(0px - var(--menu-bar-height)); /* Compensate for the #menu-bar-hover-placeholder */ +} +.page-wrapper { + box-sizing: border-box; +} +.js:not(.sidebar-resizing) .page-wrapper { + transition: margin-left 0.3s ease, transform 0.3s ease; /* Animation: slide away */ +} + +.content { + overflow-y: auto; + padding: 0 15px; + padding-bottom: 50px; +} +.content main { + margin-left: auto; + margin-right: auto; + max-width: var(--content-max-width); +} +.content p { line-height: 1.45em; } +.content ol { line-height: 1.45em; } +.content ul { line-height: 1.45em; } +.content a { text-decoration: none; } +.content a:hover { text-decoration: underline; } +.content img, .content video { max-width: 100%; } +.content .header:link, +.content .header:visited { + color: var(--fg); +} +.content .header:link, +.content .header:visited:hover { + text-decoration: none; +} + +table { + margin: 0 auto; + border-collapse: collapse; +} +table td { + padding: 3px 20px; + border: 1px var(--table-border-color) solid; +} +table thead { + background: var(--table-header-bg); +} +table thead td { + font-weight: 700; + border: none; +} +table thead th { + padding: 3px 20px; +} +table thead tr { + border: 1px var(--table-header-bg) solid; +} +/* Alternate background colors for rows */ +table tbody tr:nth-child(2n) { + background: var(--table-alternate-bg); +} + + +blockquote { + margin: 20px 0; + padding: 0 20px; + color: var(--fg); + background-color: var(--quote-bg); + border-top: .1em solid var(--quote-border); + border-bottom: .1em solid var(--quote-border); +} + + +:not(.footnote-definition) + .footnote-definition, +.footnote-definition + :not(.footnote-definition) { + margin-top: 2em; +} +.footnote-definition { + font-size: 0.9em; + margin: 0.5em 0; +} +.footnote-definition p { + display: inline; +} + +.tooltiptext { + position: absolute; + visibility: hidden; + color: #fff; + background-color: #333; + transform: translateX(-50%); /* Center by moving tooltip 50% of its width left */ + left: -8px; /* Half of the width of the icon */ + top: -35px; + font-size: 0.8em; + text-align: center; + border-radius: 6px; + padding: 5px 8px; + margin: 5px; + z-index: 1000; +} +.tooltipped .tooltiptext { + visibility: visible; +} + +.chapter li.part-title { + color: var(--sidebar-fg); + margin: 5px 0px; + font-weight: bold; +} diff --git a/css/print.css b/css/print.css new file mode 100644 index 0000000..5e690f7 --- /dev/null +++ b/css/print.css @@ -0,0 +1,54 @@ + +#sidebar, +#menu-bar, +.nav-chapters, +.mobile-nav-chapters { + display: none; +} + +#page-wrapper.page-wrapper { + transform: none; + margin-left: 0px; + overflow-y: initial; +} + +#content { + max-width: none; + margin: 0; + padding: 0; +} + +.page { + overflow-y: initial; +} + +code { + background-color: #666666; + border-radius: 5px; + + /* Force background to be printed in Chrome */ + -webkit-print-color-adjust: exact; +} + +pre > .buttons { + z-index: 2; +} + +a, a:visited, a:active, a:hover { + color: #4183c4; + text-decoration: none; +} + +h1, h2, h3, h4, h5, h6 { + page-break-inside: avoid; + page-break-after: avoid; +} + +pre, code { + page-break-inside: avoid; + white-space: pre-wrap; +} + +.fa { + display: none !important; +} diff --git a/css/variables.css b/css/variables.css new file mode 100644 index 0000000..9ff64d6 --- /dev/null +++ b/css/variables.css @@ -0,0 +1,253 @@ + +/* Globals */ + +:root { + --sidebar-width: 300px; + --page-padding: 15px; + --content-max-width: 750px; + --menu-bar-height: 50px; +} + +/* Themes */ + +.ayu { + --bg: hsl(210, 25%, 8%); + --fg: #c5c5c5; + + --sidebar-bg: #14191f; + --sidebar-fg: #c8c9db; + --sidebar-non-existant: #5c6773; + --sidebar-active: #ffb454; + --sidebar-spacer: #2d334f; + + --scrollbar: var(--sidebar-fg); + + --icons: #737480; + --icons-hover: #b7b9cc; + + --links: #0096cf; + + --inline-code-color: #ffb454; + + --theme-popup-bg: #14191f; + --theme-popup-border: #5c6773; + --theme-hover: #191f26; + + --quote-bg: hsl(226, 15%, 17%); + --quote-border: hsl(226, 15%, 22%); + + --table-border-color: hsl(210, 25%, 13%); + --table-header-bg: hsl(210, 25%, 28%); + --table-alternate-bg: hsl(210, 25%, 11%); + + --searchbar-border-color: #848484; + --searchbar-bg: #424242; + --searchbar-fg: #fff; + --searchbar-shadow-color: #d4c89f; + --searchresults-header-fg: #666; + --searchresults-border-color: #888; + --searchresults-li-bg: #252932; + --search-mark-bg: #e3b171; +} + +.coal { + --bg: hsl(200, 7%, 8%); + --fg: #98a3ad; + + --sidebar-bg: #292c2f; + --sidebar-fg: #a1adb8; + --sidebar-non-existant: #505254; + --sidebar-active: #3473ad; + --sidebar-spacer: #393939; + + --scrollbar: var(--sidebar-fg); + + --icons: #43484d; + --icons-hover: #b3c0cc; + + --links: #2b79a2; + + --inline-code-color: #c5c8c6;; + + --theme-popup-bg: #141617; + --theme-popup-border: #43484d; + --theme-hover: #1f2124; + + --quote-bg: hsl(234, 21%, 18%); + --quote-border: hsl(234, 21%, 23%); + + --table-border-color: hsl(200, 7%, 13%); + --table-header-bg: hsl(200, 7%, 28%); + --table-alternate-bg: hsl(200, 7%, 11%); + + --searchbar-border-color: #aaa; + --searchbar-bg: #b7b7b7; + --searchbar-fg: #000; + --searchbar-shadow-color: #aaa; + --searchresults-header-fg: #666; + --searchresults-border-color: #98a3ad; + --searchresults-li-bg: #2b2b2f; + --search-mark-bg: #355c7d; +} + +.light { + --bg: hsl(0, 0%, 100%); + --fg: hsl(0, 0%, 0%); + + --sidebar-bg: #fafafa; + --sidebar-fg: hsl(0, 0%, 0%); + --sidebar-non-existant: #aaaaaa; + --sidebar-active: #1f1fff; + --sidebar-spacer: #f4f4f4; + + --scrollbar: #8F8F8F; + + --icons: #747474; + --icons-hover: #000000; + + --links: #20609f; + + --inline-code-color: #301900; + + --theme-popup-bg: #fafafa; + --theme-popup-border: #cccccc; + --theme-hover: #e6e6e6; + + --quote-bg: hsl(197, 37%, 96%); + --quote-border: hsl(197, 37%, 91%); + + --table-border-color: hsl(0, 0%, 95%); + --table-header-bg: hsl(0, 0%, 80%); + --table-alternate-bg: hsl(0, 0%, 97%); + + --searchbar-border-color: #aaa; + --searchbar-bg: #fafafa; + --searchbar-fg: #000; + --searchbar-shadow-color: #aaa; + --searchresults-header-fg: #666; + --searchresults-border-color: #888; + --searchresults-li-bg: #e4f2fe; + --search-mark-bg: #a2cff5; +} + +.navy { + --bg: hsl(226, 23%, 11%); + --fg: #bcbdd0; + + --sidebar-bg: #282d3f; + --sidebar-fg: #c8c9db; + --sidebar-non-existant: #505274; + --sidebar-active: #2b79a2; + --sidebar-spacer: #2d334f; + + --scrollbar: var(--sidebar-fg); + + --icons: #737480; + --icons-hover: #b7b9cc; + + --links: #2b79a2; + + --inline-code-color: #c5c8c6;; + + --theme-popup-bg: #161923; + --theme-popup-border: #737480; + --theme-hover: #282e40; + + --quote-bg: hsl(226, 15%, 17%); + --quote-border: hsl(226, 15%, 22%); + + --table-border-color: hsl(226, 23%, 16%); + --table-header-bg: hsl(226, 23%, 31%); + --table-alternate-bg: hsl(226, 23%, 14%); + + --searchbar-border-color: #aaa; + --searchbar-bg: #aeaec6; + --searchbar-fg: #000; + --searchbar-shadow-color: #aaa; + --searchresults-header-fg: #5f5f71; + --searchresults-border-color: #5c5c68; + --searchresults-li-bg: #242430; + --search-mark-bg: #a2cff5; +} + +.rust { + --bg: hsl(60, 9%, 87%); + --fg: #262625; + + --sidebar-bg: #3b2e2a; + --sidebar-fg: #c8c9db; + --sidebar-non-existant: #505254; + --sidebar-active: #e69f67; + --sidebar-spacer: #45373a; + + --scrollbar: var(--sidebar-fg); + + --icons: #737480; + --icons-hover: #262625; + + --links: #2b79a2; + + --inline-code-color: #6e6b5e; + + --theme-popup-bg: #e1e1db; + --theme-popup-border: #b38f6b; + --theme-hover: #99908a; + + --quote-bg: hsl(60, 5%, 75%); + --quote-border: hsl(60, 5%, 70%); + + --table-border-color: hsl(60, 9%, 82%); + --table-header-bg: #b3a497; + --table-alternate-bg: hsl(60, 9%, 84%); + + --searchbar-border-color: #aaa; + --searchbar-bg: #fafafa; + --searchbar-fg: #000; + --searchbar-shadow-color: #aaa; + --searchresults-header-fg: #666; + --searchresults-border-color: #888; + --searchresults-li-bg: #dec2a2; + --search-mark-bg: #e69f67; +} + +@media (prefers-color-scheme: dark) { + .light.no-js { + --bg: hsl(200, 7%, 8%); + --fg: #98a3ad; + + --sidebar-bg: #292c2f; + --sidebar-fg: #a1adb8; + --sidebar-non-existant: #505254; + --sidebar-active: #3473ad; + --sidebar-spacer: #393939; + + --scrollbar: var(--sidebar-fg); + + --icons: #43484d; + --icons-hover: #b3c0cc; + + --links: #2b79a2; + + --inline-code-color: #c5c8c6;; + + --theme-popup-bg: #141617; + --theme-popup-border: #43484d; + --theme-hover: #1f2124; + + --quote-bg: hsl(234, 21%, 18%); + --quote-border: hsl(234, 21%, 23%); + + --table-border-color: hsl(200, 7%, 13%); + --table-header-bg: hsl(200, 7%, 28%); + --table-alternate-bg: hsl(200, 7%, 11%); + + --searchbar-border-color: #aaa; + --searchbar-bg: #b7b7b7; + --searchbar-fg: #000; + --searchbar-shadow-color: #aaa; + --searchresults-header-fg: #666; + --searchresults-border-color: #98a3ad; + --searchresults-li-bg: #2b2b2f; + --search-mark-bg: #355c7d; + } +} diff --git a/elasticlunr.min.js b/elasticlunr.min.js new file mode 100644 index 0000000..94b20dd --- /dev/null +++ b/elasticlunr.min.js @@ -0,0 +1,10 @@ +/** + * elasticlunr - http://weixsong.github.io + * Lightweight full-text search engine in Javascript for browser search and offline search. - 0.9.5 + * + * Copyright (C) 2017 Oliver Nightingale + * Copyright (C) 2017 Wei Song + * MIT Licensed + * @license + */ +!function(){function e(e){if(null===e||"object"!=typeof e)return e;var t=e.constructor();for(var n in e)e.hasOwnProperty(n)&&(t[n]=e[n]);return t}var t=function(e){var n=new t.Index;return n.pipeline.add(t.trimmer,t.stopWordFilter,t.stemmer),e&&e.call(n,n),n};t.version="0.9.5",lunr=t,t.utils={},t.utils.warn=function(e){return function(t){e.console&&console.warn&&console.warn(t)}}(this),t.utils.toString=function(e){return void 0===e||null===e?"":e.toString()},t.EventEmitter=function(){this.events={}},t.EventEmitter.prototype.addListener=function(){var e=Array.prototype.slice.call(arguments),t=e.pop(),n=e;if("function"!=typeof t)throw new TypeError("last argument must be a function");n.forEach(function(e){this.hasHandler(e)||(this.events[e]=[]),this.events[e].push(t)},this)},t.EventEmitter.prototype.removeListener=function(e,t){if(this.hasHandler(e)){var n=this.events[e].indexOf(t);-1!==n&&(this.events[e].splice(n,1),0==this.events[e].length&&delete this.events[e])}},t.EventEmitter.prototype.emit=function(e){if(this.hasHandler(e)){var t=Array.prototype.slice.call(arguments,1);this.events[e].forEach(function(e){e.apply(void 0,t)},this)}},t.EventEmitter.prototype.hasHandler=function(e){return e in this.events},t.tokenizer=function(e){if(!arguments.length||null===e||void 0===e)return[];if(Array.isArray(e)){var n=e.filter(function(e){return null===e||void 0===e?!1:!0});n=n.map(function(e){return t.utils.toString(e).toLowerCase()});var i=[];return n.forEach(function(e){var n=e.split(t.tokenizer.seperator);i=i.concat(n)},this),i}return e.toString().trim().toLowerCase().split(t.tokenizer.seperator)},t.tokenizer.defaultSeperator=/[\s\-]+/,t.tokenizer.seperator=t.tokenizer.defaultSeperator,t.tokenizer.setSeperator=function(e){null!==e&&void 0!==e&&"object"==typeof e&&(t.tokenizer.seperator=e)},t.tokenizer.resetSeperator=function(){t.tokenizer.seperator=t.tokenizer.defaultSeperator},t.tokenizer.getSeperator=function(){return t.tokenizer.seperator},t.Pipeline=function(){this._queue=[]},t.Pipeline.registeredFunctions={},t.Pipeline.registerFunction=function(e,n){n in t.Pipeline.registeredFunctions&&t.utils.warn("Overwriting existing registered function: "+n),e.label=n,t.Pipeline.registeredFunctions[n]=e},t.Pipeline.getRegisteredFunction=function(e){return e in t.Pipeline.registeredFunctions!=!0?null:t.Pipeline.registeredFunctions[e]},t.Pipeline.warnIfFunctionNotRegistered=function(e){var n=e.label&&e.label in this.registeredFunctions;n||t.utils.warn("Function is not registered with pipeline. This may cause problems when serialising the index.\n",e)},t.Pipeline.load=function(e){var n=new t.Pipeline;return e.forEach(function(e){var i=t.Pipeline.getRegisteredFunction(e);if(!i)throw new Error("Cannot load un-registered function: "+e);n.add(i)}),n},t.Pipeline.prototype.add=function(){var e=Array.prototype.slice.call(arguments);e.forEach(function(e){t.Pipeline.warnIfFunctionNotRegistered(e),this._queue.push(e)},this)},t.Pipeline.prototype.after=function(e,n){t.Pipeline.warnIfFunctionNotRegistered(n);var i=this._queue.indexOf(e);if(-1===i)throw new Error("Cannot find existingFn");this._queue.splice(i+1,0,n)},t.Pipeline.prototype.before=function(e,n){t.Pipeline.warnIfFunctionNotRegistered(n);var i=this._queue.indexOf(e);if(-1===i)throw new Error("Cannot find existingFn");this._queue.splice(i,0,n)},t.Pipeline.prototype.remove=function(e){var t=this._queue.indexOf(e);-1!==t&&this._queue.splice(t,1)},t.Pipeline.prototype.run=function(e){for(var t=[],n=e.length,i=this._queue.length,o=0;n>o;o++){for(var r=e[o],s=0;i>s&&(r=this._queue[s](r,o,e),void 0!==r&&null!==r);s++);void 0!==r&&null!==r&&t.push(r)}return t},t.Pipeline.prototype.reset=function(){this._queue=[]},t.Pipeline.prototype.get=function(){return this._queue},t.Pipeline.prototype.toJSON=function(){return this._queue.map(function(e){return t.Pipeline.warnIfFunctionNotRegistered(e),e.label})},t.Index=function(){this._fields=[],this._ref="id",this.pipeline=new t.Pipeline,this.documentStore=new t.DocumentStore,this.index={},this.eventEmitter=new t.EventEmitter,this._idfCache={},this.on("add","remove","update",function(){this._idfCache={}}.bind(this))},t.Index.prototype.on=function(){var e=Array.prototype.slice.call(arguments);return this.eventEmitter.addListener.apply(this.eventEmitter,e)},t.Index.prototype.off=function(e,t){return this.eventEmitter.removeListener(e,t)},t.Index.load=function(e){e.version!==t.version&&t.utils.warn("version mismatch: current "+t.version+" importing "+e.version);var n=new this;n._fields=e.fields,n._ref=e.ref,n.documentStore=t.DocumentStore.load(e.documentStore),n.pipeline=t.Pipeline.load(e.pipeline),n.index={};for(var i in e.index)n.index[i]=t.InvertedIndex.load(e.index[i]);return n},t.Index.prototype.addField=function(e){return this._fields.push(e),this.index[e]=new t.InvertedIndex,this},t.Index.prototype.setRef=function(e){return this._ref=e,this},t.Index.prototype.saveDocument=function(e){return this.documentStore=new t.DocumentStore(e),this},t.Index.prototype.addDoc=function(e,n){if(e){var n=void 0===n?!0:n,i=e[this._ref];this.documentStore.addDoc(i,e),this._fields.forEach(function(n){var o=this.pipeline.run(t.tokenizer(e[n]));this.documentStore.addFieldLength(i,n,o.length);var r={};o.forEach(function(e){e in r?r[e]+=1:r[e]=1},this);for(var s in r){var u=r[s];u=Math.sqrt(u),this.index[n].addToken(s,{ref:i,tf:u})}},this),n&&this.eventEmitter.emit("add",e,this)}},t.Index.prototype.removeDocByRef=function(e){if(e&&this.documentStore.isDocStored()!==!1&&this.documentStore.hasDoc(e)){var t=this.documentStore.getDoc(e);this.removeDoc(t,!1)}},t.Index.prototype.removeDoc=function(e,n){if(e){var n=void 0===n?!0:n,i=e[this._ref];this.documentStore.hasDoc(i)&&(this.documentStore.removeDoc(i),this._fields.forEach(function(n){var o=this.pipeline.run(t.tokenizer(e[n]));o.forEach(function(e){this.index[n].removeToken(e,i)},this)},this),n&&this.eventEmitter.emit("remove",e,this))}},t.Index.prototype.updateDoc=function(e,t){var t=void 0===t?!0:t;this.removeDocByRef(e[this._ref],!1),this.addDoc(e,!1),t&&this.eventEmitter.emit("update",e,this)},t.Index.prototype.idf=function(e,t){var n="@"+t+"/"+e;if(Object.prototype.hasOwnProperty.call(this._idfCache,n))return this._idfCache[n];var i=this.index[t].getDocFreq(e),o=1+Math.log(this.documentStore.length/(i+1));return this._idfCache[n]=o,o},t.Index.prototype.getFields=function(){return this._fields.slice()},t.Index.prototype.search=function(e,n){if(!e)return[];e="string"==typeof e?{any:e}:JSON.parse(JSON.stringify(e));var i=null;null!=n&&(i=JSON.stringify(n));for(var o=new t.Configuration(i,this.getFields()).get(),r={},s=Object.keys(e),u=0;u0&&t.push(e);for(var i in n)"docs"!==i&&"df"!==i&&this.expandToken(e+i,t,n[i]);return t},t.InvertedIndex.prototype.toJSON=function(){return{root:this.root}},t.Configuration=function(e,n){var e=e||"";if(void 0==n||null==n)throw new Error("fields should not be null");this.config={};var i;try{i=JSON.parse(e),this.buildUserConfig(i,n)}catch(o){t.utils.warn("user configuration parse failed, will use default configuration"),this.buildDefaultConfig(n)}},t.Configuration.prototype.buildDefaultConfig=function(e){this.reset(),e.forEach(function(e){this.config[e]={boost:1,bool:"OR",expand:!1}},this)},t.Configuration.prototype.buildUserConfig=function(e,n){var i="OR",o=!1;if(this.reset(),"bool"in e&&(i=e.bool||i),"expand"in e&&(o=e.expand||o),"fields"in e)for(var r in e.fields)if(n.indexOf(r)>-1){var s=e.fields[r],u=o;void 0!=s.expand&&(u=s.expand),this.config[r]={boost:s.boost||0===s.boost?s.boost:1,bool:s.bool||i,expand:u}}else t.utils.warn("field name in user configuration not found in index instance fields");else this.addAllFields2UserConfig(i,o,n)},t.Configuration.prototype.addAllFields2UserConfig=function(e,t,n){n.forEach(function(n){this.config[n]={boost:1,bool:e,expand:t}},this)},t.Configuration.prototype.get=function(){return this.config},t.Configuration.prototype.reset=function(){this.config={}},lunr.SortedSet=function(){this.length=0,this.elements=[]},lunr.SortedSet.load=function(e){var t=new this;return t.elements=e,t.length=e.length,t},lunr.SortedSet.prototype.add=function(){var e,t;for(e=0;e1;){if(r===e)return o;e>r&&(t=o),r>e&&(n=o),i=n-t,o=t+Math.floor(i/2),r=this.elements[o]}return r===e?o:-1},lunr.SortedSet.prototype.locationFor=function(e){for(var t=0,n=this.elements.length,i=n-t,o=t+Math.floor(i/2),r=this.elements[o];i>1;)e>r&&(t=o),r>e&&(n=o),i=n-t,o=t+Math.floor(i/2),r=this.elements[o];return r>e?o:e>r?o+1:void 0},lunr.SortedSet.prototype.intersect=function(e){for(var t=new lunr.SortedSet,n=0,i=0,o=this.length,r=e.length,s=this.elements,u=e.elements;;){if(n>o-1||i>r-1)break;s[n]!==u[i]?s[n]u[i]&&i++:(t.add(s[n]),n++,i++)}return t},lunr.SortedSet.prototype.clone=function(){var e=new lunr.SortedSet;return e.elements=this.toArray(),e.length=e.elements.length,e},lunr.SortedSet.prototype.union=function(e){var t,n,i;this.length>=e.length?(t=this,n=e):(t=e,n=this),i=t.clone();for(var o=0,r=n.toArray();o + + + + diff --git a/fonts/OPEN-SANS-LICENSE.txt b/fonts/OPEN-SANS-LICENSE.txt new file mode 100644 index 0000000..d645695 --- /dev/null +++ b/fonts/OPEN-SANS-LICENSE.txt @@ -0,0 +1,202 @@ + + Apache License + Version 2.0, January 2004 + http://www.apache.org/licenses/ + + TERMS AND CONDITIONS FOR USE, REPRODUCTION, AND DISTRIBUTION + + 1. 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We also recommend that a + file or class name and description of purpose be included on the + same "printed page" as the copyright notice for easier + identification within third-party archives. + + Copyright [yyyy] [name of copyright owner] + + Licensed under the Apache License, Version 2.0 (the "License"); + you may not use this file except in compliance with the License. + You may obtain a copy of the License at + + http://www.apache.org/licenses/LICENSE-2.0 + + Unless required by applicable law or agreed to in writing, software + distributed under the License is distributed on an "AS IS" BASIS, + WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. + See the License for the specific language governing permissions and + limitations under the License. diff --git a/fonts/SOURCE-CODE-PRO-LICENSE.txt b/fonts/SOURCE-CODE-PRO-LICENSE.txt new file mode 100644 index 0000000..366206f --- /dev/null +++ b/fonts/SOURCE-CODE-PRO-LICENSE.txt @@ -0,0 +1,93 @@ +Copyright 2010, 2012 Adobe Systems Incorporated (http://www.adobe.com/), with Reserved Font Name 'Source'. All Rights Reserved. Source is a trademark of Adobe Systems Incorporated in the United States and/or other countries. + +This Font Software is licensed under the SIL Open Font License, Version 1.1. +This license is copied below, and is also available with a FAQ at: +http://scripts.sil.org/OFL + + +----------------------------------------------------------- +SIL OPEN FONT LICENSE Version 1.1 - 26 February 2007 +----------------------------------------------------------- + +PREAMBLE +The goals of the Open Font License (OFL) are to stimulate worldwide +development of collaborative font projects, to support the font creation +efforts of academic and linguistic communities, and to provide a free and +open framework in which fonts may be shared and improved in partnership +with others. + +The OFL allows the licensed fonts to be used, studied, modified and +redistributed freely as long as they are not sold by themselves. The +fonts, including any derivative works, can be bundled, embedded, +redistributed and/or sold with any software provided that any reserved +names are not used by derivative works. The fonts and derivatives, +however, cannot be released under any other type of license. The +requirement for fonts to remain under this license does not apply +to any document created using the fonts or their derivatives. + +DEFINITIONS +"Font Software" refers to the set of files released by the Copyright +Holder(s) under this license and clearly marked as such. This may +include source files, build scripts and documentation. + +"Reserved Font Name" refers to any names specified as such after the +copyright statement(s). + +"Original Version" refers to the collection of Font Software components as +distributed by the Copyright Holder(s). + +"Modified Version" refers to any derivative made by adding to, deleting, +or substituting -- in part or in whole -- any of the components of the +Original Version, by changing formats or by porting the Font Software to a +new environment. + +"Author" refers to any designer, engineer, programmer, technical +writer or other person who contributed to the Font Software. + +PERMISSION & CONDITIONS +Permission is hereby granted, free of charge, to any person obtaining +a copy of the Font Software, to use, study, copy, merge, embed, modify, +redistribute, and sell modified and unmodified copies of the Font +Software, subject to the following conditions: + +1) Neither the Font Software nor any of its individual components, +in Original or Modified Versions, may be sold by itself. + +2) Original or Modified Versions of the Font Software may be bundled, +redistributed and/or sold with any software, provided that each copy +contains the above copyright notice and this license. These can be +included either as stand-alone text files, human-readable headers or +in the appropriate machine-readable metadata fields within text or +binary files as long as those fields can be easily viewed by the user. + +3) No Modified Version of the Font Software may use the Reserved Font +Name(s) unless explicit written permission is granted by the corresponding +Copyright Holder. This restriction only applies to the primary font name as +presented to the users. + +4) The name(s) of the Copyright Holder(s) or the Author(s) of the Font +Software shall not be used to promote, endorse or advertise any +Modified Version, except to acknowledge the contribution(s) of the +Copyright Holder(s) and the Author(s) or with their explicit written +permission. + +5) The Font Software, modified or unmodified, in part or in whole, +must be distributed entirely under this license, and must not be +distributed under any other license. The requirement for fonts to +remain under this license does not apply to any document created +using the Font Software. + +TERMINATION +This license becomes null and void if any of the above conditions are +not met. + +DISCLAIMER +THE FONT SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, +EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO ANY WARRANTIES OF +MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT +OF COPYRIGHT, PATENT, TRADEMARK, OR OTHER RIGHT. IN NO EVENT SHALL THE +COPYRIGHT HOLDER BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, +INCLUDING ANY GENERAL, SPECIAL, INDIRECT, INCIDENTAL, OR CONSEQUENTIAL +DAMAGES, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING +FROM, OUT OF THE USE OR INABILITY TO USE THE FONT SOFTWARE OR FROM +OTHER DEALINGS IN THE FONT SOFTWARE. diff --git a/fonts/fonts.css b/fonts/fonts.css new file mode 100644 index 0000000..858efa5 --- /dev/null +++ b/fonts/fonts.css @@ -0,0 +1,100 @@ +/* Open Sans is licensed under the Apache License, Version 2.0. See http://www.apache.org/licenses/LICENSE-2.0 */ +/* Source Code Pro is under the Open Font License. See https://scripts.sil.org/cms/scripts/page.php?site_id=nrsi&id=OFL */ + +/* open-sans-300 - latin_vietnamese_latin-ext_greek-ext_greek_cyrillic-ext_cyrillic */ +@font-face { + font-family: 'Open Sans'; + font-style: normal; + font-weight: 300; + src: local('Open Sans Light'), local('OpenSans-Light'), + url('open-sans-v17-all-charsets-300.woff2') format('woff2'); +} + +/* open-sans-300italic - latin_vietnamese_latin-ext_greek-ext_greek_cyrillic-ext_cyrillic */ +@font-face { + font-family: 'Open Sans'; + font-style: italic; + font-weight: 300; + src: local('Open Sans Light Italic'), local('OpenSans-LightItalic'), + url('open-sans-v17-all-charsets-300italic.woff2') format('woff2'); +} + +/* open-sans-regular - latin_vietnamese_latin-ext_greek-ext_greek_cyrillic-ext_cyrillic */ +@font-face { + font-family: 'Open Sans'; + font-style: normal; + font-weight: 400; + src: local('Open Sans Regular'), local('OpenSans-Regular'), + url('open-sans-v17-all-charsets-regular.woff2') format('woff2'); +} + +/* open-sans-italic - latin_vietnamese_latin-ext_greek-ext_greek_cyrillic-ext_cyrillic */ +@font-face { + font-family: 'Open Sans'; + font-style: italic; + font-weight: 400; + src: local('Open Sans Italic'), local('OpenSans-Italic'), + url('open-sans-v17-all-charsets-italic.woff2') format('woff2'); +} + +/* open-sans-600 - latin_vietnamese_latin-ext_greek-ext_greek_cyrillic-ext_cyrillic */ +@font-face { + font-family: 'Open Sans'; + font-style: normal; + font-weight: 600; + src: local('Open Sans SemiBold'), local('OpenSans-SemiBold'), + url('open-sans-v17-all-charsets-600.woff2') format('woff2'); +} + +/* open-sans-600italic - latin_vietnamese_latin-ext_greek-ext_greek_cyrillic-ext_cyrillic */ +@font-face { + font-family: 'Open Sans'; + font-style: italic; + font-weight: 600; + src: local('Open Sans SemiBold Italic'), local('OpenSans-SemiBoldItalic'), + url('open-sans-v17-all-charsets-600italic.woff2') format('woff2'); +} + +/* open-sans-700 - latin_vietnamese_latin-ext_greek-ext_greek_cyrillic-ext_cyrillic */ +@font-face { + font-family: 'Open Sans'; + font-style: normal; + font-weight: 700; + src: local('Open Sans Bold'), local('OpenSans-Bold'), + url('open-sans-v17-all-charsets-700.woff2') format('woff2'); +} + +/* open-sans-700italic - latin_vietnamese_latin-ext_greek-ext_greek_cyrillic-ext_cyrillic */ +@font-face { + font-family: 'Open Sans'; + font-style: italic; + font-weight: 700; + src: local('Open Sans Bold Italic'), local('OpenSans-BoldItalic'), + url('open-sans-v17-all-charsets-700italic.woff2') format('woff2'); +} + +/* open-sans-800 - latin_vietnamese_latin-ext_greek-ext_greek_cyrillic-ext_cyrillic */ +@font-face { + font-family: 'Open Sans'; + font-style: normal; + font-weight: 800; + src: local('Open Sans ExtraBold'), local('OpenSans-ExtraBold'), + url('open-sans-v17-all-charsets-800.woff2') format('woff2'); +} + +/* open-sans-800italic - latin_vietnamese_latin-ext_greek-ext_greek_cyrillic-ext_cyrillic */ +@font-face { + font-family: 'Open Sans'; + font-style: italic; + font-weight: 800; + src: local('Open Sans ExtraBold Italic'), local('OpenSans-ExtraBoldItalic'), + url('open-sans-v17-all-charsets-800italic.woff2') format('woff2'); +} + +/* source-code-pro-500 - latin_vietnamese_latin-ext_greek_cyrillic-ext_cyrillic */ +@font-face { + font-family: 'Source Code Pro'; + font-style: normal; + font-weight: 500; + src: url('source-code-pro-v11-all-charsets-500.woff2') format('woff2'); +} diff --git a/fonts/open-sans-v17-all-charsets-300.woff2 b/fonts/open-sans-v17-all-charsets-300.woff2 new file mode 100644 index 0000000..9f51be3 Binary files /dev/null and b/fonts/open-sans-v17-all-charsets-300.woff2 differ diff --git a/fonts/open-sans-v17-all-charsets-300italic.woff2 b/fonts/open-sans-v17-all-charsets-300italic.woff2 new file mode 100644 index 0000000..2f54544 Binary files /dev/null and b/fonts/open-sans-v17-all-charsets-300italic.woff2 differ diff --git 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+ +
+ + + + + + + + + +
+
+

Introduction

+

Bitcoin Circle STARK includes Bitcoin script implementations of various cryptographic primitives for STARK.

+

Essentially, it's a collection of building blocks of a Circle STARK verifier in Bitcoin script.

+ + +
+ + +
+
+ + + +
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i.matches(e,this.opt.exclude.concat(["script","style","title","head","html"]))}},{key:"wrapRangeInTextNode",value:function(e,t,n){var r=this.opt.element?this.opt.element:"mark",i=e.splitText(t),o=i.splitText(n-t),a=document.createElement(r);return a.setAttribute("data-markjs","true"),this.opt.className&&a.setAttribute("class",this.opt.className),a.textContent=i.textContent,i.parentNode.replaceChild(a,i),o}},{key:"wrapRangeInMappedTextNode",value:function(e,t,n,r,i){var o=this;e.nodes.every(function(a,s){var c=e.nodes[s+1];if(void 0===c||c.start>t){if(!r(a.node))return!1;var u=t-a.start,l=(n>a.end?a.end:n)-a.start,h=e.value.substr(0,a.start),f=e.value.substr(l+a.start);if(a.node=o.wrapRangeInTextNode(a.node,u,l),e.value=h+f,e.nodes.forEach(function(t,n){n>=s&&(e.nodes[n].start>0&&n!==s&&(e.nodes[n].start-=l),e.nodes[n].end-=l)}),n-=l,i(a.node.previousSibling,a.start),!(n>a.end))return!1;t=a.end}return!0})}},{key:"wrapGroups",value:function(e,t,n,r){return r((e=this.wrapRangeInTextNode(e,t,t+n)).previousSibling),e}},{key:"separateGroups",value:function(e,t,n,r,i){for(var o=t.length,a=1;a-1&&r(t[a],e)&&(e=this.wrapGroups(e,s,t[a].length,i))}return e}},{key:"wrapMatches",value:function(e,t,n,r,i){var o=this,a=0===t?0:t+1;this.getTextNodes(function(t){t.nodes.forEach(function(t){t=t.node;for(var i=void 0;null!==(i=e.exec(t.textContent))&&""!==i[a];){if(o.opt.separateGroups)t=o.separateGroups(t,i,a,n,r);else{if(!n(i[a],t))continue;var s=i.index;if(0!==a)for(var c=1;c + + + + + Primitives - Bitcoin Circle STARK + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + +
+ +
+ + + + + + + + + +
+
+

Primitives

+

M31, CM31, QM31, Circle Point

+
    +
  • Implementation of add, sub, mul of Mersenne-31 (M31), its complex extension (CM31), and its degree-4 extension (QM31), which is imported from BitVM/rust-bitcoin-m31-or-babybear.
    • +
+

CirclePoint over QM31

+
    +
  • Implementation of doubling of a circle point over QM31.
    • +
  • Implementation of drawing a random point on the circle over QM31, useful for Order-Optimal Data Structures (OODS).
    • +
+

Fiat-Shamir Transcript

+
    +
  • Also known as "channel," which is the term used in Starkware's stwo library.
    • +
  • Absorbing commitments and QM31 elements through OP_CAT + OP_SHA256.
    • +
  • Squeezing random elements for Fiat-Shamir transform using hints and OP_CAT + OP_SHA256.
    • +
+

Proof-of-Work Check

+
    +
  • Calculating a proof-of-work nonce for the "channel", based on specified security bits.
    • +
  • Verifying the proof-of-work nonce and computing the new "channel" state.
    • +
+

Merkle Tree

+
    +
  • Implementation of Merkle path verification using hints and OP_CAT + OP_SHA256.
    • +
+ +
+ + +
+
+ + + +
+ + + + + + + + + + + + + + + + + + + + diff --git a/print.html b/print.html new file mode 100644 index 0000000..1ab7388 --- /dev/null +++ b/print.html @@ -0,0 +1,224 @@ + + + + + + Bitcoin Circle STARK + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + +
+ +
+ + + + + + + + + +
+
+

Introduction

+

Bitcoin Circle STARK includes Bitcoin script implementations of various cryptographic primitives for STARK.

+

Essentially, it's a collection of building blocks of a Circle STARK verifier in Bitcoin script.

+ +

Primitives

+

M31, CM31, QM31, Circle Point

+
    +
  • Implementation of add, sub, mul of Mersenne-31 (M31), its complex extension (CM31), and its degree-4 extension (QM31), which is imported from BitVM/rust-bitcoin-m31-or-babybear.
    • +
+

CirclePoint over QM31

+
    +
  • Implementation of doubling of a circle point over QM31.
    • +
  • Implementation of drawing a random point on the circle over QM31, useful for Order-Optimal Data Structures (OODS).
    • +
+

Fiat-Shamir Transcript

+
    +
  • Also known as "channel," which is the term used in Starkware's stwo library.
    • +
  • Absorbing commitments and QM31 elements through OP_CAT + OP_SHA256.
    • +
  • Squeezing random elements for Fiat-Shamir transform using hints and OP_CAT + OP_SHA256.
    • +
+

Proof-of-Work Check

+
    +
  • Calculating a proof-of-work nonce for the "channel", based on specified security bits.
    • +
  • Verifying the proof-of-work nonce and computing the new "channel" state.
    • +
+

Merkle Tree

+
    +
  • Implementation of Merkle path verification using hints and OP_CAT + OP_SHA256.
    • +
+ +
+ + +
+
+ + + +
+ + + + + + + + + + + + + + + + + + + + + diff --git a/rust-toolchain.toml b/rust-toolchain.toml deleted file mode 100644 index 860a7ce..0000000 --- a/rust-toolchain.toml +++ /dev/null @@ -1,2 +0,0 @@ -[toolchain] -channel = "nightly-2024-01-04" \ No newline at end of file diff --git a/searcher.js b/searcher.js new file mode 100644 index 0000000..d2b0aee --- /dev/null +++ b/searcher.js @@ -0,0 +1,483 @@ +"use strict"; +window.search = window.search || {}; +(function search(search) { + // Search functionality + // + // You can use !hasFocus() to prevent keyhandling in your key + // event handlers while the user is typing their search. + + if (!Mark || !elasticlunr) { + return; + } + + //IE 11 Compatibility from https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/String/startsWith + if (!String.prototype.startsWith) { + String.prototype.startsWith = function(search, pos) { + return this.substr(!pos || pos < 0 ? 0 : +pos, search.length) === search; + }; + } + + var search_wrap = document.getElementById('search-wrapper'), + searchbar = document.getElementById('searchbar'), + searchbar_outer = document.getElementById('searchbar-outer'), + searchresults = document.getElementById('searchresults'), + searchresults_outer = document.getElementById('searchresults-outer'), + searchresults_header = document.getElementById('searchresults-header'), + searchicon = document.getElementById('search-toggle'), + content = document.getElementById('content'), + + searchindex = null, + doc_urls = [], + results_options = { + teaser_word_count: 30, + limit_results: 30, + }, + search_options = { + bool: "AND", + expand: true, + fields: { + title: {boost: 1}, + body: {boost: 1}, + breadcrumbs: {boost: 0} + } + }, + mark_exclude = [], + marker = new Mark(content), + current_searchterm = "", + URL_SEARCH_PARAM = 'search', + URL_MARK_PARAM = 'highlight', + teaser_count = 0, + + SEARCH_HOTKEY_KEYCODE = 83, + ESCAPE_KEYCODE = 27, + DOWN_KEYCODE = 40, + UP_KEYCODE = 38, + SELECT_KEYCODE = 13; + + function hasFocus() { + return searchbar === document.activeElement; + } + + function removeChildren(elem) { + while (elem.firstChild) { + elem.removeChild(elem.firstChild); + } + } + + // Helper to parse a url into its building blocks. + function parseURL(url) { + var a = document.createElement('a'); + a.href = url; + return { + source: url, + protocol: a.protocol.replace(':',''), + host: a.hostname, + port: a.port, + params: (function(){ + var ret = {}; + var seg = a.search.replace(/^\?/,'').split('&'); + var len = seg.length, i = 0, s; + for (;i': '>', + '"': '"', + "'": ''' + }; + var repl = function(c) { return MAP[c]; }; + return function(s) { + return s.replace(/[&<>'"]/g, repl); + }; + })(); + + function formatSearchMetric(count, searchterm) { + if (count == 1) { + return count + " search result for '" + searchterm + "':"; + } else if (count == 0) { + return "No search results for '" + searchterm + "'."; + } else { + return count + " search results for '" + searchterm + "':"; + } + } + + function formatSearchResult(result, searchterms) { + var teaser = makeTeaser(escapeHTML(result.doc.body), searchterms); + teaser_count++; + + // The ?URL_MARK_PARAM= parameter belongs inbetween the page and the #heading-anchor + var url = doc_urls[result.ref].split("#"); + if (url.length == 1) { // no anchor found + url.push(""); + } + + // encodeURIComponent escapes all chars that could allow an XSS except + // for '. Due to that we also manually replace ' with its url-encoded + // representation (%27). + var searchterms = encodeURIComponent(searchterms.join(" ")).replace(/\'/g, "%27"); + + return '' + result.doc.breadcrumbs + '' + + '' + + teaser + ''; + } + + function makeTeaser(body, searchterms) { + // The strategy is as follows: + // First, assign a value to each word in the document: + // Words that correspond to search terms (stemmer aware): 40 + // Normal words: 2 + // First word in a sentence: 8 + // Then use a sliding window with a constant number of words and count the + // sum of the values of the words within the window. Then use the window that got the + // maximum sum. If there are multiple maximas, then get the last one. + // Enclose the terms in . + var stemmed_searchterms = searchterms.map(function(w) { + return elasticlunr.stemmer(w.toLowerCase()); + }); + var searchterm_weight = 40; + var weighted = []; // contains elements of ["word", weight, index_in_document] + // split in sentences, then words + var sentences = body.toLowerCase().split('. '); + var index = 0; + var value = 0; + var searchterm_found = false; + for (var sentenceindex in sentences) { + var words = sentences[sentenceindex].split(' '); + value = 8; + for (var wordindex in words) { + var word = words[wordindex]; + if (word.length > 0) { + for (var searchtermindex in stemmed_searchterms) { + if (elasticlunr.stemmer(word).startsWith(stemmed_searchterms[searchtermindex])) { + value = searchterm_weight; + searchterm_found = true; + } + }; + weighted.push([word, value, index]); + value = 2; + } + index += word.length; + index += 1; // ' ' or '.' if last word in sentence + }; + index += 1; // because we split at a two-char boundary '. ' + }; + + if (weighted.length == 0) { + return body; + } + + var window_weight = []; + var window_size = Math.min(weighted.length, results_options.teaser_word_count); + + var cur_sum = 0; + for (var wordindex = 0; wordindex < window_size; wordindex++) { + cur_sum += weighted[wordindex][1]; + }; + window_weight.push(cur_sum); + for (var wordindex = 0; wordindex < weighted.length - window_size; wordindex++) { + cur_sum -= weighted[wordindex][1]; + cur_sum += weighted[wordindex + window_size][1]; + window_weight.push(cur_sum); + }; + + if (searchterm_found) { + var max_sum = 0; + var max_sum_window_index = 0; + // backwards + for (var i = window_weight.length - 1; i >= 0; i--) { + if (window_weight[i] > max_sum) { + max_sum = window_weight[i]; + max_sum_window_index = i; + } + }; + } else { + max_sum_window_index = 0; + } + + // add around searchterms + var teaser_split = []; + var index = weighted[max_sum_window_index][2]; + for (var i = max_sum_window_index; i < max_sum_window_index+window_size; i++) { + var word = weighted[i]; + if (index < word[2]) { + // missing text from index to start of `word` + teaser_split.push(body.substring(index, word[2])); + index = word[2]; + } + if (word[1] == searchterm_weight) { + teaser_split.push("") + } + index = word[2] + word[0].length; + teaser_split.push(body.substring(word[2], index)); + if (word[1] == searchterm_weight) { + teaser_split.push("") + } + }; + + return teaser_split.join(''); + } + + function init(config) { + results_options = config.results_options; + search_options = config.search_options; + searchbar_outer = config.searchbar_outer; + doc_urls = config.doc_urls; + searchindex = elasticlunr.Index.load(config.index); + + // Set up events + searchicon.addEventListener('click', function(e) { searchIconClickHandler(); }, false); + searchbar.addEventListener('keyup', function(e) { searchbarKeyUpHandler(); }, false); + document.addEventListener('keydown', function(e) { globalKeyHandler(e); }, false); + // If the user uses the browser buttons, do the same as if a reload happened + window.onpopstate = function(e) { doSearchOrMarkFromUrl(); }; + // Suppress "submit" events so the page doesn't reload when the user presses Enter + document.addEventListener('submit', function(e) { e.preventDefault(); }, false); + + // If reloaded, do the search or mark again, depending on the current url parameters + doSearchOrMarkFromUrl(); + } + + function unfocusSearchbar() { + // hacky, but just focusing a div only works once + var tmp = document.createElement('input'); + tmp.setAttribute('style', 'position: absolute; opacity: 0;'); + searchicon.appendChild(tmp); + tmp.focus(); + tmp.remove(); + } + + // On reload or browser history backwards/forwards events, parse the url and do search or mark + function doSearchOrMarkFromUrl() { + // Check current URL for search request + var url = parseURL(window.location.href); + if (url.params.hasOwnProperty(URL_SEARCH_PARAM) + && url.params[URL_SEARCH_PARAM] != "") { + showSearch(true); + searchbar.value = decodeURIComponent( + (url.params[URL_SEARCH_PARAM]+'').replace(/\+/g, '%20')); + searchbarKeyUpHandler(); // -> doSearch() + } else { + showSearch(false); + } + + if (url.params.hasOwnProperty(URL_MARK_PARAM)) { + var words = decodeURIComponent(url.params[URL_MARK_PARAM]).split(' '); + marker.mark(words, { + exclude: mark_exclude + }); + + var markers = document.querySelectorAll("mark"); + function hide() { + for (var i = 0; i < markers.length; i++) { + markers[i].classList.add("fade-out"); + window.setTimeout(function(e) { marker.unmark(); }, 300); + } + } + for (var i = 0; i < markers.length; i++) { + markers[i].addEventListener('click', hide); + } + } + } + + // Eventhandler for keyevents on `document` + function globalKeyHandler(e) { + if (e.altKey || e.ctrlKey || e.metaKey || e.shiftKey || e.target.type === 'textarea' || e.target.type === 'text') { return; } + + if (e.keyCode === ESCAPE_KEYCODE) { + e.preventDefault(); + searchbar.classList.remove("active"); + setSearchUrlParameters("", + (searchbar.value.trim() !== "") ? 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\ No newline at end of file diff --git a/src/channel/bitcoin_script.rs b/src/channel/bitcoin_script.rs deleted file mode 100644 index af60e07..0000000 --- a/src/channel/bitcoin_script.rs +++ /dev/null @@ -1,197 +0,0 @@ -use crate::channel_commit::CommitmentGadget; -use crate::channel_extract::ExtractorGadget; -use crate::treepp::*; -use crate::utils::trim_m31_gadget; - -/// Gadget for a channel. -pub struct ChannelGadget; - -impl ChannelGadget { - /// Initialize a channel. - pub fn create_channel(hash: [u8; 32]) -> Script { - script! { - { hash.to_vec() } - } - } - - /// Absorb a commitment. - pub fn absorb_commitment() -> Script { - script! { - OP_CAT OP_SHA256 - } - } - - /// Absorb a qm31 element. - pub fn absorb_qm31() -> Script { - script! { - OP_TOALTSTACK - { CommitmentGadget::commit_qm31() } - OP_FROMALTSTACK OP_CAT OP_SHA256 - } - } - - /// Squeeze a qm31 element using hints. - pub fn squeeze_qm31_using_hint() -> Script { - script! { - OP_DUP OP_SHA256 OP_SWAP - OP_PUSHBYTES_1 OP_PUSHBYTES_0 OP_CAT OP_SHA256 - { ExtractorGadget::unpack_qm31() } - } - } - - /// Squeeze five queries from the channel, each of logn bits, using hints. - pub fn squeeze_5queries_using_hint(logn: usize) -> Script { - script! { - OP_DUP OP_SHA256 OP_SWAP - OP_PUSHBYTES_1 OP_PUSHBYTES_0 OP_CAT OP_SHA256 - { ExtractorGadget::unpack_5m31() } - { trim_m31_gadget(logn) } OP_TOALTSTACK - { trim_m31_gadget(logn) } OP_TOALTSTACK - { trim_m31_gadget(logn) } OP_TOALTSTACK - { trim_m31_gadget(logn) } OP_TOALTSTACK - { trim_m31_gadget(logn) } - OP_FROMALTSTACK OP_FROMALTSTACK OP_FROMALTSTACK OP_FROMALTSTACK - } - } -} - -#[cfg(test)] -mod test { - use crate::channel::{Channel, ChannelGadget}; - use crate::channel_commit::Commitment; - use crate::channel_extract::ExtractorGadget; - use crate::math::{CM31, M31, QM31}; - use crate::treepp::*; - use bitcoin_script::script; - use rand::{Rng, RngCore, SeedableRng}; - use rand_chacha::ChaCha20Rng; - use rust_bitcoin_m31::qm31_equalverify; - - #[test] - fn test_absorb_commitment() { - let mut prng = ChaCha20Rng::seed_from_u64(0); - - let channel_script = ChannelGadget::absorb_commitment(); - println!( - "Channel.absorb_commitment() = {} bytes", - channel_script.len() - ); - - let mut init_state = [0u8; 32]; - init_state.iter_mut().for_each(|v| *v = prng.gen()); - - let mut elem = [0u8; 32]; - elem.iter_mut().for_each(|v| *v = prng.gen()); - - let mut channel = Channel::new(init_state); - channel.absorb_commitment(&Commitment(elem)); - - let final_state = channel.state; - - let script = script! { - { elem.to_vec() } - { init_state.to_vec() } - { channel_script.clone() } - { final_state.to_vec() } - OP_EQUAL - }; - let exec_result = execute_script(script); - assert!(exec_result.success); - } - - #[test] - fn test_absorb_qm31() { - let mut prng = ChaCha20Rng::seed_from_u64(0); - - let channel_script = ChannelGadget::absorb_qm31(); - println!("Channel.absorb_qm31() = {} bytes", channel_script.len()); - - let mut init_state = [0u8; 32]; - init_state.iter_mut().for_each(|v| *v = prng.gen()); - - let elem = QM31( - CM31(M31::reduce(prng.next_u64()), M31::reduce(prng.next_u64())), - CM31(M31::reduce(prng.next_u64()), M31::reduce(prng.next_u64())), - ); - - let mut channel = Channel::new(init_state); - channel.absorb_qm31(&elem); - - let final_state = channel.state; - - let script = script! { - { elem } - { init_state.to_vec() } - { channel_script.clone() } - { final_state.to_vec() } - OP_EQUAL - }; - let exec_result = execute_script(script); - assert!(exec_result.success); - } - - #[test] - fn test_squeeze_element_using_hint() { - let mut prng = ChaCha20Rng::seed_from_u64(0); - - let channel_script = ChannelGadget::squeeze_qm31_using_hint(); - println!( - "Channel.squeeze_element_using_hint() = {} bytes", - channel_script.len() - ); - - let mut a = [0u8; 32]; - a.iter_mut().for_each(|v| *v = prng.gen()); - - let mut channel = Channel::new(a); - let (b, hint) = channel.draw_qm31(); - - let c = channel.state; - - let script = script! { - { ExtractorGadget::push_hint_qm31(&hint) } - { a.to_vec() } - { channel_script.clone() } - { b } - qm31_equalverify - { c.to_vec() } - OP_EQUAL - }; - let exec_result = execute_script(script); - assert!(exec_result.success); - } - - #[test] - fn test_squeeze_5queries_using_hint() { - let mut prng = ChaCha20Rng::seed_from_u64(0); - - let channel_script = ChannelGadget::squeeze_5queries_using_hint(15); - println!( - "Channel.squeeze_5queries_using_hint() = {} bytes", - channel_script.len() - ); - - let mut a = [0u8; 32]; - a.iter_mut().for_each(|v| *v = prng.gen()); - - let mut channel = Channel::new(a); - let (b, hint) = channel.draw_5queries(15); - - let c = channel.state; - - let script = script! { - { ExtractorGadget::push_hint_5m31(&hint) } - { a.to_vec() } - { channel_script.clone() } - { b[4] } OP_EQUALVERIFY - { b[3] } OP_EQUALVERIFY - { b[2] } OP_EQUALVERIFY - { b[1] } OP_EQUALVERIFY - { b[0] } OP_EQUALVERIFY - { c.to_vec() } - OP_EQUAL - }; - let exec_result = execute_script(script); - assert!(exec_result.success); - } -} diff --git a/src/channel/mod.rs b/src/channel/mod.rs deleted file mode 100644 index e6bf677..0000000 --- a/src/channel/mod.rs +++ /dev/null @@ -1,83 +0,0 @@ -use crate::channel_commit::Commitment; -use crate::channel_extract::{Extraction5M31, ExtractionQM31, Extractor}; -use crate::math::QM31; -use crate::utils::trim_m31; -use sha2::{Digest, Sha256}; - -mod bitcoin_script; -pub use bitcoin_script::*; - -/// A channel. -pub struct Channel { - /// Current state of the channel. - pub state: [u8; 32], -} - -impl Channel { - /// Initialize a new channel. - pub fn new(hash: [u8; 32]) -> Self { - Self { state: hash } - } - - /// Absorb a commitment. - pub fn absorb_commitment(&mut self, commitment: &Commitment) { - let mut hasher = Sha256::new(); - Digest::update(&mut hasher, commitment.0); - Digest::update(&mut hasher, self.state); - self.state.copy_from_slice(hasher.finalize().as_slice()); - } - - /// Absorb a qm31 element. - pub fn absorb_qm31(&mut self, el: &QM31) { - let mut hasher = Sha256::new(); - Digest::update(&mut hasher, Commitment::commit_qm31(*el).0); - Digest::update(&mut hasher, self.state); - self.state.copy_from_slice(hasher.finalize().as_slice()); - } - - /// Draw one qm31 and compute the hints. - pub fn draw_qm31(&mut self) -> (QM31, ExtractionQM31) { - let mut extract = [0u8; 32]; - - let mut hasher = Sha256::new(); - Digest::update(&mut hasher, self.state); - Digest::update(&mut hasher, [0u8]); - extract.copy_from_slice(hasher.finalize().as_slice()); - - let mut hasher = Sha256::new(); - Digest::update(&mut hasher, self.state); - self.state.copy_from_slice(hasher.finalize().as_slice()); - - Extractor::extract_qm31(&extract) - } - - /// Draw five queries and compute the hints. - pub fn draw_5queries(&mut self, logn: usize) -> ([usize; 5], Extraction5M31) { - let mut extract = [0u8; 32]; - - let mut hasher = Sha256::new(); - Digest::update(&mut hasher, self.state); - Digest::update(&mut hasher, [0u8]); - extract.copy_from_slice(hasher.finalize().as_slice()); - - let mut hasher = Sha256::new(); - Digest::update(&mut hasher, self.state); - self.state.copy_from_slice(hasher.finalize().as_slice()); - - let mut res = Extractor::extract_5m31(&extract); - for v in res.0.iter_mut() { - v.0 = trim_m31(v.0, logn); - } - - ( - [ - res.0[0].0 as usize, - res.0[1].0 as usize, - res.0[2].0 as usize, - res.0[3].0 as usize, - res.0[4].0 as usize, - ], - res.1, - ) - } -} diff --git a/src/channel_commit/bitcoin_script.rs b/src/channel_commit/bitcoin_script.rs deleted file mode 100644 index a7ad5b5..0000000 --- a/src/channel_commit/bitcoin_script.rs +++ /dev/null @@ -1,124 +0,0 @@ -use crate::channel_commit::Commitment; -use crate::treepp::pushable::{Builder, Pushable}; -use crate::treepp::*; -use bitcoin::script::PushBytesBuf; - -impl Pushable for Commitment { - fn bitcoin_script_push(self, builder: Builder) -> Builder { - let mut buf = PushBytesBuf::new(); - buf.extend_from_slice(&self.0).unwrap(); - builder.push_slice(buf) - } -} - -/// Gadget for committing field elements. -pub struct CommitmentGadget; -impl CommitmentGadget { - /// Commit a m31 element. - pub fn commit_m31() -> Script { - script! { - OP_SHA256 - } - } - - /// Commit a cm31 element. - pub fn commit_cm31() -> Script { - script! { - OP_SHA256 OP_CAT OP_SHA256 - } - } - - /// Commit a qm31 element. - pub fn commit_qm31() -> Script { - script! { - OP_SHA256 OP_CAT OP_SHA256 OP_CAT OP_SHA256 OP_CAT OP_SHA256 - } - } -} - -#[cfg(test)] -mod test { - use crate::channel_commit::{Commitment, CommitmentGadget}; - use crate::math::{CM31, M31, QM31}; - use crate::treepp::*; - use bitcoin_script::script; - use rand::{RngCore, SeedableRng}; - use rand_chacha::ChaCha20Rng; - - #[test] - fn test_commit_m31() { - let mut prng = ChaCha20Rng::seed_from_u64(0); - - let commit_script = CommitmentGadget::commit_m31(); - println!("M31.commit() = {} bytes", commit_script.len()); - - for _ in 0..100 { - let a = M31::reduce(prng.next_u64()); - let b = Commitment::commit_m31(a); - - let script = script! { - { a } - { commit_script.clone() } - { b.clone() } - OP_EQUAL - }; - let exec_result = execute_script(script); - assert!(exec_result.success); - } - } - - #[test] - fn test_commit_cm31() { - let mut prng = ChaCha20Rng::seed_from_u64(0); - - let commit_script = CommitmentGadget::commit_cm31(); - println!("CM31.commit() = {} bytes", commit_script.len()); - - for _ in 0..100 { - let a = CM31(M31::reduce(prng.next_u64()), M31::reduce(prng.next_u64())); - let b = Commitment::commit_cm31(a); - - let script = script! { - { a } - { commit_script.clone() } - { b.clone() } - OP_EQUAL - }; - let exec_result = execute_script(script); - assert!(exec_result.success); - } - } - - #[test] - fn test_commit_qm31() { - let mut prng = ChaCha20Rng::seed_from_u64(0); - - let commit_script = CommitmentGadget::commit_qm31(); - println!("QM31.commit() = {} bytes", commit_script.len()); - - for _ in 0..100 { - let a = QM31( - CM31(M31::reduce(prng.next_u64()), M31::reduce(prng.next_u64())), - CM31(M31::reduce(prng.next_u64()), M31::reduce(prng.next_u64())), - ); - let b = Commitment::commit_qm31(a); - - let script = script! { - { a } - { commit_script.clone() } - { b.clone() } - OP_EQUAL - }; - let exec_result = execute_script(script); - assert!(exec_result.success); - } - - // make sure OP_CAT is not OP_SUCCESS - let script = script! { - OP_CAT - OP_RETURN - }; - let exec_result = execute_script(script); - assert!(!exec_result.success); - } -} diff --git a/src/channel_commit/mod.rs b/src/channel_commit/mod.rs deleted file mode 100644 index c4bfa99..0000000 --- a/src/channel_commit/mod.rs +++ /dev/null @@ -1,60 +0,0 @@ -use crate::utils::num_to_bytes; -use sha2::{Digest, Sha256}; - -mod bitcoin_script; -use crate::math::{CM31, M31, QM31}; -pub use bitcoin_script::*; - -/// A commitment, which is a 32-byte SHA256 hash -#[derive(Clone, Default, Debug)] -pub struct Commitment(pub [u8; 32]); - -impl Commitment { - /// Commit a m31 element. - pub fn commit_m31(v: M31) -> Self { - let mut res = Self::default(); - - let mut hasher = Sha256::new(); - Digest::update(&mut hasher, &num_to_bytes(v)); - - res.0.copy_from_slice(hasher.finalize().as_slice()); - - res - } - - /// Commit a cm31 element. - pub fn commit_cm31(v: CM31) -> Self { - let mut res = Self::default(); - - let c1 = Self::commit_m31(v.0); - let mut hasher = Sha256::new(); - Digest::update(&mut hasher, num_to_bytes(v.1)); - Digest::update(&mut hasher, c1.0); - - res.0.copy_from_slice(hasher.finalize().as_slice()); - - res - } - - /// Commit a qm31 element. - pub fn commit_qm31(v: QM31) -> Self { - let mut res = Self::default(); - - let mut hasher = Sha256::new(); - Digest::update(&mut hasher, num_to_bytes(v.0 .1)); - Digest::update(&mut hasher, Self::commit_m31(v.0 .0).0); - res.0.copy_from_slice(hasher.finalize().as_slice()); - - let mut hasher = Sha256::new(); - Digest::update(&mut hasher, num_to_bytes(v.1 .0)); - Digest::update(&mut hasher, res.0); - res.0.copy_from_slice(hasher.finalize().as_slice()); - - let mut hasher = Sha256::new(); - Digest::update(&mut hasher, num_to_bytes(v.1 .1)); - Digest::update(&mut hasher, res.0); - res.0.copy_from_slice(hasher.finalize().as_slice()); - - res - } -} diff --git a/src/channel_extract/bitcoin_script.rs b/src/channel_extract/bitcoin_script.rs deleted file mode 100644 index a613d6f..0000000 --- a/src/channel_extract/bitcoin_script.rs +++ /dev/null @@ -1,457 +0,0 @@ -use crate::channel_extract::{Extraction5M31, ExtractionCM31, ExtractionM31, ExtractionQM31}; -use crate::treepp::*; - -/// Gadget for extracting elements. -pub struct ExtractorGadget; -impl ExtractorGadget { - /// Push the hint for extracting a m31 element from a hash. - pub fn push_hint_m31(e: &ExtractionM31) -> Script { - script! { - { e.0 } - { e.1.to_vec() } - } - } - - /// Push the hint for extracting a cm31 element from a hash. - pub fn push_hint_cm31(e: &ExtractionCM31) -> Script { - script! { - { e.0.0 } - { e.0.1 } - { e.1.to_vec() } - } - } - - /// Push the hint for extracting a qm31 element from a hash. - pub fn push_hint_qm31(e: &ExtractionQM31) -> Script { - script! { - { e.0.0 } - { e.0.1 } - { e.0.2 } - { e.0.3 } - { e.1.to_vec() } - } - } - - /// Push the hint for extracting five m31 elements from a hash. - pub fn push_hint_5m31(e: &Extraction5M31) -> Script { - script! { - { e.0.0 } - { e.0.1 } - { e.0.2 } - { e.0.3 } - { e.0.4 } - { e.1.to_vec() } - } - } - - /// Reconstruct a 4-byte representation from a Bitcoin integer. - /// - /// Idea: extract the positive/negative symbol and pad it accordingly. - fn reconstruct() -> Script { - script! { - // handle 0x80 specially---it is the "negative zero", but most arithmetic opcodes refuse to work with it. - OP_DUP OP_PUSHBYTES_1 OP_LEFT OP_EQUAL - OP_IF - OP_DROP - OP_PUSHBYTES_0 OP_TOALTSTACK - OP_PUSHBYTES_4 OP_PUSHBYTES_0 OP_PUSHBYTES_0 OP_PUSHBYTES_0 OP_LEFT - OP_ELSE - OP_DUP OP_ABS - OP_DUP OP_TOALTSTACK - - OP_SIZE 4 OP_LESSTHAN - OP_IF - OP_DUP OP_ROT - OP_EQUAL OP_TOALTSTACK - - // stack: abs(a) - // altstack: abs(a), is_positive - - OP_SIZE 2 OP_LESSTHAN OP_IF OP_PUSHBYTES_2 OP_PUSHBYTES_0 OP_PUSHBYTES_0 OP_CAT OP_ENDIF - OP_SIZE 3 OP_LESSTHAN OP_IF OP_PUSHBYTES_1 OP_PUSHBYTES_0 OP_CAT OP_ENDIF - - OP_FROMALTSTACK - OP_IF - OP_PUSHBYTES_1 OP_PUSHBYTES_0 - OP_ELSE - OP_PUSHBYTES_1 OP_LEFT - OP_ENDIF - OP_CAT - OP_ELSE - OP_DROP - OP_ENDIF - OP_ENDIF - } - } - - /// Reduce the number from [0, 2^31-1] to [0, 2^31-2] by subtracting 1 from any element that is not zero. - /// This is because 2^31-1 is the modulus and a reduced element should be smaller than it. - /// The sampling, therefore, has a small bias. - fn reduce() -> Script { - script! { - OP_DUP OP_NOT OP_NOTIF OP_1SUB OP_ENDIF - } - } - - /// Unpack the hash into a m31 element. - pub fn unpack_m31() -> Script { - script! { - OP_DEPTH OP_1SUB OP_ROLL - OP_DEPTH OP_1SUB OP_ROLL - - OP_SWAP - { Self::reconstruct() } - - OP_SWAP OP_CAT - OP_EQUALVERIFY - OP_FROMALTSTACK - { Self::reduce() } - } - } - - /// Unpack the hash into a cm31 element. - pub fn unpack_cm31() -> Script { - script! { - OP_DEPTH OP_1SUB OP_ROLL - OP_DEPTH OP_1SUB OP_ROLL - OP_DEPTH OP_1SUB OP_ROLL - - OP_ROT - { Self::reconstruct() } - - OP_ROT - { Self::reconstruct() } - - OP_CAT - OP_SWAP OP_CAT - - OP_EQUALVERIFY - OP_FROMALTSTACK - { Self::reduce() } - OP_FROMALTSTACK - { Self::reduce() } - } - } - - /// Unpack the hash into a qm31 element. - pub fn unpack_qm31() -> Script { - script! { - for _ in 0..5 { - OP_DEPTH OP_1SUB OP_ROLL - } - - - for _ in 0..4 { - 4 OP_ROLL - { Self::reconstruct() } - } - - OP_CAT OP_CAT OP_CAT - OP_SWAP OP_CAT - - OP_EQUALVERIFY - OP_FROMALTSTACK - { Self::reduce() } - OP_FROMALTSTACK - { Self::reduce() } - OP_FROMALTSTACK - { Self::reduce() } - OP_FROMALTSTACK - { Self::reduce() } - } - } - - /// Unpack the hash into five m31 elements. - /// TODO: This function needs to be generalized for other number of elements. - pub fn unpack_5m31() -> Script { - script! { - for _ in 0..6 { - OP_DEPTH OP_1SUB OP_ROLL - } - - for _ in 0..5 { - 5 OP_ROLL - { Self::reconstruct() } - } - - OP_CAT OP_CAT OP_CAT OP_CAT - OP_SWAP OP_CAT - - OP_EQUALVERIFY - OP_FROMALTSTACK - { Self::reduce() } - OP_FROMALTSTACK - { Self::reduce() } - OP_FROMALTSTACK - { Self::reduce() } - OP_FROMALTSTACK - { Self::reduce() } - OP_FROMALTSTACK - { Self::reduce() } - OP_SWAP - 2 OP_ROLL - 3 OP_ROLL - 4 OP_ROLL - } - } -} - -#[cfg(test)] -mod test { - use crate::channel_extract::{Extractor, ExtractorGadget}; - use crate::math::{Field, M31}; - use crate::treepp::*; - use bitcoin_script::script; - use rand::{Rng, SeedableRng}; - use rand_chacha::ChaCha20Rng; - - #[test] - fn test_unpack_negative_zero() { - let mut prng = ChaCha20Rng::seed_from_u64(0); - - let mut hash = [0u8; 32]; - for h in hash.iter_mut().skip(4) { - *h = prng.gen(); - } - hash[3] = 0x80; - - let (elem, e) = Extractor::extract_m31(&hash); - assert_eq!(elem, M31::zero()); - - let script = script! { - { ExtractorGadget::push_hint_m31(&e) } - { hash.to_vec() } - { ExtractorGadget::unpack_m31() } - { elem } - OP_EQUAL - }; - let exec_result = execute_script(script); - println!("{:8}", exec_result.final_stack); - println!("{:?}", exec_result.error); - assert!(exec_result.success); - } - - #[test] - fn test_unpack_m31() { - let mut prng = ChaCha20Rng::seed_from_u64(0); - - let unpack_script = ExtractorGadget::unpack_m31(); - println!("M31.from_hash() = {} bytes", unpack_script.len()); - - let mut hash = [0u8; 32]; - for h in &mut hash { - *h = prng.gen(); - } - hash[3] |= 0x80; - - let (elem, e) = Extractor::extract_m31(&hash); - - let script = script! { - { ExtractorGadget::push_hint_m31(&e) } - { hash.to_vec() } - { unpack_script.clone() } - { elem } - OP_EQUAL - }; - let exec_result = execute_script(script); - assert!(exec_result.success); - - hash[3] = 0; - hash[2] &= 0x7f; - let (elem, e) = Extractor::extract_m31(&hash); - - let script = script! { - { ExtractorGadget::push_hint_m31(&e) } - { hash.to_vec() } - { unpack_script.clone() } - { elem } - OP_EQUAL - }; - let exec_result = execute_script(script); - assert!(exec_result.success); - - hash[2] = 0; - hash[1] &= 0x7f; - let (elem, e) = Extractor::extract_m31(&hash); - - let script = script! { - { ExtractorGadget::push_hint_m31(&e) } - { hash.to_vec() } - { unpack_script.clone() } - { elem } - OP_EQUAL - }; - let exec_result = execute_script(script); - assert!(exec_result.success); - - hash[1] = 0; - hash[0] &= 0x7f; - let (elem, e) = Extractor::extract_m31(&hash); - - let script = script! { - { ExtractorGadget::push_hint_m31(&e) } - { hash.to_vec() } - { unpack_script.clone() } - { elem } - OP_EQUAL - }; - let exec_result = execute_script(script); - assert!(exec_result.success); - - hash[0] = 0; - let (elem, e) = Extractor::extract_m31(&hash); - - let script = script! { - { ExtractorGadget::push_hint_m31(&e) } - { hash.to_vec() } - { unpack_script.clone() } - { elem } - OP_EQUAL - }; - let exec_result = execute_script(script); - assert!(exec_result.success); - - let mut hash = [0u8; 32]; - for h in &mut hash { - *h = prng.gen(); - } - hash[3] |= 0x80; - hash[2] = 0; - - let (elem, e) = Extractor::extract_m31(&hash); - - let script = script! { - { ExtractorGadget::push_hint_m31(&e) } - { hash.to_vec() } - { unpack_script.clone() } - { elem } - OP_EQUAL - }; - let exec_result = execute_script(script); - assert!(exec_result.success); - - let mut hash = [0u8; 32]; - hash[0] = 0xff; - hash[1] = 0xff; - hash[2] = 0xff; - hash[3] = 0x7f; - - let (elem, e) = Extractor::extract_m31(&hash); - - let script = script! { - { ExtractorGadget::push_hint_m31(&e) } - { hash.to_vec() } - { unpack_script.clone() } - { elem } - OP_EQUAL - }; - let exec_result = execute_script(script); - assert!(exec_result.success); - - let mut hash = [0u8; 32]; - hash[0] = 0x02; - hash[1] = 0x00; - hash[2] = 0x00; - hash[3] = 0x80; - - let (elem, e) = Extractor::extract_m31(&hash); - - let script = script! { - { ExtractorGadget::push_hint_m31(&e) } - { hash.to_vec() } - { unpack_script.clone() } - { elem } - OP_EQUAL - }; - let exec_result = execute_script(script); - assert!(exec_result.success); - } - - #[test] - fn test_unpack_cm31() { - let mut prng = ChaCha20Rng::seed_from_u64(0); - - let unpack_script = ExtractorGadget::unpack_cm31(); - println!("CM31.from_hash() = {} bytes", unpack_script.len()); - - for _ in 0..300 { - let mut hash = [0u8; 32]; - for h in &mut hash { - *h = prng.gen(); - } - - let (elem, e) = Extractor::extract_cm31(&hash); - - let script = script! { - { ExtractorGadget::push_hint_cm31(&e) } - { hash.to_vec() } - { unpack_script.clone() } - { elem } - OP_ROT OP_EQUALVERIFY - OP_EQUAL - }; - let exec_result = execute_script(script); - assert!(exec_result.success); - } - } - - #[test] - fn test_unpack_qm31() { - let mut prng = ChaCha20Rng::seed_from_u64(0); - - let unpack_script = ExtractorGadget::unpack_qm31(); - println!("QM31.from_hash() = {} bytes", unpack_script.len()); - - for _ in 0..300 { - let mut hash = [0u8; 32]; - for h in &mut hash { - *h = prng.gen(); - } - - let (elem, e) = Extractor::extract_qm31(&hash); - - let script = script! { - { ExtractorGadget::push_hint_qm31(&e) } - { hash.to_vec() } - { unpack_script.clone() } - { elem } - 4 OP_ROLL OP_EQUALVERIFY - 3 OP_ROLL OP_EQUALVERIFY - OP_ROT OP_EQUALVERIFY - OP_EQUAL - }; - let exec_result = execute_script(script); - assert!(exec_result.success); - } - } - - #[test] - fn test_unpack_5m31() { - let mut prng = ChaCha20Rng::seed_from_u64(0); - - let unpack_script = ExtractorGadget::unpack_5m31(); - println!("5M31.from_hash() = {} bytes", unpack_script.len()); - - for _ in 0..300 { - let mut hash = [0u8; 32]; - for h in &mut hash { - *h = prng.gen(); - } - - let (elem, e) = Extractor::extract_5m31(&hash); - - let script = script! { - { ExtractorGadget::push_hint_5m31(&e) } - { hash.to_vec() } - { unpack_script.clone() } - { elem[4] } OP_EQUALVERIFY - { elem[3] } OP_EQUALVERIFY - { elem[2] } OP_EQUALVERIFY - { elem[1] } OP_EQUALVERIFY - { elem[0] } OP_EQUAL - }; - let exec_result = execute_script(script); - assert!(exec_result.success); - } - } -} diff --git a/src/channel_extract/mod.rs b/src/channel_extract/mod.rs deleted file mode 100644 index 01c8bfc..0000000 --- a/src/channel_extract/mod.rs +++ /dev/null @@ -1,129 +0,0 @@ -use crate::treepp::pushable::{Builder, Pushable}; -use bitcoin::script::PushBytesBuf; -use core::ops::Neg; - -mod bitcoin_script; -use crate::math::{CM31, M31, QM31}; -pub use bitcoin_script::*; - -/// Basic hint structure for extracting a single qm31 element. -#[derive(Clone, Copy)] -pub enum ExtractorHint { - /// negative zero (will be represented by 0x80). - NegativeZero, - /// any Bitcoin integer other than the negative zero. - Other(i64), -} - -impl Pushable for ExtractorHint { - fn bitcoin_script_push(self, builder: Builder) -> Builder { - match self { - ExtractorHint::NegativeZero => builder.push_slice(PushBytesBuf::from([0x80])), - ExtractorHint::Other(v) => builder.push_int(v), - } - } -} - -/// An extractor for field elements. -pub struct Extractor; -impl Extractor { - fn extract_common(hash: &[u8]) -> (M31, ExtractorHint) { - let mut bytes = [0u8; 4]; - bytes.copy_from_slice(&hash[0..4]); - - let mut res = u32::from_le_bytes(bytes); - res &= 0x7fffffff; - - let hint = if bytes[3] & 0x80 != 0 { - if res == 0 { - ExtractorHint::NegativeZero - } else { - ExtractorHint::Other((res as i64).neg()) - } - } else { - ExtractorHint::Other(res as i64) - }; - - res = res.saturating_sub(1); - - (M31::from(res), hint) - } - - /// Extract a m31 element from a hash. - pub fn extract_m31(hash: &[u8; 32]) -> (M31, ExtractionM31) { - let (res, hint) = Self::extract_common(hash); - - let mut hint_bytes = [0u8; 28]; - hint_bytes.copy_from_slice(&hash[4..]); - - (res, ExtractionM31(hint, hint_bytes)) - } - - /// Extract a cm31 element from a hash. - pub fn extract_cm31(hash: &[u8; 32]) -> (CM31, ExtractionCM31) { - let (res_1, hint_1) = Self::extract_common(hash); - let (res_2, hint_2) = Self::extract_common(&hash[4..]); - - let mut hint_bytes = [0u8; 24]; - hint_bytes.copy_from_slice(&hash[8..]); - - ( - CM31(res_1, res_2), - ExtractionCM31((hint_1, hint_2), hint_bytes), - ) - } - - /// Extract a qm31 element from a hash. - pub fn extract_qm31(hash: &[u8; 32]) -> (QM31, ExtractionQM31) { - let (res_1, hint_1) = Self::extract_common(hash); - let (res_2, hint_2) = Self::extract_common(&hash[4..]); - let (res_3, hint_3) = Self::extract_common(&hash[8..]); - let (res_4, hint_4) = Self::extract_common(&hash[12..]); - - let mut hint_bytes = [0u8; 16]; - hint_bytes.copy_from_slice(&hash[16..]); - - ( - QM31(CM31(res_1, res_2), CM31(res_3, res_4)), - ExtractionQM31((hint_1, hint_2, hint_3, hint_4), hint_bytes), - ) - } - - /// Extract five m31 elements from a hash. - pub fn extract_5m31(hash: &[u8; 32]) -> ([M31; 5], Extraction5M31) { - let (res_1, hint_1) = Self::extract_common(hash); - let (res_2, hint_2) = Self::extract_common(&hash[4..]); - let (res_3, hint_3) = Self::extract_common(&hash[8..]); - let (res_4, hint_4) = Self::extract_common(&hash[12..]); - let (res_5, hint_5) = Self::extract_common(&hash[16..]); - - let mut hint_bytes = [0u8; 12]; - hint_bytes.copy_from_slice(&hash[20..]); - - ( - [res_1, res_2, res_3, res_4, res_5], - Extraction5M31((hint_1, hint_2, hint_3, hint_4, hint_5), hint_bytes), - ) - } -} - -/// Extraction hint for a m31 element. -pub struct ExtractionM31(pub ExtractorHint, pub [u8; 28]); -/// Extraction hint for a cm31 element. -pub struct ExtractionCM31(pub (ExtractorHint, ExtractorHint), pub [u8; 24]); -/// Extraction hint for a qm31 element. -pub struct ExtractionQM31( - pub (ExtractorHint, ExtractorHint, ExtractorHint, ExtractorHint), - pub [u8; 16], -); -/// Extraction hint for five m31 elements. -pub struct Extraction5M31( - pub ( - ExtractorHint, - ExtractorHint, - ExtractorHint, - ExtractorHint, - ExtractorHint, - ), - pub [u8; 12], -); diff --git a/src/circle/bitcoin_script.rs b/src/circle/bitcoin_script.rs deleted file mode 100644 index a4d17d3..0000000 --- a/src/circle/bitcoin_script.rs +++ /dev/null @@ -1,191 +0,0 @@ -use crate::circle::CirclePoint; -use crate::treepp::*; -use rust_bitcoin_m31::{m31_add, m31_mul, m31_neg, m31_sub}; - -/// Gadget for points on the circle curve over the m31 field. -/// This is not the secure field. -pub struct CirclePointGadget; - -impl CirclePointGadget { - /// Push a zero point. - pub fn zero() -> Script { - script! { - OP_PUSHNUM_1 - OP_PUSHBYTES_0 - } - } - - /// Push a constant point. - pub fn push(point: &CirclePoint) -> Script { - script! { - { point.x.0 } - { point.y.0 } - } - } - - /// Add two points. - pub fn add() -> Script { - script! { - 3 OP_PICK - 2 OP_PICK - m31_mul - 3 OP_PICK - 2 OP_PICK - m31_mul - 5 OP_ROLL - 5 OP_ROLL - m31_add - 4 OP_ROLL - 4 OP_ROLL - m31_add - m31_mul - OP_TOALTSTACK - OP_2DUP - m31_add - OP_FROMALTSTACK - OP_SWAP - m31_sub - OP_TOALTSTACK - m31_sub - OP_FROMALTSTACK - } - } - - /// Double the point. - pub fn double() -> Script { - script! { - OP_2DUP - { Self::add() } - } - } - - /// Double the point repeatedly for n times. - pub fn repeated_double(n: usize) -> Script { - script! { - for _ in 0..n { - { Self::double() } - } - } - } - - /// Negate a point. - pub fn conjugate() -> Script { - m31_neg() - } - - /// Subtract two points. - pub fn sub() -> Script { - script! { - { Self::conjugate() } - { Self::add() } - } - } - - /// Fail the execution if the two points are not equal. - pub fn equalverify() -> Script { - script! { - OP_ROT - OP_EQUALVERIFY - OP_EQUALVERIFY - } - } -} - -#[cfg(test)] -mod test { - use crate::circle::CirclePoint; - use crate::circle::CirclePointGadget; - use crate::math::M31; - use crate::treepp::*; - use rand_chacha::rand_core::{RngCore, SeedableRng}; - use rand_chacha::ChaCha20Rng; - use std::ops::{Add, Sub}; - - #[test] - fn test_double() { - let mut prng = ChaCha20Rng::seed_from_u64(0); - - let double_script = CirclePointGadget::double(); - println!("CirclePoint.double() = {} bytes", double_script.len()); - - for _ in 0..100 { - let a = CirclePoint { - x: M31::reduce(prng.next_u64()), - y: M31::reduce(prng.next_u64()), - }; - let b = a.double(); - - let script = script! { - { CirclePointGadget::push(&a) } - { double_script.clone() } - { CirclePointGadget::push(&b) } - { CirclePointGadget::equalverify() } - OP_TRUE - }; - let exec_result = execute_script(script); - assert!(exec_result.success); - } - } - - #[test] - fn test_add() { - let mut prng = ChaCha20Rng::seed_from_u64(0); - - let add_script = CirclePointGadget::add(); - println!("CirclePoint.add() = {} bytes", add_script.len()); - - for _ in 0..100 { - let a = CirclePoint { - x: M31::reduce(prng.next_u64()), - y: M31::reduce(prng.next_u64()), - }; - let b = CirclePoint { - x: M31::reduce(prng.next_u64()), - y: M31::reduce(prng.next_u64()), - }; - let c = a.add(b); - - let script = script! { - { CirclePointGadget::push(&a) } - { CirclePointGadget::push(&b) } - { add_script.clone() } - { CirclePointGadget::push(&c) } - { CirclePointGadget::equalverify() } - OP_TRUE - }; - let exec_result = execute_script(script); - assert!(exec_result.success); - } - } - - #[test] - fn test_sub() { - let mut prng = ChaCha20Rng::seed_from_u64(0); - - let sub_script = CirclePointGadget::sub(); - println!("CirclePoint.sub() = {} bytes", sub_script.len()); - - for _ in 0..100 { - let a = CirclePoint { - x: M31::reduce(prng.next_u64()), - y: M31::reduce(prng.next_u64()), - }; - let b = CirclePoint { - x: M31::reduce(prng.next_u64()), - y: M31::reduce(prng.next_u64()), - }; - let c = a.sub(b); - - let script = script! { - { CirclePointGadget::push(&a) } - { CirclePointGadget::push(&b) } - { sub_script.clone() } - { CirclePointGadget::push(&c) } - { CirclePointGadget::equalverify() } - OP_TRUE - }; - let exec_result = execute_script(script); - assert!(exec_result.success); - } - } -} diff --git a/src/circle/mod.rs b/src/circle/mod.rs deleted file mode 100644 index 817d357..0000000 --- a/src/circle/mod.rs +++ /dev/null @@ -1,97 +0,0 @@ -mod bitcoin_script; -pub use bitcoin_script::*; - -use std::ops::{Add, Neg, Sub}; - -use crate::math::M31; - -/// A point on the complex circle. Treated as an additive group. -#[derive(Copy, Clone, Debug, PartialEq, Eq, PartialOrd, Ord, Hash)] -pub struct CirclePoint { - /// x coordinate. - pub x: M31, - /// y coordinate. - pub y: M31, -} - -impl CirclePoint { - /// Push the zero point. - pub fn zero() -> Self { - Self { - x: 1.into(), - y: 0.into(), - } - } - - /// Double a point. - pub fn double(&self) -> Self { - *self + *self - } - - /// Multiply a point with a scalar. - pub fn mul(&self, mut scalar: u128) -> CirclePoint { - let mut res = Self::zero(); - let mut cur = *self; - while scalar > 0 { - if scalar & 1 == 1 { - res = res + cur; - } - cur = cur.double(); - scalar >>= 1; - } - res - } - - /// Double a point repeatedly for n times. - pub fn repeated_double(&self, n: usize) -> Self { - let mut res = *self; - for _ in 0..n { - res = res.double(); - } - res - } - - /// Negate a point. - pub fn conjugate(&self) -> CirclePoint { - Self { - x: self.x, - y: -self.y, - } - } - - /// Compute a subgroup generator for points on the circle curve over the m31 field. - pub fn subgroup_gen(logn: usize) -> Self { - M31_CIRCLE_GEN.repeated_double(M31_CIRCLE_LOG_ORDER - logn) - } -} -impl Add for CirclePoint { - type Output = Self; - - fn add(self, rhs: Self) -> Self::Output { - let x = self.x * rhs.x - self.y * rhs.y; - let y = self.x * rhs.y + self.y * rhs.x; - Self { x, y } - } -} -impl Neg for CirclePoint { - type Output = Self; - - fn neg(self) -> Self::Output { - self.conjugate() - } -} -impl Sub for CirclePoint { - type Output = Self; - - fn sub(self, rhs: Self) -> Self::Output { - self + (-rhs) - } -} - -/// The group order of the points on the circle curve over the m31 field. -pub const M31_CIRCLE_LOG_ORDER: usize = 31; -/// A generator of the circle curve over the m31 field. -pub const M31_CIRCLE_GEN: CirclePoint = CirclePoint { - x: M31(2), - y: M31(1268011823), -}; diff --git a/src/circle_secure/bitcoin_script.rs b/src/circle_secure/bitcoin_script.rs deleted file mode 100644 index 491b451..0000000 --- a/src/circle_secure/bitcoin_script.rs +++ /dev/null @@ -1,197 +0,0 @@ -use crate::treepp::*; -use rust_bitcoin_m31::{ - m31_add_n31, m31_sub, push_m31_one, push_n31_one, push_qm31_one, qm31_double, qm31_dup, - qm31_equalverify, qm31_from_bottom, qm31_mul, qm31_neg, qm31_roll, qm31_rot, qm31_square, - qm31_sub, qm31_swap, -}; -use std::ops::{Add, Mul, Neg}; - -use crate::{ - channel::ChannelGadget, - math::{Field, QM31}, -}; - -/// Gadget for points on the circle curve in the qm31 field. -pub struct CirclePointSecureGadget; - -impl CirclePointSecureGadget { - /// Double a point. - /// Rationale: cos(2*theta) = 2*cos(theta)^2-1 - /// - /// input: - /// x (QM31) - /// - /// output: - /// 2*x^2-1 (QM31) - pub fn double_x() -> Script { - script! { - qm31_square - qm31_double - push_qm31_one - qm31_sub - } - } - - /// Samples a random point over the projective line, see Lemma 1 in https://eprint.iacr.org/2024/278.pdf - /// - /// hint: - /// w - qm31 hint (5 elements) - /// - /// input: - /// x - (1-t^2)/(1+t^2), where t is extracted from channel (4 elements) - /// y - 2t/(1+t^2), where t is extracted from channel (4 elements) - /// channel - /// - /// output: - /// channel'=sha256(channel) - /// x - /// y - /// where (x,y) - random point on C(QM31) satisfying x^2+y^2=1 (8 elements) - pub fn get_random_point() -> Script { - script! { - { ChannelGadget::squeeze_qm31_using_hint() } - // stack: x, y, channel', t - - // compute t^2 from t - qm31_dup - qm31_square - - // compute t^2 - 1 - qm31_dup - push_m31_one - m31_sub // a trick - - // compute t^2 + 1 - qm31_swap - push_n31_one - m31_add_n31 - qm31_dup - - // stack: x, y, channel', t, t^2 - 1, t^2 + 1, t^2 + 1 - - // pull the hint x and verify - qm31_from_bottom - qm31_dup - qm31_rot - qm31_mul - qm31_neg - { qm31_roll(3) } - qm31_equalverify - - // stack: y, channel', t, t^2 + 1, x - - // pull the hint y - qm31_from_bottom - qm31_dup - { qm31_roll(3) } - qm31_mul - { qm31_roll(3) } - qm31_double - qm31_equalverify - } - } - - /// Push the hint for sampling a random circle curve point over qm31. - pub fn push_random_point_hint(t: QM31) -> Script { - let one_plus_tsquared_inv = t.square().add(QM31::one()).inverse(); - - script! { - { QM31::one().add(t.square().neg()).mul(one_plus_tsquared_inv) } // x = (1 - t^2) / (1 + t^2) - { t.double().mul(one_plus_tsquared_inv) } // y = 2t / (1 + t^2) - } - } -} - -#[cfg(test)] -mod test { - use std::ops::{Add, Mul, Neg}; - - use crate::treepp::*; - use rand::{Rng, RngCore, SeedableRng}; - use rand_chacha::ChaCha20Rng; - use rust_bitcoin_m31::qm31_equalverify; - - use crate::{ - channel::Channel, - channel_extract::ExtractorGadget, - circle_secure::bitcoin_script::CirclePointSecureGadget, - math::{Field, M31, QM31}, - }; - - #[test] - fn test_double_x() { - let double_x_script = CirclePointSecureGadget::double_x(); - println!( - "CirclePointSecure.double_x() = {} bytes", - double_x_script.len() - ); - - for seed in 0..20 { - let mut prng = ChaCha20Rng::seed_from_u64(seed); - - let a = QM31::from_m31( - M31::reduce(prng.next_u64()), - M31::reduce(prng.next_u64()), - M31::reduce(prng.next_u64()), - M31::reduce(prng.next_u64()), - ); - let double_a = a.square().double().add(QM31::one().neg()); - - let script = script! { - { a } - { double_x_script.clone() } - { double_a } - qm31_equalverify - OP_TRUE - }; - let exec_result = execute_script(script); - assert!(exec_result.success); - } - } - - #[test] - fn test_get_random_point() { - let mut prng = ChaCha20Rng::seed_from_u64(0); - - let get_random_point_script = CirclePointSecureGadget::get_random_point(); - println!( - "CirclePointSecure.get_random_point() = {} bytes", - get_random_point_script.len() - ); - - let mut a = [0u8; 32]; - a.iter_mut().for_each(|v| *v = prng.gen()); - - let mut channel = Channel::new(a); - let (t, hint_t) = channel.draw_qm31(); - - let c = channel.state; - - let x = t - .square() - .add(QM31::one()) - .inverse() - .mul(QM31::one().add(t.square().neg())); //(1+t^2)^-1 * (1-t^2) - let y = t - .square() - .add(QM31::one()) - .inverse() - .mul(QM31::one().double().mul(t)); // (1+t^2)^-1 * 2 * t - - let script = script! { - { ExtractorGadget::push_hint_qm31(&hint_t) } - { CirclePointSecureGadget::push_random_point_hint(t) } - { a.to_vec() } - { get_random_point_script.clone() } - { y } // check y - qm31_equalverify - { x } // check x - qm31_equalverify - { c.to_vec() } // check channel' - OP_EQUALVERIFY // checking that indeed channel' = sha256(channel) - OP_TRUE - }; - let exec_result = execute_script(script); - assert!(exec_result.success); - } -} diff --git a/src/circle_secure/mod.rs b/src/circle_secure/mod.rs deleted file mode 100644 index b3f4459..0000000 --- a/src/circle_secure/mod.rs +++ /dev/null @@ -1,2 +0,0 @@ -mod bitcoin_script; -pub use bitcoin_script::*; diff --git a/src/constraints/bitcoin_script.rs b/src/constraints/bitcoin_script.rs deleted file mode 100644 index c6888d0..0000000 --- a/src/constraints/bitcoin_script.rs +++ /dev/null @@ -1,122 +0,0 @@ -use crate::treepp::*; -use rust_bitcoin_m31::{qm31_add, qm31_mul, qm31_swap}; -use std::ops::{Add, Mul, Neg}; - -use crate::math::QM31; - -/// Gadget for constraints over the circle curve -pub struct ConstraintsGadget; - -impl ConstraintsGadget { - /// Evaluates a polynomial P : CirclePointSecure -> QM31 that vanishes at excluded0 and excluded1 - /// - /// input: - /// z.x (QM31) - /// z.y (QM31) - /// - /// output: - /// P(z) - pub fn pair_vanishing( - excluded0x: QM31, - excluded0y: QM31, - excluded1x: QM31, - excluded1y: QM31, - ) -> Script { - script! { - { excluded1x.add(excluded0x.neg()) } - qm31_mul //(excluded1.x - excluded0.x) * z.y - - qm31_swap - { excluded0y.add(excluded1y.neg()) } - qm31_mul //(excluded0.y - excluded1.y) * z.x - - qm31_add - { excluded0x.mul(excluded1y).add(excluded0y.mul(excluded1x).neg())} - qm31_add - //(excluded0.y - excluded1.y) * z.x - // + (excluded1.x - excluded0.x) * z.y - // + (excluded0.x * excluded1.y - excluded0.y * excluded1.x) - } - } -} - -#[cfg(test)] -mod test { - use std::ops::{Add, Mul, Neg}; - - use crate::{constraints::ConstraintsGadget, treepp::*}; - use rand::{RngCore, SeedableRng}; - use rand_chacha::ChaCha20Rng; - use rust_bitcoin_m31::qm31_equalverify; - - use crate::math::{M31, QM31}; - - #[test] - fn test_pair_vanishing() { - for seed in 0..20 { - let mut prng = ChaCha20Rng::seed_from_u64(seed); - - let zx = QM31::from_m31( - M31::reduce(prng.next_u64()), - M31::reduce(prng.next_u64()), - M31::reduce(prng.next_u64()), - M31::reduce(prng.next_u64()), - ); - - let zy = QM31::from_m31( - M31::reduce(prng.next_u64()), - M31::reduce(prng.next_u64()), - M31::reduce(prng.next_u64()), - M31::reduce(prng.next_u64()), - ); - - let e0x = QM31::from_m31( - M31::reduce(prng.next_u64()), - M31::reduce(prng.next_u64()), - M31::reduce(prng.next_u64()), - M31::reduce(prng.next_u64()), - ); - - let e0y = QM31::from_m31( - M31::reduce(prng.next_u64()), - M31::reduce(prng.next_u64()), - M31::reduce(prng.next_u64()), - M31::reduce(prng.next_u64()), - ); - - let e1x = QM31::from_m31( - M31::reduce(prng.next_u64()), - M31::reduce(prng.next_u64()), - M31::reduce(prng.next_u64()), - M31::reduce(prng.next_u64()), - ); - - let e1y = QM31::from_m31( - M31::reduce(prng.next_u64()), - M31::reduce(prng.next_u64()), - M31::reduce(prng.next_u64()), - M31::reduce(prng.next_u64()), - ); - - //(excluded0.y - excluded1.y) * z.x - // + (excluded1.x - excluded0.x) * z.y - // + (excluded0.x * excluded1.y - excluded0.y * excluded1.x) - let res = e0y - .add(e1y.neg()) - .mul(zx) - .add(e1x.add(e0x.neg()).mul(zy)) - .add(e0x.mul(e1y).add(e0y.mul(e1x).neg())); - - let script = script! { - { zx } - { zy } - { ConstraintsGadget::pair_vanishing(e0x,e0y,e1x,e1y) } - { res } - qm31_equalverify - OP_TRUE - }; - let exec_result = execute_script(script); - assert!(exec_result.success); - } - } -} diff --git a/src/constraints/mod.rs b/src/constraints/mod.rs deleted file mode 100644 index b3f4459..0000000 --- a/src/constraints/mod.rs +++ /dev/null @@ -1,2 +0,0 @@ -mod bitcoin_script; -pub use bitcoin_script::*; diff --git a/src/fri/bitcoin_script.rs b/src/fri/bitcoin_script.rs deleted file mode 100644 index 158606c..0000000 --- a/src/fri/bitcoin_script.rs +++ /dev/null @@ -1,735 +0,0 @@ -use crate::channel::{Channel, ChannelGadget}; -use crate::channel_extract::{ExtractionQM31, ExtractorGadget}; -use crate::fri::{FriProof, N_QUERIES}; -use crate::math::FFTGadget; -use crate::merkle_tree::MerkleTreeGadget; -use crate::treepp::*; -use crate::twiddle_merkle_tree::TwiddleMerkleTreeGadget; -use crate::utils::copy_to_altstack_top_item_first_in; -use crate::utils::{limb_to_be_bits, limb_to_be_bits_toaltstack}; -use rust_bitcoin_m31::{ - qm31_add, qm31_equalverify, qm31_fromaltstack, qm31_mul, qm31_roll, qm31_swap, qm31_toaltstack, -}; - -/// Gadget for FRI. -pub struct FRIGadget; - -impl FRIGadget { - /// Push the hints for Fiat-Shamir. - pub fn push_fiat_shamir_hints(channel: &mut Channel, logn: usize, proof: &FriProof) -> Script { - let mut factors_hints = Vec::::new(); - - for c in proof.commitments.iter() { - channel.absorb_commitment(c); - let res = channel.draw_qm31(); - factors_hints.push(res.1); - } - proof.last_layer.iter().for_each(|v| channel.absorb_qm31(v)); - - let res = channel.draw_5queries(logn); - let queries_hint = res.1; - - script! { - for hint in factors_hints.iter() { - { ExtractorGadget::push_hint_qm31(hint) } - } - { ExtractorGadget::push_hint_5m31(&queries_hint) } - } - } - - /// Check the Fiat-Shamir computation. - pub fn check_fiat_shamir( - channel_init_state: &[u8; 32], - logn: usize, - n_layers: usize, - ) -> Script { - let n_last_layer = 1 << (logn - n_layers); - script! { - { channel_init_state.to_vec() } - - for _ in 0..n_layers { - { ChannelGadget::absorb_commitment() } - { ChannelGadget::squeeze_qm31_using_hint() } - qm31_toaltstack - } - - for _ in 0..n_last_layer { - { ChannelGadget::absorb_qm31() } - } - - { ChannelGadget::squeeze_5queries_using_hint(logn) } - - // remove the channel - 5 OP_ROLL OP_DROP - - for _ in 0..n_layers { - qm31_fromaltstack - } - } - } - - /// Push all the twiddle Merkle tree proofs. - pub fn push_twiddle_merkle_tree_proof(fri_proof: &FriProof) -> Script { - script! { - for proof in fri_proof.twiddle_merkle_proofs.iter() { - { TwiddleMerkleTreeGadget::push_twiddle_merkle_tree_proof(proof) } - } - } - } - - /// Check all the twiddle Merkle tree proofs. - /// - /// hint: twiddle proof * 5 (as hints) - /// input: pos * 5 - /// output: leaves * 5 - pub fn check_twiddle_merkle_tree_proof( - logn: usize, - twiddle_merkle_tree_root: [u8; 32], - ) -> Script { - script! { - for _ in 0..N_QUERIES { - OP_TOALTSTACK - } - - for _ in 0..N_QUERIES { - { twiddle_merkle_tree_root.to_vec() } - OP_FROMALTSTACK - { TwiddleMerkleTreeGadget::query_and_verify(logn) } - } - } - } - - /// Push the several Merkle tree proofs for a specific query. - pub fn push_single_query_merkle_tree_proof(idx: usize, fri_proof: &FriProof) -> Script { - script! { - for proof in fri_proof.merkle_proofs[idx].iter() { - { proof.leaf } - - for elem in proof.siblings.iter() { - { elem.to_vec() } - } - } - } - } - - /// Check the Merkle tree proofs for each query. - /// - /// hints: - /// proofs (as hints, larger trees at the beginning) - /// input: - /// roots (as inputs, smaller trees at the beginning), - /// query - /// - /// output: - /// elems - pub fn check_single_query_merkle_tree_proof(logn: usize) -> Script { - script! { - // convert query into bits - { limb_to_be_bits(logn as u32) } - - // for each of the logn proofs - for i in (2..=logn).rev() { - // copy the bits - { copy_to_altstack_top_item_first_in(i) } - - // copy the root - { logn } OP_ROLL - - { MerkleTreeGadget::query_and_verify_internal(i, true) } - - qm31_toaltstack - } - - // drop the bits - for _ in 0..(logn/2) { - OP_2DROP - } - - if logn % 2 == 1 { - OP_DROP - } - - // recover all the elements - for _ in (2..=logn).rev() { - qm31_fromaltstack - } - } - } - - /// Push the last layer elements from the FRI proof. - pub fn push_last_layer(fri_proof: &FriProof) -> Script { - script! { - for elem in fri_proof.last_layer.iter().rev() { - { *elem } - } - } - } - - /// Check the ibutterfly stage for one single query. - /// - /// input: - /// last_layer (as a given offset) - /// - /// twiddle factors (logn - 1) m31 - /// alphas (logn - 1) qm31 - /// siblings (logn - 1) qm31 - /// leaf qm31 - /// pos - /// - /// output: - /// none - /// mark the transaction as invalid if the check fails - pub fn check_single_query_ibutterfly(logn: usize, last_layer_offset: usize) -> Script { - script! { - { limb_to_be_bits_toaltstack(logn as u32) } - - for i in 1..logn { - // the top element is right, the second-to-top element is left - OP_FROMALTSTACK - OP_NOTIF - qm31_swap - OP_ENDIF - - // pull the twiddle factor - { 4 * (1 + (logn - i) * 2) } OP_ROLL - - // ibutterfly - { FFTGadget::ibutterfly() } - - // pull the alpha - { qm31_roll(1 + (logn - i)) } - - // mul - qm31_mul - - // add - qm31_add - } - - // only work for last layer with 2 elements - { last_layer_offset - 4 + 4 + 1 } - OP_FROMALTSTACK - OP_NOTIF - 4 OP_SUB - OP_ENDIF - - OP_DUP OP_PICK OP_TOALTSTACK - OP_1ADD OP_DUP OP_PICK OP_TOALTSTACK - OP_1ADD OP_DUP OP_PICK OP_TOALTSTACK - OP_PICK - OP_FROMALTSTACK OP_FROMALTSTACK OP_FROMALTSTACK - - qm31_equalverify - } - } -} - -#[cfg(test)] -mod test { - use crate::channel::Channel; - use crate::circle::CirclePoint; - use crate::fri; - use crate::fri::{FRIGadget, N_QUERIES}; - use crate::math::Field; - use crate::treepp::*; - use crate::twiddle_merkle_tree::{TwiddleMerkleTree, TWIDDLE_MERKLE_TREE_ROOT_18}; - use crate::utils::permute_eval; - use bitcoin::hashes::Hash; - use bitcoin::{TapLeafHash, Transaction}; - use bitcoin_scriptexec::{Exec, ExecCtx, Experimental, Options, TxTemplate}; - use rand::{Rng, SeedableRng}; - use rand_chacha::ChaCha20Rng; - use rust_bitcoin_m31::qm31_equalverify; - - #[test] - fn test_fiat_shamir() { - let channel_init_state = { - let mut prng = ChaCha20Rng::seed_from_u64(0); - - let mut channel_init_state = [0u8; 32]; - channel_init_state.iter_mut().for_each(|v| *v = prng.gen()); - channel_init_state - }; - - let mut channel = Channel::new(channel_init_state); - let logn = 19; - - let proof = { - let p = CirclePoint::subgroup_gen(logn + 1); - - let mut prng = ChaCha20Rng::seed_from_u64(0); - - let mut channel_init_state = [0u8; 32]; - channel_init_state.iter_mut().for_each(|v| *v = prng.gen()); - - let evaluation = (0..(1 << logn)) - .map(|i| (p.mul(i * 2 + 1).x.square().square() + 1.into()).into()) - .collect(); - let evaluation = permute_eval(evaluation); - - fri::fri_prove(&mut Channel::new(channel_init_state), evaluation) - }; - - let expected = { - let mut channel = Channel::new(channel_init_state); - let mut expected_1 = vec![]; - - for c in proof.commitments.iter() { - channel.absorb_commitment(c); - let res = channel.draw_qm31(); - expected_1.push(res.0); - } - proof.last_layer.iter().for_each(|v| channel.absorb_qm31(v)); - - let res = channel.draw_5queries(logn); - - let expected_2 = res.0; - - (expected_1, expected_2) - }; - - let script = script! { - { FRIGadget::push_fiat_shamir_hints(&mut channel, logn, &proof) } - - for elem in proof.last_layer.iter().rev() { - { *elem } - } - for c in proof.commitments.iter().rev() { - { c.clone() } - } - - { FRIGadget::check_fiat_shamir(&channel_init_state, logn, logn - 1) } - for elem in expected.0.iter() { - { *elem } - qm31_equalverify - } - for elem in expected.1.iter().rev() { - { *elem } - OP_EQUALVERIFY - } - OP_TRUE - }; - - println!("FRI.Fiat-Shamir = {} bytes", script.len()); - - let exec_result = execute_script(script); - assert!(exec_result.success); - } - - #[test] - fn test_twiddle_merkle_tree() { - let logn = 19; - - let mut prng = ChaCha20Rng::seed_from_u64(0); - let mut channel_init_state = [0u8; 32]; - channel_init_state.iter_mut().for_each(|v| *v = prng.gen()); - - let proof = { - let p = CirclePoint::subgroup_gen(logn + 1); - - let evaluation = (0..(1 << logn)) - .map(|i| (p.mul(i * 2 + 1).x.square().square() + 1.into()).into()) - .collect(); - let evaluation = permute_eval(evaluation); - - fri::fri_prove(&mut Channel::new(channel_init_state), evaluation) - }; - - let queries = { - let mut channel = Channel::new(channel_init_state); - - for c in proof.commitments.iter() { - channel.absorb_commitment(c); - let _ = channel.draw_qm31(); - } - - proof.last_layer.iter().for_each(|v| channel.absorb_qm31(v)); - channel.draw_5queries(logn).0 - }; - - let expected = { - let mut expected = vec![]; - - let twiddle_tree = TwiddleMerkleTree::new(logn - 1); - - for query in queries.iter() { - expected.extend_from_slice(&twiddle_tree.query(*query).elements); - } - expected - }; - - let script = script! { - { FRIGadget::push_twiddle_merkle_tree_proof(&proof) } - for query in queries.iter() { - { *query } - } - { FRIGadget::check_twiddle_merkle_tree_proof(logn, TWIDDLE_MERKLE_TREE_ROOT_18) } - for elem in expected.iter().rev() { - { *elem } - OP_EQUALVERIFY - } - OP_TRUE - }; - - println!("FRI.Twiddle-Tree = {} bytes", script.len()); - - let exec_result = execute_script(script); - println!("{:8}", exec_result.final_stack); - println!("{:?}", exec_result.error); - assert!(exec_result.success); - } - - #[test] - fn test_single_query_merkle_tree() { - let logn = 19; - - let mut prng = ChaCha20Rng::seed_from_u64(0); - let mut channel_init_state = [0u8; 32]; - channel_init_state.iter_mut().for_each(|v| *v = prng.gen()); - - let proof = { - let p = CirclePoint::subgroup_gen(logn + 1); - - let evaluation = (0..(1 << logn)) - .map(|i| (p.mul(i * 2 + 1).x.square().square() + 1.into()).into()) - .collect(); - let evaluation = permute_eval(evaluation); - - fri::fri_prove(&mut Channel::new(channel_init_state), evaluation) - }; - - let queries = { - let mut channel = Channel::new(channel_init_state); - - for c in proof.commitments.iter() { - channel.absorb_commitment(c); - let _ = channel.draw_qm31(); - } - - proof.last_layer.iter().for_each(|v| channel.absorb_qm31(v)); - channel.draw_5queries(logn).0 - }; - - let expected = { - let mut expected = vec![]; - - for query in proof.merkle_proofs[0].iter().rev() { - expected.push(query.leaf); - } - expected - }; - - let script = script! { - { FRIGadget::push_single_query_merkle_tree_proof(0, &proof) } - for c in proof.commitments.iter().rev() { - { c.clone() } - } - { queries[0] } - { FRIGadget::check_single_query_merkle_tree_proof(logn) } - for elem in expected.iter().rev() { - { *elem } - qm31_equalverify - } - OP_TRUE - }; - - println!("FRI.Single-Query-Tree = {} bytes", script.len()); - - let exec_result = execute_script(script); - assert!(exec_result.success); - } - - #[test] - fn test_single_query_butterfly() { - let logn = 19; - - let mut prng = ChaCha20Rng::seed_from_u64(0); - let mut channel_init_state = [0u8; 32]; - channel_init_state.iter_mut().for_each(|v| *v = prng.gen()); - - let proof = { - let p = CirclePoint::subgroup_gen(logn + 1); - - let evaluation = (0..(1 << logn)) - .map(|i| (p.mul(i * 2 + 1).x.square().square() + 1.into()).into()) - .collect(); - let evaluation = permute_eval(evaluation); - - fri::fri_prove(&mut Channel::new(channel_init_state), evaluation) - }; - - let (alphas, queries) = { - let mut alphas = vec![]; - - let mut channel = Channel::new(channel_init_state); - - for c in proof.commitments.iter() { - channel.absorb_commitment(c); - let res = channel.draw_qm31(); - alphas.push(res.0); - } - - proof.last_layer.iter().for_each(|v| channel.absorb_qm31(v)); - - let queries = channel.draw_5queries(logn).0; - - (alphas, queries) - }; - - // last_layer (as hints, last elem first, assuming 2 elements) - // twiddle factors (logn - 1) m31 - // alphas (logn - 1) qm31 - // siblings (logn - 1) qm31 - // leaf qm31 - // pos - - let script = script! { - { FRIGadget::push_last_layer(&proof) } - for elem in proof.twiddle_merkle_proofs[0].elements.iter() { - { *elem } - } - for elem in alphas.iter().rev() { - { *elem } - } - for elem in proof.merkle_proofs[0].iter().rev() { - { elem.leaf } - } - { proof.leaves[0] } - { queries[0] } - { FRIGadget::check_single_query_ibutterfly(logn, proof.last_layer.len() * 4) } - - { proof.last_layer[0] } - qm31_equalverify - - { proof.last_layer[1] } - qm31_equalverify - - OP_TRUE - }; - - println!("FRI.Single-Query-Butterfly = {} bytes", script.len()); - - let exec_result = execute_script(script); - assert!(exec_result.success); - } - - #[test] - fn test_end_to_end() { - let channel_init_state = { - let mut prng = ChaCha20Rng::seed_from_u64(0); - - let mut channel_init_state = [0u8; 32]; - channel_init_state.iter_mut().for_each(|v| *v = prng.gen()); - channel_init_state - }; - - let mut channel = Channel::new(channel_init_state); - let logn = 19; - - let proof = { - let p = CirclePoint::subgroup_gen(logn + 1); - - let mut prng = ChaCha20Rng::seed_from_u64(0); - - let mut channel_init_state = [0u8; 32]; - channel_init_state.iter_mut().for_each(|v| *v = prng.gen()); - - let evaluation = (0..(1 << logn)) - .map(|i| (p.mul(i * 2 + 1).x.square().square() + 1.into()).into()) - .collect(); - let evaluation = permute_eval(evaluation); - - fri::fri_prove(&mut Channel::new(channel_init_state), evaluation) - }; - - let expected_fiat_shamir = { - let mut channel = Channel::new(channel_init_state); - let mut expected_1 = vec![]; - - for c in proof.commitments.iter() { - channel.absorb_commitment(c); - let res = channel.draw_qm31(); - expected_1.push(res.0); - } - proof.last_layer.iter().for_each(|v| channel.absorb_qm31(v)); - - let res = channel.draw_5queries(logn); - - let expected_2 = res.0; - - (expected_1, expected_2) - }; - - let expected_twiddle_tree = { - let mut expected = vec![]; - - let twiddle_tree = TwiddleMerkleTree::new(logn - 1); - - for query in expected_fiat_shamir.1.iter() { - expected.extend_from_slice(&twiddle_tree.query(*query).elements); - } - expected - }; - - let witness = script! { - // push all the hints - { FRIGadget::push_fiat_shamir_hints(&mut channel, logn, &proof) } - { FRIGadget::push_twiddle_merkle_tree_proof(&proof) } - for i in 0..N_QUERIES { - { FRIGadget::push_single_query_merkle_tree_proof(i, &proof) } - } - - // push the proof body - - // leaves - for elem in proof.leaves.iter().rev() { - { *elem } - } - // last layer - for elem in proof.last_layer.iter().rev() { - { *elem } - } - // commitments - for c in proof.commitments.iter().rev() { - { c.clone() } - } - }; - - let script = script! { - // copy the input for check_fiat_shamir - for _ in 0..(proof.last_layer.len() * 4 + proof.commitments.len()) { - { proof.last_layer.len() * 4 + proof.commitments.len() - 1 } OP_PICK - } - - // do the check_fiat_shamir - { FRIGadget::check_fiat_shamir(&channel_init_state, logn, logn - 1) } - - // stack: - // proof body -- leaves (n_queries qm31), last layer (some qm31), commitments (logn - 1) - // 5 queries - // factors (logn - 1) qm31 - - // copy the input for check_twiddle_merkle_tree_proof - for _ in 0..5 { - { 5 + (logn - 1) * 4 - 1 } OP_PICK - } - - { FRIGadget::check_twiddle_merkle_tree_proof(logn, TWIDDLE_MERKLE_TREE_ROOT_18) } - - // stack: - // proof body -- leaves (n_queries qm31), last layer (some qm31), commitments (logn - 1) - // 5 queries - // alphas (logn - 1) qm31 - // twiddle factors 5 * (logn - 1) m31 - - // now handle the 1st query, start with the Merkle trees to obtain the siblings - for i in 0..N_QUERIES { - // copy the input for check_single_query_merkle_tree - for _ in 0..logn - 1 { - { 5 * (logn - 1) + (logn - 1) * 4 + 5 + (logn - 1) - 1 } OP_PICK - } - - // copy the query - { (logn - 1) + 5 * (logn - 1) + (logn - 1) * 4 + 4 - i } OP_PICK - - { FRIGadget::check_single_query_merkle_tree_proof(logn) } - - // stack: - // proof body -- leaves (n_queries qm31), last layer (some qm31), commitments (logn - 1) - // 5 queries - // alphas (logn - 1) qm31 - // twiddle factors 5 * (logn - 1) m31 - // siblings (logn - 1) qm31 - - // copy the input for check - // move siblings to alt stack - for _ in 0..(logn - 1) * 4 { - OP_TOALTSTACK - } - // twiddle factors - for _ in 0..(logn - 1) { - { (4 - i) * (logn - 1) + (logn - 1) - 1 } OP_PICK - } - // alphas - for _ in 0..(logn - 1) * 4 { - { (logn - 1) + 5 * (logn - 1) + (logn - 1) * 4 - 1 } OP_PICK - } - // siblings - for _ in 0..(logn - 1) * 4 { - OP_FROMALTSTACK - } - // leaf - for _ in 0..4 { - { proof.last_layer.len() * 4 + (logn - 1) * (4 + 4 + 4 + 1) + (5 + 1) * (logn - 1) + 5 + 4 - 1 } OP_ROLL - } - // position - { (logn - 1) * (4 + 4 + 1 + 4 + 5) + 4 + (4 - i) } OP_PICK - - { FRIGadget::check_single_query_ibutterfly(logn, (5 + 4 + 1) * (logn - 1) + 5 + proof.last_layer.len() * 4) } - - // stack: - // proof body -- leaves (n_queries - i qm31, disappearing), last layer (some qm31), commitments (logn - 1) - // 5 queries - // alphas (logn - 1) qm31 - // twiddle factors 5 * (logn - 1) m31 - } - - for elem in expected_twiddle_tree.iter().rev() { - { *elem } - OP_EQUALVERIFY - } - for elem in expected_fiat_shamir.0.iter() { - { *elem } - qm31_equalverify - } - for elem in expected_fiat_shamir.1.iter().rev() { - { *elem } - OP_EQUALVERIFY - } - - // drop last layer, and commitments - for _ in 0..((proof.last_layer.len()) * 4 + proof.commitments.len()) { - OP_DROP - } - - OP_TRUE - }; - - println!("script length: {}", script.len()); - - let mut exec = Exec::new( - ExecCtx::Tapscript, - Options { - require_minimal: true, - verify_cltv: true, - verify_csv: true, - verify_minimal_if: true, - enforce_stack_size_limit: false, - experimental: Experimental { op_cat: true }, - }, - TxTemplate { - tx: Transaction { - version: bitcoin::transaction::Version::TWO, - lock_time: bitcoin::locktime::absolute::LockTime::ZERO, - input: vec![], - output: vec![], - }, - prevouts: vec![], - input_idx: 0, - taproot_annex_scriptleaf: Some((TapLeafHash::all_zeros(), None)), - }, - script, - convert_to_witness(witness).unwrap(), - ) - .expect("error creating exec"); - - loop { - if exec.exec_next().is_err() { - break; - } - } - let res = exec.result().unwrap(); - println!("max stack size: {}", exec.stats().max_nb_stack_items); - assert!(res.success); - } -} diff --git a/src/fri/mod.rs b/src/fri/mod.rs deleted file mode 100644 index dfae617..0000000 --- a/src/fri/mod.rs +++ /dev/null @@ -1,159 +0,0 @@ -use crate::channel::Channel; -use crate::channel_commit::Commitment; -use crate::math::fft::{get_twiddles, ibutterfly}; -use crate::math::{Field, QM31}; -use crate::merkle_tree::{MerkleTree, MerkleTreeProof}; -use crate::twiddle_merkle_tree::{TwiddleMerkleTree, TwiddleMerkleTreeProof}; - -mod bitcoin_script; -pub use bitcoin_script::*; - -/// A FRI proof. -#[derive(Clone, Debug)] -pub struct FriProof { - commitments: Vec, - last_layer: Vec, - leaves: Vec, - merkle_proofs: Vec>, - twiddle_merkle_proofs: Vec, -} - -const N_QUERIES: usize = 5; // cannot change. hardcoded in the Channel implementation - -/// Generate a FRI proof. -pub fn fri_prove(channel: &mut Channel, evaluation: Vec) -> FriProof { - let logn = evaluation.len().ilog2() as usize; - let n_layers = logn - 1; - let twiddles = get_twiddles(logn); - - let mut layers = Vec::with_capacity(n_layers); - let mut trees = Vec::with_capacity(n_layers); - let mut layer = evaluation; - - // Commit. - let mut commitments = Vec::with_capacity(n_layers); - for layer_twiddles in twiddles.iter().take(n_layers) { - layers.push(layer.clone()); - - let tree = MerkleTree::new(layer.clone()); - - let commitment = Commitment(tree.root_hash); - channel.absorb_commitment(&commitment); - commitments.push(commitment); - - trees.push(tree); - - let (alpha, _) = channel.draw_qm31(); - - layer = layer - .chunks_exact(2) - .zip(layer_twiddles) - .map(|(f, twid)| { - let (mut f0, mut f1) = (f[0], f[1]); - ibutterfly(&mut f0, &mut f1, twid.inverse().into()); - f0 + alpha * f1 - }) - .collect(); - } - - // Last layer. - let last_layer = layer; - last_layer.iter().for_each(|v| channel.absorb_qm31(v)); - - // Queries. - let queries = channel.draw_5queries(logn).0.to_vec(); - - // Decommit. - let mut leaves = Vec::with_capacity(N_QUERIES); - let mut merkle_proofs = Vec::with_capacity(N_QUERIES); - let mut twiddle_merkle_proofs = Vec::with_capacity(N_QUERIES); - - let twiddle_merkle_tree = TwiddleMerkleTree::new(n_layers); - - for mut query in queries { - leaves.push(layers[0][query]); - twiddle_merkle_proofs.push(twiddle_merkle_tree.query(query)); - let mut layer_decommitments = Vec::with_capacity(n_layers); - for tree in trees.iter() { - layer_decommitments.push(tree.query(query ^ 1)); - query >>= 1; - } - merkle_proofs.push(layer_decommitments); - } - FriProof { - commitments, - last_layer, - leaves, - merkle_proofs, - twiddle_merkle_proofs, - } -} - -/// Verify the FRI proof. -pub fn fri_verify( - channel: &mut Channel, - logn: usize, - proof: FriProof, - twiddle_merkle_tree_root: [u8; 32], -) { - let n_layers = logn - 1; - - // Draw factors. - let mut factors = Vec::with_capacity(n_layers); - for c in proof.commitments.iter() { - channel.absorb_commitment(c); - factors.push(channel.draw_qm31().0); - } - // Last layer. - proof.last_layer.iter().for_each(|v| channel.absorb_qm31(v)); - // Check it's of half degree. - assert_eq!(proof.last_layer[0], proof.last_layer[1]); - // Queries. - let queries = channel.draw_5queries(logn).0.to_vec(); - // Decommit. - for (mut query, ((mut leaf, merkle_proof), twiddle_merkle_tree_proof)) in - queries.iter().copied().zip( - proof - .leaves - .iter() - .copied() - .zip(proof.merkle_proofs.iter()) - .zip(proof.twiddle_merkle_proofs.iter()), - ) - { - assert!(TwiddleMerkleTree::verify( - twiddle_merkle_tree_root, - logn - 1, - twiddle_merkle_tree_proof, - query - )); - for (i, (eval_proof, &alpha)) in merkle_proof.iter().zip(factors.iter()).enumerate() { - assert!(MerkleTree::verify( - proof.commitments[i].0, - logn - i, - &merkle_proof[i], - query ^ 1 - )); - - let sibling = eval_proof.leaf; - - let (mut f0, mut f1) = if query & 1 == 0 { - (leaf, sibling) - } else { - (sibling, leaf) - }; - - ibutterfly( - &mut f0, - &mut f1, - twiddle_merkle_tree_proof.elements[n_layers - 1 - i].into(), - ); - - leaf = f0 + alpha * f1; - - query >>= 1; - } - // Check against last layer - assert_eq!(leaf, proof.last_layer[query]); - } -} diff --git a/src/lib.rs b/src/lib.rs deleted file mode 100644 index c657fc7..0000000 --- a/src/lib.rs +++ /dev/null @@ -1,100 +0,0 @@ -//! The bitcoin-circle-stark crate implements a number of Bitcoin script gadgets for -//! a stwo proof verifier. - -#![deny(missing_docs)] - -use crate::treepp::pushable::{Builder, Pushable}; -use math::{CM31, M31, QM31}; - -/// Module for absorbing and squeezing of the channel. -pub mod channel; -/// Module for committing data. -pub mod channel_commit; -/// Module for extracting elements from a channel. -pub mod channel_extract; -/// Module for the circle curve over the m31 field. -pub mod circle; -/// Module for the circle curve over the qm31 field. -pub mod circle_secure; -/// Module for constraints over the circle curve -pub mod constraints; -/// Module for FRI. -pub mod fri; -/// Module for the field and group arithmetics. -pub mod math; -/// Module for the Merkle tree. -pub mod merkle_tree; -/// Module for PoW. -pub mod pow; -/// Module for the twiddle Merkle tree. -pub mod twiddle_merkle_tree; -/// Module for utility functions. -pub mod utils; - -pub(crate) mod treepp { - pub use bitcoin_script::{define_pushable, script}; - #[cfg(test)] - pub use bitcoin_scriptexec::{convert_to_witness, execute_script}; - - define_pushable!(); - pub use bitcoin::ScriptBuf as Script; -} - -impl Pushable for M31 { - fn bitcoin_script_push(self, builder: Builder) -> Builder { - self.0.bitcoin_script_push(builder) - } -} - -impl Pushable for CM31 { - fn bitcoin_script_push(self, builder: Builder) -> Builder { - let builder = self.1.bitcoin_script_push(builder); - self.0.bitcoin_script_push(builder) - } -} - -impl Pushable for QM31 { - fn bitcoin_script_push(self, builder: Builder) -> Builder { - let builder = self.1.bitcoin_script_push(builder); - self.0.bitcoin_script_push(builder) - } -} - -#[cfg(test)] -mod test { - use crate::channel::Channel; - use crate::circle::CirclePoint; - use crate::fri; - use crate::math::Field; - use crate::twiddle_merkle_tree::TWIDDLE_MERKLE_TREE_ROOT_4; - use crate::utils::permute_eval; - use rand::{Rng, SeedableRng}; - use rand_chacha::ChaCha20Rng; - - #[test] - fn test_cfri_main() { - // Prepare a low degree evaluation - let logn = 5; - let p = CirclePoint::subgroup_gen(logn + 1); - - let mut prng = ChaCha20Rng::seed_from_u64(0); - - let mut channel_init_state = [0u8; 32]; - channel_init_state.iter_mut().for_each(|v| *v = prng.gen()); - - // Note: Add another .square() to make the proof fail. - let evaluation = (0..(1 << logn)) - .map(|i| (p.mul(i * 2 + 1).x.square().square() + 1.into()).into()) - .collect(); - let evaluation = permute_eval(evaluation); - - // FRI. - let proof = fri::fri_prove(&mut Channel::new(channel_init_state), evaluation); - fri::fri_verify( - &mut Channel::new(channel_init_state), - logn, - proof, - TWIDDLE_MERKLE_TREE_ROOT_4, - ); - } -} diff --git a/src/math/bitcoin_script.rs b/src/math/bitcoin_script.rs deleted file mode 100644 index 9812f83..0000000 --- a/src/math/bitcoin_script.rs +++ /dev/null @@ -1,88 +0,0 @@ -use crate::treepp::*; -use rust_bitcoin_m31::{ - qm31_add, qm31_fromaltstack, qm31_mul_m31, qm31_over, qm31_sub, qm31_toaltstack, -}; - -/// Gadget for FFT. -pub struct FFTGadget; - -impl FFTGadget { - /// Perform inverse butterfly in Bitcoin script. - /// input: - /// v0 (qm31) - /// v1 (qm31) - /// itwid (m31) - /// - /// output: - /// v0' (qm31) - /// v1' (qm31) - pub fn ibutterfly() -> Script { - script! { - OP_TOALTSTACK - - qm31_over - qm31_over - qm31_sub - - OP_FROMALTSTACK - qm31_mul_m31 - - qm31_toaltstack - - qm31_add - - qm31_fromaltstack - } - } -} - -#[cfg(test)] -mod test { - use crate::math::fft::ibutterfly; - use crate::math::{FFTGadget, M31, QM31}; - use crate::treepp::*; - use rand::{RngCore, SeedableRng}; - use rand_chacha::ChaCha20Rng; - use rust_bitcoin_m31::qm31_equalverify; - - #[test] - fn test_ibutterfly() { - let mut prng = ChaCha20Rng::seed_from_u64(0); - - let a = QM31::from_m31( - M31::reduce(prng.next_u64()), - M31::reduce(prng.next_u64()), - M31::reduce(prng.next_u64()), - M31::reduce(prng.next_u64()), - ); - - let b = QM31::from_m31( - M31::reduce(prng.next_u64()), - M31::reduce(prng.next_u64()), - M31::reduce(prng.next_u64()), - M31::reduce(prng.next_u64()), - ); - - let itwid = M31::reduce(prng.next_u64()); - - let mut v0 = a; - let mut v1 = b; - - ibutterfly(&mut v0, &mut v1, itwid.into()); - - let script = script! { - { a } - { b } - { itwid } - { FFTGadget::ibutterfly() } - { v1 } - qm31_equalverify - { v0 } - qm31_equalverify - OP_TRUE - }; - - let exec_result = execute_script(script); - assert!(exec_result.success); - } -} diff --git a/src/math/fft.rs b/src/math/fft.rs deleted file mode 100644 index d9d9a4a..0000000 --- a/src/math/fft.rs +++ /dev/null @@ -1,36 +0,0 @@ -use crate::circle::CirclePoint; -use crate::math::{Field, M31}; -use crate::utils::bit_reverse_index; - -/// Perform an inverse butterfly (for inverse FFT). -pub fn ibutterfly(v0: &mut F, v1: &mut F, itwid: F) { - let tmp = *v0; - *v0 = tmp + *v1; - *v1 = (tmp + (-*v1)) * itwid; -} - -/// Compute all the twiddle factors. -pub fn get_twiddles(mut logn: usize) -> Vec> { - let mut twiddles = Vec::with_capacity(logn); - - let mut p = CirclePoint::subgroup_gen(logn + 1); - let mut step = CirclePoint::subgroup_gen(logn - 1); - - let mut layer = Vec::with_capacity(1 << logn); - for i in 0..(1 << (logn - 1)) { - layer.push((p + step.mul(bit_reverse_index(i, logn - 1) as u128)).y); - } - twiddles.push(layer); - for _ in 0..(logn - 1) { - logn -= 1; - let mut layer = Vec::with_capacity(1 << logn); - for i in 0..(1 << (logn - 1)) { - layer.push((p + step.mul(bit_reverse_index(i, logn - 1) as u128)).x); - } - twiddles.push(layer); - p = p.double(); - step = step.double(); - } - - twiddles -} diff --git a/src/math/mod.rs b/src/math/mod.rs deleted file mode 100644 index a5cd6ba..0000000 --- a/src/math/mod.rs +++ /dev/null @@ -1,267 +0,0 @@ -use std::fmt::Display; -use std::ops::{Add, Mul, Neg, Sub}; - -mod bitcoin_script; -pub use bitcoin_script::*; - -/// Module for the FFT implementation. -pub mod fft; - -const MODULUS_BITS: u32 = 31; -/// Prime modulus for m31, cm31, qm31 elements. -pub const P: u32 = 2147483647; - -/// A trait for finite field. -pub trait Field: - Neg - + Copy - + Display - + PartialOrd - + Ord - + Send - + Sync - + Sized - + Mul - + Add -{ - /// Get the one field element. - fn one() -> Self; - /// Get the zero field element. - fn zero() -> Self; - - /// Square a field element. - fn square(&self) -> Self { - (*self) * (*self) - } - - /// Double a field element. - fn double(&self) -> Self { - (*self) + (*self) - } - - /// Compute the exponentiation of a field element. - fn pow(&self, exp: u128) -> Self { - let mut res = Self::one(); - let mut base = *self; - let mut exp = exp; - while exp > 0 { - if exp & 1 == 1 { - res = res * base; - } - base = base.square(); - exp >>= 1; - } - res - } - - /// Compute the inverse of a field element. - fn inverse(&self) -> Self; -} - -/// A m31 element. -#[derive(Copy, Clone, Debug, Default, PartialEq, Eq, PartialOrd, Ord, Hash)] -pub struct M31(pub u32); - -impl M31 { - /// Construct a m31 element from reducing from a u64 element. - pub const fn reduce(val: u64) -> Self { - Self((((((val >> MODULUS_BITS) + val + 1) >> MODULUS_BITS) + val) & (P as u64)) as u32) - } -} - -impl Display for M31 { - fn fmt(&self, f: &mut std::fmt::Formatter<'_>) -> std::fmt::Result { - write!(f, "{}", self.0) - } -} - -impl Add for M31 { - type Output = Self; - - fn add(self, rhs: Self) -> Self::Output { - Self::reduce((self.0 as u64) + (rhs.0 as u64)) - } -} - -impl Neg for M31 { - type Output = Self; - - fn neg(self) -> Self::Output { - Self::reduce(P as u64 - (self.0 as u64)) - } -} - -impl Sub for M31 { - type Output = Self; - - fn sub(self, rhs: Self) -> Self::Output { - Self::reduce((self.0 as u64) + (P as u64) - (rhs.0 as u64)) - } -} - -impl Mul for M31 { - type Output = Self; - - fn mul(self, rhs: Self) -> Self::Output { - Self::reduce((self.0 as u64) * (rhs.0 as u64)) - } -} - -impl From for M31 { - fn from(value: u32) -> Self { - M31::reduce(value.into()) - } -} - -impl Field for M31 { - fn zero() -> Self { - M31::from(0) - } - fn one() -> Self { - M31::from(1) - } - fn inverse(&self) -> Self { - self.pow(P as u128 - 2) - } -} - -/// A cm31 element. -#[derive(Copy, Clone, Debug, Default, PartialEq, Eq, PartialOrd, Ord, Hash)] -pub struct CM31(pub M31, pub M31); - -impl Display for CM31 { - fn fmt(&self, f: &mut std::fmt::Formatter<'_>) -> std::fmt::Result { - write!(f, "{} + {}i", self.0, self.1) - } -} - -impl Mul for CM31 { - type Output = Self; - - fn mul(self, rhs: Self) -> Self::Output { - // (a + bi) * (c + di) = (ac - bd) + (ad + bc)i. - Self( - self.0 * rhs.0 - self.1 * rhs.1, - self.0 * rhs.1 + self.1 * rhs.0, - ) - } -} - -impl Add for CM31 { - type Output = Self; - - fn add(self, rhs: Self) -> Self::Output { - Self(self.0 + rhs.0, self.1 + rhs.1) - } -} - -impl Neg for CM31 { - type Output = Self; - - fn neg(self) -> Self::Output { - Self(-self.0, -self.1) - } -} - -impl Field for CM31 { - fn zero() -> Self { - Self(M31::zero(), M31::zero()) - } - fn one() -> Self { - Self(M31::one(), M31::zero()) - } - fn inverse(&self) -> Self { - assert!(*self != Self::zero(), "0 has no inverse"); - self.pow((P as u128) * (P as u128) - 2) - } -} - -/// The remainder element, used for qm31 multiplication. -pub const R: CM31 = CM31(M31(2), M31(1)); - -/// A qm31 element. -#[derive(Copy, Clone, Default, PartialEq, Eq, PartialOrd, Ord, Hash)] -pub struct QM31(pub CM31, pub CM31); - -impl QM31 { - /// Construct a qm31 element from four u32 elements. - pub const fn from_u32(a: u32, b: u32, c: u32, d: u32) -> Self { - Self( - CM31(M31::reduce(a as u64), M31::reduce(b as u64)), - CM31(M31::reduce(c as u64), M31::reduce(d as u64)), - ) - } - - /// Construct a qm31 element from four m31 elements. - pub fn from_m31(a: M31, b: M31, c: M31, d: M31) -> Self { - Self(CM31(a, b), CM31(c, d)) - } - - /// Construct a qm31 element from four m31 elements. - pub fn from_m31_array(array: [M31; 4]) -> Self { - Self::from_m31(array[0], array[1], array[2], array[3]) - } -} - -impl Display for QM31 { - fn fmt(&self, f: &mut std::fmt::Formatter<'_>) -> std::fmt::Result { - write!(f, "({}) + ({})u", self.0, self.1) - } -} - -impl std::fmt::Debug for QM31 { - fn fmt(&self, f: &mut std::fmt::Formatter<'_>) -> std::fmt::Result { - if self.1 == CM31::zero() && self.0 .1 == M31::zero() { - write!(f, "{}", self.0 .0) - } else { - write!(f, "({}) + ({})u", self.0, self.1) - } - } -} - -impl Mul for QM31 { - type Output = Self; - - fn mul(self, rhs: Self) -> Self::Output { - // (a + bu) * (c + du) = (ac + rbd) + (ad + bc)u. - Self( - self.0 * rhs.0 + R * self.1 * rhs.1, - self.0 * rhs.1 + self.1 * rhs.0, - ) - } -} - -impl Add for QM31 { - type Output = Self; - - fn add(self, rhs: Self) -> Self::Output { - Self(self.0 + rhs.0, self.1 + rhs.1) - } -} - -impl Neg for QM31 { - type Output = Self; - - fn neg(self) -> Self::Output { - Self(-self.0, -self.1) - } -} - -impl Field for QM31 { - fn zero() -> Self { - Self(CM31::zero(), CM31::zero()) - } - fn one() -> Self { - Self(CM31::one(), CM31::zero()) - } - fn inverse(&self) -> Self { - assert!(*self != Self::zero(), "0 has no inverse"); - self.pow((P as u128) * (P as u128) * (P as u128) * (P as u128) - 2) - } -} - -impl From for QM31 { - fn from(value: M31) -> Self { - QM31::from_m31(value, M31::zero(), M31::zero(), M31::zero()) - } -} diff --git a/src/merkle_tree/bitcoin_script.rs b/src/merkle_tree/bitcoin_script.rs deleted file mode 100644 index 89d5392..0000000 --- a/src/merkle_tree/bitcoin_script.rs +++ /dev/null @@ -1,169 +0,0 @@ -use crate::channel_commit::CommitmentGadget; -use crate::merkle_tree::MerkleTreeProof; -use crate::treepp::*; -use crate::utils::limb_to_be_bits_toaltstack; - -/// Gadget for verifying a regular binary Merkle tree. -pub struct MerkleTreeGadget; - -impl MerkleTreeGadget { - /// Push the Merkle tree proof into the stack (and used as a hint). - pub fn push_merkle_tree_proof(merkle_proof: &MerkleTreeProof) -> Script { - script! { - { merkle_proof.leaf } - for elem in merkle_proof.siblings.iter() { - { elem.to_vec() } - } - } - } - - pub(crate) fn query_and_verify_internal(logn: usize, is_sibling: bool) -> Script { - script! { - OP_DEPTH OP_1SUB OP_ROLL - OP_DEPTH OP_1SUB OP_ROLL - OP_DEPTH OP_1SUB OP_ROLL - OP_DEPTH OP_1SUB OP_ROLL - - // copy-paste the 4 elements - // ABCD -> CDAB -> CDABAB -> ABABCD-> ABABCDCD - // -> ABCDCDAB -> ABCDABCD - - OP_2SWAP - OP_2DUP - OP_2ROT - OP_2DUP - OP_2ROT - OP_2SWAP - - { CommitmentGadget::commit_qm31() } - - if is_sibling { - OP_DEPTH OP_1SUB OP_ROLL - OP_FROMALTSTACK OP_NOTIF OP_SWAP OP_ENDIF - OP_CAT OP_SHA256 - - for _ in 1..logn { - OP_DEPTH OP_1SUB OP_ROLL - OP_FROMALTSTACK OP_IF OP_SWAP OP_ENDIF - OP_CAT OP_SHA256 - } - } else { - for _ in 0..logn { - OP_DEPTH OP_1SUB OP_ROLL - OP_FROMALTSTACK OP_IF OP_SWAP OP_ENDIF - OP_CAT OP_SHA256 - } - } - - 5 OP_ROLL - OP_EQUALVERIFY - } - } - - /// Query and verify using the Merkle path as a hint. - /// input: - /// root_hash - /// pos - /// - /// output: - /// v (qm31 -- 4 elements) - pub fn query_and_verify(logn: usize) -> Script { - script! { - { limb_to_be_bits_toaltstack(logn as u32) } - { Self::query_and_verify_internal(logn, false) } - } - } - - /// Query and verify using the Merkle path as a hint, but for its sibling instead. - pub fn query_and_verify_sibling(logn: usize) -> Script { - script! { - { limb_to_be_bits_toaltstack(logn as u32) } - { Self::query_and_verify_internal(logn, true) } - } - } -} - -#[cfg(test)] -mod test { - use crate::math::{CM31, M31, QM31}; - use crate::merkle_tree::{MerkleTree, MerkleTreeGadget}; - use crate::treepp::*; - use rand::{Rng, RngCore, SeedableRng}; - use rand_chacha::ChaCha20Rng; - use rust_bitcoin_m31::qm31_equalverify; - - #[test] - fn test_merkle_tree_verify() { - let mut prng = ChaCha20Rng::seed_from_u64(0); - - for logn in 12..=20 { - let verify_script = MerkleTreeGadget::query_and_verify(logn); - println!("MT.verify(2^{}) = {} bytes", logn, verify_script.len()); - - let mut last_layer = vec![]; - for _ in 0..(1 << logn) { - last_layer.push(QM31( - CM31(M31::reduce(prng.next_u64()), M31::reduce(prng.next_u64())), - CM31(M31::reduce(prng.next_u64()), M31::reduce(prng.next_u64())), - )); - } - - let merkle_tree = MerkleTree::new(last_layer.clone()); - - let mut pos: u32 = prng.gen(); - pos &= (1 << logn) - 1; - - let proof = merkle_tree.query(pos as usize); - - let script = script! { - { MerkleTreeGadget::push_merkle_tree_proof(&proof) } - { merkle_tree.root_hash.to_vec() } - { pos } - { verify_script.clone() } - { last_layer[pos as usize] } - qm31_equalverify - OP_TRUE - }; - - let exec_result = execute_script(script); - assert!(exec_result.success); - } - } - - #[test] - fn test_merkle_tree_verify_sibling() { - let mut prng = ChaCha20Rng::seed_from_u64(0); - - for logn in 12..=20 { - let verify_script = MerkleTreeGadget::query_and_verify_sibling(logn); - - let mut last_layer = vec![]; - for _ in 0..(1 << logn) { - last_layer.push(QM31( - CM31(M31::reduce(prng.next_u64()), M31::reduce(prng.next_u64())), - CM31(M31::reduce(prng.next_u64()), M31::reduce(prng.next_u64())), - )); - } - - let merkle_tree = MerkleTree::new(last_layer.clone()); - - let mut pos: u32 = prng.gen(); - pos &= (1 << logn) - 1; - - let proof = merkle_tree.query((pos ^ 1) as usize); - - let script = script! { - { MerkleTreeGadget::push_merkle_tree_proof(&proof) } - { merkle_tree.root_hash.to_vec() } - { pos } - { verify_script.clone() } - { last_layer[(pos ^ 1) as usize] } - qm31_equalverify - OP_TRUE - }; - - let exec_result = execute_script(script); - assert!(exec_result.success); - } - } -} diff --git a/src/merkle_tree/mod.rs b/src/merkle_tree/mod.rs deleted file mode 100644 index 9f9b3b7..0000000 --- a/src/merkle_tree/mod.rs +++ /dev/null @@ -1,153 +0,0 @@ -use crate::channel_commit::Commitment; -use crate::math::QM31; -use sha2::{Digest, Sha256}; - -mod bitcoin_script; -pub use bitcoin_script::*; - -/// A Merkle tree. -pub struct MerkleTree { - /// Leaf layers, consisting of qm31 elements. - pub leaf_layer: Vec, - /// Intermediate layers. - pub intermediate_layers: Vec>, - /// Root hash. - pub root_hash: [u8; 32], -} - -impl MerkleTree { - /// Create a new Merkle tree. - pub fn new(leaf_layer: Vec) -> Self { - assert!(leaf_layer.len().is_power_of_two()); - - let mut intermediate_layers = vec![]; - let mut cur = leaf_layer - .chunks_exact(2) - .map(|v| { - let commit_1 = Commitment::commit_qm31(v[0]); - let commit_2 = Commitment::commit_qm31(v[1]); - - let mut hash_result = [0u8; 32]; - - let mut hasher = Sha256::new(); - Digest::update(&mut hasher, commit_1.0); - Digest::update(&mut hasher, commit_2.0); - hash_result.copy_from_slice(hasher.finalize().as_slice()); - hash_result - }) - .collect::>(); - intermediate_layers.push(cur.clone()); - - while cur.len() > 1 { - cur = cur - .chunks_exact(2) - .map(|v| { - let mut hash_result = [0u8; 32]; - let mut hasher = Sha256::new(); - Digest::update(&mut hasher, v[0]); - Digest::update(&mut hasher, v[1]); - hash_result.copy_from_slice(hasher.finalize().as_slice()); - hash_result - }) - .collect::>(); - intermediate_layers.push(cur.clone()); - } - - Self { - leaf_layer, - intermediate_layers, - root_hash: cur[0], - } - } - - /// Query the Merkle tree and generate a corresponding proof. - pub fn query(&self, mut pos: usize) -> MerkleTreeProof { - let logn = self.intermediate_layers.len(); - - let mut merkle_tree_proof = MerkleTreeProof { - leaf: self.leaf_layer[pos], - ..Default::default() - }; - merkle_tree_proof.leaf = self.leaf_layer[pos]; - merkle_tree_proof - .siblings - .push(Commitment::commit_qm31(self.leaf_layer[pos ^ 1]).0); - - for i in 0..(logn - 1) { - pos >>= 1; - merkle_tree_proof - .siblings - .push(self.intermediate_layers[i][pos ^ 1]); - } - - merkle_tree_proof - } - - /// Verify a Merkle tree proof. - pub fn verify( - root_hash: [u8; 32], - logn: usize, - proof: &MerkleTreeProof, - mut query: usize, - ) -> bool { - assert_eq!(proof.siblings.len(), logn); - - let mut leaf_hash = Commitment::commit_qm31(proof.leaf).0; - - for i in 0..logn { - let (f0, f1) = if query & 1 == 0 { - (leaf_hash, proof.siblings[i]) - } else { - (proof.siblings[i], leaf_hash) - }; - - let mut hasher = Sha256::new(); - Digest::update(&mut hasher, f0); - Digest::update(&mut hasher, f1); - leaf_hash.copy_from_slice(hasher.finalize().as_slice()); - - query >>= 1; - } - - leaf_hash == root_hash - } -} - -/// A Merkle tree proof. -#[derive(Default, Clone, Debug)] -pub struct MerkleTreeProof { - /// Leaf as a qm31 element. - pub leaf: QM31, - /// All the intermediate sibling nodes. - pub siblings: Vec<[u8; 32]>, -} - -#[cfg(test)] -mod test { - use crate::math::{CM31, M31, QM31}; - use crate::merkle_tree::MerkleTree; - use rand::{Rng, RngCore, SeedableRng}; - use rand_chacha::ChaCha20Rng; - - #[test] - fn test_merkle_tree() { - let mut prng = ChaCha20Rng::seed_from_u64(0); - - let mut last_layer = vec![]; - for _ in 0..1 << 12 { - last_layer.push(QM31( - CM31(M31::reduce(prng.next_u64()), M31::reduce(prng.next_u64())), - CM31(M31::reduce(prng.next_u64()), M31::reduce(prng.next_u64())), - )); - } - - let merkle_tree = MerkleTree::new(last_layer.clone()); - - for _ in 0..10 { - let query = (prng.gen::() % (1 << 12)) as usize; - - let proof = merkle_tree.query(query); - assert!(MerkleTree::verify(merkle_tree.root_hash, 12, &proof, query)); - } - } -} diff --git a/src/pow/bitcoin_script.rs b/src/pow/bitcoin_script.rs deleted file mode 100644 index 60e19c2..0000000 --- a/src/pow/bitcoin_script.rs +++ /dev/null @@ -1,245 +0,0 @@ -use crate::pow::hash_with_nonce; -use crate::treepp::*; - -/// Gadget for verifying PoW. -pub struct PowGadget; - -impl PowGadget { - /// Verify the PoW in Bitcoin script. - /// input: - /// channel (32 bytes) - /// nonce (64-bit string, aka 8 bytes) - /// suffix (the sha256 result after the leading zero bytes and the MSB [if applicable]) - /// msb (applicable if n_bits % 8 != 0) - /// - /// output: - /// channel' = sha256(channel || nonce) - /// - /// require: - /// {0x00}^(n_bits // 8) || msb || suffix != sha256(channel||nonce) - /// where msb is required if n_bits % 8 != 0 and should not be present if it is not - /// msb starts with n_bits % 8 (which would be at least 1) zero bits. - pub fn verify_pow(n_bits: usize) -> Script { - assert!(n_bits > 0); - - script! { - // move the msb away for simplicity - if n_bits % 8 != 0 { - OP_TOALTSTACK - } - - // check the length of the nonce - 1 OP_PICK - OP_SIZE 8 OP_EQUALVERIFY - OP_DROP - - // check the length of the suffix - OP_SIZE { 32 - ((n_bits + 7) / 8) } OP_EQUALVERIFY - - // compute the channel and nonce - OP_ROT OP_ROT - OP_CAT - OP_SHA256 - OP_SWAP - - // current stack: - // new channel - // suffix - // - // altstack: - // msb (if applicable) - - // push the necessary number of zeroes - if n_bits / 8 > 0 { - { vec![0u8; n_bits / 8] } - } - - // if msb is present, check the msb is small enough, - // and if it is a zero, make it `0x00` - if n_bits % 8 != 0 { - OP_FROMALTSTACK - OP_DUP - 0 OP_GREATERTHANOREQUAL OP_VERIFY - OP_DUP - { 1 << (8 - n_bits % 8) } OP_LESSTHAN OP_VERIFY - OP_DUP - 0 OP_EQUAL OP_IF - OP_DROP OP_PUSHBYTES_1 OP_PUSHBYTES_0 - OP_ENDIF - - if n_bits / 8 > 0 { - OP_CAT - } - } - - // current stack: - // new channel - // suffix - // prefix - - OP_SWAP - OP_CAT - - OP_OVER - OP_EQUALVERIFY - } - } - - /// Push the hint for verifying the PoW. - /// It contains the nonce, the suffix, and the msb (if n_bits % 8 != 0). - /// - /// Need to be copied to the right location. `verify_pow` does not use the hint stack. - pub fn push_pow_hint(channel_digest: Vec, nonce: u64, n_bits: usize) -> Script { - assert!(n_bits > 0); - - let digest = hash_with_nonce(&channel_digest, nonce); - - script! { - { nonce.to_le_bytes().to_vec() } - if n_bits % 8 == 0 { - { digest[(n_bits / 8)..].to_vec() } - } else { - { digest[(n_bits + 8 - 1) / 8..].to_vec() } - { digest[n_bits / 8] } - } - } - } -} - -#[cfg(test)] -mod test { - use crate::treepp::*; - use rand::{RngCore, SeedableRng}; - use rand_chacha::ChaCha20Rng; - - use crate::pow::{bitcoin_script::PowGadget, grind_find_nonce, hash_with_nonce}; - - #[test] - fn test_push_pow_hint() { - let mut prng = ChaCha20Rng::seed_from_u64(0); - - let mut channel_digest = vec![0u8; 32]; - prng.fill_bytes(&mut channel_digest); - - let nonce = grind_find_nonce(channel_digest.clone(), 1); - let new_channel = hash_with_nonce(&channel_digest, nonce); - - let script = script! { - { PowGadget::push_pow_hint(channel_digest.clone(), nonce, 1) } - { new_channel[0] } - OP_EQUALVERIFY - { new_channel[1..].to_vec() } - OP_EQUALVERIFY - { nonce.to_le_bytes().to_vec() } - OP_EQUALVERIFY - OP_TRUE - }; - let exec_result = execute_script(script); - assert!(exec_result.success); - } - - #[test] - fn test_fail_verify() { - let n_bits = 8; - - let mut prng = ChaCha20Rng::seed_from_u64(1337); - - let mut channel_digest = [0u8; 32].to_vec(); - prng.fill_bytes(&mut channel_digest); - - let nonce = 1337; - - let script = script! { - { channel_digest.clone() } - { PowGadget::push_pow_hint(channel_digest.clone(), nonce, n_bits) } - { PowGadget::verify_pow(n_bits)} - OP_DROP - OP_TRUE - }; - - let exec_result = execute_script(script); - assert!(!exec_result.success); - - let n_bits = 1; - - let mut prng = ChaCha20Rng::seed_from_u64(1337); - - let mut channel_digest = [0u8; 32].to_vec(); - prng.fill_bytes(&mut channel_digest); - - let nonce = 1337 + 4; - - let script = script! { - { channel_digest.clone() } - { PowGadget::push_pow_hint(channel_digest.clone(), nonce, n_bits) } - { PowGadget::verify_pow(n_bits)} - OP_DROP - OP_TRUE - }; - - let exec_result = execute_script(script); - assert!(!exec_result.success); - - let n_bits = 12; - - let mut prng = ChaCha20Rng::seed_from_u64(1337); - - let mut channel_digest = [0u8; 32].to_vec(); - prng.fill_bytes(&mut channel_digest); - - let nonce = 1337; - - let script = script! { - { channel_digest.clone() } - { PowGadget::push_pow_hint(channel_digest.clone(), nonce, n_bits) } - { PowGadget::verify_pow(n_bits)} - OP_DROP - OP_TRUE - }; - - let exec_result = execute_script(script); - assert!(!exec_result.success); - } - - #[test] - fn test_pow() { - for prng_seed in 0..5 { - for n_bits in 1..=20 { - let mut prng = ChaCha20Rng::seed_from_u64(prng_seed); - - let mut channel_digest = [0u8; 32].to_vec(); - prng.fill_bytes(&mut channel_digest); - - let nonce = grind_find_nonce(channel_digest.clone(), n_bits.try_into().unwrap()); - - let verify_pow_script = PowGadget::verify_pow(n_bits); - if prng_seed == 0 { - println!( - "POW.verify_pow({} bits) = {} bytes", - n_bits, - verify_pow_script.len() - ); - } - - let script = script! { - { channel_digest.clone() } - { PowGadget::push_pow_hint(channel_digest.clone(), nonce, n_bits) } - { verify_pow_script.clone() } - { channel_digest.clone() } - { nonce.to_le_bytes().to_vec() } - OP_CAT - OP_SHA256 - OP_EQUALVERIFY // checking that indeed channel' = sha256(channel||nonce) - OP_TRUE - }; - let exec_result = execute_script(script); - assert!(exec_result.success); - } - } - - println!( - "POW.verify_pow(78 bits) = {} bytes", - PowGadget::verify_pow(78).len(), - ); - } -} diff --git a/src/pow/mod.rs b/src/pow/mod.rs deleted file mode 100644 index 98e28f4..0000000 --- a/src/pow/mod.rs +++ /dev/null @@ -1,43 +0,0 @@ -mod bitcoin_script; -pub use bitcoin_script::*; - -use sha2::{Digest, Sha256}; - -/// Check that the prefix leading zeros is greater than `bound_bits`. -pub fn check_leading_zeros(bytes: &[u8], bound_bits: u32) -> bool { - let mut n_bits = 0; - // bytes are in little endian order. - for byte in bytes.iter() { - if *byte == 0 { - n_bits += 8; - } else { - n_bits += byte.leading_zeros(); - break; - } - } - n_bits >= bound_bits -} - -/// Compute the hash from a seed and a nonce. -pub fn hash_with_nonce(seed: &[u8], nonce: u64) -> Vec { - let mut concat = seed.to_owned(); - concat.extend(nonce.to_le_bytes().to_vec()); - - let mut hasher = Sha256::new(); - Digest::update(&mut hasher, concat); - - hasher.finalize().as_slice().to_vec() -} - -/// A handy function for grinding, which finds a nonce that makes the resulting hash with enough zeroes. -pub fn grind_find_nonce(channel_digest: Vec, n_bits: u32) -> u64 { - let mut nonce = 0u64; - - loop { - let hash = hash_with_nonce(&channel_digest, nonce); - if check_leading_zeros(hash.as_ref(), n_bits) { - return nonce; - } - nonce += 1; - } -} diff --git a/src/twiddle_merkle_tree/bitcoin_script.rs b/src/twiddle_merkle_tree/bitcoin_script.rs deleted file mode 100644 index f38bb82..0000000 --- a/src/twiddle_merkle_tree/bitcoin_script.rs +++ /dev/null @@ -1,136 +0,0 @@ -use crate::treepp::*; -use crate::twiddle_merkle_tree::TwiddleMerkleTreeProof; -use crate::utils::limb_to_le_bits; - -/// Gadget for verifying a Merkle tree path in a twiddle tree. -pub struct TwiddleMerkleTreeGadget; - -impl TwiddleMerkleTreeGadget { - /// Push a Merkle tree proof for the twiddle tree into the stack. - pub fn push_twiddle_merkle_tree_proof( - twiddle_merkle_tree_proof: &TwiddleMerkleTreeProof, - ) -> Script { - script! { - { *twiddle_merkle_tree_proof.elements.last().unwrap() } - for (element, sibling) in twiddle_merkle_tree_proof.elements.iter().rev().skip(1).zip(twiddle_merkle_tree_proof.siblings.iter()) { - { *element } - { sibling.to_vec() } - } - { twiddle_merkle_tree_proof.siblings.last().unwrap().to_vec() } - } - } - - /// Query the twiddle tree on a point and verify the Merkle tree proof (as a hint). - /// - /// hint: - /// merkle path consisting of entries of the form (mid-element, sibling) - /// - /// input: - /// root_hash - /// pos - /// - /// output: - /// v (m31 -- [num_layer] elements) - pub fn query_and_verify(logn: usize) -> Script { - let num_layer = logn - 1; - script! { - // convert pos into bits and drop the LSB - { limb_to_le_bits(logn as u32) } - OP_DROP - - // obtain the leaf element v - OP_DEPTH OP_1SUB OP_ROLL - OP_DUP OP_TOALTSTACK - - // compute the current element's hash - OP_SHA256 - - // stack: root_hash, , leaf-hash - // altstack: leaf - - // for every layer - for _ in 0..num_layer - 1 { - // pull the middle element and copy to the altstack - OP_DEPTH OP_1SUB OP_ROLL - OP_DUP OP_TOALTSTACK - - // stack: root_hash, , leaf-hash, middle-element - // altstack: leaf, middle-element - - // pull the sibling - OP_DEPTH OP_1SUB OP_ROLL - - // stack: root_hash, , leaf-hash, middle-element, sibling - // altstack: leaf, middle-element - - // pull a bit - 3 OP_ROLL - // check if we need to swap, and swap if needed - OP_IF OP_SWAP OP_ROT OP_ENDIF - - OP_CAT OP_CAT - OP_SHA256 - } - - // pull the sibling - OP_DEPTH OP_1SUB OP_ROLL - - // stack: root_hash, , leaf-hash, sibling - - // pull a bit - OP_ROT - // check if we need to swap, and swap if needed - OP_IF OP_SWAP OP_ENDIF - OP_CAT - OP_SHA256 - - OP_EQUALVERIFY - - for _ in 0..num_layer { - OP_FROMALTSTACK - } - } - } -} - -#[cfg(test)] -mod test { - use crate::treepp::*; - use crate::twiddle_merkle_tree::{TwiddleMerkleTree, TwiddleMerkleTreeGadget}; - use rand::{Rng, SeedableRng}; - use rand_chacha::ChaCha20Rng; - - #[test] - fn test_twiddle_merkle_tree() { - let mut prng = ChaCha20Rng::seed_from_u64(0); - - for logn in 12..=20 { - let verify_script = TwiddleMerkleTreeGadget::query_and_verify(logn); - println!("TMT.verify(2^{}) = {} bytes", logn, verify_script.len()); - - let n_layers = logn - 1; - - let twiddle_merkle_tree = TwiddleMerkleTree::new(n_layers); - - let mut pos: u32 = prng.gen(); - pos &= (1 << logn) - 1; - - let proof = twiddle_merkle_tree.query(pos as usize); - - let script = script! { - { TwiddleMerkleTreeGadget::push_twiddle_merkle_tree_proof(&proof) } - { twiddle_merkle_tree.root_hash.to_vec() } - { pos } - { verify_script.clone() } - for i in 0..n_layers { - { proof.elements[n_layers - 1 - i] } - OP_EQUALVERIFY - } - OP_TRUE - }; - - let exec_result = execute_script(script); - assert!(exec_result.success); - } - } -} diff --git a/src/twiddle_merkle_tree/constants.rs b/src/twiddle_merkle_tree/constants.rs deleted file mode 100644 index ccdb769..0000000 --- a/src/twiddle_merkle_tree/constants.rs +++ /dev/null @@ -1,119 +0,0 @@ -/// A merkle tree for (inverse) twiddle factors for FRI of size 2^4 (for testing purposes). -pub const TWIDDLE_MERKLE_TREE_ROOT_4: [u8; 32] = [ - 155, 221, 126, 120, 226, 141, 188, 129, 217, 133, 181, 173, 66, 72, 29, 85, 122, 133, 243, 189, - 170, 113, 232, 70, 89, 18, 233, 232, 29, 80, 111, 211, -]; -/// A merkle tree for (inverse) twiddle factors for FRI of size 2^12. -pub const TWIDDLE_MERKLE_TREE_ROOT_12: [u8; 32] = [ - 169, 7, 145, 220, 217, 144, 36, 115, 4, 152, 210, 101, 215, 236, 249, 193, 253, 217, 147, 239, - 0, 174, 31, 107, 1, 7, 33, 95, 28, 135, 16, 65, -]; -/// A merkle tree for (inverse) twiddle factors for FRI of size 2^13. -pub const TWIDDLE_MERKLE_TREE_ROOT_13: [u8; 32] = [ - 170, 126, 39, 40, 241, 235, 24, 93, 11, 149, 111, 73, 173, 41, 229, 27, 8, 84, 47, 134, 191, - 48, 113, 104, 39, 181, 164, 16, 131, 150, 117, 18, -]; -/// A merkle tree for (inverse) twiddle factors for FRI of size 2^14. -pub const TWIDDLE_MERKLE_TREE_ROOT_14: [u8; 32] = [ - 191, 186, 206, 148, 168, 116, 201, 126, 93, 8, 125, 248, 214, 216, 7, 7, 226, 244, 121, 213, - 203, 105, 82, 171, 31, 7, 92, 108, 36, 255, 47, 129, -]; -/// A merkle tree for (inverse) twiddle factors for FRI of size 2^15. -pub const TWIDDLE_MERKLE_TREE_ROOT_15: [u8; 32] = [ - 175, 192, 186, 216, 37, 152, 148, 47, 202, 61, 224, 113, 115, 51, 45, 180, 22, 34, 129, 253, - 228, 13, 143, 38, 235, 17, 75, 44, 119, 1, 40, 118, -]; -/// A merkle tree for (inverse) twiddle factors for FRI of size 2^16. -pub const TWIDDLE_MERKLE_TREE_ROOT_16: [u8; 32] = [ - 177, 52, 102, 9, 180, 232, 129, 66, 248, 235, 45, 146, 237, 144, 94, 73, 35, 218, 245, 211, - 154, 7, 81, 219, 77, 12, 107, 107, 153, 228, 69, 67, -]; -/// A merkle tree for (inverse) twiddle factors for FRI of size 2^17. -pub const TWIDDLE_MERKLE_TREE_ROOT_17: [u8; 32] = [ - 166, 171, 155, 101, 121, 153, 227, 175, 247, 69, 34, 181, 86, 201, 108, 90, 18, 165, 94, 14, - 106, 240, 120, 26, 230, 163, 124, 148, 109, 172, 156, 212, -]; -/// A merkle tree for (inverse) twiddle factors for FRI of size 2^18. -pub const TWIDDLE_MERKLE_TREE_ROOT_18: [u8; 32] = [ - 193, 158, 234, 31, 98, 237, 129, 58, 235, 233, 247, 121, 15, 134, 207, 146, 168, 162, 149, 246, - 92, 124, 216, 16, 208, 242, 95, 246, 66, 126, 52, 127, -]; -/// A merkle tree for (inverse) twiddle factors for FRI of size 2^19. -pub const TWIDDLE_MERKLE_TREE_ROOT_19: [u8; 32] = [ - 33, 144, 1, 204, 125, 132, 151, 103, 204, 78, 228, 179, 116, 83, 113, 17, 36, 123, 169, 166, - 181, 156, 185, 103, 15, 12, 197, 132, 7, 117, 167, 80, -]; -/// A merkle tree for (inverse) twiddle factors for FRI of size 2^20. -pub const TWIDDLE_MERKLE_TREE_ROOT_20: [u8; 32] = [ - 214, 101, 105, 146, 250, 175, 142, 119, 214, 243, 223, 47, 203, 181, 247, 45, 69, 103, 132, - 197, 168, 150, 22, 176, 167, 41, 74, 2, 229, 78, 225, 42, -]; -/// A merkle tree for (inverse) twiddle factors for FRI of size 2^21. -pub const TWIDDLE_MERKLE_TREE_ROOT_21: [u8; 32] = [ - 43, 124, 223, 207, 113, 235, 84, 216, 61, 194, 119, 193, 122, 173, 248, 67, 241, 119, 93, 28, - 230, 184, 57, 110, 240, 219, 173, 172, 94, 223, 1, 103, -]; -/// A merkle tree for (inverse) twiddle factors for FRI of size 2^22. -pub const TWIDDLE_MERKLE_TREE_ROOT_22: [u8; 32] = [ - 234, 6, 118, 31, 186, 252, 97, 133, 97, 192, 225, 203, 37, 53, 227, 86, 252, 144, 74, 216, 10, - 223, 45, 118, 155, 44, 64, 189, 66, 173, 150, 219, -]; -/// A merkle tree for (inverse) twiddle factors for FRI of size 2^23. -pub const TWIDDLE_MERKLE_TREE_ROOT_23: [u8; 32] = [ - 67, 144, 251, 117, 241, 19, 150, 25, 225, 46, 110, 175, 231, 106, 26, 42, 79, 93, 216, 128, - 198, 70, 57, 13, 109, 138, 206, 14, 43, 50, 255, 253, -]; -/// A merkle tree for (inverse) twiddle factors for FRI of size 2^24. -pub const TWIDDLE_MERKLE_TREE_ROOT_24: [u8; 32] = [ - 17, 127, 116, 22, 253, 77, 26, 209, 167, 104, 218, 110, 12, 72, 22, 120, 37, 225, 76, 120, 108, - 90, 56, 62, 149, 179, 6, 112, 87, 144, 170, 108, -]; -/// A merkle tree for (inverse) twiddle factors for FRI of size 2^25. -pub const TWIDDLE_MERKLE_TREE_ROOT_25: [u8; 32] = [ - 181, 69, 66, 114, 148, 157, 100, 47, 247, 155, 219, 2, 165, 127, 117, 207, 183, 188, 109, 205, - 6, 74, 180, 221, 102, 14, 254, 61, 0, 235, 64, 88, -]; -#[cfg(test)] -mod test { - use crate::twiddle_merkle_tree::*; - - #[test] - fn test_consistency() { - // for the testing - assert_eq!( - TwiddleMerkleTree::new(4).root_hash, - TWIDDLE_MERKLE_TREE_ROOT_4 - ); - - // unit tests are running until 18. - - assert_eq!( - TwiddleMerkleTree::new(12).root_hash, - TWIDDLE_MERKLE_TREE_ROOT_12 - ); - assert_eq!( - TwiddleMerkleTree::new(13).root_hash, - TWIDDLE_MERKLE_TREE_ROOT_13 - ); - assert_eq!( - TwiddleMerkleTree::new(14).root_hash, - TWIDDLE_MERKLE_TREE_ROOT_14 - ); - assert_eq!( - TwiddleMerkleTree::new(15).root_hash, - TWIDDLE_MERKLE_TREE_ROOT_15 - ); - assert_eq!( - TwiddleMerkleTree::new(16).root_hash, - TWIDDLE_MERKLE_TREE_ROOT_16 - ); - assert_eq!( - TwiddleMerkleTree::new(17).root_hash, - TWIDDLE_MERKLE_TREE_ROOT_17 - ); - assert_eq!( - TwiddleMerkleTree::new(18).root_hash, - TWIDDLE_MERKLE_TREE_ROOT_18 - ); - } -} diff --git a/src/twiddle_merkle_tree/mod.rs b/src/twiddle_merkle_tree/mod.rs deleted file mode 100644 index 697894e..0000000 --- a/src/twiddle_merkle_tree/mod.rs +++ /dev/null @@ -1,190 +0,0 @@ -use crate::math::fft::get_twiddles; -use crate::math::{Field, M31}; -use crate::utils::num_to_bytes; -use sha2::{Digest, Sha256}; - -mod bitcoin_script; -pub use bitcoin_script::*; - -mod constants; -pub use constants::*; - -/// A twiddle Merkle tree. -pub struct TwiddleMerkleTree { - /// The inverse of the twiddle factors. - pub twiddles_inverse: Vec>, - /// Layers, which are compressed through hashes of (left || twiddle factor || right). - pub layers: Vec>, - /// Root hash. - pub root_hash: [u8; 32], -} - -impl TwiddleMerkleTree { - /// Construct the twiddle Merkle tree. - pub fn new(logn: usize) -> Self { - let mut twiddles = get_twiddles(logn + 1).to_vec(); - - twiddles - .iter_mut() - .for_each(|row| row.iter_mut().for_each(|cell| *cell = cell.inverse())); - - let mut layers = vec![]; - - let mut leaf_hashes: Vec<[u8; 32]> = Vec::with_capacity(1 << logn); - for i in 0..(1 << logn) { - let mut bytes = [0u8; 32]; - let hash = { - let mut sha256 = Sha256::new(); - Digest::update(&mut sha256, num_to_bytes(twiddles[0][i])); - sha256.finalize() - }; - bytes.copy_from_slice(&hash); - leaf_hashes.push(bytes); - } - layers.push(leaf_hashes.clone()); - - let mut cur_parent_layer_idx = 1; - - let mut cur = leaf_hashes - .chunks_exact(2) - .enumerate() - .map(|(i, v)| { - let mut hash_result = [0u8; 32]; - - let mut hasher = Sha256::new(); - Digest::update(&mut hasher, v[0]); - Digest::update(&mut hasher, num_to_bytes(twiddles[cur_parent_layer_idx][i])); - Digest::update(&mut hasher, v[1]); - hash_result.copy_from_slice(hasher.finalize().as_slice()); - hash_result - }) - .collect::>(); - layers.push(cur.clone()); - - while cur.len() > 1 { - cur_parent_layer_idx += 1; - - cur = cur - .chunks_exact(2) - .enumerate() - .map(|(i, v)| { - let mut hash_result = [0u8; 32]; - let mut hasher = Sha256::new(); - Digest::update(&mut hasher, v[0]); - if cur_parent_layer_idx != logn { - Digest::update( - &mut hasher, - num_to_bytes(twiddles[cur_parent_layer_idx][i]), - ); - } - Digest::update(&mut hasher, v[1]); - hash_result.copy_from_slice(hasher.finalize().as_slice()); - hash_result - }) - .collect::>(); - layers.push(cur.clone()); - } - - Self { - twiddles_inverse: twiddles, - layers, - root_hash: cur[0], - } - } - - /// Query the twiddle Merkle tree and generate a proof. - pub fn query(&self, mut pos: usize) -> TwiddleMerkleTreeProof { - let logn = self.layers.len(); - - let mut elements = vec![]; - let mut siblings = Vec::with_capacity(logn); - - for i in 0..logn - 1 { - pos >>= 1; - - elements.push(self.twiddles_inverse[i][pos]); - siblings.push(self.layers[i][pos ^ 1]); - } - - elements.reverse(); - - TwiddleMerkleTreeProof { elements, siblings } - } - - /// Verify a twiddle Merkle tree proof. - pub fn verify( - root_hash: [u8; 32], - logn: usize, - proof: &TwiddleMerkleTreeProof, - mut query: usize, - ) -> bool { - assert_eq!(proof.elements.len(), logn); - assert_eq!(proof.siblings.len(), logn); - - query >>= 1; - - let bytes = { - let mut sha256 = Sha256::new(); - Digest::update(&mut sha256, num_to_bytes(proof.elements[logn - 1])); - sha256.finalize().to_vec() - }; - - let mut hash = [0u8; 32]; - hash.copy_from_slice(&bytes); - - for i in 0..logn { - let (f0, f1) = if query & 1 == 0 { - (hash, proof.siblings[i]) - } else { - (proof.siblings[i], hash) - }; - - let mut hasher = Sha256::new(); - Digest::update(&mut hasher, f0); - if i != logn - 1 { - Digest::update(&mut hasher, num_to_bytes(proof.elements[logn - 2 - i])); - } - Digest::update(&mut hasher, f1); - hash.copy_from_slice(hasher.finalize().as_slice()); - - query >>= 1; - } - - hash == root_hash - } -} - -/// A Merkle path proof for twiddle tree. -#[derive(Debug, Clone)] -pub struct TwiddleMerkleTreeProof { - /// Leaf and intermediate nodes, which totals to (logn -1) inverse twiddle factors. - pub elements: Vec, - /// Sibling elements (in hashes). - pub siblings: Vec<[u8; 32]>, -} - -#[cfg(test)] -mod test { - use crate::twiddle_merkle_tree::TwiddleMerkleTree; - use rand::{Rng, SeedableRng}; - use rand_chacha::ChaCha20Rng; - - #[test] - fn test_twiddle_merkle_tree() { - let mut prng = ChaCha20Rng::seed_from_u64(0); - - let twiddle_merkle_tree = TwiddleMerkleTree::new(20); - - for _ in 0..10 { - let query = (prng.gen::() % (1 << 21)) as usize; - - let proof = twiddle_merkle_tree.query(query); - assert!(TwiddleMerkleTree::verify( - twiddle_merkle_tree.root_hash, - 20, - &proof, - query - )); - } - } -} diff --git a/src/utils/bitcoin_script.rs b/src/utils/bitcoin_script.rs deleted file mode 100644 index 75e7d61..0000000 --- a/src/utils/bitcoin_script.rs +++ /dev/null @@ -1,77 +0,0 @@ -use crate::treepp::*; - -/// Gadget for trimming away a m31 element to keep only logn bits. -pub fn trim_m31_gadget(logn: usize) -> Script { - if logn == 31 { - script! {} - } else { - script! { - OP_TOALTSTACK - { 1 << logn } - for _ in logn..(31 - 1) { - OP_DUP OP_DUP OP_ADD - } - OP_FROMALTSTACK - for _ in logn..31 { - OP_SWAP - OP_2DUP OP_GREATERTHANOREQUAL - OP_IF OP_SUB OP_ELSE OP_DROP OP_ENDIF - } - } - } -} - -/// Copy some stack elements to the altstack, where the stack top is being inserted first. -pub fn copy_to_altstack_top_item_first_in(n: usize) -> Script { - script! { - if n > 0 { - OP_DUP OP_TOALTSTACK - } - if n > 1 { - OP_OVER OP_TOALTSTACK - } - for i in 2..n { - { i } OP_PICK OP_TOALTSTACK - } - } -} - -/// Copy some stack elements to the altstack, where the altstack head is the stack top. -pub fn copy_to_altstack_top_item_last_in(n: usize) -> Script { - script! { - for i in 0..n { - { n - 1 - i } OP_PICK OP_TOALTSTACK - } - } -} - -#[cfg(test)] -mod test { - use crate::math::M31; - use crate::treepp::*; - use crate::utils::{trim_m31, trim_m31_gadget}; - use rand::{RngCore, SeedableRng}; - use rand_chacha::ChaCha20Rng; - - #[test] - fn test_trim_m31() { - let mut prng = ChaCha20Rng::seed_from_u64(0); - - for i in 10..=31 { - let trim_script = trim_m31_gadget(i); - println!("M31.trim({}) = {} bytes", i, trim_script.len()); - - let a = M31::reduce(prng.next_u64()); - let b = trim_m31(a.0, i); - - let script = script! { - { a.0 } - { trim_script } - { b } - OP_EQUAL - }; - let exec_result = execute_script(script); - assert!(exec_result.success); - } - } -} diff --git a/src/utils/mod.rs b/src/utils/mod.rs deleted file mode 100644 index e48a29f..0000000 --- a/src/utils/mod.rs +++ /dev/null @@ -1,200 +0,0 @@ -mod bitcoin_script; - -use crate::math::{Field, M31, QM31}; -use crate::treepp::*; -pub use bitcoin_script::*; -use std::cmp::min; - -/// Convert a m31 element to its Bitcoin integer representation. -pub fn num_to_bytes(v: M31) -> Vec { - let mut bytes = Vec::new(); - - let mut v = v.0; - while v > 0 { - bytes.push((v & 0xff) as u8); - v >>= 8; - } - - if bytes.last().is_some() && bytes.last().unwrap() & 0x80 != 0 { - bytes.push(0); - } - - bytes -} - -/// Compute the bit reversed index. -pub fn bit_reverse_index(i: usize, log_size: usize) -> usize { - if i == 0 { - return 0; - } - i.reverse_bits() >> (usize::BITS as usize - log_size) -} - -/// Perform the bit reversal of the evaluations. -pub fn permute_eval(evaluation: Vec) -> Vec { - let logn = evaluation.len().ilog2() as usize; - let mut layer = vec![QM31::zero(); evaluation.len()]; - for i in 0..evaluation.len() / 2 { - layer[bit_reverse_index(i, logn)] = evaluation[i * 2]; - layer[bit_reverse_index(i + evaluation.len() / 2, logn)] = - evaluation[evaluation.len() - 1 - i * 2]; - } - layer -} - -/// Trim a m31 element to have only logn bits. -pub fn trim_m31(v: u32, logn: usize) -> u32 { - v & ((1 << logn) - 1) -} - -// Adapted from https://github.com/BitVM/BitVM/blob/main/src/bigint/bits.rs -// due to inability to reconcile the dependency issues between BitVM and stwo. -fn limb_to_be_bits_common(num_bits: u32) -> Script { - let min_i = min(22, num_bits - 1); - script! { - OP_TOALTSTACK - - // Push the powers of 2 onto the stack - // First, all powers of 2 that we can push as 3-byte numbers - for i in 0..min_i { - { 2 << i } - } - // Then, we double powers of 2 to generate the 4-byte numbers - for _ in min_i..num_bits - 1 { - OP_DUP - OP_DUP - OP_ADD - } - - OP_FROMALTSTACK - - for _ in 0..num_bits - 2 { - OP_2DUP OP_LESSTHANOREQUAL - OP_IF - OP_SWAP OP_SUB 1 - OP_ELSE - OP_NIP 0 - OP_ENDIF - OP_TOALTSTACK - } - - OP_2DUP OP_LESSTHANOREQUAL - OP_IF - OP_SWAP OP_SUB 1 - OP_ELSE - OP_NIP 0 - OP_ENDIF - } -} - -// Convert a limb to low-endian bits -// Adapted from https://github.com/BitVM/BitVM/blob/main/src/bigint/bits.rs -// due to inability to reconcile the dependency issues between BitVM and stwo. -fn limb_to_le_bits_common(num_bits: u32) -> Script { - let min_i = min(22, num_bits - 1); - script! { - // Push the powers of 2 onto the stack - // First, all powers of 2 that we can push as 3-byte numbers - for i in 0..min_i - 1 { - { 2 << i } OP_TOALTSTACK - } - if num_bits - 1 > min_i { - { 2 << (min_i - 1) } OP_DUP OP_TOALTSTACK - - // Then, we double powers of 2 to generate the 4-byte numbers - for _ in min_i..num_bits - 2 { - OP_DUP - OP_ADD - OP_DUP OP_TOALTSTACK - } - - OP_DUP - OP_ADD OP_TOALTSTACK - } else { - { 2 << (min_i - 1) } OP_TOALTSTACK - } - - for _ in 0..num_bits - 2 { - OP_FROMALTSTACK - OP_2DUP OP_GREATERTHANOREQUAL - OP_IF - OP_SUB 1 - OP_ELSE - OP_DROP 0 - OP_ENDIF - OP_SWAP - } - - OP_FROMALTSTACK - OP_2DUP OP_GREATERTHANOREQUAL - OP_IF - OP_SUB 1 - OP_ELSE - OP_DROP 0 - OP_ENDIF - - OP_SWAP - } -} - -/// Convert a limb to low-endian bits -/// Adapted from https://github.com/BitVM/BitVM/blob/main/src/bigint/bits.rs -/// due to inability to reconcile the dependency issues between BitVM and stwo. -pub fn limb_to_le_bits(num_bits: u32) -> Script { - if num_bits >= 2 { - script! { - { limb_to_le_bits_common(num_bits) } - } - } else { - script! {} - } -} - -/// Convert a limb to low-endian bits but store them in the altstack for now -/// Adapted from https://github.com/BitVM/BitVM/blob/main/src/bigint/bits.rs -/// due to inability to reconcile the dependency issues between BitVM and stwo. -pub fn limb_to_le_bits_toaltstack(num_bits: u32) -> Script { - if num_bits >= 2 { - script! { - { limb_to_le_bits_common(num_bits) } - for _ in 0..num_bits { - OP_TOALTSTACK - } - } - } else { - script! {} - } -} - -/// Convert a limb to big-endian bits -/// Adapted from https://github.com/BitVM/BitVM/blob/main/src/bigint/bits.rs -/// due to inability to reconcile the dependency issues between BitVM and stwo. -pub fn limb_to_be_bits(num_bits: u32) -> Script { - if num_bits >= 2 { - script! { - { limb_to_be_bits_common(num_bits) } - for _ in 0..num_bits - 2 { - OP_FROMALTSTACK - } - } - } else { - script! {} - } -} - -/// Convert a limb to big-endian bits but store them in the altstack for now -/// Adapted from https://github.com/BitVM/BitVM/blob/main/src/bigint/bits.rs -/// due to inability to reconcile the dependency issues between BitVM and stwo. -pub fn limb_to_be_bits_toaltstack(num_bits: u32) -> Script { - if num_bits >= 2 { - script! { - { limb_to_be_bits_common(num_bits) } - OP_TOALTSTACK - OP_TOALTSTACK - } - } else { - script! { - OP_TOALTSTACK - } - } -} diff --git a/tomorrow-night.css b/tomorrow-night.css new file mode 100644 index 0000000..f719792 --- /dev/null +++ b/tomorrow-night.css @@ -0,0 +1,104 @@ +/* Tomorrow Night Theme */ +/* http://jmblog.github.com/color-themes-for-google-code-highlightjs */ +/* Original theme - https://github.com/chriskempson/tomorrow-theme */ +/* http://jmblog.github.com/color-themes-for-google-code-highlightjs */ + +/* Tomorrow Comment */ +.hljs-comment { + color: #969896; 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