Python UniswapX SDK

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Project Information

Code Quality

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Release Notes

V0.0.2

• Exclusive Dutch Order Encoder
• Reactor Execute Encoder
• Get Orders from UniswapX API
• Integration Tests
• Documentation

V0.0.1

• Exclusive Dutch Order Decoder
• Order Resolver

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Overview and Points of Attention

This library is a Python SDK that can be used to easily interact with UniswapX ecosystem: Reactors, Quoter, API. It's partially inspired by https://github.com/Uniswap/uniswapx-sdk

⚠ This library has not been audited, so use at your own risk !

⚠ The API currently exposed is very likely to change with the following versions: consider forcing the version.

⚠ This project is a work in progress so not all features have already been implemented.

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Installation

A good practice is to use Python virtual environments, here is a tutorial.

The library can be pip installed from pypi.org as usual:

# update pip to latest version if needed
pip install -U pip

# install the decoder from pypi.org
pip install uniswapx-sdk

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Usage

How to encode an Exclusive Ducth Order

First, you need to import the classes that will help you to structure the encoding, along with a function that will compute the order nonce:

from uniswapx_sdk.encoder import (
    DecayTime,    
    ExclusiveDutchOrderInfo,
    ExclusiveDutchOrderInput,
    ExclusiveDutchOrderOutput,
    ExclusiveFiller,
    get_nonce,
)

Then you instantiate them:

order_info = ExclusiveDutchOrderInfo(
    reactor="0x6000da47483062a0d734ba3dc7576ce6a0b645c4",
    swapper="0x...",  # your account address
    nonce=get_nonce(),
    deadline=deadline,  # Unix timestamp after which the order won't be valid any more.
)

decay_time = DecayTime(start_timestamp, end_timestamp)

dutch_input = ExclusiveDutchOrderInput(in_token_address, start_amount_in_wei, end_amount_in_wei)

dutch_outputs = (
    ExclusiveDutchOrderOutput(
        token=out_token_address,  # or '0x0000000000000000000000000000000000000000' for native coin
        start_amount=start_amount_in_wei,
        end_amount=end_amount_in_wei,
        recipient=recipient_address,  # who is going to receive the output
    ),
)

exclusive_filler = ExclusiveFiller(filler_address, bps)  # the exclusive filler if any with the override bps
#  or exclusive_filler = ExclusiveFiller() if no exclusive filler

And now you're ready to encode the order and sign it:

import ExclusiveDutchOrderEncoder

encoder = ExclusiveDutchOrderEncoder(chain_id)
encoded_order, signable_message = encoder.encode_order(
    order_info,
    decay_time,
    dutch_input,
    dutch_outputs,
    exclusive_filler
)
signed_message = your_account.sign_message(signable_message)

How to resolve/validate/quote an order

Let's say you have en encoded order along with its signature sig. Resolving it is as simple as:

from uniswapx_sdk.resolver import OrderResolver

resolver = await OrderResolver.create(rpc_endpoint="https://...")
resolved_order = asyncio.run(resolver.resolve(order, sig))

How to decode an order

Let's say you have en encoded order. Decoding it is as simple as:

from uniswapx_sdk.decoder import ExclusiveDutchOrderDecoder

decoder = ExclusiveDutchOrderDecoder()
decoded_order = decoder.decode(encoded_order)

How to get orders from UniswapX API

from uniswapx_sdk.api import UniswapXAPI

api = UniswapXAPI(chain_id)
orders = await api.get_orders(order_status)  # with order_status in open, expired, error, cancelled, filled, insufficient-funds

How to fill an order

Let's say you want to fill (execute) a dutch order. First you encode it as follows:

from uniswapx_sdk.encoder import ExclusiveDutchOrderEncoder

encoded_input = ExclusiveDutchOrderEncoder.encode_execute(order, sig)  # where sig is the signature corresponding to the order

Then you include the encoded_input in the transaction you sign and send to the Exclusive Dutch Order Reactor.