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btcStructs.cxx
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btcStructs.cxx
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/* btcStructs.cxx */
/* ====================================================================
* INCLUDE ALL BITCOIN RELATED CLASSES FOR THIS PROJECT.
* DO NOT USE DIRECTLY; ONLY USE BY INCLUDING.
* ====================================================================
*
* CLASSES EXPLAINED:
*
* #1 UTXO:
* A UTXO object will store all information about an Unspent Transaction
* Output which can be used as an input(source of funds) for a new
* transaction. The class has various member functions to automatically
* generate serialized data parts related to inputs inside the raw
* transaction data recorded on the Blockchain.
*
* #
*
*
*/
#include "btcStructs.h"
#include "btcTools.h"
#include <boost/multiprecision/cpp_int.hpp>
#include <openssl/bn.h>
#include <openssl/obj_mac.h>
#include <openssl/ec.h>
#include <iostream>
#include <fstream>
#include <string>
#include <vector>
#include <sstream>
#include <cmath>
using namespace std;
using namespace boost::multiprecision;
typedef vector<unsigned char>::iterator vbit;
UTXO::UTXO(string id, string add, string sp, int ix, double amt) {
txid = id;
address = add;
spendable = sp;
index = ix;
amount = amt * 100000000;
}
bool UTXO::good() {
if (spendable == "YES")
{return true;}
else {return false;}
}
double UTXO::get_balance() {
double balance = amount;
balance = balance / 100000000;
return balance;
}
void UTXO::print_info() {
cout << "\nTXID: " << txid << "\nIndex: " << index;
cout << "\nPay to Address: " << address;
cout << "\nAmount: " << amount << " Satoshis";
cout << "\nSpendable: " << spendable << "\n" << endl;
}
void UTXO::export_to_file(ofstream& t_ufile) {
t_ufile << txid << " " << address << " " << spendable << " ";
double dmt = amount;
dmt /= 100000000;
t_ufile << index << " " << dmt << "\n";
}
void UTXO::pkhash_decode(unsigned char* pkhout) {
const string decoder = "123456789ABCDEFGHJKLMNPQRSTUVWXYZabcdefghijkmnopqrstuvwxyz";
size_t adlen = address.length();
uint256_t bigN, chunk, cbyte;
int value;
for (size_t i = 0; i < adlen; ++i) {
value = decoder.find(address[i]);
chunk = 58;
chunk = pow(chunk, adlen - 1 - i) * value;
bigN += chunk;
}
unsigned char ibyte;
for (int j = 0; j < 20; ++j) {
cbyte = (bigN >> (23 - j) * 8) & 0xFF;
while (cbyte > 0) {++ibyte; --cbyte;}
pkhout[j] = ibyte;
ibyte = 0;
}
}
void UTXO::fetch_private(vector<string>& t_wif_set, unsigned char* keyout) {
uint256_t real_key, chunk;
for (vector<string>::iterator si = t_wif_set.begin(); si != t_wif_set.end(); ++si) {
if (wif_comp_to_pkh(*si) == address) {
real_key = wif_to_priv(*si);
break;
}
}
unsigned char ibyte;
for (int i = 0; i < 32; ++i) {
chunk = (real_key >> ((31 - i) * 8)) & 0xFF;
while (chunk > 0) {++ibyte; --chunk;}
keyout[i] = ibyte;
ibyte = 0;
}
}
void UTXO::bc_partial_serial(unsigned char* icout) {
// partial size = 32 + 4 = 36.
uint64_t id1, id2, id3, id4;
string ids1 = txid.substr(0, 16);
string ids2 = txid.substr(16, 16);
string ids3 = txid.substr(32, 16);
string ids4 = txid.substr(48, 16);
stringstream(ids1) >> hex >> id1;
stringstream(ids2) >> hex >> id2;
stringstream(ids3) >> hex >> id3;
stringstream(ids4) >> hex >> id4;
for (int i = 0; i < 8; ++i) {
icout[i] = (id4 >> i * 8) & 0xFF;
icout[i + 8] = (id3 >> i * 8) & 0xFF;
icout[i + 16] = (id2 >> i * 8) & 0xFF;
icout[i + 24] = (id1 >> i * 8) & 0xFF;
}
uint64_t ix = index;
for (int i = 0; i < 4; ++i) {icout[i + 32] = (ix >> i * 8) & 0xFF;}
}
void UTXO::ac_partial_serial(unsigned char* t_secret, unsigned char* acout) {
// partial size = 1 + 33(1 + 32) + 4 = 38.
unsigned char* pubkey = new unsigned char[33];
EC_GROUP* ecgroup = EC_GROUP_new_by_curve_name(NID_secp256k1);
EC_POINT* ecpoint = EC_POINT_new(ecgroup);
BN_CTX* bnctx = BN_CTX_new();
BIGNUM* priv_bn = BN_bin2bn(t_secret, 32, NULL);
EC_POINT_mul(ecgroup, ecpoint, priv_bn, NULL, NULL, bnctx);
EC_POINT_point2oct(ecgroup, ecpoint, POINT_CONVERSION_COMPRESSED,
pubkey, 33, bnctx);
acout[0] = 0x21;
for (int i = 0; i < 33; ++i)
{acout[1 + i] = pubkey[i];}
acout[34] = 0xFF;
acout[35] = 0xFF;
acout[36] = 0xFF;
acout[37] = 0xFF;
}
void UTXO::input_serial(unsigned char* sout) {
// input size = 32 + 4 + 1 + 25 + 4 = 66.
uint64_t id1, id2, id3, id4;
string ids1 = txid.substr(0, 16);
string ids2 = txid.substr(16, 16);
string ids3 = txid.substr(32, 16);
string ids4 = txid.substr(48, 16);
stringstream(ids1) >> hex >> id1;
stringstream(ids2) >> hex >> id2;
stringstream(ids3) >> hex >> id3;
stringstream(ids4) >> hex >> id4;
for (int i = 0; i < 8; ++i) {
sout[i] = (id4 >> i * 8) & 0xFF;
sout[i + 8] = (id3 >> i * 8) & 0xFF;
sout[i + 16] = (id2 >> i * 8) & 0xFF;
sout[i + 24] = (id1 >> i * 8) & 0xFF;
}
uint64_t ix = index;
for (int i = 0; i < 4; ++i) {sout[i + 32] = (ix >> i * 8) & 0xFF;}
sout[36] = 0x19;
sout[37] = 0x76;
sout[38] = 0xa9;
sout[39] = 0x14;
unsigned char* pkh = new unsigned char[20];
this->pkhash_decode(pkh);
for (int i = 0; i < 20; ++i) {sout[i + 40] = pkh[i];}
sout[60] = 0x88;
sout[61] = 0xac;
sout[62] = 0xff;
sout[63] = 0xff;
sout[64] = 0xff;
sout[65] = 0xff;
}