通过 python3 计算 uniswap 3.0 池（对）地址答案

【问题标题】：Compute uniswap 3.0 pool (pair) address via python3通过 python3 计算 uniswap 3.0 池（对）地址
【发布时间】：2021-10-06 21:22:30
【问题描述】：

我对如何计算有点困惑新的 uniswap 版本 3 池（早期版本称为 pair）地址基于1和2

【问题讨论】：

标签： python-3.x ethereum solidity

【解决方案1】：

在新的 uniswap v3.0 中还有一个额外的参数用于计算池地址 - 费用百分比，定义如sdk 使用 uint24 类型。来自sdk`s computePoolAddress第一时间入驻由于计算池地址问题有一个让我感到困惑的部分来源

[defaultAbiCoder.encode(['address', 'address', 'uint24'], [token0.address, token1.address, fee])

为什么我决定使用encodePacked（即encode_abi_packed for python3 from eth_abi.packed）函数来计算它。但它产生了错误的结果。深入了解 uniswap v3.0 外围池合同 - 3 已澄清我的错。结果在 3.0 版中使用了 encode（即 encode_abi 用于来自 eth_abi 的 python3）函数。多一点解释here

所以，把所有的东西结合在一起。

借助python3计算池地址的主函数。

from web3 import Web3
from eth_abi.packed import encode_abi_packed
from eth_abi import encode_abi

def compute_pairs_address_with_target_v3(factory = '0x1F98431c8aD98523631AE4a59f267346ea31F984', token_0 = None, token_1 = None, fee = 3000):
    POOL_INIT_CODE_HASH = '0xe34f199b19b2b4f47f68442619d555527d244f78a3297ea89325f843f87b8b54'
    token_0 = Web3.toChecksumAddress(token_0)
    token_1 = Web3.toChecksumAddress(token_1)
    abiEncoded_1 = encode_abi(['address', 'address', 'uint24'], (token_0, token_1, fee )) if int(token_0,16)<int(token_1,16) else encode_abi(['address', 'address', 'uint24'], (token_1, token_0, fee ))
    salt = Web3.solidityKeccak(['bytes'], ['0x' +abiEncoded_1.hex()])
    abiEncoded_2 = encode_abi_packed([ 'address', 'bytes32'], ( factory, salt))
    resPair = Web3.solidityKeccak(['bytes','bytes'], ['0xff' + abiEncoded_2.hex(), POOL_INIT_CODE_HASH])[12:]
    return(resPair.hex())

测试它，基于4 和5

factoryAddress = '0x1111111111111111111111111111111111111111'
token0 = '0xA0b86991c6218b36c1d19D4a2e9Eb0cE3606eB48'
token1 = '0x6B175474E89094C44Da98b954EedeAC495271d0F'
fee = 500 #https://docs.uniswap.org/sdk/reference/enums/FeeAmount#low
targetPoolAddress = '0x90B1b09A9715CaDbFD9331b3A7652B24BfBEfD32'
assert(targetPoolAddress.lower() == compute_pairs_address_with_target_v3(factory = factoryAddress, token_0 = token0, token_1 = token1, fee = fee).lower())

token0 = '0x7d1afa7b718fb893db30a3abc0cfc608aacfebb0'
token1 = '0xc02aaa39b223fe8d0a0e5c4f27ead9083c756cc2'
factoryAddress = '0x1F98431c8aD98523631AE4a59f267346ea31F984'
fee = 3000 #https://docs.uniswap.org/sdk/reference/enums/FeeAmount#medium
targetPoolAddress = '0x290a6a7460b308ee3f19023d2d00de604bcf5b42' #WETH /MATIC 0.3 % fee
assert(targetPoolAddress.lower() == compute_pairs_address_with_target_v3(factory = factoryAddress, token_0 = token0, token_1 = token1, fee = fee).lower())

【讨论】：