通过python计算uniswap对地址

问题描述

我正在尝试计算 Uniswap 对的（离线，即没有 http 请求）地址，使用 python、web3 和 eth-abi 库，基于 this solidity 示例。

address factory = 0x5C69bEe701ef814a2B6a3EDD4B1652CB9cc5aA6f;
address token0 = 0xCAFE000000000000000000000000000000000000; // change me!
address token1 = 0xF00D000000000000000000000000000000000000; // change me!

address pair = address(uint(keccak256(abi.encodePacked(
  hex'ff',factory,keccak256(abi.encodePacked(token0,token1)),hex'96e8ac4277198ff8b6f785478aa9a39f403cb768dd02cbee326c3e7da348845f'
))));

有一些想法：

hexadem_ ='0x96e8ac4277198ff8b6f785478aa9a39f403cb768dd02cbee326c3e7da348845f'
hexadem_1 = 0xff
abiEncoded_1 = encode_abi_packed(['address','address'],(  token_0,token_1 ))
salt_ = web3.Web3.solidityKeccak(['bytes'],['0x' +abiEncoded_1.hex()])
abiEncoded_2 = encode_abi_packed(['bytes','address','bytes32'],(bytes(hexadem_1),salt_))
resPair = web3.Web3.solidityKeccak(['bytes','bytes'],['0x' +abiEncoded_2.hex(),hexadem_])

有人可以给我建议，有什么问题，应该怎么考虑？

解决方法

首先，resPair 太长，不能作为合约地址。可以通过阅读以下内容来解释规则：https://eips.ethereum.org/EIPS/eip-1014

正确的代码如下：

hexadem_ ='0x96e8ac4277198ff8b6f785478aa9a39f403cb768dd02cbee326c3e7da348845f'
hexadem_1 = 0xff
factory = '0x5C69bEe701ef814a2B6a3EDD4B1652CB9cc5aA6f' 
abiEncoded_1 = encode_abi_packed(['address','address'],('0x7825e833d495f3d1c28872415a4aee339d26ac88','0xc02aaa39b223fe8d0a0e5c4f27ead9083c756cc2' )) #these two addresses to be changed as fit. Currently they are TLOS and WETH
salt_ = w3.solidityKeccak(['bytes'],['0x' +abiEncoded_1.hex()])
abiEncoded_2 = encode_abi_packed([ 'address','bytes32'],( factory,salt_))
resPair = w3.solidityKeccak(['bytes','bytes'],['0xff' + abiEncoded_2.hex(),hexadem_])[12:]
resPair

希望这有帮助！我发现这是一个有趣的挑战:)

hex python solidity