使用 web3.py 计算令牌对的 LP 地址

Question

经过几个小时的搜索，我设法运行了这段代码，但不幸的是，这并没有产生我想要的输出，即在 (TOKEN/BNB LP) 中获取 LP 池地址。

给定令牌地址： 0xe56842ed550ff2794f010738554db45e60730371

我想获取 BIN/BNB 矿池地址： 0xe432afB7283A08Be24E9038C30CA6336A7cC8218 。

任何想法可能是什么问题？

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

"""
Contract: 0xe56842ed550ff2794f010738554db45e60730371
BIN/BNB Address: 0xe432afB7283A08Be24E9038C30CA6336A7cC8218
BIN/BNB LP URL: https://bscscan.com/token/0xe432afB7283A08Be24E9038C30CA6336A7cC8218#balances
"""

CONTRACTS = {"CONTRACT": "0xe56842ed550ff2794f010738554db45e60730371",}

PANCAKE_SWAP_FACTORY = "0xcA143Ce32Fe78f1f7019d7d551a6402fC5350c73"
PANCAKE_SWAP_ROUTER  = "0x10ED43C718714eb63d5aA57B78B54704E256024E"
WBNB_ADDRESS = "0xbb4CdB9CBd36B01bD1cBaEBF2De08d9173bc095c"

hexadem_= '0x96e8ac4277198ff8b6f785478aa9a39f403cb768dd02cbee326c3e7da348845f'
factory = PANCAKE_SWAP_FACTORY
abiEncoded_1 = encode_abi_packed(['address', 'address'], (CONTRACTS['CONTRACT'], WBNB_ADDRESS))
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(), hexadem_])[12:]

# resPair is the address for the pancakeswap CONTRACT /WBNB pair
print("Token Contract: ", CONTRACTS)
print("BNB-LP Address: ", resPair.hex())    #-- expecting to get  0xe432afB7283A08Be24E9038C30CA6336A7cC8218

当前输出：

BNB-LP Address:  0xde173b8a63b9641a531de0fbb1c5c9eee3b4bc0c

预期输出：

Token Contract:  0xe56842ed550ff2794f010738554db45e60730371
BNB-LP Address:  0xe432afB7283A08Be24E9038C30CA6336A7cC8218   #-- correct LP Address

Answer 1

您需要按字母顺序输入两个硬币。

pair_traded = [token_a, token_b] #token_a, token_b are the address's
pair_traded.sort()

hexadem_1 = 0xff
abiEncoded_1 = encode_abi_packed(['address', 'address'], (token_list[0], token_list[1] ))
salt_ = w3.solidityKeccak(['bytes'], ['0x' +abiEncoded_1.hex()])
abiEncoded_2 = encode_abi_packed([ 'address', 'bytes32'], ( factory, salt_))
pair_address = w3.solidityKeccak(['bytes','bytes'], ['0xff' + abiEncoded_2.hex(), pair_code_hash])[12:]

Answer 2

对于 Pancake Swap，我认为 hexadem_ 应该是这样的： hexadem_= '0x00fb7f630766e6a796048ea87d01acd3068e8ff67d078148a3fa3f4a84f69bd5' ## Pancake SWAP

您的代码中的一个用于 UniSwap

Answer 3

hexadem_ = '0x00fb7f630766e6a796048ea87d01acd3068e8ff67d078148a3fa3f4a84f69bd5' # This is pancake right hex。
factory = PANCAKE_SWAP_FACTORY
abiEncoded_1 = encode_abi_packed(['address', 'address'], (CONTRACTS['CONTRACT'], WBNB_ADDRESS))
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(), hexadem_])[12:]

但是我输出的值和你的不一样，我的输出值：

Token Contract:  {'CONTRACT': '0xe56842ed550ff2794f010738554db45e60730371'}
BNB-LP Address:  0xdbb161367d9a2a852ebeef3cbfcbf2c43b85064b

Answer 4

我发现你需要确保两个地址都是小写或大写。 这在排序时会有所不同。 这对我有用：

def compute_pool_address(self, token_address_a, token_address_b):
    pair_traded = [token_address_a.lower(), token_address_b.lower()]
    pair_traded.sort()
    hexadem = '0x00fb7f630766e6a796048ea87d01acd3068e8ff67d078148a3fa3f4a84f69bd5'
    abiEncoded_1 = encode_abi_packed(['address', 'address'], (pair_traded[0], pair_traded[1]))
    salt_ = self.web3.solidityKeccak(['bytes'], ['0x' + abiEncoded_1.hex()])
    abiEncoded_2 = encode_abi_packed(['address', 'bytes32'], (PANCAKE_FACTORY_ADDRESS, salt_))
    return self.web3.toChecksumAddress(self.web3.solidityKeccak(['bytes', 'bytes'], ['0xff' + abiEncoded_2.hex(), hexadem])[12:])

（self.web3 是一个 web3.py Web3 实例）

Answer 5

在尝试重新创建 uniswap 合约的功能时，我遇到了类似的问题。 当我在表达式中使用 eth_abi.abi.encode(python) 函数时，它已解决。

Solidity 编码我想要的：

keccak256(
  abi.encodePacked(
    hex'ff',
    factory,
    keccak256(abi.encode(key.token0, key.token1, key.fee)),
    POOL_INIT_CODE_HASH
  )
)

产生相同结果的 Python 代码：

encoded_internal_data = abi.encode(['address', 'address', 'uint24'], (token0, token1, fee))
key_hash = web3.solidityKeccak(['bytes'], [encoded_internal_data])
encoded_full_data = encode_abi_packed(
    ["bytes1", "address", "bytes", "bytes"],
    (HexBytes('ff'), UNISWAPV3_FACTORY_ADDRESS, key_hash, HexBytes(UNISWAPV3_POOL_INIT_CODE_HASH))
)
pair_address = web3.solidityKeccak(['bytes'], [encoded_full_data])[12:].hex()