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，即获取（TOKEN/BNB LP）中的 LP 池地址。

给定令牌地址：0xe56842ed550ff2794f010738554db45e60730371

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

有什么想法可能是什么问题吗？

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

电流输出：

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这两个硬币。

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:]