从 ERC-20 代币地址获取有关代币的详细信息

Question

我真的是 Web3 开发的新手，想知道是否有办法从智能合约中找到的令牌地址获取有关令牌的更多信息（即我有一个令牌地址，但不知道它是什么类型的令牌，直到我在 etherscan 上查找交易哈希）。 这些信息是我可以直接从区块链/Web3 模块中提取的，还是我需要使用外部 API 来收集这些信息？

Answer 1

您可以使用 web3py 直接获取令牌详细信息

这是获取 Token 名称的简单示例（在本例中为Strong ）

import json
from web3 import Web3

# Fill in your infura API key here
infura_url = "https://mainnet.infura.io/v3/YOUR_INFURA_API_KEY_GOES_HERE"

web3 = Web3(Web3.HTTPProvider(infura_url))

# Get it from Etherscan and change true => True and false => False
abi = [{"inputs":[{"internalType":"address[]","name":"addresses","type":"address[]"},{"internalType":"uint256[]","name":"balances","type":"uint256[]"}],"stateMutability":"nonpayable","type":"constructor"},{"anonymous":False,"inputs":[{"indexed":True,"internalType":"address","name":"owner","type":"address"},{"indexed":True,"internalType":"address","name":"spender","type":"address"},{"indexed":False,"internalType":"uint256","name":"value","type":"uint256"}],"name":"Approval","type":"event"},{"anonymous":False,"inputs":[{"indexed":True,"internalType":"address","name":"from","type":"address"},{"indexed":True,"internalType":"address","name":"to","type":"address"},{"indexed":False,"internalType":"uint256","name":"value","type":"uint256"}],"name":"Transfer","type":"event"},{"inputs":[{"internalType":"address","name":"owner","type":"address"},{"internalType":"address","name":"spender","type":"address"}],"name":"allowance","outputs":[{"internalType":"uint256","name":"","type":"uint256"}],"stateMutability":"view","type":"function"},{"inputs":[{"internalType":"address","name":"spender","type":"address"},{"internalType":"uint256","name":"amount","type":"uint256"}],"name":"approve","outputs":[{"internalType":"bool","name":"","type":"bool"}],"stateMutability":"nonpayable","type":"function"},{"inputs":[{"internalType":"address","name":"account","type":"address"}],"name":"balanceOf","outputs":[{"internalType":"uint256","name":"","type":"uint256"}],"stateMutability":"view","type":"function"},{"inputs":[],"name":"decimals","outputs":[{"internalType":"uint8","name":"","type":"uint8"}],"stateMutability":"view","type":"function"},{"inputs":[{"internalType":"address","name":"spender","type":"address"},{"internalType":"uint256","name":"subtractedValue","type":"uint256"}],"name":"decreaseAllowance","outputs":[{"internalType":"bool","name":"","type":"bool"}],"stateMutability":"nonpayable","type":"function"},{"inputs":[{"internalType":"address","name":"spender","type":"address"},{"internalType":"uint256","name":"addedValue","type":"uint256"}],"name":"increaseAllowance","outputs":[{"internalType":"bool","name":"","type":"bool"}],"stateMutability":"nonpayable","type":"function"},{"inputs":[],"name":"name","outputs":[{"internalType":"string","name":"","type":"string"}],"stateMutability":"view","type":"function"},{"inputs":[],"name":"symbol","outputs":[{"internalType":"string","name":"","type":"string"}],"stateMutability":"view","type":"function"},{"inputs":[],"name":"totalSupply","outputs":[{"internalType":"uint256","name":"","type":"uint256"}],"stateMutability":"view","type":"function"},{"inputs":[{"internalType":"address","name":"recipient","type":"address"},{"internalType":"uint256","name":"amount","type":"uint256"}],"name":"transfer","outputs":[{"internalType":"bool","name":"","type":"bool"}],"stateMutability":"nonpayable","type":"function"},{"inputs":[{"internalType":"address","name":"sender","type":"address"},{"internalType":"address","name":"recipient","type":"address"},{"internalType":"uint256","name":"amount","type":"uint256"}],"name":"transferFrom","outputs":[{"internalType":"bool","name":"","type":"bool"}],"stateMutability":"nonpayable","type":"function"}]

address = '0x990f341946A3fdB507aE7e52d17851B87168017c'

contract = web3.eth.contract(address=address, abi=abi)

# Let's print Name of Token
print(contract.functions.name().call())