Explore the mysteries of the blockchain world with Python: Revealing how blockchain works

pip install WEB3 pip install eth-account

from web3 import Web3 # 连接到本地Geth节点 web3 = Web3(Web3.HttpProvider("http://127.0.0.1:8545"))

# 获取区块链当前的高度 block_number = web3.eth.block_number print("区块链当前的高度：", block_number) # 获取最新区块的信息 latest_block = web3.eth.get_block("latest") print("最新区块的信息：", latest_block) # 获取指定区块号的区块信息 block_number = 1000 block = web3.eth.get_block(block_number) print("指定区块号的区块信息：", block)

from eth_account import Account # 创建一个账户 account = Account.create() # 获取账户的地址 address = account.address print("账户的地址：", address) # 获取账户的私钥 private_key = account.private_key print("账户的私钥：", private_key) # 创建一个交易 transaction = { "nonce": web3.eth.get_transaction_count(address), "to": "0x0000000000000000000000000000000000000000", "value": 1000000000000000000, "gas": 21000, "gas_price": web3.eth.gas_price } # 签名交易 signed_transaction = web3.eth.account.sign_transaction(transaction, private_key) # 发送交易 tx_hash = web3.eth.send_raw_transaction(signed_transaction.rawTransaction) # 等待交易确认 receipt = web3.eth.wait_for_transaction_receipt(tx_hash) # 打印交易收据 print("交易收据：", receipt)

from solc import compile_source # 编译智能合约代码 contract_source_code = """ pragma solidity ^0.4.24; contract Greeter { string public greeting; constructor() public { greeting = "Hello, World!"; } function greet() public view returns (string) { return greeting; } } """ compiled_contract = compile_source(contract_source_code) contract_abi = compiled_contract["contracts"]["Greeter"]["abi"] contract_bytecode = compiled_contract["contracts"]["Greeter"]["bin"] # 部署智能合约 contract = web3.eth.contract(abi=contract_abi, bytecode=contract_bytecode) tx_hash = contract.deploy({"from": address}) # 等待交易确认 receipt = web3.eth.wait_for_transaction_receipt(tx_hash) # 获取智能合约的地址 contract_address = receipt.contractAddress # 调用智能合约的函数 greeting = contract.functions.greet().call() # 打印智能合约返回的结果 print("智能合约返回的结果：", greeting)