内置属性

blockhash(uint blockNumber) returns (bytes32)：指定区块的区块哈希——仅可用于最新的 256 个区块且不包括当前区块
block.chainid (uint): 当前链 id
block.coinbase ( address ): 挖出当前区块的矿工地址
block.difficulty ( uint ): 当前区块难度
block.gaslimit ( uint ): 当前区块 gas 限额
block.number ( uint ): 当前区块号
block.timestamp ( uint): 自 unix epoch 起始当前区块以秒计的时间戳
gasleft() returns (uint256) ：剩余的 gas
msg.data ( bytes ): 完整的 calldata
msg.sender ( address ): 消息发送者（当前调用）
msg.sig ( bytes4 ): calldata 的前 4 字节（也就是函数标识符）
msg.value ( uint ): 随消息发送的 wei 的数量
tx.gasprice (uint): 交易的 gas 价格
tx.origin (address payable): 交易发起者（完全的调用链）

// SPDX-License-Identifier: GPL-3.0
pragma solidity >=0.6.0 <0.9.0;
import "hardhat/console.sol";

contract Internal{
    constructor() payable {
        console.log("blockhash:");
        console.logBytes32(blockhash(block.number));
        console.log("chain id:",block.chainid);
        console.log("coinbase:",block.coinbase);
        console.log("difficulty:",block.difficulty);
        console.log("gaslimit:",block.gaslimit);
        console.log("number:",block.number);
        console.log("gasleft():",gasleft());
        console.log("msg.data:");
        console.logBytes(msg.data);
        console.log("msg.sender:",msg.sender);
        console.log("msg.sig:");
        console.logBytes4(msg.sig);
        console.log("msg.value:",msg.value);
        console.log("gasprice:",tx.gasprice);
        console.log("tx.origin:",tx.origin);
    }
}

const { expect } = require("chai");
const { ethers } = require("hardhat");


describe("contract", function () {
  it("test", async function () {
    const MyContract = await ethers.getContractFactory("Internal");
    const myContract = await MyContract.deploy();
  });
});

  contract
blockhash:
0x0000000000000000000000000000000000000000000000000000000000000000
chain id: 31337
coinbase: 0xc014ba5ec014ba5ec014ba5ec014ba5ec014ba5e
difficulty: 131072
gaslimit: 30000000
number: 1
gasleft(): 144366
msg.data:
0x
msg.sender: 0xf39fd6e51aad88f6f4ce6ab8827279cfffb92266
msg.sig:
0x00000000
msg.value: 0
gasprice: 1875000000
tx.origin: 0xf39fd6e51aad88f6f4ce6ab8827279cfffb92266