77 lines
2.7 KiB
JavaScript
77 lines
2.7 KiB
JavaScript
const { ethers } = require('hardhat');
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const { expect } = require('chai');
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const { loadFixture, mine, mineUpTo, setCode } = require('@nomicfoundation/hardhat-network-helpers');
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const { impersonate } = require('../helpers/account');
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async function fixture() {
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const mock = await ethers.deployContract('$Blockhash');
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return { mock };
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}
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const HISTORY_STORAGE_ADDRESS = '0x0000F90827F1C53a10cb7A02335B175320002935';
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const SYSTEM_ADDRESS = '0xfffffffffffffffffffffffffffffffffffffffe';
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const HISTORY_SERVE_WINDOW = 8191;
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const BLOCKHASH_SERVE_WINDOW = 256;
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describe('Blockhash', function () {
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before(async function () {
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Object.assign(this, await loadFixture(fixture));
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impersonate(SYSTEM_ADDRESS);
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this.systemSigner = await ethers.getSigner(SYSTEM_ADDRESS);
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});
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it('recent block', async function () {
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await mine();
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const mostRecentBlock = (await ethers.provider.getBlock('latest')).number;
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const blockToCheck = mostRecentBlock - 1;
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const fetchedHash = (await ethers.provider.getBlock(blockToCheck)).hash;
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await expect(this.mock.$blockHash(blockToCheck)).to.eventually.equal(fetchedHash);
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});
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it('old block', async function () {
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await mine();
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const mostRecentBlock = await ethers.provider.getBlock('latest');
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// Call the history address with the most recent block hash
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await this.systemSigner.sendTransaction({
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to: HISTORY_STORAGE_ADDRESS,
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data: mostRecentBlock.hash,
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});
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await mineUpTo(mostRecentBlock.number + BLOCKHASH_SERVE_WINDOW + 10);
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// Verify blockhash after setting history
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await expect(this.mock.$blockHash(mostRecentBlock.number)).to.eventually.equal(mostRecentBlock.hash);
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});
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it('very old block', async function () {
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await mine();
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const mostRecentBlock = await ethers.provider.getBlock('latest');
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await mineUpTo(mostRecentBlock.number + HISTORY_SERVE_WINDOW + 10);
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await expect(this.mock.$blockHash(mostRecentBlock.number)).to.eventually.equal(ethers.ZeroHash);
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});
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it('future block', async function () {
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await mine();
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const mostRecentBlock = await ethers.provider.getBlock('latest');
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const blockToCheck = mostRecentBlock.number + 10;
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await expect(this.mock.$blockHash(blockToCheck)).to.eventually.equal(ethers.ZeroHash);
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});
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it('unsupported chain', async function () {
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await setCode(HISTORY_STORAGE_ADDRESS, '0x00');
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const mostRecentBlock = await ethers.provider.getBlock('latest');
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await mineUpTo(mostRecentBlock.number + BLOCKHASH_SERVE_WINDOW + 10);
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await expect(this.mock.$blockHash(mostRecentBlock.number)).to.eventually.equal(ethers.ZeroHash);
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await expect(this.mock.$blockHash(mostRecentBlock.number + 20)).to.eventually.not.equal(ethers.ZeroHash);
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});
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});
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