62 lines
2.4 KiB
JavaScript
62 lines
2.4 KiB
JavaScript
const { ethers, network } = require('hardhat');
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const { expect } = require('chai');
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const { loadFixture, mineUpTo } = require('@nomicfoundation/hardhat-network-helpers');
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const { impersonate } = require('../helpers/account');
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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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async function fixture() {
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return {
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mock: await ethers.deployContract('$Blockhash'),
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systemSigner: await impersonate(SYSTEM_ADDRESS),
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latestBlock: await ethers.provider.getBlock('latest'),
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};
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}
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describe('Blockhash', function () {
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beforeEach(async function () {
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Object.assign(this, await loadFixture(fixture));
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});
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for (const supported of [true, false]) {
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describe(`${supported ? 'supported' : 'unsupported'} chain`, function () {
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beforeEach(async function () {
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if (supported) {
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await this.systemSigner.sendTransaction({ to: HISTORY_STORAGE_ADDRESS, data: this.latestBlock.hash });
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} else {
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// `setCode` in hardhat-network-helpers doesn't support empty code :/
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await network.provider.request({ method: 'hardhat_setCode', params: [HISTORY_STORAGE_ADDRESS, '0x'] });
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}
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});
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it('recent block', async function () {
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// fast forward (less than blockhash serve window)
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await mineUpTo(this.latestBlock.number + BLOCKHASH_SERVE_WINDOW);
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await expect(this.mock.$blockHash(this.latestBlock.number)).to.eventually.equal(this.latestBlock.hash);
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});
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it('old block', async function () {
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// fast forward (more than blockhash serve window)
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await mineUpTo(this.latestBlock.number + BLOCKHASH_SERVE_WINDOW + 1);
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await expect(this.mock.$blockHash(this.latestBlock.number)).to.eventually.equal(
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supported ? this.latestBlock.hash : ethers.ZeroHash,
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);
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});
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it('very old block', async function () {
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// fast forward (more than history serve window)
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await mineUpTo(this.latestBlock.number + HISTORY_SERVE_WINDOW + 10);
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await expect(this.mock.$blockHash(this.latestBlock.number)).to.eventually.equal(ethers.ZeroHash);
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});
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it('future block', async function () {
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// check history access in the future
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await expect(this.mock.$blockHash(this.latestBlock.number + 10)).to.eventually.equal(ethers.ZeroHash);
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});
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});
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}
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});
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