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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -1,6 +1,137 @@ | ||
| import { loadFixture, time } from '@nomicfoundation/hardhat-network-helpers'; | ||
| import { expect } from 'chai'; | ||
| import { ethers } from 'hardhat'; | ||
| import { deployFullSuiteFixture } from '../fixtures/deploy-full-suite.fixture'; | ||
| import { Token } from '../../typechain-types'; | ||
| import { SignerWithAddress } from '@nomicfoundation/hardhat-ethers/signers'; | ||
|
|
||
| describe('Token - Permit', () => { | ||
| const value = 42n; | ||
| const nonce = 0n; | ||
| const maxDeadline = ethers.MaxUint256; | ||
|
|
||
| async function getDomain(token: Token) { | ||
| return { | ||
| chainId: (await ethers.provider.getNetwork()).chainId, | ||
| verifyingContract: token.target.toString(), | ||
| name: await token.name(), | ||
| version: '1', | ||
| }; | ||
| } | ||
|
|
||
| async function buildData(token: Token, owner: SignerWithAddress, spender: SignerWithAddress, deadline = maxDeadline) { | ||
| const domain = await getDomain(token); | ||
| const types = { | ||
| Permit: [ | ||
| { name: 'owner', type: 'address' }, | ||
| { name: 'spender', type: 'address' }, | ||
| { name: 'value', type: 'uint256' }, | ||
| { name: 'nonce', type: 'uint256' }, | ||
| { name: 'deadline', type: 'uint256' }, | ||
| ], | ||
| }; | ||
| const message = { | ||
| owner: owner.address, | ||
| spender: spender.address, | ||
| value, | ||
| nonce, | ||
| deadline, | ||
| }; | ||
|
|
||
| return { domain, types, message }; | ||
| } | ||
|
|
||
| describe('Initial state', () => { | ||
| it('initial nonce is 0', async () => { | ||
| const { | ||
| suite: { token }, | ||
| accounts: { aliceWallet, bobWallet, anotherWallet }, | ||
| } = await loadFixture(deployFullSuiteFixture); | ||
|
|
||
| expect(await token.nonces(aliceWallet)).to.equal(0n); | ||
| expect(await token.nonces(bobWallet)).to.equal(0n); | ||
| expect(await token.nonces(anotherWallet)).to.equal(0n); | ||
| }); | ||
|
|
||
| it('domain separator', async () => { | ||
| const { | ||
| suite: { token }, | ||
| } = await loadFixture(deployFullSuiteFixture); | ||
|
|
||
| const hashedDomain = ethers.TypedDataEncoder.hashDomain(await getDomain(token)); | ||
|
|
||
| expect(await token.DOMAIN_SEPARATOR()).to.equal(hashedDomain); | ||
| }); | ||
| }); | ||
|
|
||
| describe('Permit', () => { | ||
| it('accepts owner signature', async () => { | ||
| const { | ||
| suite: { token }, | ||
| accounts: { aliceWallet, bobWallet }, | ||
| } = await loadFixture(deployFullSuiteFixture); | ||
|
|
||
| const { v, r, s } = await buildData(token, aliceWallet, bobWallet) | ||
| .then(({ domain, types, message }) => aliceWallet.signTypedData(domain, types, message)) | ||
| .then(ethers.Signature.from); | ||
|
|
||
| await token.permit(aliceWallet, bobWallet, value, maxDeadline, v, r, s); | ||
|
|
||
| expect(await token.nonces(aliceWallet)).to.equal(1n); | ||
| expect(await token.allowance(aliceWallet, bobWallet)).to.equal(value); | ||
| }); | ||
|
|
||
| it('rejects reused signature', async () => { | ||
| const { | ||
| suite: { token }, | ||
| accounts: { aliceWallet, bobWallet }, | ||
| } = await loadFixture(deployFullSuiteFixture); | ||
|
|
||
| const { v, r, s, serialized } = await buildData(token, aliceWallet, bobWallet) | ||
| .then(({ domain, types, message }) => aliceWallet.signTypedData(domain, types, message)) | ||
| .then(ethers.Signature.from); | ||
|
|
||
| await token.permit(aliceWallet, bobWallet, value, maxDeadline, v, r, s); | ||
|
|
||
| const recovered = await buildData(token, aliceWallet, bobWallet).then(({ domain, types, message }) => | ||
| ethers.verifyTypedData(domain, types, { ...message, nonce: nonce + 1n, deadline: maxDeadline }, serialized), | ||
| ); | ||
|
|
||
| await expect(token.permit(aliceWallet, bobWallet, value, maxDeadline, v, r, s)) | ||
| .to.be.revertedWithCustomError(token, 'ERC2612InvalidSigner') | ||
| .withArgs(recovered, aliceWallet); | ||
| }); | ||
|
|
||
| it('rejects other signature', async () => { | ||
| const { | ||
| suite: { token }, | ||
| accounts: { aliceWallet, bobWallet }, | ||
| } = await loadFixture(deployFullSuiteFixture); | ||
|
|
||
| const { v, r, s } = await buildData(token, aliceWallet, bobWallet) | ||
| .then(({ domain, types, message }) => bobWallet.signTypedData(domain, types, message)) | ||
| .then(ethers.Signature.from); | ||
|
|
||
| await expect(token.permit(aliceWallet, bobWallet, value, maxDeadline, v, r, s)) | ||
| .to.be.revertedWithCustomError(token, 'ERC2612InvalidSigner') | ||
| .withArgs(bobWallet, aliceWallet); | ||
| }); | ||
|
|
||
| it('rejects expired permit', async () => { | ||
| const { | ||
| suite: { token }, | ||
| accounts: { aliceWallet, bobWallet }, | ||
| } = await loadFixture(deployFullSuiteFixture); | ||
|
|
||
| const deadline = (await time.latest().then(ethers.toBigInt)) - BigInt(time.duration.weeks(1)); | ||
|
|
||
| const { v, r, s } = await buildData(token, aliceWallet, bobWallet, deadline) | ||
| .then(({ domain, types, message }) => aliceWallet.signTypedData(domain, types, message)) | ||
| .then(ethers.Signature.from); | ||
|
|
||
| await expect(token.permit(aliceWallet, bobWallet, value, deadline, v, r, s)) | ||
| .to.be.revertedWithCustomError(token, 'ERC2612ExpiredSignature') | ||
| .withArgs(deadline); | ||
| }); | ||
| }); | ||
| }); | ||
