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import hre from 'hardhat'
import { Contract } from 'ethers'
import { toRpcHexString } from '@eth-optimism/core-utils'
import {
getContractFactory,
getContractInterface,
} from '@eth-optimism/contracts'
import { SignerWithAddress } from '@nomiclabs/hardhat-ethers/signers'
import { smock, FakeContract } from '@defi-wonderland/smock'
import { expect } from './setup'
import {
findEventForStateBatch,
findFirstUnfinalizedStateBatchIndex,
} from '../src'
describe('helpers', () => {
// Can be any non-zero value, 1000 is fine.
const challengeWindowSeconds = 1000
let signer: SignerWithAddress
before(async () => {
;[signer] = await hre.ethers.getSigners()
})
let FakeBondManager: FakeContract<Contract>
let FakeCanonicalTransactionChain: FakeContract<Contract>
let AddressManager: Contract
let ChainStorageContainer: Contract
let StateCommitmentChain: Contract
beforeEach(async () => {
// Set up fakes
FakeBondManager = await smock.fake(getContractInterface('BondManager'))
FakeCanonicalTransactionChain = await smock.fake(
getContractInterface('CanonicalTransactionChain')
)
// Set up contracts
AddressManager = await getContractFactory(
'Lib_AddressManager',
signer
).deploy()
ChainStorageContainer = await getContractFactory(
'ChainStorageContainer',
signer
).deploy(AddressManager.address, 'StateCommitmentChain')
StateCommitmentChain = await getContractFactory(
'StateCommitmentChain',
signer
).deploy(AddressManager.address, challengeWindowSeconds, 10000000)
// Set addresses in manager
await AddressManager.setAddress(
'ChainStorageContainer-SCC-batches',
ChainStorageContainer.address
)
await AddressManager.setAddress(
'StateCommitmentChain',
StateCommitmentChain.address
)
await AddressManager.setAddress(
'CanonicalTransactionChain',
FakeCanonicalTransactionChain.address
)
await AddressManager.setAddress('BondManager', FakeBondManager.address)
// Set up mock returns
FakeCanonicalTransactionChain.getTotalElements.returns(1000000000) // just needs to be large
FakeBondManager.isCollateralized.returns(true)
})
describe('findEventForStateBatch', () => {
describe('when the event exists once', () => {
beforeEach(async () => {
await StateCommitmentChain.appendStateBatch(
[hre.ethers.constants.HashZero],
0
)
})
it('should return the event', async () => {
const event = await findEventForStateBatch(StateCommitmentChain, 0)
expect(event.args._batchIndex).to.equal(0)
})
})
describe('when the event does not exist', () => {
it('should throw an error', async () => {
await expect(
findEventForStateBatch(StateCommitmentChain, 0)
).to.eventually.be.rejectedWith('unable to find event for batch')
})
})
describe('when more than one event exists', () => {
beforeEach(async () => {
await StateCommitmentChain.appendStateBatch(
[hre.ethers.constants.HashZero],
0
)
await hre.ethers.provider.send('hardhat_setStorageAt', [
ChainStorageContainer.address,
'0x2',
hre.ethers.constants.HashZero,
])
await StateCommitmentChain.appendStateBatch(
[hre.ethers.constants.HashZero],
0
)
})
it('should throw an error', async () => {
await expect(
findEventForStateBatch(StateCommitmentChain, 0)
).to.eventually.be.rejectedWith('found too many events for batch')
})
})
})
describe('findFirstUnfinalizedIndex', () => {
describe('when the chain is more then FPW seconds old', () => {
beforeEach(async () => {
await StateCommitmentChain.appendStateBatch(
[hre.ethers.constants.HashZero],
0
)
// Simulate FPW passing
await hre.ethers.provider.send('evm_increaseTime', [
toRpcHexString(challengeWindowSeconds * 2),
])
await StateCommitmentChain.appendStateBatch(
[hre.ethers.constants.HashZero],
1
)
await StateCommitmentChain.appendStateBatch(
[hre.ethers.constants.HashZero],
2
)
})
it('should find the first batch older than the FPW', async () => {
const first = await findFirstUnfinalizedStateBatchIndex(
StateCommitmentChain
)
expect(first).to.equal(1)
})
})
describe('when the chain is less than FPW seconds old', () => {
beforeEach(async () => {
await StateCommitmentChain.appendStateBatch(
[hre.ethers.constants.HashZero],
0
)
await StateCommitmentChain.appendStateBatch(
[hre.ethers.constants.HashZero],
1
)
await StateCommitmentChain.appendStateBatch(
[hre.ethers.constants.HashZero],
2
)
})
it('should return zero', async () => {
const first = await findFirstUnfinalizedStateBatchIndex(
StateCommitmentChain
)
expect(first).to.equal(0)
})
})
describe('when no batches submitted for the entire FPW', () => {
beforeEach(async () => {
await StateCommitmentChain.appendStateBatch(
[hre.ethers.constants.HashZero],
0
)
await StateCommitmentChain.appendStateBatch(
[hre.ethers.constants.HashZero],
1
)
await StateCommitmentChain.appendStateBatch(
[hre.ethers.constants.HashZero],
2
)
// Simulate FPW passing and no new batches
await hre.ethers.provider.send('evm_increaseTime', [
toRpcHexString(challengeWindowSeconds * 2),
])
// Mine a block to force timestamp to update
await hre.ethers.provider.send('hardhat_mine', ['0x1'])
})
it('should return undefined', async () => {
const first = await findFirstUnfinalizedStateBatchIndex(
StateCommitmentChain
)
expect(first).to.equal(undefined)
})
})
})
})