integration-tests: fee tests

Add test coverage for new fee scheme
and refactor old tests to work with new scheme

.changeset/mighty-jars-rest.md

@@ -0,0 +1,5 @@
+---
+'@eth-optimism/integration-tests': patch
+---
+
+Add updated fee scheme integration tests

integration-tests/package.json

@@ -9,8 +9,7 @@
     "lint": "yarn lint:fix && yarn lint:check",
     "lint:fix": "yarn lint:check --fix",
     "lint:check": "eslint .",
-    "build:integration": "yarn build:contracts",
-    "build:contracts": "hardhat compile",
+    "build": "hardhat compile",
     "test:integration": "hardhat --network optimism test",
     "test:integration:live": "IS_LIVE_NETWORK=true hardhat --network optimism test",
     "test:sync": "hardhat --network optimism test sync-tests/*.spec.ts --no-compile",
@@ -21,6 +20,7 @@
     "@eth-optimism/core-utils": "^0.6.0",
     "@eth-optimism/message-relayer": "^0.1.13",
     "@ethersproject/providers": "^5.4.4",
+    "@ethersproject/transactions": "^5.4.0",
     "@nomiclabs/hardhat-ethers": "^2.0.2",
     "@nomiclabs/hardhat-waffle": "^2.0.1",
     "@types/chai": "^4.2.17",
@@ -30,19 +30,19 @@
     "@types/shelljs": "^0.8.8",
     "@typescript-eslint/eslint-plugin": "^4.26.0",
     "@typescript-eslint/parser": "^4.26.0",
+    "babel-eslint": "^10.1.0",
     "chai": "^4.3.3",
     "chai-as-promised": "^7.1.1",
     "docker-compose": "^0.23.8",
     "dotenv": "^10.0.0",
     "envalid": "^7.1.0",
-    "babel-eslint": "^10.1.0",
     "eslint": "^7.27.0",
-    "eslint-plugin-prettier": "^3.4.0",
     "eslint-config-prettier": "^8.3.0",
     "eslint-plugin-ban": "^1.5.2",
     "eslint-plugin-import": "^2.23.4",
     "eslint-plugin-jsdoc": "^35.1.2",
     "eslint-plugin-prefer-arrow": "^1.2.3",
+    "eslint-plugin-prettier": "^3.4.0",
     "eslint-plugin-react": "^7.24.0",
     "eslint-plugin-unicorn": "^32.0.1",
     "ethereum-waffle": "^3.3.0",

integration-tests/test/fee-payment.spec.ts

@@ -4,37 +4,157 @@ chai.use(chaiAsPromised)
 
 /* Imports: External */
 import { ethers, BigNumber, Contract, utils } from 'ethers'
-import { TxGasLimit, TxGasPrice } from '@eth-optimism/core-utils'
-import { predeploys, getContractInterface } from '@eth-optimism/contracts'
+import { sleep } from '@eth-optimism/core-utils'
+import { serialize } from '@ethersproject/transactions'
+import {
+  predeploys,
+  getContractInterface,
+  getContractFactory,
+} from '@eth-optimism/contracts'
 
 /* Imports: Internal */
 import { IS_LIVE_NETWORK } from './shared/utils'
 import { OptimismEnv } from './shared/env'
 import { Direction } from './shared/watcher-utils'
 
+const setPrices = async (env: OptimismEnv, value: number | BigNumber) => {
+  const gasPrice = await env.gasPriceOracle.setGasPrice(value)
+  await gasPrice.wait()
+  const baseFee = await env.gasPriceOracle.setL1BaseFee(value)
+  await baseFee.wait()
+}
+
 describe('Fee Payment Integration Tests', async () => {
   let env: OptimismEnv
+  const other = '0x1234123412341234123412341234123412341234'
+
   before(async () => {
     env = await OptimismEnv.new()
   })
 
-  let ovmSequencerFeeVault: Contract
-  before(async () => {
-    ovmSequencerFeeVault = new Contract(
-      predeploys.OVM_SequencerFeeVault,
-      getContractInterface('OVM_SequencerFeeVault'),
-      env.l2Wallet
+  it(`should return eth_gasPrice equal to OVM_GasPriceOracle.gasPrice`, async () => {
+    const assertGasPrice = async () => {
+      const gasPrice = await env.l2Wallet.getGasPrice()
+      const oracleGasPrice = await env.gasPriceOracle.gasPrice()
+      expect(gasPrice).to.deep.equal(oracleGasPrice)
+    }
+
+    assertGasPrice()
+    // update the gas price
+    const tx = await env.gasPriceOracle.setGasPrice(1000)
+    await tx.wait()
+
+    assertGasPrice()
+  })
+
+  it('Paying a nonzero but acceptable gasPrice fee', async () => {
+    await setPrices(env, 1000)
+
+    const amount = utils.parseEther('0.0000001')
+    const balanceBefore = await env.l2Wallet.getBalance()
+    const feeVaultBalanceBefore = await env.l2Wallet.provider.getBalance(
+      env.sequencerFeeVault.address
+    )
+    expect(balanceBefore.gt(amount))
+
+    const unsigned = await env.l2Wallet.populateTransaction({
+      to: other,
+      value: amount,
+      gasLimit: 500000,
+    })
+
+    const raw = serialize({
+      nonce: parseInt(unsigned.nonce.toString(10), 10),
+      value: unsigned.value,
+      gasPrice: unsigned.gasPrice,
+      gasLimit: unsigned.gasLimit,
+      to: unsigned.to,
+      data: unsigned.data,
+    })
+
+    const l1Fee = await env.gasPriceOracle.getL1Fee(raw)
+
+    const tx = await env.l2Wallet.sendTransaction(unsigned)
+    const receipt = await tx.wait()
+    expect(receipt.status).to.eq(1)
+
+    const balanceAfter = await env.l2Wallet.getBalance()
+    const feeVaultBalanceAfter = await env.l2Wallet.provider.getBalance(
+      env.sequencerFeeVault.address
+    )
+
+    const l2Fee = receipt.gasUsed.mul(tx.gasPrice)
+
+    const expectedFeePaid = l1Fee.add(l2Fee)
+
+    expect(balanceBefore.sub(balanceAfter)).to.deep.equal(
+      expectedFeePaid.add(amount)
+    )
+
+    // Make sure the fee was transferred to the vault.
+    expect(feeVaultBalanceAfter.sub(feeVaultBalanceBefore)).to.deep.equal(
+      expectedFeePaid
+    )
+
+    await setPrices(env, 1)
+  })
+
+  it('should compute correct fee', async () => {
+    await setPrices(env, 1000)
+
+    const preBalance = await env.l2Wallet.getBalance()
+
+    const OVM_GasPriceOracle = getContractFactory('OVM_GasPriceOracle')
+      .attach(predeploys.OVM_GasPriceOracle)
+      .connect(env.l2Wallet)
+
+    const WETH = getContractFactory('OVM_ETH')
+      .attach(predeploys.OVM_ETH)
+      .connect(env.l2Wallet)
+
+    const feeVaultBefore = await WETH.balanceOf(
+      predeploys.OVM_SequencerFeeVault
     )
+
+    const unsigned = await env.l2Wallet.populateTransaction({
+      to: env.l2Wallet.address,
+      value: 0,
+    })
+
+    const raw = serialize({
+      nonce: parseInt(unsigned.nonce.toString(10), 10),
+      value: unsigned.value,
+      gasPrice: unsigned.gasPrice,
+      gasLimit: unsigned.gasLimit,
+      to: unsigned.to,
+      data: unsigned.data,
+    })
+
+    const l1Fee = await OVM_GasPriceOracle.getL1Fee(raw)
+
+    const tx = await env.l2Wallet.sendTransaction(unsigned)
+    const receipt = await tx.wait()
+    const l2Fee = receipt.gasUsed.mul(tx.gasPrice)
+    const postBalance = await env.l2Wallet.getBalance()
+    const feeVaultAfter = await WETH.balanceOf(predeploys.OVM_SequencerFeeVault)
+    const fee = l1Fee.add(l2Fee)
+    const balanceDiff = preBalance.sub(postBalance)
+    const feeReceived = feeVaultAfter.sub(feeVaultBefore)
+    expect(balanceDiff).to.deep.equal(fee)
+    // There is no inflation
+    expect(feeReceived).to.deep.equal(balanceDiff)
+
+    await setPrices(env, 1)
   })
 
   it('should not be able to withdraw fees before the minimum is met', async () => {
-    await expect(ovmSequencerFeeVault.withdraw()).to.be.rejected
+    await expect(env.sequencerFeeVault.withdraw()).to.be.rejected
   })
 
   it('should be able to withdraw fees back to L1 once the minimum is met', async function () {
-    const l1FeeWallet = await ovmSequencerFeeVault.l1FeeWallet()
+    const l1FeeWallet = await env.sequencerFeeVault.l1FeeWallet()
     const balanceBefore = await env.l1Wallet.provider.getBalance(l1FeeWallet)
-    const withdrawalAmount = await ovmSequencerFeeVault.MIN_WITHDRAWAL_AMOUNT()
+    const withdrawalAmount = await env.sequencerFeeVault.MIN_WITHDRAWAL_AMOUNT()
 
     const l2WalletBalance = await env.l2Wallet.getBalance()
     if (IS_LIVE_NETWORK && l2WalletBalance.lt(withdrawalAmount)) {
@@ -48,18 +168,18 @@ describe('Fee Payment Integration Tests', async () => {
 
     // Transfer the minimum required to withdraw.
     const tx = await env.l2Wallet.sendTransaction({
-      to: ovmSequencerFeeVault.address,
+      to: env.sequencerFeeVault.address,
       value: withdrawalAmount,
       gasLimit: 500000,
     })
     await tx.wait()
 
     const vaultBalance = await env.ovmEth.balanceOf(
-      ovmSequencerFeeVault.address
+      env.sequencerFeeVault.address
     )
 
     // Submit the withdrawal.
-    const withdrawTx = await ovmSequencerFeeVault.withdraw({
+    const withdrawTx = await env.sequencerFeeVault.withdraw({
       gasPrice: 0, // Need a gasprice of 0 or the balances will include the fee paid during this tx.
     })
 

integration-tests/test/native-eth.spec.ts

@@ -2,6 +2,7 @@ import { expect } from 'chai'
 
 /* Imports: External */
 import { Wallet, utils, BigNumber } from 'ethers'
+import { serialize } from '@ethersproject/transactions'
 import { predeploys } from '@eth-optimism/contracts'
 
 /* Imports: Internal */
@@ -248,24 +249,44 @@ describe('Native ETH Integration Tests', async () => {
       DEFAULT_TEST_GAS_L2,
       '0xFFFF'
     )
+
     await transaction.wait()
     await env.relayXDomainMessages(transaction)
     const receipts = await env.waitForXDomainTransaction(
       transaction,
       Direction.L2ToL1
     )
-    const fee = receipts.tx.gasLimit.mul(receipts.tx.gasPrice)
+
+    const l2Fee = receipts.tx.gasPrice.mul(receipts.receipt.gasUsed)
+
+    // Calculate the L1 portion of the fee
+    const raw = serialize({
+      nonce: transaction.nonce,
+      value: transaction.value,
+      gasPrice: transaction.gasPrice,
+      gasLimit: transaction.gasLimit,
+      to: transaction.to,
+      data: transaction.data,
+    })
+
+    const l1Fee = await env.gasPriceOracle.getL1Fee(raw)
+    const fee = l2Fee.add(l1Fee)
 
     const postBalances = await getBalances(env)
 
     expect(postBalances.l1BridgeBalance).to.deep.eq(
-      preBalances.l1BridgeBalance.sub(withdrawAmount)
+      preBalances.l1BridgeBalance.sub(withdrawAmount),
+      'L1 Bridge Balance Mismatch'
     )
+
     expect(postBalances.l2UserBalance).to.deep.eq(
-      preBalances.l2UserBalance.sub(withdrawAmount.add(fee))
+      preBalances.l2UserBalance.sub(withdrawAmount.add(fee)),
+      'L2 User Balance Mismatch'
     )
+
     expect(postBalances.l1BobBalance).to.deep.eq(
-      preBalances.l1BobBalance.add(withdrawAmount)
+      preBalances.l1BobBalance.add(withdrawAmount),
+      'L1 User Balance Mismatch'
     )
   })
 
@@ -282,7 +303,7 @@ describe('Native ETH Integration Tests', async () => {
       Direction.L1ToL2
     )
 
-    // 2. trnsfer to another address
+    // 2. transfer to another address
     const other = Wallet.createRandom().connect(env.l2Wallet.provider)
     const tx = await env.l2Wallet.sendTransaction({
       to: other.address,
@@ -311,8 +332,22 @@ describe('Native ETH Integration Tests', async () => {
       Direction.L2ToL1
     )
 
+    // Compute the L1 portion of the fee
+    const l1Fee = await env.gasPriceOracle.getL1Fee(
+      serialize({
+        nonce: transaction.nonce,
+        value: transaction.value,
+        gasPrice: transaction.gasPrice,
+        gasLimit: transaction.gasLimit,
+        to: transaction.to,
+        data: transaction.data,
+      })
+    )
+
     // check that correct amount was withdrawn and that fee was charged
-    const fee = receipts.tx.gasLimit.mul(receipts.tx.gasPrice)
+    const l2Fee = receipts.tx.gasPrice.mul(receipts.receipt.gasUsed)
+
+    const fee = l1Fee.add(l2Fee)
     const l1BalanceAfter = await other
       .connect(env.l1Wallet.provider)
       .getBalance()

integration-tests/test/rpc.spec.ts

@@ -1,8 +1,4 @@
-import {
-  injectL2Context,
-  TxGasLimit,
-  TxGasPrice,
-} from '@eth-optimism/core-utils'
+import { injectL2Context } from '@eth-optimism/core-utils'
 import { Wallet, BigNumber, Contract, ContractFactory } from 'ethers'
 import { ethers } from 'hardhat'
 import chai, { expect } from 'chai'