test: fee payments (#40)

* fix: use the proxy gateway from the addresses

* test: add fee payment test

* chore: explicitly declare solc version in hardhat config

integration-tests/hardhat.config.ts

@@ -14,6 +14,10 @@ const config: HardhatUserConfig = {
       ovm: true,
     },
   },
+  solidity: '0.7.6',
+  ovm: {
+    solcVersion: '0.7.6',
+  },
 }
 
 export default config

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

@@ -0,0 +1,55 @@
+import chai, { expect } from 'chai'
+import chaiAsPromised from 'chai-as-promised'
+chai.use(chaiAsPromised)
+import { BigNumber, Contract, utils } from 'ethers'
+
+import {
+  l1Provider,
+  l2Provider,
+  l1Wallet,
+  l2Wallet,
+  getGateway,
+  getAddressManager,
+  getOvmEth,
+  fundUser,
+} from './shared/utils'
+import { initWatcher } from './shared/watcher-utils'
+
+describe('Fee Payment Integration Tests', async () => {
+  let OVM_L1ETHGateway: Contract
+  let OVM_ETH: Contract
+  let AddressManager: Contract
+  const other = '0x1234123412341234123412341234123412341234'
+  const amount = utils.parseEther('1')
+
+  before(async () => {
+    AddressManager = getAddressManager(l1Wallet)
+    OVM_L1ETHGateway = await getGateway(l1Wallet, AddressManager)
+    OVM_ETH = getOvmEth(l2Wallet)
+    const watcher = await initWatcher(l1Provider, l2Provider, AddressManager)
+    await fundUser(watcher, OVM_L1ETHGateway, amount)
+  })
+
+  it('Paying a nonzero but acceptable gasPrice fee', async () => {
+    // manually set the gas price because otherwise it's returned as 0
+    const gasPrice = BigNumber.from(1_000_000)
+    const amt = amount.div(2)
+
+    const balanceBefore = await l2Wallet.getBalance()
+    const tx = await OVM_ETH.transfer(other, amt, { gasPrice })
+    await tx.wait()
+    const balanceAfter = await l2Wallet.getBalance()
+    expect(balanceBefore.sub(balanceAfter)).to.be.deep.eq(
+      gasPrice.mul(tx.gasLimit).add(amt)
+    )
+  })
+
+  it('sequencer rejects transaction with a non-multiple-of-1M gasPrice', async () => {
+    const gasPrice = BigNumber.from(1_000_000 - 1)
+    await expect(
+      OVM_ETH.transfer(other, 0, { gasPrice })
+    ).to.be.eventually.rejectedWith(
+      'Gas price must be a multiple of 1,000,000 wei'
+    )
+  })
+})

integration-tests/test/shared/utils.ts

@@ -1,3 +1,95 @@
-export function sleep(ms: number) {
-  return new Promise((resolve) => setTimeout(resolve, ms))
+import {
+  getContractFactory,
+  getContractInterface,
+} from '@eth-optimism/contracts'
+import { Watcher } from '@eth-optimism/core-utils'
+import {
+  Contract,
+  Wallet,
+  constants,
+  providers,
+  BigNumberish,
+  BigNumber,
+} from 'ethers'
+import { Direction, waitForXDomainTransaction } from './watcher-utils'
+
+// The hardhat instance
+const l1HttpPort = 9545
+export const l1Provider = new providers.JsonRpcProvider(
+  `http://localhost:${l1HttpPort}`
+)
+
+const httpPort = 8545
+export const l2Provider = new providers.JsonRpcProvider(
+  `http://localhost:${httpPort}`
+)
+
+// The sequencer private key which is funded on L1
+export const l1Wallet = new Wallet(
+  '0xac0974bec39a17e36ba4a6b4d238ff944bacb478cbed5efcae784d7bf4f2ff80',
+  l1Provider
+)
+
+// A random private key which should always be funded with deposits from L1 -> L2
+// if it's using non-0 gas price
+export const l2Wallet = l1Wallet.connect(l2Provider)
+
+// Predeploys
+export const PROXY_SEQUENCER_ENTRYPOINT_ADDRESS =
+  '0x4200000000000000000000000000000000000004'
+export const OVM_ETH_ADDRESS = '0x4200000000000000000000000000000000000006'
+
+// The address manager is always at the same address in testnet deployments
+export const addressManagerAddress =
+  '0x5FbDB2315678afecb367f032d93F642f64180aa3'
+
+export const getAddressManager = (provider: any) => {
+  return getContractFactory('Lib_AddressManager')
+    .connect(provider)
+    .attach(addressManagerAddress)
 }
+
+// Gets the gateway using the proxy if available
+export const getGateway = async (wallet: Wallet, AddressManager: Contract) => {
+  const l1GatewayInterface = getContractInterface('OVM_L1ETHGateway')
+  const ProxyGatewayAddress = await AddressManager.getAddress(
+    'Proxy__OVM_L1ETHGateway'
+  )
+  const addressToUse =
+    ProxyGatewayAddress !== constants.AddressZero
+      ? ProxyGatewayAddress
+      : await AddressManager.getAddress('OVM_L1ETHGateway')
+
+  const OVM_L1ETHGateway = new Contract(
+    addressToUse,
+    l1GatewayInterface,
+    wallet
+  )
+
+  return OVM_L1ETHGateway
+}
+
+export const getOvmEth = (wallet: Wallet) => {
+  const OVM_ETH = new Contract(
+    OVM_ETH_ADDRESS,
+    getContractInterface('OVM_ETH'),
+    wallet
+  )
+
+  return OVM_ETH
+}
+
+export const fundUser = async (
+  watcher: Watcher,
+  gateway: Contract,
+  amount: BigNumberish,
+  recipient?: string
+) => {
+  const value = BigNumber.from(amount)
+  const tx = recipient
+    ? gateway.depositTo(recipient, { value })
+    : gateway.deposit({ value })
+  await waitForXDomainTransaction(watcher, tx, Direction.L1ToL2)
+}
+
+export const sleep = (ms: number) => new Promise((r) => setTimeout(r, ms))

ops/scripts/geth.sh

@@ -11,7 +11,12 @@ function envSet() {
 # set all the necessary env vars
 envSet ETH1_ADDRESS_RESOLVER_ADDRESS  AddressManager
 envSet ETH1_L1_CROSS_DOMAIN_MESSENGER_ADDRESS Proxy__OVM_L1CrossDomainMessenger
-envSet ETH1_L1_ETH_GATEWAY_ADDRESS OVM_L1ETHGateway
 envSet ROLLUP_ADDRESS_MANAGER_OWNER_ADDRESS Deployer
 
+# set the address to the proxy gateway if possible
+envSet ETH1_L1_ETH_GATEWAY_ADDRESS Proxy__OVM_L1ETHGateway
+if [ $ETH1_L1_ETH_GATEWAY_ADDRESS == null ]; then
+    envSet ETH1_L1_ETH_GATEWAY_ADDRESS OVM_L1ETHGateway
+fi
+
 geth --verbosity=6