dev: Apply linting to all test files (#275)

* Apply linting to all test files

* Lint new stuff from master

* Minor tweak to avoid a bug

packages/contracts/src/contract-deployment/deploy.ts

 /* External Imports */
-import { Signer, Contract, ContractFactory } from 'ethers'
+import { Contract } from 'ethers'
 
 /* Internal Imports */
 import { RollupDeployConfig, makeContractDeployConfig } from './config'

packages/contracts/test/bond.ts

@@ -9,7 +9,7 @@ async function mineBlock(provider: any, timestamp: number): Promise<void> {
 
 describe('BondManager', () => {
   const provider = waffle.provider
-  let wallets = provider.getWallets()
+  const wallets = provider.getWallets()
 
   let bondManager: Contract
   let token: Contract
@@ -117,7 +117,7 @@ describe('BondManager', () => {
       const timestamp = withdrawalTimestamp + ONE_WEEK
       await mineBlock(deployer.provider, timestamp)
 
-      const balanceBefore = await token.balanceOf(sender)
+      balanceBefore = await token.balanceOf(sender)
       await bondManager.finalizeWithdrawal()
       const bond = await bondManager.bonds(sender)
       expect(bond.state).to.eq(State.NOT_COLLATERALIZED)
@@ -333,12 +333,12 @@ describe('BondManager', () => {
 
       describe('same publisher commits fraud multiple times', async () => {
         let timestamp: number
-        let root1 =
+        const root1 =
           '0x0000000000000000000000000000000000000000000000000000000000000000'
-        let ts1 = 100
-        let root2 =
+        const ts1 = 100
+        const root2 =
           '0x0000000000000000000000000000000000000000000000000000000000000001'
-        let ts2 = 110
+        const ts2 = 110
 
         beforeEach(async () => {
           await fraudVerifier.finalize(root2, sender, ts2)

packages/contracts/test/contracts/OVM/accounts/OVM_ECDSAContractAccount.spec.ts

@@ -4,16 +4,16 @@ import { expect } from '../../../setup'
 import { ethers, waffle } from 'hardhat'
 import { ContractFactory, Contract, Wallet } from 'ethers'
 import { MockContract, smockit } from '@eth-optimism/smock'
-import { NON_ZERO_ADDRESS, ZERO_ADDRESS } from '../../../helpers/constants'
+
+/* Internal Imports */
+import { NON_ZERO_ADDRESS } from '../../../helpers/constants'
 import {
   serializeNativeTransaction,
   signNativeTransaction,
   DEFAULT_EIP155_TX,
   serializeEthSignTransaction,
   signEthSignMessage,
-  EIP155Transaction,
 } from '../../../helpers'
-import { defaultAbiCoder } from 'ethers/lib/utils'
 
 const callPrecompile = async (
   Helper_PrecompileCaller: Contract,

packages/contracts/test/contracts/OVM/accounts/OVM_ProxyEOA.spec.ts

@@ -4,15 +4,9 @@ import { expect } from '../../../setup'
 import { ethers, waffle } from 'hardhat'
 import { ContractFactory, Contract, Wallet } from 'ethers'
 import { MockContract, smockit } from '@eth-optimism/smock'
-import { NON_ZERO_ADDRESS } from '../../../helpers/constants'
-import { AbiCoder, keccak256 } from 'ethers/lib/utils'
-import {
-  DEFAULT_EIP155_TX,
-  remove0x,
-  serializeNativeTransaction,
-  signNativeTransaction,
-} from '../../../helpers'
-import { getContractInterface } from '../../../../src'
+
+/* Internal Imports */
+import { remove0x } from '../../../helpers'
 
 const callPrecompile = async (
   Helper_PrecompileCaller: Contract,

packages/contracts/test/contracts/OVM/bridge/assets/OVM_L1ERC20Gateway.spec.ts

@@ -2,13 +2,8 @@ import { expect } from '../../../../setup'
 
 /* External Imports */
 import { ethers } from 'hardhat'
-import { Signer, ContractFactory, Contract, BigNumber } from 'ethers'
-import {
-  smockit,
-  MockContract,
-  smoddit,
-  ModifiableContract,
-} from '@eth-optimism/smock'
+import { Signer, ContractFactory, Contract } from 'ethers'
+import { smockit, MockContract, smoddit } from '@eth-optimism/smock'
 
 /* Internal Imports */
 import { NON_ZERO_ADDRESS, ZERO_ADDRESS } from '../../../../helpers'
@@ -28,7 +23,6 @@ describe('OVM_L1ERC20Gateway', () => {
   let Mock__OVM_L2DepositedERC20: MockContract
   let Factory__L1ERC20: ContractFactory
   let L1ERC20: Contract
-  const initialSupply = 1_000
   before(async () => {
     ;[alice, bob] = await ethers.getSigners()
 
@@ -145,7 +139,6 @@ describe('OVM_L1ERC20Gateway', () => {
     const INITIAL_DEPOSITER_BALANCE = 100_000
     let depositer: string
     const depositAmount = 1_000
-    let L1ERC20: Contract
 
     beforeEach(async () => {
       // Deploy the L1 ERC20 token, Alice will receive the full initialSupply

packages/contracts/test/contracts/OVM/bridge/assets/OVM_L1ETHGateway.spec.ts

@@ -2,13 +2,8 @@ import { expect } from '../../../../setup'
 
 /* External Imports */
 import { ethers } from 'hardhat'
-import { Signer, ContractFactory, Contract, BigNumber, providers } from 'ethers'
-import {
-  smockit,
-  MockContract,
-  smoddit,
-  ModifiableContract,
-} from '@eth-optimism/smock'
+import { Signer, Contract } from 'ethers'
+import { smockit, MockContract } from '@eth-optimism/smock'
 
 /* Internal Imports */
 import {

packages/contracts/test/contracts/OVM/bridge/assets/OVM_L2DepositedERC20.spec.ts

@@ -2,7 +2,7 @@ import { expect } from '../../../../setup'
 
 /* External Imports */
 import { ethers } from 'hardhat'
-import { Signer, ContractFactory, Contract, BigNumber } from 'ethers'
+import { Signer, ContractFactory, Contract } from 'ethers'
 import {
   smockit,
   MockContract,
@@ -13,8 +13,6 @@ import {
 /* Internal Imports */
 import { NON_ZERO_ADDRESS, ZERO_ADDRESS } from '../../../../helpers'
 
-const decimals = 1
-
 const ERR_INVALID_MESSENGER = 'OVM_XCHAIN: messenger contract unauthenticated'
 const ERR_INVALID_X_DOMAIN_MSG_SENDER =
   'OVM_XCHAIN: wrong sender of cross-domain message'
@@ -50,11 +48,7 @@ describe('OVM_L2DepositedERC20', () => {
     // Deploy the contract under test
     OVM_L2DepositedERC20 = await (
       await ethers.getContractFactory('OVM_L2DepositedERC20')
-    ).deploy(
-      Mock__OVM_L2CrossDomainMessenger.address,
-      'ovmWETH',
-      'oWETH'
-    )
+    ).deploy(Mock__OVM_L2CrossDomainMessenger.address, 'ovmWETH', 'oWETH')
 
     // initialize the L2 Gateway with the L1G ateway addrss
     await OVM_L2DepositedERC20.init(MOCK_L1GATEWAY_ADDRESS)
@@ -116,11 +110,7 @@ describe('OVM_L2DepositedERC20', () => {
       // Deploy a smodded gateway so we can give some balances to withdraw
       SmoddedL2Gateway = await (
         await smoddit('OVM_L2DepositedERC20', alice)
-      ).deploy(
-        Mock__OVM_L2CrossDomainMessenger.address,
-        'ovmWETH',
-        'oWETH'
-      )
+      ).deploy(Mock__OVM_L2CrossDomainMessenger.address, 'ovmWETH', 'oWETH')
       await SmoddedL2Gateway.init(MOCK_L1GATEWAY_ADDRESS)
 
       // Populate the initial state with a total supply and some money in alice's balance

packages/contracts/test/contracts/OVM/bridge/base/OVM_L1CrossDomainMessenger.spec.ts

@@ -10,7 +10,6 @@ import {
   makeAddressManager,
   setProxyTarget,
   NON_NULL_BYTES32,
-  ZERO_ADDRESS,
   NON_ZERO_ADDRESS,
   NULL_BYTES32,
   DUMMY_BATCH_HEADERS,
@@ -232,7 +231,7 @@ describe('OVM_L1CrossDomainMessenger', () => {
         true
       )
 
-      const proof = {
+      const proof1 = {
         stateRoot: NULL_BYTES32,
         stateRootBatchHeader: DUMMY_BATCH_HEADERS[0],
         stateRootProof: DUMMY_BATCH_PROOFS[0],
@@ -246,7 +245,7 @@ describe('OVM_L1CrossDomainMessenger', () => {
           sender,
           message,
           0,
-          proof
+          proof1
         )
       ).to.be.revertedWith('Provided message could not be verified.')
     })
@@ -256,7 +255,7 @@ describe('OVM_L1CrossDomainMessenger', () => {
         false
       )
 
-      const proof = {
+      const proof1 = {
         stateRoot: NULL_BYTES32,
         stateRootBatchHeader: DUMMY_BATCH_HEADERS[0],
         stateRootProof: DUMMY_BATCH_PROOFS[0],
@@ -270,7 +269,7 @@ describe('OVM_L1CrossDomainMessenger', () => {
           sender,
           message,
           0,
-          proof
+          proof1
         )
       ).to.be.revertedWith('Provided message could not be verified.')
     })

packages/contracts/test/contracts/OVM/bridge/base/OVM_L1MultiMessageRelayer.ts

@@ -14,7 +14,6 @@ import {
   DUMMY_BATCH_PROOFS,
   toHexString,
 } from '../../../../helpers'
-import { sign } from 'crypto'
 
 describe('OVM_L1MultiMessageRelayer', () => {
   let signer: Signer
@@ -54,7 +53,7 @@ describe('OVM_L1MultiMessageRelayer', () => {
     )
 
     // define a dummy proof to satisfy the abi
-    let dummyProof = {
+    const dummyProof = {
       stateRoot: NON_NULL_BYTES32,
       stateRootBatchHeader: DUMMY_BATCH_HEADERS[0],
       stateRootProof: DUMMY_BATCH_PROOFS[0],
@@ -63,27 +62,30 @@ describe('OVM_L1MultiMessageRelayer', () => {
     }
 
     // create a few dummy messages to relay
-    let m1 = {
+    const m1 = {
       target: '0x1100000000000000000000000000000000000000',
       message: NON_NULL_BYTES32,
       sender: '0x2200000000000000000000000000000000000000',
       messageNonce: 1,
       proof: dummyProof,
     }
-    let m2 = {
+
+    const m2 = {
       target: '0x1100000000000000000000000000000000000000',
       message: NON_NULL_BYTES32,
       sender: '0x2200000000000000000000000000000000000000',
       messageNonce: 2,
       proof: dummyProof,
     }
-    let m3 = {
+
+    const m3 = {
       target: '0x1100000000000000000000000000000000000000',
       message: NON_NULL_BYTES32,
       sender: '0x2200000000000000000000000000000000000000',
       messageNonce: 2,
       proof: dummyProof,
     }
+
     messages = [m1, m2, m3]
   })
 

packages/contracts/test/contracts/OVM/chain/OVM_CanonicalTransactionChain.spec.ts

@@ -2,7 +2,7 @@ import { expect } from '../../../setup'
 
 /* External Imports */
 import { ethers } from 'hardhat'
-import { Signer, ContractFactory, Contract, BigNumber, providers } from 'ethers'
+import { Signer, ContractFactory, Contract, BigNumber } from 'ethers'
 import { TransactionResponse } from '@ethersproject/abstract-provider'
 import { smockit, MockContract } from '@eth-optimism/smock'
 import _ from 'lodash'
@@ -245,7 +245,6 @@ describe('OVM_CanonicalTransactionChain', () => {
   describe('enqueue', () => {
     const target = NON_ZERO_ADDRESS
     const gasLimit = 500_000
-    const data = '0x' + '12'.repeat(1234)
 
     it('should revert when trying to input more data than the max data size', async () => {
       const MAX_ROLLUP_TX_SIZE = await OVM_CanonicalTransactionChain.MAX_ROLLUP_TX_SIZE()
@@ -270,15 +269,17 @@ describe('OVM_CanonicalTransactionChain', () => {
 
     it('should revert if gas limit parameter is not at least MIN_ROLLUP_TX_GAS', async () => {
       const MIN_ROLLUP_TX_GAS = await OVM_CanonicalTransactionChain.MIN_ROLLUP_TX_GAS()
-      const gasLimit = MIN_ROLLUP_TX_GAS / 2
+      const customGasLimit = MIN_ROLLUP_TX_GAS / 2
+      const data = '0x' + '12'.repeat(1234)
 
       await expect(
-        OVM_CanonicalTransactionChain.enqueue(target, gasLimit, data)
+        OVM_CanonicalTransactionChain.enqueue(target, customGasLimit, data)
       ).to.be.revertedWith('Transaction gas limit too low to enqueue.')
     })
 
     it('should revert if transaction gas limit does not cover rollup burn', async () => {
       const L2_GAS_DISCOUNT_DIVISOR = await OVM_CanonicalTransactionChain.L2_GAS_DISCOUNT_DIVISOR()
+      const data = '0x' + '12'.repeat(1234)
 
       await expect(
         OVM_CanonicalTransactionChain.enqueue(target, gasLimit, data, {
@@ -290,6 +291,8 @@ describe('OVM_CanonicalTransactionChain', () => {
     describe('with valid input parameters', () => {
       it('should emit a TransactionEnqueued event', async () => {
         const timestamp = (await getEthTime(ethers.provider)) + 100
+        const data = '0x' + '12'.repeat(1234)
+
         await setEthTime(ethers.provider, timestamp)
 
         await expect(
@@ -298,6 +301,8 @@ describe('OVM_CanonicalTransactionChain', () => {
       })
 
       describe('when enqueing multiple times', () => {
+        const data = '0x' + '12'.repeat(1234)
+
         for (const size of ELEMENT_TEST_SIZES) {
           it(`should be able to enqueue ${size} elements`, async () => {
             for (let i = 0; i < size; i++) {
@@ -675,8 +680,8 @@ describe('OVM_CanonicalTransactionChain', () => {
             {
               numSequencedTransactions: 1,
               numSubsequentQueueTransactions: 0,
-              timestamp: timestamp,
-              blockNumber: blockNumber,
+              timestamp,
+              blockNumber,
             },
           ],
           transactions: [data],
@@ -1005,7 +1010,7 @@ describe('OVM_CanonicalTransactionChain', () => {
                     {
                       numSequencedTransactions: 1,
                       numSubsequentQueueTransactions: 0,
-                      timestamp: timestamp,
+                      timestamp,
                       blockNumber,
                     },
                   ],
@@ -1029,8 +1034,8 @@ describe('OVM_CanonicalTransactionChain', () => {
                     {
                       numSequencedTransactions: 1,
                       numSubsequentQueueTransactions: 0,
-                      timestamp: timestamp,
-                      blockNumber: blockNumber,
+                      timestamp,
+                      blockNumber,
                     },
                   ],
                   shouldStartAtElement: 0,
@@ -1043,8 +1048,8 @@ describe('OVM_CanonicalTransactionChain', () => {
           })
           describe('adding multiple sequencer transactions with multiple pending queue elements', () => {
             const numQueuedTransactions = 10
-            let queueElements = []
-            let validContexts = []
+            const queueElements = []
+            const validContexts = []
             beforeEach(async () => {
               for (let i = 0; i < numQueuedTransactions; i++) {
                 await OVM_CanonicalTransactionChain.enqueue(
@@ -1075,7 +1080,7 @@ describe('OVM_CanonicalTransactionChain', () => {
             })
 
             it('reverts if wrong timestamp in middle', async () => {
-              let invalidTimestampContexts = [...validContexts]
+              const invalidTimestampContexts = [...validContexts]
               // put a bigger timestamp early
               invalidTimestampContexts[6].timestamp =
                 invalidTimestampContexts[8].timestamp
@@ -1093,7 +1098,7 @@ describe('OVM_CanonicalTransactionChain', () => {
             })
 
             it('reverts if wrong block number in the middle', async () => {
-              let invalidBlockNumberContexts = [...validContexts]
+              const invalidBlockNumberContexts = [...validContexts]
               // put a bigger block number early
               invalidBlockNumberContexts[6].blockNumber =
                 invalidBlockNumberContexts[8].blockNumber
@@ -1415,8 +1420,8 @@ describe('OVM_CanonicalTransactionChain', () => {
                 {
                   numSequencedTransactions: size,
                   numSubsequentQueueTransactions: 0,
-                  timestamp: timestamp,
-                  blockNumber: blockNumber,
+                  timestamp,
+                  blockNumber,
                 },
               ]
 
@@ -1466,7 +1471,7 @@ describe('OVM_CanonicalTransactionChain', () => {
                 return {
                   numSequencedTransactions: 1,
                   numSubsequentQueueTransactions: 1,
-                  timestamp: timestamp,
+                  timestamp,
                   blockNumber: Math.max(blockNumber, 0),
                 }
               })
@@ -1506,7 +1511,7 @@ describe('OVM_CanonicalTransactionChain', () => {
                 return {
                   numSequencedTransactions: size / spacing,
                   numSubsequentQueueTransactions: 1,
-                  timestamp: timestamp,
+                  timestamp,
                   blockNumber: Math.max(blockNumber, 0),
                 }
               })
@@ -1552,7 +1557,7 @@ describe('OVM_CanonicalTransactionChain', () => {
             {
               numSequencedTransactions: size,
               numSubsequentQueueTransactions: 0,
-              timestamp: timestamp,
+              timestamp,
               blockNumber: Math.max(blockNumber, 0),
             },
           ]

packages/contracts/test/contracts/OVM/chain/OVM_StateCommitmentChain.spec.ts

@@ -15,7 +15,6 @@ import {
   NULL_BYTES32,
   increaseEthTime,
 } from '../../../helpers'
-import { keccak256, defaultAbiCoder } from 'ethers/lib/utils'
 
 describe('OVM_StateCommitmentChain', () => {
   let sequencer: Signer
@@ -205,7 +204,7 @@ describe('OVM_StateCommitmentChain', () => {
         batch.length
       )
       await OVM_StateCommitmentChain.appendStateBatch(batch, 0)
-      batchHeader.extraData = defaultAbiCoder.encode(
+      batchHeader.extraData = ethers.utils.defaultAbiCoder.encode(
         ['uint256', 'address'],
         [await getEthTime(ethers.provider), await sequencer.getAddress()]
       )

packages/contracts/test/contracts/OVM/execution/OVM_ExecutionManager.gas-spec.ts

@@ -6,7 +6,6 @@ import { ethers } from 'hardhat'
 import { Contract, ContractFactory, Signer } from 'ethers'
 import { smockit, MockContract } from '@eth-optimism/smock'
 
-
 /* Internal Imports */
 import {
   makeAddressManager,
@@ -28,17 +27,17 @@ const DUMMY_GLOBALCONTEXT = {
 
 const QUEUE_ORIGIN = {
   SEQUENCER_QUEUE: 0,
-  L1TOL2_QUEUE: 1
+  L1TOL2_QUEUE: 1,
 }
 
-let DUMMY_TRANSACTION = {
+const DUMMY_TRANSACTION = {
   timestamp: 111111111111,
   blockNumber: 20,
   l1QueueOrigin: QUEUE_ORIGIN.SEQUENCER_QUEUE,
   l1TxOrigin: NON_ZERO_ADDRESS,
   entrypoint: NON_ZERO_ADDRESS, // update this below
   gasLimit: 10_000_000,
-  data: 0
+  data: 0,
 }
 
 describe('OVM_ExecutionManager gas consumption', () => {
@@ -56,26 +55,32 @@ describe('OVM_ExecutionManager gas consumption', () => {
     Factory__OVM_ExecutionManager = await ethers.getContractFactory(
       'OVM_ExecutionManager'
     )
-    
+
     // Deploy a simple contract that just returns successfully with no data
-    targetContractAddress = await deployContractCode('60206001f3', wallet, 10_000_000)
+    targetContractAddress = await deployContractCode(
+      '60206001f3',
+      wallet,
+      10_000_000
+    )
     DUMMY_TRANSACTION.entrypoint = targetContractAddress
 
     AddressManager = await makeAddressManager()
 
     // deploy the state manager and mock it for the state transitioner
     MOCK__STATE_MANAGER = await smockit(
-      await (
-        await ethers.getContractFactory('OVM_StateManager')
-      ).deploy(NON_ZERO_ADDRESS)
+      await (await ethers.getContractFactory('OVM_StateManager')).deploy(
+        NON_ZERO_ADDRESS
+      )
     )
-    
+
     // Setup the SM to satisfy all the checks executed during EM.run()
     MOCK__STATE_MANAGER.smocked.isAuthenticated.will.return.with(true)
-    MOCK__STATE_MANAGER.smocked.getAccountEthAddress.will.return.with(targetContractAddress)
+    MOCK__STATE_MANAGER.smocked.getAccountEthAddress.will.return.with(
+      targetContractAddress
+    )
     MOCK__STATE_MANAGER.smocked.hasAccount.will.return.with(true)
     MOCK__STATE_MANAGER.smocked.testAndSetAccountLoaded.will.return.with(true)
-    
+
     await AddressManager.setAddress(
       'OVM_StateManagerFactory',
       MOCK__STATE_MANAGER.address
@@ -85,7 +90,6 @@ describe('OVM_ExecutionManager gas consumption', () => {
     await gasMeasurement.init(wallet)
   })
 
-
   let OVM_ExecutionManager: Contract
   beforeEach(async () => {
     OVM_ExecutionManager = (
@@ -99,17 +103,18 @@ describe('OVM_ExecutionManager gas consumption', () => {
 
   describe('Measure cost of a very simple contract', async () => {
     it('Gas cost of run', async () => {
-      let gasCost = await gasMeasurement.getGasCost(
-        OVM_ExecutionManager, 'run', 
+      const gasCost = await gasMeasurement.getGasCost(
+        OVM_ExecutionManager,
+        'run',
         [DUMMY_TRANSACTION, MOCK__STATE_MANAGER.address]
       )
       console.log(`calculated gas cost of ${gasCost}`)
-      
-      let benchmark:number = 226_516
+
+      const benchmark: number = 226_516
       expect(gasCost).to.be.lte(benchmark)
       expect(gasCost).to.be.gte(
         benchmark - 1_000,
-        "Gas cost has significantly decreased, consider updating the benchmark to reflect the change"
+        'Gas cost has significantly decreased, consider updating the benchmark to reflect the change'
       )
     })
   })

packages/contracts/test/contracts/OVM/execution/OVM_ExecutionManager/nuisance-gas.spec.ts

@@ -4,16 +4,12 @@ import {
   TestDefinition,
   OVM_TX_GAS_LIMIT,
   NON_NULL_BYTES32,
-  REVERT_FLAGS,
   VERIFIED_EMPTY_CONTRACT_HASH,
   NUISANCE_GAS_COSTS,
   Helper_TestRunner_BYTELEN,
   ZERO_ADDRESS,
 } from '../../../../helpers'
 
-const DUMMY_REVERT_DATA =
-  '0xdeadbeef1e5420deadbeef1e5420deadbeef1e5420deadbeef1e5420deadbeef1e5420'
-
 const CREATED_CONTRACT_1 = '0x2bda4a99d5be88609d23b1e4ab5d1d34fb1c2feb'
 
 const FRESH_CALL_NUISANCE_GAS_COST =

packages/contracts/test/contracts/OVM/execution/OVM_ExecutionManager/ovmCREATEEOA.spec.ts

@@ -4,7 +4,6 @@ import {
   TestDefinition,
   OVM_TX_GAS_LIMIT,
   NON_NULL_BYTES32,
-  REVERT_FLAGS,
   VERIFIED_EMPTY_CONTRACT_HASH,
 } from '../../../../helpers'
 

packages/contracts/test/contracts/OVM/execution/OVM_ExecutionManager/ovmDELEGATECALL.spec.ts

@@ -3,9 +3,7 @@ import {
   ExecutionManagerTestRunner,
   TestDefinition,
   OVM_TX_GAS_LIMIT,
-  NULL_BYTES32,
   NON_NULL_BYTES32,
-  REVERT_FLAGS,
   DUMMY_BYTECODE,
   VERIFIED_EMPTY_CONTRACT_HASH,
 } from '../../../../helpers'

packages/contracts/test/contracts/OVM/execution/OVM_StateManager.gas-spec.ts

-import { expect } from '../../../setup'
+import '../../../setup'
 
 /* External Imports */
 import { ethers } from 'hardhat'
-import { Contract, ContractFactory, Signer, BigNumber } from 'ethers'
+import { Contract, ContractFactory, Signer } from 'ethers'
 import _ from 'lodash'
 
 /* Internal Imports */
@@ -29,7 +29,6 @@ describe('OVM_StateManager gas consumption', () => {
   })
 
   let Factory__OVM_StateManager: ContractFactory
-  let Helper_GasMeasurer: Contract
   let gasMeasurement: GasMeasurement
   before(async () => {
     Factory__OVM_StateManager = await ethers.getContractFactory(
@@ -39,14 +38,15 @@ describe('OVM_StateManager gas consumption', () => {
     await gasMeasurement.init(owner)
   })
 
-
   let OVM_StateManager: Contract
   beforeEach(async () => {
     OVM_StateManager = (
       await Factory__OVM_StateManager.deploy(await owner.getAddress())
     ).connect(owner)
 
-    await OVM_StateManager.setExecutionManager(gasMeasurement.GasMeasurementContract.address)
+    await OVM_StateManager.setExecutionManager(
+      gasMeasurement.GasMeasurementContract.address
+    )
   })
 
   const measure = (
@@ -58,7 +58,11 @@ describe('OVM_StateManager gas consumption', () => {
   ) => {
     it('measured consumption!', async () => {
       await doFirst()
-      let gasCost = await gasMeasurement.getGasCost(OVM_StateManager, methodName, methodArgs)
+      const gasCost = await gasMeasurement.getGasCost(
+        OVM_StateManager,
+        methodName,
+        methodArgs
+      )
       console.log(`          calculated gas cost of ${gasCost}`)
     })
   }
@@ -378,8 +382,8 @@ describe('OVM_StateManager gas consumption', () => {
 
   describe('putContractStorage', () => {
     const relevantValues = [DUMMY_VALUE_1, DUMMY_VALUE_2, STORAGE_XOR_VALUE]
-    for (let preValue of relevantValues) {
-      for (let postValue of relevantValues) {
+    for (const preValue of relevantValues) {
+      for (const postValue of relevantValues) {
         describe(`when overwriting ${preValue} with ${postValue}`, () => {
           measure(
             'putContractStorage',

packages/contracts/test/contracts/OVM/precompiles/OVM_ProxySequencerEntrypoint.spec.ts

@@ -4,12 +4,9 @@ import { expect } from '../../../setup'
 import { ethers, waffle } from 'hardhat'
 import { ContractFactory, Contract, Wallet } from 'ethers'
 import { MockContract, smockit } from '@eth-optimism/smock'
-import {
-  encodeSequencerCalldata,
-  DEFAULT_EIP155_TX,
-  ZERO_ADDRESS,
-  remove0x,
-} from '../../../helpers'
+
+/* Internal Imports */
+import { ZERO_ADDRESS, remove0x } from '../../../helpers'
 
 const callPrecompile = async (
   Helper_PrecompileCaller: Contract,

packages/contracts/test/contracts/OVM/precompiles/OVM_SequencerEntrypoint.spec.ts

@@ -3,20 +3,18 @@ import { expect } from '../../../setup'
 /* External Imports */
 import { waffle, ethers } from 'hardhat'
 import { ContractFactory, Wallet, Contract } from 'ethers'
-import { zeroPad } from '@ethersproject/bytes'
+import { smockit, MockContract } from '@eth-optimism/smock'
+
+/* Internal Imports */
 import { getContractInterface } from '../../../../src'
 import {
   encodeSequencerCalldata,
-  EIP155Transaction,
   signNativeTransaction,
   signEthSignMessage,
   DEFAULT_EIP155_TX,
   serializeNativeTransaction,
   serializeEthSignTransaction,
-  ZERO_ADDRESS,
 } from '../../../helpers'
-import { smockit, MockContract } from '@eth-optimism/smock'
-import { create } from 'lodash'
 
 describe('OVM_SequencerEntrypoint', () => {
   let wallet: Wallet

packages/contracts/test/contracts/OVM/verification/OVM_FraudVerifier.spec.ts

@@ -412,7 +412,7 @@ describe('OVM_FraudVerifier', () => {
 
       describe('multiple fraud proofs for the same pre-execution state', () => {
         let state2: any
-        let DUMMY_HASH_2 = hashTransaction(DUMMY_OVM_TRANSACTIONS[1])
+        const DUMMY_HASH_2 = hashTransaction(DUMMY_OVM_TRANSACTIONS[1])
         beforeEach(async () => {
           state2 = await smockit(
             await ethers.getContractFactory('OVM_StateTransitioner')

packages/contracts/test/contracts/OVM/verification/OVM_StateTransitioner.spec.ts

@@ -3,7 +3,7 @@ import { expect } from '../../../setup'
 
 /* External Imports */
 import { ethers } from 'hardhat'
-import { BigNumber, Contract, ContractFactory } from 'ethers'
+import { BigNumber, Contract } from 'ethers'
 import * as rlp from 'rlp'
 
 /* Internal Imports */
@@ -24,7 +24,6 @@ import {
   smoddit,
   ModifiableContractFactory,
 } from '@eth-optimism/smock'
-import { keccak256 } from 'ethers/lib/utils'
 
 describe('OVM_StateTransitioner', () => {
   let AddressManager: Contract
@@ -92,7 +91,7 @@ describe('OVM_StateTransitioner', () => {
   })
 
   describe('proveContractState', () => {
-    let ovmContractAddress = NON_ZERO_ADDRESS
+    const ovmContractAddress = NON_ZERO_ADDRESS
     let ethContractAddress = ZERO_ADDRESS
     let account: any
     beforeEach(() => {
@@ -109,7 +108,7 @@ describe('OVM_StateTransitioner', () => {
     describe('when provided a valid code hash', () => {
       beforeEach(async () => {
         ethContractAddress = OVM_StateTransitioner.address
-        account.codeHash = keccak256(
+        account.codeHash = ethers.utils.keccak256(
           await ethers.provider.getCode(OVM_StateTransitioner.address)
         )
       })
@@ -207,9 +206,9 @@ describe('OVM_StateTransitioner', () => {
       })
 
       describe('when provided an invalid slot inclusion proof', () => {
-        let key = keccak256('0x1234')
-        let val = keccak256('0x5678')
-        let proof = '0x'
+        const key = ethers.utils.keccak256('0x1234')
+        const val = ethers.utils.keccak256('0x5678')
+        const proof = '0x'
         beforeEach(async () => {
           const generator = await TrieTestGenerator.fromNodes({
             nodes: [
@@ -236,8 +235,8 @@ describe('OVM_StateTransitioner', () => {
       })
 
       describe('when provided a valid slot inclusion proof', () => {
-        let key = keccak256('0x1234')
-        let val = keccak256('0x5678')
+        const key = ethers.utils.keccak256('0x1234')
+        const val = ethers.utils.keccak256('0x5678')
         let proof: string
         beforeEach(async () => {
           const generator = await TrieTestGenerator.fromNodes({
@@ -329,7 +328,7 @@ describe('OVM_StateTransitioner', () => {
       })
     })
 
-    let ovmContractAddress = NON_ZERO_ADDRESS
+    const ovmContractAddress = NON_ZERO_ADDRESS
     let account: any
     beforeEach(() => {
       account = {
@@ -414,11 +413,11 @@ describe('OVM_StateTransitioner', () => {
       })
     })
 
-    let ovmContractAddress = NON_ZERO_ADDRESS
+    const ovmContractAddress = NON_ZERO_ADDRESS
     let account: any
-    let key = keccak256('0x1234')
-    let val = keccak256('0x5678')
-    let newVal = keccak256('0x4321')
+    const key = ethers.utils.keccak256('0x1234')
+    const val = ethers.utils.keccak256('0x5678')
+    const newVal = ethers.utils.keccak256('0x4321')
     beforeEach(() => {
       account = {
         nonce: 0,
@@ -460,9 +459,7 @@ describe('OVM_StateTransitioner', () => {
       })
 
       describe('with a valid proof', () => {
-        let accountTrieProof: string
         let storageTrieProof: string
-        let postStateRoot: string
         beforeEach(async () => {
           const storageGenerator = await TrieTestGenerator.fromNodes({
             nodes: [
@@ -505,11 +502,8 @@ describe('OVM_StateTransitioner', () => {
             isFresh: false,
           })
 
-          accountTrieProof = test.accountTrieWitness
           storageTrieProof = storageTest.proof
 
-          postStateRoot = test.newAccountTrieRoot
-
           OVM_StateTransitioner.smodify.put({
             postStateRoot: test.accountTrieRoot,
           })

packages/contracts/test/contracts/OVM/verification/OVM_StateTransitionerFactory.spec.ts

@@ -2,7 +2,7 @@ import { expect } from '../../../setup'
 
 /* External Imports */
 import { ethers } from 'hardhat'
-import { ContractFactory, Contract, BigNumber } from 'ethers'
+import { ContractFactory, Contract } from 'ethers'
 
 /* Internal Imports */
 import {

packages/contracts/test/contracts/libraries/codec/Lib_OVMCodec.spec.ts

 /* tslint:disable:no-empty */
-import { expect } from '../../../setup'
+import '../../../setup'
 
 /* Internal Imports */
 import { Lib_OVMCodec_TEST_JSON } from '../../../data'
-import { runJsonTest, toHexString } from '../../../helpers'
+import { runJsonTest } from '../../../helpers'
 
 describe.skip('Lib_OVMCodec', () => {
   describe('JSON tests', () => {

packages/contracts/test/contracts/libraries/rlp/Lib_RLPReader.spec.ts

-/* External Imports */
-import * as rlp from 'rlp'
-
 /* Internal Imports */
 import { Lib_RLPReader_TEST_JSON } from '../../../data'
-import { runJsonTest, toHexString } from '../../../helpers'
+import { runJsonTest } from '../../../helpers'
 
 describe('Lib_RLPReader', () => {
   describe('JSON tests', () => {

packages/contracts/test/contracts/libraries/trie/Lib_MerkleTrie.spec.ts

@@ -122,7 +122,7 @@ describe('Lib_MerkleTrie', () => {
             })
             it(`should revert when the first proof element is not the root node`, async () => {
               const test = await generator.makeInclusionProofTest(0)
-              let decodedProof = rlp.decode(test.proof)
+              const decodedProof = rlp.decode(test.proof)
               decodedProof[0].write('abcd', 8) // change the 1st element (root) of the proof
               const badProof = rlp.encode(decodedProof as rlp.Input)
               await expect(
@@ -156,7 +156,7 @@ describe('Lib_MerkleTrie', () => {
 
     it(`should revert on an incorrect proof node prefix`, async () => {
       const test = await generator.makeInclusionProofTest(0)
-      let decodedProof = rlp.decode(test.proof)
+      const decodedProof = rlp.decode(test.proof)
       decodedProof[0].write('a', 3) // change the prefix
       test.root = ethers.utils.keccak256(toHexString(decodedProof[0]))
       const badProof = rlp.encode(decodedProof as rlp.Input)

packages/contracts/test/helpers/codec/encoding.ts

 /* External Imports */
 import { ethers } from 'hardhat'
-import { zeroPad } from '@ethersproject/bytes'
 import { Wallet } from 'ethers'
-import {
-  remove0x,
-  numberToHexString,
-  hexStrToBuf,
-  makeAddressManager,
-} from '../'
+
+/* Internal Imports */
+import { remove0x, hexStrToBuf } from '../'
 import { ZERO_ADDRESS } from '../constants'
 
 export interface EIP155Transaction {
@@ -44,12 +40,12 @@ export const getSignedComponents = (signed: string): any[] => {
 }
 
 export const encodeCompactTransaction = (transaction: any): string => {
-  const nonce = zeroPad(transaction.nonce, 3)
-  const gasLimit = zeroPad(transaction.gasLimit, 3)
+  const nonce = ethers.utils.zeroPad(transaction.nonce, 3)
+  const gasLimit = ethers.utils.zeroPad(transaction.gasLimit, 3)
   if (transaction.gasPrice % 1000000 !== 0)
     throw Error('gas price must be a multiple of 1000000')
   const compressedGasPrice: any = transaction.gasPrice / 1000000
-  const gasPrice = zeroPad(compressedGasPrice, 3)
+  const gasPrice = ethers.utils.zeroPad(compressedGasPrice, 3)
   const to = !transaction.to.length
     ? hexStrToBuf(ZERO_ADDRESS)
     : hexStrToBuf(transaction.to)
@@ -96,15 +92,14 @@ export const signEthSignMessage = async (
   const transactionSignature = await wallet.signMessage(transactionHashBytes)
 
   const messageHash = ethers.utils.hashMessage(transactionHashBytes)
-  let [v, r, s] = getRawSignedComponents(transactionSignature).map(
+  const [v, r, s] = getRawSignedComponents(transactionSignature).map(
     (component) => {
       return remove0x(component)
     }
   )
-  v = '0' + (parseInt(v, 16) - 27)
   return {
     messageHash,
-    v,
+    v: '0' + (parseInt(v, 16) - 27),
     r,
     s,
   }
@@ -118,13 +113,14 @@ export const signNativeTransaction = async (
   const transactionSignature = await wallet.signTransaction(transaction)
 
   const messageHash = ethers.utils.keccak256(serializedTransaction)
-  let [v, r, s] = getSignedComponents(transactionSignature).map((component) => {
-    return remove0x(component)
-  })
-  v = '0' + (parseInt(v, 16) - transaction.chainId * 2 - 8 - 27)
+  const [v, r, s] = getSignedComponents(transactionSignature).map(
+    (component) => {
+      return remove0x(component)
+    }
+  )
   return {
     messageHash,
-    v,
+    v: '0' + (parseInt(v, 16) - transaction.chainId * 2 - 8 - 27),
     r,
     s,
   }

packages/contracts/test/helpers/gas/gas.ts

@@ -4,7 +4,7 @@ import { Contract, Signer } from 'ethers'
 export class GasMeasurement {
   GasMeasurementContract: Contract
 
-  public async init(wallet: Signer){
+  public async init(wallet: Signer) {
     this.GasMeasurementContract = await (
       await (await ethers.getContractFactory('Helper_GasMeasurer')).deploy()
     ).connect(wallet)
@@ -14,8 +14,7 @@ export class GasMeasurement {
     targetContract: Contract,
     methodName: string,
     methodArgs: Array<any> = []
-  ): Promise<number> 
-  {
+  ): Promise<number> {
     const gasCost: number = await this.GasMeasurementContract.callStatic.measureCallGas(
       targetContract.address,
       targetContract.interface.encodeFunctionData(methodName, methodArgs)

packages/contracts/test/helpers/test-runner/test-runner.ts

@@ -83,6 +83,7 @@ export class ExecutionManagerTestRunner {
   }
 
   public run(test: TestDefinition) {
+    // tslint:disable-next-line:ban-comma-operator
     ;(test.preState = merge(
       cloneDeep(this.defaultPreState),
       cloneDeep(test.preState)
@@ -255,7 +256,7 @@ export class ExecutionManagerTestRunner {
         return this.contracts.OVM_SafetyChecker.address
       } else if (kv === '$OVM_CALL_HELPER') {
         return this.contracts.Helper_TestRunner.address
-      } else if (kv == '$OVM_DEPLOYER_WHITELIST') {
+      } else if (kv === '$OVM_DEPLOYER_WHITELIST') {
         return this.contracts.OVM_DeployerWhitelist.address
       } else if (kv.startsWith('$DUMMY_OVM_ADDRESS_')) {
         return ExecutionManagerTestRunner.getDummyAddress(kv)

packages/contracts/test/helpers/utils/custom-deployer.ts

 import { Signer } from 'ethers'
-import { toHexString }  from '../../../src/utils' 
+import { toHexString } from '../../../src/utils'
 
-export const deployContractCode = async (code: string, signer: Signer, gasLimit: number): Promise<string> => {
+export const deployContractCode = async (
+  code: string,
+  signer: Signer,
+  gasLimit: number
+): Promise<string> => {
   // "Magic" prefix to be prepended to the contract code. Contains a series of opcodes that will
   // copy the given code into memory and return it, thereby storing at the contract address.
   const prefix = '0x600D380380600D6000396000f3'

packages/contracts/tsconfig.json

@@ -4,6 +4,7 @@
     "target": "es2017",
     "declaration": true,
     "noImplicitAny": false,
+    "noUnusedLocals": true,
     "removeComments": true,
     "noLib": false,
     "emitDecoratorMetadata": true,

packages/contracts/tslint.json

@@ -32,8 +32,7 @@
   "linterOptions": {
     "exclude": [
       "**/node_modules/**/*",
-      "bin/**/*",
-      "test/**/*"
+      "bin/**/*"
     ]
   } 
 }