integration-tests: Support networks that aren't specified in the SDK

The SDK expects all L1 contracts to be specified if the L1 chain ID isn't well-known. This PR makes the integration test setup always specify the L1 contracts, since networks like the nightly don't use a well-known chain ID.

.changeset/short-news-cover.md

+---
+'@eth-optimism/integration-tests': patch
+---
+
+Support non-well-known networks

integration-tests/actor-tests/sends.test.ts

-import { utils, Wallet, BigNumber } from 'ethers'
+import { utils, Wallet } from 'ethers'
 import { expect } from 'chai'
 
 import { actor, setupRun, setupActor, run } from './lib/convenience'
@@ -34,6 +34,6 @@ actor('Value sender', () => {
         value: 0x42,
       })
     })
-    expect(await randWallet.getBalance()).to.deep.equal(BigNumber.from(0x42))
+    expect((await randWallet.getBalance()).toString()).to.deep.equal('66')
   })
 })

integration-tests/test/shared/env.ts

@@ -86,23 +86,11 @@ export class OptimismEnv {
 
   static async new(): Promise<OptimismEnv> {
     const network = await l1Provider.getNetwork()
-    const messenger = new CrossChainMessenger({
-      l1SignerOrProvider: l1Wallet,
-      l2SignerOrProvider: l2Wallet,
-      l1ChainId: network.chainId,
-    })
 
     const addressManager = getAddressManager(l1Wallet)
     const watcher = await initWatcher(l1Provider, l2Provider, addressManager)
     const l1Bridge = await getL1Bridge(l1Wallet, addressManager)
 
-    // fund the user if needed
-    const balance = await l2Wallet.getBalance()
-    const min = envConfig.L2_WALLET_MIN_BALANCE_ETH.toString()
-    const topUp = envConfig.L2_WALLET_TOP_UP_AMOUNT_ETH.toString()
-    if (balance.lt(utils.parseEther(min))) {
-      await fundUser(messenger, utils.parseEther(topUp))
-    }
     const l1Messenger = getContractFactory('L1CrossDomainMessenger')
       .connect(l1Wallet)
       .attach(watcher.l1.messengerAddress)
@@ -136,6 +124,30 @@ export class OptimismEnv {
       .connect(l2Wallet)
       .attach(predeploys.OVM_L1BlockNumber)
 
+    const messenger = new CrossChainMessenger({
+      l1SignerOrProvider: l1Wallet,
+      l2SignerOrProvider: l2Wallet,
+      l1ChainId: network.chainId,
+      contracts: {
+        l1: {
+          AddressManager: envConfig.ADDRESS_MANAGER,
+          L1CrossDomainMessenger: l1Messenger.address,
+          L1StandardBridge: l1Bridge.address,
+          StateCommitmentChain: sccAddress,
+          CanonicalTransactionChain: ctcAddress,
+          BondManager: await addressManager.getAddress('BondManager'),
+        },
+      },
+    })
+
+    // fund the user if needed
+    const balance = await l2Wallet.getBalance()
+    const min = envConfig.L2_WALLET_MIN_BALANCE_ETH.toString()
+    const topUp = envConfig.L2_WALLET_TOP_UP_AMOUNT_ETH.toString()
+    if (balance.lt(utils.parseEther(min))) {
+      await fundUser(messenger, utils.parseEther(topUp))
+    }
+
     return new OptimismEnv({
       addressManager,
       l1Bridge,