feat(c-mon): Add wallet-mon service

.changeset/moody-foxes-enjoy.md

+---
+'@eth-optimism/chain-mon': minor
+'@eth-optimism/core-utils': patch
+---
+
+Added a new service wallet-mon to identify unexpected transfers from key accounts

ops/docker/Dockerfile.packages

@@ -89,3 +89,7 @@ ENTRYPOINT ["npm", "run", "start:drippie-mon"]
 FROM base as wd-mon
 WORKDIR /opt/optimism/packages/chain-mon
 ENTRYPOINT ["yarn", "run", "start:wd-mon"]
+
+FROM base as wallet-mon
+WORKDIR /opt/optimism/packages/chain-mon
+ENTRYPOINT ["yarn", "run", "start:wallet-mon"]

packages/chain-mon/.env.example

@@ -8,6 +8,16 @@ BALANCE_MON__RPC=
 # JSON array in the format [{ "address": <address>, "nickname": <nickname> }, ... ]
 BALANCE_MON__ACCOUNTS=
 
+###############################################################################
+#                               ↓ wallet-mon ↓                                #
+###############################################################################
+
+# RPC pointing to network to monitor
+WALLET_MON__RPC=
+
+# The block number to start monitoring from
+WALLET_MON__START_BLOCK_NUMBER=
+
 ###############################################################################
 #                               ↓ drippie-mon ↓                               #
 ###############################################################################

packages/chain-mon/package.json

@@ -10,6 +10,7 @@
   ],
   "scripts": {
     "start:balance-mon": "ts-node ./src/balance-mon/service.ts",
+    "start:wallet-mon": "ts-node ./src/wallet-mon/service.ts",
     "start:drippie-mon": "ts-node ./src/drippie-mon/service.ts",
     "start:wd-mon": "ts-node ./src/wd-mon/service.ts",
     "test:coverage": "echo 'No tests defined.'",
@@ -35,6 +36,7 @@
   "dependencies": {
     "@eth-optimism/common-ts": "0.8.1",
     "@eth-optimism/contracts-periphery": "1.0.8",
+    "@eth-optimism/contracts-bedrock": "0.14.0",
     "@eth-optimism/core-utils": "0.12.0",
     "@eth-optimism/sdk": "2.1.0",
     "ethers": "^5.7.0",

packages/chain-mon/src/index.ts

 export * from './balance-mon/service'
 export * from './drippie-mon/service'
 export * from './wd-mon/service'
+export * from './wallet-mon/service'

packages/chain-mon/src/wallet-mon/service.ts

+import {
+  BaseServiceV2,
+  StandardOptions,
+  Gauge,
+  Counter,
+  validators,
+  waitForProvider,
+} from '@eth-optimism/common-ts'
+import { getChainId, compareAddrs } from '@eth-optimism/core-utils'
+import { Provider } from '@ethersproject/abstract-provider'
+import mainnetConfig from '@eth-optimism/contracts-bedrock/deploy-config/mainnet.json'
+import goerliConfig from '@eth-optimism/contracts-bedrock/deploy-config/goerli.json'
+import l2OutputOracleArtifactsMainnet from '@eth-optimism/contracts-bedrock/deployments/mainnet/L2OutputOracleProxy.json'
+import l2OutputOracleArtifactsGoerli from '@eth-optimism/contracts-bedrock/deployments/goerli/L2OutputOracleProxy.json'
+
+import { version } from '../../package.json'
+
+const networks = {
+  1: 'mainnet',
+  10: 'goerli',
+}
+
+const bedrockAccounts = {
+  mainnet: [
+    {
+      label: 'Proposer',
+      wallet: mainnetConfig.l2OutputOracleProposer,
+      target: l2OutputOracleArtifactsMainnet.address,
+    },
+    {
+      label: 'Batcher',
+      wallet: mainnetConfig.batchSenderAddress,
+      target: mainnetConfig.batchInboxAddress,
+    },
+  ],
+  goerli: [
+    {
+      label: 'Proposer',
+      wallet: goerliConfig.l2OutputOracleProposer,
+      target: l2OutputOracleArtifactsGoerli.address,
+    },
+    {
+      label: 'Batcher',
+      wallet: goerliConfig.batchSenderAddress,
+      target: goerliConfig.batchInboxAddress,
+    },
+  ],
+}
+
+type TransferMonOptions = {
+  rpc: Provider
+  startBlockNumber: number
+}
+
+type TransferMonMetrics = {
+  validatedCalls: Counter
+  unexpectedCalls: Counter
+  unexpectedRpcErrors: Counter
+}
+
+type TransferMonState = {
+  chainId: number
+  highestUncheckedBlockNumber: number
+}
+
+export class TransferMonService extends BaseServiceV2<
+  TransferMonOptions,
+  TransferMonMetrics,
+  TransferMonState
+> {
+  constructor(options?: Partial<TransferMonOptions & StandardOptions>) {
+    super({
+      version,
+      name: 'transfer-mon',
+      loop: true,
+      options: {
+        loopIntervalMs: 60_000,
+        ...options,
+      },
+      optionsSpec: {
+        rpc: {
+          validator: validators.provider,
+          desc: 'Provider for network to monitor balances on',
+        },
+        startBlockNumber: {
+          validator: validators.num,
+          default: -1,
+          desc: 'L1 block number to start checking from',
+          public: true,
+        },
+      },
+      metricsSpec: {
+        validatedCalls: {
+          type: Gauge,
+          desc: 'Transactions from the account checked',
+          labels: ['wallet', 'target', 'nickname'],
+        },
+        unexpectedCalls: {
+          type: Counter,
+          desc: 'Number of unexpected transfers',
+          labels: ['wallet', 'target', 'nickname'],
+        },
+        unexpectedRpcErrors: {
+          type: Counter,
+          desc: 'Number of unexpected RPC errors',
+          labels: ['section', 'name'],
+        },
+      },
+    })
+  }
+
+  protected async init(): Promise<void> {
+    // Connect to L1.
+    await waitForProvider(this.options.rpc, {
+      logger: this.logger,
+      name: 'L1',
+    })
+
+    this.state.chainId = await getChainId(this.options.rpc)
+
+    if (this.options.startBlockNumber === -1) {
+      this.state.highestUncheckedBlockNumber =
+        await this.options.rpc.getBlockNumber()
+    } else {
+      this.state.highestUncheckedBlockNumber = this.options.startBlockNumber
+    }
+  }
+
+  protected async main(): Promise<void> {
+    // get the next unchecked block
+    const network = networks[this.state.chainId]
+    const accounts = bedrockAccounts[network]
+
+    const block = await this.options.rpc.getBlock(
+      this.state.highestUncheckedBlockNumber
+    )
+
+    for (const txHash of block.transactions) {
+      for (const account of accounts) {
+        const tx = await this.options.rpc.getTransaction(txHash)
+
+        if (compareAddrs(account.wallet, tx.from)) {
+          if (compareAddrs(account.target, tx.to)) {
+            this.metrics.validatedCalls.inc({
+              label: account.label,
+              wallet: account.address,
+              target: account.target,
+            })
+            this.logger.info('validated call', {
+              label: account.label,
+              wallet: account.address,
+              target: account.target,
+            })
+          } else {
+            this.metrics.unexpectedCalls.inc({
+              label: account.label,
+              wallet: account.address,
+              target: tx.to,
+            })
+            this.logger.error('Unexpected call detected', {
+              label: account.label,
+              address: account.address,
+              target: tx.to,
+            })
+          }
+        }
+      }
+    }
+  }
+}
+
+if (require.main === module) {
+  const service = new TransferMonService()
+  service.run()
+}

packages/core-utils/src/common/misc.ts

@@ -48,3 +48,14 @@ export const reqenv = (name: string): string => {
 export const getenv = (name: string, fallback?: string): string | undefined => {
   return process.env[name] || fallback
 }
+
+/**
+ * Returns true if the given string is a valid address.
+ *
+ * @param a First address to check.
+ * @param b Second address to check.
+ * @returns True if the given addresses match.
+ */
+export const compareAddrs = (a: string, b: string): boolean => {
+  return a.toLowerCase() === b.toLowerCase()
+}