fix[batch-submitter]: add same-address error

.changeset/long-mayflies-sit.md

+---
+'@eth-optimism/batch-submitter': patch
+---
+
+Throw an error when sequencer and proposer have the same address.

ops/docker-compose-nobuild.yml

@@ -17,9 +17,10 @@ services:
     environment:
         FRAUD_PROOF_WINDOW_SECONDS: 0
         L1_NODE_WEB3_URL: http://l1_chain:8545
-        # these keys are hardhat's first 2 accounts, DO NOT use in production
+        # these keys are hardhat's first 3 accounts, DO NOT use in production
         DEPLOYER_PRIVATE_KEY: "0xac0974bec39a17e36ba4a6b4d238ff944bacb478cbed5efcae784d7bf4f2ff80"
         SEQUENCER_PRIVATE_KEY: "0x59c6995e998f97a5a0044966f0945389dc9e86dae88c7a8412f4603b6b78690d"
+        PROPOSER_PRIVATE_KEY: "0x5de4111afa1a4b94908f83103eb1f1706367c2e68ca870fc3fb9a804cdab365a"
         GAS_PRICE_ORACLE_OWNER: "0xf39Fd6e51aad88F6F4ce6aB8827279cffFb92266"
         # setting the whitelist owner to address(0) disables the whitelist
         WHITELIST_OWNER: "0x0000000000000000000000000000000000000000"
@@ -93,6 +94,7 @@ services:
         L2_NODE_WEB3_URL: http://l2geth:8545
         URL: http://deployer:8081/addresses.json
         SEQUENCER_PRIVATE_KEY: "0x59c6995e998f97a5a0044966f0945389dc9e86dae88c7a8412f4603b6b78690d"
+        PROPOSER_PRIVATE_KEY: "0x5de4111afa1a4b94908f83103eb1f1706367c2e68ca870fc3fb9a804cdab365a"
 
   verifier:
     depends_on:

ops/docker-compose.yml

@@ -22,9 +22,10 @@ services:
     environment:
         FRAUD_PROOF_WINDOW_SECONDS: 0
         L1_NODE_WEB3_URL: http://l1_chain:8545
-        # these keys are hardhat's first 2 accounts, DO NOT use in production
+        # these keys are hardhat's first 3 accounts, DO NOT use in production
         DEPLOYER_PRIVATE_KEY: "0xac0974bec39a17e36ba4a6b4d238ff944bacb478cbed5efcae784d7bf4f2ff80"
         SEQUENCER_PRIVATE_KEY: "0x59c6995e998f97a5a0044966f0945389dc9e86dae88c7a8412f4603b6b78690d"
+        PROPOSER_PRIVATE_KEY: "0x5de4111afa1a4b94908f83103eb1f1706367c2e68ca870fc3fb9a804cdab365a"
         GAS_PRICE_ORACLE_OWNER: "0xf39Fd6e51aad88F6F4ce6aB8827279cffFb92266"
         # setting the whitelist owner to address(0) disables the whitelist
         WHITELIST_OWNER: "0x0000000000000000000000000000000000000000"
@@ -133,6 +134,7 @@ services:
         L2_NODE_WEB3_URL: http://l2geth:8545
         URL: http://deployer:8081/addresses.json
         SEQUENCER_PRIVATE_KEY: "0x59c6995e998f97a5a0044966f0945389dc9e86dae88c7a8412f4603b6b78690d"
+        PROPOSER_PRIVATE_KEY: "0x5de4111afa1a4b94908f83103eb1f1706367c2e68ca870fc3fb9a804cdab365a"
 
   verifier:
     depends_on:

packages/batch-submitter/src/exec/run-batch-submitter.ts

@@ -360,6 +360,9 @@ export const run = async () => {
   // If the sequencer & proposer are the same, use a single wallet
   if (sequencerAddress === proposerAddress) {
     proposerSigner = sequencerSigner
+    throw new Error(
+      'Sequencer and proposer have the same address, multiple transactions may be sent with the same nonce.'
+    )
   }
 
   logger.info('Configured batch submitter addresses', {

packages/contracts/bin/deploy.ts

@@ -21,6 +21,7 @@ process.env.CONTRACTS_RPC_URL =
 import hre from 'hardhat'
 
 const sequencer = new Wallet(process.env.SEQUENCER_PRIVATE_KEY)
+const proposer = new Wallet(process.env.PROPOSER_PRIVATE_KEY)
 const deployer = new Wallet(process.env.DEPLOYER_PRIVATE_KEY)
 
 const parseEnv = () => {
@@ -63,7 +64,7 @@ const main = async () => {
     sccFraudProofWindow: config.sccFraudProofWindow,
     sccSequencerPublishWindow: config.sccFraudProofWindow,
     ovmSequencerAddress: sequencer.address,
-    ovmProposerAddress: sequencer.address,
+    ovmProposerAddress: proposer.address,
     ovmAddressManagerOwner: deployer.address,
     numDeployConfirmations: 0,
     noCompile: process.env.NO_COMPILE ? true : false,