watcher: add sepolia

watcher/src/consts.ts

@@ -80,6 +80,7 @@ export const RPCS_BY_CHAIN: { [key in Environment]: { [key in ChainName]?: strin
     base: process.env.BASE_RPC,
     sei: process.env.SEI_RPC,
     wormchain: process.env.WORMCHAIN_RPC,
+    sepolia: process.env.SEPOLIA_RPC,
   },
   ['devnet']: {},
 };

watcher/src/index.ts

@@ -42,6 +42,7 @@ const supportedChains: ChainName[] =
         'base',
         'sei',
         // 'wormchain',
+        'sepolia',
       ]
     : [
         // This is the list of chains supported in MAINNET.

watcher/src/watchers/EVMWatcher.ts

@@ -1,5 +1,5 @@
 import { Implementation__factory } from '@certusone/wormhole-sdk/lib/cjs/ethers-contracts/factories/Implementation__factory';
-import { CONTRACTS, EVMChainName } from '@certusone/wormhole-sdk/lib/cjs/utils/consts';
+import { CONTRACTS, Contracts, EVMChainName } from '@certusone/wormhole-sdk/lib/cjs/utils/consts';
 import { Log } from '@ethersproject/abstract-provider';
 import axios from 'axios';
 import { BigNumber } from 'ethers';
@@ -206,7 +206,13 @@ export class EVMWatcher extends Watcher {
   }
 
   async getMessagesForBlocks(fromBlock: number, toBlock: number): Promise<VaasByBlock> {
-    const address = CONTRACTS.MAINNET[this.chain].core;
+    const contracts: Contracts =
+      this.network === 'mainnet'
+        ? CONTRACTS.MAINNET[this.chain]
+        : this.network === 'testnet'
+        ? CONTRACTS.TESTNET[this.chain]
+        : CONTRACTS.DEVNET[this.chain];
+    const address = contracts.core;
     if (!address) {
       throw new Error(`Core contract not defined for ${this.chain}`);
     }

watcher/src/watchers/Watcher.ts

@@ -74,6 +74,7 @@ export class Watcher {
             fromBlock = toBlock;
           }
           retry = 0;
+          this.logger.debug(`fromBlock = ${fromBlock}, toBlock = ${toBlock}`);
           await sleep(TIMEOUT);
         } catch (e) {
           // skip attempting to fetch messages until getting the finalized block succeeds

watcher/src/watchers/utils.ts

@@ -56,6 +56,8 @@ export function makeFinalizedWatcher(network: Environment, chainName: ChainName)
     return new SuiWatcher(network);
   } else if (chainName === 'wormchain') {
     return new WormchainWatcher(network);
+  } else if (chainName === 'sepolia' && network === 'testnet') {
+    return new EVMWatcher(network, chainName, 'finalized');
   } else {
     throw new Error(`Attempted to create finalized watcher for unsupported chain ${chainName}`);
   }