message-relayer: use `StaticJsonRpcProvider`

Reduce the number of requests sent by the message-relayer
in the docker setup to make the logs better

packages/message-relayer/src/exec/run.ts

@@ -81,8 +81,8 @@ const main = async () => {
     throw new Error('Must pass L2_NODE_WEB3_URL')
   }
 
-  const l2Provider = new providers.JsonRpcProvider(L2_NODE_WEB3_URL)
-  const l1Provider = new providers.JsonRpcProvider(L1_NODE_WEB3_URL)
+  const l2Provider = new providers.StaticJsonRpcProvider(L2_NODE_WEB3_URL)
+  const l1Provider = new providers.StaticJsonRpcProvider(L1_NODE_WEB3_URL)
 
   let wallet: Wallet
   if (L1_WALLET_KEY) {

packages/message-relayer/src/service.ts

@@ -16,8 +16,8 @@ import { StateRootBatchHeader, SentMessage, SentMessageProof } from './types'
 
 interface MessageRelayerOptions {
   // Providers for interacting with L1 and L2.
-  l1RpcProvider: providers.JsonRpcProvider
-  l2RpcProvider: providers.JsonRpcProvider
+  l1RpcProvider: providers.StaticJsonRpcProvider
+  l2RpcProvider: providers.StaticJsonRpcProvider
 
   // Address of the AddressManager contract, used to resolve the various addresses we'll need
   // within this service.