server works with backend via redis, serves chainInfo, more

blockchain.js

@@ -1,23 +1,13 @@
 import {ethers} from "ethers";
 
-export const chains = {}
-
-const _chainInfo = [
-    {id:42161, name:'Arbitrum'},
-]
-for( const chain of _chainInfo )
-    chains[chain.id] = chain
-
 const providers = {} // indexed by chain id
 
 export function getProvider(chainId) {
     let result = providers[chainId]
     if( result === undefined ) {
         let rpc_url = process.env['DEXORDER_RPC_URL_'+chainId]
-        if( rpc_url === undefined ) {
-            console.error(`WARNING: No provider found for chainId ${chainId}.  Using localhost.`)
-            rpc_url = 'http://localhost:8545'
-        }
+        if( rpc_url === undefined )
+            throw Error(`WARNING: No provider found for chainId ${chainId}.  Using localhost.`)
         result = rpc_url.startsWith('ws') ?
             new ethers.WebSocketProvider(rpc_url, chainId) :
             new ethers.JsonRpcProvider(rpc_url, chainId)