Adding Arbitrum chain

src/app.controller.ts

@@ -80,7 +80,7 @@ li {
 <a class="github-fork-ribbon" href="https://github.com/iainnash/ether.actor" data-ribbon="Fork me on GitHub" title="Fork me on GitHub">Fork me on GitHub</a>
 <p>powered by etherscan for ABIs and cloudflare for ethereum endpoints<p>
 <p>now querying ${hostFirst}. supports: <a href="https://ether.actor/">ethereum</a>, <a href="https://goerli.ether.actor">goerli</a>, <a href="https://polygon.ether.actor">polygon</a>, <a href="https://mumbai.ether.actor">mumbai</a></p>
-<p><a href="https://bsc.ether.actor/">bsc</a>, <a href="https://bsc-testnet.ether.actor">bsc-testnet</a>, <a href="https://kovan-optimism.ether.actor">kovan optimism</a>, <a href="https://optimism.ether.actor">optimism</a></p>
+<p><a href="https://bsc.ether.actor/">bsc</a>, <a href="https://bsc-testnet.ether.actor">bsc-testnet</a>, <a href="https://kovan-optimism.ether.actor">kovan optimism</a>, <a href="https://optimism.ether.actor">optimism</a>, <a href="https://arbitrum.ether.actor">arbitrum</a></p>
 <br />
 <p>try it:</p>
 <ul>

src/constants/chainid.ts

@@ -4,3 +4,4 @@ export const OPTIMISM_GOERLI_CHAIN = 420
 export const OPTIMISM_CHAIN = 10
 export const BASE_GOERLI_CHAIN = 84531
 export const BASE_CHAIN = 8453
+export const ARBITRUM_CHAIN = 42161;

src/ethereum/ethereum.module.ts

@@ -16,6 +16,7 @@ import {
   OPTIMISM_CHAIN,
   ZORA_CHAIN,
   ZORA_GOERLI_CHAIN,
+  ARBITRUM_CHAIN,
 } from 'src/constants/chainid';
 
 const NETWORK_CONFIGS = JSON.parse(process.env.RPC_NETWORK_CONFIGS);
@@ -115,6 +116,15 @@ const NETWORK_CONFIGS = JSON.parse(process.env.RPC_NETWORK_CONFIGS);
       custom: 'https://testnet.rpc.zora.energy',
       useDefaultProvider: false,
     }),
+    EthersModule.forRoot({
+      token: 'arbitrum',
+      network: {
+        chainId: ARBITRUM_CHAIN,
+        name: 'arbitrum',
+      },
+      custom: NETWORK_CONFIGS.arbitrum || 'https://arb1.arbitrum.io/rpc',
+      useDefaultProvider: false,
+    }),
   ],
 })
 export class EthereumModule {}

src/ethereum/ethereum.service.ts

@@ -9,7 +9,7 @@ import {
   MUMBAI_NETWORK,
 } from 'nestjs-ethers';
 import { EtherscanProvider, StaticJsonRpcProvider } from '@ethersproject/providers';
-import { OPTIMISM_CHAIN, OPTIMISM_GOERLI_CHAIN, ZORA_CHAIN, ZORA_GOERLI_CHAIN, BASE_CHAIN, BASE_GOERLI_CHAIN } from 'src/constants/chainid';
+import { OPTIMISM_CHAIN, OPTIMISM_GOERLI_CHAIN, ZORA_CHAIN, ZORA_GOERLI_CHAIN, BASE_CHAIN, BASE_GOERLI_CHAIN, ARBITRUM_CHAIN } from 'src/constants/chainid';
 
 // const last = EtherscanProvider.prototype.getBaseUrl;
 EtherscanProvider.prototype.getBaseUrl = function () {
@@ -52,6 +52,9 @@ EtherscanProvider.prototype.getBaseUrl = function () {
   if (this.network.chainId === BASE_CHAIN) {
     return 'https://api.basescan.org/';
   }
+  if (this.network.chainId === ARBITRUM_CHAIN) {
+    return 'https://api.arbiscan.io/';
+  }
 
   throw new Error('undefined chain');
 };
@@ -81,6 +84,8 @@ export class EthereumService {
     private readonly baseProvider: StaticJsonRpcProvider,
     @InjectEthersProvider('base-goerli')
     private readonly baseGoerliProvider: StaticJsonRpcProvider,
+    @InjectEthersProvider('arbitrum')
+    private readonly arbitrumProvider: StaticJsonRpcProvider,
   ) {}
 
   getNetworkId(host: string) {
@@ -117,6 +122,8 @@ export class EthereumService {
         return BASE_CHAIN;
       case 'base-goerli':
         return BASE_GOERLI_CHAIN;
+      case 'arbitrum':
+        return ARBITRUM_CHAIN;
     }
     throw new NotFoundException();
   }
@@ -149,6 +156,8 @@ export class EthereumService {
         return this.baseProvider;
       case BASE_GOERLI_CHAIN:
         return this.baseGoerliProvider;
+      case ARBITRUM_CHAIN:
+        return this.arbitrumProvider;
     }
   }