feat: add dRPCs

Author: fernandomg

typescript/ui/src/consts/chains.ts

@@ -1,10 +1,25 @@
 import { ChainMap, ChainMetadata } from '@hyperlane-xyz/sdk';
+import { ProtocolType } from '@hyperlane-xyz/utils';
 
 // A map of chain names to ChainMetadata
 // Chains can be defined here, in chains.json, or in chains.yaml
 // Chains already in the SDK need not be included here unless you want to override some fields
 // Schema here: https://github.com/hyperlane-xyz/hyperlane-monorepo/blob/main/typescript/sdk/src/metadata/chainMetadataTypes.ts
 export const chains: ChainMap<ChainMetadata & { mailbox?: Address }> = {
+  arbitrum: {
+    name: 'arbitrum',
+    protocol: ProtocolType.Ethereum,
+    chainId: 42161,
+    domainId: 42161,
+    rpcUrls: [{ http: 'https://arbitrum.drpc.org' }],
+  },
+  base: {
+    name: 'base',
+    protocol: ProtocolType.Ethereum,
+    chainId: 8453,
+    domainId: 8453,
+    rpcUrls: [{ http: 'https://base.drpc.org' }],
+  }
   // solanamainnet: {
   //   ...solanamainnet,
   //   // SVM chains require mailbox addresses for the token adapters