add indexer gateway client (#619)

* add indexer-gateway

* fix chainId case

* update indexer-gateway client

packages/indexer/src/index.ts

@@ -1,6 +1,8 @@
 export * from './indexer.gen'
+export * as IndexerGateway from './indexergw.gen'
 
 import { Indexer as IndexerRpc } from './indexer.gen'
+import { IndexerGateway as IndexerGatewayRpc } from './indexergw.gen'
 
 export class SequenceIndexer extends IndexerRpc {
   constructor(
@@ -34,3 +36,36 @@ export class SequenceIndexer extends IndexerRpc {
     return fetch(input, init)
   }
 }
+
+export class SequenceIndexerGateway extends IndexerGatewayRpc {
+  constructor(
+    hostname: string,
+    public projectAccessKey?: string,
+    public jwtAuth?: string
+  ) {
+    super(hostname.endsWith('/') ? hostname.slice(0, -1) : hostname, fetch)
+    this.fetch = this._fetch
+  }
+
+  _fetch = (input: RequestInfo, init?: RequestInit): Promise<Response> => {
+    // automatically include jwt and access key auth header to requests
+    // if its been set on the api client
+    const headers: { [key: string]: any } = {}
+
+    const jwtAuth = this.jwtAuth
+    const projectAccessKey = this.projectAccessKey
+
+    if (jwtAuth && jwtAuth.length > 0) {
+      headers['Authorization'] = `BEARER ${jwtAuth}`
+    }
+
+    if (projectAccessKey && projectAccessKey.length > 0) {
+      headers['X-Access-Key'] = projectAccessKey
+    }
+
+    // before the request is made
+    init!.headers = { ...init!.headers, ...headers }
+
+    return fetch(input, init)
+  }
+}