(Cherry-Pick)feat: Add rpc gw_get_pending_tx_hashes

packages/api-server/src/methods/modules/gw.ts

@@ -104,6 +104,10 @@ export class Gw {
       this.is_request_in_queue.bind(this),
       0
     );
+    this.get_pending_tx_hashes = middleware(
+      this.get_pending_tx_hashes.bind(this),
+      0
+    );
   }
 
   async ping(args: any[]) {
@@ -676,6 +680,15 @@ export class Gw {
       parseGwRpcError(error);
     }
   }
+
+  async get_pending_tx_hashes(args: any[]) {
+    try {
+      const result = await this.readonlyRpc.gw_get_pending_tx_hashes(...args);
+      return result;
+    } catch (error) {
+      parseGwRpcError(error);
+    }
+  }
 }
 
 function formatHexNumber(