Add request api

src/index.ts

@@ -231,6 +231,24 @@ export class IFrameEthereumProvider extends EventEmitter<
     return promise;
   }
 
+  /**
+   * Request the JSON RPC and return the result.
+   * @param method method to send to the parent provider
+   * @param params parameters to send
+   */
+  public async request<TParams = any[], TResult = any>(
+    method: string,
+    params?: TParams
+  ): Promise<TResult> {
+    const response = await this.execute<TParams, TResult, any>(method, params);
+
+    if ('error' in response) {
+      throw new RpcError(response.error.code, response.error.message);
+    } else {
+      return response.result;
+    }
+  }
+
   /**
    * Send the JSON RPC and return the result.
    * @param method method to send to the parent provider