From 64f7a713037d9157ca786a0949117d3a72a9596e Mon Sep 17 00:00:00 2001
From: fewensa <osuni@protonmail.com>
Date: Thu, 1 Aug 2024 07:13:22 +0000
Subject: [PATCH] Pick rpc

---
 template/ts/files/package.json     |  2 +-
 template/ts/files/src/helixconf.ts | 27 +++++++++++++++++++++++++++
 2 files changed, 28 insertions(+), 1 deletion(-)

diff --git a/template/ts/files/package.json b/template/ts/files/package.json
index 5d44ca0..99b54ea 100644
--- a/template/ts/files/package.json
+++ b/template/ts/files/package.json
@@ -1,6 +1,6 @@
 {
   "name": "@helixbridge/helixconf",
-  "version": "1.1.5",
+  "version": "1.1.6",
   "description": "Helix conf",
   "main": "dist/src/index.js",
   "publishConfig": {
diff --git a/template/ts/files/src/helixconf.ts b/template/ts/files/src/helixconf.ts
index 42b9248..345f6e9 100644
--- a/template/ts/files/src/helixconf.ts
+++ b/template/ts/files/src/helixconf.ts
@@ -53,6 +53,17 @@ export interface CoupleFilter {
   symbol?: string
 }
 
+export interface PickRPCOptions {
+  strategy: PickRPCStrategy,
+  picker?: (rpcs: string[]) => Promise<string>,
+}
+
+export enum PickRPCStrategy {
+  Custom,
+  First,
+  Best,
+}
+
 export interface HelixChainConfType {
   _network: _NetworkType
   id: bigint
@@ -116,6 +127,22 @@ export class HelixChainConf {
   //   this._data[key] = value;
   // }
 
+  async rpc(options?: PickRPCOptions): Promise<string> {
+    const strategy = options?.strategy ?? PickRPCStrategy.First;
+    switch (strategy) {
+      case PickRPCStrategy.Custom: {
+        if (!(options?.picker)) {
+          return this.rpcs[0];
+        }
+        return await options.picker(this.rpcs);
+      }
+      case PickRPCStrategy.First:
+      case PickRPCStrategy.Best:
+      default:
+        return this.rpcs[0];
+    }
+  }
+
   keys(): Array<keyof HelixChainConfType> {
     return Object.keys(this._data) as Array<keyof HelixChainConfType>;
   }