From bf5955e7b66e25e349f41884de79f13a3e04a044 Mon Sep 17 00:00:00 2001
From: Saurabh Chauhan <36479565+starc007@users.noreply.github.com>
Date: Sat, 28 Dec 2024 23:45:49 +0530
Subject: [PATCH 1/2] fix: cache provider instance for better performance

---
 src/read/balance.ts |  7 ++-----
 src/utils/setup.ts  | 16 ++++++++++++----
 2 files changed, 14 insertions(+), 9 deletions(-)

diff --git a/src/read/balance.ts b/src/read/balance.ts
index 1954e58..d136882 100644
--- a/src/read/balance.ts
+++ b/src/read/balance.ts
@@ -1,6 +1,5 @@
-import { Provider } from 'fuels';
 import { getAllVerifiedFuelAssets } from '../utils/assets.js';
-import { setupWallet } from '../utils/setup.js';
+import { setupWallet, getProvider } from '../utils/setup.js';
 
 export type GetOwnBalanceParams = {
   symbol: string;
@@ -32,9 +31,7 @@ export type GetBalanceParams = {
 };
 
 export const getBalance = async (params: GetBalanceParams) => {
-  const provider = await Provider.create(
-    'https://mainnet.fuel.network/v1/graphql',
-  );
+  const provider = await getProvider();
 
   const allAssets = await getAllVerifiedFuelAssets();
   const asset = allAssets.find((asset) => asset.symbol === params.assetSymbol);
diff --git a/src/utils/setup.ts b/src/utils/setup.ts
index 043ca45..90ba1d0 100644
--- a/src/utils/setup.ts
+++ b/src/utils/setup.ts
@@ -1,10 +1,18 @@
 import { Provider, Wallet } from 'fuels';
 
-export const setupWallet = async (privateKey: string) => {
-  const provider = await Provider.create(
-    'https://mainnet.fuel.network/v1/graphql',
-  );
+let cachedProvider: Provider | null = null;
+
+export const getProvider = async () => {
+  if (!cachedProvider) {
+    cachedProvider = await Provider.create(
+      'https://mainnet.fuel.network/v1/graphql',
+    );
+  }
+  return cachedProvider;
+};
 
+export const setupWallet = async (privateKey: string) => {
+  const provider = await getProvider();
   const wallet = Wallet.fromPrivateKey(privateKey, provider);
 
   return {

From 625e90cc33888f4d56c0092aa431cebcf61306af Mon Sep 17 00:00:00 2001
From: Saurabh Chauhan <36479565+starc007@users.noreply.github.com>
Date: Sat, 28 Dec 2024 23:54:52 +0530
Subject: [PATCH 2/2] refactor: implement Provider singleton pattern

---
 src/read/balance.ts |  4 ++--
 src/utils/setup.ts  | 22 +++++++++++++---------
 2 files changed, 15 insertions(+), 11 deletions(-)

diff --git a/src/read/balance.ts b/src/read/balance.ts
index d136882..8e47f92 100644
--- a/src/read/balance.ts
+++ b/src/read/balance.ts
@@ -1,5 +1,5 @@
 import { getAllVerifiedFuelAssets } from '../utils/assets.js';
-import { setupWallet, getProvider } from '../utils/setup.js';
+import { setupWallet, ProviderInstance } from '../utils/setup.js';
 
 export type GetOwnBalanceParams = {
   symbol: string;
@@ -31,7 +31,7 @@ export type GetBalanceParams = {
 };
 
 export const getBalance = async (params: GetBalanceParams) => {
-  const provider = await getProvider();
+  const provider = await ProviderInstance.getProvider();
 
   const allAssets = await getAllVerifiedFuelAssets();
   const asset = allAssets.find((asset) => asset.symbol === params.assetSymbol);
diff --git a/src/utils/setup.ts b/src/utils/setup.ts
index 90ba1d0..1a12a65 100644
--- a/src/utils/setup.ts
+++ b/src/utils/setup.ts
@@ -1,18 +1,22 @@
 import { Provider, Wallet } from 'fuels';
 
-let cachedProvider: Provider | null = null;
+export class ProviderInstance {
+  private static instance: Provider | null = null;
+  private static readonly PROVIDER_URL =
+    'https://mainnet.fuel.network/v1/graphql';
 
-export const getProvider = async () => {
-  if (!cachedProvider) {
-    cachedProvider = await Provider.create(
-      'https://mainnet.fuel.network/v1/graphql',
-    );
+  private constructor() {} // Prevent direct construction
+
+  public static async getProvider(): Promise<Provider> {
+    if (!ProviderInstance.instance) {
+      ProviderInstance.instance = await Provider.create(this.PROVIDER_URL);
+    }
+    return ProviderInstance.instance;
   }
-  return cachedProvider;
-};
+}
 
 export const setupWallet = async (privateKey: string) => {
-  const provider = await getProvider();
+  const provider = await ProviderInstance.getProvider();
   const wallet = Wallet.fromPrivateKey(privateKey, provider);
 
   return {