Clean up lazer JS examples (#63)

* tidy up

* docs

Author: jayantk

lazer/js/README.md

@@ -0,0 +1,113 @@
+# Pyth Lazer JavaScript SDK Examples
+
+This directory contains JavaScript/TypeScript examples demonstrating how to use the Pyth Lazer SDK to interact with real-time price feeds and verify price updates on the Solana blockchain.
+
+## What is Pyth Lazer?
+
+Pyth Lazer is a high-performance, low-latency price feed service that provides real-time financial market data to blockchain applications. It supports multiple blockchain networks and offers both JSON and binary message formats for optimal performance.
+
+## Prerequisites
+
+Before running these examples, make sure you have the following installed:
+
+- **Node.js** (version 18 or higher)
+- **pnpm** package manager
+- A Lazer Access Token -- please see [How to Acquire an Access Token](https://docs.pyth.network/lazer/acquire-access-token) if you don't have one.
+
+## Installation
+
+1. Navigate to the `lazer/js` directory:
+   ```bash
+   cd lazer/js
+   ```
+
+2. Install dependencies:
+   ```bash
+   pnpm install
+   ```
+3. Configure your access token:
+    ```bash
+    export ACCESS_TOKEN=your_actual_token
+    ```
+
+## Basic Examples
+
+### 1. WebSocket Client Example (`src/index.ts`)
+Demonstrates how to connect to the Pyth Lazer WebSocket stream and receive real-time price updates.
+
+**What it does:**
+- Connects to the Pyth Lazer server
+- Subscribes to price feeds (IDs 1 and 2)
+- Listens for both JSON and binary messages
+- Displays received price data and connection status
+
+**How to run:**
+```bash
+pnpm run start
+```
+
+## Solana Examples
+
+### Prerequisites
+
+The Solana examples require a funded Solana private key stored in `./keypair.json`. 
+
+### 1. Post Solana Example (`src/solana/post_solana.ts`)
+Shows how to receive price data from Pyth Lazer and post it to a Solana smart contract.
+
+**What it does:**
+- Connects to Pyth Lazer and receives price feed data
+- Creates cryptographic instructions for Solana
+- Posts the price data to a deployed smart contract
+- Handles transaction confirmation
+
+**How to run:**
+```bash
+pnpm run start:post_solana
+```
+
+### 2. ECDSA Message Verification (`src/solana/verify_ecdsa_message.ts`)
+Demonstrates how to verify ECDSA-signed messages using the Pyth Lazer Solana contract.
+
+**What it does:**
+- Takes a hex-encoded message as input
+- Verifies the message using ECDSA signature verification
+- Interacts with the Pyth Lazer Solana program
+
+**How to run:**
+```bash
+pnpm run start:verify_ecdsa_message \
+  --url 'https://api.devnet.solana.com' \
+  --keypair-path './keypair.json' \
+  --message "e4bd474dda8934550d660e6ef4ee6ec1557349e283090c0107cad8bb997e67783a68be5646a5c949a8deaa6bee6ec1fc8aceb5002d6808b1da8ce5e9d26fd1b56ebeaf9d001c0075d3c793403ab1a9b03706000301010000000100eaf83297b5090000"
+```
+
+### 3. Ed25519 Message Verification (`src/solana/verify_ed25519_message.ts`)
+Shows how to verify Ed25519-signed messages using the Pyth Lazer Solana contract.
+
+**What it does:**
+- Takes a hex-encoded message as input
+- Creates Ed25519 verification instructions
+- Verifies the message using the Pyth Lazer Solana program
+
+**How to run:**
+```bash
+pnpm run start:verify_ed25519_message \
+  --url 'https://api.testnet.solana.com' \
+  --keypair-path './keypair.json' \
+  --message "b9011a82f3c5c2760beb0c78827c75b0b18f1d4a2dcddf9d3efb291e66de25927538deffd74606de833eff236022aaca7b8a79cf15d3c7b51a91b500b2b9e6ca64bcfa03f65210bee4fcf5b1cee1e537fabcfd95010297653b94af04d454fc473e94834f1c0075d3c793c03c26adb03706000301010000000100aa749416b4090000"
+```
+
+## Troubleshooting
+
+### Common Issues
+
+1. **Connection Errors**: Make sure you have a stable internet connection and the Pyth Lazer service is accessible.
+
+2. **Solana Transaction Failures**: Ensure your wallet has sufficient SOL for transaction fees and the correct network is configured.
+
+3. **Keypair Issues**: Make sure your Solana keypair file is in the correct format (JSON array of numbers) and the path is correct.
+
+## License
+
+This project is licensed under the Apache-2.0 License.

lazer/js/package.json

@@ -6,9 +6,9 @@
   "type": "module",
   "scripts": {
     "start": "node --loader ts-node/esm src/index.js",
-    "start:publish": "node --loader ts-node/esm src/publish.js",
-    "start:verify_ecdsa_message": "node --loader ts-node/esm src/verify_ecdsa_message.js",
-    "start:verify_ed25519_message": "node --loader ts-node/esm src/verify_ed25519_message.js",
+    "start:post_solana": "node --loader ts-node/esm src/solana/post_solana.js",
+    "start:verify_ecdsa_message": "node --loader ts-node/esm src/solana/verify_ecdsa_message.js",
+    "start:verify_ed25519_message": "node --loader ts-node/esm src/solana/verify_ed25519_message.js",
     "test": "pnpm run test:format && pnpm run test:types && pnpm run build:cjs && pnpm run build:esm",
     "build:cjs": "tsc --project tsconfig.json --verbatimModuleSyntax false --module commonjs --outDir ./dist/cjs && echo '{\"type\":\"commonjs\"}' > dist/cjs/package.json",
     "build:esm": "tsc --project tsconfig.json --outDir ./dist/esm && echo '{\"type\":\"module\"}' > dist/esm/package.json",

lazer/js/src/index.ts

@@ -2,8 +2,8 @@ import { PythLazerClient } from "@pythnetwork/pyth-lazer-sdk";
 
 const main = async () => {
   const client = await PythLazerClient.create({
-    urls: ["wss://pyth-lazer-staging.dourolabs.app/v1/stream"],
-    token: "my_token",
+    urls: ["wss://pyth-lazer.dourolabs.app/v1/stream"],
+    token: process.env.ACCESS_TOKEN!,
   });
 
   client.addMessageListener((message) => {

lazer/js/src/publish.ts renamed to lazer/js/src/solana/post_solana.ts

@@ -15,7 +15,7 @@ import { SYSVAR_INSTRUCTIONS_PUBKEY } from "@solana/web3.js";
 
 const SOLANA_RPC_URL = "https://api.devnet.solana.com";
 const PAYER_SECRET_KEY = Uint8Array.from(
-  JSON.parse(fs.readFileSync("/path/to/private-key.json", "utf8")) as number[],
+  JSON.parse(fs.readFileSync("./keypair.json", "utf8")) as number[],
 );
 // Program ID of the example contract on devnet
 const PROGRAM_ID = "HU64YGK66e1wdxD83D3snGuZEvfhM4YDdYShTfQvf6nm";
@@ -35,8 +35,8 @@ const connection = new Connection(SOLANA_RPC_URL, "confirmed");
 const payer = Keypair.fromSecretKey(PAYER_SECRET_KEY);
 const main = async () => {
   const client = await PythLazerClient.create({
-    urls: ["wss://pyth-lazer-staging.dourolabs.app/v1/stream"],
-    token: "my_token",
+    urls: ["wss://pyth-lazer.dourolabs.app/v1/stream"],
+    token: process.env.ACCESS_TOKEN!,
   });
 
   // data received from pyth lazer