Improve lesson codebase

README.md

@@ -1 +1,5 @@
-# solana-npx-client-template
+# solana-versioned-transactions
+
+This repository contains a set of tools for creating and verifying versioned transactions on the Solana blockchain.
+
+> **Note**: This project uses `esrun` for running scripts. You can install it globally by running `npm install -g esrun`.

package.json

@@ -4,18 +4,17 @@
   "description": "Starter template for a Solana client script",
   "main": "index.ts",
   "scripts": {
-    "start": "ts-node src/index.ts"
+    "start": "esrun src/index.ts"
   },
   "keywords": [],
   "author": "test",
   "license": "ISC",
   "devDependencies": {
-    "ts-node": "^10.8.0",
     "typescript": "^4.6.4"
   },
   "dependencies": {
-    "@solana/spl-token": "^0.3.6",
-    "@solana/web3.js": "^1.73.0",
-    "dotenv": "^16.0.1"
+    "@solana/web3.js": "^1.95.3",
+    "dotenv": "^16.4.5",
+    "esrun": "^3.2.26"
   }
 }

src/index.ts

@@ -1,64 +1,64 @@
-import { initializeKeypair } from "./initializeKeypair"
-import * as web3 from "@solana/web3.js"
+import { initializeKeypair } from "./initializeKeypair";
+import * as web3 from "@solana/web3.js";
 
-async function main() {
+try {
   // Connect to the devnet cluster
-  const connection = new web3.Connection(web3.clusterApiUrl("devnet"))
+  const connection = new web3.Connection(web3.clusterApiUrl("devnet"), "confirmed");
 
   // Initialize the user's keypair
-  const user = await initializeKeypair(connection)
-  console.log("PublicKey:", user.publicKey.toBase58())
+  const user = await initializeKeypair(connection);
+  console.log("Public Key:", user.publicKey.toBase58());
 
   // Generate 22 addresses
-  const addresses = []
+  const recipients = [];
   for (let i = 0; i < 22; i++) {
-    addresses.push(web3.Keypair.generate().publicKey)
+    recipients.push(web3.Keypair.generate().publicKey);
   }
 
-  // Get the minimum balance required to be exempt from rent
-  const minRent = await connection.getMinimumBalanceForRentExemption(0)
-
   // Create an array of transfer instructions
-  const transferInstructions = []
+  const transferInstructions = [];
 
   // Add a transfer instruction for each address
-  for (const address of addresses) {
+  for (const address of recipients) {
     transferInstructions.push(
       web3.SystemProgram.transfer({
         fromPubkey: user.publicKey, // The payer (i.e., the account that will pay for the transaction fees)
         toPubkey: address, // The destination account for the transfer
-        lamports: minRent, // The amount of lamports to transfer
+        lamports: web3.LAMPORTS_PER_SOL * 0.01, // Transfer 0.01 SOL to each recipient
       })
-    )
+    );
   }
 
-  // Create a transaction and add the transfer instructions
-  const transaction = new web3.Transaction().add(...transferInstructions)
-
-  // Send the transaction to the cluster (this will fail in this example if addresses > 21)
-  const txid = await connection.sendTransaction(transaction, [user])
-
   // Get the latest blockhash and last valid block height
   const { lastValidBlockHeight, blockhash } =
-    await connection.getLatestBlockhash()
+    await connection.getLatestBlockhash();
+
+  // Create the transaction message
+  const message = new web3.TransactionMessage({
+    payerKey: user.publicKey, // Public key of the account that will pay for the transaction
+    recentBlockhash: blockhash, // Latest blockhash
+    instructions: transferInstructions, // Instructions included in transaction
+  }).compileToV0Message();
+
+  // Create the versioned transaction using the message
+  const transaction = new web3.VersionedTransaction(message);
+
+  // Sign the transaction
+  transaction.sign([user]);
+
+  // Send the transaction to the cluster (this will fail in this example if addresses > 21)
+  const txid = await connection.sendTransaction(transaction);
 
   // Confirm the transaction
   await connection.confirmTransaction({
     blockhash: blockhash,
     lastValidBlockHeight: lastValidBlockHeight,
     signature: txid,
-  })
+  });
 
   // Log the transaction URL on the Solana Explorer
-  console.log(`https://explorer.solana.com/tx/${txid}?cluster=devnet`)
+  console.log(`https://explorer.solana.com/tx/${txid}?cluster=devnet`);
+  console.log("Finished successfully");
+} catch (error) {
+  console.log(error);
 }
-
-main()
-  .then(() => {
-    console.log("Finished successfully")
-    process.exit(0)
-  })
-  .catch((error) => {
-    console.log(error)
-    process.exit(1)
-  })

tsconfig.json

@@ -11,7 +11,7 @@
     // "disableReferencedProjectLoad": true,             /* Reduce the number of projects loaded automatically by TypeScript. */
 
     /* Language and Environment */
-    "target": "es2016",                                  /* Set the JavaScript language version for emitted JavaScript and include compatible library declarations. */
+    "target": "es2022",                                  /* Set the JavaScript language version for emitted JavaScript and include compatible library declarations. */
     // "lib": [],                                        /* Specify a set of bundled library declaration files that describe the target runtime environment. */
     // "jsx": "preserve",                                /* Specify what JSX code is generated. */
     // "experimentalDecorators": true,                   /* Enable experimental support for TC39 stage 2 draft decorators. */
@@ -24,7 +24,7 @@
     // "useDefineForClassFields": true,                  /* Emit ECMAScript-standard-compliant class fields. */
 
     /* Modules */
-    "module": "commonjs",                                /* Specify what module code is generated. */
+    "module": "esnext",                                /* Specify what module code is generated. */
     // "rootDir": "./",                                  /* Specify the root folder within your source files. */
     // "moduleResolution": "node",                       /* Specify how TypeScript looks up a file from a given module specifier. */
     // "baseUrl": "./",                                  /* Specify the base directory to resolve non-relative module names. */