initial commit

2023-05-09 21:40:31 +08:00
commit 240b79e7be
29 changed files with 6451 additions and 0 deletions
--- a/ts/prereqs/transfer.ts
+++ b/ts/prereqs/transfer.ts
@@ -0,0 +1,56 @@
+import { Transaction, SystemProgram, Connection, Keypair, LAMPORTS_PER_SOL, sendAndConfirmTransaction, PublicKey } from "@solana/web3.js"
+import wallet from "../dev-wallet.json"
+
+// Import our dev wallet keypair from the wallet file
+const from = Keypair.fromSecretKey(new Uint8Array(wallet));
+// Define our WBA public key
+const to = new PublicKey("GLtaTaYiTQrgz411iPJD79rsoee59HhEy18rtRdrhEUJ");
+
+//Create a Solana devnet connection
+const connection = new Connection("https://api.devnet.solana.com", "confirmed");
+
+(async () => {
+    try {
+        // Get balance of dev wallet
+        const balance = await connection.getBalance(from.publicKey)
+        console.log(`Balance: ${balance}`)
+
+        // Create a test transaction to calculate fees
+        const transaction = new Transaction().add(
+            SystemProgram.transfer({
+                fromPubkey: from.publicKey,
+                toPubkey: to,
+                lamports: balance,
+            })
+        );
+        transaction.recentBlockhash = (await connection.getLatestBlockhash('confirmed')).blockhash;
+        transaction.feePayer = from.publicKey;
+
+        // Calculate exact fee rate to transfer entire SOL amount out of account minus fees
+        const fee = (await connection.getFeeForMessage(transaction.compileMessage(), 'confirmed')).value || 0;
+
+
+        // Remove our transfer instruction to replace it
+        transaction.instructions.pop();
+
+        // Now add the instruction back with correct amount of lamports
+        transaction.add(
+            SystemProgram.transfer({
+                fromPubkey: from.publicKey,
+                toPubkey: to,
+                lamports: balance - fee,
+            })
+        );
+
+        // Sign transaction, broadcast, and confirm
+        const signature = await sendAndConfirmTransaction(
+            connection,
+            transaction,
+            [from]
+        );
+        console.log(`Success! Check out your TX here: 
+        https://explorer.solana.com/tx/${signature}?cluster=devnet`)
+    } catch(e) {
+        console.error(`Oops, something went wrong: ${e}`)
+    }
+})();