fix: adding sign and send to js

js/src/utils.ts

@@ -1,5 +1,13 @@
 import BN from 'bn.js';
 
+import {
+  Keypair,
+  Connection,
+  TransactionInstruction,
+  Transaction,
+  Commitment,
+} from "@solana/web3.js";
+
 export const generateRandomSeed = () => {
   // Generate a random seed
   let seed = '';
@@ -82,3 +90,39 @@ export class Numberu32 extends BN {
     );
   }
 }
+
+/**
+ * Sign and send transaction instructions
+ * @param connection The solana connection object to the RPC node
+ * @param signers The signers of the transaction
+ * @param feePayer The fee payer of the transaction
+ * @param txInstructions The instructions to
+ * @param skipPreflight Whether to skip the preflight check or not
+ * @param preflightCommitment The commitment to use for the preflight
+ * @param confirmCommitment The commitment to use for the transaction confirmation
+ * @returns The signature of the transaction as a string
+ */
+export const signAndSendInstructions = async (
+  connection: Connection,
+  signers: Array<Keypair>,
+  feePayer: Keypair,
+  txInstructions: Array<TransactionInstruction>,
+  skipPreflight: boolean = false,
+  preflightCommitment: Commitment = "confirmed",
+  confirmCommitment: Commitment = "confirmed"
+): Promise<string> => {
+  const tx = new Transaction();
+
+  tx.feePayer = feePayer.publicKey;
+
+  signers.push(feePayer);
+  tx.add(...txInstructions);
+
+  const signature = await connection.sendTransaction(tx, signers, {
+    skipPreflight,
+    preflightCommitment,
+  });
+
+  await connection.confirmTransaction(signature, confirmCommitment);
+  return signature;
+};