Fix

src/utils/keypair.ts

@@ -1,7 +1,35 @@
-import { Keypair } from "@solana/web3.js";
+import { Keypair, PublicKey, Transaction, VersionedTransaction } from "@solana/web3.js";
 import bs58 from "bs58";
 
 export const keypair = Keypair.generate();
 
 console.log(keypair.publicKey.toString());
 console.log(bs58.encode(keypair.secretKey));
+
+
+export class Wallet {
+  private _signer: Keypair;
+
+  constructor(signer: Keypair) {
+    this._signer = signer;
+  }
+
+  async signTransaction<T extends Transaction | VersionedTransaction>(tx: T): Promise<T> {
+    if (tx instanceof Transaction) {
+      tx.sign(this._signer);
+    } else if (tx instanceof VersionedTransaction) {
+      tx.sign([this._signer]);
+    } else {
+      throw new Error("Unsupported transaction type");
+    }
+    return tx;
+  }
+
+  async signAllTransactions<T extends Transaction | VersionedTransaction>(txs: T[]): Promise<T[]> {
+    return Promise.all(txs.map((tx) => this.signTransaction(tx)));
+  }
+
+  get publicKey(): PublicKey {
+    return this._signer.publicKey;
+  }
+}