Feat utils and fixes

src/types/Transaction.ts

@@ -502,8 +502,6 @@ export class Transaction {
     const hex = new HexBytes(signature);
     const approval = new Approval(publicKey, hex);
 
-    this.approvals.push(approval);
-
     if (this.originTransactionV1) {
       this.originTransactionV1.approvals.push(approval);
     } else if (this.originDeployV1) {

src/types/keypair/PrivateKey.ts

@@ -78,12 +78,21 @@ export class PrivateKey {
     return this.priv.toPem();
   }
 
+  /**
+   * Signs a message using the private key.
+   * @param msg - The message to sign.
+   * @returns A promise resolving to the signature bytes.
+   */
+  public async sign(msg: Uint8Array): Promise<Uint8Array> {
+    return await this.priv.sign(msg);
+  }
+
   /**
    * Signs a message using the private key and includes the algorithm byte in the signature.
    * @param msg - The message to sign.
    * @returns A promise resolving to the signature bytes with the algorithm byte.
    */
-  public async sign(msg: Uint8Array): Promise<Uint8Array> {
+  public async signAndAddAlgorithmBytes(msg: Uint8Array): Promise<Uint8Array> {
     const signature = await this.priv.sign(msg);
     const algBytes = Uint8Array.of(this.alg);
     return concat([algBytes, signature]);