Update DAppSigner.ts (#170)

Signed-off-by: Tyler Cote <tyler8cote@gmail.com>
Signed-off-by: Fran Fernandez <fran@kabila.app>
Signed-off-by: Tyler McDonald <tyler@hgraph.io>
Co-authored-by: Tyler McDonald <tyler@hgraph.io>
Co-authored-by: Tyler <tyler+hgraphql@hgraph.io>
Co-authored-by: Fran Fernández <franfernandez20@gmail.com>

package.json

@@ -1,6 +1,6 @@
 {
   "name": "@hashgraph/hedera-wallet-connect",
-  "version": "1.3.0",
+  "version": "1.3.1",
   "description": "A library to facilitate integrating Hedera with WalletConnect",
   "repository": {
     "type": "git",

src/lib/dapp/DAppSigner.ts

@@ -173,10 +173,22 @@ export class DAppSigner implements Signer {
       .setTransactionId(TransactionId.generate(this.getAccountId()))
   }
 
+  /**
+   * Prepares a transaction object for signing using a single node account id.
+   * If the transaction object does not already have a node account id,
+   * generate a random node account id using the Hedera SDK client
+   *
+   * @param transaction - Any instance of a class that extends `Transaction`
+   * @returns transaction - `Transaction` object with signature
+   */
   async signTransaction<T extends Transaction>(transaction: T): Promise<T> {
+    let nodeAccountId: AccountId
+    if (!transaction.nodeAccountIds || transaction.nodeAccountIds.length === 0)
+      nodeAccountId = this._getRandomNodes(1)[0]
+    else nodeAccountId = transaction.nodeAccountIds[0]
     const transactionBody: proto.TransactionBody = transactionToTransactionBody(
       transaction,
-      this._getRandomNodes(1)[0],
+      nodeAccountId,
     )
     const transactionBodyBase64 = transactionBodyToBase64String(transactionBody)