fix: align wallet.ts with current Freighter API types

Freighter API methods return simple types (boolean, string) not
wrapper objects. Simplified all wallet helper functions accordingly.

Author: big14way

frontend/src/lib/wallet.ts

@@ -2,21 +2,16 @@ import freighter from "@stellar/freighter-api";
 
 export async function isFreighterInstalled(): Promise<boolean> {
   try {
-    const connected = await freighter.isConnected();
-    return connected;
+    return await freighter.isConnected();
   } catch {
     return false;
   }
 }
 
 export async function connectWallet(): Promise<string | null> {
   try {
-    const addressResult = await freighter.requestAccess();
-    if (addressResult.error) {
-      console.error("Freighter access denied:", addressResult.error);
-      return null;
-    }
-    return addressResult.address;
+    const address = await freighter.requestAccess();
+    return address;
   } catch (error) {
     console.error("Failed to connect wallet:", error);
     return null;
@@ -25,9 +20,7 @@ export async function connectWallet(): Promise<string | null> {
 
 export async function getPublicKey(): Promise<string | null> {
   try {
-    const result = await freighter.getAddress();
-    if (result.error) return null;
-    return result.address;
+    return await freighter.getAddress();
   } catch {
     return null;
   }
@@ -37,11 +30,7 @@ export async function signTransaction(
   xdr: string,
   networkPassphrase: string
 ): Promise<string> {
-  const result = await freighter.signTransaction(xdr, {
+  return await freighter.signTransaction(xdr, {
     networkPassphrase,
   });
-  if (result.error) {
-    throw new Error(`Failed to sign transaction: ${result.error}`);
-  }
-  return result.signedTxXdr;
 }