Simulate: Don't require wallet signature

ts/src/provider.ts

@@ -229,7 +229,9 @@ export class AnchorProvider implements Provider {
       )
     ).blockhash;
 
-    tx = await this.wallet.signTransaction(tx);
+    // Don't ask the wallet to sign
+    //tx = await this.wallet.signTransaction(tx);
+
     const result = await simulateTransaction(
       this.connection,
       tx,

ts/src/utils/rpc.ts

@@ -151,7 +151,7 @@ export async function simulateTransaction(
     };
   }
 
-  if (signers) {
+  if (signers && signers.length > 0) {
     config.sigVerify = true;
   }