itest: return RPC response from SendAsset in sendAssetAndAssert

Update the sendAssetAndAssert integration test helper to return the
RPC response from the SendAsset call. This allows callers to access
the full response data for further assertions or processing.

Author: ffranr

itest/psbt_test.go

@@ -3619,10 +3619,19 @@ func sendToTapscriptAddr(ctx context.Context, t *harnessTest, alice,
 	AssertSendEventsComplete(t.t, bobAddr.ScriptKey, sendEvents)
 }
 
+// sendAssetAndAssertResponse is a struct that holds the response of a
+// sendAssetsToAddr call.
+type sendAssetAndAssertResponse struct {
+	// RpcResp is the response message returned by the SendAsset RPC
+	// endpoint.
+	RpcResp *taprpc.SendAssetResponse
+}
+
 func sendAssetAndAssert(ctx context.Context, t *harnessTest, alice,
 	bob *tapdHarness, numUnits, change uint64,
 	genInfo *taprpc.GenesisInfo, mintedAsset *taprpc.Asset,
-	outTransferIdx, numOutTransfers, numInTransfers int) {
+	outTransferIdx, numOutTransfers,
+	numInTransfers int) sendAssetAndAssertResponse {
 
 	// And finally, we make sure that we can send out one of the asset UTXOs
 	// that shared the anchor output and the other one is treated as a
@@ -3645,6 +3654,10 @@ func sendAssetAndAssert(ctx context.Context, t *harnessTest, alice,
 	// appear in that RPC output).
 	AssertNonInteractiveRecvComplete(t.t, bob, numInTransfers)
 	AssertSendEventsComplete(t.t, bobAddr.ScriptKey, sendEvents)
+
+	return sendAssetAndAssertResponse{
+		RpcResp: sendResp,
+	}
 }
 
 func signPacket(t *testing.T, lnd *node.HarnessNode,