itest: use universe based proof transfer for trustless swap

We don't want to use the development build only devrpc.ImportProof RPC,
since this scenario will be used by production build apps as well.
So we update the test to use the new taprpc.RegisterTransfer RPC
instead.

Author: guggero

itest/psbt_test.go

@@ -2424,10 +2424,31 @@ func testPsbtTrustlessSwap(t *harnessTest) {
 	// We also need to push the proof for this transfer to the universe
 	// server.
 	bobScriptKeyBytes := bobScriptKey.PubKey.SerializeCompressed()
+	bobOutputIndex := uint32(1)
+	transferTXID := finalPsbt.UnsignedTx.TxHash()
+	bobAssetOutpoint := fmt.Sprintf("%s:%d", transferTXID.String(),
+		bobOutputIndex)
 	transferProofUniRPC(
 		t, t.universeServer.service, bob, bobScriptKeyBytes, genInfo,
-		mintedAsset.AssetGroup,
-		logResp.Transfer.Outputs[0].Anchor.Outpoint,
+		mintedAsset.AssetGroup, bobAssetOutpoint,
+	)
+
+	// In order for Bob to expect this incoming transfer, we need to
+	// register it with the internal wallet of Bob.
+	registerResp, err := bob.RegisterTransfer(
+		ctxb, &taprpc.RegisterTransferRequest{
+			AssetId:   assetID[:],
+			GroupKey:  mintedAsset.AssetGroup.TweakedGroupKey,
+			ScriptKey: bobScriptKeyBytes,
+			Outpoint: &taprpc.OutPoint{
+				Txid:        transferTXID[:],
+				OutputIndex: bobOutputIndex,
+			},
+		},
+	)
+	require.NoError(t.t, err)
+	require.Equal(
+		t.t, bobScriptKeyBytes, registerResp.RegisteredAsset.ScriptKey,
 	)
 
 	bobAssets, err := bob.ListAssets(ctxb, &taprpc.ListAssetRequest{})
@@ -2436,6 +2457,8 @@ func testPsbtTrustlessSwap(t *harnessTest) {
 	// Verify that Bob now holds the asset.
 	require.Len(t.t, bobAssets.Assets, 1)
 	require.Equal(t.t, bobAssets.Assets[0].Amount, numUnits)
+
+	require.Equal(t.t, bobScriptKeyBytes, bobAssets.Assets[0].ScriptKey)
 }
 
 // testPsbtExternalCommit tests the ability to fully customize the BTC level of