tapgarden: only receive confirmed proof, improve logging

This commit is a small optimization in that we only start watching for a
proof on startup if we did receive a confirmation for it.

Author: guggero

tapgarden/custodian.go

@@ -284,6 +284,14 @@ func (c *Custodian) watchInboundAssets() {
 			continue
 		}
 
+		// If this event is not yet confirmed, we don't yet expect a
+		// proof to be delivered. We'll wait for the confirmation to
+		// come in, and then we'll launch a goroutine to use the
+		// ProofCourier to import the proof into our local DB.
+		if event.ConfirmationHeight == 0 {
+			continue
+		}
+
 		// If we didn't find a proof, we'll launch a goroutine to use
 		// the ProofCourier to import the proof into our local DB.
 		c.Wg.Add(1)
@@ -530,7 +538,8 @@ func (c *Custodian) receiveProof(addr *address.Tap, op wire.OutPoint) error {
 		ctx, headerVerifier, c.cfg.GroupVerifier, false, addrProof,
 	)
 	if err != nil {
-		return fmt.Errorf("unable to import proofs: %w", err)
+		return fmt.Errorf("unable to import proofs script_key=%x, "+
+			"asset_id=%x: %w", scriptKeyBytes, assetID[:], err)
 	}
 
 	// The proof is now verified and in our local archive. We will now

tapgarden/planter_test.go

@@ -11,8 +11,6 @@ import (
 	"testing"
 	"time"
 
-	"github.com/lightninglabs/taproot-assets/tapsend"
-
 	"github.com/btcsuite/btcd/blockchain"
 	"github.com/btcsuite/btcd/btcec/v2"
 	"github.com/btcsuite/btcd/btcutil"
@@ -30,6 +28,7 @@ import (
 	_ "github.com/lightninglabs/taproot-assets/tapdb" // Register relevant drivers.
 	"github.com/lightninglabs/taproot-assets/tapgarden"
 	"github.com/lightninglabs/taproot-assets/tapscript"
+	"github.com/lightninglabs/taproot-assets/tapsend"
 	"github.com/lightningnetwork/lnd/build"
 	"github.com/lightningnetwork/lnd/keychain"
 	"github.com/lightningnetwork/lnd/lntest/wait"