tapdb: add option to skip multi-verse insertion for leaves

In this commit, we add an option to skip multi-verse insertion. This is
useful as for the new burn and ignore trees, we won't put them in a
multi-verse of all the other ignore/burn trees. Instead, they'll go in a
special tree for a given group, which contains these trees as sub-trees.

Author: Roasbeef

tapdb/multiverse.go

@@ -766,7 +766,7 @@ func (b *MultiverseStore) UpsertProofLeaf(ctx context.Context,
 		// tree.
 		var err error
 		issuanceProof, err = universeUpsertProofLeaf(
-			ctx, dbTx, id, key, leaf, metaReveal,
+			ctx, dbTx, id, key, leaf, metaReveal, false,
 		)
 		if err != nil {
 			return err
@@ -812,7 +812,7 @@ func (b *MultiverseStore) UpsertProofLeafBatch(ctx context.Context,
 		// tree.
 		return universeUpsertProofLeaf(
 			ctx, dbTx, item.ID, item.Key, item.Leaf,
-			item.MetaReveal,
+			item.MetaReveal, false,
 		)
 	}
 

tapdb/universe.go

@@ -340,7 +340,7 @@ func (b *BaseUniverseTree) RegisterIssuance(ctx context.Context,
 	)
 	dbErr := b.db.ExecTx(ctx, &writeTx, func(dbTx BaseUniverseStore) error {
 		issuanceProof, err = universeUpsertProofLeaf(
-			ctx, dbTx, b.id, key, leaf, metaReveal,
+			ctx, dbTx, b.id, key, leaf, metaReveal, false,
 		)
 		return err
 	})
@@ -361,7 +361,8 @@ func (b *BaseUniverseTree) RegisterIssuance(ctx context.Context,
 // broader DB updates.
 func universeUpsertProofLeaf(ctx context.Context, dbTx BaseUniverseStore,
 	id universe.Identifier, key universe.LeafKey, leaf *universe.Leaf,
-	metaReveal *proof.MetaReveal) (*universe.Proof, error) {
+	metaReveal *proof.MetaReveal,
+	skipMultiverse bool) (*universe.Proof, error) {
 
 	namespace := id.String()
 
@@ -461,6 +462,20 @@ func universeUpsertProofLeaf(ctx context.Context, dbTx BaseUniverseStore,
 		return nil, err
 	}
 
+	// If this Universe tree isn't part of the greater multi-verse tree,
+	// then we'll skip insertion for now.
+	//
+	// TODO(roasbeef): will go into a combined multi-verse tree for diff
+	// proof types later
+	if skipMultiverse {
+		return &universe.Proof{
+			LeafKey:                key,
+			UniverseRoot:           universeRoot,
+			UniverseInclusionProof: leafInclusionProof,
+			Leaf:                   leaf,
+		}, nil
+	}
+
 	// The next step is to insert the multiverse leaf, which is a leaf in
 	// the multiverse tree that points to the universe leaf we just created.
 	multiverseNS, err := namespaceForProof(id.ProofType)