tapdb+tapsend+tapfreighter:add prevIds to constraints;valid for 1 prevId

tapdb/assets_store.go

@@ -883,6 +883,18 @@ func (a *AssetStore) constraintsToDbFilter(
 		assetFilter.AssetIDFilter = assetIDBytes
 		assetFilter.KeyGroupFilter = groupKeyBytes
 
+		// Check if there's exactly one PrevID and set the filters accordingly.
+		if len(query.PrevIDs) == 1 {
+			prevID := query.PrevIDs[0]
+			encodedOutpoint, err := encodeOutpoint(prevID.OutPoint)
+			if err == nil {
+				assetFilter.AnchorPoint = encodedOutpoint
+				assetFilter.TweakedScriptKey = prevID.ScriptKey.CopyBytes()
+			}
+			// If there's an error, we simply skip setting the fields
+			// TODO, maybe log error or return it?
+		}
+
 		// TODO(roasbeef): only want to allow asset ID or other and not
 		// both?
 

tapfreighter/coin_select.go

@@ -55,6 +55,7 @@ func (s *CoinSelect) SelectCoins(ctx context.Context,
 		AssetSpecifier: constraints.AssetSpecifier,
 		MinAmt:         1,
 		CoinSelectType: constraints.CoinSelectType,
+		PrevIDs:        constraints.PrevIDs,
 	}
 	eligibleCommitments, err := s.coinLister.ListEligibleCoins(
 		ctx, listConstraints,

tapfreighter/interface.go

@@ -35,6 +35,9 @@ type CommitmentConstraints struct {
 	// to satisfy the constraints.
 	MinAmt uint64
 
+	// PrevIDs are the set of inputs allowed to be used
+	PrevIDs []*asset.PrevID
+
 	// CoinSelectType is the type of coins that should be selected.
 	CoinSelectType tapsend.CoinSelectType
 }

tapfreighter/wallet.go

@@ -255,6 +255,11 @@ func (f *AssetWallet) FundAddressSend(ctx context.Context,
 		return nil, fmt.Errorf("unable to describe recipients: %w", err)
 	}
 
+	// We need to constrain the prevIDs if they are provided.
+	if len(prevIds) > 0 {
+		fundDesc.PrevIDs = prevIds
+	}
+
 	fundDesc.CoinSelectType = coinSelectType
 	fundedVPkt, err := f.FundPacket(ctx, fundDesc, vPkt)
 	if err != nil {
@@ -373,6 +378,7 @@ func (f *AssetWallet) FundPacket(ctx context.Context,
 		AssetSpecifier: fundDesc.AssetSpecifier,
 		MinAmt:         fundDesc.Amount,
 		CoinSelectType: fundDesc.CoinSelectType,
+		PrevIDs:        fundDesc.PrevIDs,
 	}
 
 	anchorVersion, err := tappsbt.CommitmentVersion(vPkt.Version)

tapsend/send.go

@@ -193,6 +193,9 @@ type FundingDescriptor struct {
 	// Amount is the amount of the asset to transfer.
 	Amount uint64
 
+	// PrevIDs is the set of inputs that can be used to fund the transfer.
+	PrevIDs []*asset.PrevID
+
 	// CoinSelectType specifies the type of coins that should be selected.
 	CoinSelectType CoinSelectType
 }