multi: add RemoveUTXOLease RPC

config.go

@@ -100,6 +100,8 @@ type Config struct {
 
 	AssetWallet tapfreighter.Wallet
 
+	CoinSelect *tapfreighter.CoinSelect
+
 	ChainPorter tapfreighter.Porter
 
 	BaseUniverse *universe.MintingArchive

perms/perms.go

@@ -108,6 +108,10 @@ var (
 			Entity: "assets",
 			Action: "read",
 		}},
+		"/assetwalletrpc.AssetWallet/RemoveUTXOLease": {{
+			Entity: "assets",
+			Action: "write",
+		}},
 		"/mintrpc.Mint/MintAsset": {{
 			Entity: "mint",
 			Action: "write",

rpcserver.go

@@ -3335,3 +3335,31 @@ func (r *rpcServer) QueryEvents(ctx context.Context,
 
 	return rpcStats, nil
 }
+
+// RemoveUTXOLease removes the lease/lock/reservation of the given managed
+// UTXO.
+func (r *rpcServer) RemoveUTXOLease(ctx context.Context,
+	in *wrpc.RemoveUTXOLeaseRequest) (*wrpc.RemoveUTXOLeaseResponse,
+	error) {
+
+	if in.Outpoint == nil {
+		return nil, fmt.Errorf("outpoint must be specified")
+	}
+
+	hash, err := chainhash.NewHash(in.Outpoint.Txid)
+	if err != nil {
+		return nil, fmt.Errorf("error parsing txid: %w", err)
+	}
+
+	outPoint := wire.OutPoint{
+		Hash:  *hash,
+		Index: in.Outpoint.OutputIndex,
+	}
+
+	err = r.cfg.CoinSelect.ReleaseCoins(ctx, outPoint)
+	if err != nil {
+		return nil, err
+	}
+
+	return &wrpc.RemoveUTXOLeaseResponse{}, nil
+}

tapcfg/server.go

@@ -261,6 +261,7 @@ func genServerConfig(cfg *Config, cfgLogger btclog.Logger,
 		AddrBook:     addrBook,
 		ProofArchive: proofArchive,
 		AssetWallet:  assetWallet,
+		CoinSelect:   coinSelect,
 		ChainPorter: tapfreighter.NewChainPorter(
 			&tapfreighter.ChainPorterConfig{
 				Signer:       virtualTxSigner,

taprpc/assetwalletrpc/assetwallet.proto

@@ -64,6 +64,13 @@ service AssetWallet {
     */
     rpc VerifyAssetOwnership (VerifyAssetOwnershipRequest)
         returns (VerifyAssetOwnershipResponse);
+
+    /*
+    RemoveUTXOLease removes the lease/lock/reservation of the given managed
+    UTXO.
+    */
+    rpc RemoveUTXOLease (RemoveUTXOLeaseRequest)
+        returns (RemoveUTXOLeaseResponse);
 }
 
 message FundVirtualPsbtRequest {
@@ -206,3 +213,11 @@ message VerifyAssetOwnershipRequest {
 message VerifyAssetOwnershipResponse {
     bool valid_proof = 1;
 }
+
+message RemoveUTXOLeaseRequest {
+    // The outpoint of the UTXO to remove the lease for.
+    OutPoint outpoint = 1;
+}
+
+message RemoveUTXOLeaseResponse {
+}

taprpc/assetwalletrpc/assetwallet.swagger.json

@@ -382,6 +382,9 @@
         }
       }
     },
+    "assetwalletrpcRemoveUTXOLeaseResponse": {
+      "type": "object"
+    },
     "assetwalletrpcSignVirtualPsbtRequest": {
       "type": "object",
       "properties": {