diff --git a/lib/wallets/models/tx_data.dart b/lib/wallets/models/tx_data.dart
index f8b3f6803..22101003c 100644
--- a/lib/wallets/models/tx_data.dart
+++ b/lib/wallets/models/tx_data.dart
@@ -5,6 +5,7 @@ import 'package:stackwallet/models/isar/models/isar_models.dart';
 import 'package:stackwallet/models/paynym/paynym_account_lite.dart';
 import 'package:stackwallet/utilities/amount/amount.dart';
 import 'package:stackwallet/utilities/enums/fee_rate_type_enum.dart';
+import 'package:stackwallet/wallets/isar/models/spark_coin.dart';
 import 'package:tezart/tezart.dart' as tezart;
 import 'package:web3dart/web3dart.dart' as web3dart;
 
@@ -69,6 +70,7 @@ class TxData {
         bool isChange,
       })>? sparkRecipients;
   final List<TxData>? sparkMints;
+  final List<SparkCoin>? usedSparkCoins;
 
   final TransactionV2? tempTx;
 
@@ -105,6 +107,7 @@ class TxData {
     this.tezosOperationsList,
     this.sparkRecipients,
     this.sparkMints,
+    this.usedSparkCoins,
     this.tempTx,
   });
 
@@ -187,6 +190,7 @@ class TxData {
             })>?
         sparkRecipients,
     List<TxData>? sparkMints,
+    List<SparkCoin>? usedSparkCoins,
     TransactionV2? tempTx,
   }) {
     return TxData(
@@ -224,6 +228,7 @@ class TxData {
       tezosOperationsList: tezosOperationsList ?? this.tezosOperationsList,
       sparkRecipients: sparkRecipients ?? this.sparkRecipients,
       sparkMints: sparkMints ?? this.sparkMints,
+      usedSparkCoins: usedSparkCoins ?? this.usedSparkCoins,
       tempTx: tempTx ?? this.tempTx,
     );
   }
@@ -262,6 +267,7 @@ class TxData {
       'tezosOperationsList: $tezosOperationsList, '
       'sparkRecipients: $sparkRecipients, '
       'sparkMints: $sparkMints, '
+      'usedSparkCoins: $usedSparkCoins, '
       'tempTx: $tempTx, '
       '}';
 }
diff --git a/lib/wallets/wallet/wallet_mixin_interfaces/spark_interface.dart b/lib/wallets/wallet/wallet_mixin_interfaces/spark_interface.dart
index b60e8c8a8..74848182e 100644
--- a/lib/wallets/wallet/wallet_mixin_interfaces/spark_interface.dart
+++ b/lib/wallets/wallet/wallet_mixin_interfaces/spark_interface.dart
@@ -499,6 +499,27 @@ mixin SparkInterface on Bip39HDWallet, ElectrumXInterface {
       ),
     );
 
+    final List<SparkCoin> usedSparkCoins = [];
+
+    for (final usedCoin in spend.usedCoins) {
+      try {
+        usedSparkCoins.add(coins
+            .firstWhere((e) =>
+                usedCoin.height == e.height &&
+                usedCoin.groupId == e.groupId &&
+                base64Decode(e.serializedCoinB64!)
+                    .toHex
+                    .startsWith(base64Decode(usedCoin.serializedCoin).toHex))
+            .copyWith(
+              isUsed: true,
+            ));
+      } catch (_) {
+        throw Exception(
+          "Unexpectedly did not find used spark coin. This should never happen.",
+        );
+      }
+    }
+
     return txData.copyWith(
       raw: rawTxHex,
       vSize: extractedTx.virtualSize(),
@@ -523,7 +544,7 @@ mixin SparkInterface on Bip39HDWallet, ElectrumXInterface {
         height: null,
         version: 3,
       ),
-      // TODO used coins
+      usedSparkCoins: usedSparkCoins,
     );
   }
 
@@ -540,17 +561,17 @@ mixin SparkInterface on Bip39HDWallet, ElectrumXInterface {
       Logging.instance.log("Sent txHash: $txHash", level: LogLevel.Info);
 
       txData = txData.copyWith(
-        // TODO mark spark coins as spent locally and update balance before waiting to check via electrumx?
-
-        // usedUTXOs:
-        // txData.usedUTXOs!.map((e) => e.copyWith(used: true)).toList(),
-
         // TODO revisit setting these both
         txHash: txHash,
         txid: txHash,
       );
-      // // mark utxos as used
-      // await mainDB.putUTXOs(txData.usedUTXOs!);
+
+      // Update used spark coins as used in database. They should already have
+      // been marked as isUsed.
+      // TODO: [prio=med] Could (probably should) throw an exception here if txData.usedSparkCoins is null or empty
+      if (txData.usedSparkCoins != null && txData.usedSparkCoins!.isNotEmpty) {
+        await _addOrUpdateSparkCoins(txData.usedSparkCoins!);
+      }
 
       return await updateSentCachedTxData(txData: txData);
     } catch (e, s) {
@@ -1499,6 +1520,13 @@ Future<
       Uint8List serializedSpendPayload,
       List<Uint8List> outputScripts,
       int fee,
+      List<
+          ({
+            int groupId,
+            int height,
+            String serializedCoin,
+            String serializedCoinContext
+          })> usedCoins,
     })> _createSparkSend(
     ({
       String privateKeyHex,
diff --git a/pubspec.lock b/pubspec.lock
index 07ee80f19..423323325 100644
--- a/pubspec.lock
+++ b/pubspec.lock
@@ -674,8 +674,8 @@ packages:
     dependency: "direct main"
     description:
       path: "."
-      ref: fb50031056fbea0326f7dd76ad59d165c1e5eee5
-      resolved-ref: fb50031056fbea0326f7dd76ad59d165c1e5eee5
+      ref: "3f986ca1a94bdac5d31373454c989cc2f5842de8"
+      resolved-ref: "3f986ca1a94bdac5d31373454c989cc2f5842de8"
       url: "https://github.com/cypherstack/flutter_libsparkmobile.git"
     source: git
     version: "0.0.1"
diff --git a/pubspec.yaml b/pubspec.yaml
index 13b50ee5e..44dc98d34 100644
--- a/pubspec.yaml
+++ b/pubspec.yaml
@@ -30,7 +30,7 @@ dependencies:
   flutter_libsparkmobile:
     git:
       url: https://github.com/cypherstack/flutter_libsparkmobile.git
-      ref: fb50031056fbea0326f7dd76ad59d165c1e5eee5
+      ref: 3f986ca1a94bdac5d31373454c989cc2f5842de8
 
   flutter_libmonero:
     path: ./crypto_plugins/flutter_libmonero