feat(spl): add Solana token storage and state mgmt providers

diff --git a/lib/wallets/isar/models/wallet_info.dart b/lib/wallets/isar/models/wallet_info.dart
index 5b2d656..f4dbab5 100644
--- a/lib/wallets/isar/models/wallet_info.dart
+++ b/lib/wallets/isar/models/wallet_info.dart
@@ -75,6 +75,17 @@ class WalletInfo implements IsarId {
     }
   }
 
+  @ignore
+  List<String> get solanaTokenMintAddresses {
+    if (otherData[WalletInfoKeys.solanaTokenMintAddresses] is List) {
+      return List<String>.from(
+        otherData[WalletInfoKeys.solanaTokenMintAddresses] as List,
+      );
+    } else {
+      return [];
+    }
+  }
+
   /// Special case for coins such as firo lelantus
   @ignore
   Balance get cachedBalanceSecondary {
@@ -396,6 +407,19 @@ class WalletInfo implements IsarId {
     );
   }
 
+  /// Update Solana token mint addresses and update the db.
+  Future<void> updateSolanaTokenMintAddresses({
+    required Set<String> newMintAddresses,
+    required Isar isar,
+  }) async {
+    await updateOtherData(
+      newEntries: {
+        WalletInfoKeys.solanaTokenMintAddresses: newMintAddresses.toList(),
+      },
+      isar: isar,
+    );
+  }
+
   Future<void> setMwebEnabled({
     required bool newValue,
     required Isar isar,
@@ -524,4 +548,5 @@ abstract class WalletInfoKeys {
   static const String mwebScanHeight = "mwebScanHeightKey";
   static const String firoSparkUsedTagsCacheResetVersion =
       "firoSparkUsedTagsCacheResetVersionKey";
+  static const String solanaTokenMintAddresses = "solanaTokenMintAddressesKey";
 }
diff --git a/lib/wallets/isar/providers/solana/sol_tokens_provider.dart b/lib/wallets/isar/providers/solana/sol_tokens_provider.dart
new file mode 100644
index 0000000..1396a91
--- /dev/null
+++ b/lib/wallets/isar/providers/solana/sol_tokens_provider.dart
@@ -0,0 +1,30 @@
+/*
+ * This file is part of Stack Wallet.
+ *
+ * Copyright (c) 2025 Cypher Stack
+ * All Rights Reserved.
+ * The code is distributed under GPLv3 license, see LICENSE file for details.
+ *
+ */
+
+import 'package:flutter_riverpod/flutter_riverpod.dart';
+
+/// Provides a list of Solana token mint addresses for a specific wallet.
+///
+/// This provider returns the list of Solana SPL token mint addresses
+/// that the wallet has selected. Token details are not currently persisted
+/// in the database - only the mint addresses are stored in WalletInfo's otherData.
+///
+/// Example usage:
+/// ```
+/// final tokenAddresses = ref.watch(pSolanaWalletTokenAddresses('wallet_id'));
+/// ```
+/// Note: For full token details (name, symbol, decimals), these would need to be
+/// fetched from the Solana token metadata or a token list API.
+final pSolanaWalletTokens = Provider.family<List<String>, String>(
+  (ref, walletId) {
+    // TODO: Implement token details fetching from Solana metadata or API.
+    // For now, just return an empty list as token details are not persisted.
+    return [];
+  },
+);
diff --git a/lib/wallets/isar/providers/solana/sol_wallet_token_addresses_provider.dart b/lib/wallets/isar/providers/solana/sol_wallet_token_addresses_provider.dart
new file mode 100644
index 0000000..defccf4
--- /dev/null
+++ b/lib/wallets/isar/providers/solana/sol_wallet_token_addresses_provider.dart
@@ -0,0 +1,23 @@
+/*
+ * This file is part of Stack Wallet.
+ *
+ * Copyright (c) 2025 Cypher Stack
+ * All Rights Reserved.
+ * The code is distributed under GPLv3 license, see LICENSE file for details.
+ *
+ */
+
+import 'package:flutter_riverpod/flutter_riverpod.dart';
+
+import '../wallet_info_provider.dart';
+
+/// Provides the list of Solana SPL token mint addresses for a wallet.
+///
+/// This is a family provider that takes a walletId and returns the list of
+/// mint addresses from the WalletInfo's otherData.
+final pSolanaWalletTokenAddresses = Provider.family<List<String>, String>(
+  (ref, walletId) {
+    final walletInfo = ref.watch(pWalletInfo(walletId));
+    return walletInfo.solanaTokenMintAddresses;
+  },
+);