stack_wallet/lib/services/mixins/eth_token_cache.dart

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2023-03-01 21:52:13 +00:00
import 'package:stackwallet/db/hive/db.dart';
import 'package:stackwallet/models/isar/models/ethereum/eth_contract.dart';
import 'package:stackwallet/models/token_balance.dart';
abstract class _Keys {
static String tokenBalance(String contractAddress) {
return "tokenBalanceCache_$contractAddress";
}
}
mixin EthTokenCache {
late final String _walletId;
late final EthContract _token;
void initCache(String walletId, EthContract token) {
_walletId = walletId;
_token = token;
}
// token balance cache
TokenBalance getCachedBalance() {
final jsonString = DB.instance.get<dynamic>(
boxName: _walletId,
key: _Keys.tokenBalance(_token.address),
) as String?;
if (jsonString == null) {
return TokenBalance(
contractAddress: _token.address,
decimalPlaces: _token.decimals,
total: 0,
spendable: 0,
blockedTotal: 0,
pendingSpendable: 0,
);
}
return TokenBalance.fromJson(
jsonString,
);
}
Future<void> updateCachedBalance(TokenBalance balance) async {
await DB.instance.put<dynamic>(
boxName: _walletId,
key: _Keys.tokenBalance(_token.address),
value: balance.toJsonIgnoreCoin(),
);
}
}