cake_wallet/cw_ethereum/lib/erc20_balance.dart

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import 'dart:convert';
import 'dart:math';
import 'package:cw_core/balance.dart';
class ERC20Balance extends Balance {
ERC20Balance(this.balance, {this.exponent = 18})
: super(balance.toInt(),
balance.toInt());
final BigInt balance;
final int exponent;
@override
String get formattedAdditionalBalance {
final String formattedBalance = (balance / BigInt.from(10).pow(exponent)).toString();
return formattedBalance.substring(0, min(12, formattedBalance.length));
}
@override
String get formattedAvailableBalance {
final String formattedBalance = (balance / BigInt.from(10).pow(exponent)).toString();
return formattedBalance.substring(0, min(12, formattedBalance.length));
}
String toJSON() => json.encode({
'balanceInWei': balance.toString(),
'exponent': exponent,
});
static ERC20Balance? fromJSON(String? jsonSource) {
if (jsonSource == null) {
return null;
}
final decoded = json.decode(jsonSource) as Map;
try {
return ERC20Balance(
BigInt.parse(decoded['balanceInWei']),
exponent: decoded['exponent'],
);
} catch (e) {
return ERC20Balance(BigInt.zero);
}
}
}