119 lines
2.8 KiB
Dart
119 lines
2.8 KiB
Dart
enum TransferKind { topUp, exchange, payout }
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enum OperationStatus { pending, completed, failed }
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enum WalletError {
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unavailable,
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invalidAmount,
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insufficientFunds,
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limitExceeded,
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expiredQuote,
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invalidRecipient,
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unsupported,
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notFound,
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uncertain,
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}
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class WalletException implements Exception {
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const WalletException(this.code);
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final WalletError code;
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}
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class CurrencyAccount {
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const CurrencyAccount({
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required this.id,
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required this.currency,
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required this.precision,
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required this.available,
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this.payoutMethod = '',
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this.payoutLabel = '',
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this.canFund = true,
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});
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final String id, currency;
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final int precision, available;
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final String payoutMethod, payoutLabel;
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final bool canFund;
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/// Locale-aware decimal input, integer money. Grouping/exponents are rejected.
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int? parse(String input) {
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final value = input.trim().replaceAll(',', '.');
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if (!RegExp(r'^\d+(\.\d+)?$').hasMatch(value)) return null;
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final parts = value.split('.');
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if (parts.length > 1 && parts[1].length > precision) return null;
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final major = int.tryParse(parts[0]);
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if (major == null || major > 100000000) return null;
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final fraction = parts.length > 1
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? int.parse(parts[1].padRight(precision, '0'))
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: 0;
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return major * scale + fraction;
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}
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int get scale {
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var v = 1;
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for (var i = 0; i < precision; i++) {
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v *= 10;
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}
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return v;
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}
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}
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class TransferRequest {
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const TransferRequest({
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required this.kind,
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required this.source,
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required this.amount,
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this.destination,
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this.recipient = '',
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});
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final TransferKind kind;
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final String source;
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final int amount;
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final String? destination;
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final String recipient;
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}
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class Quote {
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const Quote({
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required this.id,
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required this.request,
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required this.fee,
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required this.debit,
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required this.credit,
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required this.expiresAt,
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required this.rateNumerator,
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required this.rateDenominator,
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});
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final String id;
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final TransferRequest request;
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final int fee, debit, credit, rateNumerator, rateDenominator;
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final DateTime expiresAt;
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}
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class WalletOperation {
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const WalletOperation({
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required this.id,
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required this.quote,
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required this.status,
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required this.createdAt,
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});
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final String id;
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final Quote quote;
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final OperationStatus status;
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final DateTime createdAt;
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}
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class WalletSnapshot {
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WalletSnapshot({
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required List<CurrencyAccount> accounts,
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required List<WalletOperation> operations,
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}) : accounts = List.unmodifiable(accounts),
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operations = List.unmodifiable(operations);
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final List<CurrencyAccount> accounts;
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final List<WalletOperation> operations;
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}
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class AccountProfile {
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const AccountProfile(this.locale);
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final String locale;
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}
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