mirror of
https://github.com/cake-tech/cake_wallet.git
synced 2024-12-23 03:59:23 +00:00
Fixed rate for changenow.
This commit is contained in:
parent
860e904816
commit
02de3104eb
5 changed files with 195 additions and 140 deletions
|
@ -16,7 +16,8 @@ import 'package:cake_wallet/exchange/trade_not_created_exeption.dart';
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class ChangeNowExchangeProvider extends ExchangeProvider {
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ChangeNowExchangeProvider()
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: super(
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: _lastUsedRateId = '',
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super(
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pairList: CryptoCurrency.all
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.map((i) => CryptoCurrency.all
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.map((k) => ExchangePair(from: i, to: k, reverse: true))
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@ -24,13 +25,13 @@ class ChangeNowExchangeProvider extends ExchangeProvider {
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.expand((i) => i)
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.toList());
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static const apiUri = 'https://changenow.io/api/v1';
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static const apiKey = secrets.changeNowApiKey;
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static const _exchangeAmountUriSufix = '/exchange-amount/';
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static const _transactionsUriSufix = '/transactions/';
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static const _minAmountUriSufix = '/min-amount/';
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static const _marketInfoUriSufix = '/market-info/';
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static const _fixedRateUriSufix = 'fixed-rate/';
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static const apiAuthority = 'api.changenow.io';
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static const createTradePath = '/v2/exchange';
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static const findTradeByIdPath = '/v2/exchange/by-id';
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static const estimatedAmountPath = '/v2/exchange/estimated-amount';
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static const rangePath = '/v2/exchange/range';
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static const apiHeaderKey = 'x-changenow-api-key';
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@override
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String get title => 'ChangeNOW';
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@ -45,68 +46,74 @@ class ChangeNowExchangeProvider extends ExchangeProvider {
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@override
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Future<bool> checkIsAvailable() async => true;
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String _lastUsedRateId;
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static String getFlow(bool isFixedRate) => isFixedRate ? 'fixed-rate' : 'standard';
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@override
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Future<Limits> fetchLimits({CryptoCurrency from, CryptoCurrency to,
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bool isFixedRateMode}) async {
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final fromTitle = defineCurrencyTitle(from);
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final toTitle = defineCurrencyTitle(to);
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final symbol = fromTitle + '_' + toTitle;
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final url = isFixedRateMode
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? apiUri + _marketInfoUriSufix + _fixedRateUriSufix + apiKey
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: apiUri + _minAmountUriSufix + symbol;
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final response = await get(url);
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final headers = {apiHeaderKey: apiKey};
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final normalizedFrom = normalizeCryptoCurrency(from);
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final normalizedTo = normalizeCryptoCurrency(to);
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final flow = getFlow(isFixedRateMode);
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final params = <String, String>{
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'fromCurrency': normalizedFrom,
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'toCurrency': normalizedTo,
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'flow': flow};
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final uri = Uri.https(apiAuthority, rangePath, params);
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final response = await get(uri, headers: headers);
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if (isFixedRateMode) {
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final responseJSON = json.decode(response.body) as List<dynamic>;
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for (var elem in responseJSON) {
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final elemFrom = elem["from"] as String;
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final elemTo = elem["to"] as String;
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if ((elemFrom == fromTitle) && (elemTo == toTitle)) {
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final min = elem["min"] as double;
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final max = elem["max"] as double;
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return Limits(min: min, max: max);
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}
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}
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return Limits(min: 0, max: 0);
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} else {
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if (response.statusCode == 400) {
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final responseJSON = json.decode(response.body) as Map<String, dynamic>;
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final min = responseJSON['minAmount'] as double;
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return Limits(min: min, max: null);
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final error = responseJSON['error'] as String;
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final message = responseJSON['message'] as String;
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throw Exception('${error}\n$message');
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}
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if (response.statusCode != 200) {
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return null;
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}
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final responseJSON = json.decode(response.body) as Map<String, dynamic>;
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return Limits(
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min: responseJSON['minAmount'] as double,
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max: responseJSON['maxAmount'] as double);
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}
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@override
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Future<Trade> createTrade({TradeRequest request, bool isFixedRateMode}) async {
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final url = isFixedRateMode
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? apiUri + _transactionsUriSufix + _fixedRateUriSufix + apiKey
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: apiUri + _transactionsUriSufix + apiKey;
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final _request = request as ChangeNowRequest;
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final fromTitle = defineCurrencyTitle(_request.from);
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final toTitle = defineCurrencyTitle(_request.to);
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final body = {
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'from': fromTitle,
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'to': toTitle,
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final headers = {
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apiHeaderKey: apiKey,
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'Content-Type': 'application/json'};
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final flow = getFlow(isFixedRateMode);
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final body = <String, String>{
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'fromCurrency': normalizeCryptoCurrency(_request.from),
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'toCurrency': normalizeCryptoCurrency(_request.to),
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'fromAmount': _request.fromAmount,
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'toAmount': _request.toAmount,
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'address': _request.address,
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'amount': _request.amount,
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'flow': flow,
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'refundAddress': _request.refundAddress
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};
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final response = await post(url,
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headers: {'Content-Type': 'application/json'}, body: json.encode(body));
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if (isFixedRateMode) {
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body['rateId'] = _lastUsedRateId;
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}
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final uri = Uri.https(apiAuthority, createTradePath);
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final response = await post(uri, headers: headers, body: json.encode(body));
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if (response.statusCode == 400) {
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final responseJSON = json.decode(response.body) as Map<String, dynamic>;
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final error = responseJSON['error'] as String;
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final message = responseJSON['message'] as String;
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throw Exception('${error}\n$message');
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}
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if (response.statusCode != 200) {
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if (response.statusCode == 400) {
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final responseJSON = json.decode(response.body) as Map<String, dynamic>;
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final error = responseJSON['message'] as String;
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throw TradeNotCreatedException(description, description: error);
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}
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throw TradeNotCreatedException(description);
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return null;
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}
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final responseJSON = json.decode(response.body) as Map<String, dynamic>;
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@ -124,25 +131,31 @@ class ChangeNowExchangeProvider extends ExchangeProvider {
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refundAddress: refundAddress,
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extraId: extraId,
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createdAt: DateTime.now(),
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amount: _request.amount,
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amount: _request.fromAmount,
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state: TradeState.created);
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}
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@override
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Future<Trade> findTradeById({@required String id}) async {
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final url = apiUri + _transactionsUriSufix + id + '/' + apiKey;
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final response = await get(url);
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final headers = {apiHeaderKey: apiKey};
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final params = <String, String>{'id': id};
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final uri = Uri.https(apiAuthority,findTradeByIdPath, params);
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final response = await get(uri, headers: headers);
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if (response.statusCode == 404) {
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throw TradeNotFoundException(id, provider: description);
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}
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if (response.statusCode == 400) {
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final responseJSON = json.decode(response.body) as Map<String, dynamic>;
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final error = responseJSON['message'] as String;
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throw TradeNotFoundException(id,
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provider: description, description: error);
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}
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if (response.statusCode != 200) {
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if (response.statusCode == 400) {
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final responseJSON = json.decode(response.body) as Map<String, dynamic>;
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final error = responseJSON['message'] as String;
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throw TradeNotFoundException(id,
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provider: description, description: error);
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}
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throw TradeNotFoundException(id, provider: description);
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return null;
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}
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final responseJSON = json.decode(response.body) as Map<String, dynamic>;
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@ -151,7 +164,7 @@ class ChangeNowExchangeProvider extends ExchangeProvider {
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final toCurrency = responseJSON['toCurrency'] as String;
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final to = CryptoCurrency.fromString(toCurrency);
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final inputAddress = responseJSON['payinAddress'] as String;
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final expectedSendAmount = responseJSON['expectedSendAmount'].toString();
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final expectedSendAmount = responseJSON['expectedAmountFrom'].toString();
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final status = responseJSON['status'] as String;
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final state = TradeState.deserialize(raw: status);
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final extraId = responseJSON['payinExtraId'] as String;
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@ -181,68 +194,46 @@ class ChangeNowExchangeProvider extends ExchangeProvider {
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double amount,
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bool isFixedRateMode,
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bool isReceiveAmount}) async {
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if (isReceiveAmount && isFixedRateMode) {
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final url = apiUri + _marketInfoUriSufix + _fixedRateUriSufix + apiKey;
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final response = await get(url);
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final responseJSON = json.decode(response.body) as List<dynamic>;
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final fromTitle = defineCurrencyTitle(from);
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final toTitle = defineCurrencyTitle(to);
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var rate = 0.0;
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var fee = 0.0;
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for (var elem in responseJSON) {
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final elemFrom = elem["from"] as String;
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final elemTo = elem["to"] as String;
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if ((elemFrom == toTitle) && (elemTo == fromTitle)) {
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rate = elem["rate"] as double;
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fee = elem["minerFee"] as double;
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break;
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}
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try {
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if (amount == 0) {
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return 0.0;
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}
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final estimatedAmount = (amount == 0.0)||(rate == 0.0) ? 0.0
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: (amount + fee)/rate;
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final headers = {apiHeaderKey: apiKey};
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final isReverse = isReceiveAmount;
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final type = isReverse ? 'reverse' : 'direct';
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final flow = getFlow(isFixedRateMode);
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final params = <String, String>{
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'fromCurrency': isReverse ? normalizeCryptoCurrency(to) : normalizeCryptoCurrency(from),
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'toCurrency': isReverse ? normalizeCryptoCurrency(from) : normalizeCryptoCurrency(to) ,
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'type': type,
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'flow': flow};
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return estimatedAmount;
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} else {
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final url = defineUrlForCalculatingAmount(from, to, amount, isFixedRateMode);
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final response = await get(url);
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if (isReverse) {
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params['toAmount'] = amount.toString();
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} else {
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params['fromAmount'] = amount.toString();
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}
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final uri = Uri.https(apiAuthority, estimatedAmountPath, params);
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final response = await get(uri, headers: headers);
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final responseJSON = json.decode(response.body) as Map<String, dynamic>;
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final estimatedAmount = responseJSON['estimatedAmount'] as double;
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final fromAmount = double.parse(responseJSON['fromAmount'].toString());
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final toAmount = double.parse(responseJSON['toAmount'].toString());
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final rateId = responseJSON['rateId'] as String ?? '';
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return estimatedAmount;
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if (rateId.isNotEmpty) {
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_lastUsedRateId = rateId;
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}
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return isReverse ? fromAmount : toAmount;
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} catch(e) {
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print(e.toString());
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return 0.0;
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}
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}
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static String defineUrlForCalculatingAmount(
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CryptoCurrency from,
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CryptoCurrency to,
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double amount,
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bool isFixedRateMode) {
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final fromTitle = defineCurrencyTitle(from);
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final toTitle = defineCurrencyTitle(to);
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return isFixedRateMode
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? apiUri +
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_exchangeAmountUriSufix +
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_fixedRateUriSufix +
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amount.toString() +
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'/' +
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fromTitle +
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'_' +
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toTitle +
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'?api_key=' + apiKey
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: apiUri +
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_exchangeAmountUriSufix +
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amount.toString() +
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'/' +
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fromTitle +
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'_' +
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toTitle;
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}
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static String defineCurrencyTitle(CryptoCurrency currency) {
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static String normalizeCryptoCurrency(CryptoCurrency currency) {
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const bnbTitle = 'bnbmainnet';
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final currencyTitle = currency == CryptoCurrency.bnb
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? bnbTitle : currency.title.toLowerCase();
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@ -7,12 +7,16 @@ class ChangeNowRequest extends TradeRequest {
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{@required this.from,
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@required this.to,
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@required this.address,
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@required this.amount,
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@required this.refundAddress});
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@required this.fromAmount,
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@required this.toAmount,
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@required this.refundAddress,
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@required this.isReverse});
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CryptoCurrency from;
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CryptoCurrency to;
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String address;
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String amount;
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String fromAmount;
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String toAmount;
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String refundAddress;
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bool isReverse;
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}
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@ -1,5 +1,6 @@
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import 'dart:ui';
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import 'package:cake_wallet/entities/parsed_address.dart';
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import 'package:cake_wallet/utils/debounce.dart';
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import 'package:cw_core/sync_status.dart';
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import 'package:cw_core/wallet_type.dart';
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import 'package:cake_wallet/entities/parse_address_from_domain.dart';
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@ -44,6 +45,8 @@ class ExchangePage extends BasePage {
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final _depositAddressFocus = FocusNode();
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final _receiveAmountFocus = FocusNode();
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final _receiveAddressFocus = FocusNode();
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final _receiveAmountDebounce = Debounce(Duration(milliseconds: 500));
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final _depositAmountDebounce = Debounce(Duration(milliseconds: 500));
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var _isReactionsSet = false;
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@override
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@ -99,6 +102,7 @@ class ExchangePage extends BasePage {
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.addPostFrameCallback((_) => _setReactions(context, exchangeViewModel));
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return KeyboardActions(
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disableScroll: true,
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config: KeyboardActionsConfig(
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keyboardActionsPlatform: KeyboardActionsPlatform.IOS,
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keyboardBarColor:
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@ -113,7 +117,6 @@ class ExchangePage extends BasePage {
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toolbarButtons: [(_) => KeyboardDoneButton()])
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]),
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child: Container(
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height: 1,
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color: Theme.of(context).backgroundColor,
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child: Form(
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key: _formKey,
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@ -314,6 +317,21 @@ class ExchangePage extends BasePage {
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],
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),
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),
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Padding(
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padding: EdgeInsets.only(top: 12, left: 24),
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child: Row(
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mainAxisAlignment: MainAxisAlignment.start,
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children: [
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StandardCheckbox(
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key: checkBoxKey,
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value: exchangeViewModel.isFixedRateMode,
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caption: S.of(context).fixed_rate,
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onChanged: (value) =>
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exchangeViewModel.isFixedRateMode = value,
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),
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],
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)
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),
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Padding(
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padding: EdgeInsets.only(top: 30, left: 24, bottom: 24),
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child: Row(
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@ -548,7 +566,9 @@ class ExchangePage extends BasePage {
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final max = limitsState.limits.max != null
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? limitsState.limits.max.toString()
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: null;
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final key = depositKey;
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final key = exchangeViewModel.isFixedRateMode
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? receiveKey
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: depositKey;
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key.currentState.changeLimits(min: min, max: max);
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}
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@ -656,8 +676,13 @@ class ExchangePage extends BasePage {
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max = '...';
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}
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depositKey.currentState.changeLimits(min: min, max: max);
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receiveKey.currentState.changeLimits(min: null, max: null);
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if (exchangeViewModel.isFixedRateMode) {
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depositKey.currentState.changeLimits(min: null, max: null);
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receiveKey.currentState.changeLimits(min: min, max: max);
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} else {
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depositKey.currentState.changeLimits(min: min, max: max);
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receiveKey.currentState.changeLimits(min: null, max: null);
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}
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});
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depositAddressController.addListener(
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@ -665,9 +690,11 @@ class ExchangePage extends BasePage {
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depositAmountController.addListener(() {
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if (depositAmountController.text != exchangeViewModel.depositAmount) {
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exchangeViewModel.changeDepositAmount(
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amount: depositAmountController.text);
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exchangeViewModel.isReceiveAmountEntered = false;
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_depositAmountDebounce.run(() {
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exchangeViewModel.changeDepositAmount(
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amount: depositAmountController.text);
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exchangeViewModel.isReceiveAmountEntered = false;
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});
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}
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});
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@ -676,9 +703,11 @@ class ExchangePage extends BasePage {
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receiveAmountController.addListener(() {
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if (receiveAmountController.text != exchangeViewModel.receiveAmount) {
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exchangeViewModel.changeReceiveAmount(
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amount: receiveAmountController.text);
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exchangeViewModel.isReceiveAmountEntered = true;
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_receiveAmountDebounce.run(() {
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exchangeViewModel.changeReceiveAmount(
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amount: receiveAmountController.text);
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exchangeViewModel.isReceiveAmountEntered = true;
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});
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}
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});
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|
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14
lib/utils/debounce.dart
Normal file
14
lib/utils/debounce.dart
Normal file
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@ -0,0 +1,14 @@
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import 'dart:async';
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import 'package:flutter/foundation.dart';
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class Debounce {
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Debounce(this.duration);
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final Duration duration;
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Timer _timer;
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void run(VoidCallback action) {
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_timer?.cancel();
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_timer = Timer(duration, action);
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}
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}
|
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@ -57,10 +57,14 @@ abstract class ExchangeViewModelBase with Store {
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receiveCurrencies = CryptoCurrency.all
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.where((cryptoCurrency) => !excludeCurrencies.contains(cryptoCurrency))
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.toList();
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_defineIsReceiveAmountEditable();
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isReverse = false;
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isFixedRateMode = false;
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isReceiveAmountEntered = false;
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_defineIsReceiveAmountEditable();
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loadLimits();
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reaction(
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(_) => isFixedRateMode,
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(Object _) => _defineIsReceiveAmountEditable());
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}
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final WalletBase wallet;
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||||
|
@ -129,6 +133,8 @@ abstract class ExchangeViewModelBase with Store {
|
|||
|
||||
Limits limits;
|
||||
|
||||
bool isReverse;
|
||||
|
||||
NumberFormat _cryptoNumberFormat;
|
||||
|
||||
SettingsStore _settingsStore;
|
||||
|
@ -164,6 +170,7 @@ abstract class ExchangeViewModelBase with Store {
|
|||
@action
|
||||
void changeReceiveAmount({String amount}) {
|
||||
receiveAmount = amount;
|
||||
isReverse = true;
|
||||
|
||||
if (amount == null || amount.isEmpty) {
|
||||
depositAmount = '';
|
||||
|
@ -190,6 +197,7 @@ abstract class ExchangeViewModelBase with Store {
|
|||
@action
|
||||
void changeDepositAmount({String amount}) {
|
||||
depositAmount = amount;
|
||||
isReverse = false;
|
||||
|
||||
if (amount == null || amount.isEmpty) {
|
||||
depositAmount = '';
|
||||
|
@ -217,9 +225,15 @@ abstract class ExchangeViewModelBase with Store {
|
|||
limitsState = LimitsIsLoading();
|
||||
|
||||
try {
|
||||
final from = isFixedRateMode
|
||||
? receiveCurrency
|
||||
: depositCurrency;
|
||||
final to = isFixedRateMode
|
||||
? depositCurrency
|
||||
: receiveCurrency;
|
||||
limits = await provider.fetchLimits(
|
||||
from: depositCurrency,
|
||||
to: receiveCurrency,
|
||||
from: from,
|
||||
to: to,
|
||||
isFixedRateMode: isFixedRateMode);
|
||||
limitsState = LimitsLoadedSuccessfully(limits: limits);
|
||||
} catch (e) {
|
||||
|
@ -250,10 +264,12 @@ abstract class ExchangeViewModelBase with Store {
|
|||
request = ChangeNowRequest(
|
||||
from: depositCurrency,
|
||||
to: receiveCurrency,
|
||||
amount: depositAmount?.replaceAll(',', '.'),
|
||||
fromAmount: depositAmount?.replaceAll(',', '.'),
|
||||
toAmount: receiveAmount?.replaceAll(',', '.'),
|
||||
refundAddress: depositAddress,
|
||||
address: receiveAddress);
|
||||
amount = depositAmount;
|
||||
address: receiveAddress,
|
||||
isReverse: isReverse);
|
||||
amount = isReverse ? receiveAmount : depositAmount;
|
||||
currency = depositCurrency;
|
||||
}
|
||||
|
||||
|
@ -422,6 +438,7 @@ abstract class ExchangeViewModelBase with Store {
|
|||
} else {
|
||||
isReceiveAmountEditable = false;
|
||||
}*/
|
||||
isReceiveAmountEditable = false;
|
||||
//isReceiveAmountEditable = false;
|
||||
isReceiveAmountEditable = (isFixedRateMode ?? false) && provider is ChangeNowExchangeProvider;
|
||||
}
|
||||
}
|
||||
|
|
Loading…
Reference in a new issue