CWA-169 | created MorphToken exchange provider and MorphToken request (also this provider added to exchange provider description, exchange page, exchange store, router)
Oleksandr Sobol
4 years ago
parent
612b5647fc
commit
c1a7ee0164
@ -0,0 +1,167 @@
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import 'dart:convert';
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import 'package:cake_wallet/src/domain/exchange/trade_not_found_exeption.dart';
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import 'package:flutter/foundation.dart';
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import 'package:http/http.dart';
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import 'package:cake_wallet/src/domain/common/crypto_currency.dart';
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import 'package:cake_wallet/src/domain/exchange/exchange_pair.dart';
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import 'package:cake_wallet/src/domain/exchange/exchange_provider.dart';
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import 'package:cake_wallet/src/domain/exchange/limits.dart';
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import 'package:cake_wallet/src/domain/exchange/trade.dart';
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import 'package:cake_wallet/src/domain/exchange/trade_request.dart';
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import 'package:cake_wallet/src/domain/exchange/trade_state.dart';
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import 'package:cake_wallet/src/domain/exchange/morphtoken/morphtoken_request.dart';
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import 'package:cake_wallet/src/domain/exchange/exchange_provider_description.dart';
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import 'package:cake_wallet/src/domain/exchange/trade_not_created_exeption.dart';
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class MorphTokenExchangeProvider extends ExchangeProvider {
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MorphTokenExchangeProvider()
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: super(
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pairList: CryptoCurrency.all
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.map((i) {
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return CryptoCurrency.all.map((k) {
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if (i == CryptoCurrency.btc && k == CryptoCurrency.xmr) {
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return ExchangePair(from: i, to: k, reverse: false);
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}
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if (i == CryptoCurrency.xmr && k == CryptoCurrency.btc) {
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return null;
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}
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return ExchangePair(from: i, to: k, reverse: true);
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}).where((c) => c != null);
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})
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.expand((i) => i)
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.toList());
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static const apiUri = 'https://api.morphtoken.com';
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static const _morphURISuffix = '/morph';
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static const _limitsURISuffix = '/limits';
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static const _ratesURISuffix = '/rates';
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static const weight = 10000;
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@override
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String get title => 'MorphToken';
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@override
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ExchangeProviderDescription get description =>
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ExchangeProviderDescription.morphToken;
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@override
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Future<Limits> fetchLimits({CryptoCurrency from, CryptoCurrency to}) async {
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final url = apiUri + _limitsURISuffix;
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final headers = {'Content-type': 'application/json'};
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final body =
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json.encode({
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"input": {
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"asset": from.toString()
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},
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"output": [{
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"asset": to.toString(),
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"weight": weight
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}]});
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final response =
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await post(url.toString(), headers: headers, body: json.encode(body));
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final responseJSON = json.decode(response.body) as Map<String, dynamic>;
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final min = responseJSON['input']['limits']['min'] as double;
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final max = responseJSON['input']['limits']['max'] as double;
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return Limits(min: min, max: max);
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}
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@override
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Future<Trade> createTrade({TradeRequest request}) async {
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const url = apiUri + _morphURISuffix;
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final _request = request as MorphTokenRequest;
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final body = {
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"input": {
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"asset": _request.from.toString(),
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"refund": _request.refundAddress
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},
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"output": [{
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"asset": _request.to.toString(),
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"weight": weight,
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"address": _request.address
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}]
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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 (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['description'] 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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}
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final responseJSON = json.decode(response.body) as Map<String, dynamic>;
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final id = responseJSON['id'] as String;
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return Trade(
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id: id,
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provider: description,
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from: _request.from,
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to: _request.to,
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state: TradeState.created,
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amount: _request.amount,
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createdAt: DateTime.now());
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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 + _morphURISuffix + '/' + id;
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final response = await get(url);
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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['description'] 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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}
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final responseJSON = json.decode(response.body) as Map<String, dynamic>;
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final fromCurrency = responseJSON['input']['asset'] as String;
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final from = CryptoCurrency.fromString(fromCurrency);
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final toCurrency = responseJSON['output']['asset'] as String;
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final to = CryptoCurrency.fromString(toCurrency);
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final inputAddress = responseJSON['input']['refund_address'] as String;
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final outputWeight = responseJSON['output']['weight'].toString();
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final status = responseJSON['state'] as String;
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final state = TradeState.deserialize(raw: status);
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final extraId = responseJSON['id'] as String;
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final outputTransaction = responseJSON['deposit_address'] as String;
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return Trade(
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id: id,
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from: from,
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to: to,
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provider: description,
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inputAddress: inputAddress,
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amount: outputWeight,
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state: state,
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extraId: extraId,
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outputTransaction: outputTransaction);
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}
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@override
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Future<double> calculateAmount(
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{CryptoCurrency from, CryptoCurrency to, double amount}) async {
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final url = apiUri + _ratesURISuffix;
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final response = await get(url);
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final responseJSON = json.decode(response.body) as Map<String, dynamic>;
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final rate = responseJSON['data'][from.toString()][to.toString()] as String;
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final estimatedAmount = double.parse(rate) * amount;
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return estimatedAmount;
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}
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}
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@ -0,0 +1,18 @@
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import 'package:flutter/foundation.dart';
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import 'package:cake_wallet/src/domain/common/crypto_currency.dart';
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import 'package:cake_wallet/src/domain/exchange/trade_request.dart';
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class MorphTokenRequest extends TradeRequest {
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MorphTokenRequest(
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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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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 refundAddress;
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}
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