alphaswap-sdk
Version:
🛠An SDK for building applications on top of Uniswap on KCC.
1,306 lines (1,057 loc) • 60.7 kB
JavaScript
'use strict';
Object.defineProperty(exports, '__esModule', { value: true });
function _interopDefault (ex) { return (ex && (typeof ex === 'object') && 'default' in ex) ? ex['default'] : ex; }
var JSBI = _interopDefault(require('jsbi'));
var invariant = _interopDefault(require('tiny-invariant'));
var warning = _interopDefault(require('tiny-warning'));
var address = require('@ethersproject/address');
var _Big = _interopDefault(require('big.js'));
var toFormat = _interopDefault(require('toformat'));
var _Decimal = _interopDefault(require('decimal.js-light'));
var solidity = require('@ethersproject/solidity');
var contracts = require('@ethersproject/contracts');
var networks = require('@ethersproject/networks');
var providers = require('@ethersproject/providers');
var IUniswapV2Pair = _interopDefault(require('@uniswap/v2-core/build/IUniswapV2Pair.json'));
var WETH = "0x4446Fc4eb47f2f6586f9fAAb68B3498F86C07521";
var factory = "0x87383F77AddEB3cEaD7A78009AfcCF53C9F5bfCf";
var _FACTORY_ADDRESS, _SOLIDITY_TYPE_MAXIMA;
(function (ChainId) {
ChainId[ChainId["MAINNET"] = 1] = "MAINNET";
ChainId[ChainId["STANDALONE"] = 321] = "STANDALONE";
ChainId[ChainId["MOONROCK"] = 1286] = "MOONROCK";
ChainId[ChainId["MOONBASE"] = 1287] = "MOONBASE";
ChainId[ChainId["MOONSHADOW"] = 1288] = "MOONSHADOW";
})(exports.ChainId || (exports.ChainId = {}));
(function (TradeType) {
TradeType[TradeType["EXACT_INPUT"] = 0] = "EXACT_INPUT";
TradeType[TradeType["EXACT_OUTPUT"] = 1] = "EXACT_OUTPUT";
})(exports.TradeType || (exports.TradeType = {}));
(function (Rounding) {
Rounding[Rounding["ROUND_DOWN"] = 0] = "ROUND_DOWN";
Rounding[Rounding["ROUND_HALF_UP"] = 1] = "ROUND_HALF_UP";
Rounding[Rounding["ROUND_UP"] = 2] = "ROUND_UP";
})(exports.Rounding || (exports.Rounding = {}));
var FACTORY_ADDRESS = (_FACTORY_ADDRESS = {}, _FACTORY_ADDRESS[exports.ChainId.STANDALONE] = '0x87383F77AddEB3cEaD7A78009AfcCF53C9F5bfCf', _FACTORY_ADDRESS[exports.ChainId.MOONROCK] = factory, _FACTORY_ADDRESS[exports.ChainId.MOONBASE] = factory, _FACTORY_ADDRESS[exports.ChainId.MOONSHADOW] = factory, _FACTORY_ADDRESS);
var INIT_CODE_HASH = '0x6a27825fe190285cc8973e4e623d564e52119b3a2186b8280bd7715671ae47ba';
var MINIMUM_LIQUIDITY = /*#__PURE__*/JSBI.BigInt(1000); // exports for internal consumption
var ZERO = /*#__PURE__*/JSBI.BigInt(0);
var ONE = /*#__PURE__*/JSBI.BigInt(1);
var TWO = /*#__PURE__*/JSBI.BigInt(2);
var THREE = /*#__PURE__*/JSBI.BigInt(3);
var FIVE = /*#__PURE__*/JSBI.BigInt(5);
var TEN = /*#__PURE__*/JSBI.BigInt(10);
var _100 = /*#__PURE__*/JSBI.BigInt(100);
var _997 = /*#__PURE__*/JSBI.BigInt(997);
var _1000 = /*#__PURE__*/JSBI.BigInt(1000);
var SolidityType;
(function (SolidityType) {
SolidityType["uint8"] = "uint8";
SolidityType["uint256"] = "uint256";
})(SolidityType || (SolidityType = {}));
var SOLIDITY_TYPE_MAXIMA = (_SOLIDITY_TYPE_MAXIMA = {}, _SOLIDITY_TYPE_MAXIMA[SolidityType.uint8] = /*#__PURE__*/JSBI.BigInt('0xff'), _SOLIDITY_TYPE_MAXIMA[SolidityType.uint256] = /*#__PURE__*/JSBI.BigInt('0xffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffff'), _SOLIDITY_TYPE_MAXIMA);
function _defineProperties(target, props) {
for (var i = 0; i < props.length; i++) {
var descriptor = props[i];
descriptor.enumerable = descriptor.enumerable || false;
descriptor.configurable = true;
if ("value" in descriptor) descriptor.writable = true;
Object.defineProperty(target, descriptor.key, descriptor);
}
}
function _createClass(Constructor, protoProps, staticProps) {
if (protoProps) _defineProperties(Constructor.prototype, protoProps);
if (staticProps) _defineProperties(Constructor, staticProps);
Object.defineProperty(Constructor, "prototype", {
writable: false
});
return Constructor;
}
function _extends() {
_extends = Object.assign || function (target) {
for (var i = 1; i < arguments.length; i++) {
var source = arguments[i];
for (var key in source) {
if (Object.prototype.hasOwnProperty.call(source, key)) {
target[key] = source[key];
}
}
}
return target;
};
return _extends.apply(this, arguments);
}
function _inheritsLoose(subClass, superClass) {
subClass.prototype = Object.create(superClass.prototype);
subClass.prototype.constructor = subClass;
_setPrototypeOf(subClass, superClass);
}
function _getPrototypeOf(o) {
_getPrototypeOf = Object.setPrototypeOf ? Object.getPrototypeOf : function _getPrototypeOf(o) {
return o.__proto__ || Object.getPrototypeOf(o);
};
return _getPrototypeOf(o);
}
function _setPrototypeOf(o, p) {
_setPrototypeOf = Object.setPrototypeOf || function _setPrototypeOf(o, p) {
o.__proto__ = p;
return o;
};
return _setPrototypeOf(o, p);
}
function _isNativeReflectConstruct() {
if (typeof Reflect === "undefined" || !Reflect.construct) return false;
if (Reflect.construct.sham) return false;
if (typeof Proxy === "function") return true;
try {
Boolean.prototype.valueOf.call(Reflect.construct(Boolean, [], function () {}));
return true;
} catch (e) {
return false;
}
}
function _construct(Parent, args, Class) {
if (_isNativeReflectConstruct()) {
_construct = Reflect.construct;
} else {
_construct = function _construct(Parent, args, Class) {
var a = [null];
a.push.apply(a, args);
var Constructor = Function.bind.apply(Parent, a);
var instance = new Constructor();
if (Class) _setPrototypeOf(instance, Class.prototype);
return instance;
};
}
return _construct.apply(null, arguments);
}
function _isNativeFunction(fn) {
return Function.toString.call(fn).indexOf("[native code]") !== -1;
}
function _wrapNativeSuper(Class) {
var _cache = typeof Map === "function" ? new Map() : undefined;
_wrapNativeSuper = function _wrapNativeSuper(Class) {
if (Class === null || !_isNativeFunction(Class)) return Class;
if (typeof Class !== "function") {
throw new TypeError("Super expression must either be null or a function");
}
if (typeof _cache !== "undefined") {
if (_cache.has(Class)) return _cache.get(Class);
_cache.set(Class, Wrapper);
}
function Wrapper() {
return _construct(Class, arguments, _getPrototypeOf(this).constructor);
}
Wrapper.prototype = Object.create(Class.prototype, {
constructor: {
value: Wrapper,
enumerable: false,
writable: true,
configurable: true
}
});
return _setPrototypeOf(Wrapper, Class);
};
return _wrapNativeSuper(Class);
}
function _assertThisInitialized(self) {
if (self === void 0) {
throw new ReferenceError("this hasn't been initialised - super() hasn't been called");
}
return self;
}
function _unsupportedIterableToArray(o, minLen) {
if (!o) return;
if (typeof o === "string") return _arrayLikeToArray(o, minLen);
var n = Object.prototype.toString.call(o).slice(8, -1);
if (n === "Object" && o.constructor) n = o.constructor.name;
if (n === "Map" || n === "Set") return Array.from(o);
if (n === "Arguments" || /^(?:Ui|I)nt(?:8|16|32)(?:Clamped)?Array$/.test(n)) return _arrayLikeToArray(o, minLen);
}
function _arrayLikeToArray(arr, len) {
if (len == null || len > arr.length) len = arr.length;
for (var i = 0, arr2 = new Array(len); i < len; i++) arr2[i] = arr[i];
return arr2;
}
function _createForOfIteratorHelperLoose(o, allowArrayLike) {
var it = typeof Symbol !== "undefined" && o[Symbol.iterator] || o["@@iterator"];
if (it) return (it = it.call(o)).next.bind(it);
if (Array.isArray(o) || (it = _unsupportedIterableToArray(o)) || allowArrayLike && o && typeof o.length === "number") {
if (it) o = it;
var i = 0;
return function () {
if (i >= o.length) return {
done: true
};
return {
done: false,
value: o[i++]
};
};
}
throw new TypeError("Invalid attempt to iterate non-iterable instance.\nIn order to be iterable, non-array objects must have a [Symbol.iterator]() method.");
}
// see https://stackoverflow.com/a/41102306
var CAN_SET_PROTOTYPE = ('setPrototypeOf' in Object);
/**
* Indicates that the pair has insufficient reserves for a desired output amount. I.e. the amount of output cannot be
* obtained by sending any amount of input.
*/
var InsufficientReservesError = /*#__PURE__*/function (_Error) {
_inheritsLoose(InsufficientReservesError, _Error);
function InsufficientReservesError() {
var _this;
_this = _Error.call(this) || this;
_this.isInsufficientReservesError = true;
_this.name = _this.constructor.name;
if (CAN_SET_PROTOTYPE) Object.setPrototypeOf(_assertThisInitialized(_this), (this instanceof InsufficientReservesError ? this.constructor : void 0).prototype);
return _this;
}
return InsufficientReservesError;
}( /*#__PURE__*/_wrapNativeSuper(Error));
/**
* Indicates that the input amount is too small to produce any amount of output. I.e. the amount of input sent is less
* than the price of a single unit of output after fees.
*/
var InsufficientInputAmountError = /*#__PURE__*/function (_Error2) {
_inheritsLoose(InsufficientInputAmountError, _Error2);
function InsufficientInputAmountError() {
var _this2;
_this2 = _Error2.call(this) || this;
_this2.isInsufficientInputAmountError = true;
_this2.name = _this2.constructor.name;
if (CAN_SET_PROTOTYPE) Object.setPrototypeOf(_assertThisInitialized(_this2), (this instanceof InsufficientInputAmountError ? this.constructor : void 0).prototype);
return _this2;
}
return InsufficientInputAmountError;
}( /*#__PURE__*/_wrapNativeSuper(Error));
function validateSolidityTypeInstance(value, solidityType) {
!JSBI.greaterThanOrEqual(value, ZERO) ? invariant(false, value + " is not a " + solidityType + ".") : void 0;
!JSBI.lessThanOrEqual(value, SOLIDITY_TYPE_MAXIMA[solidityType]) ? invariant(false, value + " is not a " + solidityType + ".") : void 0;
} // warns if addresses are not checksummed
function validateAndParseAddress(address$1) {
try {
var checksummedAddress = address.getAddress(address$1);
"development" !== "production" ? warning(address$1 === checksummedAddress, address$1 + " is not checksummed.") : void 0;
return checksummedAddress;
} catch (error) {
invariant(false, address$1 + " is not a valid address.") ;
}
}
function parseBigintIsh(bigintIsh) {
return bigintIsh instanceof JSBI ? bigintIsh : typeof bigintIsh === 'bigint' ? JSBI.BigInt(bigintIsh.toString()) : JSBI.BigInt(bigintIsh);
} // mock the on-chain sqrt function
function sqrt(y) {
validateSolidityTypeInstance(y, SolidityType.uint256);
var z = ZERO;
var x;
if (JSBI.greaterThan(y, THREE)) {
z = y;
x = JSBI.add(JSBI.divide(y, TWO), ONE);
while (JSBI.lessThan(x, z)) {
z = x;
x = JSBI.divide(JSBI.add(JSBI.divide(y, x), x), TWO);
}
} else if (JSBI.notEqual(y, ZERO)) {
z = ONE;
}
return z;
} // given an array of items sorted by `comparator`, insert an item into its sort index and constrain the size to
// `maxSize` by removing the last item
function sortedInsert(items, add, maxSize, comparator) {
!(maxSize > 0) ? invariant(false, 'MAX_SIZE_ZERO') : void 0; // this is an invariant because the interface cannot return multiple removed items if items.length exceeds maxSize
!(items.length <= maxSize) ? invariant(false, 'ITEMS_SIZE') : void 0; // short circuit first item add
if (items.length === 0) {
items.push(add);
return null;
} else {
var isFull = items.length === maxSize; // short circuit if full and the additional item does not come before the last item
if (isFull && comparator(items[items.length - 1], add) <= 0) {
return add;
}
var lo = 0,
hi = items.length;
while (lo < hi) {
var mid = lo + hi >>> 1;
if (comparator(items[mid], add) <= 0) {
lo = mid + 1;
} else {
hi = mid;
}
}
items.splice(lo, 0, add);
return isFull ? items.pop() : null;
}
}
/**
* A currency is any fungible financial instrument on Ethereum, including Ether and all ERC20 tokens.
*
* The only instance of the base class `Currency` is Ether.
*/
var Currency =
/**
* Constructs an instance of the base class `Currency`. The only instance of the base class `Currency` is `Currency.ETHER`.
* @param decimals decimals of the currency
* @param symbol symbol of the currency
* @param name of the currency
*/
function Currency(decimals, symbol, name) {
validateSolidityTypeInstance(JSBI.BigInt(decimals), SolidityType.uint8);
this.decimals = decimals;
this.symbol = symbol;
this.name = name;
};
/**
* The only instance of the base class `Currency`.
*/
Currency.DEV = /*#__PURE__*/new Currency(18, 'KCS', 'KCS');
var DEV = Currency.DEV;
var _WDEV;
/**
* Represents an ERC20 token with a unique address and some metadata.
*/
var Token = /*#__PURE__*/function (_Currency) {
_inheritsLoose(Token, _Currency);
function Token(chainId, address, decimals, symbol, name) {
var _this;
_this = _Currency.call(this, decimals, symbol, name) || this;
_this.chainId = chainId;
_this.address = validateAndParseAddress(address);
return _this;
}
/**
* Returns true if the two tokens are equivalent, i.e. have the same chainId and address.
* @param other other token to compare
*/
var _proto = Token.prototype;
_proto.equals = function equals(other) {
// short circuit on reference equality
if (this === other) {
return true;
}
return this.chainId === other.chainId && this.address === other.address;
}
/**
* Returns true if the address of this token sorts before the address of the other token
* @param other other token to compare
* @throws if the tokens have the same address
* @throws if the tokens are on different chains
*/
;
_proto.sortsBefore = function sortsBefore(other) {
!(this.chainId === other.chainId) ? invariant(false, 'CHAIN_IDS') : void 0;
!(this.address !== other.address) ? invariant(false, 'ADDRESSES') : void 0;
return this.address.toLowerCase() < other.address.toLowerCase();
};
return Token;
}(Currency);
/**
* Compares two currencies for equality
*/
function currencyEquals(currencyA, currencyB) {
if (currencyA instanceof Token && currencyB instanceof Token) {
return currencyA.equals(currencyB);
} else if (currencyA instanceof Token) {
return false;
} else if (currencyB instanceof Token) {
return false;
} else {
return currencyA === currencyB;
}
}
var WDEV = (_WDEV = {}, _WDEV[exports.ChainId.MAINNET] = /*#__PURE__*/new Token(exports.ChainId.MAINNET, '0x4446Fc4eb47f2f6586f9fAAb68B3498F86C07521', 18, 'WKCE', 'Wrapped KCS'), _WDEV[exports.ChainId.STANDALONE] = /*#__PURE__*/new Token(exports.ChainId.STANDALONE, '0x4446Fc4eb47f2f6586f9fAAb68B3498F86C07521', 18, 'WKCS', 'Wrapped KCS'), _WDEV[exports.ChainId.MOONROCK] = /*#__PURE__*/new Token(exports.ChainId.MOONROCK, WETH, 18, 'WKCS', 'Wrapped KCS'), _WDEV[exports.ChainId.MOONBASE] = /*#__PURE__*/new Token(exports.ChainId.MOONBASE, WETH, 18, 'WKCS', 'Wrapped KCS'), _WDEV[exports.ChainId.MOONSHADOW] = /*#__PURE__*/new Token(exports.ChainId.MOONSHADOW, WETH, 18, 'WKCS', 'Wrapped KCS'), _WDEV);
var _toSignificantRoundin, _toFixedRounding;
var Decimal = /*#__PURE__*/toFormat(_Decimal);
var Big = /*#__PURE__*/toFormat(_Big);
var toSignificantRounding = (_toSignificantRoundin = {}, _toSignificantRoundin[exports.Rounding.ROUND_DOWN] = Decimal.ROUND_DOWN, _toSignificantRoundin[exports.Rounding.ROUND_HALF_UP] = Decimal.ROUND_HALF_UP, _toSignificantRoundin[exports.Rounding.ROUND_UP] = Decimal.ROUND_UP, _toSignificantRoundin);
var toFixedRounding = (_toFixedRounding = {}, _toFixedRounding[exports.Rounding.ROUND_DOWN] = 0, _toFixedRounding[exports.Rounding.ROUND_HALF_UP] = 1, _toFixedRounding[exports.Rounding.ROUND_UP] = 3, _toFixedRounding);
var Fraction = /*#__PURE__*/function () {
function Fraction(numerator, denominator) {
if (denominator === void 0) {
denominator = ONE;
}
this.numerator = parseBigintIsh(numerator);
this.denominator = parseBigintIsh(denominator);
} // performs floor division
var _proto = Fraction.prototype;
_proto.invert = function invert() {
return new Fraction(this.denominator, this.numerator);
};
_proto.add = function add(other) {
var otherParsed = other instanceof Fraction ? other : new Fraction(parseBigintIsh(other));
if (JSBI.equal(this.denominator, otherParsed.denominator)) {
return new Fraction(JSBI.add(this.numerator, otherParsed.numerator), this.denominator);
}
return new Fraction(JSBI.add(JSBI.multiply(this.numerator, otherParsed.denominator), JSBI.multiply(otherParsed.numerator, this.denominator)), JSBI.multiply(this.denominator, otherParsed.denominator));
};
_proto.subtract = function subtract(other) {
var otherParsed = other instanceof Fraction ? other : new Fraction(parseBigintIsh(other));
if (JSBI.equal(this.denominator, otherParsed.denominator)) {
return new Fraction(JSBI.subtract(this.numerator, otherParsed.numerator), this.denominator);
}
return new Fraction(JSBI.subtract(JSBI.multiply(this.numerator, otherParsed.denominator), JSBI.multiply(otherParsed.numerator, this.denominator)), JSBI.multiply(this.denominator, otherParsed.denominator));
};
_proto.lessThan = function lessThan(other) {
var otherParsed = other instanceof Fraction ? other : new Fraction(parseBigintIsh(other));
return JSBI.lessThan(JSBI.multiply(this.numerator, otherParsed.denominator), JSBI.multiply(otherParsed.numerator, this.denominator));
};
_proto.equalTo = function equalTo(other) {
var otherParsed = other instanceof Fraction ? other : new Fraction(parseBigintIsh(other));
return JSBI.equal(JSBI.multiply(this.numerator, otherParsed.denominator), JSBI.multiply(otherParsed.numerator, this.denominator));
};
_proto.greaterThan = function greaterThan(other) {
var otherParsed = other instanceof Fraction ? other : new Fraction(parseBigintIsh(other));
return JSBI.greaterThan(JSBI.multiply(this.numerator, otherParsed.denominator), JSBI.multiply(otherParsed.numerator, this.denominator));
};
_proto.multiply = function multiply(other) {
var otherParsed = other instanceof Fraction ? other : new Fraction(parseBigintIsh(other));
return new Fraction(JSBI.multiply(this.numerator, otherParsed.numerator), JSBI.multiply(this.denominator, otherParsed.denominator));
};
_proto.divide = function divide(other) {
var otherParsed = other instanceof Fraction ? other : new Fraction(parseBigintIsh(other));
return new Fraction(JSBI.multiply(this.numerator, otherParsed.denominator), JSBI.multiply(this.denominator, otherParsed.numerator));
};
_proto.toSignificant = function toSignificant(significantDigits, format, rounding) {
if (format === void 0) {
format = {
groupSeparator: ''
};
}
if (rounding === void 0) {
rounding = exports.Rounding.ROUND_HALF_UP;
}
!Number.isInteger(significantDigits) ? invariant(false, significantDigits + " is not an integer.") : void 0;
!(significantDigits > 0) ? invariant(false, significantDigits + " is not positive.") : void 0;
Decimal.set({
precision: significantDigits + 1,
rounding: toSignificantRounding[rounding]
});
var quotient = new Decimal(this.numerator.toString()).div(this.denominator.toString()).toSignificantDigits(significantDigits);
return quotient.toFormat(quotient.decimalPlaces(), format);
};
_proto.toFixed = function toFixed(decimalPlaces, format, rounding) {
if (format === void 0) {
format = {
groupSeparator: ''
};
}
if (rounding === void 0) {
rounding = exports.Rounding.ROUND_HALF_UP;
}
!Number.isInteger(decimalPlaces) ? invariant(false, decimalPlaces + " is not an integer.") : void 0;
!(decimalPlaces >= 0) ? invariant(false, decimalPlaces + " is negative.") : void 0;
Big.DP = decimalPlaces;
Big.RM = toFixedRounding[rounding];
return new Big(this.numerator.toString()).div(this.denominator.toString()).toFormat(decimalPlaces, format);
};
_createClass(Fraction, [{
key: "quotient",
get: function get() {
return JSBI.divide(this.numerator, this.denominator);
} // remainder after floor division
}, {
key: "remainder",
get: function get() {
return new Fraction(JSBI.remainder(this.numerator, this.denominator), this.denominator);
}
}]);
return Fraction;
}();
var Big$1 = /*#__PURE__*/toFormat(_Big);
var CurrencyAmount = /*#__PURE__*/function (_Fraction) {
_inheritsLoose(CurrencyAmount, _Fraction);
// amount _must_ be raw, i.e. in the native representation
function CurrencyAmount(currency, amount) {
var _this;
var parsedAmount = parseBigintIsh(amount);
validateSolidityTypeInstance(parsedAmount, SolidityType.uint256);
_this = _Fraction.call(this, parsedAmount, JSBI.exponentiate(TEN, JSBI.BigInt(currency.decimals))) || this;
_this.currency = currency;
return _this;
}
/**
* Helper that calls the constructor with the DEV currency
* @param amount ether amount in wei
*/
CurrencyAmount.ether = function ether(amount) {
return new CurrencyAmount(DEV, amount);
};
var _proto = CurrencyAmount.prototype;
_proto.add = function add(other) {
!currencyEquals(this.currency, other.currency) ? invariant(false, 'TOKEN') : void 0;
return new CurrencyAmount(this.currency, JSBI.add(this.raw, other.raw));
};
_proto.subtract = function subtract(other) {
!currencyEquals(this.currency, other.currency) ? invariant(false, 'TOKEN') : void 0;
return new CurrencyAmount(this.currency, JSBI.subtract(this.raw, other.raw));
};
_proto.toSignificant = function toSignificant(significantDigits, format, rounding) {
if (significantDigits === void 0) {
significantDigits = 6;
}
if (rounding === void 0) {
rounding = exports.Rounding.ROUND_DOWN;
}
return _Fraction.prototype.toSignificant.call(this, significantDigits, format, rounding);
};
_proto.toFixed = function toFixed(decimalPlaces, format, rounding) {
if (decimalPlaces === void 0) {
decimalPlaces = this.currency.decimals;
}
if (rounding === void 0) {
rounding = exports.Rounding.ROUND_DOWN;
}
!(decimalPlaces <= this.currency.decimals) ? invariant(false, 'DECIMALS') : void 0;
return _Fraction.prototype.toFixed.call(this, decimalPlaces, format, rounding);
};
_proto.toExact = function toExact(format) {
if (format === void 0) {
format = {
groupSeparator: ''
};
}
Big$1.DP = this.currency.decimals;
return new Big$1(this.numerator.toString()).div(this.denominator.toString()).toFormat(format);
};
_createClass(CurrencyAmount, [{
key: "raw",
get: function get() {
return this.numerator;
}
}]);
return CurrencyAmount;
}(Fraction);
var TokenAmount = /*#__PURE__*/function (_CurrencyAmount) {
_inheritsLoose(TokenAmount, _CurrencyAmount);
// amount _must_ be raw, i.e. in the native representation
function TokenAmount(token, amount) {
var _this;
_this = _CurrencyAmount.call(this, token, amount) || this;
_this.token = token;
return _this;
}
var _proto = TokenAmount.prototype;
_proto.add = function add(other) {
!this.token.equals(other.token) ? invariant(false, 'TOKEN') : void 0;
return new TokenAmount(this.token, JSBI.add(this.raw, other.raw));
};
_proto.subtract = function subtract(other) {
!this.token.equals(other.token) ? invariant(false, 'TOKEN') : void 0;
return new TokenAmount(this.token, JSBI.subtract(this.raw, other.raw));
};
return TokenAmount;
}(CurrencyAmount);
var Price = /*#__PURE__*/function (_Fraction) {
_inheritsLoose(Price, _Fraction);
// denominator and numerator _must_ be raw, i.e. in the native representation
function Price(baseCurrency, quoteCurrency, denominator, numerator) {
var _this;
_this = _Fraction.call(this, numerator, denominator) || this;
_this.baseCurrency = baseCurrency;
_this.quoteCurrency = quoteCurrency;
_this.scalar = new Fraction(JSBI.exponentiate(TEN, JSBI.BigInt(baseCurrency.decimals)), JSBI.exponentiate(TEN, JSBI.BigInt(quoteCurrency.decimals)));
return _this;
}
Price.fromRoute = function fromRoute(route) {
var prices = [];
for (var _iterator = _createForOfIteratorHelperLoose(route.pairs.entries()), _step; !(_step = _iterator()).done;) {
var _step$value = _step.value,
i = _step$value[0],
pair = _step$value[1];
prices.push(route.path[i].equals(pair.token0) ? new Price(pair.reserve0.currency, pair.reserve1.currency, pair.reserve0.raw, pair.reserve1.raw) : new Price(pair.reserve1.currency, pair.reserve0.currency, pair.reserve1.raw, pair.reserve0.raw));
}
return prices.slice(1).reduce(function (accumulator, currentValue) {
return accumulator.multiply(currentValue);
}, prices[0]);
};
var _proto = Price.prototype;
_proto.invert = function invert() {
return new Price(this.quoteCurrency, this.baseCurrency, this.numerator, this.denominator);
};
_proto.multiply = function multiply(other) {
!currencyEquals(this.quoteCurrency, other.baseCurrency) ? invariant(false, 'TOKEN') : void 0;
var fraction = _Fraction.prototype.multiply.call(this, other);
return new Price(this.baseCurrency, other.quoteCurrency, fraction.denominator, fraction.numerator);
} // performs floor division on overflow
;
_proto.quote = function quote(currencyAmount) {
!currencyEquals(currencyAmount.currency, this.baseCurrency) ? invariant(false, 'TOKEN') : void 0;
if (this.quoteCurrency instanceof Token) {
return new TokenAmount(this.quoteCurrency, _Fraction.prototype.multiply.call(this, currencyAmount.raw).quotient);
}
return CurrencyAmount.ether(_Fraction.prototype.multiply.call(this, currencyAmount.raw).quotient);
};
_proto.toSignificant = function toSignificant(significantDigits, format, rounding) {
if (significantDigits === void 0) {
significantDigits = 6;
}
return this.adjusted.toSignificant(significantDigits, format, rounding);
};
_proto.toFixed = function toFixed(decimalPlaces, format, rounding) {
if (decimalPlaces === void 0) {
decimalPlaces = 4;
}
return this.adjusted.toFixed(decimalPlaces, format, rounding);
};
_createClass(Price, [{
key: "raw",
get: function get() {
return new Fraction(this.numerator, this.denominator);
}
}, {
key: "adjusted",
get: function get() {
return _Fraction.prototype.multiply.call(this, this.scalar);
}
}]);
return Price;
}(Fraction);
var PAIR_ADDRESS_CACHE = {};
var Pair = /*#__PURE__*/function () {
function Pair(tokenAmountA, tokenAmountB) {
var tokenAmounts = tokenAmountA.token.sortsBefore(tokenAmountB.token) // does safety checks
? [tokenAmountA, tokenAmountB] : [tokenAmountB, tokenAmountA];
this.liquidityToken = new Token(tokenAmounts[0].token.chainId, Pair.getAddress(tokenAmounts[0].token, tokenAmounts[1].token), 18, 'UNI-V2', 'Uniswap V2');
this.tokenAmounts = tokenAmounts;
}
Pair.getAddress = function getAddress(tokenA, tokenB) {
var _PAIR_ADDRESS_CACHE, _PAIR_ADDRESS_CACHE$t;
var tokens = tokenA.sortsBefore(tokenB) ? [tokenA, tokenB] : [tokenB, tokenA]; // does safety checks
if (((_PAIR_ADDRESS_CACHE = PAIR_ADDRESS_CACHE) === null || _PAIR_ADDRESS_CACHE === void 0 ? void 0 : (_PAIR_ADDRESS_CACHE$t = _PAIR_ADDRESS_CACHE[tokens[0].address]) === null || _PAIR_ADDRESS_CACHE$t === void 0 ? void 0 : _PAIR_ADDRESS_CACHE$t[tokens[1].address]) === undefined) {
var _PAIR_ADDRESS_CACHE2, _extends2, _extends3;
PAIR_ADDRESS_CACHE = _extends({}, PAIR_ADDRESS_CACHE, (_extends3 = {}, _extends3[tokens[0].address] = _extends({}, (_PAIR_ADDRESS_CACHE2 = PAIR_ADDRESS_CACHE) === null || _PAIR_ADDRESS_CACHE2 === void 0 ? void 0 : _PAIR_ADDRESS_CACHE2[tokens[0].address], (_extends2 = {}, _extends2[tokens[1].address] = address.getCreate2Address(FACTORY_ADDRESS[tokens[0].chainId], solidity.keccak256(['bytes'], [solidity.pack(['address', 'address'], [tokens[0].address, tokens[1].address])]), INIT_CODE_HASH), _extends2)), _extends3));
}
return PAIR_ADDRESS_CACHE[tokens[0].address][tokens[1].address];
}
/**
* Returns true if the token is either token0 or token1
* @param token to check
*/
;
var _proto = Pair.prototype;
_proto.involvesToken = function involvesToken(token) {
return token.equals(this.token0) || token.equals(this.token1);
}
/**
* Returns the current mid price of the pair in terms of token0, i.e. the ratio of reserve1 to reserve0
*/
;
/**
* Return the price of the given token in terms of the other token in the pair.
* @param token token to return price of
*/
_proto.priceOf = function priceOf(token) {
!this.involvesToken(token) ? invariant(false, 'TOKEN') : void 0;
return token.equals(this.token0) ? this.token0Price : this.token1Price;
}
/**
* Returns the chain ID of the tokens in the pair.
*/
;
_proto.reserveOf = function reserveOf(token) {
!this.involvesToken(token) ? invariant(false, 'TOKEN') : void 0;
return token.equals(this.token0) ? this.reserve0 : this.reserve1;
};
_proto.getOutputAmount = function getOutputAmount(inputAmount) {
!this.involvesToken(inputAmount.token) ? invariant(false, 'TOKEN') : void 0;
if (JSBI.equal(this.reserve0.raw, ZERO) || JSBI.equal(this.reserve1.raw, ZERO)) {
throw new InsufficientReservesError();
}
var inputReserve = this.reserveOf(inputAmount.token);
var outputReserve = this.reserveOf(inputAmount.token.equals(this.token0) ? this.token1 : this.token0);
var inputAmountWithFee = JSBI.multiply(inputAmount.raw, _997);
var numerator = JSBI.multiply(inputAmountWithFee, outputReserve.raw);
var denominator = JSBI.add(JSBI.multiply(inputReserve.raw, _1000), inputAmountWithFee);
var outputAmount = new TokenAmount(inputAmount.token.equals(this.token0) ? this.token1 : this.token0, JSBI.divide(numerator, denominator));
if (JSBI.equal(outputAmount.raw, ZERO)) {
throw new InsufficientInputAmountError();
}
return [outputAmount, new Pair(inputReserve.add(inputAmount), outputReserve.subtract(outputAmount))];
};
_proto.getInputAmount = function getInputAmount(outputAmount) {
!this.involvesToken(outputAmount.token) ? invariant(false, 'TOKEN') : void 0;
if (JSBI.equal(this.reserve0.raw, ZERO) || JSBI.equal(this.reserve1.raw, ZERO) || JSBI.greaterThanOrEqual(outputAmount.raw, this.reserveOf(outputAmount.token).raw)) {
throw new InsufficientReservesError();
}
var outputReserve = this.reserveOf(outputAmount.token);
var inputReserve = this.reserveOf(outputAmount.token.equals(this.token0) ? this.token1 : this.token0);
var numerator = JSBI.multiply(JSBI.multiply(inputReserve.raw, outputAmount.raw), _1000);
var denominator = JSBI.multiply(JSBI.subtract(outputReserve.raw, outputAmount.raw), _997);
var inputAmount = new TokenAmount(outputAmount.token.equals(this.token0) ? this.token1 : this.token0, JSBI.add(JSBI.divide(numerator, denominator), ONE));
return [inputAmount, new Pair(inputReserve.add(inputAmount), outputReserve.subtract(outputAmount))];
};
_proto.getLiquidityMinted = function getLiquidityMinted(totalSupply, tokenAmountA, tokenAmountB) {
!totalSupply.token.equals(this.liquidityToken) ? invariant(false, 'LIQUIDITY') : void 0;
var tokenAmounts = tokenAmountA.token.sortsBefore(tokenAmountB.token) // does safety checks
? [tokenAmountA, tokenAmountB] : [tokenAmountB, tokenAmountA];
!(tokenAmounts[0].token.equals(this.token0) && tokenAmounts[1].token.equals(this.token1)) ? invariant(false, 'TOKEN') : void 0;
var liquidity;
if (JSBI.equal(totalSupply.raw, ZERO)) {
liquidity = JSBI.subtract(sqrt(JSBI.multiply(tokenAmounts[0].raw, tokenAmounts[1].raw)), MINIMUM_LIQUIDITY);
} else {
var amount0 = JSBI.divide(JSBI.multiply(tokenAmounts[0].raw, totalSupply.raw), this.reserve0.raw);
var amount1 = JSBI.divide(JSBI.multiply(tokenAmounts[1].raw, totalSupply.raw), this.reserve1.raw);
liquidity = JSBI.lessThanOrEqual(amount0, amount1) ? amount0 : amount1;
}
if (!JSBI.greaterThan(liquidity, ZERO)) {
throw new InsufficientInputAmountError();
}
return new TokenAmount(this.liquidityToken, liquidity);
};
_proto.getLiquidityValue = function getLiquidityValue(token, totalSupply, liquidity, feeOn, kLast) {
if (feeOn === void 0) {
feeOn = false;
}
!this.involvesToken(token) ? invariant(false, 'TOKEN') : void 0;
!totalSupply.token.equals(this.liquidityToken) ? invariant(false, 'TOTAL_SUPPLY') : void 0;
!liquidity.token.equals(this.liquidityToken) ? invariant(false, 'LIQUIDITY') : void 0;
!JSBI.lessThanOrEqual(liquidity.raw, totalSupply.raw) ? invariant(false, 'LIQUIDITY') : void 0;
var totalSupplyAdjusted;
if (!feeOn) {
totalSupplyAdjusted = totalSupply;
} else {
!!!kLast ? invariant(false, 'K_LAST') : void 0;
var kLastParsed = parseBigintIsh(kLast);
if (!JSBI.equal(kLastParsed, ZERO)) {
var rootK = sqrt(JSBI.multiply(this.reserve0.raw, this.reserve1.raw));
var rootKLast = sqrt(kLastParsed);
if (JSBI.greaterThan(rootK, rootKLast)) {
var numerator = JSBI.multiply(totalSupply.raw, JSBI.subtract(rootK, rootKLast));
var denominator = JSBI.add(JSBI.multiply(rootK, FIVE), rootKLast);
var feeLiquidity = JSBI.divide(numerator, denominator);
totalSupplyAdjusted = totalSupply.add(new TokenAmount(this.liquidityToken, feeLiquidity));
} else {
totalSupplyAdjusted = totalSupply;
}
} else {
totalSupplyAdjusted = totalSupply;
}
}
return new TokenAmount(token, JSBI.divide(JSBI.multiply(liquidity.raw, this.reserveOf(token).raw), totalSupplyAdjusted.raw));
};
_createClass(Pair, [{
key: "token0Price",
get: function get() {
return new Price(this.token0, this.token1, this.tokenAmounts[0].raw, this.tokenAmounts[1].raw);
}
/**
* Returns the current mid price of the pair in terms of token1, i.e. the ratio of reserve0 to reserve1
*/
}, {
key: "token1Price",
get: function get() {
return new Price(this.token1, this.token0, this.tokenAmounts[1].raw, this.tokenAmounts[0].raw);
}
}, {
key: "chainId",
get: function get() {
return this.token0.chainId;
}
}, {
key: "token0",
get: function get() {
return this.tokenAmounts[0].token;
}
}, {
key: "token1",
get: function get() {
return this.tokenAmounts[1].token;
}
}, {
key: "reserve0",
get: function get() {
return this.tokenAmounts[0];
}
}, {
key: "reserve1",
get: function get() {
return this.tokenAmounts[1];
}
}]);
return Pair;
}();
var Route = /*#__PURE__*/function () {
function Route(pairs, input, output) {
!(pairs.length > 0) ? invariant(false, 'PAIRS') : void 0;
!pairs.every(function (pair) {
return pair.chainId === pairs[0].chainId;
}) ? invariant(false, 'CHAIN_IDS') : void 0;
!(input instanceof Token && pairs[0].involvesToken(input) || input === DEV && pairs[0].involvesToken(WDEV[pairs[0].chainId])) ? invariant(false, 'INPUT') : void 0;
!(typeof output === 'undefined' || output instanceof Token && pairs[pairs.length - 1].involvesToken(output) || output === DEV && pairs[pairs.length - 1].involvesToken(WDEV[pairs[0].chainId])) ? invariant(false, 'OUTPUT') : void 0;
var path = [input instanceof Token ? input : WDEV[pairs[0].chainId]];
for (var _iterator = _createForOfIteratorHelperLoose(pairs.entries()), _step; !(_step = _iterator()).done;) {
var _step$value = _step.value,
i = _step$value[0],
pair = _step$value[1];
var currentInput = path[i];
!(currentInput.equals(pair.token0) || currentInput.equals(pair.token1)) ? invariant(false, 'PATH') : void 0;
var _output = currentInput.equals(pair.token0) ? pair.token1 : pair.token0;
path.push(_output);
}
this.pairs = pairs;
this.path = path;
this.midPrice = Price.fromRoute(this);
this.input = input;
this.output = output !== null && output !== void 0 ? output : path[path.length - 1];
}
_createClass(Route, [{
key: "chainId",
get: function get() {
return this.pairs[0].chainId;
}
}]);
return Route;
}();
var _100_PERCENT = /*#__PURE__*/new Fraction(_100);
var Percent = /*#__PURE__*/function (_Fraction) {
_inheritsLoose(Percent, _Fraction);
function Percent() {
return _Fraction.apply(this, arguments) || this;
}
var _proto = Percent.prototype;
_proto.toSignificant = function toSignificant(significantDigits, format, rounding) {
if (significantDigits === void 0) {
significantDigits = 5;
}
return this.multiply(_100_PERCENT).toSignificant(significantDigits, format, rounding);
};
_proto.toFixed = function toFixed(decimalPlaces, format, rounding) {
if (decimalPlaces === void 0) {
decimalPlaces = 2;
}
return this.multiply(_100_PERCENT).toFixed(decimalPlaces, format, rounding);
};
return Percent;
}(Fraction);
/**
* Returns the percent difference between the mid price and the execution price, i.e. price impact.
* @param midPrice mid price before the trade
* @param inputAmount the input amount of the trade
* @param outputAmount the output amount of the trade
*/
function computePriceImpact(midPrice, inputAmount, outputAmount) {
var exactQuote = midPrice.raw.multiply(inputAmount.raw); // calculate slippage := (exactQuote - outputAmount) / exactQuote
var slippage = exactQuote.subtract(outputAmount.raw).divide(exactQuote);
return new Percent(slippage.numerator, slippage.denominator);
} // comparator function that allows sorting trades by their output amounts, in decreasing order, and then input amounts
// in increasing order. i.e. the best trades have the most outputs for the least inputs and are sorted first
function inputOutputComparator(a, b) {
// must have same input and output token for comparison
!currencyEquals(a.inputAmount.currency, b.inputAmount.currency) ? invariant(false, 'INPUT_CURRENCY') : void 0;
!currencyEquals(a.outputAmount.currency, b.outputAmount.currency) ? invariant(false, 'OUTPUT_CURRENCY') : void 0;
if (a.outputAmount.equalTo(b.outputAmount)) {
if (a.inputAmount.equalTo(b.inputAmount)) {
return 0;
} // trade A requires less input than trade B, so A should come first
if (a.inputAmount.lessThan(b.inputAmount)) {
return -1;
} else {
return 1;
}
} else {
// tradeA has less output than trade B, so should come second
if (a.outputAmount.lessThan(b.outputAmount)) {
return 1;
} else {
return -1;
}
}
} // extension of the input output comparator that also considers other dimensions of the trade in ranking them
function tradeComparator(a, b) {
var ioComp = inputOutputComparator(a, b);
if (ioComp !== 0) {
return ioComp;
} // consider lowest slippage next, since these are less likely to fail
if (a.priceImpact.lessThan(b.priceImpact)) {
return -1;
} else if (a.priceImpact.greaterThan(b.priceImpact)) {
return 1;
} // finally consider the number of hops since each hop costs gas
return a.route.path.length - b.route.path.length;
}
/**
* Given a currency amount and a chain ID, returns the equivalent representation as the token amount.
* In other words, if the currency is DEV, returns the WDEV token amount for the given chain. Otherwise, returns
* the input currency amount.
*/
function wrappedAmount(currencyAmount, chainId) {
if (currencyAmount instanceof TokenAmount) return currencyAmount;
if (currencyAmount.currency === DEV) return new TokenAmount(WDEV[chainId], currencyAmount.raw);
invariant(false, 'CURRENCY') ;
}
function wrappedCurrency(currency, chainId) {
if (currency instanceof Token) return currency;
if (currency === DEV) return WDEV[chainId];
invariant(false, 'CURRENCY') ;
}
/**
* Represents a trade executed against a list of pairs.
* Does not account for slippage, i.e. trades that front run this trade and move the price.
*/
var Trade = /*#__PURE__*/function () {
function Trade(route, amount, tradeType) {
var amounts = new Array(route.path.length);
var nextPairs = new Array(route.pairs.length);
if (tradeType === exports.TradeType.EXACT_INPUT) {
!currencyEquals(amount.currency, route.input) ? invariant(false, 'INPUT') : void 0;
amounts[0] = wrappedAmount(amount, route.chainId);
for (var i = 0; i < route.path.length - 1; i++) {
var pair = route.pairs[i];
var _pair$getOutputAmount = pair.getOutputAmount(amounts[i]),
outputAmount = _pair$getOutputAmount[0],
nextPair = _pair$getOutputAmount[1];
amounts[i + 1] = outputAmount;
nextPairs[i] = nextPair;
}
} else {
!currencyEquals(amount.currency, route.output) ? invariant(false, 'OUTPUT') : void 0;
amounts[amounts.length - 1] = wrappedAmount(amount, route.chainId);
for (var _i = route.path.length - 1; _i > 0; _i--) {
var _pair = route.pairs[_i - 1];
var _pair$getInputAmount = _pair.getInputAmount(amounts[_i]),
inputAmount = _pair$getInputAmount[0],
_nextPair = _pair$getInputAmount[1];
amounts[_i - 1] = inputAmount;
nextPairs[_i - 1] = _nextPair;
}
}
this.route = route;
this.tradeType = tradeType;
this.inputAmount = tradeType === exports.TradeType.EXACT_INPUT ? amount : route.input === DEV ? CurrencyAmount.ether(amounts[0].raw) : amounts[0];
this.outputAmount = tradeType === exports.TradeType.EXACT_OUTPUT ? amount : route.output === DEV ? CurrencyAmount.ether(amounts[amounts.length - 1].raw) : amounts[amounts.length - 1];
this.executionPrice = new Price(this.inputAmount.currency, this.outputAmount.currency, this.inputAmount.raw, this.outputAmount.raw);
this.nextMidPrice = Price.fromRoute(new Route(nextPairs, route.input));
this.priceImpact = computePriceImpact(route.midPrice, this.inputAmount, this.outputAmount);
}
/**
* Constructs an exact in trade with the given amount in and route
* @param route route of the exact in trade
* @param amountIn the amount being passed in
*/
Trade.exactIn = function exactIn(route, amountIn) {
return new Trade(route, amountIn, exports.TradeType.EXACT_INPUT);
}
/**
* Constructs an exact out trade with the given amount out and route
* @param route route of the exact out trade
* @param amountOut the amount returned by the trade
*/
;
Trade.exactOut = function exactOut(route, amountOut) {
return new Trade(route, amountOut, exports.TradeType.EXACT_OUTPUT);
}
/**
* Get the minimum amount that must be received from this trade for the given slippage tolerance
* @param slippageTolerance tolerance of unfavorable slippage from the execution price of this trade
*/
;
var _proto = Trade.prototype;
_proto.minimumAmountOut = function minimumAmountOut(slippageTolerance) {
!!slippageTolerance.lessThan(ZERO) ? invariant(false, 'SLIPPAGE_TOLERANCE') : void 0;
if (this.tradeType === exports.TradeType.EXACT_OUTPUT) {
return this.outputAmount;
} else {
var slippageAdjustedAmountOut = new Fraction(ONE).add(slippageTolerance).invert().multiply(this.outputAmount.raw).quotient;
return this.outputAmount instanceof TokenAmount ? new TokenAmount(this.outputAmount.token, slippageAdjustedAmountOut) : CurrencyAmount.ether(slippageAdjustedAmountOut);
}
}
/**
* Get the maximum amount in that can be spent via this trade for the given slippage tolerance
* @param slippageTolerance tolerance of unfavorable slippage from the execution price of this trade
*/
;
_proto.maximumAmountIn = function maximumAmountIn(slippageTolerance) {
!!slippageTolerance.lessThan(ZERO) ? invariant(false, 'SLIPPAGE_TOLERANCE') : void 0;
if (this.tradeType === exports.TradeType.EXACT_INPUT) {
return this.inputAmount;
} else {
var slippageAdjustedAmountIn = new Fraction(ONE).add(slippageTolerance).multiply(this.inputAmount.raw).quotient;
return this.inputAmount instanceof TokenAmount ? new TokenAmount(this.inputAmount.token, slippageAdjustedAmountIn) : CurrencyAmount.ether(slippageAdjustedAmountIn);
}
}
/**
* Given a list of pairs, and a fixed amount in, returns the top `maxNumResults` trades that go from an input token
* amount to an output token, making at most `maxHops` hops.
* Note this does not consider aggregation, as routes are linear. It's possible a better route exists by splitting
* the amount in among multiple routes.
* @param pairs the pairs to consider in finding the best trade
* @param currencyAmountIn exact amount of input currency to spend
* @param currencyOut the desired currency out
* @param maxNumResults maximum number of results to return
* @param maxHops maximum number of hops a returned trade can make, e.g. 1 hop goes through a single pair
* @param currentPairs used in recursion; the current list of pairs
* @param originalAmountIn used in recursion; the original value of the currencyAmountIn parameter
* @param bestTrades used in recursion; the current list of best trades
*/
;
Trade.bestTradeExactIn = function bestTradeExactIn(pairs, currencyAmountIn, currencyOut, _temp, // used in recursion.
currentPairs, originalAmountIn, bestTrades) {
var _ref = _temp === void 0 ? {} : _temp,
_ref$maxNumResults = _ref.maxNumResults,
maxNumResults = _ref$maxNumResults === void 0 ? 3 : _ref$maxNumResults,
_ref$maxHops = _ref.maxHops,
maxHops = _ref$maxHops === void 0 ? 3 : _ref$maxHops;
if (currentPairs === void 0) {
currentPairs = [];
}
if (originalAmountIn === void 0) {
originalAmountIn = currencyAmountIn;
}
if (bestTrades === void 0) {
bestTrades = [];
}
!(pairs.length > 0) ? invariant(false, 'PAIRS') : void 0;
!(maxHops > 0) ? invariant(false, 'MAX_HOPS') : void 0;
!(originalAmountIn === currencyAmountIn || currentPairs.length > 0) ? invariant(false, 'INVALID_RECURSION') : void 0;
var chainId = currencyAmountIn instanceof TokenAmount ? currencyAmountIn.token.chainId : currencyOut instanceof Token ? currencyOut.chainId : undefined;
!(chainId !== undefined) ? invariant(false, 'CHAIN_ID') : void 0;
var amountIn = wrappedAmount(currencyAmountIn, chainId);
var tokenOut = wrappedCurrency(currencyOut, chainId);
for (var i = 0; i < pairs.length; i++) {
var pair = pairs[i]; // pair irrelevant
if (!pair.token0.equals(amountIn.token) && !pair.token1.equals(amountIn.token)) continue;
if (pair.reserve0.equalTo(ZERO) || pair.reserve1.equalTo(ZERO)) continue;
var amountOut = void 0;
try {
;
var _pair$getOutputAmount2 = pair.getOutputAmount(amountIn);
amountOut = _pair$getOutputAmount2[0];
} catch (error) {
// input too low
if (error.isInsufficientInputAmountError) {
continue;
}
throw error;
} // we have arrived at the output token, so this is the final trade of one of the paths
if (amountOut.token.equals(tokenOut)) {
sortedInsert(bestTrades, new Trade(new Route([].concat(currentPairs, [pair]), originalAmountIn.currency, currencyOut), originalAmountIn, exports.TradeType.EXACT_INPUT), maxNumResults, tradeComparator);
} else if (maxHops > 1 && pairs.length > 1) {
var pairsExcludingThisPair = pairs.slice(0, i).concat(pairs.slice(i + 1, pairs.length)); // otherwise, consider all the other paths that lead from this token as long as we have not exceeded maxHops
Trade.bestTradeExactIn(pairsExcludingThisPair, amountOut, currencyOut, {
maxNumResults: maxNumResults,
maxHops: maxHops - 1
}, [].concat(currentPairs, [pair]), originalAmountIn, bestTrades);
}
}
return bestTrades;
}
/**
* similar to the above method but instead targets a fixed output amount
* given a list of pairs, and a fixed amount out, returns the top `maxNumResults` trades that go from an input token
* to an output token amount, making at most `maxHops` hops
* note this does not consider aggregation, as routes are linear. it's possible a better route exists by splitting
* the amount in among multiple routes.
* @param pairs the pairs to consider in finding the best trade
* @param currencyIn the currency to spend
* @param currencyAmountOut the exact amount of currency out
* @param maxNumResults maximum number of results to return
* @param maxHops maximum number of hops a returned trade can make, e.g. 1 hop goes through a single pair
* @param currentPairs used in recursion; the current list of pairs
* @param originalAmountOut used in recursion; the original value of the currencyAmountOut parameter
* @param bestTrades used in recursion; the current list of best trades
*/
;
Trade.bestTradeExactOut = function bestTradeExactOut(pairs, currencyIn, currencyAmountOut, _temp2, // used in recursion.
currentPairs, originalAmountOut, bestTrades) {
var _ref2 = _temp2 === void 0 ? {} : _temp2,
_ref2$