Trade

constructor(route: Route, amount: TokenAmount, tradeType: TradeType)

The Trade entity represents a fully specified trade along a route. This entity supplies all the information necessary to craft a router transaction.

Example

import { ChainId, Token, TokenAmount, Pair, TradeType, Route } from '@uniswap/sdk'

const HOT = new Token(ChainId.MAINNET, '0xc0FFee0000000000000000000000000000000000', 18, 'HOT', 'Caffeine')
const NOT = new Token(ChainId.MAINNET, '0xDeCAf00000000000000000000000000000000000', 18, 'NOT', 'Caffeine')
const HOT_NOT = new Pair(new TokenAmount(HOT, '2000000000000000000'), new TokenAmount(NOT, '1000000000000000000'))
const NOT_TO_HOT = new Route([HOT_NOT], NOT)

const trade = new Trade(NOT_TO_HOT, new TokenAmount(NOT, '1000000000000000'), TradeType.EXACT_INPUT)

Properties

route

route: Route

The path property of the route should be passed as the path parameter to router functions.

tradeType

tradeType: TradeType

TradeType.EXACT_INPUT corresponds to swapExact*For* router functions. TradeType.EXACT_OUTPUT corresponds to swap*ForExact* router functions.

inputAmount

inputAmount: TokenAmount

For exact input trades, this value should be passed as amountIn to router functions. For exact output trades, this value should be multiplied by a factor >1, representing slippage tolerance, and passed as amountInMax to router functions.

outputAmount

outputAmount: TokenAmount

For exact output trades, this value should be passed as amountOut to router functions. For exact input trades, this value should be multiplied by a factor <1, representing slippage tolerance, and passed as amountOutMin to router functions.

executionPrice

executionPrice: Price

The average price that the trade would execute at.

nextMidPrice

nextMidPrice: Price

What the new mid price would be if the trade were to execute.

slippage

slippage: Percent

The slippage incurred by the trade.

  • Strictly > .30%.

Methods

In the context of the following two methods, slippage refers to the percent difference between the actual price and the trade executionPrice.

minimumAmountOut (since 2.0.4)

minimumAmountOut(slippageTolerance: Percent): TokenAmount

Returns the minimum amount of the output token that should be received from a trade, given the slippage tolerance.

Useful when constructing a transaction for a trade of type EXACT_IN.

maximumAmountIn (since 2.0.4)

maximumAmountIn(slippageTolerance: Percent): TokenAmount

Returns the maximum amount of the input token that should be spent on the trade, given the slippage tolerance.

Useful when constructing a transaction for a trade of type EXACT_OUT.

Static methods

These static methods provide ways to construct ideal trades from lists of pairs. Note these methods do not perform any aggregation across routes, as routes are linear. It’s possible that a better price can be had by combining multiple trades across different routes.

bestTradeExactIn

Given a list of pairs, a fixed amount in, and token amount out, this method returns the best maxNumResults trades that swap an input token amount to an output token, making at most maxHops hops. The returned trades are sorted by output amount, in decreasing order, and all share the given input amount.

Trade.bestTradeExactIn(
pairs: Pair[],
amountIn: TokenAmount,
tokenOut: Token,
{ maxNumResults = 3, maxHops = 3 }: BestTradeOptions = {}): Trade[]

bestTradeExactOut

Similar to the above method, but targets a fixed output token amount. The returned trades are sorted by input amount, in increasing order, and all share the given output amount.

Trade.bestTradeExactOut(
pairs: Pair[],
tokenIn: Token,
amountOut: TokenAmount,
{ maxNumResults = 3, maxHops = 3 }: BestTradeOptions = {}): Trade[]