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entities.test.ts
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entities.test.ts
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import JSBI from 'jsbi'
import invariant from 'tiny-invariant'
import { WETH9 as _WETH9, TradeType, Token, CurrencyAmount } from '@uniswap/sdk-core'
import { Pair, Route, Trade } from '../index'
const ADDRESSES = [
'0x0000000000000000000000000000000000000001',
'0x0000000000000000000000000000000000000002',
'0x0000000000000000000000000000000000000003'
]
const CHAIN_ID = 3
const WETH9 = _WETH9[3]
const DECIMAL_PERMUTATIONS: [number, number, number][] = [
[0, 0, 0],
[0, 9, 18],
[18, 18, 18]
]
function decimalize(amount: number, decimals: number): JSBI {
return JSBI.multiply(JSBI.BigInt(amount), JSBI.exponentiate(JSBI.BigInt(10), JSBI.BigInt(decimals)))
}
describe('entities', () => {
DECIMAL_PERMUTATIONS.forEach(decimals => {
describe(`decimals permutation: ${decimals}`, () => {
let tokens: Token[]
beforeAll(() => {
tokens = ADDRESSES.map((address, i) => new Token(CHAIN_ID, address, decimals[i]))
})
let pairs: Pair[]
it('Pair', () => {
pairs = [
new Pair(
CurrencyAmount.fromRawAmount(tokens[0], decimalize(1, tokens[0].decimals)),
CurrencyAmount.fromRawAmount(tokens[1], decimalize(1, tokens[1].decimals))
),
new Pair(
CurrencyAmount.fromRawAmount(tokens[1], decimalize(1, tokens[1].decimals)),
CurrencyAmount.fromRawAmount(tokens[2], decimalize(1, tokens[2].decimals))
),
new Pair(
CurrencyAmount.fromRawAmount(tokens[2], decimalize(1, tokens[2].decimals)),
CurrencyAmount.fromRawAmount(WETH9, decimalize(1234, WETH9.decimals))
)
]
})
let route: Route<Token, Token>
it('Route', () => {
route = new Route(pairs, tokens[0], WETH9)
expect(route.pairs).toEqual(pairs)
expect(route.path).toEqual(tokens.concat([WETH9]))
expect(route.input).toEqual(tokens[0])
expect(route.output).toEqual(WETH9)
})
it('#midPrice', () => {
invariant(route.input.isToken)
invariant(route.output.isToken)
expect(
route.midPrice.quote(CurrencyAmount.fromRawAmount(route.input, decimalize(1, route.input.decimals))).toExact()
).toEqual(CurrencyAmount.fromRawAmount(route.output, decimalize(1234, route.output.decimals)).toExact())
expect(
route.midPrice
.invert()
.quote(CurrencyAmount.fromRawAmount(route.output, decimalize(1234, route.output.decimals)))
.toExact()
).toEqual(CurrencyAmount.fromRawAmount(route.input, decimalize(1, route.input.decimals)).toExact())
expect(route.midPrice.invert().toSignificant(5)).toEqual('0.00081037')
expect(route.midPrice.toFixed(2)).toEqual('1234.00')
expect(route.midPrice.invert().toFixed(8)).toEqual('0.00081037')
})
describe('Trade', () => {
let route: Route<Token, Token>
it('TradeType.EXACT_INPUT', () => {
route = new Route(
[
new Pair(
CurrencyAmount.fromRawAmount(tokens[1], decimalize(5, tokens[1].decimals)),
CurrencyAmount.fromRawAmount(WETH9, decimalize(10, WETH9.decimals))
)
],
tokens[1],
WETH9
)
const inputAmount = CurrencyAmount.fromRawAmount(tokens[1], decimalize(1, tokens[1].decimals))
const expectedOutputAmount = CurrencyAmount.fromRawAmount(WETH9, '1662497915624478906')
const trade = new Trade(route, inputAmount, TradeType.EXACT_INPUT)
expect(trade.route).toEqual(route)
expect(trade.tradeType).toEqual(TradeType.EXACT_INPUT)
expect(trade.inputAmount).toEqual(inputAmount)
expect(trade.outputAmount).toEqual(expectedOutputAmount)
expect(trade.executionPrice.toSignificant(18)).toEqual('1.66249791562447891')
expect(trade.executionPrice.invert().toSignificant(18)).toEqual('0.601504513540621866')
expect(trade.executionPrice.quote(inputAmount).quotient).toEqual(expectedOutputAmount.quotient)
expect(trade.executionPrice.invert().quote(expectedOutputAmount).quotient).toEqual(inputAmount.quotient)
expect(trade.priceImpact.toSignificant(18)).toEqual('16.8751042187760547')
})
it('TradeType.EXACT_OUTPUT', () => {
const outputAmount = CurrencyAmount.fromRawAmount(WETH9, '1662497915624478906')
const expectedInputAmount = CurrencyAmount.fromRawAmount(tokens[1], decimalize(1, tokens[1].decimals))
const trade = new Trade(route, outputAmount, TradeType.EXACT_OUTPUT)
expect(trade.route).toEqual(route)
expect(trade.tradeType).toEqual(TradeType.EXACT_OUTPUT)
expect(trade.outputAmount).toEqual(outputAmount)
expect(trade.inputAmount).toEqual(expectedInputAmount)
expect(trade.executionPrice.toSignificant(18)).toEqual('1.66249791562447891')
expect(trade.executionPrice.invert().toSignificant(18)).toEqual('0.601504513540621866')
expect(trade.executionPrice.quote(expectedInputAmount).quotient).toEqual(outputAmount.quotient)
expect(trade.executionPrice.invert().quote(outputAmount).quotient).toEqual(expectedInputAmount.quotient)
expect(trade.priceImpact.toSignificant(18)).toEqual('16.8751042187760547')
})
it('minimum TradeType.EXACT_INPUT', () => {
if ([9, 18].includes(tokens[1].decimals)) {
const route = new Route(
[
new Pair(
CurrencyAmount.fromRawAmount(tokens[1], decimalize(1, tokens[1].decimals)),
CurrencyAmount.fromRawAmount(
WETH9,
JSBI.add(
decimalize(10, WETH9.decimals),
tokens[1].decimals === 9 ? JSBI.BigInt('30090280812437312') : JSBI.BigInt('30090270812437322')
)
)
)
],
tokens[1],
WETH9
)
const outputAmount = CurrencyAmount.fromRawAmount(tokens[1], '1')
const trade = new Trade(route, outputAmount, TradeType.EXACT_INPUT)
expect(trade.priceImpact.toSignificant(18)).toEqual(
tokens[1].decimals === 9 ? '0.300000099400899902' : '0.3000000000000001'
)
}
})
})
})
})
})