@uniswap/smart-order-router
Version:
Uniswap Smart Order Router
82 lines • 5.7 kB
JavaScript
import { parseUnits } from '@ethersproject/units';
import { ADDRESS_ZERO } from '@uniswap/router-sdk';
import { ChainId, CurrencyAmount as CurrencyAmountRaw, } from '@uniswap/sdk-core';
import { FeeAmount, TICK_SPACINGS } from '@uniswap/v3-sdk';
import JSBI from 'jsbi';
export class CurrencyAmount extends CurrencyAmountRaw {
}
export const MAX_UINT160 = '0xffffffffffffffffffffffffffffffffffffffff';
// Try to parse a user entered amount for a given token
export function parseAmount(value, currency) {
const typedValueParsed = parseUnits(value, currency.decimals).toString();
return CurrencyAmount.fromRawAmount(currency, JSBI.BigInt(typedValueParsed));
}
export function parseFeeAmount(feeAmountStr) {
switch (feeAmountStr) {
case '10000':
return FeeAmount.HIGH;
case '3000':
return FeeAmount.MEDIUM;
case '500':
return FeeAmount.LOW;
case '400':
return FeeAmount.LOW_400;
case '300':
return FeeAmount.LOW_300;
case '200':
return FeeAmount.LOW_200;
case '100':
return FeeAmount.LOWEST;
default:
throw new Error(`Fee amount ${feeAmountStr} not supported.`);
}
}
export function unparseFeeAmount(feeAmount) {
switch (feeAmount) {
case FeeAmount.HIGH:
return '10000';
case FeeAmount.MEDIUM:
return '3000';
case FeeAmount.LOW:
return '500';
case FeeAmount.LOW_400:
return '400';
case FeeAmount.LOW_300:
return '300';
case FeeAmount.LOW_200:
return '200';
case FeeAmount.LOWEST:
return '100';
default:
throw new Error(`Fee amount ${feeAmount} not supported.`);
}
}
export function getApplicableV3FeeAmounts(chainId) {
const feeAmounts = [
FeeAmount.HIGH,
FeeAmount.MEDIUM,
FeeAmount.LOW,
FeeAmount.LOWEST,
];
if (chainId === ChainId.BASE) {
feeAmounts.push(FeeAmount.LOW_200, FeeAmount.LOW_300, FeeAmount.LOW_400);
}
return feeAmounts;
}
export function getApplicableV4FeesTickspacingsHooks(chainId) {
const feeAmounts = [
FeeAmount.HIGH,
FeeAmount.MEDIUM,
FeeAmount.LOW,
FeeAmount.LOWEST,
];
if (chainId === ChainId.BASE) {
feeAmounts.push(FeeAmount.LOW_200, FeeAmount.LOW_300, FeeAmount.LOW_400);
}
return feeAmounts.map((feeAmount) => [
feeAmount,
TICK_SPACINGS[feeAmount],
ADDRESS_ZERO,
]);
}
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