@lifi/widget
Version:
LI.FI Widget for cross-chain bridging and swapping. It will drive your multi-chain strategy and attract new users from everywhere.
75 lines • 2.56 kB
JavaScript
import { formatUnits } from 'viem';
/**
* Format token amount to at least 6 decimals.
* @param amount amount to format.
* @returns formatted amount.
*/
export function formatTokenAmount(amount, decimals) {
const formattedAmount = amount ? formatUnits(amount, decimals) : '0';
const parsedAmount = Number.parseFloat(formattedAmount);
if (!parsedAmount || Number.isNaN(Number(formattedAmount))) {
return '0';
}
return formattedAmount;
}
export function formatSlippage(slippage = '', defaultValue = '', returnInitial = false) {
if (!slippage) {
return slippage;
}
const parsedSlippage = Number.parseFloat(slippage);
if (Number.isNaN(Number(slippage)) && !Number.isNaN(parsedSlippage)) {
return parsedSlippage.toString();
}
if (Number.isNaN(parsedSlippage)) {
return defaultValue;
}
if (parsedSlippage > 100) {
return '100';
}
if (parsedSlippage < 0) {
return Math.abs(parsedSlippage).toString();
}
if (returnInitial) {
return slippage;
}
return parsedSlippage.toString();
}
export function formatInputAmount(amount, decimals = null, returnInitial = false) {
if (!amount) {
return amount;
}
let formattedAmount = amount.trim().replaceAll(',', '.');
if (formattedAmount.startsWith('.')) {
formattedAmount = `0${formattedAmount}`;
}
const parsedAmount = Number.parseFloat(formattedAmount);
if (Number.isNaN(Number(formattedAmount)) && !Number.isNaN(parsedAmount)) {
return parsedAmount.toString();
}
if (Number.isNaN(Math.abs(Number(formattedAmount)))) {
return '';
}
if (returnInitial) {
return formattedAmount;
}
let [integer, fraction = ''] = formattedAmount.split('.');
if (decimals !== null && fraction.length > decimals) {
fraction = fraction.slice(0, decimals);
}
integer = integer.replace(/^0+|-/, '');
fraction = fraction.replace(/(0+)$/, '');
return `${integer || (fraction ? '0' : '')}${fraction ? `.${fraction}` : ''}`;
}
export function formatTokenPrice(amount, price, decimals) {
if (!amount || !price) {
return 0;
}
const formattedAmount = typeof amount === 'bigint' && decimals !== undefined
? formatUnits(amount, decimals)
: amount.toString();
if (Number.isNaN(Number(formattedAmount)) || Number.isNaN(Number(price))) {
return 0;
}
return Number.parseFloat(formattedAmount) * Number.parseFloat(price);
}
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