viem
Version:
25 lines • 838 B
JavaScript
/**
* Divides a number by a given exponent of base 10 (10exponent), and formats it into a string representation of the number..
*
* - Docs: https://viem.sh/docs/utilities/formatUnits
*
* @example
* import { formatUnits } from 'viem'
*
* formatUnits(420000000000n, 9)
* // '420'
*/
export function formatUnits(value, decimals) {
let display = value.toString();
const negative = display.startsWith('-');
if (negative)
display = display.slice(1);
display = display.padStart(decimals, '0');
let [integer, fraction] = [
display.slice(0, display.length - decimals),
display.slice(display.length - decimals),
];
fraction = fraction.replace(/(0+)$/, '');
return `${negative ? '-' : ''}${integer || '0'}${fraction ? `.${fraction}` : ''}`;
}
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