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• [DIR] ..
• [FILE] formatEther.ts
• [FILE] formatGwei.ts
• [FILE] formatUnits.ts
• [FILE] parseEther.ts
• [FILE] parseGwei.ts
• [FILE] parseUnits.ts

Просмотр файла: formatUnits.ts

import type { ErrorType } from '../../errors/utils.js'

export type FormatUnitsErrorType = ErrorType

/**
 *  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: bigint, decimals: number) {
  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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