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Текущая директория: /usr/lib/node_modules/bitgo/node_modules/viem/utils/hash

Просмотр файла: normalizeSignature.ts

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

type NormalizeSignatureParameters = string
type NormalizeSignatureReturnType = string
export type NormalizeSignatureErrorType = ErrorType

export function normalizeSignature(
  signature: NormalizeSignatureParameters,
): NormalizeSignatureReturnType {
  let active = true
  let current = ''
  let level = 0
  let result = ''
  let valid = false

  for (let i = 0; i < signature.length; i++) {
    const char = signature[i]

    // If the character is a separator, we want to reactivate.
    if (['(', ')', ','].includes(char)) active = true

    // If the character is a "level" token, we want to increment/decrement.
    if (char === '(') level++
    if (char === ')') level--

    // If we aren't active, we don't want to mutate the result.
    if (!active) continue

    // If level === 0, we are at the definition level.
    if (level === 0) {
      if (char === ' ' && ['event', 'function', ''].includes(result))
        result = ''
      else {
        result += char

        // If we are at the end of the definition, we must be finished.
        if (char === ')') {
          valid = true
          break
        }
      }

      continue
    }

    // Ignore spaces
    if (char === ' ') {
      // If the previous character is a separator, and the current section isn't empty, we want to deactivate.
      if (signature[i - 1] !== ',' && current !== ',' && current !== ',(') {
        current = ''
        active = false
      }
      continue
    }

    result += char
    current += char
  }

  if (!valid) throw new BaseError('Unable to normalize signature.')

  return result
}

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