penx/apps/extension/lib/extractErrorMessage.ts

export function extractErrorMessage(error: any) {
  const userRejectedMessageRaw = `User rejected the request`
  if (!error.shortMessage) {
    return error.message || `Unknown error`
  }

  const shortMessage: string = error?.shortMessage || ''

  if (shortMessage.includes(userRejectedMessageRaw)) {
    return `User rejected the request`
  }

  if (shortMessage.includes('reverted with the following reason:')) {
    return shortMessage.split('reverted with the following reason:')[1]
  }

  if (Array.isArray(error.metaMessages) && error.metaMessages.length > 0) {
    let errorName: string = error.metaMessages[0] || ''

    errorName = errorName
      .replace(/^Error: /, '')
      .replace(/\(.*\)$/, '')
      .trim()

    return errorName || `Unknown error`
  }

  return shortMessage || error.message || `Unknown error`
}