mtcute/packages/client/src/methods/auth/send-code.ts

import { TelegramClient } from '../../client'
import { SentCode } from '../../types'
import { normalizePhoneNumber } from '../../utils/misc-utils'
import { assertTypeIs } from '../../utils/type-assertion'

/**
 * Send the confirmation code to the given phone number
 *
 * @param phone  Phone number in international format.
 * @returns  An object containing information about the sent confirmation code
 * @internal
 */
export async function sendCode(
    this: TelegramClient,
    phone: string,
): Promise<SentCode> {
    phone = normalizePhoneNumber(phone)

    const res = await this.call({
        _: 'auth.sendCode',
        phoneNumber: phone,
        apiId: this.network._initConnectionParams.apiId,
        apiHash: this._apiHash,
        settings: { _: 'codeSettings' },
    })

    assertTypeIs('sendCode', res, 'auth.sentCode')

    return new SentCode(res)
}