thai-bank-transfer-qr

Minimal, dependency-free Thai bank transfer QR payload builder (PromptPay / Tag 29 + CRC16-CCITT).

Install

npm install thai-bank-transfer-qr

Usage

import buildThaiQRBankTransfer from "thai-bank-transfer-qr"

const payload = buildThaiQRBankTransfer({
  bankCode: "004",            // example only
  accountNumber: "1234567890", // example only
  amount: 10,
})

console.log(payload)

PromptPay phone number QR (Tag 29 subtag 01, amount optional):

import { buildThaiQRPromptPayPhone } from "thai-bank-transfer-qr"

const phonePayload = buildThaiQRPromptPayPhone({
  phoneNumber: "+66 81 234 5678", // accepts +66 / 66 / 0-leading
  amount: 25.5,                   // optional; omit for open amount
})

console.log(phonePayload)

API

• buildThaiQRBankTransfer(options)
  • bankCode: string (3 digits)
  • accountNumber: string (digits only)
  • amount: number|string (formatted to 2 decimals)
• buildThaiQRPromptPayPhone(options)
  • phoneNumber: string|number (Thai mobile in +66 / 66 / 0 format)
  • amount?: number|string (optional fixed amount; omit to allow payer entry)
• Validators (throw on invalid input):
  • validateBankCode(bankCode)
  • validateAccountNumber(accountNumber)
  • validateAmount(amount)
  • validateOptionalAmount(amount) // returns null if empty/undefined
  • validatePhoneNumber(phoneNumber) // returns normalized 0066 + 9 digits

Also exports: tlv, crc16CCITT.

License

MIT