https://www.npmjs.com/package/24pay
const p24 = require("24pay")
const key = "1234567812345678123456781234567812345678123456781234567812345678"
const iv = "demoOMEDDEMOomed"
const text = "demoOMED10.50EUR10000TestPayment2014-05-05 14:57:13"
const signed = p24(key, iv, text)
console.info(signed) // 51762BFDA1DEBF57B8F655FC113F6062
Do IV the from your "Mid" combined with reversed form of "Mid" Eg. If Mid is "abc123", IV param should be "abc123321cba"
Use as far as you want. If you are a good person, buy me a beer.
Author Samuel Ondrek