Decode Toast Blue Code

const BN = require('bn.js') const hexToBytes = (a) => { return new BN(a, 16).toArray(null, a.length / 2) } const decodeToastOfflineCode = (code) => { let offlinecode = code.trim().toUpperCase().replace(/[^A-Z0-9]/g, '') let accID let ledID let fee if (/^[A-F0-9]+$/m.test(offlinecode)) { try { let compression = hexToBytes(offlinecode.slice(2, 4)) offlinecode = offlinecode.slice(4) let removedZerosLedId = compression & 7 let removedZerosAccId = compression >> 3 accID = '0'.repeat(removedZerosAccId) + offlinecode.slice(0, 8 - removedZerosAccId) offlinecode = offlinecode.slice(8 - removedZerosAccId) ledID = '0'.repeat(removedZerosLedId) + offlinecode.slice(0, 8 - removedZerosLedId) offlinecode = offlinecode.slice(8 - removedZerosLedId) while (offlinecode.length < 8) offlinecode = '0' + offlinecode fee = offlinecode offlinecode = accID + ledID + fee } catch (e) { console.log(e.message) } } return { accID: parseInt('0x' + accID), ledID: parseInt('0x' + ledID), fee: parseInt('0x' + fee) / 1000000 } } console.log(decodeToastOfflineCode('703A 12C5 173C'))