IOTA address and checksum

IOTA101_39B011574CF0.js

// The snippet is a part of the IOTA Developer Essentials project. You can reach it at https://hribek25.github.io/IOTA101/
// Complete description and story behind the snippet is available at: https://hribek25.github.io/IOTA101/Allchapters_javascript.ipynb.html#39B011574CF0
// Requirement: A checksum module of IOTA Javascript Library (!npm install @iota/checksum)

var iotalib = require('@iota/checksum'); //this package is also useful when validating an address

//some IOTA address
var Adr = "CYJV9DRIE9NCQJYLOYOJOGKQGOOELTWXVWUYGQSWCNODHJAHACADUAAHQ9ODUICCESOIVZABA9LTMM9RW";

console.log("Original input excl. checksum address:");
console.log(Adr);
console.log("Length: %s", Adr.length)

var AdrInclCheckSum = iotalib.addChecksum(Adr); //generate checksum for the given address
console.log("Input address including checksum:")
console.log(AdrInclCheckSum) // the last 9 trytes is the checksum
console.log("Length incl checksum: %s", AdrInclCheckSum.length)