luhn-bvr.js

#!/usr/bin/node


function luhnMod10 (bvr){
	var k, I=0;
	var zr_post = "0946827135094682713" ;

	for (var J = 0 ; J< bvr.length; J++){
	  k = parseInt(bvr.charAt(J));
	  I = parseInt(zr_post.charAt(I+k));
	}
	return (10-I) % 10;
};


function validBVR(ref) {
	var luhn=luhnMod10 (ref.substring(0, ref.length-1));
	return (luhn) == parseInt(ref.charAt(ref.length -1)) ;
};



console.log('valid 052789000583104300002534930',validBVR('052789000583104300002534930'));
console.log('valid 001141636433009254020220167',validBVR('001141636433009254020220167'));