@xuxinlai2002/pns-js
Version:
A NPM package in Typescript for .Play Name Service
31 lines (23 loc) • 634 B
JavaScript
var sha3 = require('js-sha3').keccak_256
var uts46 = require('idna-uts46-hx')
function namehash (inputName) {
// Reject empty names:
var node = ''
for (var i = 0; i < 32; i++) {
node += '00'
}
name = normalize(inputName)
if (name) {
var labels = name.split('.')
for(var i = labels.length - 1; i >= 0; i--) {
var labelSha = sha3(labels[i])
node = sha3(new Buffer(node + labelSha, 'hex'))
}
}
return '0x' + node
}
function normalize(name) {
return name ? uts46.toUnicode(name, {useStd3ASCII: true, transitional: false}) : name
}
exports.hash = namehash
exports.normalize = normalize