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33 lines
635 B
JavaScript
33 lines
635 B
JavaScript
var sha3 = require('js-sha3').keccak_256
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var uts46 = require('idna-uts46-hx')
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function namehash (inputName) {
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// Reject empty names:
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var node = ''
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for (var i = 0; i < 32; i++) {
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node += '00'
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}
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var name = normalize(inputName)
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if (name) {
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var labels = name.split('.')
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for(var i = labels.length - 1; i >= 0; i--) {
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var labelSha = sha3(labels[i])
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node = sha3(new Buffer(node + labelSha, 'hex'))
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}
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}
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return '0x' + node
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}
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function normalize(name) {
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return name ? uts46.toUnicode(name, {useStd3ASCII: true, transitional: false}) : name
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}
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module.exports = {
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hash: namehash,
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normalize
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}
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