28 lines
1.2 KiB
JavaScript
28 lines
1.2 KiB
JavaScript
'use strict';
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Object.defineProperty(exports, "__esModule", { value: true });
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var bytes_1 = require("./bytes");
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var utf8_1 = require("./utf8");
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var keccak256_1 = require("./keccak256");
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var Zeros = new Uint8Array([0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0]);
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var Partition = new RegExp("^((.*)\\.)?([^.]+)$");
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var UseSTD3ASCIIRules = new RegExp("^[a-z0-9.-]*$");
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function namehash(name) {
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name = name.toLowerCase();
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// Supporting the full UTF-8 space requires additional (and large)
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// libraries, so for now we simply do not support them.
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// It should be fairly easy in the future to support systems with
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// String.normalize, but that is future work.
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if (!name.match(UseSTD3ASCIIRules)) {
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throw new Error('contains invalid UseSTD3ASCIIRules characters');
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}
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var result = Zeros;
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while (name.length) {
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var partition = name.match(Partition);
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var label = utf8_1.toUtf8Bytes(partition[3]);
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result = keccak256_1.keccak256(bytes_1.concat([result, keccak256_1.keccak256(label)]));
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name = partition[2] || '';
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}
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return bytes_1.hexlify(result);
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}
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exports.namehash = namehash;
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