39 lines
765 B
JavaScript
39 lines
765 B
JavaScript
/**
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* Copyright (c) 2018-present, Facebook, Inc.
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*
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* This source code is licensed under the MIT license found in the
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* LICENSE file in the root directory of this source tree.
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*
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* @flow
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* @format
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*/
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'use strict';
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const crypto = require('crypto');
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function canonicalize(key: string, value: mixed): mixed {
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if (!(value instanceof Object) || value instanceof Array) {
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return value;
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}
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const keys = Object.keys(value).sort();
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const length = keys.length;
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const object = {};
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for (let i = 0; i < length; i++) {
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object[keys[i]] = value[keys[i]];
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}
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return object;
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}
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function stableHash(value: mixed) {
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return crypto
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.createHash('md4')
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.update(JSON.stringify(value, canonicalize))
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.digest();
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}
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module.exports = stableHash;
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