6fb8a4641a
- replacing new Buffer(int) to Buffer.alloc(int)
- replacing new Buffer('string' [, 'encoding']) to Buffer.from('string' [, 'encoding'])
49 lines
1.4 KiB
JavaScript
49 lines
1.4 KiB
JavaScript
'use strict';
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function Encoding(servicePrefix) {
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this._servicePrefix = servicePrefix;
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this._blockPrefix = Buffer.from('00', 'hex');
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this._timestampPrefix = Buffer.from('01', 'hex');
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}
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// ---- block hash -> timestamp
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Encoding.prototype.encodeBlockTimestampKey = function(hash) {
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return Buffer.concat([this._servicePrefix, this._blockPrefix, Buffer.from(hash, 'hex')]);
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};
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Encoding.prototype.decodeBlockTimestampKey = function(buffer) {
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return buffer.slice(3).toString('hex');
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};
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Encoding.prototype.encodeBlockTimestampValue = function(timestamp) {
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var timestampBuffer = Buffer.alloc(4);
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timestampBuffer.writeUInt32BE(timestamp);
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return timestampBuffer;
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};
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Encoding.prototype.decodeBlockTimestampValue = function(buffer) {
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return buffer.readUInt32BE();
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};
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// ---- timestamp -> block hash
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Encoding.prototype.encodeTimestampBlockKey = function(timestamp) {
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var timestampBuffer = Buffer.alloc(4);
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timestampBuffer.writeUInt32BE(timestamp);
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return Buffer.concat([this._servicePrefix, this._timestampPrefix, timestampBuffer]);
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};
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Encoding.prototype.decodeTimestampBlockKey = function(buffer) {
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return buffer.readUInt32BE(3);
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};
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Encoding.prototype.encodeTimestampBlockValue = function(hash) {
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return Buffer.from(hash, 'hex');
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};
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Encoding.prototype.decodeTimestampBlockValue = function(buffer) {
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return buffer.toString('hex');
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};
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module.exports = Encoding;
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