51 lines
1.4 KiB
JavaScript
51 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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}
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// ---- hash --> height
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Encoding.prototype.encodeHeaderKey = function(hash) {
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return Buffer.concat([ this._servicePrefix, new Buffer(hash, 'hex') ]);
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};
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Encoding.prototype.decodeHeaderKey = function(buffer) {
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return buffer.slice(3).toString('hex');
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};
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Encoding.prototype.encodeHeaderValue = function(header) {
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var versionBuf = new Buffer(4);
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versionBuf.writeInt32BE(header.version);
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var prevHash = new Buffer(header.prevHash, 'hex');
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var merkleRoot = new Buffer(header.merkleRoot, 'hex');
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var tsBuf = new Buffer(4);
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tsBuf.writeUInt32BE(header.timestamp);
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var bitsBuf = new Buffer(4);
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bitsBuf.writeUInt32BE(header.bits);
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var nonceBuf = new Buffer(4);
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nonceBuf.writeUInt32BE(header.nonce);
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return Buffer.concat([ versionBuf, prevHash, merkleRoot, tsBuf, bitsBuf, nonceBuf ]);
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};
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Encoding.prototype.decodeHeaderValue = function(buffer) {
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var version = buffer.readInt32BE();
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var prevHash = buffer.slice(4, 36).toString('hex');
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var merkleRoot = buffer.slice(36, 68).toString('hex');
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var ts = buffer.readUInt32BE(68);
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var bits = buffer.readUInt32BE(72);
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var nonce = buffer.readUInt32BE(76);
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return {
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version: version,
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prevHash: prevHash,
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merkleRoot: merkleRoot,
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timestakmp: ts,
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bits: bits,
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nonce: nonce
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};
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};
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module.exports = Encoding;
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