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52 lines
1.3 KiB
52 lines
1.3 KiB
var assert = require('assert')
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var crypto = require('./crypto')
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var ecdsa = require('./ecdsa')
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var networks = require('./networks')
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var Address = require('./address')
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var ECPointFp = require('./ec').ECPointFp
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var sec = require('./sec')
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var ecparams = sec('secp256k1')
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function ECPubKey(Q, compressed) {
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assert(Q instanceof ECPointFp, 'Expected ECPointFP, got ' + Q)
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if (compressed == undefined) compressed = true
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assert.strictEqual(typeof compressed, 'boolean', 'Expected boolean, got ' + compressed)
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this.compressed = compressed
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this.Q = Q
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}
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// Static constructors
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ECPubKey.fromBuffer = function(buffer) {
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var decode = ECPointFp.decodeFrom(ecparams.getCurve(), buffer)
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return new ECPubKey(decode.Q, decode.compressed)
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}
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ECPubKey.fromHex = function(hex) {
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return ECPubKey.fromBuffer(new Buffer(hex, 'hex'))
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}
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// Operations
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ECPubKey.prototype.getAddress = function(version) {
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version = version || networks.bitcoin.pubKeyHash
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return new Address(crypto.hash160(this.toBuffer()), version)
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}
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ECPubKey.prototype.verify = function(hash, signature) {
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return ecdsa.verify(ecparams, hash, signature, this.Q)
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}
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// Export functions
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ECPubKey.prototype.toBuffer = function() {
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return this.Q.getEncoded(this.compressed)
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}
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ECPubKey.prototype.toHex = function() {
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return this.toBuffer().toString('hex')
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}
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module.exports = ECPubKey
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