70 lines
1.8 KiB
JavaScript
70 lines
1.8 KiB
JavaScript
var StealthAddress = require('./stealthaddress');
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var StealthKey = require('./stealthkey');
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var Transaction = require('../transaction');
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var Pubkey = require('../pubkey');
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var StealthTx = function StealthTx(tx, sa, sk) {
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if (!(this instanceof StealthTx))
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return new StealthTx(tx, sa, sk);
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if (tx instanceof Transaction) {
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this.tx = tx;
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this.sa = sa;
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this.sk = sk;
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} else if (tx) {
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var obj = tx;
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this.set(obj);
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}
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};
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StealthTx.prototype.set = function(obj) {
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this.sk = obj.sk || this.sk;
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this.sa = obj.sa || this.sa;
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this.tx = obj.tx || this.tx;
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return this;
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};
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StealthTx.prototype.isForMe = function() {
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if (!this.notMine())
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return true;
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else
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return false;
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};
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StealthTx.prototype.notMine = function() {
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var err;
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if (err = this.notStealth())
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return "Not stealth: " + err;
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var txopbuf = this.tx.txouts[0].script.chunks[1].buf;
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var parsed = StealthTx.parseOpReturnData(txopbuf);
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var pubkey = parsed.pubkey;
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var pubkeyhashbuf = this.tx.txouts[1].script.chunks[2].buf;
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var sk = this.sk;
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if (sk.isForMe(pubkey, pubkeyhashbuf)) {
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return false;
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} else {
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return "StealthTx not mine";
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}
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};
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//For now, we only support a very limited variety of stealth tx
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StealthTx.prototype.notStealth = function() {
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var txouts = this.tx.txouts;
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if (!(txouts.length >= 2))
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return "Not enough txouts";
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if (!txouts[0].script.isOpReturn())
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return "First txout is not OP_RETURN";
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if (!txouts[1].script.isPubkeyhashOut())
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return "Second txout is not pubkeyhash";
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return false;
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};
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StealthTx.parseOpReturnData = function(buf) {
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var parsed = {};
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parsed.version = buf[0];
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parsed.noncebuf = buf.slice(1, 5);
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parsed.pubkey = Pubkey().fromBuffer(buf.slice(5, 5 + 33));
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return parsed;
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};
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module.exports = StealthTx;
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