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add ScriptInterpreter#verify docs

This commit is contained in:
Manuel Araoz 2014-12-16 17:39:44 -03:00
parent 8eb7b010ea
commit d56fb04575
2 changed files with 21 additions and 6 deletions
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13
lib/script_interpreter.js
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@ -1045,6 +1045,16 @@ ScriptInterpreter.prototype.step = function() {
}
/**
* Verifies a Script by executing it and returns true if it is valid.
* This function needs to be provided with the scriptSig and the scriptPubkey
* separately.
* @param {Script} scriptSig - the script's first part (corresponding to the tx input)
* @param {Script} scriptPubkey - the script's last part (corresponding to the tx output)
* @param {Transaction} [tx] - the Transaction containing the scriptSig in one input (used
* to check signature validity for some opcodes like OP_CHECKSIG)
* @param {number} nin - index of the transaction input containing the scriptSig verified.
* @param {number} flags - evaluation flags. See ScriptInterpreter.SCRIPT_* constants
*
* Translated from bitcoind's VerifyScript
*/
ScriptInterpreter.prototype.verify = function(scriptSig, scriptPubkey, tx, nin, flags) {
@ -1054,6 +1064,9 @@ ScriptInterpreter.prototype.verify = function(scriptSig, scriptPubkey, tx, nin,
if (_.isUndefined(nin)) {
nin = 0;
}
if (_.isUndefined(flags)) {
flags = 0;
}
this.set({
script: scriptSig,
tx: tx,

14
test/script_interpreter.js
View File

@ -202,7 +202,7 @@ describe('ScriptInterpreter', function() {
var verified = interp.verify(scriptSig, scriptPubkey, spendtx, 0, flags);
verified.should.equal(expected);
};
describe('bitcoind fixtures', function() {
describe('bitcoind script evaluation fixtures', function() {
var testAllFixtures = function(set, expected) {
var c = 0;
set.forEach(function(vector) {
@ -221,13 +221,15 @@ describe('ScriptInterpreter', function() {
testAllFixtures(script_valid, true);
testAllFixtures(script_invalid, false);
});
describe.only('bitcoind transaction evaluation fixtures', function() {
var c = 0;
tx_valid.forEach(function(vector) {
if (vector.length === 1) {
return;
}
c++;
it.skip('should pass tx_valid vector ' + c, function() {
it('should pass tx_valid vector ' + c, function() {
var inputs = vector[0];
var txhex = vector[1];
var flags = getFlags(vector[2]);
@ -240,18 +242,18 @@ describe('ScriptInterpreter', function() {
if (txoutnum === -1) {
txoutnum = 0xffffffff; //bitcoind casts -1 to an unsigned int
}
var txkey = txid + ':' + txoutnum;
map[txkey] = Script.fromBitcoindString(scriptPubKeyStr);
map[txid + ':' + txoutnum] = Script.fromBitcoindString(scriptPubKeyStr);
});
var tx = Transaction(txhex);
tx.inputs.forEach(function(txin, j) {
console.log('input ' + j);
var scriptSig = txin.script;
var txidhex = txin.prevTxId.toString('hex');
var txoutnum = txin.outputIndex;
var txkey = txidhex + ':' + txoutnum;
var scriptPubkey = map[txkey];
var scriptPubkey = map[txidhex + ':' + txoutnum];
should.exist(scriptPubkey);
should.exist(scriptSig);
var interp = ScriptInterpreter();
var verified = interp.verify(scriptSig, scriptPubkey, tx, j, flags);
verified.should.equal(true);