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https://github.com/jwinterm/myriadcoin.git
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OP_EVAL implementation
OP_EVAL is a new opcode that evaluates an item on the stack as a script. It enables a new type of bitcoin address that needs an arbitrarily complex script to redeem.
This commit is contained in:
Gavin Andresen
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#include <boost/assert.hpp>
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#include <boost/assign/list_of.hpp>
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#include <boost/assign/list_inserter.hpp>
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#include <boost/assign/std/vector.hpp>
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#include <boost/test/unit_test.hpp>
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#include <boost/foreach.hpp>
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#include "../main.h"
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#include "../script.h"
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#include "../wallet.h"
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using namespace std;
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// Test routines internal to script.cpp:
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extern uint256 SignatureHash(CScript scriptCode, const CTransaction& txTo, unsigned int nIn, int nHashType);
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extern bool VerifyScript(const CScript& scriptSig, const CScript& scriptPubKey, const CTransaction& txTo, unsigned int nIn, int& nSigOps, int nHashType);
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BOOST_AUTO_TEST_SUITE(script_op_eval_tests)
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BOOST_AUTO_TEST_CASE(script_op_eval1)
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{
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// OP_EVAL looks like this:
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// scriptSig: <sig> <sig...> <serialized_script>
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// scriptPubKey: DUP HASH160 <hash> EQUALVERIFY EVAL
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// Test SignSignature() (and therefore the version of Solver() that signs transactions)
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CBasicKeyStore keystore;
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CKey key[4];
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for (int i = 0; i < 4; i++)
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{
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key[i].MakeNewKey();
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keystore.AddKey(key[i]);
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}
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// 8 Scripts: checking all combinations of
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// different keys, straight/EVAL, pubkey/pubkeyhash
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CScript standardScripts[4];
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standardScripts[0] << key[0].GetPubKey() << OP_CHECKSIG;
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standardScripts[1].SetBitcoinAddress(key[1].GetPubKey());
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standardScripts[2] << key[1].GetPubKey() << OP_CHECKSIG;
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standardScripts[3].SetBitcoinAddress(key[2].GetPubKey());
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CScript evalScripts[4];
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uint160 sigScriptHashes[4];
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for (int i = 0; i < 4; i++)
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{
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sigScriptHashes[i] = Hash160(standardScripts[i]);
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keystore.AddCScript(sigScriptHashes[i], standardScripts[i]);
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evalScripts[i] << OP_DUP << OP_HASH160 << sigScriptHashes[i] << OP_EQUALVERIFY << OP_EVAL;
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}
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CTransaction txFrom; // Funding transaction:
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txFrom.vout.resize(8);
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for (int i = 0; i < 4; i++)
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{
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txFrom.vout[i].scriptPubKey = evalScripts[i];
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txFrom.vout[i+4].scriptPubKey = standardScripts[i];
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}
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BOOST_CHECK(txFrom.IsStandard());
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CTransaction txTo[8]; // Spending transactions
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for (int i = 0; i < 8; i++)
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{
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txTo[i].vin.resize(1);
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txTo[i].vout.resize(1);
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txTo[i].vin[0].prevout.n = i;
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txTo[i].vin[0].prevout.hash = txFrom.GetHash();
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txTo[i].vout[0].nValue = 1;
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BOOST_CHECK_MESSAGE(IsMine(keystore, txFrom.vout[i].scriptPubKey), strprintf("IsMine %d", i));
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}
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for (int i = 0; i < 8; i++)
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{
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BOOST_CHECK_MESSAGE(SignSignature(keystore, txFrom, txTo[i], 0), strprintf("SignSignature %d", i));
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}
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// All of the above should be OK, and the txTos have valid signatures
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// Check to make sure signature verification fails if we use the wrong ScriptSig:
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for (int i = 0; i < 8; i++)
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for (int j = 0; j < 8; j++)
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{
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CScript sigSave = txTo[i].vin[0].scriptSig;
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txTo[i].vin[0].scriptSig = txTo[j].vin[0].scriptSig;
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int nUnused = 0;
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bool sigOK = VerifySignature(txFrom, txTo[i], 0, nUnused);
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if (i == j)
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BOOST_CHECK_MESSAGE(sigOK, strprintf("VerifySignature %d %d", i, j));
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else
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BOOST_CHECK_MESSAGE(!sigOK, strprintf("VerifySignature %d %d", i, j));
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txTo[i].vin[0].scriptSig = sigSave;
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}
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}
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BOOST_AUTO_TEST_CASE(script_op_eval2)
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{
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// Test OP_EVAL edge cases
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CScript recurse;
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recurse << OP_DUP << OP_EVAL;
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uint160 recurseHash = Hash160(recurse);
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CScript fund;
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fund << OP_DUP << OP_HASH160 << recurseHash << OP_EQUALVERIFY << OP_EVAL;
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CTransaction txFrom; // Funding transaction:
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txFrom.vout.resize(1);
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txFrom.vout[0].scriptPubKey = fund;
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BOOST_CHECK(txFrom.IsStandard()); // Looks like a standard transaction until you try to spend it
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CTransaction txTo;
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txTo.vin.resize(1);
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txTo.vout.resize(1);
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txTo.vin[0].prevout.n = 0;
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txTo.vin[0].prevout.hash = txFrom.GetHash();
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txTo.vin[0].scriptSig = CScript() << static_cast<std::vector<unsigned char> >(recurse);
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txTo.vout[0].nValue = 1;
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int nUnused = 0;
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BOOST_CHECK(!VerifyScript(txTo.vin[0].scriptSig, txFrom.vout[0].scriptPubKey, txTo, 0, nUnused, 0));
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BOOST_CHECK(!VerifySignature(txFrom, txTo, 0, nUnused));
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}
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BOOST_AUTO_TEST_CASE(script_op_eval3)
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{
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// Test the CScript::Set* methods
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CBasicKeyStore keystore;
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CKey key[4];
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std::vector<CKey> keys;
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for (int i = 0; i < 4; i++)
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{
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key[i].MakeNewKey();
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keystore.AddKey(key[i]);
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keys.push_back(key[i]);
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}
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CScript inner[4];
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inner[0].SetBitcoinAddress(key[0].GetPubKey());
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inner[1].SetMultisig(2, std::vector<CKey>(keys.begin(), keys.begin()+2));
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inner[2].SetMultisig(1, std::vector<CKey>(keys.begin(), keys.begin()+2));
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inner[3].SetMultisig(2, std::vector<CKey>(keys.begin(), keys.begin()+3));
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CScript outer[4];
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for (int i = 0; i < 4; i++)
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{
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outer[i].SetEval(inner[i]);
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keystore.AddCScript(Hash160(inner[i]), inner[i]);
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}
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CTransaction txFrom; // Funding transaction:
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txFrom.vout.resize(4);
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for (int i = 0; i < 4; i++)
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{
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txFrom.vout[i].scriptPubKey = outer[i];
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}
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BOOST_CHECK(txFrom.IsStandard());
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CTransaction txTo[4]; // Spending transactions
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for (int i = 0; i < 4; i++)
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{
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txTo[i].vin.resize(1);
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txTo[i].vout.resize(1);
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txTo[i].vin[0].prevout.n = i;
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txTo[i].vin[0].prevout.hash = txFrom.GetHash();
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txTo[i].vout[0].nValue = 1;
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txTo[i].vout[0].scriptPubKey = inner[i];
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BOOST_CHECK_MESSAGE(IsMine(keystore, txFrom.vout[i].scriptPubKey), strprintf("IsMine %d", i));
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}
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for (int i = 0; i < 4; i++)
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{
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BOOST_CHECK_MESSAGE(SignSignature(keystore, txFrom, txTo[i], 0), strprintf("SignSignature %d", i));
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BOOST_CHECK_MESSAGE(txTo[i].IsStandard(), strprintf("txTo[%d].IsStandard", i));
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}
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}
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BOOST_AUTO_TEST_CASE(script_op_eval_backcompat)
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{
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// Check backwards-incompatibility-testing code
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CScript returnsEleven;
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returnsEleven << OP_11;
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// This will validate on new clients, but will
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// be invalid on old clients (that interpret OP_EVAL as a no-op)
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CScript fund;
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fund << OP_EVAL << OP_11 << OP_EQUAL;
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CTransaction txFrom; // Funding transaction:
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txFrom.vout.resize(1);
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txFrom.vout[0].scriptPubKey = fund;
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CTransaction txTo;
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txTo.vin.resize(1);
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txTo.vout.resize(1);
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txTo.vin[0].prevout.n = 0;
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txTo.vin[0].prevout.hash = txFrom.GetHash();
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txTo.vin[0].scriptSig = CScript() << static_cast<std::vector<unsigned char> >(returnsEleven);
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txTo.vout[0].nValue = 1;
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int nUnused = 0;
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BOOST_CHECK(!VerifyScript(txTo.vin[0].scriptSig, txFrom.vout[0].scriptPubKey, txTo, 0, nUnused, 0));
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BOOST_CHECK(!VerifySignature(txFrom, txTo, 0, nUnused));
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}
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BOOST_AUTO_TEST_SUITE_END()
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