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6 * holder information and the developer policies on copyright and licensing. *
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17 #include <cryptoconditions.h>
19 #include "primitives/block.h"
20 #include "primitives/transaction.h"
21 #include "script/cc.h"
24 #include "cc/CCinclude.h"
28 #include "crosschain.h"
32 struct CCcontract_info CCinfos[0x100];
34 bool RunCCEval(const CC *cond, const CTransaction &tx, unsigned int nIn)
36 // DISABLE CRYPTO CONDITIONS FOR NOW
40 bool out = eval->Dispatch(cond, tx, nIn);
41 //fprintf(stderr,"out %d vs %d isValid\n",(int32_t)out,(int32_t)eval->state.IsValid());
42 assert(eval->state.IsValid() == out);
44 if (eval->state.IsValid()) return true;
46 std::string lvl = eval->state.IsInvalid() ? "Invalid" : "Error!";
47 fprintf(stderr, "CC Eval %s %s: %s spending tx %s\n",
48 EvalToStr(cond->code[0]).data(),
50 eval->state.GetRejectReason().data(),
51 tx.vin[nIn].prevout.hash.GetHex().data());
52 if (eval->state.IsError()) fprintf(stderr, "Culprit: %s\n", EncodeHexTx(tx).data());
58 * Test the validity of an Eval node
60 bool Eval::Dispatch(const CC *cond, const CTransaction &txTo, unsigned int nIn)
62 struct CCcontract_info *cp;
63 if (cond->codeLength == 0)
64 return Invalid("empty-eval");
66 uint8_t ecode = cond->code[0];
67 cp = &CCinfos[(int32_t)ecode];
68 if ( cp->didinit == 0 )
73 std::vector<uint8_t> vparams(cond->code+1, cond->code+cond->codeLength);
76 case EVAL_IMPORTPAYOUT:
77 return ImportPayout(vparams, txTo, nIn);
81 return ImportCoin(vparams, txTo, nIn);
85 return(ProcessCC(cp,this, vparams, txTo, nIn));
88 return Invalid("invalid-code, dont forget to add EVAL_NEWCC to Eval::Dispatch");
92 bool Eval::GetSpendsConfirmed(uint256 hash, std::vector<CTransaction> &spends) const
99 bool Eval::GetTxUnconfirmed(const uint256 &hash, CTransaction &txOut, uint256 &hashBlock) const
101 bool myGetTransaction(const uint256 &hash, CTransaction &txOut, uint256 &hashBlock);
102 // there is a LOCK(cs_main) in the normal GetTransaction(), which leads to deadlocks
103 //bool fAllowSlow = false; // Don't allow slow
104 //return GetTransaction(hash, txOut, hashBlock, fAllowSlow);
105 return myGetTransaction(hash, txOut,hashBlock);
109 bool Eval::GetTxConfirmed(const uint256 &hash, CTransaction &txOut, CBlockIndex &block) const
112 if (!GetTxUnconfirmed(hash, txOut, hashBlock))
114 if (hashBlock.IsNull() || !GetBlock(hashBlock, block))
120 unsigned int Eval::GetCurrentHeight() const
122 return chainActive.Height();
125 bool Eval::GetBlock(uint256 hash, CBlockIndex& blockIdx) const
127 auto r = mapBlockIndex.find(hash);
128 if (r != mapBlockIndex.end()) {
129 blockIdx = *r->second;
132 fprintf(stderr, "CC Eval Error: Can't get block from index\n");
136 extern int32_t komodo_notaries(uint8_t pubkeys[64][33],int32_t height,uint32_t timestamp);
139 int32_t Eval::GetNotaries(uint8_t pubkeys[64][33], int32_t height, uint32_t timestamp) const
141 return komodo_notaries(pubkeys, height, timestamp);
145 bool Eval::CheckNotaryInputs(const CTransaction &tx, uint32_t height, uint32_t timestamp) const
147 if (tx.vin.size() < 11) return false;
149 uint8_t seenNotaries[64] = {0};
150 uint8_t notaries[64][33];
151 int nNotaries = GetNotaries(notaries, height, timestamp);
153 BOOST_FOREACH(const CTxIn &txIn, tx.vin)
158 if (!GetTxUnconfirmed(txIn.prevout.hash, tx, hashBlock)) return false;
159 if (tx.vout.size() < txIn.prevout.n) return false;
160 CScript spk = tx.vout[txIn.prevout.n].scriptPubKey;
161 if (spk.size() != 35) return false;
162 const unsigned char *pk = spk.data();
163 if (pk++[0] != 33) return false;
164 if (pk[33] != OP_CHECKSIG) return false;
166 // Check it's a notary
167 for (int i=0; i<nNotaries; i++) {
168 if (!seenNotaries[i]) {
169 if (memcmp(pk, notaries[i], 33) == 0) {
184 * Get MoM from a notarisation tx hash (on KMD)
186 bool Eval::GetNotarisationData(const uint256 notaryHash, NotarisationData &data) const
188 CTransaction notarisationTx;
190 if (!GetTxConfirmed(notaryHash, notarisationTx, block)) return false;
191 if (!CheckNotaryInputs(notarisationTx, block.nHeight, block.nTime)) return false;
192 if (!ParseNotarisationOpReturn(notarisationTx, data)) return false;
197 * Get MoMoM corresponding to a notarisation tx hash (on assetchain)
199 bool Eval::GetProofRoot(uint256 kmdNotarisationHash, uint256 &momom) const
201 std::pair<uint256,NotarisationData> out;
202 if (!GetNextBacknotarisation(kmdNotarisationHash, out)) return false;
203 momom = out.second.MoMoM;
208 uint32_t Eval::GetAssetchainsCC() const
210 return ASSETCHAINS_CC;
214 std::string Eval::GetAssetchainsSymbol() const
216 return std::string(ASSETCHAINS_SYMBOL);
221 * Notarisation data, ie, OP_RETURN payload in notarisation transactions
223 bool ParseNotarisationOpReturn(const CTransaction &tx, NotarisationData &data)
225 if (tx.vout.size() < 2) return false;
226 std::vector<unsigned char> vdata;
227 if (!GetOpReturnData(tx.vout[1].scriptPubKey, vdata)) return false;
228 bool out = E_UNMARSHAL(vdata, ss >> data);
236 std::string EvalToStr(EvalCode c)
238 FOREACH_EVAL(EVAL_GENERATE_STRING);
240 sprintf(s, "0x%x", c);
241 return std::string(s);
246 uint256 SafeCheckMerkleBranch(uint256 hash, const std::vector<uint256>& vMerkleBranch, int nIndex)
250 for (auto it(vMerkleBranch.begin()); it != vMerkleBranch.end(); ++it)
254 // non canonical. hash may be equal to node but never on the right.
257 hash = Hash(BEGIN(*it), END(*it), BEGIN(hash), END(hash));
260 hash = Hash(BEGIN(hash), END(hash), BEGIN(*it), END(*it));
267 uint256 GetMerkleRoot(const std::vector<uint256>& vLeaves)
270 std::vector<uint256> vMerkleTree;
271 return BuildMerkleTree(&fMutated, vLeaves, vMerkleTree);