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CA: Add implementation of asset derivation functions.

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Mark Friedenbach 2017-02-22 14:19:19 -08:00 • committed by Gregory Sanders
parent 513eb8b82e
commit cc4c550286
1 changed files with 43 additions and 0 deletions
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43
src/main.cpp
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@ -2466,6 +2466,49 @@ bool CheckTxInputs(const CTransaction& tx, CValidationState& state, const CCoins
}
}// namespace Consensus
void GenerateAssetEntropy(uint256& entropy, const COutPoint& prevout, const uint256& contracthash)
{
// E : entropy
// I : prevout
// C : contract
// E = H( H(I) || H(C) )
std::vector<uint256> leaves;
leaves.reserve(2);
leaves.push_back(SerializeHash(prevout, SER_GETHASH, 0));
leaves.push_back(contracthash);
entropy = ComputeFastMerkleRoot(leaves);
}
void CalculateAssetID(uint256& assetID, const uint256& entropy)
{
static const uint256 kZero = uint256S("0x0000000000000000000000000000000000000000000000000000000000000000");
// H_a : asset tag
// E : entropy
// H_a = H( E || 0 )
std::vector<uint256> leaves;
leaves.reserve(2);
leaves.push_back(entropy);
leaves.push_back(kZero);
assetID = ComputeFastMerkleRoot(leaves);
}
void CalculateReissuanceToken(uint256& reissuanceTokenID, const uint256& entropy, bool fConfidential)
{
static const uint256 kOne = uint256S("0x0000000000000000000000000000000000000000000000000000000000000001");
static const uint256 kTwo = uint256S("0x0000000000000000000000000000000000000000000000000000000000000002");
// H_a : asset reissuance tag
// E : entropy
// if not fConfidential:
// H_a = H( E || 1 )
// else
// H_a = H( E || 2 )
std::vector<uint256> leaves;
leaves.reserve(2);
leaves.push_back(entropy);
leaves.push_back(fConfidential? kTwo: kOne);
reissuanceTokenID = ComputeFastMerkleRoot(leaves);
}
bool CheckInputs(const CTransaction& tx, CValidationState &state, const CCoinsViewCache &inputs, bool fScriptChecks, unsigned int flags, bool cacheStore, PrecomputedTransactionData& txdata, set<pair<uint256, COutPoint> >& setWithdrawsSpent, std::vector<CCheck*> *pvChecks)
{
if (!tx.IsCoinBase())