Implement basic Sapling v4 transaction parser
Details of Sapling datatypes will be filled in later; for now, they are treated
as binary blobs.
Includes code cherry-picked from upstream commit:
7030d9eb47254499bba14f1c00abc6bf493efd91
BIP144: Serialization, hashes, relay (sender side)
This commit is contained in:
Jack Grigg
@@ -72,23 +72,50 @@ JSDescription JSDescription::Randomized(
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);
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}
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class SproutProofVerifier : public boost::static_visitor<bool>
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{
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ZCJoinSplit& params;
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libzcash::ProofVerifier& verifier;
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const uint256& pubKeyHash;
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const JSDescription& jsdesc;
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public:
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SproutProofVerifier(
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ZCJoinSplit& params,
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libzcash::ProofVerifier& verifier,
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const uint256& pubKeyHash,
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const JSDescription& jsdesc
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) : params(params), jsdesc(jsdesc), verifier(verifier), pubKeyHash(pubKeyHash) {}
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bool operator()(const libzcash::ZCProof& proof) const
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{
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return params.verify(
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proof,
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verifier,
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pubKeyHash,
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jsdesc.randomSeed,
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jsdesc.macs,
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jsdesc.nullifiers,
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jsdesc.commitments,
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jsdesc.vpub_old,
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jsdesc.vpub_new,
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jsdesc.anchor
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);
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}
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bool operator()(const libzcash::GrothProof& proof) const
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{
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return false;
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}
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};
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bool JSDescription::Verify(
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ZCJoinSplit& params,
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libzcash::ProofVerifier& verifier,
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const uint256& pubKeyHash
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) const {
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return params.verify(
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proof,
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verifier,
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pubKeyHash,
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randomSeed,
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macs,
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nullifiers,
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commitments,
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vpub_old,
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vpub_new,
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anchor
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);
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auto pv = SproutProofVerifier(params, verifier, pubKeyHash, *this);
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boost::apply_visitor(pv, proof);
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}
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uint256 JSDescription::h_sig(ZCJoinSplit& params, const uint256& pubKeyHash) const
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@@ -146,10 +173,12 @@ std::string CTxOut::ToString() const
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return strprintf("CTxOut(nValue=%d.%08d, scriptPubKey=%s)", nValue / COIN, nValue % COIN, HexStr(scriptPubKey).substr(0, 30));
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}
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CMutableTransaction::CMutableTransaction() : nVersion(CTransaction::SPROUT_MIN_CURRENT_VERSION), fOverwintered(false), nVersionGroupId(0), nExpiryHeight(0), nLockTime(0) {}
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CMutableTransaction::CMutableTransaction() : nVersion(CTransaction::SPROUT_MIN_CURRENT_VERSION), fOverwintered(false), nVersionGroupId(0), nExpiryHeight(0), nLockTime(0), valueBalance(0) {}
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CMutableTransaction::CMutableTransaction(const CTransaction& tx) : nVersion(tx.nVersion), fOverwintered(tx.fOverwintered), nVersionGroupId(tx.nVersionGroupId), nExpiryHeight(tx.nExpiryHeight),
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vin(tx.vin), vout(tx.vout), nLockTime(tx.nLockTime),
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vjoinsplit(tx.vjoinsplit), joinSplitPubKey(tx.joinSplitPubKey), joinSplitSig(tx.joinSplitSig)
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valueBalance(tx.valueBalance), vShieldedSpend(tx.vShieldedSpend), vShieldedOutput(tx.vShieldedOutput),
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vjoinsplit(tx.vjoinsplit), joinSplitPubKey(tx.joinSplitPubKey), joinSplitSig(tx.joinSplitSig),
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bindingSig(tx.bindingSig)
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{
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}
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@@ -164,11 +193,13 @@ void CTransaction::UpdateHash() const
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*const_cast<uint256*>(&hash) = SerializeHash(*this);
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}
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CTransaction::CTransaction() : nVersion(CTransaction::SPROUT_MIN_CURRENT_VERSION), fOverwintered(false), nVersionGroupId(0), nExpiryHeight(0), vin(), vout(), nLockTime(0), vjoinsplit(), joinSplitPubKey(), joinSplitSig() { }
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CTransaction::CTransaction() : nVersion(CTransaction::SPROUT_MIN_CURRENT_VERSION), fOverwintered(false), nVersionGroupId(0), nExpiryHeight(0), vin(), vout(), nLockTime(0), valueBalance(0), vShieldedSpend(), vShieldedOutput(), vjoinsplit(), joinSplitPubKey(), joinSplitSig(), bindingSig() { }
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CTransaction::CTransaction(const CMutableTransaction &tx) : nVersion(tx.nVersion), fOverwintered(tx.fOverwintered), nVersionGroupId(tx.nVersionGroupId), nExpiryHeight(tx.nExpiryHeight),
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vin(tx.vin), vout(tx.vout), nLockTime(tx.nLockTime),
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vjoinsplit(tx.vjoinsplit), joinSplitPubKey(tx.joinSplitPubKey), joinSplitSig(tx.joinSplitSig)
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valueBalance(tx.valueBalance), vShieldedSpend(tx.vShieldedSpend), vShieldedOutput(tx.vShieldedOutput),
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vjoinsplit(tx.vjoinsplit), joinSplitPubKey(tx.joinSplitPubKey), joinSplitSig(tx.joinSplitSig),
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bindingSig(tx.bindingSig)
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{
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UpdateHash();
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}
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@@ -179,13 +210,17 @@ CTransaction::CTransaction(
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const CMutableTransaction &tx,
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bool evilDeveloperFlag) : nVersion(tx.nVersion), fOverwintered(tx.fOverwintered), nVersionGroupId(tx.nVersionGroupId), nExpiryHeight(tx.nExpiryHeight),
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vin(tx.vin), vout(tx.vout), nLockTime(tx.nLockTime),
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vjoinsplit(tx.vjoinsplit), joinSplitPubKey(tx.joinSplitPubKey), joinSplitSig(tx.joinSplitSig)
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valueBalance(tx.valueBalance), vShieldedSpend(tx.vShieldedSpend), vShieldedOutput(tx.vShieldedOutput),
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vjoinsplit(tx.vjoinsplit), joinSplitPubKey(tx.joinSplitPubKey), joinSplitSig(tx.joinSplitSig),
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bindingSig(tx.bindingSig)
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{
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assert(evilDeveloperFlag);
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}
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CTransaction::CTransaction(CMutableTransaction &&tx) : nVersion(tx.nVersion), fOverwintered(tx.fOverwintered), nVersionGroupId(tx.nVersionGroupId),
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vin(std::move(tx.vin)), vout(std::move(tx.vout)), nLockTime(tx.nLockTime), nExpiryHeight(tx.nExpiryHeight),
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valueBalance(tx.valueBalance),
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vShieldedSpend(std::move(tx.vShieldedSpend)), vShieldedOutput(std::move(tx.vShieldedOutput)),
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vjoinsplit(std::move(tx.vjoinsplit)),
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joinSplitPubKey(std::move(tx.joinSplitPubKey)), joinSplitSig(std::move(tx.joinSplitSig))
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{
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@@ -200,9 +235,13 @@ CTransaction& CTransaction::operator=(const CTransaction &tx) {
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*const_cast<std::vector<CTxOut>*>(&vout) = tx.vout;
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*const_cast<unsigned int*>(&nLockTime) = tx.nLockTime;
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*const_cast<uint32_t*>(&nExpiryHeight) = tx.nExpiryHeight;
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*const_cast<CAmount*>(&valueBalance) = tx.valueBalance;
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*const_cast<std::vector<SpendDescription>*>(&vShieldedSpend) = tx.vShieldedSpend;
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*const_cast<std::vector<OutputDescription>*>(&vShieldedOutput) = tx.vShieldedOutput;
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*const_cast<std::vector<JSDescription>*>(&vjoinsplit) = tx.vjoinsplit;
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*const_cast<uint256*>(&joinSplitPubKey) = tx.joinSplitPubKey;
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*const_cast<joinsplit_sig_t*>(&joinSplitSig) = tx.joinSplitSig;
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*const_cast<binding_sig_t*>(&bindingSig) = tx.bindingSig;
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*const_cast<uint256*>(&hash) = tx.hash;
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return *this;
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}
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@@ -279,6 +318,19 @@ std::string CTransaction::ToString() const
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vin.size(),
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vout.size(),
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nLockTime);
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} else if (nVersion >= SAPLING_MIN_TX_VERSION) {
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str += strprintf("CTransaction(hash=%s, ver=%d, fOverwintered=%d, nVersionGroupId=%08x, vin.size=%u, vout.size=%u, nLockTime=%u, nExpiryHeight=%u, valueBalance=%u, vShieldedSpend.size=%u, vShieldedOutput.size=%u)\n",
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GetHash().ToString().substr(0,10),
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nVersion,
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fOverwintered,
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nVersionGroupId,
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vin.size(),
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vout.size(),
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nLockTime,
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nExpiryHeight,
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valueBalance,
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vShieldedSpend.size(),
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vShieldedOutput.size());
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} else if (nVersion >= 3) {
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str += strprintf("CTransaction(hash=%s, ver=%d, fOverwintered=%d, nVersionGroupId=%08x, vin.size=%u, vout.size=%u, nLockTime=%u, nExpiryHeight=%u)\n",
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GetHash().ToString().substr(0,10),
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