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plug bulletproofs plus into consensus

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moneromooo-monero 2020-12-17 11:57:53 +00:00
parent b535d662b9
commit a0d80b1f95
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GPG key ID: 686F07454D6CEFC3
28 changed files with 1139 additions and 161 deletions
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47
src/cryptonote_basic/cryptonote_format_utils.cpp
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@ -105,7 +105,9 @@ namespace cryptonote
uint64_t get_transaction_weight_clawback(const transaction &tx, size_t n_padded_outputs)
{
const uint64_t bp_base = 368;
const rct::rctSig &rv = tx.rct_signatures;
const bool plus = rv.type == rct::RCTTypeBulletproofPlus;
const uint64_t bp_base = (32 * ((plus ? 6 : 9) + 7 * 2)) / 2; // notional size of a 2 output proof, normalized to 1 proof (ie, divided by 2)
const size_t n_outputs = tx.vout.size();
if (n_padded_outputs <= 2)
return 0;
@ -113,7 +115,7 @@ namespace cryptonote
while ((1u << nlr) < n_padded_outputs)
++nlr;
nlr += 6;
const size_t bp_size = 32 * (9 + 2 * nlr);
const size_t bp_size = 32 * ((plus ? 6 : 9) + 2 * nlr);
CHECK_AND_ASSERT_THROW_MES_L1(n_outputs <= BULLETPROOF_MAX_OUTPUTS, "maximum number of outputs is " + std::to_string(BULLETPROOF_MAX_OUTPUTS) + " per transaction");
CHECK_AND_ASSERT_THROW_MES_L1(bp_base * n_padded_outputs >= bp_size, "Invalid bulletproof clawback: bp_base " + std::to_string(bp_base) + ", n_padded_outputs "
+ std::to_string(n_padded_outputs) + ", bp_size " + std::to_string(bp_size));
@ -164,7 +166,32 @@ namespace cryptonote
if (!base_only)
{
const bool bulletproof = rct::is_rct_bulletproof(rv.type);
if (bulletproof)
const bool bulletproof_plus = rct::is_rct_bulletproof_plus(rv.type);
if (bulletproof_plus)
{
if (rv.p.bulletproofs_plus.size() != 1)
{
LOG_PRINT_L1("Failed to parse transaction from blob, bad bulletproofs_plus size in tx " << get_transaction_hash(tx));
return false;
}
if (rv.p.bulletproofs_plus[0].L.size() < 6)
{
LOG_PRINT_L1("Failed to parse transaction from blob, bad bulletproofs_plus L size in tx " << get_transaction_hash(tx));
return false;
}
const size_t max_outputs = rct::n_bulletproof_plus_max_amounts(rv.p.bulletproofs_plus[0]);
if (max_outputs < tx.vout.size())
{
LOG_PRINT_L1("Failed to parse transaction from blob, bad bulletproofs_plus max outputs in tx " << get_transaction_hash(tx));
return false;
}
const size_t n_amounts = tx.vout.size();
CHECK_AND_ASSERT_MES(n_amounts == rv.outPk.size(), false, "Internal error filling out V");
rv.p.bulletproofs_plus[0].V.resize(n_amounts);
for (size_t i = 0; i < n_amounts; ++i)
rv.p.bulletproofs_plus[0].V[i] = rct::scalarmultKey(rv.outPk[i].mask, rct::INV_EIGHT);
}
else if (bulletproof)
{
if (rv.p.bulletproofs.size() != 1)
{
@ -419,9 +446,11 @@ namespace cryptonote
if (tx.version < 2)
return blob_size;
const rct::rctSig &rv = tx.rct_signatures;
if (!rct::is_rct_bulletproof(rv.type))
const bool bulletproof = rct::is_rct_bulletproof(rv.type);
const bool bulletproof_plus = rct::is_rct_bulletproof_plus(rv.type);
if (!bulletproof && !bulletproof_plus)
return blob_size;
const size_t n_padded_outputs = rct::n_bulletproof_max_amounts(rv.p.bulletproofs);
const size_t n_padded_outputs = bulletproof_plus ? rct::n_bulletproof_plus_max_amounts(rv.p.bulletproofs_plus) : rct::n_bulletproof_max_amounts(rv.p.bulletproofs);
uint64_t bp_clawback = get_transaction_weight_clawback(tx, n_padded_outputs);
CHECK_AND_ASSERT_THROW_MES_L1(bp_clawback <= std::numeric_limits<uint64_t>::max() - blob_size, "Weight overflow");
return blob_size + bp_clawback;
@ -431,8 +460,8 @@ namespace cryptonote
{
CHECK_AND_ASSERT_MES(tx.pruned, std::numeric_limits<uint64_t>::max(), "get_pruned_transaction_weight does not support non pruned txes");
CHECK_AND_ASSERT_MES(tx.version >= 2, std::numeric_limits<uint64_t>::max(), "get_pruned_transaction_weight does not support v1 txes");
CHECK_AND_ASSERT_MES(tx.rct_signatures.type >= rct::RCTTypeBulletproof2 || tx.rct_signatures.type == rct::RCTTypeCLSAG,
std::numeric_limits<uint64_t>::max(), "get_pruned_transaction_weight does not support older range proof types");
CHECK_AND_ASSERT_MES(tx.rct_signatures.type == rct::RCTTypeBulletproof2 || tx.rct_signatures.type == rct::RCTTypeCLSAG || tx.rct_signatures.type == rct::RCTTypeBulletproofPlus,
std::numeric_limits<uint64_t>::max(), "Unsupported rct_signatures type in get_pruned_transaction_weight");
CHECK_AND_ASSERT_MES(!tx.vin.empty(), std::numeric_limits<uint64_t>::max(), "empty vin");
CHECK_AND_ASSERT_MES(tx.vin[0].type() == typeid(cryptonote::txin_to_key), std::numeric_limits<uint64_t>::max(), "empty vin");
@ -450,12 +479,12 @@ namespace cryptonote
while ((n_padded_outputs = (1u << nrl)) < tx.vout.size())
++nrl;
nrl += 6;
extra = 32 * (9 + 2 * nrl) + 2;
extra = 32 * ((rct::is_rct_bulletproof_plus(tx.rct_signatures.type) ? 6 : 9) + 2 * nrl) + 2;
weight += extra;
// calculate deterministic CLSAG/MLSAG data size
const size_t ring_size = boost::get<cryptonote::txin_to_key>(tx.vin[0]).key_offsets.size();
if (tx.rct_signatures.type == rct::RCTTypeCLSAG)
if (rct::is_rct_clsag(tx.rct_signatures.type))
extra = tx.vin.size() * (ring_size + 2) * 32;
else
extra = tx.vin.size() * (ring_size * (1 + 1) * 32 + 32 /* cc */);