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Sietch for z_shieldcoinbase

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This commit is contained in:
Duke Leto
2021-06-27 22:19:37 -04:00
parent cfad609a2f
commit 195af2c65a
1 changed files with 12 additions and 0 deletions
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12
src/wallet/asyncrpcoperation_shieldcoinbase.cpp
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@@ -46,6 +46,7 @@
using namespace libzcash; using namespace libzcash;
extern uint64_t ASSETCHAINS_TIMELOCKGTE; extern uint64_t ASSETCHAINS_TIMELOCKGTE;
extern string randomSietchZaddr();
AsyncRPCOperation_shieldcoinbase::AsyncRPCOperation_shieldcoinbase( AsyncRPCOperation_shieldcoinbase::AsyncRPCOperation_shieldcoinbase(
TransactionBuilder builder, TransactionBuilder builder,
@@ -229,6 +230,17 @@ bool ShieldToAddress::operator()(const libzcash::SaplingPaymentAddress &zaddr) c
// Send all value to the target z-addr // Send all value to the target z-addr
m_op->builder_.SendChangeTo(zaddr, ovk); m_op->builder_.SendChangeTo(zaddr, ovk);
// Sietchified Shielding of Coinbase Funds
// Add Sietch zouts so it's unclear which zout contains value :)
// This reduces metadata leakage of coinbase t=>z tx's
CAmount amount = 0;
auto zdust1 = DecodePaymentAddress(randomSietchZaddr());
auto zdust2 = DecodePaymentAddress(randomSietchZaddr());
auto sietchZout1 = boost::get<libzcash::SaplingPaymentAddress>(zdust1);
auto sietchZout2 = boost::get<libzcash::SaplingPaymentAddress>(zdust2);
m_op->builder_.AddSaplingOutput(ovk, sietchZout1, amount);
m_op->builder_.AddSaplingOutput(ovk, sietchZout2, amount);
// Build the transaction // Build the transaction
auto maybe_tx = m_op->builder_.Build(); auto maybe_tx = m_op->builder_.Build();
if (!maybe_tx) { if (!maybe_tx) {