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WIP donation via z_shieldcoinbase

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This commit is contained in:
Duke
2025-08-08 14:53:21 -04:00
parent 0df8a4595a
commit d95da694b9
2 changed files with 37 additions and 37 deletions
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65
src/wallet/asyncrpcoperation_shieldcoinbase.cpp
View File

@@ -161,24 +161,7 @@ void AsyncRPCOperation_shieldcoinbase::main() {
bool AsyncRPCOperation_shieldcoinbase::main_impl() {
CAmount minersFee = fee_;
size_t numInputs = inputs_.size();
/*
// Check mempooltxinputlimit to avoid creating a transaction which the local mempool rejects
size_t limit = (size_t)GetArg("-mempooltxinputlimit", 0);
{
LOCK(cs_main);
if (NetworkUpgradeActive(chainActive.Height() + 1, Params().GetConsensus(), Consensus::UPGRADE_OVERWINTER)) {
limit = 0;
}
}
if (limit>0 && numInputs > limit) {
throw JSONRPCError(RPC_WALLET_ERROR,
strprintf("Number of inputs %d is greater than mempooltxinputlimit of %d",
numInputs, limit));
}
*/
size_t numInputs = inputs_.size();
CAmount targetAmount = 0;
for (ShieldCoinbaseUTXO & utxo : inputs_) {
@@ -192,10 +175,12 @@ bool AsyncRPCOperation_shieldcoinbase::main_impl() {
}
CAmount sendAmount = targetAmount - minersFee;
LogPrint("zrpc", "%s: spending %s to shield %s with fee %s\n",
LogPrint("zrpc", "%s: spending %s to shield %s with fee %s, donation=%d\n",
getId(), FormatMoney(targetAmount), FormatMoney(sendAmount), FormatMoney(minersFee));
return boost::apply_visitor(ShieldToAddress(this, sendAmount), tozaddr_);
//TODO: pass this in from RPC
CAmount donation = 2;
return boost::apply_visitor(ShieldToAddress(this, sendAmount, donation), tozaddr_);
}
extern UniValue signrawtransaction(const UniValue& params, bool fHelp, const CPubKey& mypk);
@@ -229,19 +214,37 @@ bool ShieldToAddress::operator()(const libzcash::SaplingPaymentAddress &zaddr) c
}
}
//TODO: if donation==true, send X% of value to zaddr and Y% of of value to donatezaddr
// Send all value to the target z-addr
m_op->builder_.SendChangeTo(zaddr, ovk);
if(donation) {
// add original recipient as first output
m_op->builder_.AddSaplingOutput(ovk, zaddr, sendAmount);
CAmount donationAmount = 0; //TODO calculate exact donation amount in puposhis
// donation recipient as second output
m_op->builder_.AddSaplingOutput(ovk, donationZaddr, donationAmount);
// zdust as third output, so donation txs are indistinguishable from
// non-donation z_shieldcoinbase txs
auto zdust1 = DecodePaymentAddress(randomSietchZaddr());
auto sietchZout1 = boost::get<libzcash::SaplingPaymentAddress>(zdust1);
m_op->builder_.AddSaplingOutput(ovk, sietchZout1, 0);
} else {
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);
}
// 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
auto maybe_tx = m_op->builder_.Build();

9
src/wallet/asyncrpcoperation_shieldcoinbase.h
View File

@@ -63,7 +63,6 @@ public:
virtual UniValue getStatus() const;
bool testmode = false; // Set to true to disable sending txs and generating proofs
bool cheatSpend = false; // set when this is shielding a cheating coinbase
private:
friend class ShieldToAddress;
@@ -96,15 +95,15 @@ class ShieldToAddress : public boost::static_visitor<bool>
private:
AsyncRPCOperation_shieldcoinbase *m_op;
CAmount sendAmount;
CAmount donation = 0;
public:
ShieldToAddress(AsyncRPCOperation_shieldcoinbase *op, CAmount sendAmount) :
m_op(op), sendAmount(sendAmount) {}
ShieldToAddress(AsyncRPCOperation_shieldcoinbase *op, CAmount sendAmount, bool donation) :
m_op(op), sendAmount(sendAmount), donation(donation) {}
bool operator()(const libzcash::SaplingPaymentAddress &zaddr) const;
bool operator()(const libzcash::InvalidEncoding& no) const;
};
// To test private methods, a friend class can act as a proxy
class TEST_FRIEND_AsyncRPCOperation_shieldcoinbase {
public:
@@ -135,6 +134,4 @@ public:
}
};
#endif /* ASYNCRPCOPERATION_SHIELDCOINBASE_H */