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node: Refactor BroadcastTransaction to accept a CFeeRate maximum

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This commit is contained in:
Luke Dashjr 2023-09-05 02:10:58 +00:00
parent 4b3cc3d48e
commit 1cee5b1ac7
4 changed files with 19 additions and 7 deletions
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3
src/interfaces/node.h
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@ -20,6 +20,7 @@
#include <stdint.h>
#include <string>
#include <tuple>
#include <variant>
#include <vector>
class BanMan;
@ -214,7 +215,7 @@ public:
virtual std::optional<Coin> getUnspentOutput(const COutPoint& output) = 0;
//! Broadcast transaction.
virtual node::TransactionError broadcastTransaction(CTransactionRef tx, CAmount max_tx_fee, std::string& err_string) = 0;
virtual node::TransactionError broadcastTransaction(CTransactionRef tx, const std::variant<CAmount, CFeeRate>& max_tx_fee, std::string& err_string) = 0;
//! Get wallet loader.
virtual WalletLoader& walletLoader() = 0;

2
src/node/interfaces.cpp
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@ -355,7 +355,7 @@ public:
if (chainman().ActiveChainstate().CoinsTip().GetCoin(output, coin)) return coin;
return {};
}
TransactionError broadcastTransaction(CTransactionRef tx, CAmount max_tx_fee, std::string& err_string) override
TransactionError broadcastTransaction(CTransactionRef tx, const std::variant<CAmount, CFeeRate>& max_tx_fee, std::string& err_string) override
{
return BroadcastTransaction(*m_context, std::move(tx), err_string, max_tx_fee, /*relay=*/ true, /*wait_callback=*/ false);
}

17
src/node/transaction.cpp
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@ -31,7 +31,7 @@ static TransactionError HandleATMPError(const TxValidationState& state, std::str
}
}
TransactionError BroadcastTransaction(NodeContext& node, const CTransactionRef tx, std::string& err_string, const CAmount& max_tx_fee, bool relay, bool wait_callback)
TransactionError BroadcastTransaction(NodeContext& node, const CTransactionRef tx, std::string& err_string, const std::variant<CAmount, CFeeRate>& max_tx_fee, bool relay, bool wait_callback)
{
// BroadcastTransaction can be called by RPC or by the wallet.
// chainman, mempool and peerman are initialized before the RPC server and wallet are started
@ -69,14 +69,23 @@ TransactionError BroadcastTransaction(NodeContext& node, const CTransactionRef t
wtxid = mempool_tx->GetWitnessHash();
} else {
// Transaction is not already in the mempool.
if (max_tx_fee > 0) {
const bool max_tx_fee_set{(std::holds_alternative<CAmount>(max_tx_fee) ? std::get<CAmount>(max_tx_fee) : std::get<CFeeRate>(max_tx_fee).GetFeePerK()) > 0};
if (max_tx_fee_set) {
// First, call ATMP with test_accept and check the fee. If ATMP
// fails here, return error immediately.
const MempoolAcceptResult result = node.chainman->ProcessTransaction(tx, /*test_accept=*/ true);
if (result.m_result_type != MempoolAcceptResult::ResultType::VALID) {
return HandleATMPError(result.m_state, err_string);
} else if (result.m_base_fees.value() > max_tx_fee) {
return TransactionError::MAX_FEE_EXCEEDED;
} else {
CAmount max_tx_fee_abs;
if (std::holds_alternative<CFeeRate>(max_tx_fee)) {
max_tx_fee_abs = std::get<CFeeRate>(max_tx_fee).GetFee(*Assert(result.m_vsize));
} else {
max_tx_fee_abs = std::get<CAmount>(max_tx_fee);
}
if (result.m_base_fees.value() > max_tx_fee_abs) {
return TransactionError::MAX_FEE_EXCEEDED;
}
}
}
// Try to submit the transaction to the mempool.

4
src/node/transaction.h
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@ -9,6 +9,8 @@
#include <policy/feerate.h>
#include <primitives/transaction.h>
#include <variant>
class CBlockIndex;
class CTxMemPool;
namespace Consensus {
@ -49,7 +51,7 @@ static const CAmount DEFAULT_MAX_BURN_AMOUNT{0};
* @param[in] wait_callback wait until callbacks have been processed to avoid stale result due to a sequentially RPC.
* return error
*/
[[nodiscard]] TransactionError BroadcastTransaction(NodeContext& node, CTransactionRef tx, std::string& err_string, const CAmount& max_tx_fee, bool relay, bool wait_callback);
[[nodiscard]] TransactionError BroadcastTransaction(NodeContext& node, CTransactionRef tx, std::string& err_string, const std::variant<CAmount, CFeeRate>& max_tx_fee, bool relay, bool wait_callback);
/**
* Return transaction with a given hash.