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Merge #16521: rpc: Use the default maxfeerate value as BTC/kB

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2dfd6834ef test: Add test for default maxfeerate in sendrawtransaction (Joonmo Yang)
261843e4be wallet/rpc: Use the default maxfeerate value as BTC/kB (Joonmo Yang)

Pull request description:

  Fixes https://github.com/bitcoin/bitcoin/issues/16382

  This patch tries to treat `maxfeerate` in sendrawtransaction/testmempoolaccept RPC as a rate(BTC/kB) instead of an absolute value(BTC).
  The included test case checks if the new behavior works correctly, by using the transaction with an absolute fee of ~0.02BTC, where the fee rate is ~0.2BTC/kB.
  This test should be failing if the default `maxfeerate` is 0.1BTC, but pass if the default value is 0.1BTC/kB

ACKs for top commit:
  laanwj:
    ACK 2dfd6834ef (ACKs by Sjors and MarcoFalke above for trivially different code)

Tree-SHA512: a1795bffe8a182acef8844797955db1f60bb0c0ded97148f3572dc265234d5219271a3a7aa0b6418a43f73b2b2720ef7412ba169c99bb1cdcac52051f537d6af
This commit is contained in:
Wladimir J. van der Laan
2019-09-18 16:47:23 +02:00
parent dd8cf82e96 2dfd6834ef
commit 0ee0474234
5 changed files with 48 additions and 26 deletions
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37
src/rpc/rawtransaction.cpp
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@@ -14,6 +14,7 @@
#include <node/coin.h>
#include <node/psbt.h>
#include <node/transaction.h>
#include <policy/policy.h>
#include <policy/rbf.h>
#include <primitives/transaction.h>
#include <psbt.h>
@@ -38,11 +39,11 @@
#include <univalue.h>
/** High fee for sendrawtransaction and testmempoolaccept.
* By default, transaction with a fee higher than this will be rejected by the
* RPCs. This can be overridden with the maxfeerate argument.
/** High fee rate for sendrawtransaction and testmempoolaccept.
* By default, transaction with a fee rate higher than this will be rejected by
* the RPCs. This can be overridden with the maxfeerate argument.
*/
constexpr static CAmount DEFAULT_MAX_RAW_TX_FEE{COIN / 10};
static const CFeeRate DEFAULT_MAX_RAW_TX_FEE_RATE{COIN / 10};
static void TxToJSON(const CTransaction& tx, const uint256 hashBlock, UniValue& entry)
{
@@ -775,7 +776,7 @@ static UniValue sendrawtransaction(const JSONRPCRequest& request)
"\nAlso see createrawtransaction and signrawtransactionwithkey calls.\n",
{
{"hexstring", RPCArg::Type::STR_HEX, RPCArg::Optional::NO, "The hex string of the raw transaction"},
{"maxfeerate", RPCArg::Type::AMOUNT, /* default */ FormatMoney(DEFAULT_MAX_RAW_TX_FEE),
{"maxfeerate", RPCArg::Type::AMOUNT, /* default */ FormatMoney(DEFAULT_MAX_RAW_TX_FEE_RATE.GetFeePerK()),
"Reject transactions whose fee rate is higher than the specified value, expressed in " + CURRENCY_UNIT +
"/kB.\nSet to 0 to accept any fee rate.\n"},
},
@@ -805,19 +806,17 @@ static UniValue sendrawtransaction(const JSONRPCRequest& request)
throw JSONRPCError(RPC_DESERIALIZATION_ERROR, "TX decode failed");
CTransactionRef tx(MakeTransactionRef(std::move(mtx)));
CAmount max_raw_tx_fee = DEFAULT_MAX_RAW_TX_FEE;
CFeeRate max_raw_tx_fee_rate = DEFAULT_MAX_RAW_TX_FEE_RATE;
// TODO: temporary migration code for old clients. Remove in v0.20
if (request.params[1].isBool()) {
throw JSONRPCError(RPC_INVALID_PARAMETER, "Second argument must be numeric (maxfeerate) and no longer supports a boolean. To allow a transaction with high fees, set maxfeerate to 0.");
} else if (!request.params[1].isNull()) {
size_t weight = GetTransactionWeight(*tx);
CFeeRate fr(AmountFromValue(request.params[1]));
// the +3/4 part rounds the value up, and is the same formula used when
// calculating the fee for a transaction
// (see GetVirtualTransactionSize)
max_raw_tx_fee = fr.GetFee((weight+3)/4);
max_raw_tx_fee_rate = CFeeRate(AmountFromValue(request.params[1]));
}
int64_t virtual_size = GetVirtualTransactionSize(*tx);
CAmount max_raw_tx_fee = max_raw_tx_fee_rate.GetFee(virtual_size);
std::string err_string;
AssertLockNotHeld(cs_main);
const TransactionError err = BroadcastTransaction(tx, err_string, max_raw_tx_fee, /*relay*/ true, /*wait_callback*/ true);
@@ -841,7 +840,7 @@ static UniValue testmempoolaccept(const JSONRPCRequest& request)
{"rawtx", RPCArg::Type::STR_HEX, RPCArg::Optional::OMITTED, ""},
},
},
{"maxfeerate", RPCArg::Type::AMOUNT, /* default */ FormatMoney(DEFAULT_MAX_RAW_TX_FEE), "Reject transactions whose fee rate is higher than the specified value, expressed in " + CURRENCY_UNIT + "/kB\n"},
{"maxfeerate", RPCArg::Type::AMOUNT, /* default */ FormatMoney(DEFAULT_MAX_RAW_TX_FEE_RATE.GetFeePerK()), "Reject transactions whose fee rate is higher than the specified value, expressed in " + CURRENCY_UNIT + "/kB\n"},
},
RPCResult{
"[ (array) The result of the mempool acceptance test for each raw transaction in the input array.\n"
@@ -881,19 +880,17 @@ static UniValue testmempoolaccept(const JSONRPCRequest& request)
CTransactionRef tx(MakeTransactionRef(std::move(mtx)));
const uint256& tx_hash = tx->GetHash();
CAmount max_raw_tx_fee = DEFAULT_MAX_RAW_TX_FEE;
CFeeRate max_raw_tx_fee_rate = DEFAULT_MAX_RAW_TX_FEE_RATE;
// TODO: temporary migration code for old clients. Remove in v0.20
if (request.params[1].isBool()) {
throw JSONRPCError(RPC_INVALID_PARAMETER, "Second argument must be numeric (maxfeerate) and no longer supports a boolean. To allow a transaction with high fees, set maxfeerate to 0.");
} else if (!request.params[1].isNull()) {
size_t weight = GetTransactionWeight(*tx);
CFeeRate fr(AmountFromValue(request.params[1]));
// the +3/4 part rounds the value up, and is the same formula used when
// calculating the fee for a transaction
// (see GetVirtualTransactionSize)
max_raw_tx_fee = fr.GetFee((weight+3)/4);
max_raw_tx_fee_rate = CFeeRate(AmountFromValue(request.params[1]));
}
int64_t virtual_size = GetVirtualTransactionSize(*tx);
CAmount max_raw_tx_fee = max_raw_tx_fee_rate.GetFee(virtual_size);
UniValue result(UniValue::VARR);
UniValue result_0(UniValue::VOBJ);
result_0.pushKV("txid", tx_hash.GetHex());