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Merge #15620: rpc: Uncouple non-wallet rpcs from maxTxFee global

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fa1ad200d3 doc: Add release notes for 15620 (MarcoFalke)
fa96d76421 rpc: Uncouple rpcs from maxTxFee global (MarcoFalke)
fa965e03c7 rpc: Use IsValidNumArgs over hardcoded size checks (MarcoFalke)

Pull request description:

  This makes the rpcs a bit more stateless by falling back to their own default max fee instead of the global maxTxFee.

  A follow up pull request will move `-maxtxfee` to the wallet.

  See also related discussions:

  * `-maxtxfee` should not be used by both node and wallet #15355
  *  [RFC] Long term plan for wallet command-line args #13044

ACKs for commit fa1ad2:
  jnewbery:
    utACK fa1ad200d3
  Empact:
    utACK fa1ad200d3
  jnewbery:
    utACK fa1ad200d3
  promag:
    utACK fa1ad20.

Tree-SHA512: c9cf0b54cd30ff3ab0d090b072cc38fcbb2840bc6ad9a9711995333bc927d2500aece6b5a60e061666eca5ed72b70aa318d21e51eb15ee0106b41f5b6e4e1adf
pull/15676/head
MarcoFalke 6 years ago
parent 848ec5603f fa1ad200d3
commit 656a15e539
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GPG Key ID: D2EA4850E7528B25
3 changed files with 34 additions and 13 deletions
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13
doc/release-notes-15620.md
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@ -0,0 +1,13 @@
Updated RPCs
------------
* The -maxtxfee setting no longer has any effect on non-wallet RPCs.
The `sendrawtransaction` and `testmempoolaccept` RPC methods previously
accepted an `allowhighfees` parameter to fail the mempool acceptance in case
the transaction's fee would exceed the value of the command line argument
`-maxtxfee`. To uncouple the RPCs from the global option, they now have a
hardcoded default for the maximum transaction fee, that can be changed for
both RPCs on a per-call basis with the `maxfeerate` parameter. The
`allowhighfees` boolean option has been removed and replaced by the
`maxfeerate` numeric option.

2
src/init.cpp
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@ -500,7 +500,7 @@ void SetupServerArgs()
gArgs.AddArg("-mocktime=<n>", "Replace actual time with <n> seconds since epoch (default: 0)", true, OptionsCategory::DEBUG_TEST);
gArgs.AddArg("-maxsigcachesize=<n>", strprintf("Limit sum of signature cache and script execution cache sizes to <n> MiB (default: %u)", DEFAULT_MAX_SIG_CACHE_SIZE), true, OptionsCategory::DEBUG_TEST);
gArgs.AddArg("-maxtipage=<n>", strprintf("Maximum tip age in seconds to consider node in initial block download (default: %u)", DEFAULT_MAX_TIP_AGE), true, OptionsCategory::DEBUG_TEST);
gArgs.AddArg("-maxtxfee=<amt>", strprintf("Maximum total fees (in %s) to use in a single wallet transaction or raw transaction; setting this too low may abort large transactions (default: %s)",
gArgs.AddArg("-maxtxfee=<amt>", strprintf("Maximum total fees (in %s) to use in a single wallet transaction; setting this too low may abort large transactions (default: %s)", // TODO move setting to wallet
CURRENCY_UNIT, FormatMoney(DEFAULT_TRANSACTION_MAXFEE)), false, OptionsCategory::DEBUG_TEST);
gArgs.AddArg("-printpriority", strprintf("Log transaction fee per kB when mining blocks (default: %u)", DEFAULT_PRINTPRIORITY), true, OptionsCategory::DEBUG_TEST);
gArgs.AddArg("-printtoconsole", "Send trace/debug info to console (default: 1 when no -daemon. To disable logging to file, set -nodebuglogfile)", false, OptionsCategory::DEBUG_TEST);

32
src/rpc/rawtransaction.cpp
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@ -40,6 +40,11 @@
#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 overriden with the maxfeerate argument.
*/
constexpr static CAmount DEFAULT_MAX_RAW_TX_FEE{COIN / 10};
static void TxToJSON(const CTransaction& tx, const uint256 hashBlock, UniValue& entry)
{
@ -1023,14 +1028,12 @@ static UniValue signrawtransactionwithkey(const JSONRPCRequest& request)
static UniValue sendrawtransaction(const JSONRPCRequest& request)
{
if (request.fHelp || request.params.size() < 1 || request.params.size() > 2)
throw std::runtime_error(
RPCHelpMan{"sendrawtransaction",
const RPCHelpMan help{"sendrawtransaction",
"\nSubmits raw transaction (serialized, hex-encoded) to local node and network.\n"
"\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(maxTxFee), "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), "Reject transactions whose fee rate is higher than the specified value, expressed in " + CURRENCY_UNIT + "/kB\n"},
},
RPCResult{
"\"hex\" (string) The transaction hash in hex\n"
@ -1045,7 +1048,11 @@ static UniValue sendrawtransaction(const JSONRPCRequest& request)
"\nAs a JSON-RPC call\n"
+ HelpExampleRpc("sendrawtransaction", "\"signedhex\"")
},
}.ToString());
};
if (request.fHelp || !help.IsValidNumArgs(request.params.size())) {
throw std::runtime_error(help.ToString());
}
RPCTypeCheck(request.params, {
UniValue::VSTR,
@ -1058,7 +1065,7 @@ 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 = maxTxFee;
CAmount max_raw_tx_fee = DEFAULT_MAX_RAW_TX_FEE;
// 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.");
@ -1085,9 +1092,7 @@ static UniValue sendrawtransaction(const JSONRPCRequest& request)
static UniValue testmempoolaccept(const JSONRPCRequest& request)
{
if (request.fHelp || request.params.size() < 1 || request.params.size() > 2) {
throw std::runtime_error(
RPCHelpMan{"testmempoolaccept",
const RPCHelpMan help{"testmempoolaccept",
"\nReturns result of mempool acceptance tests indicating if raw transaction (serialized, hex-encoded) would be accepted by mempool.\n"
"\nThis checks if the transaction violates the consensus or policy rules.\n"
"\nSee sendrawtransaction call.\n",
@ -1098,7 +1103,7 @@ static UniValue testmempoolaccept(const JSONRPCRequest& request)
{"rawtx", RPCArg::Type::STR_HEX, RPCArg::Optional::OMITTED, ""},
},
},
{"maxfeerate", RPCArg::Type::AMOUNT, /* default */ FormatMoney(maxTxFee), "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), "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"
@ -1120,7 +1125,10 @@ static UniValue testmempoolaccept(const JSONRPCRequest& request)
"\nAs a JSON-RPC call\n"
+ HelpExampleRpc("testmempoolaccept", "[\"signedhex\"]")
},
}.ToString());
};
if (request.fHelp || !help.IsValidNumArgs(request.params.size())) {
throw std::runtime_error(help.ToString());
}
RPCTypeCheck(request.params, {
@ -1139,7 +1147,7 @@ static UniValue testmempoolaccept(const JSONRPCRequest& request)
CTransactionRef tx(MakeTransactionRef(std::move(mtx)));
const uint256& tx_hash = tx->GetHash();
CAmount max_raw_tx_fee = maxTxFee;
CAmount max_raw_tx_fee = DEFAULT_MAX_RAW_TX_FEE;
// 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.");

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