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RPC submitpackage: change return format to allow partial errors

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Behavior prior to this commit allows some transactions to
enter into the local mempool but not be reported to the user
when encountering a PackageValidationResult::PCKG_TX result.

This is further compounded with the fact that any transactions
submitted to the mempool during this call would also not be
relayed to peers, resulting in unexpected behavior.

Fix this by, if encountering a package error, reporting all
wtxids, along with a new error field, and broadcasting every
transaction that was found in the mempool after submission.

Note that this also changes fees and vsize to optional,
which should also remove an issue with other-wtxid cases.
This commit is contained in:
Greg Sanders
2023-11-10 15:12:34 -05:00
parent 1fdd832842
commit b67db52c39
4 changed files with 79 additions and 32 deletions
Download Patch File Download Diff File Expand all files Collapse all files

73
src/rpc/mempool.cpp
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@@ -822,7 +822,7 @@ static RPCHelpMan submitpackage()
return RPCHelpMan{"submitpackage",
"Submit a package of raw transactions (serialized, hex-encoded) to local node.\n"
"The package must consist of a child with its parents, and none of the parents may depend on one another.\n"
"The package will be validated according to consensus and mempool policy rules. If all transactions pass, they will be accepted to mempool.\n"
"The package will be validated according to consensus and mempool policy rules. If any transaction passes, it will be accepted to mempool.\n"
"This RPC is experimental and the interface may be unstable. Refer to doc/policy/packages.md for documentation on package policies.\n"
"Warning: successful submission does not mean the transactions will propagate throughout the network.\n"
,
@@ -836,19 +836,21 @@ static RPCHelpMan submitpackage()
RPCResult{
RPCResult::Type::OBJ, "", "",
{
{RPCResult::Type::STR, "package_msg", "The transaction package result message. \"success\" indicates all transactions were accepted into or are already in the mempool."},
{RPCResult::Type::OBJ_DYN, "tx-results", "transaction results keyed by wtxid",
{
{RPCResult::Type::OBJ, "wtxid", "transaction wtxid", {
{RPCResult::Type::STR_HEX, "txid", "The transaction hash in hex"},
{RPCResult::Type::STR_HEX, "other-wtxid", /*optional=*/true, "The wtxid of a different transaction with the same txid but different witness found in the mempool. This means the submitted transaction was ignored."},
{RPCResult::Type::NUM, "vsize", "Virtual transaction size as defined in BIP 141."},
{RPCResult::Type::OBJ, "fees", "Transaction fees", {
{RPCResult::Type::NUM, "vsize", /*optional=*/true, "Virtual transaction size as defined in BIP 141."},
{RPCResult::Type::OBJ, "fees", /*optional=*/true, "Transaction fees", {
{RPCResult::Type::STR_AMOUNT, "base", "transaction fee in " + CURRENCY_UNIT},
{RPCResult::Type::STR_AMOUNT, "effective-feerate", /*optional=*/true, "if the transaction was not already in the mempool, the effective feerate in " + CURRENCY_UNIT + " per KvB. For example, the package feerate and/or feerate with modified fees from prioritisetransaction."},
{RPCResult::Type::ARR, "effective-includes", /*optional=*/true, "if effective-feerate is provided, the wtxids of the transactions whose fees and vsizes are included in effective-feerate.",
{{RPCResult::Type::STR_HEX, "", "transaction wtxid in hex"},
}},
}},
{RPCResult::Type::STR, "error", /*optional=*/true, "The transaction error string, if it was rejected by the mempool"},
}}
}},
{RPCResult::Type::ARR, "replaced-transactions", /*optional=*/true, "List of txids of replaced transactions",
@@ -888,57 +890,77 @@ static RPCHelpMan submitpackage()
Chainstate& chainstate = EnsureChainman(node).ActiveChainstate();
const auto package_result = WITH_LOCK(::cs_main, return ProcessNewPackage(chainstate, mempool, txns, /*test_accept=*/ false));
// First catch any errors.
std::string package_msg = "success";
// First catch package-wide errors, continue if we can
switch(package_result.m_state.GetResult()) {
case PackageValidationResult::PCKG_RESULT_UNSET: break;
case PackageValidationResult::PCKG_POLICY:
case PackageValidationResult::PCKG_RESULT_UNSET:
{
throw JSONRPCTransactionError(TransactionError::INVALID_PACKAGE,
package_result.m_state.GetRejectReason());
// Belt-and-suspenders check; everything should be successful here
CHECK_NONFATAL(package_result.m_tx_results.size() == txns.size());
for (const auto& tx : txns) {
CHECK_NONFATAL(mempool.exists(GenTxid::Txid(tx->GetHash())));
}
break;
}
case PackageValidationResult::PCKG_MEMPOOL_ERROR:
{
// This only happens with internal bug; user should stop and report
throw JSONRPCTransactionError(TransactionError::MEMPOOL_ERROR,
package_result.m_state.GetRejectReason());
}
case PackageValidationResult::PCKG_POLICY:
case PackageValidationResult::PCKG_TX:
{
for (const auto& tx : txns) {
auto it = package_result.m_tx_results.find(tx->GetWitnessHash());
if (it != package_result.m_tx_results.end() && it->second.m_state.IsInvalid()) {
throw JSONRPCTransactionError(TransactionError::MEMPOOL_REJECTED,
strprintf("%s failed: %s", tx->GetHash().ToString(), it->second.m_state.GetRejectReason()));
}
}
// If a PCKG_TX error was returned, there must have been an invalid transaction.
NONFATAL_UNREACHABLE();
// Package-wide error we want to return, but we also want to return individual responses
package_msg = package_result.m_state.GetRejectReason();
CHECK_NONFATAL(package_result.m_tx_results.size() == txns.size() ||
package_result.m_tx_results.empty());
break;
}
}
size_t num_broadcast{0};
for (const auto& tx : txns) {
// We don't want to re-submit the txn for validation in BroadcastTransaction
if (!mempool.exists(GenTxid::Txid(tx->GetHash()))) {
continue;
}
// We do not expect an error here; we are only broadcasting things already/still in mempool
std::string err_string;
const auto err = BroadcastTransaction(node, tx, err_string, /*max_tx_fee=*/0, /*relay=*/true, /*wait_callback=*/true);
if (err != TransactionError::OK) {
throw JSONRPCTransactionError(err,
strprintf("transaction broadcast failed: %s (all transactions were submitted, %d transactions were broadcast successfully)",
strprintf("transaction broadcast failed: %s (%d transactions were broadcast successfully)",
err_string, num_broadcast));
}
num_broadcast++;
}
UniValue rpc_result{UniValue::VOBJ};
rpc_result.pushKV("package_msg", package_msg);
UniValue tx_result_map{UniValue::VOBJ};
std::set<uint256> replaced_txids;
for (const auto& tx : txns) {
auto it = package_result.m_tx_results.find(tx->GetWitnessHash());
CHECK_NONFATAL(it != package_result.m_tx_results.end());
UniValue result_inner{UniValue::VOBJ};
result_inner.pushKV("txid", tx->GetHash().GetHex());
const auto& tx_result = it->second;
if (it->second.m_result_type == MempoolAcceptResult::ResultType::DIFFERENT_WITNESS) {
result_inner.pushKV("other-wtxid", it->second.m_other_wtxid.value().GetHex());
auto it = package_result.m_tx_results.find(tx->GetWitnessHash());
if (it == package_result.m_tx_results.end()) {
// No results, report error and continue
result_inner.pushKV("error", "unevaluated");
continue;
}
if (it->second.m_result_type == MempoolAcceptResult::ResultType::VALID ||
it->second.m_result_type == MempoolAcceptResult::ResultType::MEMPOOL_ENTRY) {
const auto& tx_result = it->second;
switch(it->second.m_result_type) {
case MempoolAcceptResult::ResultType::DIFFERENT_WITNESS:
result_inner.pushKV("other-wtxid", it->second.m_other_wtxid.value().GetHex());
break;
case MempoolAcceptResult::ResultType::INVALID:
result_inner.pushKV("error", it->second.m_state.ToString());
break;
case MempoolAcceptResult::ResultType::VALID:
case MempoolAcceptResult::ResultType::MEMPOOL_ENTRY:
result_inner.pushKV("vsize", int64_t{it->second.m_vsize.value()});
UniValue fees(UniValue::VOBJ);
fees.pushKV("base", ValueFromAmount(it->second.m_base_fees.value()));
@@ -959,6 +981,7 @@ static RPCHelpMan submitpackage()
replaced_txids.insert(ptx->GetHash());
}
}
break;
}
tx_result_map.pushKV(tx->GetWitnessHash().GetHex(), result_inner);
}