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interfaces: Change getUnspentOutput return type to avoid multiprocess segfault

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Coin serialize method segfaults if IsSpent condition is true. This caused
multiprocess code to segfault when serializing the Coin& output argument to of
the Node::getUnspentOutput method if the coin was not found. Segfault could be
triggered by double clicking and viewing transaction details in the GUI
transaction list.

Fix this by replacing Coin& output argument with optional<Coin> return value to
avoid trying to serializing spent coins.
This commit is contained in:
Ryan Ofsky 2022-09-12 11:09:06 -04:00
parent 4978754c00
commit 156f49d682
3 changed files with 8 additions and 8 deletions
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6
src/node/interfaces.cpp
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@ -328,10 +328,12 @@ public:
std::vector<std::string> listRpcCommands() override { return ::tableRPC.listCommands(); }
void rpcSetTimerInterfaceIfUnset(RPCTimerInterface* iface) override { RPCSetTimerInterfaceIfUnset(iface); }
void rpcUnsetTimerInterface(RPCTimerInterface* iface) override { RPCUnsetTimerInterface(iface); }
bool getUnspentOutput(const COutPoint& output, Coin& coin) override
std::optional<Coin> getUnspentOutput(const COutPoint& output) override
{
LOCK(::cs_main);
return chainman().ActiveChainstate().CoinsTip().GetCoin(output, coin);
Coin coin;
if (chainman().ActiveChainstate().CoinsTip().GetCoin(output, coin)) return coin;
return {};
}
TransactionError broadcastTransaction(CTransactionRef tx, CAmount max_tx_fee, std::string& err_string) override
{