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// Copyright (c) 2010 Satoshi Nakamoto
// Copyright (c) 2009-2018 The Bitcoin Core developers
// Distributed under the MIT software license, see the accompanying
// file COPYING or http://www.opensource.org/licenses/mit-license.php.
#include <consensus/validation.h>
#include <net.h>
#include <rpc/server.h>
#include <txmempool.h>
#include <validation.h>
#include <validationinterface.h>
#include <node/transaction.h>
#include <future>
uint256 BroadcastTransaction(const CTransactionRef tx, const bool allowhighfees) {
std::promise<void> promise;
const uint256& hashTx = tx->GetHash();
CAmount nMaxRawTxFee = maxTxFee;
if (allowhighfees)
nMaxRawTxFee = 0;
{ // cs_main scope
LOCK(cs_main);
CCoinsViewCache &view = *pcoinsTip;
bool fHaveChain = false;
for (size_t o = 0; !fHaveChain && o < tx->vout.size(); o++) {
const Coin& existingCoin = view.AccessCoin(COutPoint(hashTx, o));
fHaveChain = !existingCoin.IsSpent();
}
bool fHaveMempool = mempool.exists(hashTx);
if (!fHaveMempool && !fHaveChain) {
// push to local node and sync with wallets
CValidationState state;
bool fMissingInputs;
if (!AcceptToMemoryPool(mempool, state, std::move(tx), &fMissingInputs,
nullptr /* plTxnReplaced */, false /* bypass_limits */, nMaxRawTxFee)) {
if (state.IsInvalid()) {
throw JSONRPCError(RPC_TRANSACTION_REJECTED, FormatStateMessage(state));
} else {
if (fMissingInputs) {
throw JSONRPCError(RPC_TRANSACTION_ERROR, "Missing inputs");
}
throw JSONRPCError(RPC_TRANSACTION_ERROR, FormatStateMessage(state));
}
} else {
// If wallet is enabled, ensure that the wallet has been made aware
// of the new transaction prior to returning. This prevents a race
// where a user might call sendrawtransaction with a transaction
// to/from their wallet, immediately call some wallet RPC, and get
// a stale result because callbacks have not yet been processed.
CallFunctionInValidationInterfaceQueue([&promise] {
promise.set_value();
});
}
} else if (fHaveChain) {
throw JSONRPCError(RPC_TRANSACTION_ALREADY_IN_CHAIN, "transaction already in block chain");
} else {
// Make sure we don't block forever if re-sending
// a transaction already in mempool.
promise.set_value();
}
} // cs_main
promise.get_future().wait();
if(!g_connman)
throw JSONRPCError(RPC_CLIENT_P2P_DISABLED, "Error: Peer-to-peer functionality missing or disabled");
CInv inv(MSG_TX, hashTx);
g_connman->ForEachNode([&inv](CNode* pnode)
{
pnode->PushInventory(inv);
});
return hashTx;
}
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