/root/bitcoin/src/node/transaction.cpp

Source (jump to first uncovered line)
// Copyright (c) 2010 Satoshi Nakamoto
// Copyright (c) 2009-2021 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 <index/txindex.h>
#include <net.h>
#include <net_processing.h>
#include <node/blockstorage.h>
#include <node/context.h>
#include <node/types.h>
#include <txmempool.h>
#include <validation.h>
#include <validationinterface.h>
#include <node/transaction.h>

#include <future>

namespace node {
static TransactionError HandleATMPError(const TxValidationState& state, std::string& err_string_out)
{
    err_string_out = state.ToString();
    if (state.IsInvalid()) {
        if (state.GetResult() == TxValidationResult::TX_MISSING_INPUTS) {
            return TransactionError::MISSING_INPUTS;
        }
        return TransactionError::MEMPOOL_REJECTED;
    } else {
        return TransactionError::MEMPOOL_ERROR;
    }
}

TransactionError BroadcastTransaction(NodeContext& node, const CTransactionRef tx, std::string& err_string, const CAmount& max_tx_fee, bool relay, bool wait_callback)
{
    // BroadcastTransaction can be called by RPC or by the wallet.
    // chainman, mempool and peerman are initialized before the RPC server and wallet are started
    // and reset after the RPC sever and wallet are stopped.
    assert(node.chainman);
    assert(node.mempool);
    assert(node.peerman);

    std::promise<void> promise;
    Txid txid = tx->GetHash();
    uint256 wtxid = tx->GetWitnessHash();
    bool callback_set = false;

    {
        LOCK(cs_main);

        // If the transaction is already confirmed in the chain, don't do anything
        // and return early.
        CCoinsViewCache &view = node.chainman->ActiveChainstate().CoinsTip();
        for (size_t o = 0; o < tx->vout.size(); o++) {
            const Coin& existingCoin = view.AccessCoin(COutPoint(txid, o));
            // IsSpent doesn't mean the coin is spent, it means the output doesn't exist.
            // So if the output does exist, then this transaction exists in the chain.
            if (!existingCoin.IsSpent()) return TransactionError::ALREADY_IN_UTXO_SET;
        }

        if (auto mempool_tx = node.mempool->get(txid); mempool_tx) {
            // There's already a transaction in the mempool with this txid. Don't
            // try to submit this transaction to the mempool (since it'll be
            // rejected as a TX_CONFLICT), but do attempt to reannounce the mempool
            // transaction if relay=true.
            //
            // The mempool transaction may have the same or different witness (and
            // wtxid) as this transaction. Use the mempool's wtxid for reannouncement.
            wtxid = mempool_tx->GetWitnessHash();
        } else {
            // Transaction is not already in the mempool.
            if (max_tx_fee > 0) {
                // First, call ATMP with test_accept and check the fee. If ATMP
                // fails here, return error immediately.
                const MempoolAcceptResult result = node.chainman->ProcessTransaction(tx, /*test_accept=*/ true);
                if (result.m_result_type != MempoolAcceptResult::ResultType::VALID) {
                    return HandleATMPError(result.m_state, err_string);
                } else if (result.m_base_fees.value() > max_tx_fee) {
                    return TransactionError::MAX_FEE_EXCEEDED;
                }
            }
            // Try to submit the transaction to the mempool.
            const MempoolAcceptResult result = node.chainman->ProcessTransaction(tx, /*test_accept=*/ false);
            if (result.m_result_type != MempoolAcceptResult::ResultType::VALID) {
                return HandleATMPError(result.m_state, err_string);
            }

            // Transaction was accepted to the mempool.

            if (relay) {
                // the mempool tracks locally submitted transactions to make a
                // best-effort of initial broadcast
                node.mempool->AddUnbroadcastTx(txid);
            }

            if (wait_callback && node.validation_signals) {
                // For transactions broadcast from outside the wallet, make sure
                // that the wallet has been notified of the transaction before
                // continuing.
                //
                // 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.
                node.validation_signals->CallFunctionInValidationInterfaceQueue([&promise] {
                    promise.set_value();
                });
                callback_set = true;
            }
        }
    } // cs_main

    if (callback_set) {
        // Wait until Validation Interface clients have been notified of the
        // transaction entering the mempool.
        promise.get_future().wait();
    }

    if (relay) {
        node.peerman->RelayTransaction(txid, wtxid);
    }

    return TransactionError::OK;
}

CTransactionRef GetTransaction(const CBlockIndex* const block_index, const CTxMemPool* const mempool, const uint256& hash, uint256& hashBlock, const BlockManager& blockman)
{
    if (mempool && !block_index) {
        CTransactionRef ptx = mempool->get(hash);
        if (ptx) return ptx;
    }
    if (g_txindex) {
        CTransactionRef tx;
        uint256 block_hash;
        if (g_txindex->FindTx(hash, block_hash, tx)) {
            if (!block_index || block_index->GetBlockHash() == block_hash) {
                // Don't return the transaction if the provided block hash doesn't match.
                // The case where a transaction appears in multiple blocks (e.g. reorgs or
                // BIP30) is handled by the block lookup below.
                hashBlock = block_hash;
                return tx;
            }
        }
    }
    if (block_index) {
        CBlock block;
        if (blockman.ReadBlock(block, *block_index)) {
            for (const auto& tx : block.vtx) {
                if (tx->GetHash() == hash) {
                    hashBlock = block_index->GetBlockHash();
                    return tx;
                }
            }
        }
    }
    return nullptr;
}
} // namespace node

Line	Count	Source (jump to first uncovered line)
1		// Copyright (c) 2010 Satoshi Nakamoto
2		// Copyright (c) 2009-2021 The Bitcoin Core developers
3		// Distributed under the MIT software license, see the accompanying
4		// file COPYING or http://www.opensource.org/licenses/mit-license.php.
5
6		#include <consensus/validation.h>
7		#include <index/txindex.h>
8		#include <net.h>
9		#include <net_processing.h>
10		#include <node/blockstorage.h>
11		#include <node/context.h>
12		#include <node/types.h>
13		#include <txmempool.h>
14		#include <validation.h>
15		#include <validationinterface.h>
16		#include <node/transaction.h>
17
18		#include <future>
19
20		namespace node {
21		static TransactionError HandleATMPError(const TxValidationState& state, std::string& err_string_out)
22	0	{
23	0	err_string_out = state.ToString();
24	0	if (state.IsInvalid()) {
25	0	if (state.GetResult() == TxValidationResult::TX_MISSING_INPUTS) {
26	0	return TransactionError::MISSING_INPUTS;
27	0	}
28	0	return TransactionError::MEMPOOL_REJECTED;
29	0	} else {
30	0	return TransactionError::MEMPOOL_ERROR;
31	0	}
32	0	}
33
34		TransactionError BroadcastTransaction(NodeContext& node, const CTransactionRef tx, std::string& err_string, const CAmount& max_tx_fee, bool relay, bool wait_callback)
35	0	{
36		// BroadcastTransaction can be called by RPC or by the wallet.
37		// chainman, mempool and peerman are initialized before the RPC server and wallet are started
38		// and reset after the RPC sever and wallet are stopped.
39	0	assert(node.chainman);
40	0	assert(node.mempool);
41	0	assert(node.peerman);
42
43	0	std::promise<void> promise;
44	0	Txid txid = tx->GetHash();
45	0	uint256 wtxid = tx->GetWitnessHash();
46	0	bool callback_set = false;
47
48	0	{
49	0	LOCK(cs_main);
50
51		// If the transaction is already confirmed in the chain, don't do anything
52		// and return early.
53	0	CCoinsViewCache &view = node.chainman->ActiveChainstate().CoinsTip();
54	0	for (size_t o = 0; o < tx->vout.size(); o++) {
55	0	const Coin& existingCoin = view.AccessCoin(COutPoint(txid, o));
56		// IsSpent doesn't mean the coin is spent, it means the output doesn't exist.
57		// So if the output does exist, then this transaction exists in the chain.
58	0	if (!existingCoin.IsSpent()) return TransactionError::ALREADY_IN_UTXO_SET;
59	0	}
60
61	0	if (auto mempool_tx = node.mempool->get(txid); mempool_tx) {
62		// There's already a transaction in the mempool with this txid. Don't
63		// try to submit this transaction to the mempool (since it'll be
64		// rejected as a TX_CONFLICT), but do attempt to reannounce the mempool
65		// transaction if relay=true.
66		//
67		// The mempool transaction may have the same or different witness (and
68		// wtxid) as this transaction. Use the mempool's wtxid for reannouncement.
69	0	wtxid = mempool_tx->GetWitnessHash();
70	0	} else {
71		// Transaction is not already in the mempool.
72	0	if (max_tx_fee > 0) {
73		// First, call ATMP with test_accept and check the fee. If ATMP
74		// fails here, return error immediately.
75	0	const MempoolAcceptResult result = node.chainman->ProcessTransaction(tx, /test_accept=/ true);
76	0	if (result.m_result_type != MempoolAcceptResult::ResultType::VALID) {
77	0	return HandleATMPError(result.m_state, err_string);
78	0	} else if (result.m_base_fees.value() > max_tx_fee) {
79	0	return TransactionError::MAX_FEE_EXCEEDED;
80	0	}
81	0	}
82		// Try to submit the transaction to the mempool.
83	0	const MempoolAcceptResult result = node.chainman->ProcessTransaction(tx, /test_accept=/ false);
84	0	if (result.m_result_type != MempoolAcceptResult::ResultType::VALID) {
85	0	return HandleATMPError(result.m_state, err_string);
86	0	}
87
88		// Transaction was accepted to the mempool.
89
90	0	if (relay) {
91		// the mempool tracks locally submitted transactions to make a
92		// best-effort of initial broadcast
93	0	node.mempool->AddUnbroadcastTx(txid);
94	0	}
95
96	0	if (wait_callback && node.validation_signals) {
97		// For transactions broadcast from outside the wallet, make sure
98		// that the wallet has been notified of the transaction before
99		// continuing.
100		//
101		// This prevents a race where a user might call sendrawtransaction
102		// with a transaction to/from their wallet, immediately call some
103		// wallet RPC, and get a stale result because callbacks have not
104		// yet been processed.
105	0	node.validation_signals->CallFunctionInValidationInterfaceQueue([&promise] {
106	0	promise.set_value();
107	0	});
108	0	callback_set = true;
109	0	}
110	0	}
111	0	} // cs_main
112
113	0	if (callback_set) {
114		// Wait until Validation Interface clients have been notified of the
115		// transaction entering the mempool.
116	0	promise.get_future().wait();
117	0	}
118
119	0	if (relay) {
120	0	node.peerman->RelayTransaction(txid, wtxid);
121	0	}
122
123	0	return TransactionError::OK;
124	0	}
125
126		CTransactionRef GetTransaction(const CBlockIndex* const block_index, const CTxMemPool* const mempool, const uint256& hash, uint256& hashBlock, const BlockManager& blockman)
127	0	{
128	0	if (mempool && !block_index) {
129	0	CTransactionRef ptx = mempool->get(hash);
130	0	if (ptx) return ptx;
131	0	}
132	0	if (g_txindex) {
133	0	CTransactionRef tx;
134	0	uint256 block_hash;
135	0	if (g_txindex->FindTx(hash, block_hash, tx)) {
136	0	if (!block_index \|\| block_index->GetBlockHash() == block_hash) {
137		// Don't return the transaction if the provided block hash doesn't match.
138		// The case where a transaction appears in multiple blocks (e.g. reorgs or
139		// BIP30) is handled by the block lookup below.
140	0	hashBlock = block_hash;
141	0	return tx;
142	0	}
143	0	}
144	0	}
145	0	if (block_index) {
146	0	CBlock block;
147	0	if (blockman.ReadBlock(block, *block_index)) {
148	0	for (const auto& tx : block.vtx) {
149	0	if (tx->GetHash() == hash) {
150	0	hashBlock = block_index->GetBlockHash();
151	0	return tx;
152	0	}
153	0	}
154	0	}
155	0	}
156	0	return nullptr;
157	0	}
158		} // namespace node

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Created: 2025-04-09 20:14