/tmp/bitcoin/src/interfaces/mining.h

Source
// Copyright (c) 2024-present The Bitcoin Core developers
// Distributed under the MIT software license, see the accompanying
// file COPYING or http://www.opensource.org/licenses/mit-license.php.

#ifndef BITCOIN_INTERFACES_MINING_H
#define BITCOIN_INTERFACES_MINING_H

#include <consensus/amount.h>
#include <interfaces/types.h>
#include <node/mining_types.h>
#include <primitives/block.h>
#include <primitives/transaction.h>
#include <uint256.h>
#include <util/time.h>

#include <cstdint>
#include <memory>
#include <optional>
#include <stdexcept>
#include <string>
#include <vector>

namespace node {
struct NodeContext;
} // namespace node

namespace interfaces {

//! Block template interface
class BlockTemplate
{
public:
    virtual ~BlockTemplate() = default;

    virtual CBlockHeader getBlockHeader() = 0;
    // Block contains a dummy coinbase transaction that should not be used and
    // it may not match a transaction constructed from getCoinbaseTx().
    virtual CBlock getBlock() = 0;

    // Fees per transaction, not including coinbase transaction.
    virtual std::vector<CAmount> getTxFees() = 0;
    // Sigop cost per transaction, not including coinbase transaction.
    virtual std::vector<int64_t> getTxSigops() = 0;

    /** Return fields needed to construct a coinbase transaction */
    virtual node::CoinbaseTx getCoinbaseTx() = 0;

    /**
     * Compute merkle path to the coinbase transaction
     *
     * @return merkle path ordered from the deepest
     */
    virtual std::vector<uint256> getCoinbaseMerklePath() = 0;

    /**
     * Construct and broadcast the block. Modifies the template in place,
     * updating the fields listed below as well as the merkle root.
     *
     * @param[in] version version block header field
     * @param[in] timestamp time block header field (unix timestamp)
     * @param[in] nonce nonce block header field
     * @param[in] coinbase complete coinbase transaction (including witness)
     * @param[out] reason failure reason (BIP22)
     * @param[out] debug  more detailed rejection reason
     *
     * @note Unlike the submitblock RPC, this method does not call
     *       UpdateUncommittedBlockStructures to add a missing coinbase witness
     *       reserved value. Callers must provide a complete coinbase transaction,
     *       including the witness when a witness commitment is present.
     *
     * @note for heights <= 16, the BIP34 height push in getCoinbaseTx().script_sig_prefix
     *       is only one byte long, so the coinbase scriptSig needs at least
     *       one additional byte of data to avoid bad-cb-length.
     *
     * @returns true if the block was accepted as a new block
     */
    virtual bool submitSolution(uint32_t version, uint32_t timestamp, uint32_t nonce, CTransactionRef coinbase, std::string& reason, std::string& debug) = 0;

    //! Deprecated older method preserved to return an explicit error for IPC
    //! clients using mining.capnp @7.
    virtual bool submitSolutionOld7(uint32_t, uint32_t, uint32_t, CTransactionRef)
    {
        throw std::runtime_error("Old submitSolution (@7) not supported. Please update your client!");
    }

    /**
     * Waits for fees in the next block to rise, a new tip or the timeout.
     *
     * @param[in] options   Control the timeout (default forever) and by how much total fees
     *                      for the next block should rise (default infinite).
     *
     * @returns a new BlockTemplate or nothing if the timeout occurs.
     *
     * On testnet this will additionally return a template with difficulty 1 if
     * the tip is more than 20 minutes old.
     */
    virtual std::unique_ptr<BlockTemplate> waitNext(node::BlockWaitOptions options = {}) = 0;

    /**
     * Interrupts the current wait for the next block template.
    */
    virtual void interruptWait() = 0;
};

//! Interface giving clients (RPC, Stratum v2 Template Provider in the future)
//! ability to create block templates.
class Mining
{
public:
    virtual ~Mining() = default;

    //! If this chain is exclusively used for testing
    virtual bool isTestChain() = 0;

    //! Returns whether IBD is still in progress.
    virtual bool isInitialBlockDownload() = 0;

    //! Returns the hash and height for the tip of this chain
    virtual std::optional<BlockRef> getTip() = 0;

    /**
     * Waits for the connected tip to change. During node initialization, this will
     * wait until the tip is connected (regardless of `timeout`).
     *
     * @param[in] current_tip block hash of the current chain tip. Function waits
     *                        for the chain tip to differ from this.
     * @param[in] timeout     how long to wait for a new tip (default is forever)
     *
     * @retval BlockRef hash and height of the current chain tip after this call.
     * @retval std::nullopt if the node is shut down or interrupt() is called.
     */
    virtual std::optional<BlockRef> waitTipChanged(uint256 current_tip, MillisecondsDouble timeout = MillisecondsDouble::max()) = 0;

   /**
     * Construct a new block template.
     *
     * @param[in] options options for creating the block
     * @param[in] cooldown wait for tip to be connected and IBD to complete.
     *                     If the best header is ahead of the tip, wait for the
     *                     tip to catch up. It's recommended to disable this on
     *                     regtest and signets with only one miner, as these
     *                     could stall.
     * @retval BlockTemplate a block template.
     * @retval std::nullptr if the node is shut down or interrupt() is called.
     */
    virtual std::unique_ptr<BlockTemplate> createNewBlock(const node::BlockCreateOptions& options = {}, bool cooldown = true) = 0;

    /**
     * Interrupts createNewBlock and waitTipChanged.
     */
    virtual void interrupt() = 0;

    /**
     * Checks if a given block is valid.
     *
     * @param[in] block       the block to check
     * @param[in] options     verification options: the proof-of-work check can be
     *                        skipped in order to verify a template generated by
     *                        external software.
     * @param[out] reason     failure reason (BIP22)
     * @param[out] debug      more detailed rejection reason
     * @returns               whether the block is valid
     *
     * For signets the challenge verification is skipped when check_pow is false.
     */
    virtual bool checkBlock(const CBlock& block, const node::BlockCheckOptions& options, std::string& reason, std::string& debug) = 0;

    /**
     * Process a fully assembled block.
     *
     * Similar to the submitblock RPC. Accepts a complete block, validates
     * it, and if accepted as new, processes it into chainstate. Accepted
     * blocks may then be announced to peers through normal validation signals.
     *
     * @param[in]  block  the complete block to submit
     * @param[out] reason failure reason (BIP22)
     * @param[out] debug  more detailed rejection reason
     * @returns           true if the block was accepted as a new block. Returns
     *                    false and sets reason if the block is a duplicate or
     *                    the validation result is inconclusive.
     *
     * @note Unlike the submitblock RPC, this method does not call
     *       UpdateUncommittedBlockStructures to add a missing coinbase witness
     *       reserved value. Callers must submit a fully formed block, including
     *       the coinbase witness when a witness commitment is present.
     */
    virtual bool submitBlock(const CBlock& block, std::string& reason, std::string& debug) = 0;

    /**
     * Fetch raw transactions from the mempool by txid.
     *
     * @param[in] txids   transaction ids to look up
     * @returns           one entry per requested txid containing the
     *                    transaction if found, otherwise nullptr
     */
    virtual std::vector<CTransactionRef> getTransactionsByTxID(const std::vector<Txid>& txids) = 0;

    /**
     * Fetch raw transactions from the mempool by wtxid.
     *
     * @param[in] wtxids   witness transaction ids to look up
     * @returns            one entry per requested wtxid containing the
     *                     transaction if found, otherwise nullptr
     */
    virtual std::vector<CTransactionRef> getTransactionsByWitnessID(const std::vector<Wtxid>& wtxids) = 0;

    //! Get internal node context. Useful for RPC and testing,
    //! but not accessible across processes.
    virtual const node::NodeContext* context() { return nullptr; }
};

//! Return implementation of Mining interface.
//!
//! @param[in] wait_loaded waits for chainstate data to be loaded before
//!                        returning. Used to prevent external clients from
//!                        being able to crash the node during startup.
std::unique_ptr<Mining> MakeMining(const node::NodeContext& node, bool wait_loaded=true);

} // namespace interfaces

#endif // BITCOIN_INTERFACES_MINING_H

Coverage Report

Created: 2026-07-23 20:35

Line	Count	Source
1		// Copyright (c) 2024-present The Bitcoin Core developers
2		// Distributed under the MIT software license, see the accompanying
3		// file COPYING or http://www.opensource.org/licenses/mit-license.php.
4
5		#ifndef BITCOIN_INTERFACES_MINING_H
6		#define BITCOIN_INTERFACES_MINING_H
7
8		#include <consensus/amount.h>
9		#include <interfaces/types.h>
10		#include <node/mining_types.h>
11		#include <primitives/block.h>
12		#include <primitives/transaction.h>
13		#include <uint256.h>
14		#include <util/time.h>
15
16		#include <cstdint>
17		#include <memory>
18		#include <optional>
19		#include <stdexcept>
20		#include <string>
21		#include <vector>
22
23		namespace node {
24		struct NodeContext;
25		} // namespace node
26
27		namespace interfaces {
28
29		//! Block template interface
30		class BlockTemplate
31		{
32		public:
33	47.9k	virtual ~BlockTemplate() = default;
34
35		virtual CBlockHeader getBlockHeader() = 0;
36		// Block contains a dummy coinbase transaction that should not be used and
37		// it may not match a transaction constructed from getCoinbaseTx().
38		virtual CBlock getBlock() = 0;
39
40		// Fees per transaction, not including coinbase transaction.
41		virtual std::vector<CAmount> getTxFees() = 0;
42		// Sigop cost per transaction, not including coinbase transaction.
43		virtual std::vector<int64_t> getTxSigops() = 0;
44
45		/** Return fields needed to construct a coinbase transaction */
46		virtual node::CoinbaseTx getCoinbaseTx() = 0;
47
48		/**
49		* Compute merkle path to the coinbase transaction
50		*
51		* @return merkle path ordered from the deepest
52		*/
53		virtual std::vector<uint256> getCoinbaseMerklePath() = 0;
54
55		/**
56		* Construct and broadcast the block. Modifies the template in place,
57		* updating the fields listed below as well as the merkle root.
58		*
59		* @param[in] version version block header field
60		* @param[in] timestamp time block header field (unix timestamp)
61		* @param[in] nonce nonce block header field
62		* @param[in] coinbase complete coinbase transaction (including witness)
63		* @param[out] reason failure reason (BIP22)
64		* @param[out] debug more detailed rejection reason
65		*
66		* @note Unlike the submitblock RPC, this method does not call
67		* UpdateUncommittedBlockStructures to add a missing coinbase witness
68		* reserved value. Callers must provide a complete coinbase transaction,
69		* including the witness when a witness commitment is present.
70		*
71		* @note for heights <= 16, the BIP34 height push in getCoinbaseTx().script_sig_prefix
72		* is only one byte long, so the coinbase scriptSig needs at least
73		* one additional byte of data to avoid bad-cb-length.
74		*
75		* @returns true if the block was accepted as a new block
76		*/
77		virtual bool submitSolution(uint32_t version, uint32_t timestamp, uint32_t nonce, CTransactionRef coinbase, std::string& reason, std::string& debug) = 0;
78
79		//! Deprecated older method preserved to return an explicit error for IPC
80		//! clients using mining.capnp @7.
81		virtual bool submitSolutionOld7(uint32_t, uint32_t, uint32_t, CTransactionRef)
82	55	{
83	55	throw std::runtime_error("Old submitSolution (@7) not supported. Please update your client!");
84	55	}
85
86		/**
87		* Waits for fees in the next block to rise, a new tip or the timeout.
88		*
89		* @param[in] options Control the timeout (default forever) and by how much total fees
90		* for the next block should rise (default infinite).
91		*
92		* @returns a new BlockTemplate or nothing if the timeout occurs.
93		*
94		* On testnet this will additionally return a template with difficulty 1 if
95		* the tip is more than 20 minutes old.
96		*/
97		virtual std::unique_ptr<BlockTemplate> waitNext(node::BlockWaitOptions options = {}) = 0;
98
99		/**
100		* Interrupts the current wait for the next block template.
101		*/
102		virtual void interruptWait() = 0;
103		};
104
105		//! Interface giving clients (RPC, Stratum v2 Template Provider in the future)
106		//! ability to create block templates.
107		class Mining
108		{
109		public:
110	9.44k	virtual ~Mining() = default;
111
112		//! If this chain is exclusively used for testing
113		virtual bool isTestChain() = 0;
114
115		//! Returns whether IBD is still in progress.
116		virtual bool isInitialBlockDownload() = 0;
117
118		//! Returns the hash and height for the tip of this chain
119		virtual std::optional<BlockRef> getTip() = 0;
120
121		/**
122		* Waits for the connected tip to change. During node initialization, this will
123		* wait until the tip is connected (regardless of `timeout`).
124		*
125		* @param[in] current_tip block hash of the current chain tip. Function waits
126		* for the chain tip to differ from this.
127		* @param[in] timeout how long to wait for a new tip (default is forever)
128		*
129		* @retval BlockRef hash and height of the current chain tip after this call.
130		* @retval std::nullopt if the node is shut down or interrupt() is called.
131		*/
132		virtual std::optional<BlockRef> waitTipChanged(uint256 current_tip, MillisecondsDouble timeout = MillisecondsDouble::max()) = 0;
133
134		/**
135		* Construct a new block template.
136		*
137		* @param[in] options options for creating the block
138		* @param[in] cooldown wait for tip to be connected and IBD to complete.
139		* If the best header is ahead of the tip, wait for the
140		* tip to catch up. It's recommended to disable this on
141		* regtest and signets with only one miner, as these
142		* could stall.
143		* @retval BlockTemplate a block template.
144		* @retval std::nullptr if the node is shut down or interrupt() is called.
145		*/
146		virtual std::unique_ptr<BlockTemplate> createNewBlock(const node::BlockCreateOptions& options = {}, bool cooldown = true) = 0;
147
148		/**
149		* Interrupts createNewBlock and waitTipChanged.
150		*/
151		virtual void interrupt() = 0;
152
153		/**
154		* Checks if a given block is valid.
155		*
156		* @param[in] block the block to check
157		* @param[in] options verification options: the proof-of-work check can be
158		* skipped in order to verify a template generated by
159		* external software.
160		* @param[out] reason failure reason (BIP22)
161		* @param[out] debug more detailed rejection reason
162		* @returns whether the block is valid
163		*
164		* For signets the challenge verification is skipped when check_pow is false.
165		*/
166		virtual bool checkBlock(const CBlock& block, const node::BlockCheckOptions& options, std::string& reason, std::string& debug) = 0;
167
168		/**
169		* Process a fully assembled block.
170		*
171		* Similar to the submitblock RPC. Accepts a complete block, validates
172		* it, and if accepted as new, processes it into chainstate. Accepted
173		* blocks may then be announced to peers through normal validation signals.
174		*
175		* @param[in] block the complete block to submit
176		* @param[out] reason failure reason (BIP22)
177		* @param[out] debug more detailed rejection reason
178		* @returns true if the block was accepted as a new block. Returns
179		* false and sets reason if the block is a duplicate or
180		* the validation result is inconclusive.
181		*
182		* @note Unlike the submitblock RPC, this method does not call
183		* UpdateUncommittedBlockStructures to add a missing coinbase witness
184		* reserved value. Callers must submit a fully formed block, including
185		* the coinbase witness when a witness commitment is present.
186		*/
187		virtual bool submitBlock(const CBlock& block, std::string& reason, std::string& debug) = 0;
188
189		/**
190		* Fetch raw transactions from the mempool by txid.
191		*
192		* @param[in] txids transaction ids to look up
193		* @returns one entry per requested txid containing the
194		* transaction if found, otherwise nullptr
195		*/
196		virtual std::vector<CTransactionRef> getTransactionsByTxID(const std::vector<Txid>& txids) = 0;
197
198		/**
199		* Fetch raw transactions from the mempool by wtxid.
200		*
201		* @param[in] wtxids witness transaction ids to look up
202		* @returns one entry per requested wtxid containing the
203		* transaction if found, otherwise nullptr
204		*/
205		virtual std::vector<CTransactionRef> getTransactionsByWitnessID(const std::vector<Wtxid>& wtxids) = 0;
206
207		//! Get internal node context. Useful for RPC and testing,
208		//! but not accessible across processes.
209	0	virtual const node::NodeContext* context() { return nullptr; }
210		};
211
212		//! Return implementation of Mining interface.
213		//!
214		//! @param[in] wait_loaded waits for chainstate data to be loaded before
215		//! returning. Used to prevent external clients from
216		//! being able to crash the node during startup.
217		std::unique_ptr<Mining> MakeMining(const node::NodeContext& node, bool wait_loaded=true);
218
219		} // namespace interfaces
220
221		#endif // BITCOIN_INTERFACES_MINING_H