1 // Copyright (c) 2019-2020 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_SIGNET_H
6 #define BITCOIN_SIGNET_H
7 
8 #include <consensus/params.h>
9 #include <primitives/block.h>
10 #include <primitives/transaction.h>
11 
12 #include <optional>
13 
14 /**
15  * Extract signature and check whether a block has a valid solution
16  */
17 bool CheckSignetBlockSolution(const CBlock& block, const Consensus::Params& consensusParams);
18 
19 /**
20  * Generate the signet tx corresponding to the given block
21  *
22  * The signet tx commits to everything in the block except:
23  * 1. It hashes a modified merkle root with the signet signature removed.
24  * 2. It skips the nonce.
25  */
26 class SignetTxs {
27     template<class T1, class T2>
SignetTxs(const T1 & to_spend,const T2 & to_sign)28     SignetTxs(const T1& to_spend, const T2& to_sign) : m_to_spend{to_spend}, m_to_sign{to_sign} { }
29 
30 public:
31     static std::optional<SignetTxs> Create(const CBlock& block, const CScript& challenge);
32 
33     const CTransaction m_to_spend;
34     const CTransaction m_to_sign;
35 };
36 
37 #endif // BITCOIN_SIGNET_H
38