1 // Copyright (c) 2009-2019 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_NODE_PSBT_H
6 #define BITCOIN_NODE_PSBT_H
7 
8 #include <psbt.h>
9 
10 /**
11  * Holds an analysis of one input from a PSBT
12  */
13 struct PSBTInputAnalysis {
14     bool has_utxo; //!< Whether we have UTXO information for this input
15     bool is_final; //!< Whether the input has all required information including signatures
16     PSBTRole next; //!< Which of the BIP 174 roles needs to handle this input next
17 
18     std::vector<CKeyID> missing_pubkeys; //!< Pubkeys whose BIP32 derivation path is missing
19     std::vector<CKeyID> missing_sigs;    //!< Pubkeys whose signatures are missing
20     uint160 missing_redeem_script;       //!< Hash160 of redeem script, if missing
21     uint256 missing_witness_script;      //!< SHA256 of witness script, if missing
22 };
23 
24 /**
25  * Holds the results of AnalyzePSBT (miscellaneous information about a PSBT)
26  */
27 struct PSBTAnalysis {
28     Optional<size_t> estimated_vsize;      //!< Estimated weight of the transaction
29     Optional<CFeeRate> estimated_feerate;  //!< Estimated feerate (fee / weight) of the transaction
30     Optional<CAmount> fee;                 //!< Amount of fee being paid by the transaction
31     std::vector<PSBTInputAnalysis> inputs; //!< More information about the individual inputs of the transaction
32     PSBTRole next;                         //!< Which of the BIP 174 roles needs to handle the transaction next
33     std::string error;                     //!< Error message
34 
SetInvalidPSBTAnalysis35     void SetInvalid(std::string err_msg)
36     {
37         estimated_vsize = nullopt;
38         estimated_feerate = nullopt;
39         fee = nullopt;
40         inputs.clear();
41         next = PSBTRole::CREATOR;
42         error = err_msg;
43     }
44 };
45 
46 /**
47  * Provides helpful miscellaneous information about where a PSBT is in the signing workflow.
48  *
49  * @param[in] psbtx the PSBT to analyze
50  * @return A PSBTAnalysis with information about the provided PSBT.
51  */
52 PSBTAnalysis AnalyzePSBT(PartiallySignedTransaction psbtx);
53 
54 #endif // BITCOIN_NODE_PSBT_H
55