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       1                 :            : // Copyright (c) 2009-2021 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                 :            : #include <optional>
      11                 :            : 
      12                 :            : namespace node {
      13                 :            : /**
      14                 :            :  * Holds an analysis of one input from a PSBT
      15                 :            :  */
      16         [ #  # ]:          0 : struct PSBTInputAnalysis {
      17                 :            :     bool has_utxo; //!< Whether we have UTXO information for this input
      18                 :            :     bool is_final; //!< Whether the input has all required information including signatures
      19                 :            :     PSBTRole next; //!< Which of the BIP 174 roles needs to handle this input next
      20                 :            : 
      21                 :            :     std::vector<CKeyID> missing_pubkeys; //!< Pubkeys whose BIP32 derivation path is missing
      22                 :            :     std::vector<CKeyID> missing_sigs;    //!< Pubkeys whose signatures are missing
      23                 :            :     uint160 missing_redeem_script;       //!< Hash160 of redeem script, if missing
      24                 :            :     uint256 missing_witness_script;      //!< SHA256 of witness script, if missing
      25                 :            : };
      26                 :            : 
      27                 :            : /**
      28                 :            :  * Holds the results of AnalyzePSBT (miscellaneous information about a PSBT)
      29                 :            :  */
      30                 :            : struct PSBTAnalysis {
      31                 :            :     std::optional<size_t> estimated_vsize;      //!< Estimated weight of the transaction
      32                 :            :     std::optional<CFeeRate> estimated_feerate;  //!< Estimated feerate (fee / weight) of the transaction
      33                 :            :     std::optional<CAmount> fee;                 //!< Amount of fee being paid by the transaction
      34                 :            :     std::vector<PSBTInputAnalysis> inputs;      //!< More information about the individual inputs of the transaction
      35                 :            :     PSBTRole next;                              //!< Which of the BIP 174 roles needs to handle the transaction next
      36                 :            :     std::string error;                          //!< Error message
      37                 :            : 
      38                 :          0 :     void SetInvalid(std::string err_msg)
      39                 :            :     {
      40                 :          0 :         estimated_vsize = std::nullopt;
      41                 :          0 :         estimated_feerate = std::nullopt;
      42                 :          0 :         fee = std::nullopt;
      43                 :          0 :         inputs.clear();
      44                 :          0 :         next = PSBTRole::CREATOR;
      45                 :          0 :         error = err_msg;
      46                 :          0 :     }
      47                 :            : };
      48                 :            : 
      49                 :            : /**
      50                 :            :  * Provides helpful miscellaneous information about where a PSBT is in the signing workflow.
      51                 :            :  *
      52                 :            :  * @param[in] psbtx the PSBT to analyze
      53                 :            :  * @return A PSBTAnalysis with information about the provided PSBT.
      54                 :            :  */
      55                 :            : PSBTAnalysis AnalyzePSBT(PartiallySignedTransaction psbtx);
      56                 :            : } // namespace node
      57                 :            : 
      58                 :            : #endif // BITCOIN_NODE_PSBT_H