text: // Copyright (c) 2009-2019 The Beans Core developers
  // Distributed under the MIT software license, see the accompanying
  // file COPYING or http://www.opensource.org/licenses/mit-license.php.
  
  #ifndef BEANS_NODE_PSBT_H
  #define BEANS_NODE_PSBT_H
  
  #include <psbt.h>
  
  #include <optional>
  
  /**
   * Holds an analysis of one input from a PSBT
   */
  struct PSBTInputAnalysis {
      bool has_utxo; //!< Whether we have UTXO information for this input
      bool is_final; //!< Whether the input has all required information including signatures
      PSBTRole next; //!< Which of the BIP 174 roles needs to handle this input next
  
      std::vector<CKeyID> missing_pubkeys; //!< Pubkeys whose BIP32 derivation path is missing
      std::vector<CKeyID> missing_sigs;    //!< Pubkeys whose signatures are missing
      uint160 missing_redeem_script;       //!< Hash160 of redeem script, if missing
      uint256 missing_witness_script;      //!< SHA256 of witness script, if missing
  };
  
  /**
   * Holds the results of AnalyzePSBT (miscellaneous information about a PSBT)
   */
  struct PSBTAnalysis {
      std::optional<size_t> estimated_vsize;      //!< Estimated weight of the transaction
      std::optional<CFeeRate> estimated_feerate;  //!< Estimated feerate (fee / weight) of the transaction
      std::optional<CAmount> fee;                 //!< Amount of fee being paid by the transaction
      std::vector<PSBTInputAnalysis> inputs;      //!< More information about the individual inputs of the transaction
      PSBTRole next;                              //!< Which of the BIP 174 roles needs to handle the transaction next
      std::string error;                          //!< Error message
  
      void SetInvalid(std::string err_msg)
      {
          estimated_vsize = std::nullopt;
          estimated_feerate = std::nullopt;
          fee = std::nullopt;
          inputs.clear();
          next = PSBTRole::CREATOR;
          error = err_msg;
      }
  };
  
  /**
   * Provides helpful miscellaneous information about where a PSBT is in the signing workflow.
   *
   * @param[in] psbtx the PSBT to analyze
   * @return A PSBTAnalysis with information about the provided PSBT.
   */
  PSBTAnalysis AnalyzePSBT(PartiallySignedTransaction psbtx);
  
  #endif // BEANS_NODE_PSBT_H
  