Initial Vexta Core v0.1.0 release

src/node/psbt.h

@@ -0,0 +1,56 @@
+// Copyright (c) 2009-2019 The DigiByte Core developers
+// Distributed under the MIT software license, see the accompanying
+// file COPYING or http://www.opensource.org/licenses/mit-license.php.
+
+#ifndef DIGIBYTE_NODE_PSBT_H
+#define DIGIBYTE_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 // DIGIBYTE_NODE_PSBT_H