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// Copyright (c) 2018-2021 The Bitcoin Core developers
// Distributed under the MIT software license, see the accompanying
// file COPYING or http://www.opensource.org/licenses/mit-license.php.
#ifndef BITCOIN_EXTERNAL_SIGNER_H
#define BITCOIN_EXTERNAL_SIGNER_H
#include <univalue.h>
#include <util/system.h>
#include <string>
#include <vector>
struct PartiallySignedTransaction;
//! Enables interaction with an external signing device or service, such as
//! a hardware wallet. See doc/external-signer.md
class ExternalSigner
{
private:
//! The command which handles interaction with the external signer.
std::string m_command;
//! Bitcoin mainnet, testnet, etc
std::string m_chain;
std::string NetworkArg() const;
public:
//! @param[in] command the command which handles interaction with the external signer
//! @param[in] fingerprint master key fingerprint of the signer
//! @param[in] chain "main", "test", "regtest" or "signet"
//! @param[in] name device name
ExternalSigner(const std::string& command, const std::string chain, const std::string& fingerprint, const std::string name);
//! Master key fingerprint of the signer
std::string m_fingerprint;
//! Name of signer
std::string m_name;
//! Obtain a list of signers. Calls `<command> enumerate`.
//! @param[in] command the command which handles interaction with the external signer
//! @param[in,out] signers vector to which new signers (with a unique master key fingerprint) are added
//! @param chain "main", "test", "regtest" or "signet"
//! @returns success
static bool Enumerate(const std::string& command, std::vector<ExternalSigner>& signers, const std::string chain);
//! Display address on the device. Calls `<command> displayaddress --desc <descriptor>`.
//! @param[in] descriptor Descriptor specifying which address to display.
//! Must include a public key or xpub, as well as key origin.
UniValue DisplayAddress(const std::string& descriptor) const;
//! Get receive and change Descriptor(s) from device for a given account.
//! Calls `<command> getdescriptors --account <account>`
//! @param[in] account which BIP32 account to use (e.g. `m/44'/0'/account'`)
//! @returns see doc/external-signer.md
UniValue GetDescriptors(const int account);
//! Sign PartiallySignedTransaction on the device.
//! Calls `<command> signtransaction` and passes the PSBT via stdin.
//! @param[in,out] psbt PartiallySignedTransaction to be signed
bool SignTransaction(PartiallySignedTransaction& psbt, std::string& error);
};
#endif // BITCOIN_EXTERNAL_SIGNER_H
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