Split key_io (address/key encodings) off from base58

src/key_io.h

@@ -0,0 +1,40 @@
+// Copyright (c) 2009-2010 Satoshi Nakamoto
+// Copyright (c) 2009-2015 The Bitcoin Core developers
+// Copyright (c) 2016-2018 The Zcash developers
+// Distributed under the MIT software license, see the accompanying
+// file COPYING or http://www.opensource.org/licenses/mit-license.php.
+
+#ifndef BITCOIN_KEYIO_H
+#define BITCOIN_KEYIO_H
+
+#include <chainparams.h>
+#include <key.h>
+#include <pubkey.h>
+#include <script/standard.h>
+#include <zcash/Address.hpp>
+
+#include <string>
+
+CKey DecodeSecret(const std::string& str);
+std::string EncodeSecret(const CKey& key);
+
+CExtKey DecodeExtKey(const std::string& str);
+std::string EncodeExtKey(const CExtKey& extkey);
+CExtPubKey DecodeExtPubKey(const std::string& str);
+std::string EncodeExtPubKey(const CExtPubKey& extpubkey);
+
+std::string EncodeDestination(const CTxDestination& dest);
+CTxDestination DecodeDestination(const std::string& str);
+bool IsValidDestinationString(const std::string& str);
+bool IsValidDestinationString(const std::string& str, const CChainParams& params);
+
+std::string EncodePaymentAddress(const libzcash::PaymentAddress& zaddr);
+boost::optional<libzcash::PaymentAddress> DecodePaymentAddress(const std::string& str);
+
+std::string EncodeViewingKey(const libzcash::ViewingKey& vk);
+boost::optional<libzcash::ViewingKey> DecodeViewingKey(const std::string& str);
+
+std::string EncodeSpendingKey(const libzcash::SpendingKey& zkey);
+boost::optional<libzcash::SpendingKey> DecodeSpendingKey(const std::string& str);
+
+#endif // BITCOIN_KEYIO_H