diff --git a/dap_chain_wallet.c b/dap_chain_wallet.c
new file mode 100644
index 0000000000000000000000000000000000000000..0bacc351965932dc0322dd9436f13cb49dee7f2f
--- /dev/null
+++ b/dap_chain_wallet.c
@@ -0,0 +1,86 @@
+/*
+ * Authors:
+ * Dmitriy A. Gearasimov <kahovski@gmail.com>
+ * DeM Labs Inc. https://demlabs.net
+ * DeM Labs Open source community https://github.com/demlabsinc
+ * Copyright (c) 2017-2018
+ * All rights reserved.
+
+ This file is part of DAP (Deus Applications Prototypes) the open source project
+
+ DAP (Deus Applicaions Prototypes) is free software: you can redistribute it and/or modify
+ it under the terms of the GNU General Public License as published by
+ the Free Software Foundation, either version 3 of the License, or
+ (at your option) any later version.
+
+ DAP is distributed in the hope that it will be useful,
+ but WITHOUT ANY WARRANTY; without even the implied warranty of
+ MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ GNU General Public License for more details.
+
+ You should have received a copy of the GNU General Public License
+ along with any DAP based project. If not, see <http://www.gnu.org/licenses/>.
+*/
+
+#include "dap_common.h"
+#include "dap_chain_wallet.h"
+#include "dap_chain_wallet_internal.h"
+
+#define LOG_TAG "dap_chain_wallet"
+
+/**
+ * @brief dap_chain_wallet_open
+ * @param a_file_name
+ * @param a_sig_type
+ * @details Creates new one if not found
+ * @return Wallet, new wallet or NULL if errors
+ */
+dap_chain_wallet_t * dap_chain_wallet_open(const char * a_file_name, dap_chain_sig_type_t a_sig_type)
+{
+ dap_chain_wallet_t * l_wallet = DAP_NEW_Z(dap_chain_wallet_t);
+ DAP_CHAIN_WALLET_INTERNAL_LOCAL_NEW(l_wallet);
+ return l_wallet;
+}
+
+/**
+ * @brief dap_chain_wallet_close
+ * @param a_wallet
+ */
+void dap_chain_wallet_close( dap_chain_wallet_t * a_wallet)
+{
+ DAP_CHAIN_WALLET_INTERNAL_LOCAL(a_wallet);
+ DAP_DELETE(l_wallet_internal);
+ DAP_DELETE(a_wallet);
+}
+
+/**
+ * @brief dap_chain_wallet_get_pkey
+ * @param a_wallet
+ * @param a_pkey_idx
+ * @param a_pkey
+ * @param a_pkey_size_max
+ * @return 0 if everything is ok, negative value if error
+ */
+int dap_chain_wallet_get_pkey( dap_chain_wallet_t * a_wallet,uint32_t a_pkey_idx, void * a_pkey, size_t a_pkey_size_max)
+{
+ DAP_CHAIN_WALLET_INTERNAL_LOCAL(a_wallet);
+ return 0;
+}
+
+/**
+ * @brief dap_chain_wallet_sign
+ * @param a_wallet
+ * @param a_pkey_idx
+ * @param a_data
+ * @param a_data_size
+ * @param a_sign
+ * @param a_sign_size_max
+ * @return 0 if everything is ok, negative value if error
+ */
+int dap_chain_wallet_sign( dap_chain_wallet_t * a_wallet,uint32_t a_pkey_idx, const void * a_data, size_t a_data_size,
+ void * a_sign, size_t a_sign_size_max)
+{
+ DAP_CHAIN_WALLET_INTERNAL_LOCAL(a_wallet);
+
+ return 0;
+}
diff --git a/dap_chain_wallet.h b/dap_chain_wallet.h
new file mode 100644
index 0000000000000000000000000000000000000000..e27f402465ca1add7a433f9d5bce4940793fabe9
--- /dev/null
+++ b/dap_chain_wallet.h
@@ -0,0 +1,38 @@
+/*
+ * Authors:
+ * Dmitriy A. Gearasimov <kahovski@gmail.com>
+ * DeM Labs Inc. https://demlabs.net
+ * DeM Labs Open source community https://github.com/demlabsinc
+ * Copyright (c) 2017-2018
+ * All rights reserved.
+
+ This file is part of DAP (Deus Applications Prototypes) the open source project
+
+ DAP (Deus Applicaions Prototypes) is free software: you can redistribute it and/or modify
+ it under the terms of the GNU General Public License as published by
+ the Free Software Foundation, either version 3 of the License, or
+ (at your option) any later version.
+
+ DAP is distributed in the hope that it will be useful,
+ but WITHOUT ANY WARRANTY; without even the implied warranty of
+ MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ GNU General Public License for more details.
+
+ You should have received a copy of the GNU General Public License
+ along with any DAP based project. If not, see <http://www.gnu.org/licenses/>.
+*/
+
+#pragma once
+#include "dap_chain_common.h"
+typedef struct dap_chain_wallet{
+ void * _internal;
+ void * _inheritor;
+} dap_chain_wallet_t;
+
+dap_chain_wallet_t * dap_chain_wallet_open(const char * a_file_name, dap_chain_sig_type_t a_sig_type); // Creates new one if not found
+void dap_chain_wallet_close( dap_chain_wallet_t * a_wallet);
+
+int dap_chain_wallet_get_pkey( dap_chain_wallet_t * a_wallet,uint32_t a_pkey_idx, void * a_pkey, size_t a_pkey_size_max);
+
+int dap_chain_wallet_sign( dap_chain_wallet_t * a_wallet,uint32_t a_pkey_idx, const void * a_data, size_t a_data_size, void * a_sign, size_t a_sign_size_max);
+
diff --git a/dap_chain_wallet_internal.h b/dap_chain_wallet_internal.h
new file mode 100644
index 0000000000000000000000000000000000000000..fd5146060394afd9795ea059729f0c023d744b0f
--- /dev/null
+++ b/dap_chain_wallet_internal.h
@@ -0,0 +1,66 @@
+/*
+ * Authors:
+ * Dmitriy A. Gearasimov <kahovski@gmail.com>
+ * DeM Labs Inc. https://demlabs.net
+ * DeM Labs Open source community https://github.com/demlabsinc
+ * Copyright (c) 2017-2018
+ * All rights reserved.
+
+ This file is part of DAP (Deus Applications Prototypes) the open source project
+
+ DAP (Deus Applicaions Prototypes) is free software: you can redistribute it and/or modify
+ it under the terms of the GNU General Public License as published by
+ the Free Software Foundation, either version 3 of the License, or
+ (at your option) any later version.
+
+ DAP is distributed in the hope that it will be useful,
+ but WITHOUT ANY WARRANTY; without even the implied warranty of
+ MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ GNU General Public License for more details.
+
+ You should have received a copy of the GNU General Public License
+ along with any DAP based project. If not, see <http://www.gnu.org/licenses/>.
+*/
+
+#pragma once
+
+#include "dap_enc_key.h"
+#include "dap_chain_common.h"
+
+#include "dap_chain_wallet.h"
+
+#define DAP_CHAIN_WALLET_FILE_SIGNATURE 0x1a167bef15feea18
+
+typedef struct dap_chain_wallet_key{
+ struct {
+ dap_chain_sig_type_t sig_type; /// Signature type
+ uint32_t key_size; /// Private key size
+ } header;
+ uint8_t key_raw[]; /// Raw data of the private key
+} DAP_ALIGN_PACKED dap_chain_wallet_key_t;
+
+
+typedef struct dap_chain_wallet_file
+{
+ struct {
+ uint64_t signature;
+ uint32_t version;
+ uint8_t type; /// Wallet storage type 0x00 - uncompressed and unencrypted
+ uint64_t keys_size;
+ } DAP_ALIGN_PACKED header;
+ uint8_t keys[];
+} DAP_ALIGN_PACKED dap_chain_wallet_file_t;
+
+typedef struct dap_chain_wallet_internal
+{
+ dap_chain_addr_t addr;
+ char * file_name;
+ size_t keys_count;
+ dap_enc_key_t ** keys;
+} dap_chain_wallet_internal_t;
+
+#define DAP_CHAIN_WALLET_INTERNAL(a) ((dap_chain_wallet_internal_t *) a->_internal )
+
+#define DAP_CHAIN_WALLET_INTERNAL_LOCAL(a) dap_chain_wallet_internal_t * l_wallet_internal = DAP_CHAIN_WALLET_INTERNAL(a)
+
+#define DAP_CHAIN_WALLET_INTERNAL_LOCAL_NEW(a) dap_chain_wallet_internal_t * l_wallet_internal = DAP_NEW_Z(dap_chain_wallet_internal_t); a->_internal = l_wallet_internal