libdap-chain-common/include/dap_chain_datum_hashtree_roots.h

+/*
+ * 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_common.h"
+#include "dap_chain_common.h"
+
+/**
+  * @struct dap_chain_datum_hashtree_roots_v1
+  * @brief Hash tree roots for block, version 1
+  */
+typedef struct dap_chain_datum_hashtree_roots_v1{
+    dap_chain_hash_fast_t main;
+} DAP_ALIGN_PACKED dap_chain_block_roots_v1_t;
+
+/**
+  * @struct dap_chain_datum_hashtree_roots_v2
+  * @brief Hash tree roots for block, version 2
+  */
+typedef struct dap_chain_datum_hashtree_roots_v2{
+    dap_chain_hash_fast_t main;
+    dap_chain_hash_fast_t txs;
+} DAP_ALIGN_PACKED dap_chain_datum_hashtree_roots_v2_t;
+
+typedef dap_chain_datum_hashtree_roots_v2_t dap_chain_datum_hashtree_roots_t;
+

libdap-chain-common/include/dap_chain_datum_token.h

+/*
+ * Authors:
+ * Dmitriy A. Gearasimov <gerasimov.dmitriy@demlabs.net>
+ * DeM Labs Inc.   https://demlabs.net
+ * CellFrame       https://cellframe.net
+ * Sources         https://gitlab.demlabs.net/cellframe
+ * Copyright  (c) 2017-2019
+ * All rights reserved.
+
+ This file is part of CellFrame SDK the open source project
+
+    CellFrame SDK 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.
+
+    CellFrame SDK 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 CellFrame SDK based project.  If not, see <http://www.gnu.org/licenses/>.
+*/
+#pragma once
+#include "dap_chain_common.h"
+#include "dap_sign.h"
+
+
+
+// Token declaration
+typedef struct dap_chain_datum_token{
+    uint16_t type;
+    char ticker[DAP_CHAIN_TICKER_SIZE_MAX];
+    union {
+        // Simple private token declaration. Useful for 100% premined emission without any plays with token and owners after that
+        struct {
+            uint64_t total_supply; // Could be zero if unlimited
+            uint16_t signs_valid; // Emission auth signs
+            uint16_t signs_total; // Emission auth signs
+        } DAP_ALIGN_PACKED header_private;
+        // Private token declarations, with flags, manipulations and updates
+        struct {
+            uint16_t flags; // Token declaration flags
+            size_t tsd_data_size; // Data size section with values in key-length-value list trailing the signs section
+        } DAP_ALIGN_PACKED header_private_decl;
+        // Private token update
+        struct {
+            uint16_t flags; // Update flag - clear all before, add or etc
+            size_t klv_data_size; // Data size section with extended values in key-length-value list.
+        } DAP_ALIGN_PACKED header_private_update;
+        // Public token declaration
+        struct {
+            uint128_t total_supply;
+            uint128_t premine_supply;
+            dap_chain_addr_t premine_address;
+            uint32_t flags;
+        } DAP_ALIGN_PACKED header_public;
+    };
+    byte_t data[]; // Signs or types-size-data sections if exists
+} DAP_ALIGN_PACKED dap_chain_datum_token_t;
+
+// Token declaration type
+// Simple private token decl
+#define DAP_CHAIN_DATUM_TOKEN_PRIVATE        0x0001
+// Extended declaration of privatetoken with in-time control
+#define DAP_CHAIN_DATUM_TOKEN_PRIVATE_DECL   0x0002
+// Token update
+#define DAP_CHAIN_DATUM_TOKEN_PRIVATE_UPDATE 0x0003
+// Open token with now ownership
+#define DAP_CHAIN_DATUM_TOKEN_PUBLIC          0x0004
+
+
+// Macros for token flags
+/// ------- Global section flags --------
+// Blocked all permissions, usefull issue it by default and then allow what you want to allow
+#define DAP_CHAIN_DATUM_TOKEN_FLAG_ALL_BLOCKED                             0x0001
+// Allowed all permissions if not blocked them. Be careful with this mode
+#define DAP_CHAIN_DATUM_TOKEN_FLAG_ALL_ALLOWED                             0x0002
+// All permissions are temprorary frozen
+#define DAP_CHAIN_DATUM_TOKEN_FLAG_ALL_FROZEN                              0x0003
+// Unfrozen permissions
+#define DAP_CHAIN_DATUM_TOKEN_FLAG_ALL_UNFROZEN                            0x0004
+
+/// ------ Static configured flags
+// No token manipulations after declarations at all. Token declares staticly and can't variabed after
+#define DAP_CHAIN_DATUM_TOKEN_FLAG_STATIC_ALL                              0x0010
+
+// No token manipulations after declarations with flags.
+#define DAP_CHAIN_DATUM_TOKEN_FLAG_STATIC_FLAGS                            0x0011
+
+// No all permissions lists manipulations after declarations
+#define DAP_CHAIN_DATUM_TOKEN_FLAG_STATIC_PERMISSIONS_ALL                  0x0012
+
+// No datum type permissions lists manipulations after declarations
+#define DAP_CHAIN_DATUM_TOKEN_FLAG_STATIC_PERMISSIONS_DATUM_TYPE           0x0013
+
+// No tx sender permissions lists manipulations after declarations
+#define DAP_CHAIN_DATUM_TOKEN_FLAG_STATIC_PERMISSIONS_TX_SENDER            0x0014
+
+// No tx receiver permissions lists manipulations after declarations
+#define DAP_CHAIN_DATUM_TOKEN_FLAG_STATIC_PERMISSIONS_TX_RECEIVER          0x0015
+
+
+// TSD section - Type-Size-Data
+typedef struct dap_chain_datum_token_tsd{
+    uint16_t type; /// Section type
+    size_t size;   /// Data size trailing the section
+    byte_t data[]; /// Section's data
+} DAP_ALIGN_PACKED dap_chain_datum_token_klv_t;
+
+/// -------- General tsd types ----
+// Flags set/unsed
+#define DAP_CHAIN_DATUM_TOKEN_TSD_TYPE_SET_FLAGS           0x0001
+#define DAP_CHAIN_DATUM_TOKEN_TSD_TYPE_UNSET_FLAGS         0x0002
+
+// Total supply limits
+#define DAP_CHAIN_DATUM_TOKEN_TSD_TYPE_TOTAL_SUPPLY        0x0003
+
+// Set total signs count value to set to be valid
+#define DAP_CHAIN_DATUM_TOKEN_TSD_TYPE_TOTAL_SIGNS_VALID   0x0004
+
+// Add owner signature's pkey fingerprint
+#define DAP_CHAIN_DATUM_TOKEN_TSD_TYPE_TOTAL_SIGNS_ADD     0x0006
+
+// Remove owner signature by pkey fingerprint
+#define DAP_CHAIN_DATUM_TOKEN_TSD_TYPE_TOTAL_SIGNS_REMOVE  0x0007
+
+
+
+/// ------- Permissions list flags, grouped by update-remove-clear operations --------
+// Allowed datum types list add, remove or clear
+#define DAP_CHAIN_DATUM_TOKEN_TSD_TYPE_DATUM_TYPE_ALLOWED_ADD          0x0010
+#define DAP_CHAIN_DATUM_TOKEN_TSD_TYPE_DATUM_TYPE_ALLOWED_REMOVE       0x0011
+#define DAP_CHAIN_DATUM_TOKEN_TSD_TYPE_DATUM_TYPE_ALLOWED_CLEAR        0x0012
+
+// Blocked datum types list add, remove or clear
+#define DAP_CHAIN_DATUM_TOKEN_TSD_TYPE_DATUM_TYPE_BLOCKED_ADD          0x0013
+#define DAP_CHAIN_DATUM_TOKEN_TSD_TYPE_DATUM_TYPE_BLOCKED_REMOVE       0x0014
+#define DAP_CHAIN_DATUM_TOKEN_TSD_TYPE_DATUM_TYPE_BLOCKED_CLEAR        0x0015
+
+//Allowed tx receiver addres list add, remove or clear
+#define DAP_CHAIN_DATUM_TOKEN_TSD_TYPE_TX_RECEIVER_ALLOWED_ADD          0x0014
+#define DAP_CHAIN_DATUM_TOKEN_TSD_TYPE_TX_RECEIVER_ALLOWED_REMOVE       0x0015
+#define DAP_CHAIN_DATUM_TOKEN_TSD_TYPE_TX_RECEIVER_ALLOWED_CLEAR        0x0016
+
+//Blocked tx receiver addres list add, remove or clear
+#define DAP_CHAIN_DATUM_TOKEN_TSD_TYPE_TX_RECEIVER_BLOCKED_ADD          0x0017
+#define DAP_CHAIN_DATUM_TOKEN_TSD_TYPE_TX_RECEIVER_BLOCKED_REMOVE       0x0018
+#define DAP_CHAIN_DATUM_TOKEN_TSD_TYPE_TX_RECEIVER_BLOCKED_CLEAR        0x0019
+
+
+//Allowed tx sender addres list add, remove or clear
+#define DAP_CHAIN_DATUM_TOKEN_TSD_TYPE_TX_SENDER_ALLOWED_ADD          0x0020
+#define DAP_CHAIN_DATUM_TOKEN_TSD_TYPE_TX_SENDER_ALLOWED_REMOVE       0x0021
+#define DAP_CHAIN_DATUM_TOKEN_TSD_TYPE_TX_SENDER_ALLOWED_CLEAR        0x0022
+
+//Blocked tx sender addres list add, remove or clear
+#define DAP_CHAIN_DATUM_TOKEN_TSD_TYPE_TX_SENDER_BLOCKED_ADD          0x0023
+#define DAP_CHAIN_DATUM_TOKEN_TSD_TYPE_TX_SENDER_BLOCKED_REMOVE       0x0024
+#define DAP_CHAIN_DATUM_TOKEN_TSD_TYPE_TX_SENDER_BLOCKED_CLEAR        0x0025
+
+
+// Token emission
+typedef struct dap_chain_datum_token_emission{
+    struct  {
+        uint8_t version;
+        uint8_t type; // Emission Type
+        char ticker[DAP_CHAIN_TICKER_SIZE_MAX];
+        dap_chain_addr_t address; // Emission holder's address
+        uint64_t value;
+    } DAP_ALIGN_PACKED hdr;
+    union {
+        struct {
+            dap_chain_addr_t addr;
+            int flags;
+            uint64_t lock_time;
+        } DAP_ALIGN_PACKED type_presale;
+        struct {
+            uint64_t value_start;// Default value. Static if nothing else is defined
+            char value_change_algo_codename[32];
+        } DAP_ALIGN_PACKED type_atom_owner;
+        struct {
+            char codename[32];
+        } DAP_ALIGN_PACKED type_algo;
+        struct {
+            uint16_t signs_count;
+            byte_t  signs[];
+        } DAP_ALIGN_PACKED type_auth;// Signs if exists
+    } data;
+} DAP_ALIGN_PACKED dap_chain_datum_token_emission_t;
+
+// Different emissions type
+#define DAP_CHAIN_DATUM_TOKEN_EMISSION_TYPE_UNDEFINED         0x00
+#define DAP_CHAIN_DATUM_TOKEN_EMISSION_TYPE_AUTH              0x01
+#define DAP_CHAIN_DATUM_TOKEN_EMISSION_TYPE_ALGO              0x02
+#define DAP_CHAIN_DATUM_TOKEN_EMISSION_TYPE_ATOM_OWNER        0x03
+#define DAP_CHAIN_DATUM_TOKEN_EMISSION_TYPE_SMART_CONTRACT    0x04
+extern const char *c_dap_chain_datum_token_emission_type_str[];

libdap-chain-common/include/dap_chain_datum_tx.h

+/*
+ * 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_datum.h"
+
+
+typedef enum dap_chain_tx_cond_type {
+    COND_SERVICE_PROVIDE = 0x20, //
+    COND_SERVICE_BILL = 0x30, //
+
+} dap_chain_tx_cond_type_t;
+
+/**
+  * @struct dap_chain_datum_tx
+  * @brief Transaction section, consists from lot of tx_items
+  */
+typedef struct dap_chain_datum_tx{
+    struct {
+        uint64_t ts_created;
+        uint32_t tx_items_size; // size of next sequencly lying tx_item sections would be decided to belong this transaction
+    } DAP_ALIGN_PACKED header;
+    uint8_t tx_items[];
+} DAP_ALIGN_PACKED dap_chain_datum_tx_t;
+
+
+/**
+ * Create empty transaction
+ *
+ * return transaction, 0 Error
+ */
+dap_chain_datum_tx_t* dap_chain_datum_tx_create(void);
+
+/**
+ * Delete transaction
+ */
+void dap_chain_datum_tx_delete(dap_chain_datum_tx_t *a_tx);
+
+/**
+ * Get size of transaction
+ *
+ * return size, 0 Error
+ */
+size_t dap_chain_datum_tx_get_size(dap_chain_datum_tx_t *a_tx);
+
+/**
+ * Insert item to transaction
+ *
+ * return 1 Ok, -1 Error
+ */
+int dap_chain_datum_tx_add_item(dap_chain_datum_tx_t **a_tx, const uint8_t *a_item);
+
+
+/**
+ * Create 'in' item and insert to transaction
+ *
+ * return 1 Ok, -1 Error
+ */
+int dap_chain_datum_tx_add_in_item(dap_chain_datum_tx_t **a_tx, dap_chain_hash_fast_t *a_tx_prev_hash,
+        uint32_t a_tx_out_prev_idx);
+
+
+/**
+ * Create 'in_cond' item and insert to transaction
+ *
+ * return 0 Ok, -1 Error
+ */
+int dap_chain_datum_tx_add_in_cond_item(dap_chain_datum_tx_t **a_tx, dap_chain_hash_fast_t *a_tx_prev_hash,
+                                        uint32_t a_tx_out_prev_idx,
+                                        uint32_t a_receipt_idx);
+
+/**
+ * Create 'out' item and insert to transaction
+ *
+ * return 1 Ok, -1 Error
+ */
+int dap_chain_datum_tx_add_out_item(dap_chain_datum_tx_t **a_tx, const dap_chain_addr_t *a_addr, uint64_t a_value);
+
+/**
+ * Create 'out_cond' item and insert to transaction
+ *
+ * return 1 Ok, -1 Error
+ */
+int dap_chain_datum_tx_add_out_cond_item(dap_chain_datum_tx_t **a_tx, dap_enc_key_t *a_key, dap_chain_net_srv_uid_t a_srv_uid,
+        uint64_t a_value, uint64_t a_value_max_per_unit, dap_chain_net_srv_price_unit_uid_t a_unit, const void *a_cond, size_t a_cond_size);
+
+/**
+* Sign a transaction (Create sign item and insert to transaction)
+ *
+ * return 1 Ok, -1 Error
+ */
+int dap_chain_datum_tx_add_sign_item(dap_chain_datum_tx_t **a_tx, dap_enc_key_t *a_key);
+
+/**
+ * Verify all sign item in transaction
+ *
+ * return 1 Ok, 0 Invalid sign, -1 Not found sing or other Error
+ */
+int dap_chain_datum_tx_verify_sign(dap_chain_datum_tx_t *a_tx);

libdap-chain-common/include/dap_chain_datum_tx_in.h

+/*
+ * 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 <stdint.h>
+#include "dap_common.h"
+#include "dap_chain_common.h"
+#include "dap_chain_datum_tx.h"
+/**
+  * @struct dap_chain_tx_item
+  * @brief Sections belongs to heading tx section, with inputs, outputs and others tx relatated items
+  */
+
+typedef struct dap_chain_tx_in{
+    struct {
+        dap_chain_tx_item_type_t type:8; /// @param    type            @brief Transaction item type
+        dap_chain_hash_fast_t tx_prev_hash; /// @param tx_prev_hash    @brief Hash of the previous transaction. 0 for generation TX
+        uint32_t tx_out_prev_idx; ///      @param   tx_prev_idx     @brief Previous tx_out index. 0 for generation TX
+//        dap_sign_type_t sig_type; /// Signature type
+//        uint32_t sig_size; /// Signature size
+    } header; /// Only header's hash is used for verification
+//    uint32_t seq_no; /// Sequence number, out of the header so could be changed during reorganization
+//    uint8_t sig[]; /// @param sig @brief raw signatura dat
+} DAP_ALIGN_PACKED dap_chain_tx_in_t;

libdap-chain-common/include/dap_chain_datum_tx_in_cond.h

+/*
+ * Authors:
+ * Dmitriy A. Gearasimov <kahovski@gmail.com>
+ * DeM Labs Inc.   https://demlabs.net
+ * DeM Labs Open source community https://github.com/demlabsinc
+ * Copyright  (c) 2017-2019
+ * 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 <stdint.h>
+#include "dap_common.h"
+#include "dap_chain_common.h"
+#include "dap_chain_datum_tx.h"
+/**
+ * @struct dap_chain_tx_item
+ * @brief Sections belongs to heading tx section, with inputs, outputs and others tx relatated items
+ */
+
+typedef struct dap_chain_tx_in_cond {
+    struct {
+        dap_chain_tx_item_type_t type :8; /// @param    type            @brief Transaction item type
+        dap_chain_hash_fast_t tx_prev_hash; /// @param tx_prev_hash    @brief Hash of the previous transaction. 0 for generation TX
+        uint32_t tx_out_prev_idx; ///      @param   tx_prev_idx     @brief Previous tx_out index. 0 for generation TX
+        uint32_t receipt_idx;
+    } header; /// Only header's hash is used for verification
+}DAP_ALIGN_PACKED dap_chain_tx_in_cond_t;

libdap-chain-common/include/dap_chain_datum_tx_items.h

+/*
+ * 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 <stdint.h>
+#include <string.h>
+//#include <glib.h>
+
+#include "dap_common.h"
+#include "dap_list.h"
+#include "dap_chain_common.h"
+#include "dap_sign.h"
+#include "dap_chain_datum_tx.h"
+#include "dap_chain_datum_tx_in.h"
+#include "dap_chain_datum_tx_out.h"
+#include "dap_chain_datum_tx_in_cond.h"
+#include "dap_chain_datum_tx_out_cond.h"
+#include "dap_chain_datum_tx_sig.h"
+#include "dap_chain_datum_tx_pkey.h"
+#include "dap_chain_datum_tx_token.h"
+#include "dap_chain_datum_tx_receipt.h"
+
+/**
+ * Get item type
+ *
+ * return type, or TX_ITEM_TYPE_ANY if error
+ */
+dap_chain_tx_item_type_t dap_chain_datum_tx_item_get_type(const uint8_t *a_item);
+
+/**
+ * Get item size
+ *
+ * return size, 0 Error
+ */
+size_t dap_chain_datum_item_tx_get_size(const uint8_t *a_item);
+
+/**
+ * Create item dap_chain_tx_token_t
+ *
+ * return item, NULL Error
+ */
+dap_chain_tx_token_t* dap_chain_datum_tx_item_token_create(dap_chain_hash_fast_t * a_datum_token_hash,const char * a_ticker);
+
+/**
+ * Create item dap_chain_tx_out_t
+ *
+ * return item, NULL Error
+ */
+dap_chain_tx_in_t* dap_chain_datum_tx_item_in_create(dap_chain_hash_fast_t *a_tx_prev_hash, uint32_t a_tx_out_prev_idx);
+
+
+dap_chain_tx_in_cond_t* dap_chain_datum_tx_item_in_cond_create(dap_chain_hash_fast_t *a_tx_prev_hash, uint32_t a_tx_out_prev_idx,
+                                                               uint32_t a_receipt_idx);
+/**
+ * Create item dap_chain_tx_out_t
+ *
+ * return item, NULL Error
+ */
+dap_chain_tx_out_t* dap_chain_datum_tx_item_out_create(const dap_chain_addr_t *a_addr, uint64_t a_value);
+
+/**
+ * Create item dap_chain_tx_out_cond_t
+ *
+ * return item, NULL Error
+ */
+dap_chain_tx_out_cond_t* dap_chain_datum_tx_item_out_cond_create_srv_pay(dap_enc_key_t *a_key, dap_chain_net_srv_uid_t a_srv_uid,
+        uint64_t a_value, uint64_t a_value_max_per_unit, dap_chain_net_srv_price_unit_uid_t a_unit,
+                                                                 const void *a_cond, size_t a_cond_size);
+
+/**
+ * Create item dap_chain_tx_sig_t
+ *
+ * return item, NULL Error
+ */
+dap_chain_tx_sig_t* dap_chain_datum_tx_item_sign_create(dap_enc_key_t *a_key, const void *a_data, size_t a_data_size);
+
+/**
+ * Get sign from sign item
+ *
+ * return sign, NULL Error
+ */
+dap_sign_t* dap_chain_datum_tx_item_sign_get_sig(dap_chain_tx_sig_t *a_tx_sig);
+
+/**
+ * Get item from transaction
+ *
+ * a_tx [in] transaction
+ * a_item_idx_start[in/out] start index / found index of item in transaction, if 0 then from beginning
+ * a_type[in] type of item being find, if TX_ITEM_TYPE_ANY - any item
+ * a_item_out_size size[out] size of returned item
+ * return item data, NULL Error index or bad format transaction
+ */
+uint8_t* dap_chain_datum_tx_item_get( dap_chain_datum_tx_t *a_tx, int *a_item_idx_start,
+        dap_chain_tx_item_type_t a_type, int *a_item_out_size);
+
+// Get all item from transaction by type
+dap_list_t* dap_chain_datum_tx_items_get(dap_chain_datum_tx_t *a_tx, dap_chain_tx_item_type_t a_type, int *a_item_count);

libdap-chain-common/include/dap_chain_datum_tx_out.h

+/*
+ * 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 <stdint.h>
+#include "dap_common.h"
+#include "dap_chain_common.h"
+#include "dap_chain_datum_tx.h"
+
+/**
+  * @struct dap_chain_tx_out
+  * @brief Transaction item outout
+  */
+typedef struct dap_chain_tx_out{
+    struct {
+        dap_chain_tx_item_type_t type:8; ///           @param    type            @brief  Transaction item type
+        uint64_t value; ///                       @param    value           @brief  Number of Datoshis ( DAP/10^9 ) to be transfered
+    } header; /// Only header's hash is used for verification
+    dap_chain_addr_t addr; ////
+} DAP_ALIGN_PACKED dap_chain_tx_out_t;

libdap-chain-common/include/dap_chain_datum_tx_out_cond.h

+/*
+ * Authors:
+ * Dmitriy A. Gearasimov <gerasimov.dmitriy@demlabs.net>
+ * Alexander Lysikov <alexander.lysikov@demlabs.net>
+ * DeM Labs Inc.   https://demlabs.net
+ * DeM Labs Open source community https://github.com/demlabsinc
+ * Copyright  (c) 2017-2019
+ * 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 <stdint.h>
+#include "dap_common.h"
+#include "dap_chain_common.h"
+#include "dap_chain_datum_tx.h"
+
+
+#define DAP_CHAIN_TX_OUT_COND_SUBTYPE_SRV_PAY     0x01
+/**
+ * @struct dap_chain_tx_out
+ * @brief Transaction item out_cond
+ */
+typedef struct dap_chain_tx_out_cond {
+    struct {
+        /// Transaction item type
+        dap_chain_tx_item_type_t item_type :8;
+        /// Condition subtype
+        uint8_t subtype;
+        /// Number of Datoshis ( DAP/10^9 ) to be reserver for service
+        uint64_t value;
+        /// When time expires this output could be used only by transaction owner
+        dap_chain_time_t ts_expires;
+    } header;
+    union {
+        struct {
+            /// Structure with specific for service pay condition subtype
+            struct {
+                /// Public key hash that could use this conditioned outout
+                dap_chain_hash_fast_t pkey_hash;
+                /// Service uid that only could be used for this outout
+                dap_chain_net_srv_uid_t srv_uid;
+                /// Price unit thats used to check price max
+                dap_chain_net_srv_price_unit_uid_t unit;
+                /// Maximum price per unit
+                uint64_t unit_price_max_datoshi;
+                 /// Condition parameters size
+                uint32_t params_size;
+            } DAP_ALIGN_PACKED header;
+            uint8_t params[]; // condition parameters, pkey, hash or smth like this
+        } DAP_ALIGN_PACKED srv_pay;
+    } subtype;
+}DAP_ALIGN_PACKED dap_chain_tx_out_cond_t;
+
+uint8_t* dap_chain_datum_tx_out_cond_item_get_params(dap_chain_tx_out_cond_t *a_tx_out_cond, size_t *a_params_size_out);
+
+

libdap-chain-common/include/dap_chain_datum_tx_pkey.h

+/*
+ * 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 <stdint.h>
+#include "dap_common.h"
+#include "dap_chain_common.h"
+#include "dap_chain_datum_tx.h"
+/**
+  * @struct dap_chain_tx_pkey
+  * @brief TX item with one of the transaction's public keys
+  */
+typedef struct dap_chain_tx_pkey{
+    struct {
+        dap_chain_tx_item_type_t type:8; /// @param    type            @brief Transaction item type
+        dap_sign_type_t sig_type; /// Signature type
+        uint32_t sig_size; /// Signature size
+    } header; /// Only header's hash is used for verification
+    uint32_t seq_no; /// Sequence number, out of the header so could be changed during reorganization
+    uint8_t pkey[]; /// @param sig @brief raw pkey dat
+} DAP_ALIGN_PACKED dap_chain_tx_pkey_t;

libdap-chain-common/include/dap_chain_datum_tx_receipt.h

+/*
+ * Authors:
+ * Dmitriy A. Gearasimov <gerasimov.dmitriy@demlabs.net>
+ * DeM Labs Inc.   https://demlabs.net
+ * CellFrame       https://cellframe.net
+ * Sources         https://gitlab.demlabs.net/cellframe
+ * Copyright  (c) 2017-2019
+ * All rights reserved.
+
+ This file is part of CellFrame SDK the open source project
+
+    CellFrame SDK 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.
+
+    CellFrame SDK 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 CellFrame SDK based project.  If not, see <http://www.gnu.org/licenses/>.
+*/
+#pragma once
+
+#include <stdint.h>
+#include "dap_chain_common.h"
+
+/**
+ * @struct dap_chain_tx_out
+ * @brief Transaction item out_cond
+ */
+typedef struct dap_chain_datum_tx_receipt {
+    uint8_t type; //dap_chain_tx_item_type_t type :8; // Transaction item type
+    dap_chain_receipt_info_t receipt_info; // Receipt itself
+    uint16_t size;
+    uint16_t exts_size;
+    byte_t exts_n_signs[]; // Signatures, first from provider, second from client
+}DAP_ALIGN_PACKED dap_chain_datum_tx_receipt_t;
+
+
+#ifdef __cplusplus
+extern "C" {
+#endif
+
+static inline size_t dap_chain_datum_tx_receipt_get_size_hdr(){ return 1+sizeof (dap_chain_receipt_info_t)+sizeof (uint16_t) +sizeof (uint16_t); }
+
+dap_chain_datum_tx_receipt_t * dap_chain_datum_tx_receipt_create( dap_chain_net_srv_uid_t srv_uid,
+                                                                  dap_chain_net_srv_price_unit_uid_t units_type,
+                                                                    uint64_t units, uint64_t value_datoshi, const void * a_ext, size_t a_ext_size);
+size_t dap_chain_datum_tx_receipt_sign_add(dap_chain_datum_tx_receipt_t ** a_receipt, size_t a_receipt_size, dap_enc_key_t *a_key );
+dap_sign_t* dap_chain_datum_tx_receipt_sign_get(dap_chain_datum_tx_receipt_t * l_receipt, size_t l_receipt_size , uint16_t sign_position);
+uint16_t dap_chain_datum_tx_receipt_signs_count(dap_chain_datum_tx_receipt_t * l_receipt, size_t l_receipt_size);
+static inline uint16_t dap_chain_datum_tx_receipt_get_size(const dap_chain_datum_tx_receipt_t * l_receipt)
+{
+    return l_receipt->size;
+}
+
+
+#ifdef __cplusplus
+}
+#endif

libdap-chain-common/include/dap_chain_datum_tx_sig.h

+/*
+ * 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 <stdint.h>
+#include "dap_common.h"
+#include "dap_chain_common.h"
+#include "dap_chain_datum_tx.h"
+
+
+/**
+  * @struct dap_chain_tx_sig
+  * @brief Section with set of transaction signatures
+  */
+typedef struct dap_chain_tx_sig{
+    struct {
+        dap_chain_tx_item_type_t type:8; /// @param    type            @brief Transaction item type
+//        dap_sign_type_t sig_type; /// Signature type
+        uint32_t sig_size; /// Signature size
+    } header; /// Only header's hash is used for verification
+    uint8_t sig[]; /// @param sig @brief raw signature data
+} DAP_ALIGN_PACKED dap_chain_tx_sig_t;

libdap-chain-common/include/dap_chain_datum_tx_token.h

+/*
+ * Authors:
+ * Dmitriy A. Gearasimov <kahovski@gmail.com>
+ * DeM Labs Inc.   https://demlabs.net
+ * DeM Labs Open source community https://github.com/demlabsinc
+ * Copyright  (c) 2017-2019
+ * 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 <stdint.h>
+#include "dap_common.h"
+#include "dap_chain_common.h"
+#include "dap_chain_datum_tx.h"
+
+/**
+  * @struct dap_chain_tx_token
+  * @brief Token item
+  */
+typedef struct dap_chain_tx_token{
+    struct {
+        dap_chain_tx_item_type_t type:8;
+        char ticker[DAP_CHAIN_TICKER_SIZE_MAX];
+        uint8_t padding; // Padding
+        dap_chain_id_t token_emission_chain_id;
+        dap_chain_hash_fast_t token_emission_hash;
+    } header; /// Only header's hash is used for verification
+} DAP_ALIGN_PACKED dap_chain_tx_token_t;
+
+
+/**
+  * @struct dap_chain_tx_token_ext
+  * @brief External token swap
+  */
+typedef struct dap_chain_tx_token_ext{
+    struct {
+        dap_chain_tx_item_type_t type:8;
+        uint8_t version;
+        char ticker[DAP_CHAIN_TICKER_SIZE_MAX];
+        uint8_t padding1; // Padding
+        dap_chain_net_id_t ext_net_id;
+        dap_chain_id_t ext_chain_id;
+        dap_chain_hash_fast_t ext_tx_hash;
+        uint16_t padding2;
+        uint16_t ext_tx_out_idx; // Output index
+    } header; /// Only header's hash is used for verification
+} DAP_ALIGN_PACKED dap_chain_tx_token_ext_t;

libdap-chain-common/libdap-chain-common.pri

+HEADERS +=  $$PWD/include/dap_chain_common.h                 \
+	    $$PWD/include/dap_chain_datum.h                  \
+	    $$PWD/include/dap_chain_datum_hashtree_roots.h   \ 
+	    $$PWD/include/dap_chain_datum_token.h            \
+	    $$PWD/include/dap_chain_datum_tx.h               \ 
+	    $$PWD/include/dap_chain_datum_tx_in_cond.h       \
+	    $$PWD/include/dap_chain_datum_tx_in.h            \
+	    $$PWD/include/dap_chain_datum_tx_items.h         \
+	    $$PWD/include/dap_chain_datum_tx_out_cond.h      \
+	    $$PWD/include/dap_chain_datum_tx_out.h           \
+	    $$PWD/include/dap_chain_datum_tx_pkey.h          \
+	    $$PWD/include/dap_chain_datum_tx_receipt.h       \
+	    $$PWD/include/dap_chain_datum_tx_sig.h           \
+	    $$PWD/include/dap_chain_datum_tx_token.h 
+
+SOURCES +=  $$PWD/src/dap_chain_common.c                     \
+	    $$PWD/src/dap_chain_datum.c                      \
+	    $$PWD/src/dap_chain_datum_hashtree_roots.c       \
+	    $$PWD/src/dap_chain_datum_token.c                \
+	    $$PWD/src/dap_chain_datum_tx.c                   \
+	    $$PWD/src/dap_chain_datum_tx_items.c             \
+	    $$PWD/src/dap_chain_datum_tx_out_cond.c          \
+	    $$PWD/src/dap_chain_datum_tx_receipt.c           \
+	    $$PWD/src/dap_chain_datum_tx_token.c 
+
+INCLUDEPATH += $$PWD/include 

libdap-chain-common/src/dap_chain_common.c

+/*
+ * Authors:
+ * Dmitriy A. Gearasimov <gerasimov.dmitriy@demlabs.net>
+ * DeM Labs Inc.   https://demlabs.net
+ * Kelvin Project https://github.com/kelvinblockchain
+ * 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 <string.h>
+#include "dap_common.h"
+#include "dap_sign.h"
+#include "dap_chain_common.h"
+#include "dap_enc_base58.h"
+#include "dap_hash.h"
+#include "dap_strfuncs.h"
+
+#define LOG_TAG "dap_chain_common"
+
+/**
+ * @brief dap_chain_hash_to_str
+ * @param a_hash
+ * @param a_str
+ * @param a_str_max
+ * @return
+ */
+size_t dap_chain_hash_slow_to_str( dap_chain_hash_slow_t *a_hash, char *a_str, size_t a_str_max )
+{
+    const size_t c_hash_str_size = sizeof(*a_hash) * 2 + 1 /*trailing zero*/+ 2 /* heading 0x */;
+
+    if(a_str_max < c_hash_str_size) {
+        log_it(L_ERROR, "String for hash too small, need %u but have only %u", c_hash_str_size, a_str_max);
+    }
+    size_t i;
+    dap_snprintf(a_str, 3, "0x");
+
+    for(i = 0; i < sizeof(a_hash->raw); ++i)
+        dap_snprintf( a_str + i * 2 + 2, 3, "%02x", a_hash->raw[i] );
+
+    a_str[c_hash_str_size] = '\0';
+
+    return strlen(a_str);
+}
+
+/**
+ * @brief dap_chain_hash_fast_to_str
+ * @param a_hash
+ * @param a_str
+ * @param a_str_max
+ * @return
+ */
+#if 0
+size_t dap_chain_hash_fast_to_str( dap_chain_hash_fast_t *a_hash, char *a_str, size_t a_str_max )
+{
+    const size_t c_hash_str_size = sizeof(*a_hash) * 2 + 1 /*trailing zero*/+ 2 /* heading 0x */;
+
+    if ( a_str_max < c_hash_str_size ) {
+      log_it( L_ERROR, "String for hash too small, need %u but have only %u", c_hash_str_size, a_str_max );
+    }
+
+//    size_t i;
+    // faster conversion to string
+
+    dap_snprintf( a_str, 3, "0x" );
+
+    size_t l_ret = dap_bin2hex(a_str + 2, a_hash->raw, sizeof(a_hash->raw));
+
+    //for(i = 0; i < sizeof(a_hash->raw); ++i)
+    //    dap_snprintf(a_str + i * 2 + 2, 3, "%02x", (a_hash->raw[i]));
+
+    a_str[c_hash_str_size - 1] = '\0';
+
+    if(!l_ret)
+        return 0;
+
+    return c_hash_str_size - 1; //strlen(a_str);
+}
+#endif
+
+
+
+/**
+ * @brief dap_chain_addr_to_str
+ * @param a_addr
+ * @return
+ */
+char* dap_chain_addr_to_str(const dap_chain_addr_t *a_addr)
+{
+    if ( a_addr ==NULL)
+        return  NULL;
+
+    size_t l_ret_size = DAP_ENC_BASE58_ENCODE_SIZE(sizeof(dap_chain_addr_t));
+    char * l_ret = DAP_NEW_SIZE(char, l_ret_size);
+    if(dap_enc_base58_encode(a_addr, sizeof(dap_chain_addr_t), l_ret) > 0)
+        return l_ret;
+    else {
+        DAP_DELETE(l_ret);
+        return NULL;
+    }
+}
+
+/**
+ * @brief dap_chain_str_to_addr
+ * @param a_addr
+ * @return
+ */
+dap_chain_addr_t* dap_chain_addr_from_str(const char *a_str)
+{
+    size_t l_str_len = (a_str) ? strlen(a_str) : 0;
+    if(l_str_len <= 0)
+        return NULL;
+    size_t l_ret_size = DAP_ENC_BASE58_DECODE_SIZE(l_str_len);
+    dap_chain_addr_t * l_addr = DAP_NEW_Z_SIZE(dap_chain_addr_t, l_ret_size);
+    if(dap_enc_base58_decode(a_str, l_addr) == sizeof(dap_chain_addr_t) &&
+            dap_chain_addr_check_sum(l_addr)==1)
+        return l_addr;
+    else
+        DAP_DELETE(l_addr);
+    return NULL;
+}
+
+/**
+ * @brief dap_chain_net_id_from_str
+ * @param a_net_str
+ * @return
+ */
+dap_chain_net_id_t dap_chain_net_id_from_str(const char * a_net_str)
+{
+    dap_chain_net_id_t l_ret={ 0 };
+    log_it(L_DEBUG, "net id: %s", a_net_str);
+
+    a_net_str += 2;
+    /*size_t l_net_str_len = strlen( a_net_str);
+    if (l_net_str_len >2){
+        a_net_str+=2;
+        l_net_str_len-=2;
+        if (l_net_str_len == sizeof (l_ret)/2 ){
+            size_t l_pos =0;
+            char l_byte[3];
+            while(l_net_str_len){
+                // Copy two characters for bytes
+                memcpy(l_byte,a_net_str,2);
+                l_byte[2]='\0';
+                // Read byte chars
+                if ( sscanf(l_byte,"%02hhx",&l_ret.raw[l_pos] ) != 1)
+                    if( sscanf(l_byte,"%02hhX",&l_ret.raw[l_pos] ) ==1 )
+                        break;
+
+                // Update pos
+                l_pos++;
+                // Reduce in two steps to not to break if input will have bad input
+                l_net_str_len-=1;
+                if(l_net_str_len)
+                    l_net_str_len-=1;
+            }
+        }else
+            log_it(L_WARNING,"Wrong input string \"%s\" not recognized as network id", a_net_str);
+    } */
+
+    if (!(l_ret.uint64 = strtol(a_net_str, NULL, 0))) {
+        log_it(L_ERROR, "Wrong input string \"%s\" not recognized as network id", a_net_str);
+        return l_ret;
+    }
+    //dap_stpcpy(&l_ret.raw, a_net_str);
+    return l_ret;
+}
+
+/**
+ * @brief dap_chain_net_srv_uid_from_str
+ * @param a_net_str
+ * @return
+ */
+dap_chain_net_srv_uid_t dap_chain_net_srv_uid_from_str( const char * a_net_srv_uid_str)
+{
+    dap_chain_net_srv_uid_t l_ret={{0}};
+    size_t l_net_srv_uid_str_len = strlen( a_net_srv_uid_str);
+    if (l_net_srv_uid_str_len >2){
+        a_net_srv_uid_str+=2;
+        l_net_srv_uid_str_len-=2;
+        if (l_net_srv_uid_str_len == sizeof (l_ret)/2 ){
+            size_t l_pos =0;
+            char l_byte[3];
+            while(l_net_srv_uid_str_len){
+
+                // Copy two characters for bytes
+                memcpy(l_byte,a_net_srv_uid_str,2);
+                l_byte[2]='\0';
+
+                // Read byte chars
+                if ( sscanf(l_byte,"%02hhx",&l_ret.raw[l_pos] ) != 1)
+                    if( sscanf(l_byte,"%02hhX",&l_ret.raw[l_pos] ) ==1 )
+                        break;
+
+                // Update pos
+                l_pos++;
+                // Reduce in two steps to not to break if input will have bad input
+                l_net_srv_uid_str_len-=1;
+                if(l_net_srv_uid_str_len)
+                    l_net_srv_uid_str_len-=1;
+            }
+        }else
+            log_it(L_WARNING,"Wrong input string \"%s\" not recognized as network id", a_net_srv_uid_str);
+    }
+    return  l_ret;
+}
+
+
+
+/**
+ * @brief dap_chain_addr_fill
+ * @param a_addr
+ * @param a_key
+ * @param a_net_id
+ * @return
+ */
+void dap_chain_addr_fill(dap_chain_addr_t *a_addr, dap_enc_key_t *a_key, dap_chain_net_id_t *a_net_id)
+{
+    if(!a_addr || !a_key || !a_net_id)
+        return;
+    a_addr->addr_ver = DAP_CHAIN_ADDR_VERSION_CURRENT;
+    a_addr->net_id.uint64 = a_net_id->uint64;
+    a_addr->sig_type.raw = dap_sign_type_from_key_type(a_key->type).raw;
+    // key -> serialized key
+    dap_chain_hash_fast_t l_hash_public_key;
+    size_t l_pub_key_data_size;
+    uint8_t *l_pub_key_data = dap_enc_key_serealize_pub_key(a_key, &l_pub_key_data_size);
+    if ( l_pub_key_data == NULL ){
+        log_it(L_ERROR,"Can't fill address from key, its empty");
+        return;
+    }
+
+    // serialized key -> key hash
+
+    if(dap_hash_fast(l_pub_key_data, l_pub_key_data_size, &l_hash_public_key))
+        memcpy(a_addr->data.hash, l_hash_public_key.raw, sizeof(l_hash_public_key.raw));
+    DAP_DELETE(l_pub_key_data);
+    // calc checksum
+    dap_hash_fast(a_addr, sizeof(dap_chain_addr_t) - sizeof(dap_chain_hash_fast_t), &a_addr->checksum);
+}
+
+/**
+ * @brief dap_chain_addr_check_sum
+ * @param a_addr
+ * @return 1 Ok, -1 Invalid a_addr or checksum
+ */
+int dap_chain_addr_check_sum(const dap_chain_addr_t *a_addr)
+{
+    if(!a_addr)
+        return -1;
+    dap_chain_hash_fast_t l_checksum;
+    // calc checksum
+    dap_hash_fast(a_addr, sizeof(dap_chain_addr_t) - sizeof(dap_chain_hash_fast_t), &l_checksum);
+    if(!memcmp(a_addr->checksum.raw, l_checksum.raw, sizeof(l_checksum.raw)))
+        return 1;
+    return -1;
+}

libdap-chain-common/src/dap_chain_datum.c

+/*
+ * Authors:
+ * Dmitriy A. Gearasimov <gerasimov.dmitriy@demlabs.net>
+ * DeM Labs Inc.   https://demlabs.net
+ * Kelvin Project https://github.com/kelvinblockchain
+ * 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 <string.h>
+
+#include "dap_common.h"
+#include "dap_chain_datum.h"
+#include "dap_chain_datum_tx.h"
+#include "dap_chain_datum_hashtree_roots.h"
+#include "dap_chain_datum_token.h"
+
+#define LOG_TAG "dap_chain_datum"
+
+const char * c_datum_type_str[]={
+    [DAP_CHAIN_DATUM_TX]="DATUM_TX",
+    [DAP_CHAIN_DATUM_TX_REQUEST]="DATUM_TX_REQUEST",
+    [DAP_CHAIN_DATUM_WASM_CODE]="DATUM_WASM_CODE",
+    [DAP_CHAIN_DATUM_WASM_DATA]="DATUM_WASM_DATA",
+    [DAP_CHAIN_DATUM_EVM_CODE]="DATUM_EVM_CODE",
+    [DAP_CHAIN_DATUM_EVM_DATA]="DATUM_EVM_DATA",
+    [DAP_CHAIN_DATUM_CA]="DATUM_CA",
+    [DAP_CHAIN_DATUM_CUSTOM]="DATUM_CUSTOM",
+    [DAP_CHAIN_DATUM_TOKEN_DECL]="DATUM_TOKEN_DECL",
+    [DAP_CHAIN_DATUM_TOKEN_EMISSION]="DATUM_TOKEN_EMISSION",
+};
+
+/**
+ * @brief dap_chain_datum_create
+ * @param a_type_id
+ * @param a_data
+ * @param a_data_size
+ * @return
+ */
+dap_chain_datum_t * dap_chain_datum_create(uint16_t a_type_id, const void * a_data, size_t a_data_size)
+{
+   dap_chain_datum_t * l_datum = DAP_NEW_Z_SIZE(dap_chain_datum_t, sizeof(l_datum->header)+ a_data_size);
+   memcpy (l_datum->data,a_data,a_data_size);
+   l_datum->header.type_id = a_type_id;
+   l_datum->header.data_size = (uint32_t) a_data_size;
+   l_datum->header.version_id = DAP_CHAIN_DATUM_VERSION;
+   l_datum->header.ts_create =(uint64_t) time(NULL);
+   return  l_datum;
+}
+

libdap-chain-common/src/dap_chain_datum_hashtree_roots.c

+/*
+ * 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_datum_hashtree_roots.h"
+
+#define LOG_TAG "dap_chain_datum_hashtree_roots"

libdap-chain-common/src/dap_chain_datum_token.c

+/*
+ * 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 <stdio.h>
+#include <string.h>
+#include "dap_chain_datum_token.h"
+
+const char *c_dap_chain_datum_token_emission_type_str[]={
+    [DAP_CHAIN_DATUM_TOKEN_EMISSION_TYPE_UNDEFINED] = "DAP_CHAIN_DATUM_TOKEN_EMISSION_TYPE_UNDEFINED",
+    [DAP_CHAIN_DATUM_TOKEN_EMISSION_TYPE_AUTH] = "DAP_CHAIN_DATUM_TOKEN_EMISSION_TYPE_AUTH",
+    [DAP_CHAIN_DATUM_TOKEN_EMISSION_TYPE_ALGO] = "DAP_CHAIN_DATUM_TOKEN_EMISSION_TYPE_ALGO",
+    [DAP_CHAIN_DATUM_TOKEN_EMISSION_TYPE_ATOM_OWNER] = "DAP_CHAIN_DATUM_TOKEN_EMISSION_TYPE_ATOM_OWNER",
+    [DAP_CHAIN_DATUM_TOKEN_EMISSION_TYPE_SMART_CONTRACT] = "DAP_CHAIN_DATUM_TOKEN_EMISSION_TYPE_SMART_CONTRACT",
+};

libdap-chain-common/src/dap_chain_datum_tx.c

+/*
+ * 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 <memory.h>
+#include <assert.h>
+#include "dap_common.h"
+#include "dap_sign.h"
+#include "dap_chain_datum_tx_items.h"
+#include "dap_chain_datum_tx.h"
+
+#define LOG_TAG "dap_chain_datum_tx"
+
+/**
+ * Create empty transaction
+ *
+ * return transaction, 0 Error
+ */
+dap_chain_datum_tx_t* dap_chain_datum_tx_create(void)
+{
+    dap_chain_datum_tx_t *tx = DAP_NEW_Z(dap_chain_datum_tx_t);
+    tx->header.ts_created = time(NULL);
+    return tx;
+}
+
+/**
+ * Delete transaction
+ */
+void dap_chain_datum_tx_delete(dap_chain_datum_tx_t *a_tx)
+{
+    if(a_tx)
+        DAP_DELETE(a_tx);
+}
+
+/**
+ * Get size of transaction
+ *
+ * return size, 0 Error
+ */
+size_t dap_chain_datum_tx_get_size(dap_chain_datum_tx_t *a_tx)
+{
+    if(!a_tx)
+        return 0;
+    return (sizeof(dap_chain_datum_tx_t) + a_tx->header.tx_items_size);
+}
+
+/**
+ * Insert item to transaction
+ *
+ * return 1 Ok, -1 Error
+ */
+int dap_chain_datum_tx_add_item(dap_chain_datum_tx_t **a_tx, const uint8_t *a_item)
+{
+    size_t size = dap_chain_datum_item_tx_get_size(a_item);
+    if(!size)
+        return -1;
+    dap_chain_datum_tx_t *tx_cur = *a_tx;
+    tx_cur = (dap_chain_datum_tx_t*) realloc(tx_cur, dap_chain_datum_tx_get_size(tx_cur) + size);
+    memcpy((uint8_t*) tx_cur->tx_items + tx_cur->header.tx_items_size, a_item, size);
+    tx_cur->header.tx_items_size += size;
+    *a_tx = tx_cur;
+    return 1;
+}
+
+/**
+ * Create 'in' item and insert to transaction
+ *
+ * return 1 Ok, -1 Error
+ */
+int dap_chain_datum_tx_add_in_item(dap_chain_datum_tx_t **a_tx, dap_chain_hash_fast_t *a_tx_prev_hash,
+        uint32_t a_tx_out_prev_idx)
+{
+    dap_chain_tx_in_t *l_tx_in = dap_chain_datum_tx_item_in_create(a_tx_prev_hash, a_tx_out_prev_idx);
+    if(l_tx_in) {
+        dap_chain_datum_tx_add_item(a_tx, (const uint8_t *)l_tx_in);
+        DAP_DELETE(l_tx_in);
+        return 1;
+    }
+    return -1;
+}
+
+
+/**
+ * @brief dap_chain_datum_tx_add_in_cond_item
+ * @param a_tx
+ * @param a_pkey_serialized
+ * @param a_pkey_serialized_size
+ * @param a_receipt_idx
+ * @return
+ */
+int dap_chain_datum_tx_add_in_cond_item(dap_chain_datum_tx_t **a_tx, dap_chain_hash_fast_t *a_tx_prev_hash,
+                                        uint32_t a_tx_out_prev_idx,
+                                        uint32_t a_receipt_idx)
+{
+    dap_chain_tx_in_cond_t *l_tx_in_cond = dap_chain_datum_tx_item_in_cond_create( a_tx_prev_hash, a_tx_out_prev_idx,
+                a_receipt_idx);
+    if(l_tx_in_cond) {
+        dap_chain_datum_tx_add_item(a_tx, (uint8_t *)l_tx_in_cond);
+        DAP_DELETE(l_tx_in_cond);
+        return 0;
+    }
+    return -1;
+
+}
+/**
+ * Create 'out' item and insert to transaction
+ *
+ * return 1 Ok, -1 Error
+ */
+int dap_chain_datum_tx_add_out_item(dap_chain_datum_tx_t **a_tx, const dap_chain_addr_t *a_addr, uint64_t a_value)
+{
+    dap_chain_tx_out_t *l_tx_out = dap_chain_datum_tx_item_out_create(a_addr, a_value);
+    if(l_tx_out) {
+        dap_chain_datum_tx_add_item(a_tx, (const uint8_t *)l_tx_out);
+        DAP_DELETE(l_tx_out);
+        return 1;
+    }
+    return -1;
+}
+
+/**
+ * Create 'out_cond' item and insert to transaction
+ *
+ * return 1 Ok, -1 Error
+ */
+int dap_chain_datum_tx_add_out_cond_item(dap_chain_datum_tx_t **a_tx, dap_enc_key_t *a_key, dap_chain_net_srv_uid_t a_srv_uid,
+        uint64_t a_value, uint64_t a_value_max_per_unit, dap_chain_net_srv_price_unit_uid_t a_unit, const void *a_cond, size_t a_cond_size)
+{
+    dap_chain_tx_out_cond_t *l_tx_out = dap_chain_datum_tx_item_out_cond_create_srv_pay(
+                a_key, a_srv_uid,a_value, a_value_max_per_unit, a_unit, a_cond, a_cond_size );
+    if(l_tx_out) {
+        dap_chain_datum_tx_add_item(a_tx, (const uint8_t *) l_tx_out);
+        DAP_DELETE(l_tx_out);
+        return 1;
+    }
+    return -1;
+}
+
+/**
+ * Sign a transaction (Add sign item to transaction)
+ *
+ * return 1 Ok, -1 Error
+ */
+int dap_chain_datum_tx_add_sign_item(dap_chain_datum_tx_t **a_tx, dap_enc_key_t *a_key)
+{
+    if(!a_tx || !a_key)
+        return -1;
+    // sign all previous items in transaction
+    const void *l_data = (*a_tx)->tx_items;
+    const size_t l_data_size = (*a_tx)->header.tx_items_size;
+    dap_chain_tx_sig_t *l_tx_sig = dap_chain_datum_tx_item_sign_create(a_key, l_data, l_data_size);
+    if(l_tx_sig) {
+        int l_ret = dap_chain_datum_tx_add_item(a_tx, (const uint8_t*) l_tx_sig);
+        DAP_DELETE(l_tx_sig);
+        return l_ret;
+    }
+    return -1;
+}
+
+/**
+ * Verify all sign item in transaction
+ *
+ * return 1 Ok, 0 Invalid signature, -1 Not found signature or other Error
+ */
+int dap_chain_datum_tx_verify_sign(dap_chain_datum_tx_t *tx)
+{
+    int ret = -1;
+    if(!tx)
+        return -2;
+    uint32_t tx_items_pos = 0, tx_items_size = tx->header.tx_items_size;
+    while(tx_items_pos < tx_items_size) {
+        uint8_t *item = tx->tx_items + tx_items_pos;
+        size_t l_item_tx_size = dap_chain_datum_item_tx_get_size(item);
+        if(!l_item_tx_size)
+            return -3;
+        if(dap_chain_datum_tx_item_get_type(item) == TX_ITEM_TYPE_SIG) {
+            dap_chain_tx_sig_t *l_item_tx_sig = (dap_chain_tx_sig_t*) item;
+            dap_sign_t *l_sign = (dap_sign_t*) l_item_tx_sig->sig;
+            if ( ( l_sign->header.sign_size + l_sign->header.sign_pkey_size +sizeof (l_sign->header) )
+                  > l_item_tx_size ){
+                log_it(L_WARNING,"Incorrect signature's header, possible corrupted data");
+                return -4;
+            }
+            if(dap_sign_verify(l_sign, tx->tx_items, tx_items_pos) != 1) {
+                // invalid signature
+                ret = 0;
+                tx_items_pos += l_item_tx_size;
+                break;
+            }
+            // signature verify successfully
+            ret = 1;
+        }
+        // sign item or items must be at the end, therefore ret will be changed later anyway
+        else
+            ret = -4;
+        // go to text item
+        tx_items_pos += l_item_tx_size;
+    }
+    assert(tx_items_pos == tx_items_size);
+    return ret;
+}
+

libdap-chain-common/src/dap_chain_datum_tx_items.c

+/*
+ * 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 <stdint.h>
+#include <string.h>
+
+#include "dap_common.h"
+#include "dap_enc_key.h"
+#include "dap_chain_common.h"
+#include "dap_sign.h"
+#include "dap_hash.h"
+#include "dap_chain_datum_tx.h"
+#include "dap_chain_datum_tx_in.h"
+#include "dap_chain_datum_tx_out.h"
+#include "dap_chain_datum_tx_in_cond.h"
+#include "dap_chain_datum_tx_out_cond.h"
+#include "dap_chain_datum_tx_items.h"
+
+static size_t dap_chain_tx_in_get_size(const dap_chain_tx_in_t *a_item)
+{
+    (void) a_item;
+    size_t size = sizeof(dap_chain_tx_in_t); // + item->header.sig_size;
+    return size;
+}
+
+static size_t dap_chain_tx_in_cond_get_size(const dap_chain_tx_in_cond_t *a_item)
+{
+    size_t size = sizeof(dap_chain_tx_in_cond_t);
+    return size;
+}
+
+static size_t dap_chain_tx_out_get_size(const dap_chain_tx_out_t *a_item)
+{
+    (void) a_item;
+    size_t size = sizeof(dap_chain_tx_out_t);
+    return size;
+}
+
+static size_t dap_chain_tx_out_cond_get_size(const dap_chain_tx_out_cond_t *a_item)
+{
+    switch (a_item->header.subtype) {
+        case DAP_CHAIN_TX_OUT_COND_SUBTYPE_SRV_PAY:
+            return sizeof (a_item->header) + sizeof (a_item->subtype.srv_pay.header) + a_item->subtype.srv_pay.header.params_size;
+        default:
+                return 0;
+    }
+}
+
+static size_t dap_chain_tx_pkey_get_size(const dap_chain_tx_pkey_t *a_item)
+{
+    size_t size = sizeof(dap_chain_tx_pkey_t) + a_item->header.sig_size;
+    return size;
+}
+
+static size_t dap_chain_tx_sig_get_size(const dap_chain_tx_sig_t *item)
+{
+    size_t size = sizeof(dap_chain_tx_sig_t) + item->header.sig_size;
+    return size;
+}
+
+static size_t dap_chain_tx_token_get_size(const dap_chain_tx_token_t *a_item)
+{
+    (void) a_item;
+    size_t size = sizeof(dap_chain_tx_token_t);
+    return size;
+}
+
+/**
+ * Get item type
+ *
+ * return type, or TX_ITEM_TYPE_ANY if error
+ */
+dap_chain_tx_item_type_t dap_chain_datum_tx_item_get_type(const uint8_t *a_item)
+{
+    const dap_chain_tx_in_t *l_item_tx_in = (const dap_chain_tx_in_t*) a_item;
+    dap_chain_tx_item_type_t type = (l_item_tx_in) ? l_item_tx_in->header.type : TX_ITEM_TYPE_ANY;
+    return type;
+}
+
+/**
+ * Get item size
+ *
+ * return size, 0 Error
+ */
+size_t dap_chain_datum_item_tx_get_size(const uint8_t *a_item)
+{
+    dap_chain_tx_item_type_t type = dap_chain_datum_tx_item_get_type(a_item);
+    size_t size = 0;
+    switch (type) {
+    case TX_ITEM_TYPE_IN: // Transaction inputs
+        size = dap_chain_tx_in_get_size((const dap_chain_tx_in_t*) a_item);
+        break;
+    case TX_ITEM_TYPE_OUT: // Transaction outputs
+        size = dap_chain_tx_out_get_size((const dap_chain_tx_out_t*) a_item);
+        break;
+    case TX_ITEM_TYPE_RECEIPT: // Receipt
+        size = dap_chain_datum_tx_receipt_get_size((const dap_chain_datum_tx_receipt_t*) a_item);
+    case TX_ITEM_TYPE_IN_COND: // Transaction inputs with condition
+        size = dap_chain_tx_in_cond_get_size((const dap_chain_tx_in_cond_t*) a_item);
+        break;
+    case TX_ITEM_TYPE_OUT_COND: // Transaction output with condition
+        size = dap_chain_tx_out_cond_get_size((const dap_chain_tx_out_cond_t*) a_item);
+        break;
+    case TX_ITEM_TYPE_PKEY: // Transaction public keys
+        size = dap_chain_tx_pkey_get_size((const dap_chain_tx_pkey_t*) a_item);
+        break;
+    case TX_ITEM_TYPE_SIG: // Transaction signatures
+        size = dap_chain_tx_sig_get_size((const dap_chain_tx_sig_t*) a_item);
+        break;
+    case TX_ITEM_TYPE_TOKEN: // token item
+        size = dap_chain_tx_token_get_size((const dap_chain_tx_token_t*) a_item);
+        break;
+    default:
+        return 0;
+    }
+    return size;
+}
+
+/**
+ * Create item dap_chain_tx_token_t
+ *
+ * return item, NULL Error
+ */
+dap_chain_tx_token_t* dap_chain_datum_tx_item_token_create(dap_chain_hash_fast_t * a_datum_token_hash,const char * a_ticker)
+{
+    if(!a_ticker)
+        return NULL;
+    size_t a_ticker_len = strlen(a_ticker);
+    dap_chain_tx_token_t *l_item = DAP_NEW_Z(dap_chain_tx_token_t);
+    l_item->header.type = TX_ITEM_TYPE_TOKEN;
+    memcpy (& l_item->header.token_emission_hash, a_datum_token_hash, sizeof ( *a_datum_token_hash ) );
+    if(a_ticker_len >= sizeof(l_item->header.ticker))
+        a_ticker_len = sizeof(l_item->header.ticker) - 1;
+    strncpy(l_item->header.ticker, a_ticker, a_ticker_len);
+
+    return l_item;
+}
+
+/**
+ * Create item dap_chain_tx_out_t
+ *
+ * return item, NULL Error
+ */
+dap_chain_tx_in_t* dap_chain_datum_tx_item_in_create(dap_chain_hash_fast_t *a_tx_prev_hash, uint32_t a_tx_out_prev_idx)
+{
+    if(!a_tx_prev_hash)
+        return NULL;
+    dap_chain_tx_in_t *l_item = DAP_NEW_Z(dap_chain_tx_in_t);
+    l_item->header.type = TX_ITEM_TYPE_IN;
+    l_item->header.tx_out_prev_idx = a_tx_out_prev_idx;
+    memcpy(&l_item->header.tx_prev_hash, a_tx_prev_hash, sizeof(dap_chain_hash_fast_t));
+    return l_item;
+}
+
+/**
+ * @brief dap_chain_datum_tx_item_in_cond_create
+ * @param a_pkey_serialized
+ * @param a_pkey_serialized_size
+ * @param a_receipt_idx
+ * @return
+ */
+dap_chain_tx_in_cond_t* dap_chain_datum_tx_item_in_cond_create(dap_chain_hash_fast_t *a_tx_prev_hash, uint32_t a_tx_out_prev_idx,
+                                                               uint32_t a_receipt_idx)
+{
+    if(!a_tx_prev_hash )
+        return NULL;
+    dap_chain_tx_in_cond_t *l_item = DAP_NEW_Z(dap_chain_tx_in_cond_t);
+    l_item->header.type = TX_ITEM_TYPE_IN;
+    l_item->header.receipt_idx = a_receipt_idx;
+    l_item->header.tx_out_prev_idx = a_tx_out_prev_idx;
+    memcpy(&l_item->header.tx_prev_hash, a_tx_prev_hash,sizeof(l_item->header.tx_prev_hash) );
+    return l_item;
+}
+
+/**
+ * Create item dap_chain_tx_out_t
+ *
+ * return item, NULL Error
+ */
+dap_chain_tx_out_t* dap_chain_datum_tx_item_out_create(const dap_chain_addr_t *a_addr, uint64_t a_value)
+{
+    if(!a_addr)
+        return NULL;
+    dap_chain_tx_out_t *l_item = DAP_NEW_Z(dap_chain_tx_out_t);
+    l_item->header.type = TX_ITEM_TYPE_OUT;
+    l_item->header.value = a_value;
+    memcpy(&l_item->addr, a_addr, sizeof(dap_chain_addr_t));
+    return l_item;
+}
+
+/**
+ * Create item dap_chain_tx_out_cond_t
+ *
+ * return item, NULL Error
+ */
+dap_chain_tx_out_cond_t* dap_chain_datum_tx_item_out_cond_create_srv_pay(dap_enc_key_t *a_key, dap_chain_net_srv_uid_t a_srv_uid,
+        uint64_t a_value,uint64_t a_value_max_per_unit, dap_chain_net_srv_price_unit_uid_t a_unit,
+                                                                 const void *a_params, size_t a_params_size)
+{
+    if(!a_key || !a_params)
+        return NULL;
+    size_t l_pub_key_size = 0;
+    uint8_t *l_pub_key = dap_enc_key_serealize_pub_key(a_key, &l_pub_key_size);
+
+
+    dap_chain_tx_out_cond_t *l_item = DAP_NEW_Z_SIZE(dap_chain_tx_out_cond_t,
+            sizeof(l_item->header)+sizeof (l_item->subtype.srv_pay.header) + a_params_size);
+    l_item->header.item_type = TX_ITEM_TYPE_OUT_COND;
+    l_item->header.value = a_value;
+    l_item->header.subtype = DAP_CHAIN_TX_OUT_COND_SUBTYPE_SRV_PAY; // By default creatre cond for service pay. Rework with smth more flexible
+    l_item->subtype.srv_pay.header.srv_uid = a_srv_uid;
+    l_item->subtype.srv_pay.header.params_size = (uint32_t) a_params_size;
+    l_item->subtype.srv_pay.header.unit = a_unit;
+    l_item->subtype.srv_pay.header.unit_price_max_datoshi = a_value_max_per_unit;
+    dap_hash_fast( l_pub_key, l_pub_key_size, & l_item->subtype.srv_pay.header.pkey_hash);
+    memcpy(l_item->subtype.srv_pay.params, a_params, a_params_size);
+    return l_item;
+}
+
+
+/**
+ * Create item dap_chain_tx_sig_t
+ *
+ * return item, NULL Error
+ */
+dap_chain_tx_sig_t* dap_chain_datum_tx_item_sign_create(dap_enc_key_t *a_key, const void *a_data, size_t a_data_size)
+{
+    if(!a_key || !a_data || !a_data_size)
+        return NULL;
+    dap_sign_t *l_chain_sign = dap_sign_create(a_key, a_data, a_data_size, 0);
+    size_t l_chain_sign_size = dap_sign_get_size(l_chain_sign); // sign data
+    if(!l_chain_sign) {
+        return NULL;
+    }
+    dap_chain_tx_sig_t *l_tx_sig = DAP_NEW_Z_SIZE(dap_chain_tx_sig_t,
+            sizeof(dap_chain_tx_sig_t) + l_chain_sign_size);
+    l_tx_sig->header.type = TX_ITEM_TYPE_SIG;
+    l_tx_sig->header.sig_size =(uint32_t) l_chain_sign_size;
+    memcpy(l_tx_sig->sig, l_chain_sign, l_chain_sign_size);
+    DAP_DELETE(l_chain_sign);
+    return l_tx_sig;
+}
+
+/**
+ * Get sign from sign item
+ *
+ * return sign, NULL Error
+ */
+dap_sign_t* dap_chain_datum_tx_item_sign_get_sig(dap_chain_tx_sig_t *a_tx_sig)
+{
+    if(!a_tx_sig || !a_tx_sig->header.sig_size)
+        return NULL;
+    return (dap_sign_t*) a_tx_sig->sig;
+}
+
+/**
+ * Get item from transaction
+ *
+ * a_tx [in] transaction
+ * a_item_idx_start[in/out] start index / found index of item in transaction, if 0 then from beginning
+ * a_type[in] type of item being find, if TX_ITEM_TYPE_ANY - any item
+ * a_item_out_size size[out] size of returned item
+ * return item data, NULL Error index or bad format transaction
+ */
+uint8_t* dap_chain_datum_tx_item_get( dap_chain_datum_tx_t *a_tx, int *a_item_idx_start,
+        dap_chain_tx_item_type_t a_type, int *a_item_out_size)
+{
+    if(!a_tx)
+        return NULL;
+    uint32_t l_tx_items_pos = 0, l_tx_items_size = a_tx->header.tx_items_size;
+    int l_item_idx = 0;
+    while(l_tx_items_pos < l_tx_items_size) {
+         uint8_t *l_item = a_tx->tx_items + l_tx_items_pos;
+        int l_item_size = dap_chain_datum_item_tx_get_size(l_item);
+        if(!l_item_size)
+            return NULL;
+        // check index
+        if(!a_item_idx_start || l_item_idx >= *a_item_idx_start) {
+            // check type
+            if(a_type == TX_ITEM_TYPE_ANY || a_type == dap_chain_datum_tx_item_get_type(l_item)) {
+                if(a_item_idx_start)
+                    *a_item_idx_start = l_item_idx;
+                if(a_item_out_size)
+                    *a_item_out_size = l_item_size;
+                return l_item;
+            }
+        }
+        l_tx_items_pos += l_item_size;
+        l_item_idx++;
+    }
+    return NULL;
+}
+
+/**
+ * Get all item from transaction by type
+ *
+ * a_tx [in] transaction
+ * a_item_idx_start[in/out] start index / found index of item in transaction, if 0 then from beginning
+ * a_type[in] type of item being find, if TX_ITEM_TYPE_ANY - any item
+ * a_item_count[out] count of returned item
+ * return item data, NULL Error index or bad format transaction
+ */
+dap_list_t* dap_chain_datum_tx_items_get(dap_chain_datum_tx_t *a_tx, dap_chain_tx_item_type_t a_type, int *a_item_count)
+{
+    dap_list_t *items_list = NULL;
+    int l_items_count = 0, l_item_idx_start = 0;
+    // Get sign item from transaction
+    while(1) {
+        uint8_t *l_tx_item = dap_chain_datum_tx_item_get(a_tx, &l_item_idx_start, a_type, NULL);
+        if(!l_tx_item)
+            break;
+        items_list = dap_list_append(items_list, l_tx_item);
+        l_items_count++;
+        l_item_idx_start++;
+    }
+    if(a_item_count)
+        *a_item_count = l_items_count;
+    return items_list;
+}

libdap-chain-common/src/dap_chain_datum_tx_out_cond.c

+/*
+ * Authors:
+ * Dmitriy A. Gearasimov <gerasimov.dmitriy@demlabs.net>
+ * Alexander Lysikov <alexander.lysikov@demlabs.net>
+ * DeM Labs Inc.   https://demlabs.net
+ * DeM Labs Open source community https://github.com/demlabsinc
+ * Copyright  (c) 2017-2019
+ * 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 <stdint.h>
+#include "dap_common.h"
+#include "dap_chain_common.h"
+#include "dap_chain_datum_tx_out_cond.h"
+
+uint8_t* dap_chain_datum_tx_out_cond_item_get_params(dap_chain_tx_out_cond_t *a_tx_out_cond, size_t *a_cond_size_out)
+{
+    if(a_tx_out_cond) {
+        switch (a_tx_out_cond->header.subtype ) {
+            case DAP_CHAIN_TX_OUT_COND_SUBTYPE_SRV_PAY:{
+                if(a_cond_size_out)
+                    *a_cond_size_out = a_tx_out_cond->subtype.srv_pay.header.params_size;
+                return a_tx_out_cond->subtype.srv_pay.params;
+            }
+            default: return NULL;
+        }
+    }
+    return NULL;
+}
+