Merge submodule into libdap-chain-cs-dag-pos

libdap-chain-cs-dag-pos @ 9efcf385

-Subproject commit 9efcf38501fd1997019119c9660883a254045e18

libdap-chain-cs-dag-pos/.gitignore

+# Prerequisites
+*.d
+
+# Object files
+*.o
+*.ko
+*.obj
+*.elf
+
+# Linker output
+*.ilk
+*.map
+*.exp
+
+# Precompiled Headers
+*.gch
+*.pch
+
+# Libraries
+*.lib
+*.a
+*.la
+*.lo
+
+# Shared objects (inc. Windows DLLs)
+*.dll
+*.so
+*.so.*
+*.dylib
+
+# Executables
+*.exe
+*.out
+*.app
+*.i*86
+*.x86_64
+*.hex
+
+# Debug files
+*.dSYM/
+*.su
+*.idb
+*.pdb
+
+# Kernel Module Compile Results
+*.mod*
+*.cmd
+.tmp_versions/
+modules.order
+Module.symvers
+Mkfile.old
+dkms.conf

libdap-chain-cs-dag-pos/CMakeLists.txt

+cmake_minimum_required(VERSION 2.8)
+project (dap_chain_cs_dag_pos)
+  
+set(DAP_CHAIN_CS_DAG_POS_SRCS 
+  dap_chain_cs_dag_pos.c 
+        )
+
+set(DAP_CHAIN_CS_DAG_POS_HEADERS
+        dap_chain_cs_dag_pos.h
+    )
+
+if(WIN32)
+  include_directories(../3rdparty/wepoll/)
+  include_directories(../3rdparty/uthash/src/)
+endif()
+
+add_library(${PROJECT_NAME} STATIC ${DAP_CHAIN_CS_DAG_POS_SRCS} ${DAP_CHAIN_CS_DAG_POS_HEADERS})
+
+target_link_libraries(dap_chain_cs_dag_pos dap_core dap_crypto dap_chain dap_chain_crypto dap_chain_cs_dag )
+target_include_directories(dap_chain_cs_dag_pos INTERFACE .)

libdap-chain-cs-dag-pos/LICENSE

+                    GNU GENERAL PUBLIC LICENSE
+                       Version 3, 29 June 2007
+
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+<http://www.gnu.org/philosophy/why-not-lgpl.html>.

libdap-chain-cs-dag-pos/README.md

+# libdap-chain-cs-pos
+DapChain Consensus Proof-of-Stake (PoS)

libdap-chain-cs-dag-pos/dap_chain_cs_dag_pos.c

+/*
+ * Authors:
+ * Dmitriy A. Gearasimov <gerasimov.dmitriy@demlabs.net>
+ * DeM Labs Inc.   https://demlabs.net
+ * Kelvin Project https://github.com/kelvinblockchain
+ * 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 <stdlib.h>
+
+#include "dap_common.h"
+#include "dap_string.h"
+#include "dap_strfuncs.h"
+#include "dap_chain_net.h"
+#include "dap_chain_cs.h"
+#include "dap_chain_cs_dag.h"
+#include "dap_chain_cs_dag_pos.h"
+
+#include "dap_chain_ledger.h"
+
+#define LOG_TAG "dap_chain_cs_dag_pos"
+
+typedef struct dap_chain_cs_dag_pos_pvt
+{
+    dap_cert_t * events_sign_wallet;
+    char ** tokens_hold;
+    uint64_t * tokens_hold_value;
+    size_t tokens_hold_size;
+    uint16_t confirmations_minimum;
+} dap_chain_cs_dag_pos_pvt_t;
+
+#define PVT(a) ((dap_chain_cs_dag_pos_pvt_t *) a->_pvt )
+
+static void s_callback_delete(dap_chain_cs_dag_t * a_dag);
+static int s_callback_new(dap_chain_t * a_chain, dap_config_t * a_chain_cfg);
+static int s_callback_created(dap_chain_t * a_chain, dap_config_t *a_chain_cfg);
+static int s_callback_event_verify(dap_chain_cs_dag_t * a_dag, dap_chain_cs_dag_event_t * a_dag_event);
+static dap_chain_cs_dag_event_t * s_callback_event_create(dap_chain_cs_dag_t * a_dag, dap_chain_datum_t * a_datum,
+                                                          dap_chain_hash_fast_t * a_hashes, size_t a_hashes_count);
+
+/**
+ * @brief dap_chain_cs_dag_pos_init
+ * @return
+ */
+int dap_chain_cs_dag_pos_init()
+{
+    dap_chain_cs_add ("dag_pos", s_callback_new );
+    return 0;
+}
+
+/**
+ * @brief dap_chain_cs_dag_pos_deinit
+ */
+void dap_chain_cs_dag_pos_deinit(void)
+{
+
+}
+
+/**
+ * @brief s_cs_callback
+ * @param a_chain
+ * @param a_chain_cfg
+ */
+static int s_callback_new(dap_chain_t * a_chain, dap_config_t * a_chain_cfg)
+{
+    dap_chain_cs_dag_new(a_chain,a_chain_cfg);
+    dap_chain_cs_dag_t * l_dag = DAP_CHAIN_CS_DAG ( a_chain );
+    dap_chain_cs_dag_pos_t * l_pos = DAP_NEW_Z ( dap_chain_cs_dag_pos_t);
+    l_dag->_inheritor = l_pos;
+    l_dag->callback_delete = s_callback_delete;
+    l_dag->callback_cs_verify = s_callback_event_verify;
+    l_dag->callback_cs_event_create = s_callback_event_create;
+    l_pos->_pvt = DAP_NEW_Z ( dap_chain_cs_dag_pos_pvt_t );
+
+    dap_chain_cs_dag_pos_pvt_t * l_pos_pvt = PVT ( l_pos );
+
+    char ** l_tokens_hold = NULL;
+    char ** l_tokens_hold_value_str = NULL;
+    uint16_t l_tokens_hold_size = 0;
+    uint16_t l_tokens_hold_value_size = 0;
+
+    l_tokens_hold = dap_config_get_array_str( a_chain_cfg,"dag-pos","tokens_hold",&l_tokens_hold_size);
+    l_tokens_hold_value_str = dap_config_get_array_str( a_chain_cfg,"dag-pos","tokens_hold_value",&l_tokens_hold_value_size);
+
+    if ( l_tokens_hold_size != l_tokens_hold_value_size ){
+        log_it(L_CRITICAL, "tokens_hold and tokens_hold_value are different size!");
+        goto lb_err;
+    }
+    l_pos_pvt->confirmations_minimum = dap_config_get_item_uint16_default( a_chain_cfg,"dag-pos","confirmations_minimum",1);
+    l_pos_pvt->tokens_hold_size = l_tokens_hold_size;
+    l_pos_pvt->tokens_hold = DAP_NEW_Z_SIZE( char*, sizeof(char*) *
+                                             l_tokens_hold_size );
+
+    l_pos_pvt->tokens_hold_value = DAP_NEW_Z_SIZE(uint64_t,
+                                                  (l_tokens_hold_value_size +1) *sizeof (uint64_t));
+
+    for (size_t i = 0; i < l_tokens_hold_value_size; i++){
+        l_pos_pvt->tokens_hold[i] = dap_strdup( l_tokens_hold[i] );
+        if ( ( l_pos_pvt->tokens_hold_value[i] =
+               strtoull(l_tokens_hold_value_str[i],NULL,10) ) == 0 ) {
+             log_it(L_CRITICAL, "Token %s has inproper hold value \"%s\"",l_pos_pvt->tokens_hold[i],
+                    l_pos_pvt->tokens_hold_value[i] );
+             goto lb_err;
+        }
+    }
+    l_dag->chain->callback_created = s_callback_created;
+    return 0;
+
+lb_err:
+    for (int i = 0; i < l_tokens_hold_size; i++ )
+        DAP_DELETE(l_tokens_hold[i]);
+    DAP_DELETE(l_tokens_hold);
+    DAP_DELETE( l_pos_pvt->tokens_hold_value);
+    DAP_DELETE( l_pos_pvt);
+    DAP_DELETE(l_pos );
+    l_dag->_inheritor = NULL;
+    l_dag->callback_delete = NULL;
+    l_dag->callback_cs_verify = NULL;
+    return -1;
+
+}
+
+/**
+ * @brief s_callback_created
+ * @param a_chain
+ * @param a_chain_cfg
+ * @return
+ */
+static int s_callback_created(dap_chain_t * a_chain, dap_config_t *a_chain_net_cfg)
+{
+    dap_chain_cs_dag_t * l_dag = DAP_CHAIN_CS_DAG ( a_chain );
+    dap_chain_cs_dag_pos_t * l_pos = DAP_CHAIN_CS_DAG_POS( l_dag );
+
+    const char * l_events_sign_wallet = NULL;
+    if ( ( l_events_sign_wallet = dap_config_get_item_str(a_chain_net_cfg,"dag-pos","events-sign-wallet") ) != NULL ) {
+
+        if ( ( PVT(l_pos)->events_sign_wallet = dap_cert_find_by_name(l_events_sign_wallet)) == NULL ){
+            log_it(L_ERROR,"Can't load events sign certificate, name \"%s\" is wrong",l_events_sign_wallet);
+        }else
+            log_it(L_NOTICE,"Loaded \"%s\" certificate to sign pos event", l_events_sign_wallet);
+
+    }
+    return 0;
+}
+
+
+/**
+ * @brief s_chain_cs_dag_callback_delete
+ * @param a_dag
+ */
+static void s_callback_delete(dap_chain_cs_dag_t * a_dag)
+{
+    dap_chain_cs_dag_pos_t * l_pos = DAP_CHAIN_CS_DAG_POS ( a_dag );
+
+    if ( l_pos->_pvt ) {
+        dap_chain_cs_dag_pos_pvt_t * l_pos_pvt = PVT ( l_pos );
+        DAP_DELETE ( l_pos_pvt);
+    }
+
+    if ( l_pos->_inheritor ) {
+       DAP_DELETE ( l_pos->_inheritor );
+    }
+}
+
+/**
+ * @brief s_callback_event_create
+ * @param a_dag
+ * @param a_datum
+ * @param a_hashes
+ * @param a_hashes_count
+ * @return
+ */
+static dap_chain_cs_dag_event_t * s_callback_event_create(dap_chain_cs_dag_t * a_dag, dap_chain_datum_t * a_datum,
+                                                          dap_chain_hash_fast_t * a_hashes, size_t a_hashes_count)
+{
+    dap_return_val_if_fail(a_dag && a_dag->chain && DAP_CHAIN_CS_DAG_POS(a_dag) && a_datum, NULL);
+    dap_chain_net_t * l_net = dap_chain_net_by_name( a_dag->chain->net_name );
+    dap_chain_cs_dag_pos_t * l_pos = DAP_CHAIN_CS_DAG_POS(a_dag);
+
+    if( PVT(l_pos)->events_sign_wallet == NULL) {
+        log_it(L_ERROR, "Can't sign event with events-sign-wallet in [dag-pos] section");
+        return NULL;
+    }
+    if(a_datum || (a_hashes && a_hashes_count)) {
+        dap_chain_cs_dag_event_t * l_event = dap_chain_cs_dag_event_new(a_dag->chain->id, l_net->pub.cell_id, a_datum,
+        PVT(l_pos)->events_sign_wallet->enc_key, a_hashes, a_hashes_count);
+        return l_event;
+    } else
+        return NULL;
+}
+
+/**
+ * @brief s_callback_event_verify
+ * @param a_dag
+ * @param a_dag_event
+ * @return
+ */
+static int s_callback_event_verify(dap_chain_cs_dag_t * a_dag, dap_chain_cs_dag_event_t * a_dag_event)
+{
+
+    dap_chain_cs_dag_pos_t * l_pos =DAP_CHAIN_CS_DAG_POS( a_dag ) ;
+    dap_chain_cs_dag_pos_pvt_t * l_pos_pvt = PVT ( DAP_CHAIN_CS_DAG_POS( a_dag ) );
+
+    if(a_dag->chain->ledger == NULL)
+        return -3;
+
+    if ( a_dag_event->header.signs_count >= l_pos_pvt->confirmations_minimum ){
+        uint16_t l_verified_num = 0;
+        dap_chain_addr_t l_addr = { 0 };
+
+        for ( size_t l_sig_pos=0; l_sig_pos < a_dag_event->header.signs_count; l_sig_pos++ ){
+            dap_sign_t * l_sign = dap_chain_cs_dag_event_get_sign(a_dag_event,0);
+            if ( l_sign == NULL){
+                log_it(L_WARNING, "Event is NOT signed with anything");
+                return -4;
+            }
+
+            dap_enc_key_t * l_key = dap_sign_to_enc_key( l_sign);
+            if ( l_key == NULL){
+                log_it(L_WARNING, "Event's sign has no any key");
+                return -5;
+            }
+
+            dap_chain_addr_fill (&l_addr,l_key,&a_dag->chain->net_id );
+            dap_enc_key_delete (l_key); // TODO cache all this operations to prevent useless memory copy ops
+
+            /*
+            dap_chain_datum_t *l_datum = dap_chain_cs_dag_event_get_datum(a_dag_event);
+            // transaction include emission?
+            bool l_is_emit = false;
+            if(l_datum && l_datum->header.type_id == DAP_CHAIN_DATUM_TX) {
+                // transaction
+                dap_chain_datum_tx_t *l_tx = (dap_chain_datum_tx_t*) l_datum->data;
+                // find Token items
+                dap_list_t *l_list_tx_token = dap_chain_datum_tx_items_get(l_tx, TX_ITEM_TYPE_TOKEN, NULL);
+                if(l_list_tx_token)
+                    l_is_emit = true;
+                dap_list_free(l_list_tx_token);
+            }
+            // if emission then the wallet can be with zero balance
+            if(l_is_emit)
+                return 0;*/
+
+            bool l_is_enough_balance = false;
+            for (size_t i =0; i <l_pos_pvt->tokens_hold_size; i++){
+                if ( dap_chain_ledger_calc_balance ( a_dag->chain->ledger , &l_addr, l_pos_pvt->tokens_hold[i] ) >= l_pos_pvt->tokens_hold_value[i]  ){
+                    l_verified_num++;
+                    l_is_enough_balance = true;
+                    break;
+                }
+            }
+            if (! l_is_enough_balance ){
+                char *l_addr_str = dap_chain_addr_to_str(&l_addr);
+                log_it(L_WARNING, "Verify of event is false, because bal=0 for addr=%s", l_addr_str);
+                DAP_DELETE(l_addr_str);
+                return -1;
+            }
+        }
+
+        // Check number
+        if ( l_verified_num >= l_pos_pvt->confirmations_minimum ){
+            // Passed all checks
+            return 0;
+        }else{
+            log_it(L_WARNING, "Wrong event: only %su/%su signs are valid", l_verified_num, l_pos_pvt->confirmations_minimum );
+            return -2;
+        }
+    }else
+       return -2; // Wrong signatures number
+}

libdap-chain-cs-dag-pos/dap_chain_cs_dag_pos.h

+/*
+ * 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/>.
+*/
+#pragma once
+#include "dap_chain_cs_dag.h"
+#include "dap_cert.h"
+
+typedef struct dap_chain_cs_dag_pos
+{
+    dap_chain_t * chain;
+    dap_chain_cs_dag_t * dag;
+    void * _pvt;
+    void * _inheritor;
+} dap_chain_cs_dag_pos_t;
+
+#define DAP_CHAIN_CS_DAG_POS(a) ( (dap_chain_cs_dag_pos_t *) (a)->_inheritor)
+
+
+int dap_chain_cs_dag_pos_init();
+void dap_chain_cs_dag_pos_deinit(void);