hash: added dogecoin_hashwriter_free

auxpow: updated check_merkle_branch iterator to size_t and hash parameters
block: updated dogecoin_block_header_new to initialize header
block: updated dogecoin_block_header_free to clear version and removed debug print
block: updated dogecoin_block_header_copy to copy auxpow
block: updated header and dogecoin_block_header_serialize/deserialize to signed version
headersdb_file: updated dogecoin_headers_db_free to free chaintip to chainbottom
headersdb_file: updated dogecoin_headers_db_connect_hdr to free blockindex
headersdb_file: updated dogecoin_headers_db_connect_hdr with todo
spv: updated dogecoin_spv_client_free to check for headers_db_ctx
spv: updated dogecoin_net_spv_post_cmd to recover after invalid headers and blocks
spv: updated dogecoin_net_spv_periodic_statecheck to continue after full block sync
spv: updated dogecoin_net_spv_request_headers to recover after invalid headers and blocks
transaction: updated sign_transaction_w_privkey to free script_pubkey and txtmp
tx: updated dogecoin_tx_out_pubkey_hash_to_p2pkh_address to free copy of txout
wallet: removed dogecoin_wallet_add_to_spent as dogecoin_wallet_scrape_utxos already handles spends
wallet: updated dogecoin_wallet_new frees and to call dogecoin_hdnode_free
wallet: updated dogecoin_wallet_free to call dogecoin_btree_tdestroy with NULL/free
wallet: updated dogecoin_wallet_create to check for open wallet file

include/dogecoin/block.h

@@ -48,7 +48,7 @@ typedef struct _auxpow {
 } auxpow;
 
 typedef struct dogecoin_block_header_ {
-    uint32_t version;
+    int32_t version;
     uint256 prev_block;
     uint256 merkle_root;
     uint32_t timestamp;

include/dogecoin/hash.h

@@ -189,6 +189,12 @@ static hashwriter* init_hashwriter(int n_type, int n_version) {
     return hw;
 }
 
+static void dogecoin_hashwriter_free(hashwriter* hw) {
+    free(hw->ctx->sha);
+    free(hw->ctx);
+    dogecoin_free(hw->hash);
+    dogecoin_free(hw);
+}
 
 /** SipHash 2-4 */
 typedef struct siphasher {

include/dogecoin/wallet.h

@@ -173,7 +173,6 @@ LIBDOGECOIN_API int64_t dogecoin_wallet_wtx_get_available_credit(dogecoin_wallet
 LIBDOGECOIN_API dogecoin_bool dogecoin_wallet_txout_is_mine(dogecoin_wallet* wallet, dogecoin_tx_out* tx_out);
 
 /** checks if a transaction outpoint is owned by the wallet */
-LIBDOGECOIN_API void dogecoin_wallet_add_to_spent(dogecoin_wallet* wallet, const dogecoin_wtx* wtx);
 LIBDOGECOIN_API dogecoin_bool dogecoin_wallet_is_spent(dogecoin_wallet* wallet, uint256 hash, uint32_t n);
 LIBDOGECOIN_API dogecoin_bool dogecoin_wallet_get_unspents(dogecoin_wallet* wallet, vector* unspents);
 LIBDOGECOIN_API dogecoin_bool dogecoin_wallet_get_unspent(dogecoin_wallet* wallet, vector* unspent);

src/auxpow.c

@@ -65,14 +65,14 @@ uint256* check_merkle_branch(uint256* hash, const vector* merkle_branch, int ind
     uint256* current_hash = dogecoin_uint256_vla(1);
     memcpy(current_hash, hash, sizeof(uint256)); // Copy the initial hash
 
-    for (int i = 0; i < merkle_branch->len; ++i) {
+    for (size_t i = 0; i < merkle_branch->len; ++i) {
         uint256* next_branch_hash = (uint256*)vector_idx(merkle_branch, i);
         uint256* new_hash;
 
         if (index & 1) {
-            new_hash = Hash(next_branch_hash, current_hash);
+            new_hash = Hash((const uint256*) next_branch_hash, (const uint256*) current_hash);
         } else {
-            new_hash = Hash(current_hash, next_branch_hash);
+            new_hash = Hash((const uint256*) current_hash, (const uint256*) next_branch_hash);
         }
 
         memcpy(current_hash, new_hash, sizeof(uint256)); // Update the current hash

src/block.c

@@ -159,6 +159,14 @@ dogecoin_bool check(void *ctx, uint256* hash, uint32_t chainid, dogecoin_chainpa
 dogecoin_block_header* dogecoin_block_header_new() {
     dogecoin_block_header* header;
     header = dogecoin_calloc(1, sizeof(*header));
+    header->version = 0;
+    dogecoin_mem_zero(&header->prev_block, DOGECOIN_HASH_LENGTH);
+    dogecoin_mem_zero(&header->merkle_root, DOGECOIN_HASH_LENGTH);
+    header->bits = 0;
+    header->timestamp = 0;
+    header->nonce = 0;
+    header->auxpow->check = check;
+    header->auxpow->ctx = header;
     return header;
     }
 
@@ -173,10 +181,10 @@ dogecoin_auxpow_block* dogecoin_auxpow_block_new() {
     block->parent_coinbase = dogecoin_tx_new();
     dogecoin_mem_zero(&block->parent_hash, DOGECOIN_HASH_LENGTH);
     block->parent_merkle_count = 0;
-    block->parent_coinbase_merkle;
+    block->parent_coinbase_merkle = NULL;
     block->parent_merkle_index = 0;
     block->aux_merkle_count = 0;
-    block->aux_merkle_branch;
+    block->aux_merkle_branch = NULL;
     block->aux_merkle_index = 0;
     block->parent_header = dogecoin_block_header_new();
     block->header->auxpow->check = check;
@@ -194,7 +202,7 @@ dogecoin_auxpow_block* dogecoin_auxpow_block_new() {
  */
 void dogecoin_block_header_free(dogecoin_block_header* header) {
     if (!header) return;
-    header->version = 1;
+    header->version = 0;
     dogecoin_mem_zero(&header->prev_block, DOGECOIN_HASH_LENGTH);
     dogecoin_mem_zero(&header->merkle_root, DOGECOIN_HASH_LENGTH);
     header->bits = 0;
@@ -300,12 +308,13 @@ void print_block(dogecoin_auxpow_block* block) {
  *
  * @param header The header object to be constructed.
  * @param buf The buffer to deserialize from.
+ * @param params The chain parameters.
  *
  * @return 1 if deserialization was successful, 0 otherwise.
  */
 int dogecoin_block_header_deserialize(dogecoin_block_header* header, struct const_buffer* buf, const dogecoin_chainparams *params) {
     dogecoin_auxpow_block* block = dogecoin_auxpow_block_new();
-    if (!deser_u32(&block->header->version, buf))
+    if (!deser_s32(&block->header->version, buf))
         return false;
     if (!deser_u256(block->header->prev_block, buf))
         return false;
@@ -392,7 +401,7 @@ int deserialize_dogecoin_auxpow_block(dogecoin_auxpow_block* block, struct const
         printf("%s:%d:%s:%s\n", __FILE__, __LINE__, __func__, strerror(errno));
         return false;
     }
-    if (!deser_u32(&block->parent_header->version, buffer)) {
+    if (!deser_s32(&block->parent_header->version, buffer)) {
         printf("%s:%d:%s:%s\n", __FILE__, __LINE__, __func__, strerror(errno));
         return false;
     }
@@ -419,7 +428,6 @@ int deserialize_dogecoin_auxpow_block(dogecoin_auxpow_block* block, struct const
 
     if (!check_auxpow(block, (dogecoin_chainparams*)params)) {
         printf("check_auxpow failed!\n");
-        print_block(block);
         return false;
     }
 
@@ -436,7 +444,7 @@ int deserialize_dogecoin_auxpow_block(dogecoin_auxpow_block* block, struct const
  * @return Nothing.
  */
 void dogecoin_block_header_serialize(cstring* s, const dogecoin_block_header* header) {
-    ser_u32(s, header->version);
+    ser_s32(s, header->version);
     ser_u256(s, header->prev_block);
     ser_u256(s, header->merkle_root);
     ser_u32(s, header->timestamp);
@@ -460,6 +468,8 @@ void dogecoin_block_header_copy(dogecoin_block_header* dest, const dogecoin_bloc
     dest->timestamp = src->timestamp;
     dest->bits = src->bits;
     dest->nonce = src->nonce;
+    dest->auxpow->check = src->auxpow->check;
+    dest->auxpow->ctx = src->auxpow->ctx;
     }
 
 /**

src/headersdb_file.c

@@ -117,10 +117,30 @@ void dogecoin_headers_db_free(dogecoin_headers_db* db) {
     }
 
     if (db->tree_root) {
-        dogecoin_btree_tdestroy(db->tree_root, dogecoin_free);
+        dogecoin_btree_tdestroy(db->tree_root, NULL);
         db->tree_root = NULL;
     }
 
+    // Free all blockindex structures starting from chaintip to chainbottom
+    if (db->chaintip) {
+        dogecoin_blockindex *scan_tip = db->chaintip;
+        while (scan_tip && scan_tip != db->chainbottom) {
+            dogecoin_blockindex *prev = scan_tip->prev;
+            if (scan_tip) {
+                dogecoin_free(scan_tip);
+            }
+            scan_tip = prev;
+        }
+    }
+
+    // Free the chainbottom
+    if (db->chainbottom) {
+        dogecoin_free(db->chainbottom);
+    }
+
+    db->chaintip = NULL;
+    db->chainbottom = NULL;
+
     dogecoin_free(db);
 }
 
@@ -261,7 +281,12 @@ dogecoin_blockindex * dogecoin_headers_db_connect_hdr(dogecoin_headers_db* db, s
     *connected = false;
 
     dogecoin_blockindex *blockindex = dogecoin_calloc(1, sizeof(dogecoin_blockindex));
-    if (!dogecoin_block_header_deserialize(&blockindex->header, buf, db->params)) return NULL;
+    if (!dogecoin_block_header_deserialize(&blockindex->header, buf, db->params))
+    {
+        dogecoin_free(blockindex);
+        fprintf(stderr, "Error deserializing block header\n");
+        return NULL;
+    }
 
     dogecoin_block_header_hash(&blockindex->header, (uint8_t *)&blockindex->hash);
 
@@ -313,7 +338,8 @@ dogecoin_blockindex * dogecoin_headers_db_connect_hdr(dogecoin_headers_db* db, s
             }
         }
         if (db->use_binary_tree) {
-            dogecoin_btree_tfind(blockindex, &db->tree_root, dogecoin_header_compare);
+            /* TODO: update when fork handling is implemented */
+            dogecoin_btree_tfind(blockindex, &db->tree_root, dogecoin_header_compare); false;
         }
 
         if (db->max_hdr_in_mem > 0) {
@@ -340,14 +366,12 @@ dogecoin_blockindex * dogecoin_headers_db_connect_hdr(dogecoin_headers_db* db, s
             }
         }
         *connected = true;
+        return blockindex;
+    } else {
+        // Connection not established, free allocated memory
+        dogecoin_free(blockindex);
+        return NULL;
     }
-    else {
-        //TODO, add to orphans
-        char hex[65] = {0};
-        utils_bin_to_hex(blockindex->hash, DOGECOIN_HASH_LENGTH, hex);
-    }
-
-    return blockindex;
 }
 
 /**