tx mempool start, hello packet

src/txmempool.c

@@ -0,0 +1,71 @@
+#include <txmempool.h>
+
+khash_t(tx_mempool_map_m)* txMempool = NULL;
+
+void TxMempool_Init() {
+    txMempool = kh_init(tx_mempool_map_m);
+}
+
+int TxMempool_Insert(signed_transaction_t tx) {
+    if (!txMempool) { return -1; }
+
+    uint8_t txHash[32];
+    Transaction_CalculateHash(&tx.transaction, txHash);
+
+    key32_t key;
+    memcpy(key.bytes, txHash, 32);
+
+    int ret;
+    khiter_t k = kh_put(tx_mempool_map_m, txMempool, key, &ret);
+    if (k == kh_end(txMempool)) {
+        return -1;
+    }
+
+    kh_value(txMempool, k) = tx;
+
+    return ret;
+}
+
+bool TxMempool_Lookup(uint8_t* txHash, signed_transaction_t* out) {
+    if (!txMempool || !txHash || !out) { return false; }
+    
+    key32_t key;
+    memcpy(key.bytes, txHash, 32);
+
+    khiter_t k = kh_get(tx_mempool_map_m, txMempool, key);
+    if (k != kh_end(txMempool)) {
+        signed_transaction_t tx = kh_value(txMempool, k);
+        memcpy(out, &tx, sizeof(signed_transaction_t));
+        return true;
+    }
+
+    return false;
+}
+
+void TxMempool_Print() {
+    if (!txMempool) { return; }
+
+    khiter_t k;
+    for (k = kh_begin(txMempool); k != kh_end(txMempool); ++k) {
+        if (kh_exist(txMempool, k)) {
+            signed_transaction_t tx = kh_val(txMempool, k);
+            char senderHex[65];
+            char recipient1Hex[65];
+            char recipient2Hex[65];
+            AddressToHexString(tx.transaction.senderAddress, senderHex);
+            AddressToHexString(tx.transaction.recipientAddress1, recipient1Hex);
+            AddressToHexString(tx.transaction.recipientAddress2, recipient2Hex);
+            printf("TX in mempool: sender=%s recipient1=%s recipient2=%s amount1=%llu amount2=%llu fee=%llu\n",
+                senderHex, recipient1Hex, recipient2Hex,
+                (unsigned long long)tx.transaction.amount1,
+                (unsigned long long)tx.transaction.amount2,
+                (unsigned long long)tx.transaction.fee);
+        }
+    }
+}
+
+void TxMempool_Destroy() {
+    if (txMempool) {
+        kh_destroy(tx_mempool_map_m, txMempool);
+    }
+}