tx mempool start, hello packet

src/main.c

@@ -561,8 +561,15 @@ int main(int argc, char* argv[]) {
                 }
 
                 free(block); // Chain stores block by value and owns copied transaction array.
+
+                if (i % 1000 == 0) {
+                    // Mid-mine flush
+                    (void)FlushChainAndSheet(chain, chainDataDir, currentSupply, currentReward);
+                }
             }
 
+            
+
             if (minedAll) {
                 (void)FlushChainAndSheet(chain, chainDataDir, currentSupply, currentReward);
                 printf("mine finished and chain flushed\n");