Copied TCP impl from other project, basic Block implementation, randomx pow, signing via secp256k1

include/balance_sheet.h

@@ -0,0 +1,11 @@
+#ifndef BALANCE_SHEET_H
+#define BALANCE_SHEET_H
+
+#include <stdint.h>
+
+typedef struct {
+    uint8_t address[32]; // For now just the SHA-256 of the public key; allows representation in different encodings (base58, bech32, etc) without changing the underlying data structure
+    uint64_t balance;
+} balance_sheet_entry_t;
+
+#endif