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

src/numgen.c

@@ -0,0 +1,41 @@
+#include <numgen.h>
+
+unsigned char random_byte(void) {
+    return (unsigned char)(rand() % 256);
+}
+
+uint16_t random_two_byte(void) {
+    uint16_t x;
+    unsigned char bytes[2];
+    for (unsigned char i = 0; i < 2; i++) {
+        bytes[i] = random_byte();
+    }
+
+    memcpy(&x, bytes, sizeof(x));
+
+    return x;
+}
+
+uint32_t random_four_byte(void) {
+    uint32_t x;
+    unsigned char bytes[4];
+    for (unsigned char i = 0; i < 4; i++) {
+        bytes[i] = random_byte();
+    }
+
+    memcpy(&x, bytes, sizeof(x));
+
+    return x;
+}
+
+uint64_t random_eight_byte(void) {
+    uint64_t x;
+    unsigned char bytes[8];
+    for (unsigned char i = 0; i < 8; i++) {
+        bytes[i] = random_byte();
+    }
+
+    memcpy(&x, bytes, sizeof(x));
+
+    return x;
+}