BigInts, save/load, will make a calculation for block rewards soon

include/constants.h

@@ -0,0 +1,37 @@
+#ifndef CONSTANTS_H
+#define CONSTANTS_H
+
+#include <stdint.h>
+#include <uint256.h>
+#include <stdbool.h>
+
+#define DECIMALS 1000000000000ULL
+#define EMISSION_SPEED_FACTOR 20
+const uint64_t M_CAP = 18446744073709551615ULL; // Max uint64
+const uint64_t TAIL_EMISSION = (uint64_t)(1.0 * DECIMALS); // Emission floor is 1.0 coins per block
+// No max supply. Instead of halving, it'll follow a more gradual, Monero-like emission curve.
+
+static inline uint64_t CalculateBlockReward(uint256_t currentSupply, uint64_t height) {
+    // Inclusive of block 0
+
+    if (current_supply.limbs[1] > 0 || 
+        current_supply.limbs[2] > 0 || 
+        current_supply.limbs[3] > 0 || 
+        current_supply.limbs[0] >= M_CAP) {
+        return TAIL_EMISSION;
+    }
+
+    uint64_t supply_64 = current_supply.limbs[0];
+    
+    // Formula: (M - Supply) >> 2^k - lifted from Monero's codebase (thanks guys!)
+    uint64_t reward = (M_CAP - supply_64) >> EMISSION_SPEED_FACTOR;
+
+    // Check if the calculated reward has fallen below the floor
+    if (reward < TAIL_EMISSION) {
+        return TAIL_EMISSION;
+    }
+
+    return reward;
+}
+
+#endif