reorgs, fetch batching (parallel fetch), orphans

src/nets/fetch_scheduler.c

@@ -0,0 +1,24 @@
+#include <nets/fetch_scheduler.h>
+#include <constants.h>
+#include <math.h>
+
+// Note: floating point is used intentionally here for readability and
+// because the final penalty is rounded to whole blocks. This keeps the
+// implementation straightforward while avoiding subtle integer overflow
+// for large exponents. If desired, replace with fixed-point arithmetic.
+uint64_t FetchScheduler_ComputeReorgPenaltyBlocks(uint64_t delayBlocks) {
+    if (delayBlocks <= REORG_PENALTY_GRACE_BLOCKS) {
+        return 0ULL;
+    }
+
+    double B = (double)delayBlocks;
+    double factor = REORG_PENALTY_FACTOR;
+    double exp = REORG_PENALTY_EXPONENT;
+    double timeScale = ((double)TARGET_BLOCK_TIME) / REORG_PENALTY_REF_BLOCK_TIME;
+
+    double raw = factor * pow(B, exp) * timeScale;
+    if (raw < 0.0) raw = 0.0;
+
+    uint64_t penalty = (uint64_t)ceil(raw);
+    return penalty;
+}