From a5ca085d6ef6bcd34761d9c33d19ad37be9aa2dc Mon Sep 17 00:00:00 2001
From: FiveMovesAhead <ying@tig.foundation>
Date: Thu, 9 Oct 2025 11:53:01 +0100
Subject: [PATCH] Move gamma magic numbers to config.

---
 tig-protocol/src/contracts/rewards.rs | 6 ++++--
 tig-structs/src/config.rs             | 8 ++++++++
 2 files changed, 12 insertions(+), 2 deletions(-)

diff --git a/tig-protocol/src/contracts/rewards.rs b/tig-protocol/src/contracts/rewards.rs
index 72e70338..8eb353de 100644
--- a/tig-protocol/src/contracts/rewards.rs
+++ b/tig-protocol/src/contracts/rewards.rs
@@ -26,8 +26,10 @@ pub(crate) async fn update(cache: &mut AddBlockCache) {
     let active_challenge_ids = &block_data.active_ids[&ActiveType::Challenge];
 
     let zero = PreciseNumber::from(0);
-    block_details.gamma_value =
-        1.0258 * (1.0 - 0.8730 * (-0.0354 * active_challenge_ids.len() as f64).exp());
+    block_details.gamma_value = config.rewards.gamma.a
+        * (1.0
+            - config.rewards.gamma.b
+                * (-config.rewards.gamma.c * active_challenge_ids.len() as f64).exp());
     let block_reward = PreciseNumber::from_f64(
         config
             .rewards
diff --git a/tig-structs/src/config.rs b/tig-structs/src/config.rs
index 2974c8fd..6aba62ef 100644
--- a/tig-structs/src/config.rs
+++ b/tig-structs/src/config.rs
@@ -120,10 +120,18 @@ serializable_struct_with_getters! {
 }
 serializable_struct_with_getters! {
     RewardsConfig {
+        gamma: GammaConfig,
         distribution: DistributionConfig,
         schedule: Vec<EmissionsConfig>,
     }
 }
+serializable_struct_with_getters! {
+    GammaConfig {
+        a: f64,
+        b: f64,
+        c: f64,
+    }
+}
 serializable_struct_with_getters! {
     DistributionConfig {
         opow: f64,