diff --git a/Stellar-contract-config-setting.x b/Stellar-contract-config-setting.x
index d69be6c..9a95937 100644
--- a/Stellar-contract-config-setting.x
+++ b/Stellar-contract-config-setting.x
@@ -281,7 +281,17 @@ enum ContractCostType {
     // Cost of performing BN254 pairing operation
     Bn254Pairing = 78,
     // Cost of converting a BN254 scalar element from U256
-    Bn254FrFromU256 = 79
+    Bn254FrFromU256 = 79,
+    // Cost of converting a BN254 scalar element to U256
+    Bn254FrToU256 = 80,
+    // // Cost of performing BN254 scalar element addition/subtraction
+    Bn254FrAddSub = 81,
+    // Cost of performing BN254 scalar element multiplication
+    Bn254FrMul = 82,
+    // Cost of performing BN254 scalar element exponentiation
+    Bn254FrPow = 83,
+     // Cost of performing BN254 scalar element inversion
+    Bn254FrInv = 84
 };
 
 struct ContractCostParamEntry {