diff --git a/src/compute_engines/yield_curve/yield_curve.cairo b/src/compute_engines/yield_curve/yield_curve.cairo
index fcf8b444..e448e3b9 100644
--- a/src/compute_engines/yield_curve/yield_curve.cairo
+++ b/src/compute_engines/yield_curve/yield_curve.cairo
@@ -569,7 +569,7 @@ mod YieldCurve {
                 continue;
             } else {
                 let shifted_on_value = change_decimals(
-                    self, output.price, output.decimals, output_decimals
+                    output.price, output.decimals, output_decimals
                 );
                 yield_points
                     .append(
@@ -848,9 +848,7 @@ mod YieldCurve {
     }
 
 
-    fn change_decimals(
-        self: @ContractState, value: u128, old_decimals: u32, new_decimals: u32
-    ) -> u128 {
+    fn change_decimals(value: u128, old_decimals: u32, new_decimals: u32) -> u128 {
         if (old_decimals <= new_decimals) {
             // Multiply on_entry by 10 ^ (new_decimals - old_decimals)
             // which is guaranteed to be an integer > 0 by the if statement
diff --git a/src/randomness/randomness.cairo b/src/randomness/randomness.cairo
index 5162785b..d537473a 100644
--- a/src/randomness/randomness.cairo
+++ b/src/randomness/randomness.cairo
@@ -45,7 +45,6 @@ trait IRandomness<TContractState> {
         callback_address: ContractAddress,
         callback_gas_limit: u64,
         random_words: Span<felt252>,
-        block_hash: felt252,
         proof: Span<felt252>,
     );
     fn get_pending_requests(
@@ -226,7 +225,6 @@ mod Randomness {
             callback_address: ContractAddress,
             callback_gas_limit: u64,
             random_words: Span<felt252>,
-            block_hash: felt252,
             proof: Span<felt252>,
         ) {
             assert_only_admin();
diff --git a/src/tests/test_randomness.cairo b/src/tests/test_randomness.cairo
index f275a8ac..9ff7cdbe 100644
--- a/src/tests/test_randomness.cairo
+++ b/src/tests/test_randomness.cairo
@@ -115,7 +115,6 @@ fn test_randomness() {
             callback_address,
             callback_gas_limit,
             random_words.span(),
-            block_hash,
             proof.span()
         );
     let res = example_randomness.get_last_random();