test: add missing unit test for op calc_next_block_base_fee

crates/eips/src/eip1559/basefee.rs

@@ -1,6 +1,13 @@
 use crate::{
     calc_next_block_base_fee,
-    eip1559::constants::{DEFAULT_BASE_FEE_MAX_CHANGE_DENOMINATOR, DEFAULT_ELASTICITY_MULTIPLIER},
+    eip1559::constants::{
+        BASE_SEPOLIA_EIP1559_DEFAULT_ELASTICITY_MULTIPLIER,
+        DEFAULT_BASE_FEE_MAX_CHANGE_DENOMINATOR, DEFAULT_ELASTICITY_MULTIPLIER,
+        OP_MAINNET_EIP1559_DEFAULT_BASE_FEE_MAX_CHANGE_DENOMINATOR,
+        OP_MAINNET_EIP1559_DEFAULT_ELASTICITY_MULTIPLIER,
+        OP_SEPOLIA_EIP1559_DEFAULT_BASE_FEE_MAX_CHANGE_DENOMINATOR,
+        OP_SEPOLIA_EIP1559_DEFAULT_ELASTICITY_MULTIPLIER,
+    },
 };
 
 /// BaseFeeParams contains the config parameters that control block base fee computation
@@ -29,6 +36,30 @@ impl BaseFeeParams {
         }
     }
 
+    /// Get the base fee parameters for Optimism Mainnet
+    pub const fn optimism() -> Self {
+        Self {
+            max_change_denominator: OP_MAINNET_EIP1559_DEFAULT_BASE_FEE_MAX_CHANGE_DENOMINATOR,
+            elasticity_multiplier: OP_MAINNET_EIP1559_DEFAULT_ELASTICITY_MULTIPLIER,
+        }
+    }
+
+    /// Get the base fee parameters for Optimism Sepolia
+    pub const fn optimism_sepolia() -> Self {
+        Self {
+            max_change_denominator: OP_SEPOLIA_EIP1559_DEFAULT_BASE_FEE_MAX_CHANGE_DENOMINATOR,
+            elasticity_multiplier: OP_SEPOLIA_EIP1559_DEFAULT_ELASTICITY_MULTIPLIER,
+        }
+    }
+
+    /// Get the base fee parameters for Base Sepolia
+    pub const fn base_sepolia() -> Self {
+        Self {
+            max_change_denominator: OP_SEPOLIA_EIP1559_DEFAULT_BASE_FEE_MAX_CHANGE_DENOMINATOR,
+            elasticity_multiplier: BASE_SEPOLIA_EIP1559_DEFAULT_ELASTICITY_MULTIPLIER,
+        }
+    }
+
     /// Calculate the base fee for the next block based on the EIP-1559 specification.
     ///
     /// See also [calc_next_block_base_fee]

crates/eips/src/eip1559/constants.rs

@@ -25,3 +25,23 @@ pub const DEFAULT_BASE_FEE_MAX_CHANGE_DENOMINATOR: u64 = 8;
 
 /// Elasticity multiplier as defined in [EIP-1559](https://eips.ethereum.org/EIPS/eip-1559)
 pub const DEFAULT_ELASTICITY_MULTIPLIER: u64 = 2;
+
+/// Base fee max change denominator for Optimism Sepolia as defined in the Optimism
+/// [transaction costs](https://community.optimism.io/docs/developers/build/differences/#transaction-costs) doc.
+pub(crate) const OP_SEPOLIA_EIP1559_DEFAULT_BASE_FEE_MAX_CHANGE_DENOMINATOR: u128 = 50;
+
+/// Base fee max change denominator for Optimism Sepolia as defined in the Optimism
+/// [transaction costs](https://community.optimism.io/docs/developers/build/differences/#transaction-costs) doc.
+pub(crate) const OP_SEPOLIA_EIP1559_DEFAULT_ELASTICITY_MULTIPLIER: u128 = 6;
+
+/// Base fee max change denominator for Optimism Mainnet as defined in the Optimism
+/// [transaction costs](https://community.optimism.io/docs/developers/build/differences/#transaction-costs) doc.
+pub(crate) const OP_MAINNET_EIP1559_DEFAULT_BASE_FEE_MAX_CHANGE_DENOMINATOR: u128 = 50;
+
+/// Base fee max change denominator for Optimism Mainnet as defined in the Optimism
+/// [transaction costs](https://community.optimism.io/docs/developers/build/differences/#transaction-costs) doc.
+pub(crate) const OP_MAINNET_EIP1559_DEFAULT_ELASTICITY_MULTIPLIER: u128 = 6;
+
+/// Base fee max change denominator for Base Sepolia as defined in the Optimism
+/// [transaction costs](https://community.optimism.io/docs/developers/build/differences/#transaction-costs) doc.
+pub(crate) const BASE_SEPOLIA_EIP1559_DEFAULT_ELASTICITY_MULTIPLIER: u128 = 10;

crates/eips/src/eip1559/helpers.rs

@@ -101,4 +101,100 @@ mod tests {
             );
         }
     }
+
+    #[test]
+    fn calculate_optimism_sepolia_base_fee_success() {
+        let base_fee = [
+            1000000000, 1000000000, 1000000000, 1072671875, 1059263476, 1049238967, 1049238967, 0,
+            1, 2,
+        ];
+        let gas_used = [
+            10000000, 10000000, 10000000, 9000000, 10001000, 0, 10000000, 10000000, 10000000,
+            10000000,
+        ];
+        let gas_limit = [
+            10000000, 12000000, 14000000, 10000000, 14000000, 2000000, 18000000, 18000000,
+            18000000, 18000000,
+        ];
+        let next_base_fee = [
+            1100000048, 1080000000, 1065714297, 1167067046, 1128881311, 1028254188, 1098203452, 1,
+            2, 3,
+        ];
+
+        for i in 0..base_fee.len() {
+            assert_eq!(
+                next_base_fee[i],
+                calc_next_block_base_fee(
+                    gas_used[i] as u128,
+                    gas_limit[i] as u128,
+                    base_fee[i] as u128,
+                    BaseFeeParams::optimism_sepolia(),
+                ) as u64
+            );
+        }
+    }
+
+    #[test]
+    fn calculate_optimism_base_fee_success() {
+        let base_fee = [
+            1000000000, 1000000000, 1000000000, 1072671875, 1059263476, 1049238967, 1049238967, 0,
+            1, 2,
+        ];
+        let gas_used = [
+            10000000, 10000000, 10000000, 9000000, 10001000, 0, 10000000, 10000000, 10000000,
+            10000000,
+        ];
+        let gas_limit = [
+            10000000, 12000000, 14000000, 10000000, 14000000, 2000000, 18000000, 18000000,
+            18000000, 18000000,
+        ];
+        let next_base_fee = [
+            1100000048, 1080000000, 1065714297, 1167067046, 1128881311, 1028254188, 1098203452, 1,
+            2, 3,
+        ];
+
+        for i in 0..base_fee.len() {
+            assert_eq!(
+                next_base_fee[i],
+                calc_next_block_base_fee(
+                    gas_used[i] as u128,
+                    gas_limit[i] as u128,
+                    base_fee[i] as u128,
+                    BaseFeeParams::optimism(),
+                ) as u64
+            );
+        }
+    }
+
+    #[test]
+    fn calculate_base_sepolia_base_fee_success() {
+        let base_fee = [
+            1000000000, 1000000000, 1000000000, 1072671875, 1059263476, 1049238967, 1049238967, 0,
+            1, 2,
+        ];
+        let gas_used = [
+            10000000, 10000000, 10000000, 9000000, 10001000, 0, 10000000, 10000000, 10000000,
+            10000000,
+        ];
+        let gas_limit = [
+            10000000, 12000000, 14000000, 10000000, 14000000, 2000000, 18000000, 18000000,
+            18000000, 18000000,
+        ];
+        let next_base_fee = [
+            1180000000, 1146666666, 1122857142, 1244299375, 1189416692, 1028254188, 1144836295, 1,
+            2, 3,
+        ];
+
+        for i in 0..base_fee.len() {
+            assert_eq!(
+                next_base_fee[i],
+                calc_next_block_base_fee(
+                    gas_used[i] as u128,
+                    gas_limit[i] as u128,
+                    base_fee[i] as u128,
+                    BaseFeeParams::base_sepolia(),
+                ) as u64
+            );
+        }
+    }
 }