feat: burn base fee when eip-1559 is enabled (>= london fork) (#289)

jsontests/src/run.rs

@@ -121,8 +121,8 @@ pub fn run_test(
 		block_difficulty: test.env.current_difficulty,
 		block_randomness: Some(test.env.current_random),
 		block_gas_limit: test.env.current_gas_limit,
-		block_base_fee_per_gas: U256::zero(), // TODO: fill in this field.
-		chain_id: U256::zero(),               // TODO: fill in this field.
+		block_base_fee_per_gas: test.transaction.gas_price,
+		chain_id: U256::zero(), // TODO: fill in this field.
 	};
 
 	let state = test

jsontests/src/types.rs

@@ -94,7 +94,11 @@ impl TestMulti {
 					transaction: TestTransaction {
 						data: self.transaction.data[post_state.indexes.data].0.clone(),
 						gas_limit: self.transaction.gas_limit[post_state.indexes.gas],
-						gas_price: self.transaction.gas_price.unwrap_or(U256::zero()),
+						gas_price: self
+							.transaction
+							.gas_price
+							.unwrap_or(self.env.current_base_fee),
+						gas_priority_fee: self.transaction.max_priority_fee_per_gas,
 						nonce: self.transaction.nonce,
 						secret_key: self.transaction.secret_key,
 						sender: self.transaction.sender,
@@ -236,6 +240,7 @@ pub struct TestTransaction {
 	pub data: Vec<u8>,
 	pub gas_limit: U256,
 	pub gas_price: U256,
+	pub gas_priority_fee: Option<U256>,
 	pub nonce: U256,
 	pub secret_key: H256,
 	pub sender: H160,

src/standard/config.rs

@@ -101,6 +101,8 @@ pub struct Config {
 	pub eip_1153_enabled: bool,
 	/// Enables MCOPY instruction. See [EIP-5656](https://github.com/ethereum/EIPs/blob/master/EIPS/eip-5656.md)
 	pub eip_5656_enabled: bool,
+	/// Uses EIP-1559 (Base fee is burned when this flag is enabled) [EIP-1559](https://github.com/ethereum/EIPs/blob/master/EIPS/eip-1559.md)
+	pub eip_1559_enabled: bool,
 }
 
 impl Config {
@@ -156,6 +158,7 @@ impl Config {
 			has_push0: false,
 			eip_1153_enabled: false,
 			eip_5656_enabled: false,
+			eip_1559_enabled: false,
 		}
 	}
 
@@ -211,6 +214,7 @@ impl Config {
 			has_push0: false,
 			eip_1153_enabled: false,
 			eip_5656_enabled: false,
+			eip_1559_enabled: false,
 		}
 	}
 
@@ -247,6 +251,7 @@ impl Config {
 			max_initcode_size,
 			eip_1153_enabled,
 			eip_5656_enabled,
+			eip_1559_enabled,
 		} = inputs;
 
 		// See https://eips.ethereum.org/EIPS/eip-2929
@@ -311,6 +316,7 @@ impl Config {
 			has_push0,
 			eip_1153_enabled,
 			eip_5656_enabled,
+			eip_1559_enabled,
 		}
 	}
 }
@@ -329,6 +335,7 @@ struct DerivedConfigInputs {
 	max_initcode_size: Option<usize>,
 	eip_1153_enabled: bool,
 	eip_5656_enabled: bool,
+	eip_1559_enabled: bool,
 }
 
 impl DerivedConfigInputs {
@@ -345,6 +352,7 @@ impl DerivedConfigInputs {
 			max_initcode_size: None,
 			eip_1153_enabled: false,
 			eip_5656_enabled: false,
+			eip_1559_enabled: false,
 		}
 	}
 
@@ -361,6 +369,7 @@ impl DerivedConfigInputs {
 			max_initcode_size: None,
 			eip_1153_enabled: false,
 			eip_5656_enabled: false,
+			eip_1559_enabled: true,
 		}
 	}
 
@@ -377,6 +386,7 @@ impl DerivedConfigInputs {
 			max_initcode_size: None,
 			eip_1153_enabled: false,
 			eip_5656_enabled: false,
+			eip_1559_enabled: true,
 		}
 	}
 
@@ -394,6 +404,7 @@ impl DerivedConfigInputs {
 			max_initcode_size: Some(0xC000),
 			eip_1153_enabled: false,
 			eip_5656_enabled: false,
+			eip_1559_enabled: true,
 		}
 	}
 }

src/standard/invoker/mod.rs

@@ -76,7 +76,7 @@ pub enum TransactValue {
 /// The invoke used in a top-layer transaction stack.
 pub struct TransactInvoke {
 	pub create_address: Option<H160>,
-	pub gas_fee: U256,
+	pub gas_limit: U256,
 	pub gas_price: U256,
 	pub caller: H160,
 }
@@ -241,7 +241,7 @@ where
 		let value = args.value();
 
 		let invoke = TransactInvoke {
-			gas_fee,
+			gas_limit: args.gas_limit(),
 			gas_price: args.gas_price(),
 			caller: args.caller(),
 			create_address: match &args {
@@ -398,8 +398,6 @@ where
 			Ok(_) | Err(ExitError::Reverted) => left_gas,
 			Err(_) => U256::zero(),
 		};
-		let refunded_fee = refunded_gas.saturating_mul(invoke.gas_price);
-		let coinbase_reward = invoke.gas_fee.saturating_sub(refunded_fee);
 
 		match &result {
 			Ok(_) => {
@@ -410,7 +408,22 @@ where
 			}
 		}
 
+		let refunded_fee = refunded_gas.saturating_mul(invoke.gas_price);
 		handler.deposit(invoke.caller, refunded_fee);
+		// Reward coinbase address
+		// EIP-1559 updated the fee system so that miners only get to keep the priority fee.
+		// The base fee is always burned.
+		let coinbase_gas_price = if substate.config().eip_1559_enabled {
+			invoke
+				.gas_price
+				.saturating_sub(handler.block_base_fee_per_gas())
+		} else {
+			invoke.gas_price
+		};
+		let coinbase_reward = invoke
+			.gas_limit
+			.saturating_mul(coinbase_gas_price)
+			.saturating_sub(refunded_fee);
 		handler.deposit(handler.block_coinbase(), coinbase_reward);
 
 		result