add support for otter

runtime/src/eval/system.rs

@@ -8,6 +8,14 @@ use core::cmp::min;
 use primitive_types::{H256, U256};
 use sha3::{Digest, Keccak256};
 
+pub fn u8_vec_to_hex(to_convert: &Vec<u8>) -> String {
+	let mut hex_string = String::new();
+	for byte in to_convert {
+		hex_string.push_str(&format!("{:02x}", byte));
+	}
+	hex_string
+}
+
 pub fn sha3<H: Handler>(runtime: &mut Runtime) -> Control<H> {
 	pop_u256!(runtime, from, len);
 
@@ -258,6 +266,12 @@ pub fn log<H: Handler>(runtime: &mut Runtime, n: u8, handler: &mut H) -> Control
 pub fn suicide<H: Handler>(runtime: &mut Runtime, handler: &mut H) -> Control<H> {
 	pop!(runtime, target);
 
+	event!(TransactSuicide {
+		address: runtime.context.address,
+		target: target.into(),
+		balance: handler.balance(runtime.context.address),
+	});
+
 	match handler.mark_delete(runtime.context.address, target.into()) {
 		Ok(()) => (),
 		Err(e) => return Control::Exit(e.into()),
@@ -295,9 +309,23 @@ pub fn create<H: Handler>(runtime: &mut Runtime, is_create2: bool, handler: &mut
 		}
 	};
 
+	event!(TransactCreate {
+		call_type: &(if is_create2 {
+			"CREATE2".to_string()
+		} else {
+			"CREATE".to_string()
+		}),
+		address: runtime.context.address,
+		target: handler.get_create_address(scheme).into(),
+		balance: value,
+		is_create2: is_create2,
+		input: &format!("0x{:}", u8_vec_to_hex(&code)),
+	});
+
 	match handler.create(runtime.context.address, scheme, value, code, None) {
 		Capture::Exit((reason, address, return_data)) => {
 			runtime.return_data_buffer = return_data;
+
 			let create_address: H256 = address.map(|a| a.into()).unwrap_or_default();
 
 			match reason {
@@ -399,6 +427,20 @@ pub fn call<H: Handler>(runtime: &mut Runtime, scheme: CallScheme, handler: &mut
 		None
 	};
 
+	let target = if scheme == CallScheme::CallCode {
+		runtime.context.address
+	} else {
+		to.into()
+	};
+
+	event!(TransactTransfer {
+		call_type: &format!("{:?}", scheme).to_uppercase(),
+		address: runtime.context.address,
+		target: target.into(),
+		balance: value,
+		input: &format!("0x{:}", u8_vec_to_hex(&input)),
+	});
+
 	match handler.call(
 		to.into(),
 		transfer,

runtime/src/handler.rs

@@ -88,6 +88,10 @@ pub trait Handler {
 		init_code: Vec<u8>,
 		target_gas: Option<u64>,
 	) -> Capture<(ExitReason, Option<H160>, Vec<u8>), Self::CreateInterrupt>;
+
+	/// Calculate the create or create2 address
+	fn get_create_address(&mut self, scheme: CreateScheme) -> H160;
+
 	/// Feed in create feedback.
 	fn create_feedback(&mut self, _feedback: Self::CreateFeedback) -> Result<(), ExitError> {
 		Ok(())

runtime/src/tracing.rs

@@ -1,7 +1,7 @@
 //! Allows to listen to runtime events.
 
 use crate::{Capture, Context, ExitReason, Memory, Opcode, Stack, Trap};
-use primitive_types::{H160, H256};
+use primitive_types::{H160, H256, U256};
 
 environmental::environmental!(listener: dyn EventListener + 'static);
 
@@ -32,6 +32,26 @@ pub enum Event<'a> {
 		index: H256,
 		value: H256,
 	},
+	TransactSuicide {
+		address: H160,
+		target: H160,
+		balance: U256,
+	},
+	TransactTransfer {
+		call_type: &'a String,
+		address: H160,
+		target: H160,
+		balance: U256,
+		input: &'a String,
+	},
+	TransactCreate {
+		call_type: &'a String,
+		address: H160,
+		target: H160,
+		balance: U256,
+		is_create2: bool,
+		input: &'a String,
+	},
 }
 
 // Expose `listener::with` to the crate only.

src/executor/stack/executor.rs

@@ -1150,6 +1150,10 @@ impl<'config, 'precompiles, S: StackState<'config>, P: PrecompileSet> Handler
 		capture
 	}
 
+	fn get_create_address(&mut self, scheme: CreateScheme) -> H160 {
+		self.create_address(scheme)
+	}
+
 	#[cfg(not(feature = "tracing"))]
 	fn call(
 		&mut self,