Capture traces and write some tests.

ethcore/src/executed.rs

@@ -29,7 +29,7 @@ use std::fmt;
 
 /// Transaction execution receipt.
 #[derive(Debug, PartialEq, Clone)]
-pub struct Executed {
+pub struct Executed<T = FlatTrace, V = VMTrace> {
 	/// True if the outer call/create resulted in an exceptional exit.
 	pub exception: Option<vm::Error>,
 
@@ -63,9 +63,9 @@ pub struct Executed {
 	/// Transaction output.
 	pub output: Bytes,
 	/// The trace of this transaction.
-	pub trace: Vec<FlatTrace>,
+	pub trace: Vec<T>,
 	/// The VM trace of this transaction.
-	pub vm_trace: Option<VMTrace>,
+	pub vm_trace: Option<V>,
 	/// The state diff, if we traced it.
 	pub state_diff: Option<StateDiff>,
 }