add post_dispatch (#3229)

* add post_dispatch

* Update traits.rs

* Update checked_extrinsic.rs

* Update traits.rs

* Update traits.rs

* fix build issue

* update runtime version

* fix test build issue

substrate/core/sr-primitives/src/generic/checked_extrinsic.rs

@@ -77,14 +77,16 @@ where
 		info: DispatchInfo,
 		len: usize,
 	) -> Result<DispatchResult, DispatchError> {
-		let maybe_who = if let Some((id, extra)) = self.signed {
-			Extra::pre_dispatch(extra, &id, &self.function, info, len)?;
-			Some(id)
+		let (maybe_who, pre) = if let Some((id, extra)) = self.signed {
+			let pre = Extra::pre_dispatch(extra, &id, &self.function, info, len)?;
+			(Some(id), pre)
 		} else {
-			Extra::pre_dispatch_unsigned(&self.function, info, len)?;
-			None
+			let pre = Extra::pre_dispatch_unsigned(&self.function, info, len)?;
+			(None, pre)
 		};
-		Ok(self.function.dispatch(Origin::from(maybe_who)))
+		let res = self.function.dispatch(Origin::from(maybe_who));
+		Extra::post_dispatch(pre, info, len);
+		Ok(res)
 	}
 }
 

substrate/core/sr-primitives/src/generic/unchecked_extrinsic.rs

@@ -236,6 +236,8 @@ mod tests {
 		type AccountId = u64;
 		type Call = ();
 		type AdditionalSigned = ();
+		type Pre = ();
+
 		fn additional_signed(&self) -> rstd::result::Result<(), &'static str> { Ok(()) }
 	}