From d6ddbc8bb5086f471b81c3defa3fd99f9c3a6924 Mon Sep 17 00:00:00 2001
From: arkpar <arkady.paronyan@gmail.com>
Date: Fri, 17 Aug 2018 14:06:10 +0200
Subject: [PATCH] Paranoid mode

---
 polkadot/Cargo.lock      |  1 +
 polkadot/api/Cargo.toml  |  1 +
 polkadot/api/src/full.rs | 13 ++++++++++---
 polkadot/api/src/lib.rs  |  3 +++
 4 files changed, 15 insertions(+), 3 deletions(-)

diff --git a/polkadot/Cargo.lock b/polkadot/Cargo.lock
index ef63b511a3..ae69c6e059 100644
--- a/polkadot/Cargo.lock
+++ b/polkadot/Cargo.lock
@@ -1705,6 +1705,7 @@ name = "polkadot-api"
 version = "0.1.0"
 dependencies = [
  "error-chain 0.12.0 (registry+https://github.com/rust-lang/crates.io-index)",
+ "log 0.3.9 (registry+https://github.com/rust-lang/crates.io-index)",
  "polkadot-executor 0.1.0",
  "polkadot-primitives 0.1.0",
  "polkadot-runtime 0.1.0",
diff --git a/polkadot/api/Cargo.toml b/polkadot/api/Cargo.toml
index 019b2339ac..92d8ca81b8 100644
--- a/polkadot/api/Cargo.toml
+++ b/polkadot/api/Cargo.toml
@@ -5,6 +5,7 @@ authors = ["Parity Technologies <admin@parity.io>"]
 
 [dependencies]
 error-chain = "0.12"
+log = "0.3"
 polkadot-executor = { path = "../executor" }
 polkadot-runtime = { path = "../runtime" }
 polkadot-primitives = { path = "../primitives" }
diff --git a/polkadot/api/src/full.rs b/polkadot/api/src/full.rs
index 66cee7d720..e0568f9394 100644
--- a/polkadot/api/src/full.rs
+++ b/polkadot/api/src/full.rs
@@ -22,7 +22,7 @@ use client::{self, Client, LocalCallExecutor, CallExecutor};
 use codec::{Encode, Decode};
 use polkadot_executor::Executor as LocalDispatch;
 use substrate_executor::NativeExecutor;
-use state_machine;
+use state_machine::ExecutionManager;
 
 use runtime::Address;
 use primitives::{
@@ -50,19 +50,26 @@ where
 	};
 	client.state_at(&parent).map_err(Error::from).and_then(|state| {
 		let mut overlay = Default::default();
+		let execution_manager = || ExecutionManager::Both(|wasm_result, native_result| {
+			warn!("Consensus error between wasm and native runtime execution at block {:?}", at);
+			warn!("   Method {:?}", method);
+			warn!("   Native result {:?}", native_result);
+			warn!("   Wasm result {:?}", wasm_result);
+			wasm_result
+		});
 		client.executor().call_at_state(
 			&state,
 			&mut overlay,
 			"initialise_block",
 			&header.encode(),
-			state_machine::native_when_possible()
+			execution_manager()
 		)?;
 		let (r, _) = client.executor().call_at_state(
 			&state,
 			&mut overlay,
 			method,
 			input,
-			state_machine::native_when_possible()
+			execution_manager()
 		)?;
 		Ok(R::decode(&mut &r[..])
 		   .ok_or_else(|| client::error::Error::from(client::error::ErrorKind::CallResultDecode(method)))?)
diff --git a/polkadot/api/src/lib.rs b/polkadot/api/src/lib.rs
index 8c1e4b1de8..1265faf961 100644
--- a/polkadot/api/src/lib.rs
+++ b/polkadot/api/src/lib.rs
@@ -32,6 +32,9 @@ extern crate substrate_state_machine as state_machine;
 #[macro_use]
 extern crate error_chain;
 
+#[macro_use]
+extern crate log;
+
 #[cfg(test)]
 extern crate substrate_keyring as keyring;