[beta] Byzantium updates (#6529)

* fix modexp bug: return 0 if base=0 (#6424) * Running state test using parity-evm (#6355) * Initial version of state tests. * Refactor state to support tracing. * Unify TransactResult. * Add test. * Byzantium updates
2017-09-16 12:21:35 +02:00
parent d8bf5fc848
commit bb311e838b
57 changed files with 1403 additions and 762 deletions
--- a/ethcore/src/blockchain/blockchain.rs
+++ b/ethcore/src/blockchain/blockchain.rs
@@ -2039,6 +2039,7 @@ mod tests {
 		let bc = new_chain(&genesis, db.clone());
 		insert_block(&db, &bc, &b1, vec![Receipt {
 			state_root: Some(H256::default()),
+			status_code: None,
 			gas_used: 10_000.into(),
 			log_bloom: Default::default(),
 			logs: vec![
@@ -2048,6 +2049,7 @@ mod tests {
 		},
 		Receipt {
 			state_root: Some(H256::default()),
+			status_code: None,
 			gas_used: 10_000.into(),
 			log_bloom: Default::default(),
 			logs: vec![
@@ -2057,6 +2059,7 @@ mod tests {
 		insert_block(&db, &bc, &b2, vec![
 			Receipt {
 				state_root: Some(H256::default()),
+				status_code: None,
 				gas_used: 10_000.into(),
 				log_bloom: Default::default(),
 				logs: vec![
--- a/ethcore/src/builtin.rs
+++ b/ethcore/src/builtin.rs
@@ -61,7 +61,7 @@ struct Linear {
 }

 /// A special pricing model for modular exponentiation.
-struct Modexp {
+struct ModexpPricer {
 	divisor: usize,
 }

@@ -71,7 +71,20 @@ impl Pricer for Linear {
 	}
 }

-impl Pricer for Modexp {
+/// A alt_bn128_parinig pricing model. This computes a price using a base cost and a cost per pair.
+struct AltBn128PairingPricer {
+	base: usize,
+	pair: usize,
+}
+
+impl Pricer for AltBn128PairingPricer {
+	fn cost(&self, input: &[u8]) -> U256 {
+		let cost = U256::from(self.base) + U256::from(self.pair) * U256::from(input.len() / 192);
+		cost
+	}
+}
+
+impl Pricer for ModexpPricer {
 	fn cost(&self, input: &[u8]) -> U256 {
 		let mut reader = input.chain(io::repeat(0));
 		let mut buf = [0; 32];
@@ -85,17 +98,49 @@ impl Pricer for Modexp {
 		let exp_len = read_len();
 		let mod_len = read_len();

-		// floor(max(length_of_MODULUS, length_of_BASE) ** 2 * max(length_of_EXPONENT, 1) / GQUADDIVISOR)
-		// TODO: is saturating the best behavior here?
+		let max_len = U256::from(u32::max_value() / 2);
+		if base_len > max_len || mod_len > max_len {
+			return U256::max_value();
+		}
+
+		let base_len = base_len.low_u64();
+		let exp_len = exp_len.low_u64();
+		let mod_len = mod_len.low_u64();
 		let m = max(mod_len, base_len);
-		match m.overflowing_mul(m) {
-			(_, true) => U256::max_value(),
-			(val, _) => {
-				match val.overflowing_mul(max(exp_len, U256::one())) {
-					(_, true) => U256::max_value(),
-					(val, _) => val / (self.divisor as u64).into()
-				}
-			}
+		if m == 0 {
+			return U256::zero();
+		}
+		// read fist 32-byte word of the exponent.
+		let exp_low = if base_len + 96 >= input.len() as u64 { U256::zero() } else {
+			let mut buf = [0; 32];
+			let mut reader = input[(96 + base_len as usize)..].chain(io::repeat(0));
+			let len = min(exp_len, 32) as usize;
+			reader.read_exact(&mut buf[(32 - len)..]).expect("reading from zero-extended memory cannot fail; qed");
+			U256::from(H256::from_slice(&buf[..]))
+		};
+
+		let adjusted_exp_len = Self::adjusted_exp_len(exp_len, exp_low);
+
+		(Self::mult_complexity(m) * max(adjusted_exp_len, 1) / self.divisor as u64).into()
+	}
+}
+
+impl ModexpPricer {
+	fn adjusted_exp_len(len: u64, exp_low: U256) -> u64 {
+		let bit_index = if exp_low.is_zero() { 0 } else { (255 - exp_low.leading_zeros()) as u64 };
+		if len <= 32 {
+			bit_index
+		}
+		else {
+			8 * (len - 32) + bit_index
+		}
+	}
+
+	fn mult_complexity(x: u64) -> u64 {
+		match x {
+			x if x <= 64 => x * x,
+			x if x <= 1024 => (x * x) / 4 + 96 * x - 3072,
+			x => (x * x) / 16 + 480 * x - 199680,
 		}
 	}
 }
@@ -135,7 +180,7 @@ impl From<ethjson::spec::Builtin> for Builtin {
 				})
 			}
 			ethjson::spec::Pricing::Modexp(exp) => {
-				Box::new(Modexp {
+				Box::new(ModexpPricer {
 					divisor: if exp.divisor == 0 {
 						warn!("Zero modexp divisor specified. Falling back to default.");
 						10
@@ -144,6 +189,12 @@ impl From<ethjson::spec::Builtin> for Builtin {
 					}
 				})
 			}
+			ethjson::spec::Pricing::AltBn128Pairing(pricer) => {
+				Box::new(AltBn128PairingPricer {
+					base: pricer.base,
+					pair: pricer.pair,
+				})
+			}
 		};

 		Builtin {
@@ -162,9 +213,9 @@ fn ethereum_builtin(name: &str) -> Box<Impl> {
 		"sha256" => Box::new(Sha256) as Box<Impl>,
 		"ripemd160" => Box::new(Ripemd160) as Box<Impl>,
 		"modexp" => Box::new(ModexpImpl) as Box<Impl>,
-		"bn128_add" => Box::new(Bn128AddImpl) as Box<Impl>,
-		"bn128_mul" => Box::new(Bn128MulImpl) as Box<Impl>,
-		"bn128_pairing" => Box::new(Bn128PairingImpl) as Box<Impl>,
+		"alt_bn128_add" => Box::new(Bn128AddImpl) as Box<Impl>,
+		"alt_bn128_mul" => Box::new(Bn128MulImpl) as Box<Impl>,
+		"alt_bn128_pairing" => Box::new(Bn128PairingImpl) as Box<Impl>,
 		_ => panic!("invalid builtin name: {}", name),
 	}
 }
@@ -266,6 +317,38 @@ impl Impl for Ripemd160 {
 	}
 }

+// calculate modexp: exponentiation by squaring. the `num` crate has pow, but not modular.
+fn modexp(mut base: BigUint, mut exp: BigUint, modulus: BigUint) -> BigUint {
+	use num::Integer;
+
+	if modulus <= BigUint::one() { // n^m % 0 || n^m % 1
+		return BigUint::zero();
+	}
+
+	if exp.is_zero() { // n^0 % m
+		return BigUint::one();
+	}
+
+	if base.is_zero() { // 0^n % m, n>0
+		return BigUint::zero();
+	}
+
+	let mut result = BigUint::one();
+	base = base % &modulus;
+
+	// fast path for base divisible by modulus.
+	if base.is_zero() { return BigUint::zero() }
+	while !exp.is_zero() {
+		if exp.is_odd() {
+			result = (result * &base) % &modulus;
+		}
+
+		exp = exp >> 1;
+		base = (base.clone() * base) % &modulus;
+	}
+	result
+}
+
 impl Impl for ModexpImpl {
 	fn execute(&self, input: &[u8], output: &mut BytesRef) -> Result<(), Error> {
 		let mut reader = input.chain(io::repeat(0));
@@ -283,47 +366,25 @@ impl Impl for ModexpImpl {
 		let exp_len = read_len(&mut reader);
 		let mod_len = read_len(&mut reader);

-		// read the numbers themselves.
-		let mut buf = vec![0; max(mod_len, max(base_len, exp_len))];
-		let mut read_num = |len| {
-			reader.read_exact(&mut buf[..len]).expect("reading from zero-extended memory cannot fail; qed");
-			BigUint::from_bytes_be(&buf[..len])
+		// Gas formula allows arbitrary large exp_len when base and modulus are empty, so we need to handle empty base first.
+		let r = if base_len == 0 && mod_len == 0 {
+			BigUint::zero()
+		} else {
+			// read the numbers themselves.
+			let mut buf = vec![0; max(mod_len, max(base_len, exp_len))];
+			let mut read_num = |len| {
+				reader.read_exact(&mut buf[..len]).expect("reading from zero-extended memory cannot fail; qed");
+				BigUint::from_bytes_be(&buf[..len])
+			};
+
+			let base = read_num(base_len);
+			let exp = read_num(exp_len);
+			let modulus = read_num(mod_len);
+			modexp(base, exp, modulus)
 		};

-		let base = read_num(base_len);
-		let exp = read_num(exp_len);
-		let modulus = read_num(mod_len);
-
-		// calculate modexp: exponentiation by squaring. the `num` crate has pow, but not modular.
-		fn modexp(mut base: BigUint, mut exp: BigUint, modulus: BigUint) -> BigUint {
-			use num::Integer;
-
-			match (base.is_zero(), exp.is_zero()) {
-				(_, true) => return BigUint::one(), // n^0 % m
-				(true, false) => return BigUint::zero(), // 0^n % m, n>0
-				(false, false) if modulus <= BigUint::one() => return BigUint::zero(), // a^b % 1 = 0.
-				_ => {}
-			}
-
-			let mut result = BigUint::one();
-			base = base % &modulus;
-
-			// fast path for base divisible by modulus.
-			if base.is_zero() { return result }
-			while !exp.is_zero() {
-				if exp.is_odd() {
-					result = (result * &base) % &modulus;
-				}
-
-				exp = exp >> 1;
-				base = (base.clone() * base) % &modulus;
-			}
-
-			result
-		}
-
 		// write output to given memory, left padded and same length as the modulus.
-		let bytes = modexp(base, exp, modulus).to_bytes_be();
+		let bytes = r.to_bytes_be();

 		// always true except in the case of zero-length modulus, which leads to
 		// output of length and value 1.
@@ -352,8 +413,8 @@ fn read_point(reader: &mut io::Chain<&[u8], io::Repeat>) -> Result<::bn::G1, Err
 	let px = Fq::from_slice(&buf[0..32]).map_err(|_| Error::from("Invalid point x coordinate"))?;

 	reader.read_exact(&mut buf[..]).expect("reading from zero-extended memory cannot fail; qed");
-	let py = Fq::from_slice(&buf[0..32]).map_err(|_| Error::from("Invalid point x coordinate"))?;

+	let py = Fq::from_slice(&buf[0..32]).map_err(|_| Error::from("Invalid point y coordinate"))?;
 	Ok(
 		if px == Fq::zero() && py == Fq::zero() {
 			G1::zero()
@@ -404,50 +465,29 @@ impl Impl for Bn128MulImpl {
 	}
 }

-mod bn128_gen {
-	use bn::{AffineG1, AffineG2, Fq, Fq2, G1, G2, Gt, pairing};
-
-	lazy_static! {
-		pub static ref P1: G1 = G1::from(AffineG1::new(
-			Fq::from_str("1").expect("1 is a valid field element"),
-			Fq::from_str("2").expect("2 is a valid field element"),
-		).expect("Generator P1(1, 2) is a valid curve point"));
-	}
-
-	lazy_static! {
-		pub static ref P2: G2 = G2::from(AffineG2::new(
-			Fq2::new(
-				Fq::from_str("10857046999023057135944570762232829481370756359578518086990519993285655852781")
-					.expect("a valid field element"),
-				Fq::from_str("11559732032986387107991004021392285783925812861821192530917403151452391805634")
-					.expect("a valid field element"),
-			),
-			Fq2::new(
-				Fq::from_str("8495653923123431417604973247489272438418190587263600148770280649306958101930")
-					.expect("a valid field element"),
-				Fq::from_str("4082367875863433681332203403145435568316851327593401208105741076214120093531")
-					.expect("a valid field element"),
-			),
-		).expect("the generator P2(10857046999023057135944570762232829481370756359578518086990519993285655852781 + 11559732032986387107991004021392285783925812861821192530917403151452391805634i, 8495653923123431417604973247489272438418190587263600148770280649306958101930 + 4082367875863433681332203403145435568316851327593401208105741076214120093531i) is a valid curve point"));
-	}
-
-	lazy_static! {
-		pub static ref P1_P2_PAIRING: Gt = pairing(P1.clone(), P2.clone());
-	}
-}
-
 impl Impl for Bn128PairingImpl {
 	/// Can fail if:
 	///     - input length is not a multiple of 192
 	///     - any of odd points does not belong to bn128 curve
 	///     - any of even points does not belong to the twisted bn128 curve over the field F_p^2 = F_p[i] / (i^2 + 1)
 	fn execute(&self, input: &[u8], output: &mut BytesRef) -> Result<(), Error> {
-		use bn::{AffineG1, AffineG2, Fq, Fq2, pairing, G1, G2, Gt};
-
-		let elements = input.len() / 192; // (a, b_a, b_b - each 64-byte affine coordinates)
 		if input.len() % 192 != 0 {
 			return Err("Invalid input length, must be multiple of 192 (3 * (32*2))".into())
 		}
+
+		if let Err(err) = self.execute_with_error(input, output) {
+			trace!("Pairining error: {:?}", err);
+			return Err(err)
+		}
+		Ok(())
+	}
+}
+
+impl Bn128PairingImpl {
+	fn execute_with_error(&self, input: &[u8], output: &mut BytesRef) -> Result<(), Error> {
+		use bn::{AffineG1, AffineG2, Fq, Fq2, pairing, G1, G2, Gt, Group};
+
+		let elements = input.len() / 192; // (a, b_a, b_b - each 64-byte affine coordinates)
 		let ret_val = if input.len() == 0 {
 			U256::one()
 		} else {
@@ -459,34 +499,36 @@ impl Impl for Bn128PairingImpl {
 				let a_y = Fq::from_slice(&input[idx*192+32..idx*192+64])
 					.map_err(|_| Error::from("Invalid a argument y coordinate"))?;

-				let b_b_x = Fq::from_slice(&input[idx*192+64..idx*192+96])
+				let b_a_y = Fq::from_slice(&input[idx*192+64..idx*192+96])
 					.map_err(|_| Error::from("Invalid b argument imaginary coeff x coordinate"))?;

-				let b_b_y = Fq::from_slice(&input[idx*192+96..idx*192+128])
+				let b_a_x = Fq::from_slice(&input[idx*192+96..idx*192+128])
 					.map_err(|_| Error::from("Invalid b argument imaginary coeff y coordinate"))?;

-				let b_a_x = Fq::from_slice(&input[idx*192+128..idx*192+160])
+				let b_b_y = Fq::from_slice(&input[idx*192+128..idx*192+160])
 					.map_err(|_| Error::from("Invalid b argument real coeff x coordinate"))?;

-				let b_a_y = Fq::from_slice(&input[idx*192+160..idx*192+192])
+				let b_b_x = Fq::from_slice(&input[idx*192+160..idx*192+192])
 					.map_err(|_| Error::from("Invalid b argument real coeff y coordinate"))?;

-				vals.push((
-					G1::from(
-						AffineG1::new(a_x, a_y).map_err(|_| Error::from("Invalid a argument - not on curve"))?
-					),
-					G2::from(
-						AffineG2::new(
-							Fq2::new(b_a_x, b_a_y),
-							Fq2::new(b_b_x, b_b_y),
-						).map_err(|_| Error::from("Invalid b argument - not on curve"))?
-					),
-				));
+				let b_a = Fq2::new(b_a_x, b_a_y);
+				let b_b = Fq2::new(b_b_x, b_b_y);
+				let b = if b_a.is_zero() && b_b.is_zero() {
+					G2::zero()
+				} else {
+					G2::from(AffineG2::new(b_a, b_b).map_err(|_| Error::from("Invalid b argument - not on curve"))?)
+				};
+				let a = if a_x.is_zero() && a_y.is_zero() {
+					G1::zero()
+				} else {
+					G1::from(AffineG1::new(a_x, a_y).map_err(|_| Error::from("Invalid a argument - not on curve"))?)
+				};
+				vals.push((a, b));
 			};

 			let mul = vals.into_iter().fold(Gt::one(), |s, (a, b)| s * pairing(a, b));

-			if mul == *bn128_gen::P1_P2_PAIRING {
+			if mul == Gt::one() {
 				U256::one()
 			} else {
 				U256::zero()
@@ -503,10 +545,44 @@ impl Impl for Bn128PairingImpl {

 #[cfg(test)]
 mod tests {
-	use super::{Builtin, Linear, ethereum_builtin, Pricer, Modexp};
+	use super::{Builtin, Linear, ethereum_builtin, Pricer, ModexpPricer, modexp as me};
 	use ethjson;
 	use util::{U256, BytesRef};
 	use rustc_hex::FromHex;
+	use num::{BigUint, Zero, One};
+
+	#[test]
+	fn modexp_func() {
+		// n^0 % m == 1
+		let mut base = BigUint::parse_bytes(b"12345", 10).unwrap();
+		let mut exp = BigUint::zero();
+		let mut modulus = BigUint::parse_bytes(b"789", 10).unwrap();
+		assert_eq!(me(base, exp, modulus), BigUint::one());
+
+		// 0^n % m == 0
+		base = BigUint::zero();
+		exp = BigUint::parse_bytes(b"12345", 10).unwrap();
+		modulus = BigUint::parse_bytes(b"789", 10).unwrap();
+		assert_eq!(me(base, exp, modulus), BigUint::zero());
+
+		// n^m % 1 == 0
+		base = BigUint::parse_bytes(b"12345", 10).unwrap();
+		exp = BigUint::parse_bytes(b"789", 10).unwrap();
+		modulus = BigUint::one();
+		assert_eq!(me(base, exp, modulus), BigUint::zero());
+
+		// if n % d == 0, then n^m % d == 0
+		base = BigUint::parse_bytes(b"12345", 10).unwrap();
+		exp = BigUint::parse_bytes(b"789", 10).unwrap();
+		modulus = BigUint::parse_bytes(b"15", 10).unwrap();
+		assert_eq!(me(base, exp, modulus), BigUint::zero());
+
+		// others
+		base = BigUint::parse_bytes(b"12345", 10).unwrap();
+		exp = BigUint::parse_bytes(b"789", 10).unwrap();
+		modulus = BigUint::parse_bytes(b"97", 10).unwrap();
+		assert_eq!(me(base, exp, modulus), BigUint::parse_bytes(b"55", 10).unwrap());
+	}

 	#[test]
 	fn identity() {
@@ -632,7 +708,7 @@ mod tests {
 	fn modexp() {

 		let f = Builtin {
-			pricer: Box::new(Modexp { divisor: 20 }),
+			pricer: Box::new(ModexpPricer { divisor: 20 }),
 			native: ethereum_builtin("modexp"),
 			activate_at: 0,
 		};
@@ -649,7 +725,7 @@ mod tests {

 			let mut output = vec![0u8; 32];
 			let expected = FromHex::from_hex("0000000000000000000000000000000000000000000000000000000000000001").unwrap();
-			let expected_cost = 1638;
+			let expected_cost = 13056;

 			f.execute(&input[..], &mut BytesRef::Fixed(&mut output[..])).expect("Builtin should not fail");
 			assert_eq!(output, expected);
@@ -660,15 +736,15 @@ mod tests {
 		{
 			let input = FromHex::from_hex("\
 				0000000000000000000000000000000000000000000000000000000000000000\
- 				0000000000000000000000000000000000000000000000000000000000000020\
- 				0000000000000000000000000000000000000000000000000000000000000020\
- 				fffffffffffffffffffffffffffffffffffffffffffffffffffffffefffffc2e\
- 				fffffffffffffffffffffffffffffffffffffffffffffffffffffffefffffc2f"
+				0000000000000000000000000000000000000000000000000000000000000020\
+				0000000000000000000000000000000000000000000000000000000000000020\
+				fffffffffffffffffffffffffffffffffffffffffffffffffffffffefffffc2e\
+				fffffffffffffffffffffffffffffffffffffffffffffffffffffffefffffc2f"
 			).unwrap();

 			let mut output = vec![0u8; 32];
 			let expected = FromHex::from_hex("0000000000000000000000000000000000000000000000000000000000000000").unwrap();
-			let expected_cost = 1638;
+			let expected_cost = 13056;

 			f.execute(&input[..], &mut BytesRef::Fixed(&mut output[..])).expect("Builtin should not fail");
 			assert_eq!(output, expected);
@@ -688,7 +764,7 @@ mod tests {

 			let mut output = vec![0u8; 32];
 			let expected = FromHex::from_hex("3b01b01ac41f2d6e917c6d6a221ce793802469026d9ab7578fa2e79e4da6aaab").unwrap();
-			let expected_cost = 102;
+			let expected_cost = 768;

 			f.execute(&input[..], &mut BytesRef::Fixed(&mut output[..])).expect("Builtin should not fail");
 			assert_eq!(output, expected);
@@ -719,7 +795,7 @@ mod tests {

 		let f = Builtin {
 			pricer: Box::new(Linear { base: 0, word: 0 }),
-			native: ethereum_builtin("bn128_add"),
+			native: ethereum_builtin("alt_bn128_add"),
 			activate_at: 0,
 		};

@@ -780,7 +856,7 @@ mod tests {

 		let f = Builtin {
 			pricer: Box::new(Linear { base: 0, word: 0 }),
-			native: ethereum_builtin("bn128_mul"),
+			native: ethereum_builtin("alt_bn128_mul"),
 			activate_at: 0,
 		};

@@ -820,7 +896,7 @@ mod tests {
 	fn builtin_pairing() -> Builtin {
 		Builtin {
 			pricer: Box::new(Linear { base: 0, word: 0 }),
-			native: ethereum_builtin("bn128_pairing"),
+			native: ethereum_builtin("alt_bn128_pairing"),
 			activate_at: 0,
 		}
 	}
--- a/ethcore/src/client/client.rs
+++ b/ethcore/src/client/client.rs
@@ -1120,6 +1120,41 @@ impl Client {
 			BlockId::Latest | BlockId::Pending => Some(self.chain.read().best_block_number()),
 		}
 	}
+
+	fn do_virtual_call(&self, env_info: &EnvInfo, state: &mut State<StateDB>, t: &SignedTransaction, analytics: CallAnalytics) -> Result<Executed, CallError> {
+		fn call<E, V, T>(
+			state: &mut State<StateDB>,
+			env_info: &EnvInfo,
+			engine: &E,
+			state_diff: bool,
+			transaction: &SignedTransaction,
+			options: TransactOptions<T, V>,
+		) -> Result<Executed, CallError> where
+			E: Engine + ?Sized,
+			T: trace::Tracer,
+			V: trace::VMTracer,
+		{
+			let options = options.dont_check_nonce();
+			let original_state = if state_diff { Some(state.clone()) } else { None };
+
+			let mut ret = Executive::new(state, env_info, engine).transact_virtual(transaction, options)?;
+
+			if let Some(original) = original_state {
+				ret.state_diff = Some(state.diff_from(original).map_err(ExecutionError::from)?);
+			}
+			Ok(ret)
+		}
+
+		let state_diff = analytics.state_diffing;
+		let engine = &*self.engine;
+
+		match (analytics.transaction_tracing, analytics.vm_tracing) {
+			(true, true) => call(state, env_info, engine, state_diff, t, TransactOptions::with_tracing_and_vm_tracing()),
+			(true, false) => call(state, env_info, engine, state_diff, t, TransactOptions::with_tracing()),
+			(false, true) => call(state, env_info, engine, state_diff, t, TransactOptions::with_vm_tracing()),
+			(false, false) => call(state, env_info, engine, state_diff, t, TransactOptions::with_no_tracing()),
+		}
+	}
 }

 impl snapshot::DatabaseRestore for Client {
@@ -1150,19 +1185,8 @@ impl BlockChainClient for Client {

 		// that's just a copy of the state.
 		let mut state = self.state_at(block).ok_or(CallError::StatePruned)?;
-		let original_state = if analytics.state_diffing { Some(state.clone()) } else { None };

-		let options = TransactOptions::new(analytics.transaction_tracing, analytics.vm_tracing)
-			.dont_check_nonce()
-			.save_output_from_contract();
-		let mut ret = Executive::new(&mut state, &env_info, &*self.engine).transact_virtual(t, options)?;
-
-		// TODO gav move this into Executive.
-		if let Some(original) = original_state {
-			ret.state_diff = Some(state.diff_from(original).map_err(ExecutionError::from)?);
-		}
-
-		Ok(ret)
+		self.do_virtual_call(&env_info, &mut state, t, analytics)
 	}

 	fn estimate_gas(&self, t: &SignedTransaction, block: BlockId) -> Result<U256, CallError> {
@@ -1177,7 +1201,7 @@ impl BlockChainClient for Client {
 		// that's just a copy of the state.
 		let original_state = self.state_at(block).ok_or(CallError::StatePruned)?;
 		let sender = t.sender();
-		let options = TransactOptions::with_tracing().dont_check_nonce();
+		let options = || TransactOptions::with_tracing();

 		let cond = |gas| {
 			let mut tx = t.as_unsigned().clone();
@@ -1186,7 +1210,7 @@ impl BlockChainClient for Client {

 			let mut state = original_state.clone();
 			Ok(Executive::new(&mut state, &env_info, &*self.engine)
-				.transact_virtual(&tx, options.clone())
+				.transact_virtual(&tx, options())
 				.map(|r| r.exception.is_none())
 				.unwrap_or(false))
 		};
@@ -1242,24 +1266,17 @@ impl BlockChainClient for Client {
 			return Err(CallError::TransactionNotFound);
 		}

-		let options = TransactOptions::new(analytics.transaction_tracing, analytics.vm_tracing)
-			.dont_check_nonce()
-			.save_output_from_contract();
 		const PROOF: &'static str = "Transactions fetched from blockchain; blockchain transactions are valid; qed";
 		let rest = txs.split_off(address.index);
 		for t in txs {
 			let t = SignedTransaction::new(t).expect(PROOF);
-			let x = Executive::new(&mut state, &env_info, &*self.engine).transact(&t, Default::default())?;
+			let x = Executive::new(&mut state, &env_info, &*self.engine).transact(&t, TransactOptions::with_no_tracing())?;
 			env_info.gas_used = env_info.gas_used + x.gas_used;
 		}
 		let first = rest.into_iter().next().expect("We split off < `address.index`; Length is checked earlier; qed");
 		let t = SignedTransaction::new(first).expect(PROOF);
-		let original_state = if analytics.state_diffing { Some(state.clone()) } else { None };
-		let mut ret = Executive::new(&mut state, &env_info, &*self.engine).transact(&t, options)?;
-		if let Some(original) = original_state {
-			ret.state_diff = Some(state.diff_from(original).map_err(ExecutionError::from)?)
-		}
-		Ok(ret)
+
+		self.do_virtual_call(&env_info, &mut state, &t, analytics)
 	}

 	fn mode(&self) -> IpcMode {
@@ -2047,11 +2064,13 @@ mod tests {
 		}];
 		let receipts = vec![Receipt {
 			state_root: state_root,
+			status_code: None,
 			gas_used: 5.into(),
 			log_bloom: Default::default(),
 			logs: vec![logs[0].clone()],
 		}, Receipt {
 			state_root: state_root,
+			status_code: None,
 			gas_used: gas_used,
 			log_bloom: Default::default(),
 			logs: logs.clone(),
--- a/ethcore/src/client/evm_test_client.rs
+++ b/ethcore/src/client/evm_test_client.rs
@@ -18,11 +18,11 @@

 use std::fmt;
 use std::sync::Arc;
-use util::{self, U256, journaldb, trie};
+use util::{self, U256, H256, journaldb, trie};
 use util::kvdb::{self, KeyValueDB};
-use {state, state_db, client, executive, trace, db, spec};
+use {state, state_db, client, executive, trace, transaction, db, spec, pod_state};
 use factory::Factories;
-use evm::{self, VMType};
+use evm::{self, VMType, FinalizationResult};
 use evm::action_params::ActionParams;

 /// EVM test Error.
@@ -33,9 +33,17 @@ pub enum EvmTestError {
 	/// EVM error.
 	Evm(evm::Error),
 	/// Initialization error.
-	Initialization(::error::Error),
+	ClientError(::error::Error),
 	/// Low-level database error.
 	Database(String),
+	/// Post-condition failure,
+	PostCondition(String),
+}
+
+impl<E: Into<::error::Error>> From<E> for EvmTestError {
+	fn from(err: E) -> Self {
+		EvmTestError::ClientError(err.into())
+	}
 }

 impl fmt::Display for EvmTestError {
@@ -45,52 +53,118 @@ impl fmt::Display for EvmTestError {
 		match *self {
 			Trie(ref err) => write!(fmt, "Trie: {}", err),
 			Evm(ref err) => write!(fmt, "EVM: {}", err),
-			Initialization(ref err) => write!(fmt, "Initialization: {}", err),
+			ClientError(ref err) => write!(fmt, "{}", err),
 			Database(ref err) => write!(fmt, "DB: {}", err),
+			PostCondition(ref err) => write!(fmt, "{}", err),
 		}
 	}
 }

-/// Simplified, single-block EVM test client.
-pub struct EvmTestClient {
-	state_db: state_db::StateDB,
-	factories: Factories,
-	spec: spec::Spec,
+use ethereum;
+use ethjson::state::test::ForkSpec;
+
+lazy_static! {
+	pub static ref FRONTIER: spec::Spec = ethereum::new_frontier_test();
+	pub static ref HOMESTEAD: spec::Spec = ethereum::new_homestead_test();
+	pub static ref EIP150: spec::Spec = ethereum::new_eip150_test();
+	pub static ref EIP161: spec::Spec = ethereum::new_eip161_test();
+	pub static ref BYZANTIUM: spec::Spec = ethereum::new_byzantium_test();
+	pub static ref BYZANTIUM_TRANSITION: spec::Spec = ethereum::new_transition_test();
 }

-impl EvmTestClient {
-	/// Creates new EVM test client with in-memory DB initialized with genesis of given Spec.
-	pub fn new(spec: spec::Spec) -> Result<Self, EvmTestError> {
-		let factories = Factories {
-			vm: evm::Factory::new(VMType::Interpreter, 5 * 1024),
-			trie: trie::TrieFactory::new(trie::TrieSpec::Secure),
-			accountdb: Default::default(),
-		};
-		let db = Arc::new(kvdb::in_memory(db::NUM_COLUMNS.expect("We use column-based DB; qed")));
-		let journal_db = journaldb::new(db.clone(), journaldb::Algorithm::EarlyMerge, db::COL_STATE);
-		let mut state_db = state_db::StateDB::new(journal_db, 5 * 1024 * 1024);
-		state_db = spec.ensure_db_good(state_db, &factories).map_err(EvmTestError::Initialization)?;
-		// Write DB
-		{
-			let mut batch = kvdb::DBTransaction::new();
-			state_db.journal_under(&mut batch, 0, &spec.genesis_header().hash()).map_err(|e| EvmTestError::Initialization(e.into()))?;
-			db.write(batch).map_err(EvmTestError::Database)?;
+/// Simplified, single-block EVM test client.
+pub struct EvmTestClient<'a> {
+	state: state::State<state_db::StateDB>,
+	spec: &'a spec::Spec,
+}
+
+impl<'a> EvmTestClient<'a> {
+	/// Converts a json spec definition into spec.
+	pub fn spec_from_json(spec: &ForkSpec) -> Option<&'static spec::Spec> {
+		match *spec {
+			ForkSpec::Frontier => Some(&*FRONTIER),
+			ForkSpec::Homestead => Some(&*HOMESTEAD),
+			ForkSpec::EIP150 => Some(&*EIP150),
+			ForkSpec::EIP158 => Some(&*EIP161),
+			ForkSpec::Byzantium => Some(&*BYZANTIUM),
+			ForkSpec::EIP158ToByzantiumAt5 => Some(&BYZANTIUM_TRANSITION),
+			ForkSpec::FrontierToHomesteadAt5 | ForkSpec::HomesteadToDaoAt5 | ForkSpec::HomesteadToEIP150At5 => None,
+			_ => None,
 		}
+	}
+
+	/// Creates new EVM test client with in-memory DB initialized with genesis of given Spec.
+	pub fn new(spec: &'a spec::Spec) -> Result<Self, EvmTestError> {
+		let factories = Self::factories();
+		let state =	Self::state_from_spec(spec, &factories)?;

 		Ok(EvmTestClient {
-			state_db,
-			factories,
+			state,
 			spec,
 		})
 	}

-	/// Call given contract.
+	/// Creates new EVM test client with in-memory DB initialized with given PodState.
+	pub fn from_pod_state(spec: &'a spec::Spec, pod_state: pod_state::PodState) -> Result<Self, EvmTestError> {
+		let factories = Self::factories();
+		let state =	Self::state_from_pod(spec, &factories, pod_state)?;
+
+		Ok(EvmTestClient {
+			state,
+			spec,
+		})
+	}
+
+	fn factories() -> Factories {
+		Factories {
+			vm: evm::Factory::new(VMType::Interpreter, 5 * 1024),
+			trie: trie::TrieFactory::new(trie::TrieSpec::Secure),
+			accountdb: Default::default(),
+		}
+	}
+
+	fn state_from_spec(spec: &'a spec::Spec, factories: &Factories) -> Result<state::State<state_db::StateDB>, EvmTestError> {
+		let db = Arc::new(kvdb::in_memory(db::NUM_COLUMNS.expect("We use column-based DB; qed")));
+		let journal_db = journaldb::new(db.clone(), journaldb::Algorithm::EarlyMerge, db::COL_STATE);
+		let mut state_db = state_db::StateDB::new(journal_db, 5 * 1024 * 1024);
+		state_db = spec.ensure_db_good(state_db, factories)?;
+
+		let genesis = spec.genesis_header();
+		// Write DB
+		{
+			let mut batch = kvdb::DBTransaction::new();
+			state_db.journal_under(&mut batch, 0, &genesis.hash())?;
+			db.write(batch).map_err(EvmTestError::Database)?;
+		}
+
+		state::State::from_existing(
+			state_db,
+			*genesis.state_root(),
+			spec.engine.account_start_nonce(0),
+			factories.clone()
+		).map_err(EvmTestError::Trie)
+	}
+
+	fn state_from_pod(spec: &'a spec::Spec, factories: &Factories, pod_state: pod_state::PodState) -> Result<state::State<state_db::StateDB>, EvmTestError> {
+		let db = Arc::new(kvdb::in_memory(db::NUM_COLUMNS.expect("We use column-based DB; qed")));
+		let journal_db = journaldb::new(db.clone(), journaldb::Algorithm::EarlyMerge, db::COL_STATE);
+		let state_db = state_db::StateDB::new(journal_db, 5 * 1024 * 1024);
+		let mut state = state::State::new(
+			state_db,
+			spec.engine.account_start_nonce(0),
+			factories.clone(),
+		);
+		state.populate_from(pod_state);
+		state.commit()?;
+		Ok(state)
+	}
+
+	/// Execute the VM given ActionParams and tracer.
+	/// Returns amount of gas left and the output.
 	pub fn call<T: trace::VMTracer>(&mut self, params: ActionParams, vm_tracer: &mut T)
-		-> Result<(U256, Vec<u8>), EvmTestError>
+		-> Result<FinalizationResult, EvmTestError>
 	{
 		let genesis = self.spec.genesis_header();
-		let mut state = state::State::from_existing(self.state_db.boxed_clone(), *genesis.state_root(), self.spec.engine.account_start_nonce(0), self.factories.clone())
-			.map_err(EvmTestError::Trie)?;
 		let info = client::EnvInfo {
 			number: genesis.number(),
 			author: *genesis.author(),
@@ -103,15 +177,71 @@ impl EvmTestClient {
 		let mut substate = state::Substate::new();
 		let mut tracer = trace::NoopTracer;
 		let mut output = vec![];
-		let mut executive = executive::Executive::new(&mut state, &info, &*self.spec.engine);
-		let (gas_left, _) = executive.call(
+		let mut executive = executive::Executive::new(&mut self.state, &info, &*self.spec.engine);
+		executive.call(
 			params,
 			&mut substate,
 			util::BytesRef::Flexible(&mut output),
 			&mut tracer,
 			vm_tracer,
-		).map_err(EvmTestError::Evm)?;
+		).map_err(EvmTestError::Evm)
+	}

-		Ok((gas_left, output))
+	/// Executes a SignedTransaction within context of the provided state and `EnvInfo`.
+	/// Returns the state root, gas left and the output.
+	pub fn transact<T: trace::VMTracer>(
+		&mut self,
+		env_info: &client::EnvInfo,
+		transaction: transaction::SignedTransaction,
+		vm_tracer: T,
+	) -> TransactResult {
+		let initial_gas = transaction.gas;
+		// Verify transaction
+		let is_ok = transaction.verify_basic(true, None, env_info.number >= self.spec.engine.params().eip86_transition);
+		if let Err(error) = is_ok {
+			return TransactResult::Err {
+				state_root: *self.state.root(),
+				error,
+			};
+		}
+
+		// Apply transaction
+		let tracer = trace::NoopTracer;
+		let result = self.state.apply_with_tracing(&env_info, &*self.spec.engine, &transaction, tracer, vm_tracer);
+
+		match result {
+			Ok(result) => {
+				self.state.commit().ok();
+				TransactResult::Ok {
+					state_root: *self.state.root(),
+					gas_left: initial_gas - result.receipt.gas_used,
+					output: result.output
+				}
+			},
+			Err(error) => TransactResult::Err {
+				state_root: *self.state.root(),
+				error,
+			},
+		}
 	}
 }
+
+/// A result of applying transaction to the state.
+pub enum TransactResult {
+	/// Successful execution
+	Ok {
+		/// State root
+		state_root: H256,
+		/// Amount of gas left
+		gas_left: U256,
+		/// Output
+		output: Vec<u8>,
+	},
+	/// Transaction failed to run
+	Err {
+		/// State root
+		state_root: H256,
+		/// Execution error
+		error: ::error::Error,
+	},
+}
--- a/ethcore/src/client/mod.rs
+++ b/ethcore/src/client/mod.rs
@@ -27,7 +27,7 @@ mod client;
 pub use self::client::*;
 pub use self::config::{Mode, ClientConfig, DatabaseCompactionProfile, BlockChainConfig, VMType};
 pub use self::error::Error;
-pub use self::evm_test_client::{EvmTestClient, EvmTestError};
+pub use self::evm_test_client::{EvmTestClient, EvmTestError, TransactResult};
 pub use self::test_client::{TestBlockChainClient, EachBlockWith};
 pub use self::chain_notify::ChainNotify;
 pub use self::traits::{BlockChainClient, MiningBlockChainClient, EngineClient};
--- a/ethcore/src/client/test_client.rs
+++ b/ethcore/src/client/test_client.rs
@@ -595,6 +595,7 @@ impl BlockChainClient for TestBlockChainClient {
 		if *hash > H256::from("f000000000000000000000000000000000000000000000000000000000000000") {
 			let receipt = BlockReceipts::new(vec![Receipt::new(
 				Some(H256::zero()),
+				None,
 				U256::zero(),
 				vec![])]);
 			let mut rlp = RlpStream::new();
--- a/ethcore/src/engines/mod.rs
+++ b/ethcore/src/engines/mod.rs
@@ -57,8 +57,8 @@ use ethkey::Signature;
 use util::*;

 /// Default EIP-210 contrat code.
-/// As defined in https://github.com/ethereum/EIPs/pull/210/commits/9df24a3714af42e3bf350265bdc75b486c909d7f#diff-e02a92c2fb96c1a1bfb05e4c6e2ef5daR49
-pub const DEFAULT_BLOCKHASH_CONTRACT: &'static str = "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";
+/// As defined in https://github.com/ethereum/EIPs/pull/210
+pub const DEFAULT_BLOCKHASH_CONTRACT: &'static str = "73fffffffffffffffffffffffffffffffffffffffe33141561006a5760014303600035610100820755610100810715156100455760003561010061010083050761010001555b6201000081071515610064576000356101006201000083050761020001555b5061013e565b4360003512151561008457600060405260206040f361013d565b61010060003543031315156100a857610100600035075460605260206060f361013c565b6101006000350715156100c55762010000600035430313156100c8565b60005b156100ea576101006101006000350507610100015460805260206080f361013b565b620100006000350715156101095763010000006000354303131561010c565b60005b1561012f57610100620100006000350507610200015460a052602060a0f361013a565b600060c052602060c0f35b5b5b5b5b";

 /// Voting errors.
 #[derive(Debug)]
--- a/ethcore/src/ethereum/ethash.rs
+++ b/ethcore/src/ethereum/ethash.rs
@@ -40,6 +40,7 @@ const SNAPSHOT_BLOCKS: u64 = 5000;
 /// Maximum number of blocks allowed in an ethash snapshot.
 const MAX_SNAPSHOT_BLOCKS: u64 = 30000;

+const DEFAULT_EIP649_DELAY: u64 = 3_000_000;

 /// Ethash params.
 #[derive(Debug, PartialEq)]
@@ -102,6 +103,12 @@ pub struct EthashParams {
 	pub min_gas_price_transition: u64,
 	/// Do not alow transactions with lower gas price.
 	pub min_gas_price: U256,
+	/// EIP-649 transition block.
+	pub eip649_transition: u64,
+	/// EIP-649 bomb delay.
+	pub eip649_delay: u64,
+	/// EIP-649 base reward.
+	pub eip649_reward: Option<U256>,
 }

 impl From<ethjson::spec::EthashParams> for EthashParams {
@@ -136,6 +143,9 @@ impl From<ethjson::spec::EthashParams> for EthashParams {
 			max_gas_limit: p.max_gas_limit.map_or(U256::max_value(), Into::into),
 			min_gas_price_transition: p.min_gas_price_transition.map_or(u64::max_value(), Into::into),
 			min_gas_price: p.min_gas_price.map_or(U256::zero(), Into::into),
+			eip649_transition: p.eip649_transition.map_or(u64::max_value(), Into::into),
+			eip649_delay: p.eip649_delay.map_or(DEFAULT_EIP649_DELAY, Into::into),
+			eip649_reward: p.eip649_reward.map(Into::into),
 		}
 	}
 }
@@ -207,8 +217,10 @@ impl Engine for Arc<Ethash> {
 		} else if block_number < self.ethash_params.eip150_transition {
 			Schedule::new_homestead()
 		} else {
+			/// There's no max_code_size transition so we tie it to eip161abc
+			let max_code_size = if block_number >= self.ethash_params.eip161abc_transition { self.ethash_params.max_code_size as usize } else { usize::max_value() };
 			let mut schedule = Schedule::new_post_eip150(
-				self.ethash_params.max_code_size as usize,
+				max_code_size,
 				block_number >= self.ethash_params.eip160_transition,
 				block_number >= self.ethash_params.eip161abc_transition,
 				block_number >= self.ethash_params.eip161d_transition);
@@ -287,8 +299,13 @@ impl Engine for Arc<Ethash> {
 	/// Apply the block reward on finalisation of the block.
 	/// This assumes that all uncles are valid uncles (i.e. of at least one generation before the current).
 	fn on_close_block(&self, block: &mut ExecutedBlock) -> Result<(), Error> {
-		let reward = self.ethash_params.block_reward;
 		let fields = block.fields_mut();
+		let reward = if fields.header.number() >= self.ethash_params.eip649_transition {
+			self.ethash_params.eip649_reward.unwrap_or(self.ethash_params.block_reward)
+		} else {
+			self.ethash_params.block_reward
+		};
+
 		let eras_rounds = self.ethash_params.ecip1017_era_rounds;
 		let (eras, reward) = ecip1017_eras_block_reward(eras_rounds, reward, fields.header.number());

@@ -455,7 +472,7 @@ fn ecip1017_eras_block_reward(era_rounds: u64, mut reward: U256, block_number:u6
 #[cfg_attr(feature="dev", allow(wrong_self_convention))]
 impl Ethash {
 	fn calculate_difficulty(&self, header: &Header, parent: &Header) -> U256 {
-		const EXP_DIFF_PERIOD: u64 = 100000;
+		const EXP_DIFF_PERIOD: u64 = 100_000;
 		if header.number() == 0 {
 			panic!("Can't calculate genesis block difficulty");
 		}
@@ -505,7 +522,11 @@ impl Ethash {
 		target = max(min_difficulty, target);
 		if header.number() < self.ethash_params.bomb_defuse_transition {
 			if header.number() < self.ethash_params.ecip1010_pause_transition {
-				let period = ((parent.number() + 1) / EXP_DIFF_PERIOD) as usize;
+				let mut number = header.number();
+				if number >= self.ethash_params.eip649_transition {
+					number = number.saturating_sub(self.ethash_params.eip649_delay);
+				}
+				let period = (number / EXP_DIFF_PERIOD) as usize;
 				if period > 1 {
 					target = max(min_difficulty, target + (U256::from(1) << (period - 2)));
 				}
--- a/ethcore/src/ethereum/mod.rs
+++ b/ethcore/src/ethereum/mod.rs
@@ -87,8 +87,11 @@ pub fn new_transition_test() -> Spec { load(None, include_bytes!("../../res/ethe
 /// Create a new Foundation Mainnet chain spec without genesis accounts.
 pub fn new_mainnet_like() -> Spec { load(None, include_bytes!("../../res/ethereum/frontier_like_test.json")) }

-/// Create a new Foundation Metropolis era spec.
-pub fn new_metropolis_test() -> Spec { load(None, include_bytes!("../../res/ethereum/metropolis_test.json")) }
+/// Create a new Foundation Byzantium era spec.
+pub fn new_byzantium_test() -> Spec { load(None, include_bytes!("../../res/ethereum/byzantium_test.json")) }
+
+/// Create a new Foundation Constantinople era spec.
+pub fn new_constantinople_test() -> Spec { load(None, include_bytes!("../../res/ethereum/constantinople_test.json")) }

 #[cfg(test)]
 mod tests {
@@ -151,6 +154,6 @@ mod tests {
 		new_eip161_test();
 		new_transition_test();
 		new_mainnet_like();
-		new_metropolis_test();
+		new_byzantium_test();
 	}
 }
--- a/ethcore/src/executive.rs
+++ b/ethcore/src/executive.rs
@@ -24,7 +24,7 @@ use evm::env_info::EnvInfo;
 use error::ExecutionError;
 use evm::{self, wasm, Factory, Ext, Finalize, CreateContractAddress, FinalizationResult, ReturnData, CleanDustMode};
 use externalities::*;
-use trace::{FlatTrace, Tracer, NoopTracer, ExecutiveTracer, VMTrace, VMTracer, ExecutiveVMTracer, NoopVMTracer};
+use trace::{self, FlatTrace, VMTrace, Tracer, VMTracer};
 use transaction::{Action, SignedTransaction};
 use crossbeam;
 pub use executed::{Executed, ExecutionResult};
@@ -64,24 +64,24 @@ pub fn contract_address(address_scheme: CreateContractAddress, sender: &Address,
 }

 /// Transaction execution options.
-#[derive(Default, Copy, Clone, PartialEq)]
-pub struct TransactOptions {
+#[derive(Copy, Clone, PartialEq)]
+pub struct TransactOptions<T, V> {
 	/// Enable call tracing.
-	pub tracing: bool,
+	pub tracer: T,
 	/// Enable VM tracing.
-	pub vm_tracing: bool,
+	pub vm_tracer: V,
 	/// Check transaction nonce before execution.
 	pub check_nonce: bool,
 	/// Records the output from init contract calls.
 	pub output_from_init_contract: bool,
 }

-impl TransactOptions {
+impl<T, V> TransactOptions<T, V> {
 	/// Create new `TransactOptions` with given tracer and VM tracer.
-	pub fn new(tracing: bool, vm_tracing: bool) -> Self {
+	pub fn new(tracer: T, vm_tracer: V) -> Self {
 		TransactOptions {
-			tracing,
-			vm_tracing,
+			tracer,
+			vm_tracer,
 			check_nonce: true,
 			output_from_init_contract: false,
 		}
@@ -98,42 +98,50 @@ impl TransactOptions {
 		self.output_from_init_contract = true;
 		self
 	}
+}

+impl TransactOptions<trace::ExecutiveTracer, trace::ExecutiveVMTracer> {
 	/// Creates new `TransactOptions` with default tracing and VM tracing.
 	pub fn with_tracing_and_vm_tracing() -> Self {
 		TransactOptions {
-			tracing: true,
-			vm_tracing: true,
+			tracer: trace::ExecutiveTracer::default(),
+			vm_tracer: trace::ExecutiveVMTracer::toplevel(),
 			check_nonce: true,
 			output_from_init_contract: false,
 		}
 	}
+}

+impl TransactOptions<trace::ExecutiveTracer, trace::NoopVMTracer> {
 	/// Creates new `TransactOptions` with default tracing and no VM tracing.
 	pub fn with_tracing() -> Self {
 		TransactOptions {
-			tracing: true,
-			vm_tracing: false,
+			tracer: trace::ExecutiveTracer::default(),
+			vm_tracer: trace::NoopVMTracer,
 			check_nonce: true,
 			output_from_init_contract: false,
 		}
 	}
+}

+impl TransactOptions<trace::NoopTracer, trace::ExecutiveVMTracer> {
 	/// Creates new `TransactOptions` with no tracing and default VM tracing.
 	pub fn with_vm_tracing() -> Self {
 		TransactOptions {
-			tracing: false,
-			vm_tracing: true,
+			tracer: trace::NoopTracer,
+			vm_tracer: trace::ExecutiveVMTracer::toplevel(),
 			check_nonce: true,
 			output_from_init_contract: false,
 		}
 	}
+}

+impl TransactOptions<trace::NoopTracer, trace::NoopVMTracer> {
 	/// Creates new `TransactOptions` without any tracing.
 	pub fn with_no_tracing() -> Self {
 		TransactOptions {
-			tracing: false,
-			vm_tracing: false,
+			tracer: trace::NoopTracer,
+			vm_tracer: trace::NoopVMTracer,
 			check_nonce: true,
 			output_from_init_contract: false,
 		}
@@ -201,25 +209,18 @@ impl<'a, B: 'a + StateBackend, E: Engine + ?Sized> Executive<'a, B, E> {
 	}

 	/// This function should be used to execute transaction.
-	pub fn transact(&'a mut self, t: &SignedTransaction, options: TransactOptions) -> Result<Executed, ExecutionError> {
-		let check = options.check_nonce;
-		let output = options.output_from_init_contract;
-		match options.tracing {
-			true => match options.vm_tracing {
-				true => self.transact_with_tracer(t, check, output, ExecutiveTracer::default(), ExecutiveVMTracer::toplevel()),
-				false => self.transact_with_tracer(t, check, output, ExecutiveTracer::default(), NoopVMTracer),
-			},
-			false => match options.vm_tracing {
-				true => self.transact_with_tracer(t, check, output, NoopTracer, ExecutiveVMTracer::toplevel()),
-				false => self.transact_with_tracer(t, check, output, NoopTracer, NoopVMTracer),
-			},
-		}
+	pub fn transact<T, V>(&'a mut self, t: &SignedTransaction, options: TransactOptions<T, V>)
+		-> Result<Executed, ExecutionError> where T: Tracer, V: VMTracer,
+	{
+		self.transact_with_tracer(t, options.check_nonce, options.output_from_init_contract,  options.tracer, options.vm_tracer)
 	}

 	/// Execute a transaction in a "virtual" context.
 	/// This will ensure the caller has enough balance to execute the desired transaction.
 	/// Used for extra-block executions for things like consensus contracts and RPCs
-	pub fn transact_virtual(&'a mut self, t: &SignedTransaction, options: TransactOptions) -> Result<Executed, ExecutionError> {
+	pub fn transact_virtual<T, V>(&'a mut self, t: &SignedTransaction, options: TransactOptions<T, V>)
+		-> Result<Executed, ExecutionError> where T: Tracer, V: VMTracer,
+	{
 		let sender = t.sender();
 		let balance = self.state.balance(&sender)?;
 		let needed_balance = t.value.saturating_add(t.gas.saturating_mul(t.gas_price));
@@ -232,7 +233,7 @@ impl<'a, B: 'a + StateBackend, E: Engine + ?Sized> Executive<'a, B, E> {
 	}

 	/// Execute transaction/call with tracing enabled
-	pub fn transact_with_tracer<T, V>(
+	fn transact_with_tracer<T, V>(
 		&'a mut self,
 		t: &SignedTransaction,
 		check_nonce: bool,
@@ -284,7 +285,7 @@ impl<'a, B: 'a + StateBackend, E: Engine + ?Sized> Executive<'a, B, E> {
 		let mut substate = Substate::new();

 		// NOTE: there can be no invalid transactions from this point.
-		if !t.is_unsigned() {
+		if !schedule.eip86 || !t.is_unsigned() {
 			self.state.inc_nonce(&sender)?;
 		}
 		self.state.sub_balance(&sender, &U256::from(gas_cost), &mut substate.to_cleanup_mode(&schedule))?;
@@ -328,7 +329,7 @@ impl<'a, B: 'a + StateBackend, E: Engine + ?Sized> Executive<'a, B, E> {
 		};

 		// finalize here!
-		Ok(self.finalize(t, substate, result, output, tracer.traces(), vm_tracer.drain())?)
+		Ok(self.finalize(t, substate, result, output, tracer.drain(), vm_tracer.drain())?)
 	}

 	fn exec_vm<T, V>(
@@ -376,12 +377,12 @@ impl<'a, B: 'a + StateBackend, E: Engine + ?Sized> Executive<'a, B, E> {
 		mut output: BytesRef,
 		tracer: &mut T,
 		vm_tracer: &mut V
-	) -> evm::Result<(U256, ReturnData)> where T: Tracer, V: VMTracer {
+	) -> evm::Result<FinalizationResult> where T: Tracer, V: VMTracer {

-		trace!("Executive::call(params={:?}) self.env_info={:?}", params, self.info);
+		trace!("Executive::call(params={:?}) self.env_info={:?}, static={}", params, self.info, self.static_flag);
 		if (params.call_type == CallType::StaticCall ||
-				((params.call_type == CallType::Call || params.call_type == CallType::DelegateCall) &&
-				 self.static_flag))
+				((params.call_type == CallType::Call) &&
+				self.static_flag))
 			&& params.value.value() > 0.into() {
 			return Err(evm::Error::MutableCallInStaticContext);
 		}
@@ -434,7 +435,11 @@ impl<'a, B: 'a + StateBackend, E: Engine + ?Sized> Executive<'a, B, E> {
 						);
 					}

-					Ok((params.gas - cost, ReturnData::empty()))
+					Ok(FinalizationResult {
+						gas_left: params.gas - cost,
+						return_data: ReturnData::new(output.to_owned(), 0, output.len()),
+						apply_state: true,
+					})
 				}
 			} else {
 				// just drain the whole gas
@@ -466,7 +471,7 @@ impl<'a, B: 'a + StateBackend, E: Engine + ?Sized> Executive<'a, B, E> {

 				trace!(target: "executive", "res={:?}", res);

-				let traces = subtracer.traces();
+				let traces = subtracer.drain();
 				match res {
 					Ok(ref res) => tracer.trace_call(
 						trace_info,
@@ -481,13 +486,17 @@ impl<'a, B: 'a + StateBackend, E: Engine + ?Sized> Executive<'a, B, E> {

 				self.enact_result(&res, substate, unconfirmed_substate);
 				trace!(target: "executive", "enacted: substate={:?}\n", substate);
-				res.map(|r| (r.gas_left, r.return_data))
+				res
 			} else {
 				// otherwise it's just a basic transaction, only do tracing, if necessary.
 				self.state.discard_checkpoint();

 				tracer.trace_call(trace_info, U256::zero(), trace_output, vec![]);
-				Ok((params.gas, ReturnData::empty()))
+				Ok(FinalizationResult {
+					gas_left: params.gas,
+					return_data: ReturnData::empty(),
+					apply_state: true,
+				})
 			}
 		}
 	}
@@ -502,13 +511,18 @@ impl<'a, B: 'a + StateBackend, E: Engine + ?Sized> Executive<'a, B, E> {
 		output: &mut Option<Bytes>,
 		tracer: &mut T,
 		vm_tracer: &mut V,
-	) -> evm::Result<(U256, ReturnData)> where T: Tracer, V: VMTracer {
+	) -> evm::Result<FinalizationResult> where T: Tracer, V: VMTracer {

-		let scheme = self.engine.create_address_scheme(self.info.number);
-		if scheme != CreateContractAddress::FromSenderAndNonce && self.state.exists_and_has_code(&params.address)? {
+		// EIP-684: If a contract creation is attempted, due to either a creation transaction or the
+		// CREATE (or future CREATE2) opcode, and the destination address already has either
+		// nonzero nonce, or nonempty code, then the creation throws immediately, with exactly
+		// the same behavior as would arise if the first byte in the init code were an invalid
+		// opcode. This applies retroactively starting from genesis.
+		if self.state.exists_and_has_code_or_nonce(&params.address)? {
 			return Err(evm::Error::OutOfGas);
 		}

+		trace!("Executive::create(params={:?}) self.env_info={:?}, static={}", params, self.info, self.static_flag);
 		if params.call_type == CallType::StaticCall || self.static_flag {
 			let trace_info = tracer.prepare_trace_create(&params);
 			tracer.trace_failed_create(trace_info, vec![], evm::Error::MutableCallInStaticContext.into());
@@ -552,13 +566,13 @@ impl<'a, B: 'a + StateBackend, E: Engine + ?Sized> Executive<'a, B, E> {
 				gas - res.gas_left,
 				trace_output.map(|data| output.as_ref().map(|out| out.to_vec()).unwrap_or(data)),
 				created,
-				subtracer.traces()
+				subtracer.drain()
 			),
-			Err(ref e) => tracer.trace_failed_create(trace_info, subtracer.traces(), e.into())
+			Err(ref e) => tracer.trace_failed_create(trace_info, subtracer.drain(), e.into())
 		};

 		self.enact_result(&res, substate, unconfirmed_substate);
-		res.map(|r| (r.gas_left, r.return_data))
+		res
 	}

 	/// Finalizes the transaction (does refunds and suicides).
@@ -566,7 +580,7 @@ impl<'a, B: 'a + StateBackend, E: Engine + ?Sized> Executive<'a, B, E> {
 		&mut self,
 		t: &SignedTransaction,
 		mut substate: Substate,
-		result: evm::Result<(U256, ReturnData)>,
+		result: evm::Result<FinalizationResult>,
 		output: Bytes,
 		trace: Vec<FlatTrace>,
 		vm_trace: Option<VMTrace>
@@ -580,7 +594,7 @@ impl<'a, B: 'a + StateBackend, E: Engine + ?Sized> Executive<'a, B, E> {
 		let refunds_bound = sstore_refunds + suicide_refunds;

 		// real ammount to refund
-		let gas_left_prerefund = match result { Ok((x, _)) => x, _ => 0.into() };
+		let gas_left_prerefund = match result { Ok(FinalizationResult{ gas_left, .. }) => gas_left, _ => 0.into() };
 		let refunded = cmp::min(refunds_bound, (t.gas - gas_left_prerefund) >> 1);
 		let gas_left = gas_left_prerefund + refunded;

@@ -624,9 +638,9 @@ impl<'a, B: 'a + StateBackend, E: Engine + ?Sized> Executive<'a, B, E> {
 					state_diff: None,
 				})
 			},
-			_ => {
+			Ok(r) => {
 				Ok(Executed {
-					exception: None,
+					exception: if r.apply_state { None } else { Some(evm::Error::Reverted) },
 					gas: t.gas,
 					gas_used: gas_used,
 					refunded: refunded,
@@ -652,6 +666,8 @@ impl<'a, B: 'a + StateBackend, E: Engine + ?Sized> Executive<'a, B, E> {
 				| Err(evm::Error::Wasm {..})
 				| Err(evm::Error::OutOfStack {..})
 				| Err(evm::Error::MutableCallInStaticContext)
+				| Err(evm::Error::OutOfBounds)
+				| Err(evm::Error::Reverted)
 				| Ok(FinalizationResult { apply_state: false, .. }) => {
 					self.state.revert_to_checkpoint();
 			},
@@ -709,7 +725,7 @@ mod tests {
 		let engine = TestEngine::new(0);
 		let mut substate = Substate::new();

-		let (gas_left, _) = {
+		let FinalizationResult { gas_left, .. } = {
 			let mut ex = Executive::new(&mut state, &info, &engine);
 			ex.create(params, &mut substate, &mut None, &mut NoopTracer, &mut NoopVMTracer).unwrap()
 		};
@@ -767,7 +783,7 @@ mod tests {
 		let engine = TestEngine::new(0);
 		let mut substate = Substate::new();

-		let (gas_left, _) = {
+		let FinalizationResult { gas_left, .. } = {
 			let mut ex = Executive::new(&mut state, &info, &engine);
 			ex.create(params, &mut substate, &mut None, &mut NoopTracer, &mut NoopVMTracer).unwrap()
 		};
@@ -825,7 +841,7 @@ mod tests {
 		let mut tracer = ExecutiveTracer::default();
 		let mut vm_tracer = ExecutiveVMTracer::toplevel();

-		let (gas_left, _) = {
+		let FinalizationResult { gas_left, .. } = {
 			let mut ex = Executive::new(&mut state, &info, &engine);
 			let output = BytesRef::Fixed(&mut[0u8;0]);
 			ex.call(params, &mut substate, output, &mut tracer, &mut vm_tracer).unwrap()
@@ -864,7 +880,7 @@ mod tests {
 			}),
 		}];

-		assert_eq!(tracer.traces(), expected_trace);
+		assert_eq!(tracer.drain(), expected_trace);

 		let expected_vm_trace = VMTrace {
 			parent_step: 0,
@@ -934,7 +950,7 @@ mod tests {
 		let mut tracer = ExecutiveTracer::default();
 		let mut vm_tracer = ExecutiveVMTracer::toplevel();

-		let (gas_left, _) = {
+		let FinalizationResult { gas_left, .. } = {
 			let mut ex = Executive::new(&mut state, &info, &engine);
 			ex.create(params.clone(), &mut substate, &mut None, &mut tracer, &mut vm_tracer).unwrap()
 		};
@@ -957,7 +973,7 @@ mod tests {
 			}),
 		}];

-		assert_eq!(tracer.traces(), expected_trace);
+		assert_eq!(tracer.drain(), expected_trace);

 		let expected_vm_trace = VMTrace {
 			parent_step: 0,
@@ -1019,7 +1035,7 @@ mod tests {
 		let engine = TestEngine::new(0);
 		let mut substate = Substate::new();

-		let (gas_left, _) = {
+		let FinalizationResult { gas_left, .. } = {
 			let mut ex = Executive::new(&mut state, &info, &engine);
 			ex.create(params, &mut substate, &mut None, &mut NoopTracer, &mut NoopVMTracer).unwrap()
 		};
@@ -1130,7 +1146,7 @@ mod tests {
 		let engine = TestEngine::new(0);
 		let mut substate = Substate::new();

-		let (gas_left, _) = {
+		let FinalizationResult { gas_left, .. } = {
 			let mut ex = Executive::new(&mut state, &info, &engine);
 			ex.call(params, &mut substate, BytesRef::Fixed(&mut []), &mut NoopTracer, &mut NoopVMTracer).unwrap()
 		};
@@ -1174,7 +1190,7 @@ mod tests {
 		let engine = TestEngine::new(0);
 		let mut substate = Substate::new();

-		let (gas_left, _) = {
+		let FinalizationResult { gas_left, .. } = {
 			let mut ex = Executive::new(&mut state, &info, &engine);
 			ex.call(params, &mut substate, BytesRef::Fixed(&mut []), &mut NoopTracer, &mut NoopVMTracer).unwrap()
 		};
@@ -1208,7 +1224,7 @@ mod tests {

 		let executed = {
 			let mut ex = Executive::new(&mut state, &info, &engine);
-			let opts = TransactOptions { check_nonce: true, tracing: false, vm_tracing: false, output_from_init_contract: false };
+			let opts = TransactOptions::with_no_tracing();
 			ex.transact(&t, opts).unwrap()
 		};

@@ -1245,7 +1261,7 @@ mod tests {

 		let res = {
 			let mut ex = Executive::new(&mut state, &info, &engine);
-			let opts = TransactOptions { check_nonce: true, tracing: false, vm_tracing: false, output_from_init_contract: false };
+			let opts = TransactOptions::with_no_tracing();
 			ex.transact(&t, opts)
 		};

@@ -1278,7 +1294,7 @@ mod tests {

 		let res = {
 			let mut ex = Executive::new(&mut state, &info, &engine);
-			let opts = TransactOptions { check_nonce: true, tracing: false, vm_tracing: false, output_from_init_contract: false };
+			let opts = TransactOptions::with_no_tracing();
 			ex.transact(&t, opts)
 		};

@@ -1311,7 +1327,7 @@ mod tests {

 		let res = {
 			let mut ex = Executive::new(&mut state, &info, &engine);
-			let opts = TransactOptions { check_nonce: true, tracing: false, vm_tracing: false, output_from_init_contract: false };
+			let opts = TransactOptions::with_no_tracing();
 			ex.transact(&t, opts)
 		};

@@ -1375,11 +1391,11 @@ mod tests {
 		let mut state = get_temp_state_with_factory(factory);
 		state.add_balance(&sender, &U256::from_str("152d02c7e14af68000000").unwrap(), CleanupMode::NoEmpty).unwrap();
 		let info = EnvInfo::default();
-		let engine = TestEngine::new_metropolis();
+		let engine = TestEngine::new_byzantium();
 		let mut substate = Substate::new();

 		let mut output = [0u8; 14];
-		let (result, _) = {
+		let FinalizationResult { gas_left: result, .. } = {
 			let mut ex = Executive::new(&mut state, &info, &engine);
 			ex.call(params, &mut substate, BytesRef::Fixed(&mut output), &mut NoopTracer, &mut NoopVMTracer).unwrap()
 		};
--- a/ethcore/src/externalities.rs
+++ b/ethcore/src/externalities.rs
@@ -23,6 +23,7 @@ use evm::env_info::EnvInfo;
 use executive::*;
 use evm::{self, Schedule, Ext, ContractCreateResult, MessageCallResult, CreateContractAddress, ReturnData};
 use evm::CallType;
+use evm::FinalizationResult;
 use transaction::UNSIGNED_SENDER;
 use trace::{Tracer, VMTracer};

@@ -121,6 +122,10 @@ impl<'a, T: 'a, V: 'a, B: 'a, E: 'a> Ext for Externalities<'a, T, V, B, E>
 		}
 	}

+	fn is_static(&self) -> bool {
+		return self.static_flag
+	}
+
 	fn exists(&self, address: &Address) -> evm::Result<bool> {
 		self.state.exists(address).map_err(Into::into)
 	}
@@ -210,21 +215,27 @@ impl<'a, T: 'a, V: 'a, B: 'a, E: 'a> Ext for Externalities<'a, T, V, B, E>
 			call_type: CallType::None,
 		};

-		if params.sender != UNSIGNED_SENDER {
-			if let Err(e) = self.state.inc_nonce(&self.origin_info.address) {
-				debug!(target: "ext", "Database corruption encountered: {:?}", e);
-				return ContractCreateResult::Failed
+		if !self.static_flag {
+			if !self.schedule.eip86 || params.sender != UNSIGNED_SENDER {
+				if let Err(e) = self.state.inc_nonce(&self.origin_info.address) {
+					debug!(target: "ext", "Database corruption encountered: {:?}", e);
+					return ContractCreateResult::Failed
+				}
 			}
 		}
 		let mut ex = Executive::from_parent(self.state, self.env_info, self.engine, self.depth, self.static_flag);

 		// TODO: handle internal error separately
 		match ex.create(params, self.substate, &mut None, self.tracer, self.vm_tracer) {
-			Ok((gas_left, _)) => {
+			Ok(FinalizationResult{ gas_left, apply_state: true, .. }) => {
 				self.substate.contracts_created.push(address.clone());
 				ContractCreateResult::Created(address, gas_left)
 			},
-			_ => ContractCreateResult::Failed
+			Ok(FinalizationResult{ gas_left, apply_state: false, return_data }) => {
+				ContractCreateResult::Reverted(gas_left, return_data)
+			},
+			Err(evm::Error::MutableCallInStaticContext) => ContractCreateResult::FailedInStaticCall,
+			_ => ContractCreateResult::Failed,
 		}
 	}

@@ -269,7 +280,8 @@ impl<'a, T: 'a, V: 'a, B: 'a, E: 'a> Ext for Externalities<'a, T, V, B, E>
 		let mut ex = Executive::from_parent(self.state, self.env_info, self.engine, self.depth, self.static_flag);

 		match ex.call(params, self.substate, BytesRef::Fixed(output), self.tracer, self.vm_tracer) {
-			Ok((gas_left, return_data)) => MessageCallResult::Success(gas_left, return_data),
+			Ok(FinalizationResult{ gas_left, return_data, apply_state: true }) => MessageCallResult::Success(gas_left, return_data),
+			Ok(FinalizationResult{ gas_left, return_data, apply_state: false }) => MessageCallResult::Reverted(gas_left, return_data),
 			_ => MessageCallResult::Failed
 		}
 	}
@@ -283,7 +295,7 @@ impl<'a, T: 'a, V: 'a, B: 'a, E: 'a> Ext for Externalities<'a, T, V, B, E>
 	}

 	#[cfg_attr(feature="dev", allow(match_ref_pats))]
-	fn ret(mut self, gas: &U256, data: &ReturnData) -> evm::Result<U256>
+	fn ret(mut self, gas: &U256, data: &ReturnData, apply_state: bool) -> evm::Result<U256>
 		where Self: Sized {
 		let handle_copy = |to: &mut Option<&mut Bytes>| {
 			to.as_mut().map(|b| **b = data.to_vec());
@@ -303,7 +315,7 @@ impl<'a, T: 'a, V: 'a, B: 'a, E: 'a> Ext for Externalities<'a, T, V, B, E>
 				vec.extend_from_slice(&*data);
 				Ok(*gas)
 			},
-			OutputPolicy::InitContract(ref mut copy) => {
+			OutputPolicy::InitContract(ref mut copy) if apply_state => {
 				let return_cost = U256::from(data.len()) * U256::from(self.schedule.create_data_gas);
 				if return_cost > *gas || data.len() > self.schedule.create_data_limit {
 					return match self.schedule.exceptional_failed_code_deposit {
@@ -311,12 +323,13 @@ impl<'a, T: 'a, V: 'a, B: 'a, E: 'a> Ext for Externalities<'a, T, V, B, E>
 						false => Ok(*gas)
 					}
 				}
-
 				handle_copy(copy);
-
 				self.state.init_code(&self.origin_info.address, data.to_vec())?;
 				Ok(*gas - return_cost)
-			}
+			},
+			OutputPolicy::InitContract(_) => {
+				Ok(*gas)
+			},
 		}
 	}

--- a/ethcore/src/json_tests/chain.rs
+++ b/ethcore/src/json_tests/chain.rs
@@ -14,17 +14,15 @@
 // You should have received a copy of the GNU General Public License
 // along with Parity.  If not, see <http://www.gnu.org/licenses/>.

-use super::test_common::*;
-use client::{BlockChainClient, Client, ClientConfig};
+use std::sync::Arc;
+use client::{EvmTestClient, BlockChainClient, Client, ClientConfig};
 use block::Block;
-use ethereum;
-use tests::helpers::*;
 use spec::Genesis;
 use ethjson;
 use miner::Miner;
 use io::IoChannel;

-pub fn json_chain_test(json_data: &[u8], era: ChainEra) -> Vec<String> {
+pub fn json_chain_test(json_data: &[u8]) -> Vec<String> {
 	::ethcore_logger::init_log();
 	let tests = ethjson::blockchain::Test::load(json_data).unwrap();
 	let mut failed = Vec::new();
@@ -42,15 +40,16 @@ pub fn json_chain_test(json_data: &[u8], era: ChainEra) -> Vec<String> {
 			flush!("   - {}...", name);

 			let spec = {
+				let mut spec = match EvmTestClient::spec_from_json(&blockchain.network) {
+					Some(spec) => (*spec).clone(),
+					None => {
+						println!("   - {} | {:?} Ignoring tests because of missing spec", name, blockchain.network);
+						continue;
+					}
+				};
+
 				let genesis = Genesis::from(blockchain.genesis());
 				let state = From::from(blockchain.pre_state.clone());
-				let mut spec = match era {
-					ChainEra::Frontier => ethereum::new_frontier_test(),
-					ChainEra::Homestead => ethereum::new_homestead_test(),
-					ChainEra::Eip150 => ethereum::new_eip150_test(),
-					ChainEra::_Eip161 => ethereum::new_eip161_test(),
-					ChainEra::TransitionTest => ethereum::new_transition_test(),
-				};
 				spec.set_genesis_state(state).expect("Failed to overwrite genesis state");
 				spec.overwrite_genesis_params(genesis);
 				assert!(spec.is_state_root_valid());
@@ -86,67 +85,69 @@ pub fn json_chain_test(json_data: &[u8], era: ChainEra) -> Vec<String> {
 	failed
 }

-mod frontier_era_tests {
-	use tests::helpers::*;
+mod block_tests {
 	use super::json_chain_test;

 	fn do_json_test(json_data: &[u8]) -> Vec<String> {
-		json_chain_test(json_data, ChainEra::Frontier)
+		json_chain_test(json_data)
 	}

 	declare_test!{BlockchainTests_bcBlockGasLimitTest, "BlockchainTests/bcBlockGasLimitTest"}
-	declare_test!{BlockchainTests_bcForkBlockTest, "BlockchainTests/bcForkBlockTest"}
+	declare_test!{BlockchainTests_bcExploitTest, "BlockchainTests/bcExploitTest"}
+	declare_test!{BlockchainTests_bcForgedTest, "BlockchainTests/bcForgedTest"}
 	declare_test!{BlockchainTests_bcForkStressTest, "BlockchainTests/bcForkStressTest"}
-	declare_test!{BlockchainTests_bcForkUncle, "BlockchainTests/bcForkUncle"}
 	declare_test!{BlockchainTests_bcGasPricerTest, "BlockchainTests/bcGasPricerTest"}
 	declare_test!{BlockchainTests_bcInvalidHeaderTest, "BlockchainTests/bcInvalidHeaderTest"}
-	// TODO [ToDr] Ignored because of incorrect JSON (https://github.com/ethereum/tests/pull/113)
-	declare_test!{ignore => BlockchainTests_bcInvalidRLPTest, "BlockchainTests/bcInvalidRLPTest"}
 	declare_test!{BlockchainTests_bcMultiChainTest, "BlockchainTests/bcMultiChainTest"}
-	declare_test!{BlockchainTests_bcRPC_API_Test, "BlockchainTests/bcRPC_API_Test"}
-	declare_test!{BlockchainTests_bcStateTest, "BlockchainTests/bcStateTest"}
+	declare_test!{BlockchainTests_bcRandomBlockhashTest, "BlockchainTests/bcRandomBlockhashTest"}
 	declare_test!{BlockchainTests_bcTotalDifficultyTest, "BlockchainTests/bcTotalDifficultyTest"}
 	declare_test!{BlockchainTests_bcUncleHeaderValiditiy, "BlockchainTests/bcUncleHeaderValiditiy"}
 	declare_test!{BlockchainTests_bcUncleTest, "BlockchainTests/bcUncleTest"}
 	declare_test!{BlockchainTests_bcValidBlockTest, "BlockchainTests/bcValidBlockTest"}
 	declare_test!{BlockchainTests_bcWalletTest, "BlockchainTests/bcWalletTest"}

-	declare_test!{BlockchainTests_RandomTests_bl10251623GO, "BlockchainTests/RandomTests/bl10251623GO"}
-	declare_test!{BlockchainTests_RandomTests_bl201507071825GO, "BlockchainTests/RandomTests/bl201507071825GO"}
+	declare_test!{BlockchainTests_GeneralStateTest_stAttackTest, "BlockchainTests/GeneralStateTests/stAttackTest/"}
+	declare_test!{BlockchainTests_GeneralStateTest_stBadOpcodeTest, "BlockchainTests/GeneralStateTests/stBadOpcode/"}
+	declare_test!{BlockchainTests_GeneralStateTest_stCallCodes, "BlockchainTests/GeneralStateTests/stCallCodes/"}
+	declare_test!{BlockchainTests_GeneralStateTest_stCallDelegateCodesCallCodeHomestead, "BlockchainTests/GeneralStateTests/stCallDelegateCodesCallCodeHomestead/"}
+	declare_test!{BlockchainTests_GeneralStateTest_stCallDelegateCodesHomestead, "BlockchainTests/GeneralStateTests/stCallDelegateCodesHomestead/"}
+	declare_test!{BlockchainTests_GeneralStateTest_stChangedEIP150, "BlockchainTests/GeneralStateTests/stChangedEIP150/"}
+	declare_test!{BlockchainTests_GeneralStateTest_stCodeSizeLimit, "BlockchainTests/GeneralStateTests/stCodeSizeLimit/"}
+	declare_test!{BlockchainTests_GeneralStateTest_stCreateTest, "BlockchainTests/GeneralStateTests/stCreateTest/"}
+	declare_test!{BlockchainTests_GeneralStateTest_stDelegatecallTestHomestead, "BlockchainTests/GeneralStateTests/stDelegatecallTestHomestead/"}
+	declare_test!{BlockchainTests_GeneralStateTest_stEIP150singleCodeGasPrices, "BlockchainTests/GeneralStateTests/stEIP150singleCodeGasPrices/"}
+	declare_test!{BlockchainTests_GeneralStateTest_stEIP150Specific, "BlockchainTests/GeneralStateTests/stEIP150Specific/"}
+	declare_test!{BlockchainTests_GeneralStateTest_stEIP158Specific, "BlockchainTests/GeneralStateTests/stEIP158Specific/"}
+	declare_test!{BlockchainTests_GeneralStateTest_stExample, "BlockchainTests/GeneralStateTests/stExample/"}
+	declare_test!{BlockchainTests_GeneralStateTest_stHomesteadSpecific, "BlockchainTests/GeneralStateTests/stHomesteadSpecific/"}
+	declare_test!{BlockchainTests_GeneralStateTest_stInitCodeTest, "BlockchainTests/GeneralStateTests/stInitCodeTest/"}
+	declare_test!{BlockchainTests_GeneralStateTest_stLogTests, "BlockchainTests/GeneralStateTests/stLogTests/"}
+	declare_test!{BlockchainTests_GeneralStateTest_stMemExpandingEIP150Calls, "BlockchainTests/GeneralStateTests/stMemExpandingEIP150Calls/"}
+	declare_test!{heavy => BlockchainTests_GeneralStateTest_stMemoryStressTest, "BlockchainTests/GeneralStateTests/stMemoryStressTest/"}
+	declare_test!{BlockchainTests_GeneralStateTest_stMemoryTest, "BlockchainTests/GeneralStateTests/stMemoryTest/"}
+	declare_test!{BlockchainTests_GeneralStateTest_stNonZeroCallsTest, "BlockchainTests/GeneralStateTests/stNonZeroCallsTest/"}
+	declare_test!{BlockchainTests_GeneralStateTest_stPreCompiledContracts, "BlockchainTests/GeneralStateTests/stPreCompiledContracts/"}
+	declare_test!{heavy => BlockchainTests_GeneralStateTest_stQuadraticComplexityTest, "BlockchainTests/GeneralStateTests/stQuadraticComplexityTest/"}
+	declare_test!{BlockchainTests_GeneralStateTest_stRandom, "BlockchainTests/GeneralStateTests/stRandom/"}
+	declare_test!{BlockchainTests_GeneralStateTest_stRecursiveCreate, "BlockchainTests/GeneralStateTests/stRecursiveCreate/"}
+	declare_test!{BlockchainTests_GeneralStateTest_stRefundTest, "BlockchainTests/GeneralStateTests/stRefundTest/"}
+	declare_test!{BlockchainTests_GeneralStateTest_stReturnDataTest, "BlockchainTests/GeneralStateTests/stReturnDataTest/"}
+	declare_test!{BlockchainTests_GeneralStateTest_stRevertTest, "BlockchainTests/GeneralStateTests/stRevertTest/"}
+	declare_test!{BlockchainTests_GeneralStateTest_stSolidityTest, "BlockchainTests/GeneralStateTests/stSolidityTest/"}
+	declare_test!{BlockchainTests_GeneralStateTest_stSpecialTest, "BlockchainTests/GeneralStateTests/stSpecialTest/"}
+	declare_test!{BlockchainTests_GeneralStateTest_stStackTests, "BlockchainTests/GeneralStateTests/stStackTests/"}
+	declare_test!{BlockchainTests_GeneralStateTest_stStaticCall, "BlockchainTests/GeneralStateTests/stStaticCall/"}
+	declare_test!{BlockchainTests_GeneralStateTest_stSystemOperationsTest, "BlockchainTests/GeneralStateTests/stSystemOperationsTest/"}
+	declare_test!{BlockchainTests_GeneralStateTest_stTransactionTest, "BlockchainTests/GeneralStateTests/stTransactionTest/"}
+	declare_test!{BlockchainTests_GeneralStateTest_stTransitionTest, "BlockchainTests/GeneralStateTests/stTransitionTest/"}
+	declare_test!{BlockchainTests_GeneralStateTest_stWalletTest, "BlockchainTests/GeneralStateTests/stWalletTest/"}
+	declare_test!{BlockchainTests_GeneralStateTest_stZeroCallsRevert, "BlockchainTests/GeneralStateTests/stZeroCallsRevert/"}
+	declare_test!{BlockchainTests_GeneralStateTest_stZeroCallsTest, "BlockchainTests/GeneralStateTests/stZeroCallsTest/"}
+	declare_test!{BlockchainTests_GeneralStateTest_stZeroKnowledge, "BlockchainTests/GeneralStateTests/stZeroKnowledge/"}
+
+	declare_test!{BlockchainTests_TransitionTests_bcEIP158ToByzantium, "BlockchainTests/TransitionTests/bcEIP158ToByzantium/"}
+	declare_test!{BlockchainTests_TransitionTests_bcFrontierToHomestead, "BlockchainTests/TransitionTests/bcFrontierToHomestead/"}
+	declare_test!{BlockchainTests_TransitionTests_bcHomesteadToDao, "BlockchainTests/TransitionTests/bcHomesteadToDao/"}
+	declare_test!{BlockchainTests_TransitionTests_bcHomesteadToEIP150, "BlockchainTests/TransitionTests/bcHomesteadToEIP150/"}
 }

-mod transition_tests {
-	use tests::helpers::*;
-	use super::json_chain_test;
-
-	fn do_json_test(json_data: &[u8]) -> Vec<String> {
-		json_chain_test(json_data, ChainEra::TransitionTest)
-	}
-
-	declare_test!{BlockchainTests_TestNetwork_bcSimpleTransitionTest, "BlockchainTests/TestNetwork/bcSimpleTransitionTest"}
-	declare_test!{BlockchainTests_TestNetwork_bcTheDaoTest, "BlockchainTests/TestNetwork/bcTheDaoTest"}
-	declare_test!{BlockchainTests_TestNetwork_bcEIP150Test, "BlockchainTests/TestNetwork/bcEIP150Test"}
-}
-
-mod eip150_blockchain_tests {
-	use tests::helpers::*;
-	use super::json_chain_test;
-
-	fn do_json_test(json_data: &[u8]) -> Vec<String> {
-		json_chain_test(json_data, ChainEra::Eip150)
-	}
-
-	declare_test!{BlockchainTests_EIP150_bcBlockGasLimitTest, "BlockchainTests/EIP150/bcBlockGasLimitTest"}
-	declare_test!{BlockchainTests_EIP150_bcForkStressTest, "BlockchainTests/EIP150/bcForkStressTest"}
-	declare_test!{BlockchainTests_EIP150_bcGasPricerTest, "BlockchainTests/EIP150/bcGasPricerTest"}
-	declare_test!{BlockchainTests_EIP150_bcInvalidHeaderTest, "BlockchainTests/EIP150/bcInvalidHeaderTest"}
-	declare_test!{BlockchainTests_EIP150_bcInvalidRLPTest, "BlockchainTests/EIP150/bcInvalidRLPTest"}
-	declare_test!{BlockchainTests_EIP150_bcMultiChainTest, "BlockchainTests/EIP150/bcMultiChainTest"}
-	declare_test!{BlockchainTests_EIP150_bcRPC_API_Test, "BlockchainTests/EIP150/bcRPC_API_Test"}
-	declare_test!{BlockchainTests_EIP150_bcStateTest, "BlockchainTests/EIP150/bcStateTest"}
-	declare_test!{BlockchainTests_EIP150_bcTotalDifficultyTest, "BlockchainTests/EIP150/bcTotalDifficultyTest"}
-	declare_test!{BlockchainTests_EIP150_bcUncleHeaderValiditiy, "BlockchainTests/EIP150/bcUncleHeaderValiditiy"}
-	declare_test!{BlockchainTests_EIP150_bcUncleTest, "BlockchainTests/EIP150/bcUncleTest"}
-	declare_test!{BlockchainTests_EIP150_bcValidBlockTest, "BlockchainTests/EIP150/bcValidBlockTest"}
-	declare_test!{BlockchainTests_EIP150_bcWalletTest, "BlockchainTests/EIP150/bcWalletTest"}
-}
--- a/ethcore/src/json_tests/executive.rs
+++ b/ethcore/src/json_tests/executive.rs
@@ -28,6 +28,7 @@ use tests::helpers::*;
 use ethjson;
 use trace::{Tracer, NoopTracer};
 use trace::{VMTracer, NoopVMTracer};
+use rlp::RlpStream;

 #[derive(Debug, PartialEq, Clone)]
 struct CallCreate {
@@ -158,8 +159,8 @@ impl<'a, T: 'a, V: 'a, B: 'a, E: 'a> Ext for TestExt<'a, T, V, B, E>
 		self.ext.log(topics, data)
 	}

-	fn ret(self, gas: &U256, data: &ReturnData) -> Result<U256, evm::Error> {
-		self.ext.ret(gas, data)
+	fn ret(self, gas: &U256, data: &ReturnData, apply_state: bool) -> Result<U256, evm::Error> {
+		self.ext.ret(gas, data, apply_state)
 	}

 	fn suicide(&mut self, refund_address: &Address) -> evm::Result<()> {
@@ -178,6 +179,10 @@ impl<'a, T: 'a, V: 'a, B: 'a, E: 'a> Ext for TestExt<'a, T, V, B, E>
 		0
 	}

+	fn is_static(&self) -> bool {
+		false
+	}
+
 	fn inc_sstore_clears(&mut self) {
 		self.ext.inc_sstore_clears()
 	}
@@ -251,6 +256,14 @@ fn do_json_test_for(vm_type: &VMType, json_data: &[u8]) -> Vec<String> {
 			(res.finalize(ex), callcreates)
 		};

+		let log_hash = {
+			let mut rlp = RlpStream::new_list(substate.logs.len());
+			for l in &substate.logs {
+				rlp.append(l);
+			}
+			&rlp.drain().sha3()
+		};
+
 		match res {
 			Err(_) => fail_unless(out_of_gas, "didn't expect to run out of gas."),
 			Ok(res) => {
@@ -258,6 +271,7 @@ fn do_json_test_for(vm_type: &VMType, json_data: &[u8]) -> Vec<String> {
 				fail_unless(Some(res.gas_left) == vm.gas_left.map(Into::into), "gas_left is incorrect");
 				let vm_output: Option<Vec<u8>> = vm.output.map(Into::into);
 				fail_unless(Some(output) == vm_output, "output is incorrect");
+				fail_unless(Some(*log_hash) == vm.logs.map(|h| h.0), "logs are incorrect");

 				for (address, account) in vm.post_state.unwrap().into_iter() {
 					let address = address.into();
@@ -291,15 +305,15 @@ fn do_json_test_for(vm_type: &VMType, json_data: &[u8]) -> Vec<String> {
 }

 declare_test!{ExecutiveTests_vmArithmeticTest, "VMTests/vmArithmeticTest"}
-declare_test!{ExecutiveTests_vmBitwiseLogicOperationTest, "VMTests/vmBitwiseLogicOperationTest"}
+declare_test!{ExecutiveTests_vmBitwiseLogicOperationTest, "VMTests/vmBitwiseLogicOperation"}
 declare_test!{ExecutiveTests_vmBlockInfoTest, "VMTests/vmBlockInfoTest"}
 // TODO [todr] Fails with Signal 11 when using JIT
-declare_test!{ExecutiveTests_vmEnvironmentalInfoTest, "VMTests/vmEnvironmentalInfoTest"}
-declare_test!{ExecutiveTests_vmIOandFlowOperationsTest, "VMTests/vmIOandFlowOperationsTest"}
-declare_test!{heavy => ExecutiveTests_vmInputLimits, "VMTests/vmInputLimits"}
+declare_test!{ExecutiveTests_vmEnvironmentalInfoTest, "VMTests/vmEnvironmentalInfo"}
+declare_test!{ExecutiveTests_vmIOandFlowOperationsTest, "VMTests/vmIOandFlowOperations"}
 declare_test!{ExecutiveTests_vmLogTest, "VMTests/vmLogTest"}
-declare_test!{ExecutiveTests_vmPerformanceTest, "VMTests/vmPerformanceTest"}
+declare_test!{heavy => ExecutiveTests_vmPerformance, "VMTests/vmPerformance"}
 declare_test!{ExecutiveTests_vmPushDupSwapTest, "VMTests/vmPushDupSwapTest"}
+declare_test!{ExecutiveTests_vmRandomTest, "VMTests/vmRandomTest"}
 declare_test!{ExecutiveTests_vmSha3Test, "VMTests/vmSha3Test"}
-declare_test!{ExecutiveTests_vmSystemOperationsTest, "VMTests/vmSystemOperationsTest"}
-declare_test!{ExecutiveTests_vmtests, "VMTests/vmtests"}
+declare_test!{ExecutiveTests_vmSystemOperationsTest, "VMTests/vmSystemOperations"}
+declare_test!{ExecutiveTests_vmTests, "VMTests/vmTests"}
--- a/ethcore/src/json_tests/homestead_chain.rs
+++ b/ethcore/src/json_tests/homestead_chain.rs
@@ -1,39 +0,0 @@
-// Copyright 2015-2017 Parity Technologies (UK) Ltd.
-// This file is part of Parity.
-
-// Parity is free software: you can redistribute it and/or modify
-// it under the terms of the GNU General Public License as published by
-// the Free Software Foundation, either version 3 of the License, or
-// (at your option) any later version.
-
-// Parity is distributed in the hope that it will be useful,
-// but WITHOUT ANY WARRANTY; without even the implied warranty of
-// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
-// GNU General Public License for more details.
-
-// You should have received a copy of the GNU General Public License
-// along with Parity.  If not, see <http://www.gnu.org/licenses/>.
-
-use super::chain::json_chain_test;
-use tests::helpers::*;
-
-fn do_json_test(json_data: &[u8]) -> Vec<String> {
-	json_chain_test(json_data, ChainEra::Homestead)
-}
-
-declare_test!{BlockchainTests_Homestead_bcBlockGasLimitTest, "BlockchainTests/Homestead/bcBlockGasLimitTest"}
-declare_test!{BlockchainTests_Homestead_bcForkStressTest, "BlockchainTests/Homestead/bcForkStressTest"}
-declare_test!{BlockchainTests_Homestead_bcGasPricerTest, "BlockchainTests/Homestead/bcGasPricerTest"}
-declare_test!{BlockchainTests_Homestead_bcInvalidHeaderTest, "BlockchainTests/Homestead/bcInvalidHeaderTest"}
-declare_test!{BlockchainTests_Homestead_bcInvalidRLPTest, "BlockchainTests/Homestead/bcInvalidRLPTest"}
-declare_test!{BlockchainTests_Homestead_bcMultiChainTest, "BlockchainTests/Homestead/bcMultiChainTest"}
-declare_test!{BlockchainTests_Homestead_bcRPC_API_Test, "BlockchainTests/Homestead/bcRPC_API_Test"}
-declare_test!{BlockchainTests_Homestead_bcStateTest, "BlockchainTests/Homestead/bcStateTest"}
-declare_test!{BlockchainTests_Homestead_bcTotalDifficultyTest, "BlockchainTests/Homestead/bcTotalDifficultyTest"}
-declare_test!{BlockchainTests_Homestead_bcUncleHeaderValiditiy, "BlockchainTests/Homestead/bcUncleHeaderValiditiy"}
-declare_test!{BlockchainTests_Homestead_bcUncleTest, "BlockchainTests/Homestead/bcUncleTest"}
-declare_test!{BlockchainTests_Homestead_bcValidBlockTest, "BlockchainTests/Homestead/bcValidBlockTest"}
-declare_test!{BlockchainTests_Homestead_bcWalletTest, "BlockchainTests/Homestead/bcWalletTest"}
-declare_test!{BlockchainTests_Homestead_bcShanghaiLove, "BlockchainTests/Homestead/bcShanghaiLove"}
-declare_test!{BlockchainTests_Homestead_bcSuicideIssue, "BlockchainTests/Homestead/bcSuicideIssue"}
-declare_test!{BlockchainTests_Homestead_bcExploitTest, "BlockchainTests/Homestead/bcExploitTest"}
--- a/ethcore/src/json_tests/mod.rs
+++ b/ethcore/src/json_tests/mod.rs
@@ -21,5 +21,4 @@ mod transaction;
 mod executive;
 mod state;
 mod chain;
-mod homestead_chain;
 mod trie;
--- a/ethcore/src/json_tests/state.rs
+++ b/ethcore/src/json_tests/state.rs
@@ -15,23 +15,13 @@
 // along with Parity.  If not, see <http://www.gnu.org/licenses/>.

 use super::test_common::*;
-use tests::helpers::*;
 use pod_state::PodState;
-use ethereum;
-use spec::Spec;
+use trace;
+use client::{EvmTestClient, EvmTestError, TransactResult};
 use ethjson;
-use ethjson::state::test::ForkSpec;
 use transaction::SignedTransaction;
 use evm::env_info::EnvInfo;

-lazy_static! {
-	pub static ref FRONTIER: Spec = ethereum::new_frontier_test();
-	pub static ref HOMESTEAD: Spec = ethereum::new_homestead_test();
-	pub static ref EIP150: Spec = ethereum::new_eip150_test();
-	pub static ref EIP161: Spec = ethereum::new_eip161_test();
-	pub static ref _METROPOLIS: Spec = ethereum::new_metropolis_test();
-}
-
 pub fn json_chain_test(json_data: &[u8]) -> Vec<String> {
 	::ethcore_logger::init_log();
 	let tests = ethjson::state::test::Test::load(json_data).unwrap();
@@ -43,35 +33,49 @@ pub fn json_chain_test(json_data: &[u8]) -> Vec<String> {
 			let env: EnvInfo = test.env.into();
 			let pre: PodState = test.pre_state.into();

-			for (spec, states) in test.post_states {
+			for (spec_name, states) in test.post_states {
 				let total = states.len();
-				let engine = match spec {
-					ForkSpec::Frontier => &FRONTIER.engine,
-					ForkSpec::Homestead => &HOMESTEAD.engine,
-					ForkSpec::EIP150 => &EIP150.engine,
-					ForkSpec::EIP158 => &EIP161.engine,
-					ForkSpec::Metropolis => continue,
+				let spec = match EvmTestClient::spec_from_json(&spec_name) {
+					Some(spec) => spec,
+					None => {
+						println!("   - {} | {:?} Ignoring tests because of missing spec", name, spec_name);
+						continue;
+					}
 				};

 				for (i, state) in states.into_iter().enumerate() {
-					let info = format!("   - {} | {:?} ({}/{}) ...", name, spec, i + 1, total);
+					let info = format!("   - {} | {:?} ({}/{}) ...", name, spec_name, i + 1, total);

 					let post_root: H256 = state.hash.into();
 					let transaction: SignedTransaction = multitransaction.select(&state.indexes).into();
-					let mut state = get_temp_state();
-					state.populate_from(pre.clone());
-					if transaction.verify_basic(true, None, env.number >= engine.params().eip86_transition).is_ok() {
-						state.commit().expect(&format!("State test {} failed due to internal error.", name));
-						let _res = state.apply(&env, &**engine, &transaction, false);
-					} else {
-						let _rest = state.commit();
-					}
-					if state.root() != &post_root {
-						println!("{} !!! State mismatch (got: {}, expect: {}", info, state.root(), post_root);
-						flushln!("{} fail", info);
-						failed.push(name.clone());
-					} else {
-						flushln!("{} ok", info);
+
+					let result = || -> Result<_, EvmTestError> {
+						Ok(EvmTestClient::from_pod_state(spec, pre.clone())?
+							.transact(&env, transaction, trace::NoopVMTracer))
+					};
+					match result() {
+						Err(err) => {
+							println!("{} !!! Unexpected internal error: {:?}", info, err);
+							flushln!("{} fail", info);
+							failed.push(name.clone());
+						},
+						Ok(TransactResult::Ok { state_root, .. }) if state_root != post_root => {
+							println!("{} !!! State mismatch (got: {}, expect: {}", info, state_root, post_root);
+							flushln!("{} fail", info);
+							failed.push(name.clone());
+						},
+						Ok(TransactResult::Err { state_root, ref error }) if state_root != post_root => {
+							println!("{} !!! State mismatch (got: {}, expect: {}", info, state_root, post_root);
+							println!("{} !!! Execution error: {:?}", info, error);
+							flushln!("{} fail", info);
+							failed.push(name.clone());
+						},
+						Ok(TransactResult::Err { error, .. }) => {
+							flushln!("{} ok ({:?})", info, error);
+						},
+						Ok(_) => {
+							flushln!("{} ok", info);
+						},
 					}
 				}
 			}
@@ -93,9 +97,8 @@ mod state_tests {
 	}

 	declare_test!{GeneralStateTest_stAttackTest, "GeneralStateTests/stAttackTest/"}
-	declare_test!{GeneralStateTest_stBoundsTest, "GeneralStateTests/stBoundsTest/"}
+	declare_test!{GeneralStateTest_stBadOpcodeTest, "GeneralStateTests/stBadOpcode/"}
 	declare_test!{GeneralStateTest_stCallCodes, "GeneralStateTests/stCallCodes/"}
-	declare_test!{skip => [ "createJS_ExampleContract" ], GeneralStateTest_stCallCreateCallCodeTest, "GeneralStateTests/stCallCreateCallCodeTest/"}
 	declare_test!{GeneralStateTest_stCallDelegateCodesCallCodeHomestead, "GeneralStateTests/stCallDelegateCodesCallCodeHomestead/"}
 	declare_test!{GeneralStateTest_stCallDelegateCodesHomestead, "GeneralStateTests/stCallDelegateCodesHomestead/"}
 	declare_test!{GeneralStateTest_stChangedEIP150, "GeneralStateTests/stChangedEIP150/"}
@@ -104,6 +107,7 @@ mod state_tests {
 	declare_test!{GeneralStateTest_stDelegatecallTestHomestead, "GeneralStateTests/stDelegatecallTestHomestead/"}
 	declare_test!{GeneralStateTest_stEIP150singleCodeGasPrices, "GeneralStateTests/stEIP150singleCodeGasPrices/"}
 	declare_test!{GeneralStateTest_stEIP150Specific, "GeneralStateTests/stEIP150Specific/"}
+	declare_test!{GeneralStateTest_stEIP158Specific, "GeneralStateTests/stEIP158Specific/"}
 	declare_test!{GeneralStateTest_stExample, "GeneralStateTests/stExample/"}
 	declare_test!{GeneralStateTest_stHomesteadSpecific, "GeneralStateTests/stHomesteadSpecific/"}
 	declare_test!{GeneralStateTest_stInitCodeTest, "GeneralStateTests/stInitCodeTest/"}
@@ -117,15 +121,18 @@ mod state_tests {
 	declare_test!{GeneralStateTest_stRandom, "GeneralStateTests/stRandom/"}
 	declare_test!{GeneralStateTest_stRecursiveCreate, "GeneralStateTests/stRecursiveCreate/"}
 	declare_test!{GeneralStateTest_stRefundTest, "GeneralStateTests/stRefundTest/"}
-	declare_test!{skip => [ "RevertDepthCreateAddressCollision" ], GeneralStateTest_stRevertTest, "GeneralStateTests/stRevertTest/"}
+	declare_test!{GeneralStateTest_stReturnDataTest, "GeneralStateTests/stReturnDataTest/"}
+	declare_test!{GeneralStateTest_stRevertTest, "GeneralStateTests/stRevertTest/"}
 	declare_test!{GeneralStateTest_stSolidityTest, "GeneralStateTests/stSolidityTest/"}
 	declare_test!{GeneralStateTest_stSpecialTest, "GeneralStateTests/stSpecialTest/"}
 	declare_test!{GeneralStateTest_stStackTests, "GeneralStateTests/stStackTests/"}
+	declare_test!{GeneralStateTest_stStaticCall, "GeneralStateTests/stStaticCall/"}
 	declare_test!{GeneralStateTest_stSystemOperationsTest, "GeneralStateTests/stSystemOperationsTest/"}
 	declare_test!{GeneralStateTest_stTransactionTest, "GeneralStateTests/stTransactionTest/"}
 	declare_test!{GeneralStateTest_stTransitionTest, "GeneralStateTests/stTransitionTest/"}
 	declare_test!{GeneralStateTest_stWalletTest, "GeneralStateTests/stWalletTest/"}
 	declare_test!{GeneralStateTest_stZeroCallsRevert, "GeneralStateTests/stZeroCallsRevert/"}
 	declare_test!{GeneralStateTest_stZeroCallsTest, "GeneralStateTests/stZeroCallsTest/"}
+	declare_test!{GeneralStateTest_stZeroKnowledge, "GeneralStateTests/stZeroKnowledge/"}
 }

--- a/ethcore/src/json_tests/transaction.rs
+++ b/ethcore/src/json_tests/transaction.rs
@@ -25,7 +25,7 @@ fn do_json_test(json_data: &[u8]) -> Vec<String> {
 	let mut failed = Vec::new();
 	let frontier_schedule = evm::Schedule::new_frontier();
 	let homestead_schedule = evm::Schedule::new_homestead();
-	let metropolis_schedule = evm::Schedule::new_metropolis();
+	let byzantium_schedule = evm::Schedule::new_byzantium();
 	for (name, test) in tests.into_iter() {
 		let mut fail_unless = |cond: bool, title: &str| if !cond { failed.push(name.clone()); println!("Transaction failed: {:?}: {:?}", name, title); };

@@ -34,7 +34,7 @@ fn do_json_test(json_data: &[u8]) -> Vec<String> {
 			None => &frontier_schedule,
 			Some(x) if x < 1_150_000 => &frontier_schedule,
 			Some(x) if x < 3_000_000 => &homestead_schedule,
-			Some(_) => &metropolis_schedule
+			Some(_) => &byzantium_schedule
 		};
 		let allow_network_id_of_one = number.map_or(false, |n| n >= 2_675_000);
 		let allow_unsigned = number.map_or(false, |n| n >= 3_000_000);
@@ -75,18 +75,13 @@ fn do_json_test(json_data: &[u8]) -> Vec<String> {
 	failed
 }

-declare_test!{TransactionTests_ttTransactionTest, "TransactionTests/ttTransactionTest"}
-declare_test!{heavy => TransactionTests_tt10mbDataField, "TransactionTests/tt10mbDataField"}
-declare_test!{TransactionTests_ttWrongRLPTransaction, "TransactionTests/ttWrongRLPTransaction"}
-declare_test!{TransactionTests_Homestead_ttTransactionTest, "TransactionTests/Homestead/ttTransactionTest"}
-declare_test!{heavy => TransactionTests_Homestead_tt10mbDataField, "TransactionTests/Homestead/tt10mbDataField"}
-declare_test!{TransactionTests_Homestead_ttWrongRLPTransaction, "TransactionTests/Homestead/ttWrongRLPTransaction"}
-declare_test!{TransactionTests_RandomTests_tr201506052141PYTHON, "TransactionTests/RandomTests/tr201506052141PYTHON"}
-declare_test!{TransactionTests_Homestead_ttTransactionTestEip155VitaliksTests, "TransactionTests/Homestead/ttTransactionTestEip155VitaliksTests"}
-declare_test!{TransactionTests_EIP155_ttTransactionTest, "TransactionTests/EIP155/ttTransactionTest"}
-declare_test!{TransactionTests_EIP155_ttTransactionTestEip155VitaliksTests, "TransactionTests/EIP155/ttTransactionTestEip155VitaliksTests"}
-declare_test!{TransactionTests_EIP155_ttTransactionTestVRule, "TransactionTests/EIP155/ttTransactionTestVRule"}
-
-declare_test!{TransactionTests_Metropolis_ttMetropolisTest, "TransactionTests/Metropolis/ttMetropolisTest"}
-declare_test!{TransactionTests_Metropolis_ttTransactionTest, "TransactionTests/Metropolis/ttTransactionTest"}
-declare_test!{TransactionTests_Metropolis_ttTransactionTestZeroSig, "TransactionTests/Metropolis/ttTransactionTestZeroSig"}
+declare_test!{TransactionTests_ttEip155VitaliksHomesead, "TransactionTests/ttEip155VitaliksHomesead"}
+declare_test!{TransactionTests_ttEip155VitaliksEip158, "TransactionTests/ttEip155VitaliksEip158"}
+declare_test!{TransactionTests_ttEip158, "TransactionTests/ttEip158"}
+declare_test!{TransactionTests_ttFrontier, "TransactionTests/ttFrontier"}
+declare_test!{TransactionTests_ttHomestead, "TransactionTests/ttHomestead"}
+declare_test!{TransactionTests_ttVRuleEip158, "TransactionTests/ttVRuleEip158"}
+declare_test!{TransactionTests_ttWrongRLPFrontier, "TransactionTests/ttWrongRLPFrontier"}
+declare_test!{TransactionTests_ttWrongRLPHomestead, "TransactionTests/ttWrongRLPHomestead"}
+declare_test!{TransactionTests_ttConstantinople, "TransactionTests/ttConstantinople"}
+declare_test!{TransactionTests_ttSpecConstantinople, "TransactionTests/ttSpecConstantinople"}
--- a/ethcore/src/miner/miner.rs
+++ b/ethcore/src/miner/miner.rs
@@ -742,8 +742,12 @@ impl MinerService for Miner {
 					state.add_balance(&sender, &(needed_balance - balance), CleanupMode::NoEmpty)
 						.map_err(ExecutionError::from)?;
 				}
-				let options = TransactOptions { tracing: analytics.transaction_tracing, vm_tracing: analytics.vm_tracing, check_nonce: false, output_from_init_contract: true };
-				let mut ret = Executive::new(&mut state, &env_info, &*self.engine).transact(t, options)?;
+				let mut ret = match (analytics.transaction_tracing, analytics.vm_tracing) {
+					(true, true) => Executive::new(&mut state, &env_info, &*self.engine).transact(t, TransactOptions::with_tracing_and_vm_tracing())?,
+					(true, false) => Executive::new(&mut state, &env_info, &*self.engine).transact(t, TransactOptions::with_tracing())?,
+					(false, true) => Executive::new(&mut state, &env_info, &*self.engine).transact(t, TransactOptions::with_vm_tracing())?,
+					(false, false) => Executive::new(&mut state, &env_info, &*self.engine).transact(t, TransactOptions::with_no_tracing())?,
+				};

 				// TODO gav move this into Executive.
 				if let Some(original) = original_state {
--- a/ethcore/src/spec/spec.rs
+++ b/ethcore/src/spec/spec.rs
@@ -59,6 +59,8 @@ pub struct CommonParams {
 	pub fork_block: Option<(BlockNumber, H256)>,
 	/// Number of first block where EIP-98 rules begin.
 	pub eip98_transition: BlockNumber,
+	/// Number of first block where EIP-658 rules begin.
+	pub eip658_transition: BlockNumber,
 	/// Validate block receipts root.
 	pub validate_receipts_transition: u64,
 	/// Number of first block where EIP-86 (Metropolis) rules begin.
@@ -102,7 +104,7 @@ impl CommonParams {
 		schedule.have_static_call = block_number >= self.eip214_transition;
 		schedule.have_return_data = block_number >= self.eip211_transition;
 		if block_number >= self.eip210_transition {
-			schedule.blockhash_gas = 350;
+			schedule.blockhash_gas = 800;
 		}
 		if block_number >= self.dust_protection_transition {
 			schedule.kill_dust = match self.remove_dust_contracts {
@@ -135,6 +137,7 @@ impl From<ethjson::spec::Params> for CommonParams {
 			eip210_contract_gas: p.eip210_contract_gas.map_or(1000000.into(), Into::into),
 			eip211_transition: p.eip211_transition.map_or(BlockNumber::max_value(), Into::into),
 			eip214_transition: p.eip214_transition.map_or(BlockNumber::max_value(), Into::into),
+			eip658_transition: p.eip658_transition.map_or(BlockNumber::max_value(), Into::into),
 			dust_protection_transition: p.dust_protection_transition.map_or(BlockNumber::max_value(), Into::into),
 			nonce_cap_increment: p.nonce_cap_increment.map_or(64, Into::into),
 			remove_dust_contracts: p.remove_dust_contracts.unwrap_or(false),
@@ -187,7 +190,33 @@ pub struct Spec {
 	genesis_state: PodState,
 }

-fn load_from<T: AsRef<Path>>(cache_dir: T, s: ethjson::spec::Spec) -> Result<Spec, Error> {
+#[cfg(test)]
+impl Clone for Spec {
+	fn clone(&self) -> Spec {
+		Spec {
+			name: self.name.clone(),
+			engine: self.engine.clone(),
+			data_dir: self.data_dir.clone(),
+			nodes: self.nodes.clone(),
+			parent_hash: self.parent_hash.clone(),
+			transactions_root: self.transactions_root.clone(),
+			receipts_root: self.receipts_root.clone(),
+			author: self.author.clone(),
+			difficulty: self.difficulty.clone(),
+			gas_limit: self.gas_limit.clone(),
+			gas_used: self.gas_used.clone(),
+			timestamp: self.timestamp.clone(),
+			extra_data: self.extra_data.clone(),
+			seal_rlp: self.seal_rlp.clone(),
+			constructors: self.constructors.clone(),
+			state_root_memo: RwLock::new(*self.state_root_memo.read()),
+			genesis_state: self.genesis_state.clone(),
+		}
+	}
+}
+
+/// Load from JSON object.
+pub fn load_from<T: AsRef<Path>>(cache_dir: T, s: ethjson::spec::Spec) -> Result<Spec, Error> {
 	let builtins = s.accounts.builtins().into_iter().map(|p| (p.0.into(), From::from(p.1))).collect();
 	let g = Genesis::from(s.genesis);
 	let GenericSeal(seal_rlp) = g.seal.into();
--- a/ethcore/src/state/mod.rs
+++ b/ethcore/src/state/mod.rs
@@ -28,7 +28,7 @@ use evm::env_info::EnvInfo;
 use error::Error;
 use executive::{Executive, TransactOptions};
 use factory::Factories;
-use trace::FlatTrace;
+use trace::{self, FlatTrace, VMTrace};
 use pod_account::*;
 use pod_state::{self, PodState};
 use types::basic_account::BasicAccount;
@@ -56,8 +56,12 @@ pub use self::substate::Substate;
 pub struct ApplyOutcome {
 	/// The receipt for the applied transaction.
 	pub receipt: Receipt,
-	/// The trace for the applied transaction, if None if tracing is disabled.
+	/// The output of the applied transaction.
+	pub output: Bytes,
+	/// The trace for the applied transaction, empty if tracing was not produced.
 	pub trace: Vec<FlatTrace>,
+	/// The VM trace for the applied transaction, None if tracing was not produced.
+	pub vm_trace: Option<VMTrace>
 }

 /// Result type for the execution ("application") of a transaction.
@@ -202,7 +206,7 @@ pub fn check_proof(
 		Err(_) => return ProvedExecution::BadProof,
 	};

-	match state.execute(env_info, engine, transaction, false, true) {
+	match state.execute(env_info, engine, transaction, TransactOptions::with_no_tracing(), true) {
 		Ok(executed) => ProvedExecution::Complete(executed),
 		Err(ExecutionError::Internal(_)) => ProvedExecution::BadProof,
 		Err(e) => ProvedExecution::Failed(e),
@@ -287,7 +291,7 @@ const SEC_TRIE_DB_UNWRAP_STR: &'static str = "A state can only be created with v

 impl<B: Backend> State<B> {
 	/// Creates new state with empty state root
-	#[cfg(test)]
+	/// Used for tests.
 	pub fn new(mut db: B, account_start_nonce: U256, factories: Factories) -> State<B> {
 		let mut root = H256::new();
 		{
@@ -451,9 +455,10 @@ impl<B: Backend> State<B> {
 		self.ensure_cached(a, RequireCache::None, false, |a| a.map_or(false, |a| !a.is_null()))
 	}

-	/// Determine whether an account exists and has code.
-	pub fn exists_and_has_code(&self, a: &Address) -> trie::Result<bool> {
-		self.ensure_cached(a, RequireCache::CodeSize, false, |a| a.map_or(false, |a| a.code_size().map_or(false, |size| size != 0)))
+	/// Determine whether an account exists and has code or non-zero nonce.
+	pub fn exists_and_has_code_or_nonce(&self, a: &Address) -> trie::Result<bool> {
+		self.ensure_cached(a, RequireCache::CodeSize, false,
+			|a| a.map_or(false, |a| a.code_hash() != SHA3_EMPTY || *a.nonce() != self.account_start_nonce))
 	}

 	/// Get the balance of account `a`.
@@ -620,29 +625,68 @@ impl<B: Backend> State<B> {
 	/// Execute a given transaction, producing a receipt and an optional trace.
 	/// This will change the state accordingly.
 	pub fn apply(&mut self, env_info: &EnvInfo, engine: &Engine, t: &SignedTransaction, tracing: bool) -> ApplyResult {
-//		let old = self.to_pod();
+		if tracing {
+			let options = TransactOptions::with_tracing();
+			self.apply_with_tracing(env_info, engine, t, options.tracer, options.vm_tracer)
+		} else {
+			let options = TransactOptions::with_no_tracing();
+			self.apply_with_tracing(env_info, engine, t, options.tracer, options.vm_tracer)
+		}
+	}

-		let e = self.execute(env_info, engine, t, tracing, false)?;
-//		trace!("Applied transaction. Diff:\n{}\n", state_diff::diff_pod(&old, &self.to_pod()));
-		let state_root = if env_info.number < engine.params().eip98_transition || env_info.number < engine.params().validate_receipts_transition {
+	/// Execute a given transaction with given tracer and VM tracer producing a receipt and an optional trace.
+	/// This will change the state accordingly.
+	pub fn apply_with_tracing<V, T>(
+		&mut self,
+		env_info: &EnvInfo,
+		engine: &Engine,
+		t: &SignedTransaction,
+		tracer: T,
+		vm_tracer: V,
+	) -> ApplyResult where
+		T: trace::Tracer,
+		V: trace::VMTracer,
+	{
+		let options = TransactOptions::new(tracer, vm_tracer);
+		let e = self.execute(env_info, engine, t, options, false)?;
+
+		let eip658 = env_info.number >= engine.params().eip658_transition;
+		let no_intermediate_commits =
+			eip658 ||
+			(env_info.number >= engine.params().eip98_transition && env_info.number >= engine.params().validate_receipts_transition);
+
+		let state_root = if no_intermediate_commits {
+			None
+		} else {
 			self.commit()?;
 			Some(self.root().clone())
+		};
+
+		let status_byte = if eip658 {
+			Some(if e.exception.is_some() { 0 } else { 1 })
 		} else {
 			None
 		};
-		let receipt = Receipt::new(state_root, e.cumulative_gas_used, e.logs);
+
+		let output = e.output;
+		let receipt = Receipt::new(state_root, status_byte, e.cumulative_gas_used, e.logs);
 		trace!(target: "state", "Transaction receipt: {:?}", receipt);
-		Ok(ApplyOutcome{receipt: receipt, trace: e.trace})
+
+		Ok(ApplyOutcome {
+			receipt,
+			output,
+			trace: e.trace,
+			vm_trace: e.vm_trace,
+		})
 	}

 	// Execute a given transaction without committing changes.
 	//
 	// `virt` signals that we are executing outside of a block set and restrictions like
 	// gas limits and gas costs should be lifted.
-	fn execute(&mut self, env_info: &EnvInfo, engine: &Engine, t: &SignedTransaction, tracing: bool, virt: bool)
-		-> Result<Executed, ExecutionError>
+	fn execute<T, V>(&mut self, env_info: &EnvInfo, engine: &Engine, t: &SignedTransaction, options: TransactOptions<T, V>, virt: bool)
+		-> Result<Executed, ExecutionError> where T: trace::Tracer, V: trace::VMTracer,
 	{
-		let options = TransactOptions { tracing: tracing, vm_tracing: false, check_nonce: true, output_from_init_contract: true };
 		let mut e = Executive::new(self, env_info, engine);

 		match virt {
@@ -727,9 +771,8 @@ impl<B: Backend> State<B> {
 		Ok(())
 	}

-	#[cfg(test)]
-	#[cfg(feature = "json-tests")]
 	/// Populate the state from `accounts`.
+	/// Used for tests.
 	pub fn populate_from(&mut self, accounts: PodState) {
 		assert!(self.checkpoints.borrow().is_empty());
 		for (add, acc) in accounts.drain().into_iter() {
--- a/ethcore/src/tests/client.rs
+++ b/ethcore/src/tests/client.rs
@@ -17,7 +17,7 @@
 use io::IoChannel;
 use client::{BlockChainClient, MiningBlockChainClient, Client, ClientConfig, BlockId};
 use state::{self, State, CleanupMode};
-use executive::Executive;
+use executive::{Executive, TransactOptions};
 use ethereum;
 use block::IsBlock;
 use tests::helpers::*;
@@ -359,7 +359,7 @@ fn transaction_proof() {

 	let mut state = State::from_existing(backend, root, 0.into(), factories.clone()).unwrap();
 	Executive::new(&mut state, &client.latest_env_info(), &*test_spec.engine)
-		.transact(&transaction, Default::default()).unwrap();
+		.transact(&transaction, TransactOptions::with_no_tracing().dont_check_nonce()).unwrap();

 	assert_eq!(state.balance(&Address::default()).unwrap(), 5.into());
 	assert_eq!(state.balance(&address).unwrap(), 95.into());
--- a/ethcore/src/tests/evm.rs
+++ b/ethcore/src/tests/evm.rs
@@ -22,7 +22,7 @@ fn test_blockhash_eip210(factory: Factory) {
 	let test_blockhash_contract = "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";
 	let blockhash_contract_code = Arc::new(test_blockhash_contract.from_hex().unwrap());
 	let blockhash_contract_code_hash = blockhash_contract_code.sha3();
-	let engine = TestEngine::new_metropolis();
+	let engine = TestEngine::new_constantinople();
 	let mut env_info = EnvInfo::default();

 	// populate state with 256 last hashes
--- a/ethcore/src/tests/helpers.rs
+++ b/ethcore/src/tests/helpers.rs
@@ -36,15 +36,6 @@ use transaction::{Action, Transaction, SignedTransaction};
 use rlp::{self, RlpStream};
 use views::BlockView;

-#[cfg(feature = "json-tests")]
-pub enum ChainEra {
-	Frontier,
-	Homestead,
-	Eip150,
-	_Eip161,
-	TransitionTest,
-}
-
 pub struct TestEngine {
 	engine: Arc<Engine>,
 	max_depth: usize,
@@ -58,9 +49,16 @@ impl TestEngine {
 		}
 	}

-	pub fn new_metropolis() -> TestEngine {
+	pub fn new_byzantium() -> TestEngine {
 		TestEngine {
-			engine: ethereum::new_metropolis_test().engine,
+			engine: ethereum::new_byzantium_test().engine,
+			max_depth: 0,
+		}
+	}
+
+	pub fn new_constantinople() -> TestEngine {
+		TestEngine {
+			engine: ethereum::new_constantinople_test().engine,
 			max_depth: 0,
 		}
 	}
@@ -425,5 +423,8 @@ pub fn get_default_ethash_params() -> EthashParams{
 		max_gas_limit: U256::max_value(),
 		min_gas_price_transition: u64::max_value(),
 		min_gas_price: U256::zero(),
+		eip649_transition: u64::max_value(),
+		eip649_delay: 3_000_000,
+		eip649_reward: None,
 	}
 }
--- a/ethcore/src/trace/executive_tracer.rs
+++ b/ethcore/src/trace/executive_tracer.rs
@@ -167,7 +167,7 @@ impl Tracer for ExecutiveTracer {
 		ExecutiveTracer::default()
 	}

-	fn traces(self) -> Vec<FlatTrace> {
+	fn drain(self) -> Vec<FlatTrace> {
 		self.traces
 	}
 }
--- a/ethcore/src/trace/mod.rs
+++ b/ethcore/src/trace/mod.rs
@@ -85,7 +85,7 @@ pub trait Tracer: Send {
 	fn subtracer(&self) -> Self where Self: Sized;

 	/// Consumes self and returns all traces.
-	fn traces(self) -> Vec<FlatTrace>;
+	fn drain(self) -> Vec<FlatTrace>;
 }

 /// Used by executive to build VM traces.
--- a/ethcore/src/trace/noop_tracer.rs
+++ b/ethcore/src/trace/noop_tracer.rs
@@ -62,7 +62,7 @@ impl Tracer for NoopTracer {
 		NoopTracer
 	}

-	fn traces(self) -> Vec<FlatTrace> {
+	fn drain(self) -> Vec<FlatTrace> {
 		vec![]
 	}
 }
--- a/ethcore/src/trace/types/error.rs
+++ b/ethcore/src/trace/types/error.rs
@@ -43,6 +43,10 @@ pub enum Error {
 	MutableCallInStaticContext,
 	/// Wasm error
 	Wasm,
+	/// Contract tried to access past the return data buffer.
+	OutOfBounds,
+	/// Execution has been reverted with REVERT instruction.
+	Reverted,
 }

 impl<'a> From<&'a EvmError> for Error {
@@ -57,6 +61,8 @@ impl<'a> From<&'a EvmError> for Error {
 			EvmError::Wasm { .. } => Error::Wasm,
 			EvmError::Internal(_) => Error::Internal,
 			EvmError::MutableCallInStaticContext => Error::MutableCallInStaticContext,
+			EvmError::OutOfBounds => Error::OutOfBounds,
+			EvmError::Reverted => Error::Reverted,
 		}
 	}
 }
@@ -80,6 +86,8 @@ impl fmt::Display for Error {
 			Wasm => "Wasm runtime error",
 			Internal => "Internal error",
 			MutableCallInStaticContext => "Mutable Call In Static Context",
+			OutOfBounds => "Out of bounds",
+			Reverted => "Reverted",
 		};
 		message.fmt(f)
 	}
@@ -98,6 +106,8 @@ impl Encodable for Error {
 			BuiltIn => 6,
 			MutableCallInStaticContext => 7,
 			Wasm => 8,
+			OutOfBounds => 9,
+			Reverted => 10,
 		};

 		s.append_internal(&value);
@@ -118,6 +128,8 @@ impl Decodable for Error {
 			6 => Ok(BuiltIn),
 			7 => Ok(MutableCallInStaticContext),
 			8 => Ok(Wasm),
+			9 => Ok(OutOfBounds),
+			10 => Ok(Reverted),
 			_ => Err(DecoderError::Custom("Invalid error type")),
 		}
 	}