Merge pull request #96 from gavofyork/gav

State testing framework. First test is failing.

src/account.rs

@@ -2,8 +2,19 @@ use util::*;
 
 pub const SHA3_EMPTY: H256 = H256( [0xc5, 0xd2, 0x46, 0x01, 0x86, 0xf7, 0x23, 0x3c, 0x92, 0x7e, 0x7d, 0xb2, 0xdc, 0xc7, 0x03, 0xc0, 0xe5, 0x00, 0xb6, 0x53, 0xca, 0x82, 0x27, 0x3b, 0x7b, 0xfa, 0xd8, 0x04, 0x5d, 0x85, 0xa4, 0x70] );
 
-/// Single account in the system.
 #[derive(Debug)]
+/// Genesis account data. Does not have a DB overlay cache.
+pub struct PodAccount {
+	// Balance of the account.
+	pub balance: U256,
+	// Nonce of the account.
+	pub nonce: U256,
+	pub code: Bytes,
+	pub storage: BTreeMap<H256, H256>,
+}
+
+/// Single account in the system.
+#[derive(Clone)]
 pub struct Account {
 	// Balance of the account.
 	balance: U256,
@@ -19,6 +30,29 @@ pub struct Account {
 	code_cache: Bytes,
 }
 
+impl PodAccount {
+	/// Convert Account to a PodAccount.
+	/// NOTE: This will silently fail unless the account is fully cached.
+	pub fn from_account(acc: &Account) -> PodAccount {
+		PodAccount {
+			balance: acc.balance.clone(),
+			nonce: acc.nonce.clone(),
+			storage: acc.storage_overlay.borrow().iter().fold(BTreeMap::new(), |mut m, (k, v)| {m.insert(k.clone(), v.clone()); m}),
+			code: acc.code_cache.clone()
+		}
+	}
+
+	pub fn rlp(&self) -> Bytes {
+		let mut stream = RlpStream::new_list(4);
+		stream.append(&self.nonce);
+		stream.append(&self.balance);
+		// TODO.
+		stream.append(&SHA3_NULL_RLP);
+		stream.append(&self.code.sha3());
+		stream.out()
+	}
+}
+
 impl Account {
 	/// General constructor.
 	pub fn new(balance: U256, nonce: U256, storage: HashMap<H256, H256>, code: Bytes) -> Account {
@@ -32,6 +66,18 @@ impl Account {
 		}
 	}
 
+	/// General constructor.
+	pub fn from_pod(pod: PodAccount) -> Account {
+		Account {
+			balance: pod.balance,
+			nonce: pod.nonce,
+			storage_root: SHA3_NULL_RLP,
+			storage_overlay: RefCell::new(pod.storage.into_iter().fold(HashMap::new(), |mut m, (k, v)| {m.insert(k, v); m})),
+			code_hash: Some(pod.code.sha3()),
+			code_cache: pod.code
+		}
+	}
+
 	/// Create a new account with the given balance.
 	pub fn new_basic(balance: U256, nonce: U256) -> Account {
 		Account {
@@ -205,6 +251,12 @@ impl Account {
 	}
 }
 
+impl fmt::Debug for Account {
+	fn fmt(&self, f: &mut fmt::Formatter) -> fmt::Result {
+		write!(f, "{:?}", PodAccount::from_account(self))
+	}
+}
+
 #[cfg(test)]
 mod tests {
 

src/env_info.rs

@@ -6,6 +6,7 @@ use header::BlockNumber;
 pub type LastHashes = Vec<H256>;
 
 /// Information concerning the execution environment for a message-call/contract-creation.
+#[derive(Debug)]
 pub struct EnvInfo {
 	/// The block number.
 	pub number: BlockNumber,
@@ -35,6 +36,18 @@ impl EnvInfo {
 			gas_used: U256::zero()
 		}
 	}
+
+	pub fn from_json(json: &Json) -> EnvInfo {
+		EnvInfo {
+			number: u64_from_json(&json["currentNumber"]),
+			author: address_from_json(&json["currentCoinbase"]),
+			difficulty: u256_from_json(&json["currentDifficulty"]),
+			gas_limit: u256_from_json(&json["currentGasLimit"]),
+			timestamp: u64_from_json(&json["currentTimestamp"]),
+			last_hashes: vec![h256_from_json(&json["previousHash"])],
+			gas_used: U256::zero(),
+		}
+	}
 }
 
 /// TODO: it should be the other way around.

src/state.rs

@@ -5,6 +5,7 @@ use executive::Executive;
 pub type ApplyResult = Result<Receipt, Error>;
 
 /// Representation of the entire state of all accounts in the system.
+#[derive(Clone)]
 pub struct State {
 	db: OverlayDB,
 	root: H256,
@@ -179,9 +180,33 @@ impl State {
 		self.root = Self::commit_into(&mut self.db, r, self.cache.borrow_mut().deref_mut());
 	}
 
-	/// Populate the state from `accounts`. Just uses `commit_into`.
-	pub fn populate_from(&mut self, _accounts: &mut HashMap<Address, Option<Account>>) {
-		unimplemented!();
+	/// Populate the state from `accounts`.
+	pub fn populate_from(&mut self, accounts: BTreeMap<Address, PodAccount>) {
+		for (add, acc) in accounts.into_iter() {
+			self.cache.borrow_mut().insert(add, Some(Account::from_pod(acc)));
+		}
+	}
+
+	/// Populate a PodAccount map from this state.
+	pub fn to_hashmap_pod(&self) -> HashMap<Address, PodAccount> {
+		// TODO: handle database rather than just the cache.
+		self.cache.borrow().iter().fold(HashMap::new(), |mut m, (add, opt)| {
+			if let &Some(ref acc) = opt {
+				m.insert(add.clone(), PodAccount::from_account(acc));
+			}
+			m
+		})
+	}
+
+	/// Populate a PodAccount map from this state.
+	pub fn to_pod_map(&self) -> BTreeMap<Address, PodAccount> {
+		// TODO: handle database rather than just the cache.
+		self.cache.borrow().iter().fold(BTreeMap::new(), |mut m, (add, opt)| {
+			if let &Some(ref acc) = opt {
+				m.insert(add.clone(), PodAccount::from_account(acc));
+			}
+			m
+		})
 	}
 
 	/// Pull account `a` in our cache from the trie DB and return it.
@@ -224,9 +249,9 @@ impl State {
 	}
 }
 
-impl Clone for State {
-	fn clone(&self) -> Self {
-		State::from_existing(self.db.clone(), self.root.clone(), self.account_start_nonce.clone())
+impl fmt::Debug for State {
+	fn fmt(&self, f: &mut fmt::Formatter) -> fmt::Result {
+		write!(f, "{:?}", self.cache.borrow())
 	}
 }
 

src/tests/mod.rs

@@ -2,3 +2,4 @@
 mod test_common;
 
 mod transaction;
+mod state;

src/tests/state.rs

@@ -0,0 +1,80 @@
+use super::test_common::*;
+use state::*;
+use ethereum;
+
+pub fn hashmap_h256_h256_from_json(json: &Json) -> HashMap<H256, H256> {
+	json.as_object().unwrap().iter().fold(HashMap::new(), |mut m, (key, value)| {
+		m.insert(H256::from(&u256_from_hex(key)), H256::from(&u256_from_json(value)));
+		m
+	})
+}
+
+pub fn map_h256_h256_from_json(json: &Json) -> BTreeMap<H256, H256> {
+	json.as_object().unwrap().iter().fold(BTreeMap::new(), |mut m, (key, value)| {
+		m.insert(H256::from(&u256_from_hex(key)), H256::from(&u256_from_json(value)));
+		m
+	})
+}
+
+/// Translate the JSON object into a hash map of account information ready for insertion into State.
+pub fn pod_map_from_json(json: &Json) -> BTreeMap<Address, PodAccount> {
+	json.as_object().unwrap().iter().fold(BTreeMap::new(), |mut state, (address, acc)| {
+		let balance = acc.find("balance").map(&u256_from_json);
+		let nonce = acc.find("nonce").map(&u256_from_json);
+		let storage = acc.find("storage").map(&map_h256_h256_from_json);;
+		let code = acc.find("code").map(&bytes_from_json);
+		if balance.is_some() || nonce.is_some() || storage.is_some() || code.is_some() {
+			state.insert(address_from_hex(address), PodAccount{
+				balance: balance.unwrap_or(U256::zero()),
+				nonce: nonce.unwrap_or(U256::zero()),
+				storage: storage.unwrap_or(BTreeMap::new()),
+				code: code.unwrap_or(Vec::new())
+			});
+		}
+		state
+	})
+}
+
+fn do_json_test(json_data: &[u8]) -> Vec<String> {
+	let json = Json::from_str(::std::str::from_utf8(json_data).unwrap()).expect("Json is invalid");
+	let mut failed = Vec::new();
+
+	let engine = ethereum::new_frontier_test().to_engine().unwrap();
+
+	for (name, test) in json.as_object().unwrap() {
+		let mut fail = false;
+		let mut fail_unless = |cond: bool| if !cond && !fail { failed.push(name.to_string()); fail = true; true } else {false};
+
+		let t = Transaction::from_json(&test["transaction"]);
+		let env = EnvInfo::from_json(&test["env"]);
+		let out = bytes_from_json(&test["out"]);
+		let post_state_root = h256_from_json(&test["postStateRoot"]);
+		let pre = pod_map_from_json(&test["pre"]);
+		let post = pod_map_from_json(&test["post"]);
+		// TODO: read test["logs"]
+
+		println!("Transaction: {:?}", t);
+		println!("Env: {:?}", env);
+		println!("Out: {:?}", out);
+		println!("Pre: {:?}", pre);
+		println!("Post: {:?}", post);
+
+		let mut s = State::new_temp();
+		s.populate_from(pre);
+		s.apply(&env, engine.deref(), &t).unwrap();
+		let our_post = s.to_pod_map();
+
+		if fail_unless(s.root() == &post_state_root) {
+			println!("EXPECTED:\n{:?}", post);
+			println!("GOT:\n{:?}", our_post);
+		}
+
+		// TODO: Compare logs.
+	}
+	for f in failed.iter() {
+		println!("FAILED: {:?}", f);
+	}
+	failed
+}
+
+declare_test!{StateTests_stExample, "StateTests/stExample"}

src/tests/test_common.rs

@@ -1,43 +1,5 @@
 pub use common::*;
 
-pub fn clean(s: &str) -> &str {
-	if s.len() >= 2 && &s[0..2] == "0x" {
-		&s[2..]
-	} else {
-		s
-	}
-}
-
-pub fn bytes_from_json(json: &Json) -> Bytes {
-	let s = json.as_string().unwrap();
-	if s.len() % 2 == 1 {
-		FromHex::from_hex(&("0".to_string() + &(clean(s).to_string()))[..]).unwrap_or(vec![])
-	} else {
-		FromHex::from_hex(clean(s)).unwrap_or(vec![])
-	}
-}
-
-pub fn address_from_json(json: &Json) -> Address {
-	let s = json.as_string().unwrap();
-	if s.len() % 2 == 1 {
-		address_from_hex(&("0".to_string() + &(clean(s).to_string()))[..])
-	} else {
-		address_from_hex(clean(s))
-	}
-}
-
-pub fn u256_from_json(json: &Json) -> U256 {
-	let s = json.as_string().unwrap();
-	if s.len() >= 2 && &s[0..2] == "0x" {
-		// hex
-		U256::from_str(&s[2..]).unwrap()
-	}
-	else {
-		// dec
-		U256::from_dec_str(s).unwrap()
-	}
-}
-
 #[macro_export]
 macro_rules! declare_test {
 	($id: ident, $name: expr) => {

src/tests/transaction.rs

@@ -6,15 +6,16 @@ fn do_json_test(json_data: &[u8]) -> Vec<String> {
 	let mut failed = Vec::new();
 	let old_schedule = evm::Schedule::new_frontier();
 	let new_schedule = evm::Schedule::new_homestead();
+	let ot = RefCell::new(Transaction::new());
 	for (name, test) in json.as_object().unwrap() {
 		let mut fail = false;
-		let mut fail_unless = |cond: bool| if !cond && fail { failed.push(name.to_string()); fail = true };
+		let mut fail_unless = |cond: bool| if !cond && !fail { failed.push(name.to_string()); println!("Transaction: {:?}", ot.borrow()); fail = true };
 		let schedule = match test.find("blocknumber")
 			.and_then(|j| j.as_string())
 			.and_then(|s| BlockNumber::from_str(s).ok())
 			.unwrap_or(0) { x if x < 900000 => &old_schedule, _ => &new_schedule };
 		let rlp = bytes_from_json(&test["rlp"]);
-		let res = UntrustedRlp::new(&rlp).as_val().map_err(|e| From::from(e)).and_then(|t: Transaction| t.validate(schedule));
+		let res = UntrustedRlp::new(&rlp).as_val().map_err(|e| From::from(e)).and_then(|t: Transaction| t.validate(schedule, schedule.have_delegate_call));
 		fail_unless(test.find("transaction").is_none() == res.is_err());
 		if let (Some(&Json::Object(ref tx)), Some(&Json::String(ref expect_sender))) = (test.find("transaction"), test.find("sender")) {
 			let t = res.unwrap();
@@ -25,8 +26,10 @@ fn do_json_test(json_data: &[u8]) -> Vec<String> {
 			fail_unless(t.nonce == u256_from_json(&tx["nonce"]));
 			fail_unless(t.value == u256_from_json(&tx["value"]));
 			if let Action::Call(ref to) = t.action {
+				*ot.borrow_mut() = t.clone();
 				fail_unless(to == &address_from_json(&tx["to"]));
 			} else {
+				*ot.borrow_mut() = t.clone();
 				fail_unless(bytes_from_json(&tx["to"]).len() == 0);
 			}
 		}

src/transaction.rs

@@ -3,6 +3,7 @@ use basic_types::*;
 use error::*;
 use evm::Schedule;
 
+#[derive(Debug,Clone)]
 pub enum Action {
 	Create,
 	Call(Address),
@@ -10,6 +11,7 @@ pub enum Action {
 
 /// A set of information describing an externally-originating message call
 /// or contract creation operation.
+#[derive(Debug,Clone)]
 pub struct Transaction {
 	pub nonce: U256,
 	pub gas_price: U256,
@@ -28,6 +30,21 @@ pub struct Transaction {
 }
 
 impl Transaction {
+	pub fn new() -> Self {
+		Transaction {
+			nonce: U256::zero(),
+			gas_price: U256::zero(),
+			gas: U256::zero(),
+			action: Action::Create,
+			value: U256::zero(),
+			data: vec![],
+			v: 0,
+			r: U256::zero(),
+			s: U256::zero(),
+			hash: RefCell::new(None),
+			sender: RefCell::new(None),
+		}
+	}
 	/// Create a new message-call transaction.
 	pub fn new_call(to: Address, value: U256, data: Bytes, gas: U256, gas_price: U256, nonce: U256) -> Transaction {
 		Transaction {
@@ -62,6 +79,32 @@ impl Transaction {
 		}
 	}
 
+	pub fn from_json(json: &Json) -> Transaction {
+		let mut r = Transaction {
+			nonce: u256_from_json(&json["nonce"]),
+			gas_price: u256_from_json(&json["gasPrice"]),
+			gas: u256_from_json(&json["gasLimit"]),
+			action: match bytes_from_json(&json["to"]) {
+				ref x if x.len() == 0 => Action::Create,
+				ref x => Action::Call(Address::from_slice(x)),
+			},
+			value: u256_from_json(&json["value"]),
+			data: bytes_from_json(&json["data"]),
+			v: match json.find("v") { Some(ref j) => u8_from_json(j), None => 0 },
+			r: match json.find("r") { Some(ref j) => u256_from_json(j), None => U256::zero() },
+			s: match json.find("s") { Some(ref j) => u256_from_json(j), None => U256::zero() },
+			hash: RefCell::new(None),
+			sender: match json.find("sender") {
+				Some(&Json::String(ref sender)) => RefCell::new(Some(address_from_hex(clean(sender)))),
+				_ => RefCell::new(None),
+			},
+		};
+		if let Some(&Json::String(ref secret_key)) = json.find("secretKey") {
+			r.sign(&h256_from_hex(clean(secret_key)));
+		}
+		r
+	}
+
 	/// Get the nonce of the transaction.
 	pub fn nonce(&self) -> &U256 { &self.nonce }
 	/// Get the gas price of the transaction.
@@ -146,6 +189,7 @@ impl Transaction {
 
 	/// Signs the transaction as coming from `sender`.
 	pub fn sign(&mut self, secret: &Secret) {
+		// TODO: make always low.
 		let sig = ec::sign(secret, &self.message_hash());
 		let (r, s, v) = sig.unwrap().to_rsv();
 		self.r = r;
@@ -170,7 +214,10 @@ impl Transaction {
 	}
 
 	/// Do basic validation, checking for valid signature and minimum gas,
-	pub fn validate(self, schedule: &Schedule) -> Result<Transaction, Error> {
+	pub fn validate(self, schedule: &Schedule, require_low: bool) -> Result<Transaction, Error> {
+		if require_low && !ec::is_low_s(&self.s) {
+			return Err(Error::Util(UtilError::Crypto(CryptoError::InvalidSignature)));
+		}
 		try!(self.sender());
 		if self.gas < U256::from(self.gas_required(&schedule)) {
 			Err(From::from(TransactionError::InvalidGasLimit(OutOfBounds{min: Some(U256::from(self.gas_required(&schedule))), max: None, found: self.gas})))