ethabi version 5 (#7723)

* Refactor updater to use ethabi-derive

* Grumble: do_call type alias

* Empty commit to trigger test re-run

* migration to ethabi-5.0

* migration to ethabi-5.0 in progress

* use ethabi_deriven to generate TransactAcl contract

* use ethabi_deriven to generate Registry contract

* hash-fetch uses ethabi_derive, removed retain cycle from updater, fixed #7720

* node-filter crate uses ethabi_derive to generate peer_set contract interface

* use LruCache in node-filter instead of HashMap

* validator_set engine uses ethabi_derive

* ethcore does not depend on native_contracts

* miner does no depend on native_contracts

* secret_store does not use native_contracts (in progress)

* removed native-contracts

* ethcore and updater does not depend on futures

* updated ethereum-types

* fixed all warnings caused by using new version of ethereum-types

* updated ethabi_derive && ethabi_contract to get rid of warnings

* removed another retain cycle in updater, fixed following minor version on update

* moved contracts out of native_contracts res

* updated ethabi_contract

* fixed failing test

* fixed failing test

* there is no need to create two contracts of the same kind any more

* simplify updater::ReleaseTrack conversion into u8 and add several tests for it

* applied review suggestions

* applied review suggestions

Cargo.toml

@@ -45,7 +45,7 @@ ethcore-miner = { path = "miner" }
 ethcore-network = { path = "util/network" }
 ethcore-stratum = { path = "stratum" }
 ethcore-transaction = { path = "ethcore/transaction" }
-ethereum-types = "0.1"
+ethereum-types = "0.2"
 node-filter = { path = "ethcore/node_filter" }
 ethkey = { path = "ethkey" }
 node-health = { path = "dapps/node-health" }

dapps/Cargo.toml

@@ -16,7 +16,7 @@ log = "0.3"
 parity-dapps-glue = "1.9"
 parking_lot = "0.5"
 mime_guess = "2.0.0-alpha.2"
-rand = "0.3"
+rand = "0.4"
 rustc-hex = "1.0"
 serde = "1.0"
 serde_derive = "1.0"
@@ -29,7 +29,7 @@ jsonrpc-core = { git = "https://github.com/paritytech/jsonrpc.git", branch = "pa
 jsonrpc-http-server = { git = "https://github.com/paritytech/jsonrpc.git", branch = "parity-1.10" }
 
 ethcore-bytes = { path = "../util/bytes" }
-ethereum-types = "0.1"
+ethereum-types = "0.2"
 fetch = { path = "../util/fetch" }
 node-health = { path = "./node-health" }
 parity-hash-fetch = { path = "../hash-fetch" }

dapps/src/apps/fetcher/mod.rs

@@ -23,7 +23,6 @@ mod installers;
 use std::{fs, env};
 use std::path::PathBuf;
 use std::sync::Arc;
-use rustc_hex::FromHex;
 use futures::{future, Future};
 use futures_cpupool::CpuPool;
 use fetch::{Client as FetchClient, Fetch};
@@ -31,6 +30,7 @@ use hash_fetch::urlhint::{URLHintContract, URLHint, URLHintResult};
 
 use hyper::StatusCode;
 
+use ethereum_types::H256;
 use {Embeddable, SyncStatus, random_filename};
 use parking_lot::Mutex;
 use page::local;
@@ -132,7 +132,7 @@ impl<R: URLHint + 'static, F: Fetch> ContentFetcher<F, R> {
 
 	// resolve contract call synchronously.
 	// TODO: port to futures-based hyper and make it all async.
-	fn resolve(&self, content_id: Vec<u8>) -> Option<URLHintResult> {
+	fn resolve(&self, content_id: H256) -> Option<URLHintResult> {
 		self.resolver.resolve(content_id)
 			.wait()
 			.unwrap_or_else(|e| { warn!("Error resolving content-id: {}", e); None })
@@ -149,7 +149,7 @@ impl<R: URLHint + 'static, F: Fetch> Fetcher for ContentFetcher<F, R> {
 			}
 		}
 		// fallback to resolver
-		if let Ok(content_id) = content_id.from_hex() {
+		if let Ok(content_id) = content_id.parse() {
 			// if there is content or we are syncing return true
 			self.sync.is_major_importing() || self.resolve(content_id).is_some()
 		} else {
@@ -178,7 +178,7 @@ impl<R: URLHint + 'static, F: Fetch> Endpoint for ContentFetcher<F, R> {
 				// We need to start fetching the content
 				_ => {
 					trace!(target: "dapps", "Content unavailable. Fetching... {:?}", content_id);
-					let content_hex = content_id.from_hex().expect("to_handler is called only when `contains` returns true.");
+					let content_hex = content_id.parse().expect("to_handler is called only when `contains` returns true.");
 					let content = self.resolve(content_hex);
 
 					let cache = self.cache.clone();
@@ -280,10 +280,10 @@ impl<R: URLHint + 'static, F: Fetch> Endpoint for ContentFetcher<F, R> {
 mod tests {
 	use std::env;
 	use std::sync::Arc;
-	use bytes::Bytes;
 	use fetch::{Fetch, Client};
-	use futures::future;
+	use futures::{future, Future};
-	use hash_fetch::urlhint::{URLHint, URLHintResult, BoxFuture};
+	use hash_fetch::urlhint::{URLHint, URLHintResult};
+	use ethereum_types::H256;
 
 	use apps::cache::ContentStatus;
 	use endpoint::EndpointInfo;
@@ -294,7 +294,7 @@ mod tests {
 	#[derive(Clone)]
 	struct FakeResolver;
 	impl URLHint for FakeResolver {
-		fn resolve(&self, _id: Bytes) -> BoxFuture<Option<URLHintResult>, String> {
+		fn resolve(&self, _id: H256) -> Box<Future<Item = Option<URLHintResult>, Error = String> + Send> {
 			Box::new(future::ok(None))
 		}
 	}

dapps/src/tests/helpers/registrar.rs

@@ -18,9 +18,10 @@ use std::str;
 use std::sync::Arc;
 use std::collections::HashMap;
 
+use futures::Future;
 use ethereum_types::{H256, Address};
 use bytes::{Bytes, ToPretty};
-use hash_fetch::urlhint::{ContractClient, BoxFuture};
+use hash_fetch::urlhint::ContractClient;
 use parking_lot::Mutex;
 use rustc_hex::FromHex;
 
@@ -66,7 +67,7 @@ impl ContractClient for FakeRegistrar {
 		Ok(REGISTRAR.parse().unwrap())
 	}
 
-	fn call(&self, address: Address, data: Bytes) -> BoxFuture<Bytes, String> {
+	fn call(&self, address: Address, data: Bytes) -> Box<Future<Item = Bytes, Error = String> + Send> {
 		let call = (address.to_hex(), data.to_hex());
 		self.calls.lock().push(call.clone());
 		let res = self.responses.lock().get(&call).cloned().expect(&format!("No response for call: {:?}", call));

ethcore/Cargo.toml

@@ -24,27 +24,28 @@ ethcore-logger = { path = "../logger" }
 ethcore-miner = { path = "../miner" }
 ethcore-stratum = { path = "../stratum" }
 ethcore-transaction = { path = "./transaction" }
-ethereum-types = "0.1"
+ethereum-types = "0.2"
 memory-cache = { path = "../util/memory_cache" }
+ethabi = "5.1"
+ethabi-derive = "5.0"
+ethabi-contract = "5.0"
 ethjson = { path = "../json" }
 ethkey = { path = "../ethkey" }
 ethstore = { path = "../ethstore" }
 evm = { path = "evm" }
-futures = "0.1"
 hardware-wallet = { path = "../hw" }
 heapsize = "0.4"
 itertools = "0.5"
 lazy_static = "1.0"
 log = "0.3"
 lru-cache = "0.1"
-native-contracts = { path = "native_contracts" }
 num = "0.1"
 num_cpus = "1.2"
 parity-machine = { path = "../machine" }
 parking_lot = "0.5"
 price-info = { path = "../price-info" }
 rayon = "0.8"
-rand = "0.3"
+rand = "0.4"
 rlp = { path = "../util/rlp" }
 rlp_derive = { path = "../util/rlp_derive" }
 kvdb = { path = "../util/kvdb" }
@@ -69,9 +70,6 @@ unexpected = { path = "../util/unexpected" }
 journaldb = { path = "../util/journaldb" }
 tempdir = "0.3"
 
-[dev-dependencies]
-native-contracts = { path = "native_contracts", features = ["test_contracts"] }
-
 [features]
 jit = ["evm/jit"]
 evm-debug = ["slow-blocks"]

ethcore/evm/Cargo.toml

@@ -5,7 +5,7 @@ authors = ["Parity Technologies <admin@parity.io>"]
 
 [dependencies]
 bit-set = "0.4"
-ethereum-types = "0.1"
+ethereum-types = "0.2"
 evmjit = { path = "../../evmjit", optional = true }
 heapsize = "0.4"
 lazy_static = "1.0"

ethcore/light/Cargo.toml

@@ -11,7 +11,7 @@ log = "0.3"
 ethcore = { path = ".."}
 ethcore-bytes = { path = "../../util/bytes" }
 ethcore-transaction = { path = "../transaction" }
-ethereum-types = "0.1"
+ethereum-types = "0.2"
 memorydb = { path = "../../util/memorydb" }
 patricia-trie = { path = "../../util/patricia_trie" }
 ethcore-network = { path = "../../util/network" }
@@ -26,7 +26,7 @@ rlp_derive = { path = "../../util/rlp_derive" }
 time = "0.1"
 smallvec = "0.4"
 futures = "0.1"
-rand = "0.3"
+rand = "0.4"
 itertools = "0.5"
 bincode = "0.8.0"
 serde = "1.0"

ethcore/light/src/client/header_chain.rs

@@ -724,6 +724,7 @@ mod tests {
 	use super::HeaderChain;
 	use std::sync::Arc;
 
+	use ethereum_types::U256;
 	use ethcore::ids::BlockId;
 	use ethcore::header::Header;
 	use ethcore::spec::Spec;
@@ -755,7 +756,7 @@ mod tests {
 			header.set_parent_hash(parent_hash);
 			header.set_number(i);
 			header.set_timestamp(rolling_timestamp);
-			header.set_difficulty(*genesis_header.difficulty() * i.into());
+			header.set_difficulty(*genesis_header.difficulty() * i as u32);
 			parent_hash = header.hash();
 
 			let mut tx = db.transaction();
@@ -788,7 +789,7 @@ mod tests {
 			header.set_parent_hash(parent_hash);
 			header.set_number(i);
 			header.set_timestamp(rolling_timestamp);
-			header.set_difficulty(*genesis_header.difficulty() * i.into());
+			header.set_difficulty(*genesis_header.difficulty() * i as u32);
 			parent_hash = header.hash();
 
 			let mut tx = db.transaction();
@@ -807,7 +808,7 @@ mod tests {
 				header.set_parent_hash(parent_hash);
 				header.set_number(i);
 				header.set_timestamp(rolling_timestamp);
-				header.set_difficulty(*genesis_header.difficulty() * i.into());
+				header.set_difficulty(*genesis_header.difficulty() * i as u32);
 				parent_hash = header.hash();
 
 				let mut tx = db.transaction();
@@ -831,7 +832,7 @@ mod tests {
 				header.set_parent_hash(parent_hash);
 				header.set_number(i);
 				header.set_timestamp(rolling_timestamp);
-				header.set_difficulty(*genesis_header.difficulty() * (i * i).into());
+				header.set_difficulty(*genesis_header.difficulty() * U256::from(i * i));
 				parent_hash = header.hash();
 
 				let mut tx = db.transaction();
@@ -884,7 +885,7 @@ mod tests {
 				header.set_parent_hash(parent_hash);
 				header.set_number(i);
 				header.set_timestamp(rolling_timestamp);
-				header.set_difficulty(*genesis_header.difficulty() * i.into());
+				header.set_difficulty(*genesis_header.difficulty() * i as u32);
 				parent_hash = header.hash();
 
 				let mut tx = db.transaction();
@@ -922,7 +923,7 @@ mod tests {
 				header.set_parent_hash(parent_hash);
 				header.set_number(i);
 				header.set_timestamp(rolling_timestamp);
-				header.set_difficulty(*genesis_header.difficulty() * i.into());
+				header.set_difficulty(*genesis_header.difficulty() * i as u32);
 				parent_hash = header.hash();
 
 				let mut tx = db.transaction();
@@ -939,7 +940,7 @@ mod tests {
 				header.set_parent_hash(parent_hash);
 				header.set_number(i);
 				header.set_timestamp(rolling_timestamp);
-				header.set_difficulty(*genesis_header.difficulty() * i.into() * 1000.into());
+				header.set_difficulty(*genesis_header.difficulty() * U256::from(i as u32 * 1000u32));
 				parent_hash = header.hash();
 
 				let mut tx = db.transaction();
@@ -989,7 +990,7 @@ mod tests {
 			header.set_parent_hash(parent_hash);
 			header.set_number(i);
 			header.set_timestamp(rolling_timestamp);
-			header.set_difficulty(*genesis_header.difficulty() * i.into());
+			header.set_difficulty(*genesis_header.difficulty() * i as u32);
 			parent_hash = header.hash();
 
 			let mut tx = db.transaction();
@@ -1023,7 +1024,7 @@ mod tests {
 			header.set_parent_hash(parent_hash);
 			header.set_number(i);
 			header.set_timestamp(rolling_timestamp);
-			header.set_difficulty(*genesis_header.difficulty() * i.into());
+			header.set_difficulty(*genesis_header.difficulty() * i as u32);
 			parent_hash = header.hash();
 
 			let mut tx = db.transaction();

ethcore/light/src/net/request_credits.rs

@@ -320,7 +320,7 @@ impl FlowParams {
 	/// and number of requests made.
 	pub fn compute_cost(&self, request: &Request) -> Option<U256> {
 		match *request {
-			Request::Headers(ref req) => self.costs.headers.map(|c| c * req.max.into()),
+			Request::Headers(ref req) => self.costs.headers.map(|c| c * U256::from(req.max)),
 			Request::HeaderProof(_) => self.costs.header_proof,
 			Request::TransactionIndex(_) => self.costs.transaction_index,
 			Request::Body(_) => self.costs.body,
@@ -444,6 +444,6 @@ mod tests {
 		);
 
 		assert_eq!(flow_params2.costs, flow_params3.costs);
-		assert_eq!(flow_params.costs.headers.unwrap(), flow_params2.costs.headers.unwrap() * 2.into());
+		assert_eq!(flow_params.costs.headers.unwrap(), flow_params2.costs.headers.unwrap() * 2u32);
 	}
 }

ethcore/migrations/Cargo.toml

@@ -5,7 +5,7 @@ authors = ["Parity Technologies <admin@parity.io>"]
 
 [dependencies]
 ethcore-bytes = { path = "../../util/bytes" }
-ethereum-types = "0.1.4"
+ethereum-types = "0.2"
 keccak-hash = { path = "../../util/hash" }
 kvdb = { path = "../../util/kvdb" }
 kvdb-rocksdb = { path = "../../util/kvdb-rocksdb" }

ethcore/native_contracts/Cargo.toml

@@ -1,19 +0,0 @@
-[package]
-name = "native-contracts"
-description = "Generated Rust code for Ethereum contract ABIs"
-version = "0.1.0"
-authors = ["Parity Technologies <admin@parity.io>"]
-build = "build.rs"
-
-[dependencies]
-ethabi = "4.0"
-futures = "0.1"
-byteorder = "1.0"
-ethereum-types = "0.1"
-
-[build-dependencies]
-native-contract-generator = { path = "generator" }
-
-[features]
-default = []
-test_contracts = []

ethcore/native_contracts/build.rs

@@ -1,64 +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/>.
-
-extern crate native_contract_generator;
-
-use std::path::Path;
-use std::fs::File;
-use std::io::Write;
-
-// TODO: just walk the "res" directory and generate whole crate automatically.
-const KEY_SERVER_SET_ABI: &'static str = include_str!("res/key_server_set.json");
-const REGISTRY_ABI: &'static str = include_str!("res/registrar.json");
-const URLHINT_ABI: &'static str = include_str!("res/urlhint.json");
-const SERVICE_TRANSACTION_ABI: &'static str = include_str!("res/service_transaction.json");
-const SECRETSTORE_ACL_STORAGE_ABI: &'static str = include_str!("res/secretstore_acl_storage.json");
-const SECRETSTORE_SERVICE_ABI: &'static str = include_str!("res/secretstore_service.json");
-const VALIDATOR_SET_ABI: &'static str = include_str!("res/validator_set.json");
-const VALIDATOR_REPORT_ABI: &'static str = include_str!("res/validator_report.json");
-const PEER_SET_ABI: &'static str = include_str!("res/peer_set.json");
-const TX_ACL_ABI: &'static str = include_str!("res/tx_acl.json");
-
-const TEST_VALIDATOR_SET_ABI: &'static str = include_str!("res/test_validator_set.json");
-
-fn build_file(name: &str, abi: &str, filename: &str) {
-	let code = ::native_contract_generator::generate_module(name, abi).unwrap();
-
-	let out_dir = ::std::env::var("OUT_DIR").unwrap();
-	let dest_path = Path::new(&out_dir).join(filename);
-	let mut f = File::create(&dest_path).unwrap();
-
-	f.write_all(code.as_bytes()).unwrap();
-}
-
-fn build_test_contracts() {
-	build_file("ValidatorSet", TEST_VALIDATOR_SET_ABI, "test_validator_set.rs");
-}
-
-fn main() {
-	build_file("KeyServerSet", KEY_SERVER_SET_ABI, "key_server_set.rs");
-	build_file("Registry", REGISTRY_ABI, "registry.rs");
-	build_file("Urlhint", URLHINT_ABI, "urlhint.rs");
-	build_file("ServiceTransactionChecker", SERVICE_TRANSACTION_ABI, "service_transaction.rs");
-	build_file("SecretStoreAclStorage", SECRETSTORE_ACL_STORAGE_ABI, "secretstore_acl_storage.rs");
-	build_file("SecretStoreService", SECRETSTORE_SERVICE_ABI, "secretstore_service.rs");
-	build_file("ValidatorSet", VALIDATOR_SET_ABI, "validator_set.rs");
-	build_file("ValidatorReport", VALIDATOR_REPORT_ABI, "validator_report.rs");
-	build_file("PeerSet", PEER_SET_ABI, "peer_set.rs");
-	build_file("TransactAcl", TX_ACL_ABI, "tx_acl.rs");
-
-	build_test_contracts();
-}

ethcore/native_contracts/generator/Cargo.toml

@@ -1,9 +0,0 @@
-[package]
-name = "native-contract-generator"
-description = "Generates Rust code for ethereum contract ABIs"
-version = "0.1.0"
-authors = ["Parity Technologies <admin@parity.io>"]
-
-[dependencies]
-ethabi = "4.0"
-heck = "0.3"

ethcore/native_contracts/generator/src/lib.rs

@@ -1,373 +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/>.
-
-//! Rust code contract generator.
-//! The code generated will require a dependence on the `ethcore-ethereum_types`,
-//! `ethabi`, `byteorder`, and `futures` crates.
-//! This currently isn't hygienic, so compilation of generated code may fail
-//! due to missing crates or name collisions. This will change when
-//! it can be ported to a procedural macro.
-
-extern crate ethabi;
-extern crate heck;
-
-use ethabi::{Contract, ParamType};
-use heck::SnakeCase;
-
-/// Errors in generation.
-#[derive(Debug)]
-pub enum Error {
-	/// Bad ABI.
-	Abi(ethabi::Error),
-	/// Unsupported parameter type in given function.
-	UnsupportedType(String, ParamType),
-}
-
-/// Given an ABI string, generate code for a a Rust module containing
-/// a struct which can be used to call it.
-// TODO: make this a proc macro when that's possible.
-pub fn generate_module(struct_name: &str, abi: &str) -> Result<String, Error> {
-	let contract = Contract::load(abi.as_bytes()).map_err(Error::Abi)?;
-	let functions = generate_functions(&contract)?;
-
-	Ok(format!(r##"
-use byteorder::{{BigEndian, ByteOrder}};
-use futures::{{future, Future, IntoFuture}};
-use ethabi::{{Bytes, Contract, Token, Event}};
-use ethereum_types;
-
-type BoxFuture<A, B> = Box<Future<Item = A, Error = B> + Send>;
-
-/// Generated Rust bindings to an Ethereum contract.
-#[derive(Clone, Debug)]
-pub struct {name} {{
-	contract: Contract,
-	/// Address to make calls to.
-	pub address: ethereum_types::H160,
-}}
-
-const ABI: &'static str = r#"{abi_str}"#;
-
-impl {name} {{
-	/// Create a new instance of `{name}` with an address.
-	/// Calls can be made, given a callback for dispatching calls asynchronously.
-	pub fn new(address: ethereum_types::H160) -> Self {{
-		let contract = Contract::load(ABI.as_bytes())
-			.expect("ABI checked at generation-time; qed");
-		{name} {{
-			contract: contract,
-			address: address,
-		}}
-	}}
-
-	/// Access the underlying `ethabi` contract.
-	pub fn contract(this: &Self) -> &Contract {{
-		&this.contract
-	}}
-
-	{functions}
-}}
-"##,
-		name = struct_name,
-		abi_str = abi,
-		functions = functions,
-	))
-}
-
-// generate function bodies from the ABI.
-fn generate_functions(contract: &Contract) -> Result<String, Error> {
-	let mut functions = String::new();
-	for function in contract.functions() {
-		let name = &function.name;
-		let snake_name = name.to_snake_case();
-		let inputs: Vec<_> = function.inputs.iter().map(|i| i.kind.clone()).collect();
-		let outputs: Vec<_> = function.outputs.iter().map(|i| i.kind.clone()).collect();
-
-		let (input_params, input_names, to_tokens) = input_params_codegen(&inputs)
-			.map_err(|bad_type| Error::UnsupportedType(name.clone(), bad_type))?;
-
-		let (output_type, decode_outputs) = output_params_codegen(&outputs)
-			.map_err(|bad_type| Error::UnsupportedType(name.clone(), bad_type))?;
-
-		functions.push_str(&format!(r##"
-/// Call the function "{abi_name}" on the contract.
-///
-/// Inputs: {abi_inputs:?}
-/// Outputs: {abi_outputs:?}
-pub fn {snake_name}<F, U>(&self, call: F, {params}) -> BoxFuture<{output_type}, String>
-	where
-	    F: FnOnce(ethereum_types::H160, Vec<u8>) -> U,
-	    U: IntoFuture<Item=Vec<u8>, Error=String>,
-		U::Future: Send + 'static
-{{
-	let call_addr = self.address;
-	let call_future = match self.encode_{snake_name}_input({params_names}) {{
-		Ok(call_data) => (call)(call_addr, call_data),
-		Err(e) => return Box::new(future::err(e)),
-	}};
-
-	let function = self.contract.function(r#"{abi_name}"#)
-		.expect("function existence checked at compile-time; qed").clone();
-
-	Box::new(call_future
-		.into_future()
-		.and_then(move |out| function.decode_output(&out).map_err(|e| format!("{{:?}}", e)))
-		.map(Vec::into_iter)
-		.and_then(|mut outputs| {decode_outputs}))
-}}
-
-/// Encode "{abi_name}" function arguments.
-/// Arguments: {abi_inputs:?}
-pub fn encode_{snake_name}_input(&self, {params}) -> Result<Vec<u8>, String> {{
-	self.contract.function(r#"{abi_name}"#)
-		.expect("function existence checked at compile-time; qed")
-		.encode_input(&{to_tokens})
-		.map_err(|e| format!("Error encoding call: {{:?}}", e))
-}}
-	"##,
-		abi_name = name,
-		abi_inputs = inputs,
-		abi_outputs = outputs,
-		snake_name = snake_name,
-		params = input_params,
-		params_names = input_names,
-		output_type = output_type,
-		to_tokens = to_tokens,
-		decode_outputs = decode_outputs,
-		))
-	}
-
-	Ok(functions)
-}
-
-// generate code for params in function signature and turning them into tokens.
-//
-// three pieces of code are generated: the first gives input types for the function signature,
-// the second one gives input parameter names to pass to another method,
-// and the third gives code to tokenize those inputs.
-//
-// params of form `param_0: type_0, param_1: type_1, ...`
-// tokenizing code of form `{let mut tokens = Vec::new(); tokens.push({param_X}); tokens }`
-//
-// returns any unsupported param type encountered.
-fn input_params_codegen(inputs: &[ParamType]) -> Result<(String, String, String), ParamType> {
-	let mut params = String::new();
-	let mut params_names = String::new();
-	let mut to_tokens = "{ let mut tokens = Vec::new();".to_string();
-
-	for (index, param_type) in inputs.iter().enumerate() {
-		let param_name = format!("param_{}", index);
-		let rust_type = rust_type(param_type.clone())?;
-		let (needs_mut, tokenize_code) = tokenize(&param_name, param_type.clone());
-
-		params.push_str(&format!("{}{}: {}, ",
-			if needs_mut { "mut " } else { "" }, param_name, rust_type));
-
-		params_names.push_str(&format!("{}, ", param_name));
-
-		to_tokens.push_str(&format!("tokens.push({{ {} }});", tokenize_code));
-	}
-
-	to_tokens.push_str(" tokens }");
-	Ok((params, params_names, to_tokens))
-}
-
-// generate code for outputs of the function and detokenizing them.
-//
-// two pieces of code are generated: the first gives an output type for the function signature
-// as a tuple, and the second gives code to get that tuple from a deque of tokens.
-//
-// produce output type of the form (type_1, type_2, ...) without trailing comma.
-// produce code for getting this output type from `outputs: Vec<Token>::IntoIter`, where
-// an `Err(String)` can be returned.
-//
-// returns any unsupported param type encountered.
-fn output_params_codegen(outputs: &[ParamType]) -> Result<(String, String), ParamType> {
-	let mut output_type = "(".to_string();
-	let mut decode_outputs = "Ok((".to_string();
-
-	for (index, output) in outputs.iter().cloned().enumerate() {
-		let rust_type = rust_type(output.clone())?;
-
-		output_type.push_str(&rust_type);
-
-		decode_outputs.push_str(&format!(
-			r#"
-				outputs
-					.next()
-					.and_then(|output| {{ {} }})
-					.ok_or_else(|| "Wrong output type".to_string())?
-			"#,
-			detokenize("output", output)
-		));
-
-		// don't append trailing commas for the last element
-		// so we can reuse the same code for single-output contracts,
-		// since T == (T) != (T,)
-		if index < outputs.len() - 1 {
-			output_type.push_str(", ");
-			decode_outputs.push_str(", ");
-		}
-	}
-
-	output_type.push_str(")");
-	decode_outputs.push_str("))");
-	Ok((output_type, decode_outputs))
-}
-
-// create code for an argument type from param type.
-fn rust_type(input: ParamType) -> Result<String, ParamType> {
-	Ok(match input {
-		ParamType::Address => "ethereum_types::H160".into(),
-		ParamType::FixedBytes(len) if len <= 32 => format!("ethereum_types::H{}", len * 8),
-		ParamType::Bytes | ParamType::FixedBytes(_) => "Vec<u8>".into(),
-		ParamType::Int(width) => match width {
-			8 | 16 | 32 | 64 => format!("i{}", width),
-			_ => return Err(ParamType::Int(width)),
-		},
-		ParamType::Uint(width) => match width {
-			8 | 16 | 32 | 64 => format!("u{}", width),
-			128 | 160 | 256 => format!("ethereum_types::U{}", width),
-			_ => return Err(ParamType::Uint(width)),
-		},
-		ParamType::Bool => "bool".into(),
-		ParamType::String => "String".into(),
-		ParamType::Array(kind) => format!("Vec<{}>", rust_type(*kind)?),
-		other => return Err(other),
-	})
-}
-
-// create code for tokenizing this parameter.
-// returns (needs_mut, code), where needs_mut indicates mutability required.
-// panics on unsupported types.
-fn tokenize(name: &str, input: ParamType) -> (bool, String) {
-	let mut needs_mut = false;
-	let code = match input {
-		ParamType::Address => format!("Token::Address({}.0)", name),
-		ParamType::Bytes => format!("Token::Bytes({})", name),
-		ParamType::FixedBytes(len) if len <= 32 =>
-			format!("Token::FixedBytes({}.0.to_vec())", name),
-		ParamType::FixedBytes(len) => {
-			needs_mut = true;
-			format!("{}.resize({}, 0); Token::FixedBytes({})", name, len, name)
-		}
-		ParamType::Int(width) => match width {
-			8 => format!("let mut r = [0xff; 32]; r[31] = {}; Token::Int(r)", name),
-			16 | 32 | 64 =>
-				format!("let mut r = [0xff; 32]; BigEndian::write_i{}(&mut r[{}..], {}); Token::Int(r))",
-					width, 32 - (width / 8), name),
-			_ => panic!("Signed int with more than 64 bits not supported."),
-		},
-		ParamType::Uint(width) => format!(
-			"let mut r = [0; 32]; {}.to_big_endian(&mut r); Token::Uint(r)",
-			if width <= 64 { format!("ethereum_types::U256::from({} as u64)", name) }
-			else { format!("ethereum_types::U256::from({})", name) }
-		),
-		ParamType::Bool => format!("Token::Bool({})", name),
-		ParamType::String => format!("Token::String({})", name),
-		ParamType::Array(kind) => {
-			let (needs_mut, code) = tokenize("i", *kind);
-			format!("Token::Array({}.into_iter().map(|{}i| {{ {} }}).collect())",
-				name, if needs_mut { "mut " } else { "" }, code)
-		}
-		ParamType::FixedArray(_, _) => panic!("Fixed-length arrays not supported."),
-	};
-
-	(needs_mut, code)
-}
-
-// create code for detokenizing this parameter.
-// takes an output type and the identifier of a token.
-// expands to code that evaluates to a Option<concrete type>
-// panics on unsupported types.
-fn detokenize(name: &str, output_type: ParamType) -> String {
-	match output_type {
-		ParamType::Address => format!("{}.to_address().map(ethereum_types::H160)", name),
-		ParamType::Bytes => format!("{}.to_bytes()", name),
-		ParamType::FixedBytes(len) if len <= 32 => {
-			// ensure no panic on slice too small.
-			let read_hash = format!("b.resize({}, 0); ethereum_types::H{}::from_slice(&b[..{}])",
-				len, len * 8, len);
-
-			format!("{}.to_fixed_bytes().map(|mut b| {{ {} }})",
-				name, read_hash)
-		}
-		ParamType::FixedBytes(_) => format!("{}.to_fixed_bytes()", name),
-		ParamType::Int(width) => {
-			let read_int = match width {
-				8 => "i[31] as i8".into(),
-				16 | 32 | 64 => format!("BigEndian::read_i{}(&i[{}..])", width, 32 - (width / 8)),
-				_ => panic!("Signed integers over 64 bytes not allowed."),
-			};
-			format!("{}.to_int().map(|i| {})", name, read_int)
-		}
-		ParamType::Uint(width) => {
-			let read_uint = match width {
-				8 => "u[31] as u8".into(),
-				16 | 32 | 64 => format!("BigEndian::read_u{}(&u[{}..])", width, 32 - (width / 8)),
-				_ => format!("ethereum_types::U{}::from(&u[..])", width),
-			};
-
-			format!("{}.to_uint().map(|u| {})", name, read_uint)
-		}
-		ParamType::Bool => format!("{}.to_bool()", name),
-		ParamType::String => format!("{}.to_string()", name),
-		ParamType::Array(kind) => {
-			let read_array = format!("x.into_iter().map(|a| {{ {} }}).collect::<Option<Vec<_>>>()",
-				detokenize("a", *kind));
-
-			format!("{}.to_array().and_then(|x| {{ {} }})",
-				name, read_array)
-		}
-		ParamType::FixedArray(_, _) => panic!("Fixed-length arrays not supported.")
-	}
-}
-
-#[cfg(test)]
-mod tests {
-	use ethabi::ParamType;
-
-	#[test]
-	fn input_types() {
-		assert_eq!(::input_params_codegen(&[]).unwrap().0, "");
-		assert_eq!(::input_params_codegen(&[ParamType::Address]).unwrap().0, "param_0: ethereum_types::H160, ");
-		assert_eq!(::input_params_codegen(&[ParamType::Address, ParamType::Bytes]).unwrap().0,
-			"param_0: ethereum_types::H160, param_1: Vec<u8>, ");
-	}
-
-	#[test]
-	fn output_types() {
-		assert_eq!(::output_params_codegen(&[]).unwrap().0, "()");
-		assert_eq!(::output_params_codegen(&[ParamType::Address]).unwrap().0, "(ethereum_types::H160)");
-		assert_eq!(::output_params_codegen(&[ParamType::Address, ParamType::Array(Box::new(ParamType::Bytes))]).unwrap().0,
-			"(ethereum_types::H160, Vec<Vec<u8>>)");
-	}
-
-	#[test]
-	fn rust_type() {
-		assert_eq!(::rust_type(ParamType::FixedBytes(32)).unwrap(), "ethereum_types::H256");
-		assert_eq!(::rust_type(ParamType::Array(Box::new(ParamType::FixedBytes(32)))).unwrap(),
-			"Vec<ethereum_types::H256>");
-
-		assert_eq!(::rust_type(ParamType::Uint(64)).unwrap(), "u64");
-		assert!(::rust_type(ParamType::Uint(63)).is_err());
-
-		assert_eq!(::rust_type(ParamType::Int(32)).unwrap(), "i32");
-		assert_eq!(::rust_type(ParamType::Uint(256)).unwrap(), "ethereum_types::U256");
-	}
-
-	// codegen tests will need bootstrapping of some kind.
-}

ethcore/native_contracts/res/tx_acl.json

@@ -1 +0,0 @@
-[{"constant":false,"inputs":[{"name":"sender","type":"address"}],"name":"allowedTxTypes","outputs":[{"name":"","type":"uint32"}],"payable":false,"stateMutability":"nonpayable","type":"function"}]

ethcore/native_contracts/res/urlhint.json

@@ -1,6 +0,0 @@
-[
-	{"constant":false,"inputs":[{"name":"_content","type":"bytes32"},{"name":"_url","type":"string"}],"name":"hintURL","outputs":[],"type":"function"},
-	{"constant":false,"inputs":[{"name":"_content","type":"bytes32"},{"name":"_accountSlashRepo","type":"string"},{"name":"_commit","type":"bytes20"}],"name":"hint","outputs":[],"type":"function"},
-	{"constant":true,"inputs":[{"name":"","type":"bytes32"}],"name":"entries","outputs":[{"name":"accountSlashRepo","type":"string"},{"name":"commit","type":"bytes20"},{"name":"owner","type":"address"}],"type":"function"},
-	{"constant":false,"inputs":[{"name":"_content","type":"bytes32"}],"name":"unhint","outputs":[],"type":"function"}
-]

ethcore/native_contracts/src/key_server_set.rs

@@ -1,21 +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/>.
-
-#![allow(unused_mut, unused_variables, unused_imports, unused_parens)]
-
-//! Secret store Key Server set contract.
-
-include!(concat!(env!("OUT_DIR"), "/key_server_set.rs"));

ethcore/native_contracts/src/lib.rs

@@ -1,48 +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/>.
-
-//! Native contracts useful for Parity. These are type-safe wrappers
-//! autogenerated at compile-time from Ethereum ABIs, and can be instantiated
-//! given any closure which can dispatch calls to them asynchronously.
-
-extern crate futures;
-extern crate byteorder;
-extern crate ethabi;
-extern crate ethereum_types;
-
-mod key_server_set;
-mod registry;
-mod urlhint;
-mod service_transaction;
-mod secretstore_acl_storage;
-mod secretstore_service;
-mod validator_set;
-mod validator_report;
-mod peer_set;
-mod tx_acl;
-
-pub mod test_contracts;
-
-pub use self::key_server_set::KeyServerSet;
-pub use self::registry::Registry;
-pub use self::urlhint::Urlhint;
-pub use self::service_transaction::ServiceTransactionChecker;
-pub use self::secretstore_acl_storage::SecretStoreAclStorage;
-pub use self::secretstore_service::SecretStoreService;
-pub use self::validator_set::ValidatorSet;
-pub use self::validator_report::ValidatorReport;
-pub use self::peer_set::PeerSet;
-pub use self::tx_acl::TransactAcl;

ethcore/native_contracts/src/peer_set.rs

@@ -1,21 +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/>.
-
-#![allow(unused_mut, unused_variables, unused_imports, unused_parens)]
-
-//! Peer set contract.
-
-include!(concat!(env!("OUT_DIR"), "/peer_set.rs"));

ethcore/native_contracts/src/registry.rs

@@ -1,22 +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/>.
-
-#![allow(unused_mut, unused_variables, unused_imports, unused_parens)]
-
-//! Registrar contract: maps names to addresses and data.
-// TODO: testing.
-
-include!(concat!(env!("OUT_DIR"), "/registry.rs"));

ethcore/native_contracts/src/secretstore_acl_storage.rs

@@ -1,22 +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/>.
-
-#![allow(unused_mut, unused_variables, unused_imports, unused_parens)]
-
-//! Secret store ACL storage contract.
-// TODO: testing.
-
-include!(concat!(env!("OUT_DIR"), "/secretstore_acl_storage.rs"));

ethcore/native_contracts/src/secretstore_service.rs

@@ -1,21 +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/>.
-
-#![allow(unused_mut, unused_variables, unused_imports, unused_parens)]
-
-//! Secret store service contract.
-
-include!(concat!(env!("OUT_DIR"), "/secretstore_service.rs"));

ethcore/native_contracts/src/service_transaction.rs

@@ -1,22 +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/>.
-
-#![allow(unused_mut, unused_variables, unused_imports, unused_parens)]
-
-//! Service transaction contract.
-// TODO: testing.
-
-include!(concat!(env!("OUT_DIR"), "/service_transaction.rs"));

ethcore/native_contracts/src/test_contracts/mod.rs

@@ -1,21 +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/>.
-
-//! Contracts used for testing.
-
-pub mod validator_set;
-
-pub use self::validator_set::ValidatorSet;

ethcore/native_contracts/src/test_contracts/validator_set.rs

@@ -1,21 +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/>.
-
-#![allow(unused_mut, unused_variables, unused_imports, unused_parens)]
-
-//! Test validator set contract.
-
-include!(concat!(env!("OUT_DIR"), "/test_validator_set.rs"));

ethcore/native_contracts/src/tx_acl.rs

@@ -1,21 +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/>.
-
-#![allow(unused_mut, unused_variables, unused_imports, unused_parens)]
-
-//! Transact permissions contract.
-
-include!(concat!(env!("OUT_DIR"), "/tx_acl.rs"));

ethcore/native_contracts/src/urlhint.rs

@@ -1,22 +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/>.
-
-#![allow(unused_mut, unused_variables, unused_imports)]
-
-//! Registrar contract: maps names to arbitrary URL.
-// TODO: testing.
-
-include!(concat!(env!("OUT_DIR"), "/urlhint.rs"));

ethcore/native_contracts/src/validator_report.rs

@@ -1,22 +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/>.
-
-#![allow(unused_mut, unused_variables, unused_imports)]
-
-//! Validator reporting.
-// TODO: testing.
-
-include!(concat!(env!("OUT_DIR"), "/validator_report.rs"));

ethcore/native_contracts/src/validator_set.rs

@@ -1,22 +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/>.
-
-#![allow(unused_mut, unused_variables, unused_imports, unused_parens)]
-
-//! Validator set contract.
-// TODO: testing.
-
-include!(concat!(env!("OUT_DIR"), "/validator_set.rs"));

ethcore/node_filter/Cargo.toml

@@ -10,11 +10,13 @@ authors = ["Parity Technologies <admin@parity.io>"]
 ethcore = { path = ".."}
 ethcore-bytes = { path = "../../util/bytes" }
 ethcore-network = { path = "../../util/network" }
-ethereum-types = "0.1"
+ethereum-types = "0.2"
-native-contracts = { path = "../native_contracts" }
-futures = "0.1"
 log = "0.3"
 parking_lot = "0.5"
+ethabi = "5.1"
+ethabi-derive = "5.0"
+ethabi-contract = "5.0"
+lru-cache = "0.1"
 
 [dev-dependencies]
 kvdb-memorydb = { path = "../../util/kvdb-memorydb" }

ethcore/node_filter/src/lib.rs

@@ -16,50 +16,55 @@
 
 //! Smart contract based node filter.
 
+extern crate ethabi;
 extern crate ethcore;
 extern crate ethcore_bytes as bytes;
 extern crate ethcore_network as network;
 extern crate ethereum_types;
-extern crate native_contracts;
+extern crate lru_cache;
-extern crate futures;
 extern crate parking_lot;
 
 #[macro_use]
-extern crate log;
+extern crate ethabi_derive;
-
+#[macro_use]
-#[cfg(test)]
+extern crate ethabi_contract;
-extern crate kvdb_memorydb;
 #[cfg(test)]
 extern crate ethcore_io as io;
+#[cfg(test)]
+extern crate kvdb_memorydb;
+#[macro_use]
+extern crate log;
 
 use std::sync::Weak;
-use std::collections::HashMap;
+
-use native_contracts::PeerSet as Contract;
+use lru_cache::LruCache;
-use network::{NodeId, ConnectionFilter, ConnectionDirection};
+use parking_lot::Mutex;
+
+use bytes::Bytes;
 use ethcore::client::{BlockChainClient, BlockId, ChainNotify};
 use ethereum_types::{H256, Address};
-use bytes::Bytes;
+use network::{NodeId, ConnectionFilter, ConnectionDirection};
-use parking_lot::Mutex;
+
-use futures::Future;
+use_contract!(peer_set, "PeerSet", "res/peer_set.json");
 
 const MAX_CACHE_SIZE: usize = 4096;
 
 /// Connection filter that uses a contract to manage permissions.
 pub struct NodeFilter {
-	contract: Mutex<Option<Contract>>,
+	contract: peer_set::PeerSet,
 	client: Weak<BlockChainClient>,
 	contract_address: Address,
-	permission_cache: Mutex<HashMap<NodeId, bool>>,
+	permission_cache: Mutex<LruCache<NodeId, bool>>,
 }
 
 impl NodeFilter {
 	/// Create a new instance. Accepts a contract address.
 	pub fn new(client: Weak<BlockChainClient>, contract_address: Address) -> NodeFilter {
 		NodeFilter {
-			contract: Mutex::new(None),
+			contract: peer_set::PeerSet::default(),
 			client: client,
 			contract_address: contract_address,
-			permission_cache: Mutex::new(HashMap::new()),
+			permission_cache: Mutex::new(LruCache::new(MAX_CACHE_SIZE)),
 		}
 	}
 
@@ -73,40 +78,30 @@ impl ConnectionFilter for NodeFilter {
 	fn connection_allowed(&self, own_id: &NodeId, connecting_id: &NodeId, _direction: ConnectionDirection) -> bool {
 
 		let mut cache = self.permission_cache.lock();
-		if let Some(res) = cache.get(connecting_id) {
+		if let Some(res) = cache.get_mut(connecting_id) {
 			return *res;
 		}
 
-		let mut contract = self.contract.lock();
+		let client = match self.client.upgrade() {
-		if contract.is_none() {
+			Some(client) => client,
-			*contract = Some(Contract::new(self.contract_address));
+			None => return false,
-		}
-
-		let allowed = match (self.client.upgrade(), &*contract) {
-			(Some(ref client), &Some(ref contract)) => {
-				let own_low = H256::from_slice(&own_id[0..32]);
-				let own_high = H256::from_slice(&own_id[32..64]);
-				let id_low = H256::from_slice(&connecting_id[0..32]);
-				let id_high = H256::from_slice(&connecting_id[32..64]);
-				let allowed = contract.connection_allowed(
-					|addr, data| futures::done(client.call_contract(BlockId::Latest, addr, data)),
-					own_low,
-					own_high,
-					id_low,
-					id_high,
-				).wait().unwrap_or_else(|e| {
-					debug!("Error callling peer set contract: {:?}", e);
-					false
-				});
-
-				allowed
-			}
-			_ => false,
 		};
 
-		if cache.len() < MAX_CACHE_SIZE {
+		let address = self.contract_address;
-			cache.insert(*connecting_id, allowed);
+		let own_low = H256::from_slice(&own_id[0..32]);
-		}
+		let own_high = H256::from_slice(&own_id[32..64]);
+		let id_low = H256::from_slice(&connecting_id[0..32]);
+		let id_high = H256::from_slice(&connecting_id[32..64]);
+
+		let allowed = self.contract.functions()
+			.connection_allowed()
+			.call(own_low, own_high, id_low, id_high, &|data| client.call_contract(BlockId::Latest, address, data))
+			.unwrap_or_else(|e| {
+				debug!("Error callling peer set contract: {:?}", e);
+				false
+			});
+
+		cache.insert(*connecting_id, allowed);
 		allowed
 	}
 }

ethcore/res/contracts/tx_acl.json

@@ -0,0 +1 @@
+[{"constant":true,"inputs":[{"name":"sender","type":"address"}],"name":"allowedTxTypes","outputs":[{"name":"","type":"uint32"}],"payable":false,"stateMutability":"nonpayable","type":"function"}]

ethcore/src/client/client.rs

@@ -50,13 +50,11 @@ use vm::{EnvInfo, LastHashes};
 use evm::{Factory as EvmFactory, Schedule};
 use executive::{Executive, Executed, TransactOptions, contract_address};
 use factory::Factories;
-use futures::{future, Future};
 use header::{BlockNumber, Header, Seal};
 use io::*;
 use log_entry::LocalizedLogEntry;
 use miner::{Miner, MinerService};
-use native_contracts::Registry;
+use parking_lot::{Mutex, RwLock};
-use parking_lot::{Mutex, RwLock, MutexGuard};
 use rand::OsRng;
 use receipt::{Receipt, LocalizedReceipt};
 use rlp::UntrustedRlp;
@@ -82,6 +80,8 @@ pub use types::block_status::BlockStatus;
 pub use blockchain::CacheSize as BlockChainCacheSize;
 pub use verification::queue::QueueInfo as BlockQueueInfo;
 
+use_contract!(registry, "Registry", "res/contracts/registrar.json");
+
 const MAX_TX_QUEUE_SIZE: usize = 4096;
 const MAX_QUEUE_SIZE_TO_SLEEP_ON: usize = 2;
 const MIN_HISTORY_SIZE: u64 = 8;
@@ -165,7 +165,8 @@ pub struct Client {
 	history: u64,
 	ancient_verifier: Mutex<Option<AncientVerifier>>,
 	on_user_defaults_change: Mutex<Option<Box<FnMut(Option<Mode>) + 'static + Send>>>,
-	registrar: Mutex<Option<Registry>>,
+	registrar: registry::Registry,
+	registrar_address: Option<Address>,
 	exit_handler: Mutex<Option<Box<Fn(bool, Option<String>) + 'static + Send>>>,
 }
 
@@ -217,7 +218,7 @@ impl Client {
 		};
 
 		if !chain.block_header(&chain.best_block_hash()).map_or(true, |h| state_db.journal_db().contains(h.state_root())) {
-			warn!("State root not found for block #{} ({})", chain.best_block_number(), chain.best_block_hash().hex());
+			warn!("State root not found for block #{} ({:x})", chain.best_block_number(), chain.best_block_hash());
 		}
 
 		let engine = spec.engine.clone();
@@ -226,6 +227,11 @@ impl Client {
 
 		let awake = match config.mode { Mode::Dark(..) | Mode::Off => false, _ => true };
 
+		let registrar_address = engine.additional_params().get("registrar").and_then(|s| Address::from_str(s).ok());
+		if let Some(ref addr) = registrar_address {
+			trace!(target: "client", "Found registrar at {}", addr);
+		}
+
 		let client = Arc::new(Client {
 			enabled: AtomicBool::new(true),
 			sleep_state: Mutex::new(SleepState::new(awake)),
@@ -251,7 +257,8 @@ impl Client {
 			history: history,
 			ancient_verifier: Mutex::new(None),
 			on_user_defaults_change: Mutex::new(None),
-			registrar: Mutex::new(None),
+			registrar: registry::Registry::default(),
+			registrar_address,
 			exit_handler: Mutex::new(None),
 		});
 
@@ -294,12 +301,6 @@ impl Client {
 			}
 		}
 
-		if let Some(reg_addr) = client.additional_params().get("registrar").and_then(|s| Address::from_str(s).ok()) {
-			trace!(target: "client", "Found registrar at {}", reg_addr);
-			let registrar = Registry::new(reg_addr);
-			*client.registrar.lock() = Some(registrar);
-		}
-
 		// ensure buffered changes are flushed.
 		client.db.read().flush().map_err(ClientError::Database)?;
 		Ok(client)
@@ -340,11 +341,6 @@ impl Client {
 		}
 	}
 
-	/// Get the Registry object - useful for looking up names.
-	pub fn registrar(&self) -> MutexGuard<Option<Registry>> {
-		self.registrar.lock()
-	}
-
 	/// Register an action to be done if a mode/spec_name change happens.
 	pub fn on_user_defaults_change<F>(&self, f: F) where F: 'static + FnMut(Option<Mode>) + Send {
 		*self.on_user_defaults_change.lock() = Some(Box::new(f));
@@ -1828,18 +1824,24 @@ impl BlockChainClient for Client {
 	}
 
 	fn registrar_address(&self) -> Option<Address> {
-		self.registrar.lock().as_ref().map(|r| r.address)
+		self.registrar_address.clone()
 	}
 
 	fn registry_address(&self, name: String) -> Option<Address> {
-		self.registrar.lock().as_ref()
+		let address = match self.registrar_address {
-			.and_then(|r| {
+			Some(address) => address,
-				let dispatch = move |reg_addr, data| {
+			None => return None,
-					future::done(self.call_contract(BlockId::Latest, reg_addr, data))
+		};
-				};
+
-				r.get_address(dispatch, keccak(name.as_bytes()), "A".to_string()).wait().ok()
+		self.registrar.functions()
+			.get_address()
+			.call(keccak(name.as_bytes()), "A", &|data| self.call_contract(BlockId::Latest, address, data))
+			.ok()
+			.and_then(|a| if a.is_zero() {
+				None
+			} else {
+				Some(a)
 			})
-			.and_then(|a| if a.is_zero() { None } else { Some(a) })
 	}
 
 	fn eip86_transition(&self) -> u64 {

ethcore/src/engines/validator_set/contract.rs

@@ -18,12 +18,10 @@
 /// It can also report validators for misbehaviour with two levels: `reportMalicious` and `reportBenign`.
 
 use std::sync::Weak;
+
+use bytes::Bytes;
 use ethereum_types::{H256, Address};
 use parking_lot::RwLock;
-use bytes::Bytes;
-
-use futures::Future;
-use native_contracts::ValidatorReport as Provider;
 
 use client::EngineClient;
 use header::{Header, BlockNumber};
@@ -32,40 +30,41 @@ use machine::{AuxiliaryData, Call, EthereumMachine};
 use super::{ValidatorSet, SimpleList, SystemCall};
 use super::safe_contract::ValidatorSafeContract;
 
+use_contract!(validator_report, "ValidatorReport", "res/contracts/validator_report.json");
+
 /// A validator contract with reporting.
 pub struct ValidatorContract {
+	contract_address: Address,
 	validators: ValidatorSafeContract,
-	provider: Provider,
+	provider: validator_report::ValidatorReport,
 	client: RwLock<Option<Weak<EngineClient>>>, // TODO [keorn]: remove
 }
 
 impl ValidatorContract {
 	pub fn new(contract_address: Address) -> Self {
 		ValidatorContract {
+			contract_address,
 			validators: ValidatorSafeContract::new(contract_address),
-			provider: Provider::new(contract_address),
+			provider: validator_report::ValidatorReport::default(),
 			client: RwLock::new(None),
 		}
 	}
 }
 
 impl ValidatorContract {
-	// could be `impl Trait`.
+	fn transact(&self, data: Bytes) -> Result<(), String> {
-	// note: dispatches transactions to network as well as execute.
+		let client = self.client.read().as_ref()
-	// TODO [keorn]: Make more general.
-	fn transact(&self) -> Box<Fn(Address, Bytes) -> Result<Bytes, String>> {
-		let client = self.client.read().clone();
-		Box::new(move |a, d| client.as_ref()
 			.and_then(Weak::upgrade)
-			.ok_or_else(|| "No client!".into())
+			.ok_or_else(|| "No client!")?;
-			.and_then(|c| {
+
-				match c.as_full_client() {
+		match client.as_full_client() {
-					Some(c) => c.transact_contract(a, d)
+			Some(c) => {
-						.map_err(|e| format!("Transaction import error: {}", e)),
+				c.transact_contract(self.contract_address, data)
-					None => Err("No full client!".into()),
+					.map_err(|e| format!("Transaction import error: {}", e))?;
-				}
+				Ok(())
-			})
+			},
-			.map(|_| Default::default()))
+			None => Err("No full client!".into()),
+		}
 	}
 }
 
@@ -112,14 +111,16 @@ impl ValidatorSet for ValidatorContract {
 	}
 
 	fn report_malicious(&self, address: &Address, _set_block: BlockNumber, block: BlockNumber, proof: Bytes) {
-		match self.provider.report_malicious(&*self.transact(), *address, block.into(), proof).wait() {
+		let data = self.provider.functions().report_malicious().input(*address, block, proof);
+		match self.transact(data) {
 			Ok(_) => warn!(target: "engine", "Reported malicious validator {}", address),
 			Err(s) => warn!(target: "engine", "Validator {} could not be reported {}", address, s),
 		}
 	}
 
 	fn report_benign(&self, address: &Address, _set_block: BlockNumber, block: BlockNumber) {
-		match self.provider.report_benign(&*self.transact(), *address, block.into()).wait() {
+		let data = self.provider.functions().report_benign().input(*address, block);
+		match self.transact(data) {
 			Ok(_) => warn!(target: "engine", "Reported benign validator misbehaviour {}", address),
 			Err(s) => warn!(target: "engine", "Validator {} could not be reported {}", address, s),
 		}

ethcore/src/engines/validator_set/safe_contract.rs

@@ -17,11 +17,9 @@
 /// Validator set maintained in a contract, updated using `getValidators` method.
 
 use std::sync::{Weak, Arc};
-use futures::Future;
-use native_contracts::ValidatorSet as Provider;
 use hash::keccak;
 
-use ethereum_types::{H160, H256, U256, Address, Bloom};
+use ethereum_types::{H256, U256, Address, Bloom};
 use parking_lot::{Mutex, RwLock};
 
 use bytes::Bytes;
@@ -40,6 +38,8 @@ use receipt::Receipt;
 use super::{SystemCall, ValidatorSet};
 use super::simple_list::SimpleList;
 
+use_contract!(validator_set, "ValidatorSet", "res/contracts/validator_set.json");
+
 const MEMOIZE_CAPACITY: usize = 500;
 
 // TODO: ethabi should be able to generate this.
@@ -52,13 +52,14 @@ lazy_static! {
 // state-dependent proofs for the safe contract:
 // only "first" proofs are such.
 struct StateProof {
+	contract_address: Address,
 	header: Mutex<Header>,
-	provider: Provider,
+	provider: validator_set::ValidatorSet,
 }
 
 impl ::engines::StateDependentProof<EthereumMachine> for StateProof {
 	fn generate_proof(&self, caller: &Call) -> Result<Vec<u8>, String> {
-		prove_initial(&self.provider, &*self.header.lock(), caller)
+		prove_initial(&self.provider, self.contract_address, &*self.header.lock(), caller)
 	}
 
 	fn check_proof(&self, machine: &EthereumMachine, proof: &[u8]) -> Result<(), String> {
@@ -68,15 +69,15 @@ impl ::engines::StateDependentProof<EthereumMachine> for StateProof {
 			return Err("wrong header in proof".into());
 		}
 
-		check_first_proof(machine, &self.provider, header, &state_items).map(|_| ())
+		check_first_proof(machine, &self.provider, self.contract_address, header, &state_items).map(|_| ())
 	}
 }
 
 /// The validator contract should have the following interface:
 pub struct ValidatorSafeContract {
-	pub address: Address,
+	contract_address: Address,
 	validators: RwLock<MemoryLruCache<H256, SimpleList>>,
-	provider: Provider,
+	provider: validator_set::ValidatorSet,
 	client: RwLock<Option<Weak<EngineClient>>>, // TODO [keorn]: remove
 }
 
@@ -92,7 +93,7 @@ fn encode_first_proof(header: &Header, state_items: &[Vec<u8>]) -> Bytes {
 }
 
 // check a first proof: fetch the validator set at the given block.
-fn check_first_proof(machine: &EthereumMachine, provider: &Provider, old_header: Header, state_items: &[DBValue])
+fn check_first_proof(machine: &EthereumMachine, provider: &validator_set::ValidatorSet, contract_address: Address, old_header: Header, state_items: &[DBValue])
 	-> Result<Vec<Address>, String>
 {
 	use transaction::{Action, Transaction};
@@ -117,15 +118,15 @@ fn check_first_proof(machine: &EthereumMachine, provider: &Provider, old_header:
 
 	// check state proof using given machine.
 	let number = old_header.number();
-	provider.get_validators(move |a, d| {
+	provider.functions().get_validators().call(&|data| {
 		let from = Address::default();
 		let tx = Transaction {
 			nonce: machine.account_start_nonce(number),
-			action: Action::Call(a),
+			action: Action::Call(contract_address),
 			gas: PROVIDED_GAS.into(),
 			gas_price: U256::default(),
 			value: U256::default(),
-			data: d,
+			data,
 		}.fake_sign(from);
 
 		let res = ::state::check_proof(
@@ -141,7 +142,7 @@ fn check_first_proof(machine: &EthereumMachine, provider: &Provider, old_header:
 			::state::ProvedExecution::Failed(e) => Err(format!("Failed call: {}", e)),
 			::state::ProvedExecution::Complete(e) => Ok(e.output),
 		}
-	}).wait()
+	}).map_err(|err| err.to_string())
 }
 
 fn decode_first_proof(rlp: &UntrustedRlp) -> Result<(Header, Vec<DBValue>), ::error::Error> {
@@ -170,18 +171,19 @@ fn decode_proof(rlp: &UntrustedRlp) -> Result<(Header, Vec<Receipt>), ::error::E
 
 // given a provider and caller, generate proof. this will just be a state proof
 // of `getValidators`.
-fn prove_initial(provider: &Provider, header: &Header, caller: &Call) -> Result<Vec<u8>, String> {
+fn prove_initial(provider: &validator_set::ValidatorSet, contract_address: Address, header: &Header, caller: &Call) -> Result<Vec<u8>, String> {
 	use std::cell::RefCell;
 
 	let epoch_proof = RefCell::new(None);
 	let res = {
-		let caller = |a, d| {
+		let caller = |data| {
-			let (result, proof) = caller(a, d)?;
+			let (result, proof) = caller(contract_address, data)?;
 			*epoch_proof.borrow_mut() = Some(encode_first_proof(header, &proof));
 			Ok(result)
 		};
 
-		provider.get_validators(caller).wait()
+		provider.functions().get_validators().call(&caller)
+			.map_err(|err| err.to_string())
 	};
 
 	res.map(|validators| {
@@ -200,17 +202,18 @@ fn prove_initial(provider: &Provider, header: &Header, caller: &Call) -> Result<
 impl ValidatorSafeContract {
 	pub fn new(contract_address: Address) -> Self {
 		ValidatorSafeContract {
-			address: contract_address,
+			contract_address,
 			validators: RwLock::new(MemoryLruCache::new(MEMOIZE_CAPACITY)),
-			provider: Provider::new(contract_address),
+			provider: validator_set::ValidatorSet::default(),
 			client: RwLock::new(None),
 		}
 	}
 
 	/// Queries the state and gets the set of validators.
 	fn get_list(&self, caller: &Call) -> Option<SimpleList> {
-		let caller = move |a, d| caller(a, d).map(|x| x.0);
+		let contract_address = self.contract_address;
-		match self.provider.get_validators(caller).wait() {
+		let caller = move |data| caller(contract_address, data).map(|x| x.0);
+		match self.provider.functions().get_validators().call(&caller) {
 			Ok(new) => {
 				debug!(target: "engine", "Set of validators obtained: {:?}", new);
 				Some(SimpleList::new(new))
@@ -244,7 +247,7 @@ impl ValidatorSafeContract {
 			header.hash(), topics);
 
 		LogEntry {
-			address: self.address,
+			address: self.contract_address,
 			topics: topics,
 			data: Vec::new(), // irrelevant for bloom.
 		}.bloom()
@@ -254,52 +257,29 @@ impl ValidatorSafeContract {
 	// header the receipts correspond to.
 	fn extract_from_event(&self, bloom: Bloom, header: &Header, receipts: &[Receipt]) -> Option<SimpleList> {
 		let check_log = |log: &LogEntry| {
-			log.address == self.address &&
+			log.address == self.contract_address &&
 				log.topics.len() == 2 &&
 				log.topics[0] == *EVENT_NAME_HASH &&
 				log.topics[1] == *header.parent_hash()
 		};
 
-		let event = Provider::contract(&self.provider)
+		let event = self.provider.events().initiate_change();
-			.event("InitiateChange".into())
+		//// iterate in reverse because only the _last_ change in a given
-			.expect("Contract known ahead of time to have `InitiateChange` event; qed");
+		//// block actually has any effect.
-
+		//// the contract should only increment the nonce once.
-		// iterate in reverse because only the _last_ change in a given
-		// block actually has any effect.
-		// the contract should only increment the nonce once.
 		let mut decoded_events = receipts.iter()
 			.rev()
-			.filter(|r| &bloom & &r.log_bloom == bloom)
+			.filter(|r| r.log_bloom.contains_bloom(&bloom))
 			.flat_map(|r| r.logs.iter())
 			.filter(move |l| check_log(l))
 			.filter_map(|log| {
-				let topics = log.topics.iter().map(|x| x.0.clone()).collect();
+				event.parse_log((log.topics.clone(), log.data.clone()).into()).ok()
-				event.parse_log((topics, log.data.clone()).into()).ok()
 			});
 
+		// only last log is taken into account
 		match decoded_events.next() {
 			None => None,
-			Some(matched_event) => {
+			Some(matched_event) => Some(SimpleList::new(matched_event.new_set))
-
-				// decode log manually until the native contract generator is
-				// good enough to do it for us.
-				let validators_token = &matched_event.params[1].value;
-
-				let validators = validators_token.clone().to_array()
-					.and_then(|a| a.into_iter()
-						.map(|x| x.to_address().map(H160))
-						.collect::<Option<Vec<_>>>()
-					)
-					.map(SimpleList::new);
-
-				if validators.is_none() {
-					debug!(target: "engine", "Successfully decoded log turned out to be bad.");
-				}
-
-				trace!(target: "engine", "decoded log. validators: {:?}", validators);
-
-				validators
-			}
 		}
 	}
 }
@@ -320,14 +300,15 @@ impl ValidatorSet for ValidatorSafeContract {
 	}
 
 	fn on_epoch_begin(&self, _first: bool, _header: &Header, caller: &mut SystemCall) -> Result<(), ::error::Error> {
-		self.provider.finalize_change(caller)
+		let data = self.provider.functions().finalize_change().input();
-			.wait()
+		caller(self.contract_address, data)
+			.map(|_| ())
 			.map_err(::engines::EngineError::FailedSystemCall)
 			.map_err(Into::into)
 	}
 
 	fn genesis_epoch_data(&self, header: &Header, call: &Call) -> Result<Vec<u8>, String> {
-		prove_initial(&self.provider, header, call)
+		prove_initial(&self.provider, self.contract_address, header, call)
 	}
 
 	fn is_epoch_end(&self, _first: bool, _chain_head: &Header) -> Option<Vec<u8>> {
@@ -343,8 +324,9 @@ impl ValidatorSet for ValidatorSafeContract {
 		if first {
 			debug!(target: "engine", "signalling transition to fresh contract.");
 			let state_proof = Arc::new(StateProof {
+				contract_address: self.contract_address,
 				header: Mutex::new(header.clone()),
-				provider: self.provider.clone(),
+				provider: validator_set::ValidatorSet::default(),
 			});
 			return ::engines::EpochChange::Yes(::engines::Proof::WithState(state_proof as Arc<_>));
 		}
@@ -383,7 +365,7 @@ impl ValidatorSet for ValidatorSafeContract {
 			let (old_header, state_items) = decode_first_proof(&rlp)?;
 			let number = old_header.number();
 			let old_hash = old_header.hash();
-			let addresses = check_first_proof(machine, &self.provider, old_header, &state_items)
+			let addresses = check_first_proof(machine, &self.provider, self.contract_address, old_header, &state_items)
 				.map_err(::engines::EngineError::InsufficientProof)?;
 
 			trace!(target: "engine", "extracted epoch set at #{}: {} addresses",

ethcore/src/ethereum/ethash.rs

@@ -175,8 +175,8 @@ impl Engine<EthereumMachine> for Arc<Ethash> {
 	fn extra_info(&self, header: &Header) -> BTreeMap<String, String> {
 		if header.seal().len() == self.seal_fields() {
 			map![
-				"nonce".to_owned() => format!("0x{}", header.nonce().hex()),
+				"nonce".to_owned() => format!("0x{:x}", header.nonce()),
-				"mixHash".to_owned() => format!("0x{}", header.mix_hash().hex())
+				"mixHash".to_owned() => format!("0x{:x}", header.mix_hash())
 			]
 		} else {
 			BTreeMap::default()
@@ -384,9 +384,9 @@ impl Ethash {
 
 			let diff_inc = (header.timestamp() - parent.timestamp()) / increment_divisor;
 			if diff_inc <= threshold {
-				*parent.difficulty() + *parent.difficulty() / difficulty_bound_divisor * (threshold - diff_inc).into()
+				*parent.difficulty() + *parent.difficulty() / difficulty_bound_divisor * U256::from(threshold - diff_inc)
 			} else {
-				let multiplier = cmp::min(diff_inc - threshold, 99).into();
+				let multiplier: U256 = cmp::min(diff_inc - threshold, 99).into();
 				parent.difficulty().saturating_sub(
 					*parent.difficulty() / difficulty_bound_divisor * multiplier
 				)
@@ -474,6 +474,7 @@ mod tests {
 	use error::{BlockError, Error};
 	use header::Header;
 	use spec::Spec;
+	use engines::Engine;
 	use super::super::{new_morden, new_mcip3_test, new_homestead_test_machine};
 	use super::{Ethash, EthashParams, ecip1017_eras_block_reward};
 	use rlp;
@@ -849,4 +850,16 @@ mod tests {
 		let difficulty = ethash.calculate_difficulty(&header, &parent_header);
 		assert_eq!(U256::from(12543204905719u64), difficulty);
 	}
+
+	#[test]
+	fn test_extra_info() {
+		let machine = new_homestead_test_machine();
+		let ethparams = get_default_ethash_params();
+		let ethash = Ethash::new(&::std::env::temp_dir(), ethparams, machine, None);
+		let mut header = Header::default();
+		header.set_seal(vec![rlp::encode(&H256::from("b251bd2e0283d0658f2cadfdc8ca619b5de94eca5742725e2e757dd13ed7503d")).into_vec(), rlp::encode(&H64::zero()).into_vec()]);
+		let info = ethash.extra_info(&header);
+		assert_eq!(info["nonce"], "0x0000000000000000");
+		assert_eq!(info["mixHash"], "0xb251bd2e0283d0658f2cadfdc8ca619b5de94eca5742725e2e757dd13ed7503d");
+	}
 }

ethcore/src/lib.rs

@@ -71,12 +71,10 @@ extern crate ethcore_transaction as transaction;
 extern crate ethereum_types;
 extern crate ethjson;
 extern crate ethkey;
-extern crate futures;
 extern crate hardware_wallet;
 extern crate hashdb;
 extern crate itertools;
 extern crate lru_cache;
-extern crate native_contracts;
 extern crate num_cpus;
 extern crate num;
 extern crate parity_machine;
@@ -99,6 +97,12 @@ extern crate util_error;
 extern crate snappy;
 extern crate migration;
 
+extern crate ethabi;
+#[macro_use]
+extern crate ethabi_derive;
+#[macro_use]
+extern crate ethabi_contract;
+
 #[macro_use]
 extern crate rlp_derive;
 extern crate rustc_hex;

ethcore/src/machine.rs

@@ -220,7 +220,7 @@ impl EthereumMachine {
 					let total_lower_limit = cmp::max(lower_limit, gas_floor_target);
 					let total_upper_limit = cmp::min(upper_limit, gas_ceil_target);
 					let gas_limit = cmp::max(gas_floor_target, cmp::min(total_upper_limit,
-						lower_limit + (header.gas_used().clone() * 6.into() / 5.into()) / bound_divisor));
+						lower_limit + (header.gas_used().clone() * 6u32 / 5.into()) / bound_divisor));
 					round_block_gas_limit(gas_limit, total_lower_limit, total_upper_limit)
 				};
 				// ensure that we are not violating protocol limits
@@ -384,7 +384,7 @@ impl EthereumMachine {
 	/// Additional params.
 	pub fn additional_params(&self) -> HashMap<String, String> {
 		hash_map![
-			"registrar".to_owned() => self.params.registrar.hex()
+			"registrar".to_owned() => format!("{:x}", self.params.registrar)
 		]
 	}
 }

ethcore/src/miner/miner.rs

@@ -647,7 +647,7 @@ impl Miner {
 		queue.set_gas_limit(gas_limit);
 		if let GasLimit::Auto = self.options.tx_queue_gas_limit {
 			// Set total tx queue gas limit to be 20x the block gas limit.
-			queue.set_total_gas_limit(gas_limit * 20.into());
+			queue.set_total_gas_limit(gas_limit * 20u32);
 		}
 	}
 
@@ -720,9 +720,6 @@ impl Miner {
 							}
 						}).unwrap_or(default_origin);
 
-						// try to install service transaction checker before appending transactions
-						self.service_transaction_action.update_from_chain_client(client);
-
 						let details_provider = TransactionDetailsProvider::new(client, &self.service_transaction_action);
 						match origin {
 							TransactionOrigin::Local | TransactionOrigin::RetractedBlock => {
@@ -838,7 +835,7 @@ impl MinerService for Miner {
 
 	fn sensible_gas_price(&self) -> U256 {
 		// 10% above our minimum.
-		*self.transaction_queue.read().minimal_gas_price() * 110.into() / 100.into()
+		*self.transaction_queue.read().minimal_gas_price() * 110u32 / 100.into()
 	}
 
 	fn sensible_gas_limit(&self) -> U256 {
@@ -1169,7 +1166,7 @@ impl MinerService for Miner {
 			let n = sealed.header().number();
 			let h = sealed.header().hash();
 			chain.import_sealed_block(sealed)?;
-			info!(target: "miner", "Submitted block imported OK. #{}: {}", Colour::White.bold().paint(format!("{}", n)), Colour::White.bold().paint(h.hex()));
+			info!(target: "miner", "Submitted block imported OK. #{}: {}", Colour::White.bold().paint(format!("{}", n)), Colour::White.bold().paint(format!("{:x}", h)));
 			Ok(())
 		})
 	}
@@ -1231,12 +1228,6 @@ enum ServiceTransactionAction {
 }
 
 impl ServiceTransactionAction {
-	pub fn update_from_chain_client(&self, client: &MiningBlockChainClient) {
-		if let ServiceTransactionAction::Check(ref checker) = *self {
-			checker.update_from_chain_client(&client);
-		}
-	}
-
 	pub fn check(&self, client: &MiningBlockChainClient, tx: &SignedTransaction) -> Result<bool, String> {
 		match *self {
 			ServiceTransactionAction::Refuse => Err("configured to refuse service transactions".to_owned()),

ethcore/src/miner/stratum.rs

@@ -173,8 +173,8 @@ impl StratumJobDispatcher {
 		let seed_hash = &self.seed_compute.lock().hash_block_number(number);
 		let seed_hash = H256::from_slice(&seed_hash[..]);
 		format!(
-			r#"["0x", "0x{}","0x{}","0x{}","0x{:x}"]"#,
+			r#"["0x", "0x{:x}","0x{:x}","0x{:x}","0x{:x}"]"#,
-			pow_hash.hex(), seed_hash.hex(), target.hex(), number
+			pow_hash, seed_hash, target, number
 		)
 	}
 

ethcore/src/snapshot/io.rs

@@ -156,12 +156,9 @@ impl LooseWriter {
 
 	// writing logic is the same for both kinds of chunks.
 	fn write_chunk(&mut self, hash: H256, chunk: &[u8]) -> io::Result<()> {
-		let mut file_path = self.dir.clone();
+		let file_path = self.dir.join(format!("{:x}", hash));
-		file_path.push(hash.hex());
-
 		let mut file = File::create(file_path)?;
 		file.write_all(chunk)?;
-
 		Ok(())
 	}
 }
@@ -327,14 +324,10 @@ impl SnapshotReader for LooseReader {
 	}
 
 	fn chunk(&self, hash: H256) -> io::Result<Bytes> {
-		let mut path = self.dir.clone();
+		let path = self.dir.join(format!("{:x}", hash));
-		path.push(hash.hex());
-
 		let mut buf = Vec::new();
 		let mut file = File::open(&path)?;
-
 		file.read_to_end(&mut buf)?;
-
 		Ok(buf)
 	}
 }

ethcore/src/snapshot/mod.rs

@@ -181,8 +181,8 @@ pub fn chunk_secondary<'a>(mut chunker: Box<SnapshotComponents>, chain: &'a Bloc
 			let size = compressed.len();
 
 			writer.lock().write_block_chunk(hash, compressed)?;
-			trace!(target: "snapshot", "wrote secondary chunk. hash: {}, size: {}, uncompressed size: {}",
+			trace!(target: "snapshot", "wrote secondary chunk. hash: {:x}, size: {}, uncompressed size: {}",
-				hash.hex(), size, raw_data.len());
+				hash, size, raw_data.len());
 
 			progress.size.fetch_add(size, Ordering::SeqCst);
 			chunk_hashes.push(hash);

ethcore/src/snapshot/tests/proof_of_authority.rs

@@ -23,8 +23,6 @@ use std::str::FromStr;
 use account_provider::AccountProvider;
 use client::{Client, BlockChainClient};
 use ethkey::Secret;
-use futures::Future;
-use native_contracts::test_contracts::ValidatorSet;
 use snapshot::tests::helpers as snapshot_helpers;
 use spec::Spec;
 use tests::helpers;
@@ -33,6 +31,8 @@ use transaction::{Transaction, Action, SignedTransaction};
 use ethereum_types::Address;
 use kvdb_memorydb;
 
+use_contract!(test_validator_set, "ValidatorSet", "res/contracts/test_validator_set.json");
+
 const PASS: &'static str = "";
 const TRANSITION_BLOCK_1: usize = 2; // block at which the contract becomes activated.
 const TRANSITION_BLOCK_2: usize = 10; // block at which the second contract activates.
@@ -56,7 +56,7 @@ lazy_static! {
 /// Account with secrets keccak("1") is initially the validator.
 /// Transitions to the contract at block 2, initially same validator set.
 /// Create a new Spec with AuthorityRound which uses a contract at address 5 to determine the current validators using `getValidators`.
-/// `native_contracts::test_contracts::ValidatorSet` provides a native wrapper for the ABi.
+/// `test_validator_set::ValidatorSet` provides a native wrapper for the ABi.
 fn spec_fixed_to_contract() -> Spec {
 	let data = include_bytes!("test_validator_contract.json");
 	Spec::load(&::std::env::temp_dir(), &data[..]).unwrap()
@@ -136,8 +136,7 @@ fn make_chain(accounts: Arc<AccountProvider>, blocks_beyond: usize, transitions:
 			vec![transaction]
 		};
 
-		let contract_1 = ValidatorSet::new(*CONTRACT_ADDR_1);
+		let contract = test_validator_set::ValidatorSet::default();
-		let contract_2 = ValidatorSet::new(*CONTRACT_ADDR_2);
 
 		// apply all transitions.
 		for transition in transitions {
@@ -160,34 +159,24 @@ fn make_chain(accounts: Arc<AccountProvider>, blocks_beyond: usize, transitions:
 
 			let pending = if manual {
 				trace!(target: "snapshot", "applying set transition at block #{}", num);
-				let contract = match num >= TRANSITION_BLOCK_2 {
+				let address = match num >= TRANSITION_BLOCK_2 {
-					true => &contract_2,
+					true => &CONTRACT_ADDR_2 as &Address,
-					false => &contract_1,
+					false => &CONTRACT_ADDR_1 as &Address,
 				};
 
-				let mut pending = Vec::new();
+				let data = contract.functions().set_validators().input(new_set.clone());
-				{
+				let mut nonce = nonce.borrow_mut();
-					let mut exec = |addr, data| {
+				let transaction = Transaction {
-						let mut nonce = nonce.borrow_mut();
+					nonce: *nonce,
-						let transaction = Transaction {
+					gas_price: 0.into(),
-							nonce: *nonce,
+					gas: 1_000_000.into(),
-							gas_price: 0.into(),
+					action: Action::Call(*address),
-							gas: 1_000_000.into(),
+					value: 0.into(),
-							action: Action::Call(addr),
+					data,
-							value: 0.into(),
+				}.sign(&*RICH_SECRET, client.signing_chain_id());
-							data: data,
-						}.sign(&*RICH_SECRET, client.signing_chain_id());
 
-						pending.push(transaction);
+				*nonce = *nonce + 1.into();
-
+				vec![transaction]
-						*nonce = *nonce + 1.into();
-						Ok(Vec::new())
-					};
-
-					contract.set_validators(&mut exec, new_set.clone()).wait().unwrap();
-				}
-
-				pending
 			} else {
 				make_useless_transactions()
 			};

ethcore/src/state/account.rs

@@ -486,7 +486,7 @@ impl fmt::Debug for Account {
 #[cfg(test)]
 mod tests {
 	use rlp::{UntrustedRlp, RlpType, Compressible};
-	use ethereum_types::{H256, U256, Address};
+	use ethereum_types::{H256, Address};
 	use memorydb::MemoryDB;
 	use bytes::Bytes;
 	use super::*;
@@ -508,7 +508,7 @@ mod tests {
 		let mut db = AccountDBMut::new(&mut db, &Address::new());
 		let rlp = {
 			let mut a = Account::new_contract(69.into(), 0.into());
-			a.set_storage(H256::from(&U256::from(0x00u64)), H256::from(&U256::from(0x1234u64)));
+			a.set_storage(0x00u64.into(), 0x1234u64.into());
 			a.commit_storage(&Default::default(), &mut db).unwrap();
 			a.init_code(vec![]);
 			a.commit_code(&mut db);
@@ -516,9 +516,9 @@ mod tests {
 		};
 
 		let a = Account::from_rlp(&rlp);
-		assert_eq!(a.storage_root().unwrap().hex(), "c57e1afb758b07f8d2c8f13a3b6e44fa5ff94ab266facc5a4fd3f062426e50b2");
+		assert_eq!(*a.storage_root().unwrap(), "c57e1afb758b07f8d2c8f13a3b6e44fa5ff94ab266facc5a4fd3f062426e50b2".into());
-		assert_eq!(a.storage_at(&db.immutable(), &H256::from(&U256::from(0x00u64))).unwrap(), H256::from(&U256::from(0x1234u64)));
+		assert_eq!(a.storage_at(&db.immutable(), &0x00u64.into()).unwrap(), 0x1234u64.into());
-		assert_eq!(a.storage_at(&db.immutable(), &H256::from(&U256::from(0x01u64))).unwrap(), H256::new());
+		assert_eq!(a.storage_at(&db.immutable(), &0x01u64.into()).unwrap(), H256::default());
 	}
 
 	#[test]
@@ -548,7 +548,7 @@ mod tests {
 		a.set_storage(0.into(), 0x1234.into());
 		assert_eq!(a.storage_root(), None);
 		a.commit_storage(&Default::default(), &mut db).unwrap();
-		assert_eq!(a.storage_root().unwrap().hex(), "c57e1afb758b07f8d2c8f13a3b6e44fa5ff94ab266facc5a4fd3f062426e50b2");
+		assert_eq!(*a.storage_root().unwrap(), "c57e1afb758b07f8d2c8f13a3b6e44fa5ff94ab266facc5a4fd3f062426e50b2".into());
 	}
 
 	#[test]
@@ -562,7 +562,7 @@ mod tests {
 		a.commit_storage(&Default::default(), &mut db).unwrap();
 		a.set_storage(1.into(), 0.into());
 		a.commit_storage(&Default::default(), &mut db).unwrap();
-		assert_eq!(a.storage_root().unwrap().hex(), "c57e1afb758b07f8d2c8f13a3b6e44fa5ff94ab266facc5a4fd3f062426e50b2");
+		assert_eq!(*a.storage_root().unwrap(), "c57e1afb758b07f8d2c8f13a3b6e44fa5ff94ab266facc5a4fd3f062426e50b2".into());
 	}
 
 	#[test]
@@ -574,7 +574,7 @@ mod tests {
 		assert_eq!(a.code_filth, Filth::Dirty);
 		assert_eq!(a.code_size(), Some(3));
 		a.commit_code(&mut db);
-		assert_eq!(a.code_hash().hex(), "af231e631776a517ca23125370d542873eca1fb4d613ed9b5d5335a46ae5b7eb");
+		assert_eq!(a.code_hash(), "af231e631776a517ca23125370d542873eca1fb4d613ed9b5d5335a46ae5b7eb".into());
 	}
 
 	#[test]
@@ -586,16 +586,16 @@ mod tests {
 		assert_eq!(a.code_filth, Filth::Dirty);
 		a.commit_code(&mut db);
 		assert_eq!(a.code_filth, Filth::Clean);
-		assert_eq!(a.code_hash().hex(), "af231e631776a517ca23125370d542873eca1fb4d613ed9b5d5335a46ae5b7eb");
+		assert_eq!(a.code_hash(), "af231e631776a517ca23125370d542873eca1fb4d613ed9b5d5335a46ae5b7eb".into());
 		a.reset_code(vec![0x55]);
 		assert_eq!(a.code_filth, Filth::Dirty);
 		a.commit_code(&mut db);
-		assert_eq!(a.code_hash().hex(), "37bf2238b11b68cdc8382cece82651b59d3c3988873b6e0f33d79694aa45f1be");
+		assert_eq!(a.code_hash(), "37bf2238b11b68cdc8382cece82651b59d3c3988873b6e0f33d79694aa45f1be".into());
 	}
 
 	#[test]
 	fn rlpio() {
-		let a = Account::new(U256::from(69u8), U256::from(0u8), HashMap::new(), Bytes::new());
+		let a = Account::new(69u8.into(), 0u8.into(), HashMap::new(), Bytes::new());
 		let b = Account::from_rlp(&a.rlp());
 		assert_eq!(a.balance(), b.balance());
 		assert_eq!(a.nonce(), b.nonce());
@@ -605,17 +605,17 @@ mod tests {
 
 	#[test]
 	fn new_account() {
-		let a = Account::new(U256::from(69u8), U256::from(0u8), HashMap::new(), Bytes::new());
+		let a = Account::new(69u8.into(), 0u8.into(), HashMap::new(), Bytes::new());
 		assert_eq!(a.rlp().to_hex(), "f8448045a056e81f171bcc55a6ff8345e692c0f86e5b48e01b996cadc001622fb5e363b421a0c5d2460186f7233c927e7db2dcc703c0e500b653ca82273b7bfad8045d85a470");
-		assert_eq!(a.balance(), &U256::from(69u8));
+		assert_eq!(*a.balance(), 69u8.into());
-		assert_eq!(a.nonce(), &U256::from(0u8));
+		assert_eq!(*a.nonce(), 0u8.into());
 		assert_eq!(a.code_hash(), KECCAK_EMPTY);
 		assert_eq!(a.storage_root().unwrap(), &KECCAK_NULL_RLP);
 	}
 
 	#[test]
 	fn create_account() {
-		let a = Account::new(U256::from(69u8), U256::from(0u8), HashMap::new(), Bytes::new());
+		let a = Account::new(69u8.into(), 0u8.into(), HashMap::new(), Bytes::new());
 		assert_eq!(a.rlp().to_hex(), "f8448045a056e81f171bcc55a6ff8345e692c0f86e5b48e01b996cadc001622fb5e363b421a0c5d2460186f7233c927e7db2dcc703c0e500b653ca82273b7bfad8045d85a470");
 	}
 

ethcore/src/state/mod.rs

@@ -644,7 +644,7 @@ impl<B: Backend> State<B> {
 
 	/// Mutate storage of account `a` so that it is `value` for `key`.
 	pub fn set_storage(&mut self, a: &Address, key: H256, value: H256) -> trie::Result<()> {
-		trace!(target: "state", "set_storage({}:{} to {})", a, key.hex(), value.hex());
+		trace!(target: "state", "set_storage({}:{:x} to {:x})", a, key, value);
 		if self.storage_at(a, &key)? != value {
 			self.require(a, false)?.set_storage(key, value)
 		}
@@ -2085,7 +2085,7 @@ mod tests {
 		let a = Address::zero();
 		state.require(&a, false).unwrap();
 		state.commit().unwrap();
-		assert_eq!(state.root().hex(), "0ce23f3c809de377b008a4a3ee94a0834aac8bec1f86e28ffe4fdb5a15b0c785");
+		assert_eq!(*state.root(), "0ce23f3c809de377b008a4a3ee94a0834aac8bec1f86e28ffe4fdb5a15b0c785".into());
 	}
 
 	#[test]
@@ -2122,7 +2122,7 @@ mod tests {
 	fn create_empty() {
 		let mut state = get_temp_state();
 		state.commit().unwrap();
-		assert_eq!(state.root().hex(), "56e81f171bcc55a6ff8345e692c0f86e5b48e01b996cadc001622fb5e363b421");
+		assert_eq!(*state.root(), "56e81f171bcc55a6ff8345e692c0f86e5b48e01b996cadc001622fb5e363b421".into());
 	}
 
 	#[test]

ethcore/src/tx_filter.rs

@@ -19,15 +19,15 @@
 use std::collections::HashMap;
 use std::collections::hash_map::Entry;
 use ethereum_types::{H256, Address};
-use native_contracts::TransactAcl as Contract;
 use client::{BlockChainClient, BlockId, ChainNotify};
 use bytes::Bytes;
 use parking_lot::Mutex;
-use futures::{self, Future};
 use spec::CommonParams;
 use transaction::{Action, SignedTransaction};
 use hash::KECCAK_EMPTY;
 
+use_contract!(transact_acl, "TransactAcl", "res/contracts/tx_acl.json");
+
 const MAX_CACHE_SIZE: usize = 4096;
 
 mod tx_permissions {
@@ -41,7 +41,7 @@ mod tx_permissions {
 
 /// Connection filter that uses a contract to manage permissions.
 pub struct TransactionFilter {
-	contract: Mutex<Option<Contract>>,
+	contract: transact_acl::TransactAcl,
 	contract_address: Address,
 	permission_cache: Mutex<HashMap<(H256, Address), u32>>,
 }
@@ -51,7 +51,7 @@ impl TransactionFilter {
 	pub fn from_params(params: &CommonParams) -> Option<TransactionFilter> {
 		params.transaction_permission_contract.map(|address|
 			TransactionFilter {
-				contract: Mutex::new(None),
+				contract: transact_acl::TransactAcl::default(),
 				contract_address: address,
 				permission_cache: Mutex::new(HashMap::new()),
 			}
@@ -79,23 +79,15 @@ impl TransactionFilter {
 		match cache.entry((*parent_hash, sender)) {
 			Entry::Occupied(entry) => *entry.get() & tx_type != 0,
 			Entry::Vacant(entry) => {
-				let mut contract = self.contract.lock();
+				let contract_address = self.contract_address;
-				if contract.is_none() {
+				let permissions = self.contract.functions()
-					*contract = Some(Contract::new(self.contract_address));
+					.allowed_tx_types()
-				}
+					.call(sender, &|data| client.call_contract(BlockId::Hash(*parent_hash), contract_address, data))
-
+					.map(|p| p.low_u32())
-				let permissions = match &*contract {
+					.unwrap_or_else(|e| {
-					&Some(ref contract) => {
+						debug!("Error callling tx permissions contract: {:?}", e);
-						contract.allowed_tx_types(
+						tx_permissions::NONE
-							|addr, data| futures::done(client.call_contract(BlockId::Hash(*parent_hash), addr, data)),
+					});
-							sender,
-						).wait().unwrap_or_else(|e| {
-							debug!("Error callling tx permissions contract: {:?}", e);
-							tx_permissions::NONE
-						})
-					}
-					_ => tx_permissions::NONE,
-				};
 
 				if len < MAX_CACHE_SIZE {
 					entry.insert(permissions);

ethcore/transaction/Cargo.toml

@@ -12,7 +12,7 @@ heapsize = "0.4"
 keccak-hash = { path = "../../util/hash" }
 rlp = { path = "../../util/rlp" }
 unexpected = { path = "../../util/unexpected" }
-ethereum-types = "0.1"
+ethereum-types = "0.2"
 
 [dev-dependencies]
 rustc-hex= "1.0"

ethcore/types/Cargo.toml

@@ -8,7 +8,7 @@ authors = ["Parity Technologies <admin@parity.io>"]
 rlp = { path = "../../util/rlp" }
 rlp_derive = { path = "../../util/rlp_derive" }
 ethcore-bytes = { path = "../../util/bytes" }
-ethereum-types = "0.1"
+ethereum-types = "0.2"
 ethjson = { path = "../../json" }
 keccak-hash = { path = "../../util/hash" }
 heapsize = "0.4"

ethcore/vm/Cargo.toml

@@ -6,7 +6,7 @@ authors = ["Parity Technologies <admin@parity.io>"]
 [dependencies]
 byteorder = "1.0"
 ethcore-bytes = { path = "../../util/bytes" }
-ethereum-types = "0.1"
+ethereum-types = "0.2"
 patricia-trie = { path = "../../util/patricia_trie" }
 log = "0.3"
 common-types = { path = "../types" }

ethcore/wasm/Cargo.toml

@@ -5,7 +5,7 @@ authors = ["Parity Technologies <admin@parity.io>"]
 
 [dependencies]
 byteorder = "1.0"
-ethereum-types = "0.1"
+ethereum-types = "0.2"
 log = "0.3"
 parity-wasm = "0.23"
 libc = "0.2"

ethcore/wasm/run/Cargo.toml

@@ -7,7 +7,7 @@ authors = ["Parity Technologies <admin@parity.io>"]
 serde = "1"
 serde_json = "1"
 serde_derive = "1"
-ethereum-types = "0.1"
+ethereum-types = "0.2"
 ethjson = { path = "../../../json" }
 vm = { path = "../../vm" }
 wasm = { path = "../" }

ethcrypto/Cargo.toml

@@ -8,5 +8,5 @@ rust-crypto = "0.2.36"
 tiny-keccak = "1.3"
 eth-secp256k1 = { git = "https://github.com/paritytech/rust-secp256k1" }
 ethkey = { path = "../ethkey" }
-ethereum-types = "0.1"
+ethereum-types = "0.2"
 subtle = "0.1"

ethkey/Cargo.toml

@@ -7,11 +7,11 @@ authors = ["Parity Technologies <admin@parity.io>"]
 byteorder = "1.0"
 edit-distance = "2.0"
 eth-secp256k1 = { git = "https://github.com/paritytech/rust-secp256k1" }
-ethereum-types = "0.1"
+ethereum-types = "0.2"
 lazy_static = "1.0"
 log = "0.3"
 parity-wordlist = "1.2"
-rand = "0.3.14"
+rand = "0.4"
 rust-crypto = "0.2"
 rustc-hex = "1.0"
 tiny-keccak = "1.3"

ethstore/Cargo.toml

@@ -6,7 +6,7 @@ authors = ["Parity Technologies <admin@parity.io>"]
 [dependencies]
 log = "0.3"
 libc = "0.2"
-rand = "0.3"
+rand = "0.4"
 ethkey = { path = "../ethkey" }
 serde = "1.0"
 serde_json = "1.0"
@@ -18,7 +18,7 @@ time = "0.1.34"
 itertools = "0.5"
 parking_lot = "0.5"
 ethcrypto = { path = "../ethcrypto" }
-ethereum-types = "0.1"
+ethereum-types = "0.2"
 dir = { path = "../util/dir" }
 smallvec = "0.4"
 parity-wordlist = "1.0"

evmbin/Cargo.toml

@@ -14,7 +14,7 @@ ethcore = { path = "../ethcore" }
 ethjson = { path = "../json" }
 ethcore-bytes = { path = "../util/bytes" }
 ethcore-transaction = { path = "../ethcore/transaction" }
-ethereum-types = "0.1"
+ethereum-types = "0.2"
 evm = { path = "../ethcore/evm" }
 panic_hook = { path = "../util/panic_hook" }
 rustc-hex = "1.0"

evmbin/src/display/json.rs

@@ -49,7 +49,7 @@ impl Informant {
 	}
 
 	fn stack(&self) -> String {
-		let items = self.stack.iter().map(display::u256_as_str).collect::<Vec<_>>();
+		let items = self.stack.iter().map(|i| format!("\"0x{:x}\"", i)).collect::<Vec<_>>();
 		format!("[{}]", items.join(","))
 	}
 
@@ -124,12 +124,12 @@ impl trace::VMTracer for Informant {
 		let info = ::evm::INSTRUCTIONS[self.instruction as usize];
 
 		let trace = format!(
-			"{{\"pc\":{pc},\"op\":{op},\"opName\":\"{name}\",\"gas\":{gas},\"gasCost\":{gas_cost},\"memory\":{memory},\"stack\":{stack},\"storage\":{storage},\"depth\":{depth}}}",
+			"{{\"pc\":{pc},\"op\":{op},\"opName\":\"{name}\",\"gas\":\"0x{gas:x}\",\"gasCost\":\"0x{gas_cost:x}\",\"memory\":{memory},\"stack\":{stack},\"storage\":{storage},\"depth\":{depth}}}",
 			pc = self.pc,
 			op = self.instruction,
 			name = info.name,
-			gas = display::u256_as_str(&(gas_used.saturating_add(self.gas_cost))),
+			gas = gas_used.saturating_add(self.gas_cost),
-			gas_cost = display::u256_as_str(&self.gas_cost),
+			gas_cost = self.gas_cost,
 			memory = self.memory(),
 			stack = self.stack(),
 			storage = self.storage(),

evmbin/src/display/mod.rs

@@ -17,7 +17,6 @@
 //! VM Output display utils.
 
 use std::time::Duration;
-use ethereum_types::U256;
 
 pub mod json;
 pub mod std_json;
@@ -32,13 +31,3 @@ pub fn format_time(time: &Duration) -> String {
 pub fn as_micros(time: &Duration) -> u64 {
 	time.as_secs() * 1_000_000 + time.subsec_nanos() as u64 / 1_000
 }
-
-/// Converts U256 into string.
-/// TODO Overcomes: https://github.com/paritytech/bigint/issues/13
-pub fn u256_as_str(v: &U256) -> String {
-	if v.is_zero() {
-		"\"0x0\"".into()
-	} else {
-		format!("\"{:x}\"", v)
-	}
-}

evmbin/src/display/std_json.rs

@@ -67,7 +67,7 @@ impl<T: Writer> Informant<T> {
 
 impl<T: Writer> Informant<T> {
 	fn stack(&self) -> String {
-		let items = self.stack.iter().map(display::u256_as_str).collect::<Vec<_>>();
+		let items = self.stack.iter().map(|i| format!("\"0x{:x}\"", i)).collect::<Vec<_>>();
 		format!("[{}]", items.join(","))
 	}
 
@@ -125,11 +125,11 @@ impl<T: Writer> trace::VMTracer for Informant<T> {
 
 		writeln!(
 			&mut self.sink,
-			"{{\"pc\":{pc},\"op\":{op},\"opName\":\"{name}\",\"gas\":{gas},\"stack\":{stack},\"storage\":{storage},\"depth\":{depth}}}",
+			"{{\"pc\":{pc},\"op\":{op},\"opName\":\"{name}\",\"gas\":\"0x{gas:x}\",\"stack\":{stack},\"storage\":{storage},\"depth\":{depth}}}",
 			pc = pc,
 			op = instruction,
 			name = info.name,
-			gas = display::u256_as_str(&current_gas),
+			gas = current_gas,
 			stack = stack,
 			storage = storage,
 			depth = self.depth,

hash-fetch/Cargo.toml

@@ -11,15 +11,17 @@ futures = "0.1"
 log = "0.3"
 mime = "0.3"
 mime_guess = "2.0.0-alpha.2"
-rand = "0.3"
+rand = "0.4"
 rustc-hex = "1.0"
 fetch = { path = "../util/fetch" }
 ethcore-bytes = { path = "../util/bytes" }
-ethereum-types = "0.1"
+ethereum-types = "0.2"
 parity-reactor = { path = "../util/reactor" }
-native-contracts = { path = "../ethcore/native_contracts" }
 keccak-hash = { path = "../util/hash" }
 
+ethabi = "5.1"
+ethabi-derive = "5.0"
+ethabi-contract = "5.0"
+
 [dev-dependencies]
-ethabi = "4.0"
 parking_lot = "0.5"

hash-fetch/src/client.rs

@@ -23,7 +23,7 @@ use std::path::PathBuf;
 
 use hash::keccak_buffer;
 use fetch::{Fetch, Response, Error as FetchError, Client as FetchClient};
-use futures::Future;
+use futures::{Future, IntoFuture};
 use parity_reactor::Remote;
 use urlhint::{ContractClient, URLHintContract, URLHint, URLHintResult};
 use ethereum_types::H256;
@@ -143,7 +143,7 @@ impl<F: Fetch + 'static> HashFetch for Client<F> {
 
 		let random_path = self.random_path.clone();
 		let remote_fetch = self.fetch.clone();
-		let future = self.contract.resolve(hash.to_vec())
+		let future = self.contract.resolve(hash)
 			.map_err(|e| { warn!("Error resolving URL: {}", e); Error::NoResolution })
 			.and_then(|maybe_url| maybe_url.ok_or(Error::NoResolution))
 			.map(|content| match content {
@@ -157,6 +157,7 @@ impl<F: Fetch + 'static> HashFetch for Client<F> {
 						content.url
 					},
 			})
+			.into_future()
 			.and_then(move |url| {
 				debug!(target: "fetch", "Resolved {:?} to {:?}. Fetching...", hash, url);
 				let future = remote_fetch.fetch(&url).then(move |result| {

hash-fetch/src/lib.rs

@@ -21,23 +21,25 @@
 #[macro_use]
 extern crate log;
 
+extern crate ethabi;
 extern crate ethcore_bytes as bytes;
 extern crate ethereum_types;
 extern crate futures;
 extern crate keccak_hash as hash;
 extern crate mime;
 extern crate mime_guess;
-extern crate native_contracts;
 extern crate parity_reactor;
 extern crate rand;
 extern crate rustc_hex;
 
 pub extern crate fetch;
 
+#[macro_use]
+extern crate ethabi_derive;
+#[macro_use]
+extern crate ethabi_contract;
 #[cfg(test)]
 extern crate parking_lot;
-#[cfg(test)]
-extern crate ethabi;
 
 mod client;
 

hash-fetch/src/urlhint.rs

@@ -23,13 +23,12 @@ use mime_guess;
 use hash::keccak;
 
 use futures::{future, Future};
-use native_contracts::{Registry, Urlhint};
+use futures::future::Either;
-use ethereum_types::{H160, H256, Address};
+use ethereum_types::{H256, Address};
 use bytes::Bytes;
 
-/// Boxed future that can be shared between threads.
+use_contract!(registry, "Registry", "res/registrar.json");
-/// TODO [ToDr] Use concrete types!
+use_contract!(urlhint, "Urlhint", "res/urlhint.json");
-pub type BoxFuture<A, B> = Box<Future<Item = A, Error = B> + Send>;
 
 const COMMIT_LEN: usize = 20;
 /// GithubHint entries with commit set as `0x0..01` should be treated
@@ -43,7 +42,7 @@ pub trait ContractClient: Send + Sync {
 	/// Get registrar address
 	fn registrar(&self) -> Result<Address, String>;
 	/// Call Contract
-	fn call(&self, address: Address, data: Bytes) -> BoxFuture<Bytes, String>;
+	fn call(&self, address: Address, data: Bytes) -> Box<Future<Item = Bytes, Error = String> + Send>;
 }
 
 /// Github-hosted dapp.
@@ -106,14 +105,13 @@ pub enum URLHintResult {
 /// URLHint Contract interface
 pub trait URLHint: Send + Sync {
 	/// Resolves given id to registrar entry.
-	fn resolve(&self, id: Bytes) -> BoxFuture<Option<URLHintResult>, String>;
+	fn resolve(&self, id: H256) -> Box<Future<Item = Option<URLHintResult>, Error = String> + Send>;
 }
 
 /// `URLHintContract` API
-#[derive(Clone)]
 pub struct URLHintContract {
-	urlhint: Arc<Urlhint>,
+	urlhint: urlhint::Urlhint,
-	registrar: Registry,
+	registrar: registry::Registry,
 	client: Arc<ContractClient>,
 }
 
@@ -121,9 +119,9 @@ impl URLHintContract {
 	/// Creates new `URLHintContract`
 	pub fn new(client: Arc<ContractClient>) -> Self {
 		URLHintContract {
-			urlhint: Arc::new(Urlhint::new(Default::default())),
+			urlhint: urlhint::Urlhint::default(),
-			registrar: Registry::new(Default::default()),
+			registrar: registry::Registry::default(),
-			client: client,
+			client,
 		}
 	}
 }
@@ -137,7 +135,7 @@ fn get_urlhint_content(account_slash_repo: String, owner: Address) -> Content {
 	}
 }
 
-fn decode_urlhint_output(output: (String, H160, Address)) -> Option<URLHintResult> {
+fn decode_urlhint_output(output: (String, [u8; 20], Address)) -> Option<URLHintResult> {
 	let (account_slash_repo, commit, owner) = output;
 
 	if owner == Address::default() {
@@ -173,36 +171,30 @@ fn decode_urlhint_output(output: (String, H160, Address)) -> Option<URLHintResul
 }
 
 impl URLHint for URLHintContract {
-	fn resolve(&self, id: Bytes) -> BoxFuture<Option<URLHintResult>, String> {
+	fn resolve(&self, id: H256) -> Box<Future<Item = Option<URLHintResult>, Error = String> + Send> {
-		use futures::future::Either;
+		let address = match self.client.registrar() {
-
+			Ok(a) => a,
-		let do_call = |_, data| {
+			Err(e) => return Box::new(future::err(e)),
-			let addr = match self.client.registrar() {
-				Ok(addr) => addr,
-				Err(e) => return Box::new(future::err(e))
-					as BoxFuture<Vec<u8>, _>,
-			};
-
-			self.client.call(addr, data)
 		};
 
-		let urlhint = self.urlhint.clone();
 		let client = self.client.clone();
-		Box::new(self.registrar.get_address(do_call, keccak("githubhint"), "A".into())
+		let get_address = self.registrar.functions().get_address();
-			.map(|addr| if addr == Address::default() { None } else { Some(addr) })
+		let entries = self.urlhint.functions().entries();
-			.and_then(move |address| {
+		let data = get_address.input(keccak("githubhint"), "A");
-				let mut fixed_id = [0; 32];
-				let len = ::std::cmp::min(32, id.len());
-				fixed_id[..len].copy_from_slice(&id[..len]);
 
-				match address {
+		let future = client.call(address, data)
-					None => Either::A(future::ok(None)),
+			.and_then(move |output| get_address.output(&output).map_err(|e| e.to_string()))
-					Some(address) => {
+			.and_then(move |addr| if !addr.is_zero() {
-						let do_call = move |_, data| client.call(address, data);
+				let data = entries.input(id);
-						Either::B(urlhint.entries(do_call, H256(fixed_id)).map(decode_urlhint_output))
+				let result = client.call(addr, data)
-					}
+					.and_then(move |output| entries.output(&output).map_err(|e| e.to_string()))
-				}
+					.map(decode_urlhint_output);
-			}))
+				Either::B(result)
+			} else {
+				Either::A(future::ok(None))
+			});
+
+		Box::new(future)
 	}
 }
 
@@ -270,7 +262,7 @@ pub mod tests {
 			Ok(REGISTRAR.parse().unwrap())
 		}
 
-		fn call(&self, address: Address, data: Bytes) -> BoxFuture<Bytes, String> {
+		fn call(&self, address: Address, data: Bytes) -> Box<Future<Item = Bytes, Error = String> + Send> {
 			self.calls.lock().push((address.to_hex(), data.to_hex()));
 			let res = self.responses.lock().remove(0);
 			Box::new(res.into_future())
@@ -283,7 +275,7 @@ pub mod tests {
 		let registrar = FakeRegistrar::new();
 		let resolve_result = {
 			use ethabi::{encode, Token};
-			encode(&[Token::String(String::new()), Token::FixedBytes(vec![0; 20]), Token::Address([0; 20])])
+			encode(&[Token::String(String::new()), Token::FixedBytes(vec![0; 20]), Token::Address([0; 20].into())])
 		};
 		registrar.responses.lock()[1] = Ok(resolve_result);
 
@@ -293,7 +285,7 @@ pub mod tests {
 
 
 		// when
-		let res = urlhint.resolve("test".bytes().collect()).wait().unwrap();
+		let res = urlhint.resolve("test".as_bytes().into()).wait().unwrap();
 		let calls = calls.lock();
 		let call0 = calls.get(0).expect("Registrar resolve called");
 		let call1 = calls.get(1).expect("URLHint Resolve called");
@@ -321,7 +313,7 @@ pub mod tests {
 		let urlhint = URLHintContract::new(Arc::new(registrar));
 
 		// when
-		let res = urlhint.resolve("test".bytes().collect()).wait().unwrap();
+		let res = urlhint.resolve("test".as_bytes().into()).wait().unwrap();
 
 		// then
 		assert_eq!(res, Some(URLHintResult::Dapp(GithubApp {
@@ -343,7 +335,7 @@ pub mod tests {
 		let urlhint = URLHintContract::new(Arc::new(registrar));
 
 		// when
-		let res = urlhint.resolve("test".bytes().collect()).wait().unwrap();
+		let res = urlhint.resolve("test".as_bytes().into()).wait().unwrap();
 
 		// then
 		assert_eq!(res, Some(URLHintResult::Content(Content {

hw/Cargo.toml

@@ -14,7 +14,7 @@ hidapi = { git = "https://github.com/paritytech/hidapi-rs" }
 libusb = { git = "https://github.com/paritytech/libusb-rs" }
 trezor-sys = { git = "https://github.com/paritytech/trezor-sys" }
 ethkey = { path = "../ethkey" }
-ethereum-types = "0.1"
+ethereum-types = "0.2"
 
 [dev-dependencies]
 rustc-hex = "1.0"

ipfs/Cargo.toml

@@ -8,7 +8,7 @@ authors = ["Parity Technologies <admin@parity.io>"]
 [dependencies]
 ethcore = { path = "../ethcore" }
 ethcore-bytes = { path = "../util/bytes" }
-ethereum-types = "0.1"
+ethereum-types = "0.2"
 jsonrpc-core = { git = "https://github.com/paritytech/jsonrpc.git", branch = "parity-1.10" }
 jsonrpc-http-server = { git = "https://github.com/paritytech/jsonrpc.git", branch = "parity-1.10" }
 rlp = { path = "../util/rlp" }

json/Cargo.toml

@@ -4,7 +4,7 @@ version = "0.1.0"
 authors = ["Parity Technologies <admin@parity.io>"]
 
 [dependencies]
-ethereum-types = "0.1"
+ethereum-types = "0.2"
 rustc-hex = "1.0"
 serde = "1.0"
 serde_json = "1.0"

machine/Cargo.toml

@@ -5,4 +5,4 @@ description = "Generalization of a state machine for consensus engines"
 authors = ["Parity Technologies <admin@parity.io>"]
 
 [dependencies]
-ethereum-types = "0.1"
+ethereum-types = "0.2"

miner/Cargo.toml

@@ -11,16 +11,18 @@ authors = ["Parity Technologies <admin@parity.io>"]
 hyper = { git = "https://github.com/paritytech/hyper", default-features = false }
 
 common-types = { path = "../ethcore/types" }
+ethabi = "5.1"
+ethabi-contract = "5.0"
+ethabi-derive = "5.0"
 ethash = { path = "../ethash" }
 ethcore-transaction = { path = "../ethcore/transaction" }
-ethereum-types = "0.1"
+ethereum-types = "0.2"
 ethkey = { path = "../ethkey" }
 futures = "0.1"
 heapsize = "0.4"
 keccak-hash = { path = "../util/hash" }
 linked-hash-map = "0.5"
 log = "0.3"
-native-contracts = { path = "../ethcore/native_contracts" }
 parking_lot = "0.5"
 rustc-hex = "1.0"
 table = { path = "../util/table" }

miner/src/lib.rs

@@ -20,24 +20,27 @@
 //! Keeps track of transactions and mined block.
 
 extern crate common_types as types;
-extern crate ethereum_types;
+extern crate ethabi;
 extern crate ethcore_transaction as transaction;
+extern crate ethereum_types;
 extern crate futures;
 extern crate heapsize;
 extern crate keccak_hash as hash;
 extern crate linked_hash_map;
-extern crate native_contracts;
 extern crate parking_lot;
 extern crate table;
 extern crate transient_hashmap;
 
 #[macro_use]
-extern crate log;
+extern crate ethabi_derive;
-
+#[macro_use]
-#[cfg(test)]
+extern crate ethabi_contract;
-extern crate rustc_hex;
 #[cfg(test)]
 extern crate ethkey;
+#[macro_use]
+extern crate log;
+#[cfg(test)]
+extern crate rustc_hex;
 
 pub mod banning_queue;
 pub mod external;

miner/src/service_transaction_checker.rs

@@ -16,13 +16,12 @@
 
 //! A service transactions contract checker.
 
-use futures::{future, Future};
+use ethereum_types::Address;
-use native_contracts::ServiceTransactionChecker as Contract;
-use ethereum_types::{U256, Address};
-use parking_lot::Mutex;
 use transaction::SignedTransaction;
 use types::ids::BlockId;
 
+use_contract!(service_transaction, "ServiceTransaction", "res/service_transaction.json");
+
 const SERVICE_TRANSACTION_CONTRACT_REGISTRY_NAME: &'static str = "service_transaction_checker";
 
 /// A contract calling interface.
@@ -37,34 +36,22 @@ pub trait ContractCaller {
 /// Service transactions checker.
 #[derive(Default)]
 pub struct ServiceTransactionChecker {
-	contract: Mutex<Option<Contract>>,
+	contract: service_transaction::ServiceTransaction,
 }
 
 impl ServiceTransactionChecker {
-	/// Try to create instance, reading contract address from given chain client.
-	pub fn update_from_chain_client(&self, client: &ContractCaller) {
-		let mut contract = self.contract.lock();
-		if contract.is_none() {
-			*contract = client.registry_address(SERVICE_TRANSACTION_CONTRACT_REGISTRY_NAME)
-				.and_then(|contract_addr| {
-					trace!(target: "txqueue", "Configuring for service transaction checker contract from {}", contract_addr);
-
-					Some(Contract::new(contract_addr))
-				})
-		}
-	}
-
 	/// Checks if service transaction can be appended to the transaction queue.
 	pub fn check(&self, client: &ContractCaller, tx: &SignedTransaction) -> Result<bool, String> {
-		debug_assert_eq!(tx.gas_price, U256::zero());
+		assert!(tx.gas_price.is_zero());
 
-		if let Some(ref contract) = *self.contract.lock() {
+		let address = client.registry_address(SERVICE_TRANSACTION_CONTRACT_REGISTRY_NAME)
-			contract.certified(
+			.ok_or_else(|| "contract is not configured")?;
-				|addr, data| future::done(client.call_contract(BlockId::Latest, addr, data)),
+
-				tx.sender()
+		trace!(target: "txqueue", "Checking service transaction checker contract from {}", address);
-			).wait()
+
-		} else {
+		self.contract.functions()
-			Err("contract is not configured".to_owned())
+			.certified()
-		}
+			.call(tx.sender(), &|data| client.call_contract(BlockId::Latest, address, data))
+			.map_err(|e| e.to_string())
 	}
 }

miner/src/work_notify.rs

@@ -88,8 +88,8 @@ impl NotifyWork for WorkPoster {
 		let seed_hash = &self.seed_compute.lock().hash_block_number(number);
 		let seed_hash = H256::from_slice(&seed_hash[..]);
 		let body = format!(
-			r#"{{ "result": ["0x{}","0x{}","0x{}","0x{:x}"] }}"#,
+			r#"{{ "result": ["0x{:x}","0x{:x}","0x{:x}","0x{:x}"] }}"#,
-			pow_hash.hex(), seed_hash.hex(), target.hex(), number
+			pow_hash, seed_hash, target, number
 		);
 		let mut client = self.client.lock();
 		for u in &self.urls {

parity/blockchain.rs

@@ -645,17 +645,17 @@ fn execute_export_state(cmd: ExportState) -> Result<(), String> {
 			if i != 0 {
 				out.write(b",").expect("Write error");
 			}
-			out.write_fmt(format_args!("\n\"0x{}\": {{\"balance\": \"{:x}\", \"nonce\": \"{:x}\"", account.hex(), balance, client.nonce(&account, at).unwrap_or_else(U256::zero))).expect("Write error");
+			out.write_fmt(format_args!("\n\"0x{:x}\": {{\"balance\": \"{:x}\", \"nonce\": \"{:x}\"", account, balance, client.nonce(&account, at).unwrap_or_else(U256::zero))).expect("Write error");
 			let code = client.code(&account, at).unwrap_or(None).unwrap_or_else(Vec::new);
 			if !code.is_empty() {
-				out.write_fmt(format_args!(", \"code_hash\": \"0x{}\"", keccak(&code).hex())).expect("Write error");
+				out.write_fmt(format_args!(", \"code_hash\": \"0x{:x}\"", keccak(&code))).expect("Write error");
 				if cmd.code {
 					out.write_fmt(format_args!(", \"code\": \"{}\"", code.to_hex())).expect("Write error");
 				}
 			}
 			let storage_root = client.storage_root(&account, at).unwrap_or(KECCAK_NULL_RLP);
 			if storage_root != KECCAK_NULL_RLP {
-				out.write_fmt(format_args!(", \"storage_root\": \"0x{}\"", storage_root.hex())).expect("Write error");
+				out.write_fmt(format_args!(", \"storage_root\": \"0x{:x}\"", storage_root)).expect("Write error");
 				if cmd.storage {
 					out.write_fmt(format_args!(", \"storage\": {{")).expect("Write error");
 					let mut last_storage: Option<H256> = None;
@@ -669,7 +669,7 @@ fn execute_export_state(cmd: ExportState) -> Result<(), String> {
 							if last_storage.is_some() {
 								out.write(b",").expect("Write error");
 							}
-							out.write_fmt(format_args!("\n\t\"0x{}\": \"0x{}\"", key.hex(), client.storage_at(&account, &key, at).unwrap_or_else(Default::default).hex())).expect("Write error");
+							out.write_fmt(format_args!("\n\t\"0x{:x}\": \"0x{:x}\"", key, client.storage_at(&account, &key, at).unwrap_or_else(Default::default))).expect("Write error");
 							last_storage = Some(key);
 						}
 					}

parity/configuration.rs

@@ -1384,7 +1384,13 @@ mod tests {
 			acc_conf: Default::default(),
 			gas_pricer_conf: Default::default(),
 			miner_extras: Default::default(),
-			update_policy: UpdatePolicy { enable_downloading: true, require_consensus: true, filter: UpdateFilter::Critical, track: ReleaseTrack::Unknown, path: default_hypervisor_path() },
+			update_policy: UpdatePolicy {
+				enable_downloading: true,
+				require_consensus: true,
+				filter: UpdateFilter::Critical,
+				track: ReleaseTrack::Unknown,
+				path: default_hypervisor_path()
+			},
 			mode: Default::default(),
 			tracing: Default::default(),
 			compaction: Default::default(),

parity/dapps.rs

@@ -22,7 +22,7 @@ use dir::default_data_path;
 use dir::helpers::replace_home;
 use ethcore::client::{Client, BlockChainClient, BlockId};
 use ethsync::LightSync;
-use futures::{future, IntoFuture, Future};
+use futures::{Future, future, IntoFuture};
 use hash_fetch::fetch::Client as FetchClient;
 use hash_fetch::urlhint::ContractClient;
 use light::client::LightChainClient;
@@ -70,18 +70,22 @@ pub struct FullRegistrar {
 	pub client: Arc<Client>,
 }
 
+impl FullRegistrar {
+	pub fn new(client: Arc<Client>) -> Self {
+		FullRegistrar {
+			client,
+		}
+	}
+}
+
 impl ContractClient for FullRegistrar {
 	fn registrar(&self) -> Result<Address, String> {
-		self.client.additional_params().get("registrar")
+		self.client.registrar_address()
 			 .ok_or_else(|| "Registrar not defined.".into())
-			 .and_then(|registrar| {
-				 registrar.parse().map_err(|e| format!("Invalid registrar address: {:?}", e))
-			 })
 	}
 
-	fn call(&self, address: Address, data: Bytes) -> Box<Future<Item=Bytes, Error=String> + Send> {
+	fn call(&self, address: Address, data: Bytes) -> Box<Future<Item = Bytes, Error = String> + Send> {
-		Box::new(self.client.call_contract(BlockId::Latest, address, data)
+		Box::new(self.client.call_contract(BlockId::Latest, address, data).into_future())
-			.into_future())
 	}
 }
 
@@ -104,13 +108,13 @@ impl<T: LightChainClient + 'static> ContractClient for LightRegistrar<T> {
 			 })
 	}
 
-	fn call(&self, address: Address, data: Bytes) -> Box<Future<Item=Bytes, Error=String> + Send> {
+	fn call(&self, address: Address, data: Bytes) -> Box<Future<Item = Bytes, Error = String> + Send> {
 		let header = self.client.best_block_header();
 		let env_info = self.client.env_info(BlockId::Hash(header.hash()))
 			.ok_or_else(|| format!("Cannot fetch env info for header {}", header.hash()));
 
 		let env_info = match env_info {
-			Ok(x) => x,
+			Ok(e) => e,
 			Err(e) => return Box::new(future::err(e)),
 		};
 

parity/main.rs

@@ -144,7 +144,7 @@ fn print_hash_of(maybe_file: Option<String>) -> Result<String, String> {
 	if let Some(file) = maybe_file {
 		let mut f = BufReader::new(File::open(&file).map_err(|_| "Unable to open file".to_owned())?);
 		let hash = keccak_buffer(&mut f).map_err(|_| "Unable to read from file".to_owned())?;
-		Ok(hash.hex())
+		Ok(format!("{:x}", hash))
 	} else {
 		Err("Streaming from standard input not yet supported. Specify a file.".to_owned())
 	}

parity/run.rs

@@ -35,6 +35,7 @@ use ethcore_logger::{Config as LogConfig, RotatingLogger};
 use ethsync::{self, SyncConfig};
 use fdlimit::raise_fd_limit;
 use hash_fetch::fetch::{Fetch, Client as FetchClient};
+use hash_fetch;
 use informant::{Informant, LightNodeInformantData, FullNodeInformantData};
 use journaldb::Algorithm;
 use light::Cache as LightDataCache;
@@ -304,11 +305,11 @@ fn execute_light_impl(cmd: RunCmd, can_restart: bool, logger: Arc<RotatingLogger
 	// the dapps server
 	let signer_service = Arc::new(signer::new_service(&cmd.ws_conf, &cmd.ui_conf, &cmd.logger_config));
 	let (node_health, dapps_deps) = {
-		let contract_client = Arc::new(::dapps::LightRegistrar {
+		let contract_client = ::dapps::LightRegistrar {
 			client: client.clone(),
 			sync: light_sync.clone(),
 			on_demand: on_demand.clone(),
-		});
+		};
 
 		struct LightSyncStatus(Arc<LightSync>);
 		impl fmt::Debug for LightSyncStatus {
@@ -334,7 +335,7 @@ fn execute_light_impl(cmd: RunCmd, can_restart: bool, logger: Arc<RotatingLogger
 		(node_health.clone(), dapps::Dependencies {
 			sync_status,
 			node_health,
-			contract_client: contract_client,
+			contract_client: Arc::new(contract_client),
 			fetch: fetch.clone(),
 			signer: signer_service.clone(),
 			ui_address: cmd.ui_conf.redirection_address(),
@@ -676,13 +677,14 @@ pub fn execute_impl(cmd: RunCmd, can_restart: bool, logger: Arc<RotatingLogger>)
 	// spin up event loop
 	let event_loop = EventLoop::spawn();
 
+	let contract_client = Arc::new(::dapps::FullRegistrar::new(client.clone()));
+
 	// the updater service
 	let updater = Updater::new(
 		Arc::downgrade(&(service.client() as Arc<BlockChainClient>)),
 		Arc::downgrade(&sync_provider),
 		update_policy,
-		fetch.clone(),
+		hash_fetch::Client::with_fetch(contract_client.clone(), fetch.clone(), event_loop.remote())
-		event_loop.remote(),
 	);
 	service.add_notify(updater.clone());
 
@@ -698,7 +700,6 @@ pub fn execute_impl(cmd: RunCmd, can_restart: bool, logger: Arc<RotatingLogger>)
 	// the dapps server
 	let (node_health, dapps_deps) = {
 		let (sync, client) = (sync_provider.clone(), client.clone());
-		let contract_client = Arc::new(::dapps::FullRegistrar { client: client.clone() });
 
 		struct SyncStatus(Arc<ethsync::SyncProvider>, Arc<Client>, ethsync::NetworkConfiguration);
 		impl fmt::Debug for SyncStatus {
@@ -725,7 +726,7 @@ pub fn execute_impl(cmd: RunCmd, can_restart: bool, logger: Arc<RotatingLogger>)
 		(node_health.clone(), dapps::Dependencies {
 			sync_status,
 			node_health,
-			contract_client: contract_client,
+			contract_client,
 			fetch: fetch.clone(),
 			signer: signer_service.clone(),
 			ui_address: cmd.ui_conf.redirection_address(),

rpc/Cargo.toml

@@ -16,7 +16,7 @@ log = "0.3"
 multihash ="0.7"
 order-stat = "0.1"
 parking_lot = "0.5"
-rand = "0.3"
+rand = "0.4"
 rust-crypto = "0.2"
 rustc-hex = "1.0"
 semver = "0.6"
@@ -46,7 +46,7 @@ ethcore-light = { path = "../ethcore/light" }
 ethcore-logger = { path = "../logger" }
 ethcore-miner = { path = "../miner" }
 ethcore-transaction = { path = "../ethcore/transaction" }
-ethereum-types = "0.1"
+ethereum-types = "0.2"
 
 ethcrypto = { path = "../ethcrypto" }
 ethjson = { path = "../json" }

rpc/src/v1/helpers/light_fetch.rs

@@ -455,7 +455,7 @@ fn execute_tx(gas_known: bool, params: ExecuteParams) -> BoxFuture<ExecutionResu
 						// exception?
 						if executed.exception.is_some() {
 							let old_gas = params.tx.gas;
-							params.tx.gas = params.tx.gas * 2.into();
+							params.tx.gas = params.tx.gas * 2u32;
 							if params.tx.gas > params.hdr.gas_limit() {
 								params.tx.gas = old_gas;
 							} else {

rpc/src/v1/tests/mocked/eth.rs

@@ -874,12 +874,12 @@ fn rpc_eth_sign_transaction() {
 		r#""input":"0x","# +
 		r#""nonce":"0x1","# +
 		&format!("\"publicKey\":\"0x{:?}\",", t.recover_public().unwrap()) +
-		&format!("\"r\":\"0x{}\",", U256::from(signature.r()).to_hex()) +
+		&format!("\"r\":\"0x{:x}\",", U256::from(signature.r())) +
 		&format!("\"raw\":\"0x{}\",", rlp.to_hex()) +
-		&format!("\"s\":\"0x{}\",", U256::from(signature.s()).to_hex()) +
+		&format!("\"s\":\"0x{:x}\",", U256::from(signature.s())) +
-		&format!("\"standardV\":\"0x{}\",", U256::from(t.standard_v()).to_hex()) +
+		&format!("\"standardV\":\"0x{:x}\",", U256::from(t.standard_v())) +
 		r#""to":"0xd46e8dd67c5d32be8058bb8eb970870f07244567","transactionIndex":null,"# +
-		&format!("\"v\":\"0x{}\",", U256::from(t.original_v()).to_hex()) +
+		&format!("\"v\":\"0x{:x}\",", U256::from(t.original_v())) +
 		r#""value":"0x9184e72a""# +
 		r#"}},"id":1}"#;
 

rpc/src/v1/tests/mocked/parity.rs

@@ -134,14 +134,14 @@ fn rpc_parity_accounts_info() {
 	deps.accounts.set_account_meta(address.clone(), "{foo: 69}".into()).unwrap();
 
 	let request = r#"{"jsonrpc": "2.0", "method": "parity_accountsInfo", "params": [], "id": 1}"#;
-	let response = format!("{{\"jsonrpc\":\"2.0\",\"result\":{{\"0x{}\":{{\"name\":\"Test\"}}}},\"id\":1}}", address.hex());
+	let response = format!("{{\"jsonrpc\":\"2.0\",\"result\":{{\"0x{:x}\":{{\"name\":\"Test\"}}}},\"id\":1}}", address);
 	assert_eq!(io.handle_request_sync(request), Some(response));
 
 	// Change the whitelist
 	let address = Address::from(1);
 	deps.accounts.set_new_dapps_addresses(Some(vec![address.clone()])).unwrap();
 	let request = r#"{"jsonrpc": "2.0", "method": "parity_accountsInfo", "params": [], "id": 1}"#;
-	let response = format!("{{\"jsonrpc\":\"2.0\",\"result\":{{\"0x{}\":{{\"name\":\"XX\"}}}},\"id\":1}}", address.hex());
+	let response = format!("{{\"jsonrpc\":\"2.0\",\"result\":{{\"0x{:x}\":{{\"name\":\"XX\"}}}},\"id\":1}}", address);
 	assert_eq!(io.handle_request_sync(request), Some(response));
 }
 
@@ -154,7 +154,7 @@ fn rpc_parity_default_account() {
 	// Check empty
 	let address = Address::default();
 	let request = r#"{"jsonrpc": "2.0", "method": "parity_defaultAccount", "params": [], "id": 1}"#;
-	let response = format!("{{\"jsonrpc\":\"2.0\",\"result\":\"0x{}\",\"id\":1}}", address.hex());
+	let response = format!("{{\"jsonrpc\":\"2.0\",\"result\":\"0x{:x}\",\"id\":1}}", address);
 	assert_eq!(io.handle_request_sync(request), Some(response));
 
 	// With account
@@ -164,7 +164,7 @@ fn rpc_parity_default_account() {
 	let address = accounts[0];
 
 	let request = r#"{"jsonrpc": "2.0", "method": "parity_defaultAccount", "params": [], "id": 1}"#;
-	let response = format!("{{\"jsonrpc\":\"2.0\",\"result\":\"0x{}\",\"id\":1}}", address.hex());
+	let response = format!("{{\"jsonrpc\":\"2.0\",\"result\":\"0x{:x}\",\"id\":1}}", address);
 	assert_eq!(io.handle_request_sync(request), Some(response));
 }
 

rpc/src/v1/tests/mocked/parity_accounts.rs

@@ -75,7 +75,7 @@ fn should_be_able_to_get_account_info() {
 
 	let request = r#"{"jsonrpc": "2.0", "method": "parity_allAccountsInfo", "params": [], "id": 1}"#;
 	let res = tester.io.handle_request_sync(request);
-	let response = format!("{{\"jsonrpc\":\"2.0\",\"result\":{{\"0x{}\":{{\"meta\":\"{{foo: 69}}\",\"name\":\"Test\",\"uuid\":\"{}\"}}}},\"id\":1}}", address.hex(), uuid);
+	let response = format!("{{\"jsonrpc\":\"2.0\",\"result\":{{\"0x{:x}\":{{\"meta\":\"{{foo: 69}}\",\"name\":\"Test\",\"uuid\":\"{}\"}}}},\"id\":1}}", address, uuid);
 	assert_eq!(res, Some(response));
 }
 
@@ -87,7 +87,7 @@ fn should_be_able_to_set_name() {
 	assert_eq!(accounts.len(), 1);
 	let address = accounts[0];
 
-	let request = format!(r#"{{"jsonrpc": "2.0", "method": "parity_setAccountName", "params": ["0x{}", "Test"], "id": 1}}"#, address.hex());
+	let request = format!(r#"{{"jsonrpc": "2.0", "method": "parity_setAccountName", "params": ["0x{:x}", "Test"], "id": 1}}"#, address);
 	let response = r#"{"jsonrpc":"2.0","result":true,"id":1}"#;
 	let res = tester.io.handle_request_sync(&request);
 	assert_eq!(res, Some(response.into()));
@@ -96,7 +96,7 @@ fn should_be_able_to_set_name() {
 
 	let request = r#"{"jsonrpc": "2.0", "method": "parity_allAccountsInfo", "params": [], "id": 1}"#;
 	let res = tester.io.handle_request_sync(request);
-	let response = format!("{{\"jsonrpc\":\"2.0\",\"result\":{{\"0x{}\":{{\"meta\":\"{{}}\",\"name\":\"Test\",\"uuid\":\"{}\"}}}},\"id\":1}}", address.hex(), uuid);
+	let response = format!("{{\"jsonrpc\":\"2.0\",\"result\":{{\"0x{:x}\":{{\"meta\":\"{{}}\",\"name\":\"Test\",\"uuid\":\"{}\"}}}},\"id\":1}}", address, uuid);
 	assert_eq!(res, Some(response));
 }
 
@@ -108,7 +108,7 @@ fn should_be_able_to_set_meta() {
 	assert_eq!(accounts.len(), 1);
 	let address = accounts[0];
 
-	let request = format!(r#"{{"jsonrpc": "2.0", "method": "parity_setAccountMeta", "params": ["0x{}", "{{foo: 69}}"], "id": 1}}"#, address.hex());
+	let request = format!(r#"{{"jsonrpc": "2.0", "method": "parity_setAccountMeta", "params": ["0x{:x}", "{{foo: 69}}"], "id": 1}}"#, address);
 	let response = r#"{"jsonrpc":"2.0","result":true,"id":1}"#;
 	let res = tester.io.handle_request_sync(&request);
 	assert_eq!(res, Some(response.into()));
@@ -117,7 +117,7 @@ fn should_be_able_to_set_meta() {
 
 	let request = r#"{"jsonrpc": "2.0", "method": "parity_allAccountsInfo", "params": [], "id": 1}"#;
 	let res = tester.io.handle_request_sync(request);
-	let response = format!("{{\"jsonrpc\":\"2.0\",\"result\":{{\"0x{}\":{{\"meta\":\"{{foo: 69}}\",\"name\":\"\",\"uuid\":\"{}\"}}}},\"id\":1}}", address.hex(), uuid);
+	let response = format!("{{\"jsonrpc\":\"2.0\",\"result\":{{\"0x{:x}\":{{\"meta\":\"{{foo: 69}}\",\"name\":\"\",\"uuid\":\"{}\"}}}},\"id\":1}}", address, uuid);
 	assert_eq!(res, Some(response));
 }
 
@@ -235,7 +235,7 @@ fn should_be_able_to_kill_account() {
 	let res = tester.io.handle_request_sync(&request);
 	assert_eq!(res, Some(response.into()));
 
-	let request = format!(r#"{{"jsonrpc": "2.0", "method": "parity_killAccount", "params": ["0x{}", "password"], "id": 1}}"#, address.hex());
+	let request = format!(r#"{{"jsonrpc": "2.0", "method": "parity_killAccount", "params": ["0x{:x}", "password"], "id": 1}}"#, address);
 	let response = r#"{"jsonrpc":"2.0","result":true,"id":1}"#;
 	let res = tester.io.handle_request_sync(&request);
 	assert_eq!(res, Some(response.into()));
@@ -334,7 +334,7 @@ fn rpc_parity_change_vault() {
 	let (address, _) = tester.accounts.new_account_and_public("root_password").unwrap();
 	assert!(tester.accounts.create_vault("vault1", "password1").is_ok());
 
-	let request = format!(r#"{{"jsonrpc": "2.0", "method": "parity_changeVault", "params":["0x{}", "vault1"], "id": 1}}"#, address.hex());
+	let request = format!(r#"{{"jsonrpc": "2.0", "method": "parity_changeVault", "params":["0x{:x}", "vault1"], "id": 1}}"#, address);
 	let response = r#"{"jsonrpc":"2.0","result":true,"id":1}"#;
 
 	assert_eq!(tester.io.handle_request_sync(&request), Some(response.to_owned()));
@@ -351,7 +351,7 @@ fn rpc_parity_vault_adds_vault_field_to_acount_meta() {
 	assert!(tester.accounts.change_vault(address1, "vault1").is_ok());
 
 	let request = r#"{"jsonrpc": "2.0", "method": "parity_allAccountsInfo", "params":[], "id": 1}"#;
-	let response = format!(r#"{{"jsonrpc":"2.0","result":{{"0x{}":{{"meta":"{{\"vault\":\"vault1\"}}","name":"","uuid":"{}"}}}},"id":1}}"#, address1.hex(), uuid1);
+	let response = format!(r#"{{"jsonrpc":"2.0","result":{{"0x{:x}":{{"meta":"{{\"vault\":\"vault1\"}}","name":"","uuid":"{}"}}}},"id":1}}"#, address1, uuid1);
 
 	assert_eq!(tester.io.handle_request_sync(request), Some(response.to_owned()));
 
@@ -359,7 +359,7 @@ fn rpc_parity_vault_adds_vault_field_to_acount_meta() {
 	assert!(tester.accounts.change_vault(address1, "").is_ok());
 
 	let request = r#"{"jsonrpc": "2.0", "method": "parity_allAccountsInfo", "params":[], "id": 1}"#;
-	let response = format!(r#"{{"jsonrpc":"2.0","result":{{"0x{}":{{"meta":"{{}}","name":"","uuid":"{}"}}}},"id":1}}"#, address1.hex(), uuid1);
+	let response = format!(r#"{{"jsonrpc":"2.0","result":{{"0x{:x}":{{"meta":"{{}}","name":"","uuid":"{}"}}}},"id":1}}"#, address1, uuid1);
 
 	assert_eq!(tester.io.handle_request_sync(request), Some(response.to_owned()));
 }

rpc/src/v1/tests/mocked/signer.rs

@@ -466,12 +466,12 @@ fn should_confirm_sign_transaction_with_rlp() {
 		r#""input":"0x","# +
 		r#""nonce":"0x0","# +
 		&format!("\"publicKey\":\"0x{:?}\",", t.public_key().unwrap()) +
-		&format!("\"r\":\"0x{}\",", U256::from(signature.r()).to_hex()) +
+		&format!("\"r\":\"0x{:x}\",", U256::from(signature.r())) +
 		&format!("\"raw\":\"0x{}\",", rlp.to_hex()) +
-		&format!("\"s\":\"0x{}\",", U256::from(signature.s()).to_hex()) +
+		&format!("\"s\":\"0x{:x}\",", U256::from(signature.s())) +
-		&format!("\"standardV\":\"0x{}\",", U256::from(t.standard_v()).to_hex()) +
+		&format!("\"standardV\":\"0x{:x}\",", U256::from(t.standard_v())) +
 		r#""to":"0xd46e8dd67c5d32be8058bb8eb970870f07244567","transactionIndex":null,"# +
-		&format!("\"v\":\"0x{}\",", U256::from(t.original_v()).to_hex()) +
+		&format!("\"v\":\"0x{:x}\",", U256::from(t.original_v())) +
 		r#""value":"0x1""# +
 		r#"}},"id":1}"#;
 

rpc/src/v1/tests/mocked/signing.rs

@@ -317,12 +317,12 @@ fn should_add_sign_transaction_to_the_queue() {
 		r#""input":"0x","# +
 		r#""nonce":"0x1","# +
 		&format!("\"publicKey\":\"0x{:?}\",", t.public_key().unwrap()) +
-		&format!("\"r\":\"0x{}\",", U256::from(signature.r()).to_hex()) +
+		&format!("\"r\":\"0x{:x}\",", U256::from(signature.r())) +
 		&format!("\"raw\":\"0x{}\",", rlp.to_hex()) +
-		&format!("\"s\":\"0x{}\",", U256::from(signature.s()).to_hex()) +
+		&format!("\"s\":\"0x{:x}\",", U256::from(signature.s())) +
-		&format!("\"standardV\":\"0x{}\",", U256::from(t.standard_v()).to_hex()) +
+		&format!("\"standardV\":\"0x{:x}\",", U256::from(t.standard_v())) +
 		r#""to":"0xd46e8dd67c5d32be8058bb8eb970870f07244567","transactionIndex":null,"# +
-		&format!("\"v\":\"0x{}\",", U256::from(t.original_v()).to_hex()) +
+		&format!("\"v\":\"0x{:x}\",", U256::from(t.original_v())) +
 		r#""value":"0x9184e72a""# +
 		r#"}},"id":1}"#;
 

rpc/src/v1/types/sync.rs

@@ -103,7 +103,7 @@ impl From<ethsync::EthProtocolInfo> for EthProtocolInfo {
 		EthProtocolInfo {
 			version: info.version,
 			difficulty: info.difficulty.map(Into::into),
-			head: info.head.hex(),
+			head: format!("{:x}", info.head),
 		}
 	}
 }
@@ -124,7 +124,7 @@ impl From<ethsync::PipProtocolInfo> for PipProtocolInfo {
 		PipProtocolInfo {
 			version: info.version,
 			difficulty: info.difficulty.into(),
-			head: info.head.hex(),
+			head: format!("{:x}", info.head),
 		}
 	}
 }

rpc/src/v1/types/uint.rs

@@ -102,13 +102,13 @@ impl_uint!(U64, u64, 1);
 
 impl serde::Serialize for U128 {
 	fn serialize<S>(&self, serializer: S) -> Result<S::Ok, S::Error> where S: serde::Serializer {
-		serializer.serialize_str(&format!("0x{}", self.0.to_hex()))
+		serializer.serialize_str(&format!("0x{:x}", self.0))
 	}
 }
 
 impl serde::Serialize for U256 {
 	fn serialize<S>(&self, serializer: S) -> Result<S::Ok, S::Error> where S: serde::Serializer {
-		serializer.serialize_str(&format!("0x{}", self.0.to_hex()))
+		serializer.serialize_str(&format!("0x{:x}", self.0))
 	}
 }
 

secret_store/Cargo.toml

@@ -24,7 +24,7 @@ tokio-proto = "0.1"
 url = "1.0"
 ethcore = { path = "../ethcore" }
 ethcore-bytes = { path = "../util/bytes" }
-ethereum-types = "0.1"
+ethereum-types = "0.2"
 ethsync = { path = "../sync" }
 kvdb = { path = "../util/kvdb" }
 kvdb-rocksdb = { path = "../util/kvdb-rocksdb" }
@@ -32,8 +32,10 @@ keccak-hash = { path = "../util/hash" }
 ethcore-logger = { path = "../logger" }
 ethcrypto = { path = "../ethcrypto" }
 ethkey = { path = "../ethkey" }
-native-contracts = { path = "../ethcore/native_contracts" }
 lazy_static = "1.0"
+ethabi = "5.1"
+ethabi-derive = "5.0"
+ethabi-contract = "5.0"
 
 [dev-dependencies]
 tempdir = "0.3"

secret_store/src/acl_storage.rs

@@ -16,16 +16,16 @@
 
 use std::sync::Arc;
 use std::collections::{HashMap, HashSet};
-use futures::{future, Future};
 use parking_lot::{Mutex, RwLock};
 use ethkey::public_to_address;
 use ethcore::client::{BlockChainClient, BlockId, ChainNotify};
-use native_contracts::SecretStoreAclStorage;
 use ethereum_types::{H256, Address};
 use bytes::Bytes;
 use trusted_client::TrustedClient;
 use types::all::{Error, ServerKeyId, Public};
 
+use_contract!(acl_storage, "AclStorage", "res/acl_storage.json");
+
 const ACL_CHECKER_CONTRACT_REGISTRY_NAME: &'static str = "secretstore_acl_checker";
 
 /// ACL storage of Secret Store
@@ -47,7 +47,7 @@ struct CachedContract {
 	/// Contract address.
 	contract_addr: Option<Address>,
 	/// Contract at given address.
-	contract: Option<SecretStoreAclStorage>,
+	contract: acl_storage::AclStorage,
 }
 
 /// Dummy ACL storage implementation (check always passed).
@@ -86,23 +86,20 @@ impl ChainNotify for OnChainAclStorage {
 impl CachedContract {
 	pub fn new(client: TrustedClient) -> Self {
 		CachedContract {
-			client: client,
+			client,
 			contract_addr: None,
-			contract: None,
+			contract: acl_storage::AclStorage::default(),
 		}
 	}
 
 	pub fn update(&mut self) {
 		if let Some(client) = self.client.get() {
-			let new_contract_addr = client.registry_address(ACL_CHECKER_CONTRACT_REGISTRY_NAME.to_owned());
+			match client.registry_address(ACL_CHECKER_CONTRACT_REGISTRY_NAME.to_owned()) {
-			if self.contract_addr.as_ref() != new_contract_addr.as_ref() {
+				Some(new_contract_addr) if Some(new_contract_addr).as_ref() != self.contract_addr.as_ref() => {
-				self.contract = new_contract_addr.map(|contract_addr| {
+					trace!(target: "secretstore", "Configuring for ACL checker contract from {}", new_contract_addr);
-					trace!(target: "secretstore", "Configuring for ACL checker contract from {}", contract_addr);
+					self.contract_addr = Some(new_contract_addr);
-
+				},
-					SecretStoreAclStorage::new(contract_addr)
+				Some(_) | None => ()
-				});
-
-				self.contract_addr = new_contract_addr;
 			}
 		}
 	}
@@ -110,13 +107,14 @@ impl CachedContract {
 	pub fn check(&mut self, public: &Public, document: &ServerKeyId) -> Result<bool, Error> {
 		if let Some(client) = self.client.get() {
 			// call contract to check accesss
-			match self.contract.as_ref() {
+			match self.contract_addr {
-				Some(contract) => {
+				Some(contract_address) => {
 					let address = public_to_address(&public);
-					let do_call = |a, d| future::done(client.call_contract(BlockId::Latest, a, d));
+					let do_call = |data| client.call_contract(BlockId::Latest, contract_address, data);
-					contract.check_permissions(do_call, address, document.clone())
+					self.contract.functions()
-						.map_err(|err| Error::Internal(err))
+						.check_permissions()
-						.wait()
+						.call(address, document.clone(), &do_call)
+						.map_err(|e| Error::Internal(e.to_string()))
 				},
 				None => Err(Error::Internal("ACL checker contract is not configured".to_owned())),
 			}

secret_store/src/key_server_set.rs

@@ -17,12 +17,10 @@
 use std::sync::Arc;
 use std::net::SocketAddr;
 use std::collections::{BTreeMap, HashSet};
-use futures::{future, Future, IntoFuture};
 use parking_lot::Mutex;
 use ethcore::filter::Filter;
 use ethcore::client::{Client, BlockChainClient, BlockId, ChainNotify};
 use ethkey::public_to_address;
-use native_contracts::KeyServerSet as KeyServerSetContract;
 use hash::keccak;
 use ethereum_types::{H256, Address};
 use bytes::Bytes;
@@ -30,7 +28,7 @@ use types::all::{Error, Public, NodeAddress, NodeId};
 use trusted_client::TrustedClient;
 use {NodeKeyPair};
 
-type BoxFuture<A, B> = Box<Future<Item = A, Error = B> + Send>;
+use_contract!(key_server, "KeyServerSet", "res/key_server_set.json");
 
 /// Name of KeyServerSet contract in registry.
 const KEY_SERVER_SET_CONTRACT_REGISTRY_NAME: &'static str = "secretstore_server_set";
@@ -118,7 +116,9 @@ struct CachedContract {
 	/// Blockchain client.
 	client: TrustedClient,
 	/// Contract address.
-	contract: Option<KeyServerSetContract>,
+	contract_address: Option<Address>,
+	/// Contract interface.
+	contract: key_server::KeyServerSet,
 	/// Is auto-migrate enabled?
 	auto_migrate_enabled: bool,
 	/// Current contract state.
@@ -168,6 +168,77 @@ impl ChainNotify for OnChainKeyServerSet {
 	}
 }
 
+trait KeyServerSubset<F: Fn(Vec<u8>) -> Result<Vec<u8>, String>> {
+	fn read_list(&self, f: &F) -> Result<Vec<Address>, String>;
+
+	fn read_public(&self, address: Address, f: &F) -> Result<Bytes, String>;
+
+	fn read_address(&self, address: Address, f: &F) -> Result<String, String>;
+}
+
+#[derive(Default)]
+struct CurrentKeyServerSubset {
+	read_list: key_server::functions::GetCurrentKeyServers,
+	read_public: key_server::functions::GetCurrentKeyServerPublic,
+	read_address: key_server::functions::GetCurrentKeyServerAddress,
+}
+
+impl <F: Fn(Vec<u8>) -> Result<Vec<u8>, String>> KeyServerSubset<F> for CurrentKeyServerSubset {
+	fn read_list(&self, f: &F) -> Result<Vec<Address>, String> {
+		self.read_list.call(f).map_err(|e| e.to_string())
+	}
+
+	fn read_public(&self, address: Address, f: &F) -> Result<Bytes, String> {
+		self.read_public.call(address, f).map_err(|e| e.to_string())
+	}
+
+	fn read_address(&self, address: Address, f: &F) -> Result<String, String> {
+		self.read_address.call(address, f).map_err(|e| e.to_string())
+	}
+}
+
+#[derive(Default)]
+struct MigrationKeyServerSubset {
+	read_list: key_server::functions::GetMigrationKeyServers,
+	read_public: key_server::functions::GetMigrationKeyServerPublic,
+	read_address: key_server::functions::GetMigrationKeyServerAddress,
+}
+
+impl <F: Fn(Vec<u8>) -> Result<Vec<u8>, String>> KeyServerSubset<F> for MigrationKeyServerSubset {
+	fn read_list(&self, f: &F) -> Result<Vec<Address>, String> {
+		self.read_list.call(f).map_err(|e| e.to_string())
+	}
+
+	fn read_public(&self, address: Address, f: &F) -> Result<Bytes, String> {
+		self.read_public.call(address, f).map_err(|e| e.to_string())
+	}
+
+	fn read_address(&self, address: Address, f: &F) -> Result<String, String> {
+		self.read_address.call(address, f).map_err(|e| e.to_string())
+	}
+}
+
+#[derive(Default)]
+struct NewKeyServerSubset {
+	read_list: key_server::functions::GetNewKeyServers,
+	read_public: key_server::functions::GetNewKeyServerPublic,
+	read_address: key_server::functions::GetNewKeyServerAddress,
+}
+
+impl <F: Fn(Vec<u8>) -> Result<Vec<u8>, String>> KeyServerSubset<F> for NewKeyServerSubset {
+	fn read_list(&self, f: &F) -> Result<Vec<Address>, String> {
+		self.read_list.call(f).map_err(|e| e.to_string())
+	}
+
+	fn read_public(&self, address: Address, f: &F) -> Result<Bytes, String> {
+		self.read_public.call(address, f).map_err(|e| e.to_string())
+	}
+
+	fn read_address(&self, address: Address, f: &F) -> Result<String, String> {
+		self.read_address.call(address, f).map_err(|e| e.to_string())
+	}
+}
+
 impl CachedContract {
 	pub fn new(client: TrustedClient, self_key_pair: Arc<NodeKeyPair>, auto_migrate_enabled: bool, key_servers: BTreeMap<Public, NodeAddress>) -> Result<Self, Error> {
 		let server_set = key_servers.into_iter()
@@ -179,7 +250,8 @@ impl CachedContract {
 			.collect::<Result<BTreeMap<_, _>, Error>>()?;
 		Ok(CachedContract {
 			client: client,
-			contract: None,
+			contract_address: None,
+			contract: key_server::KeyServerSet::default(),
 			auto_migrate_enabled: auto_migrate_enabled,
 			future_new_set: None,
 			confirm_migration_tx: None,
@@ -208,54 +280,40 @@ impl CachedContract {
 	}
 
 	fn start_migration(&mut self, migration_id: H256) {
-		// trust is not needed here, because it is the reaction to the read of the trusted client 
+		// trust is not needed here, because it is the reaction to the read of the trusted client
-		if let (Some(client), Some(contract)) = (self.client.get_untrusted(), self.contract.as_ref()) {
+		if let (Some(client), Some(contract_address)) = (self.client.get_untrusted(), self.contract_address) {
 			// check if we need to send start migration transaction
 			if !update_last_transaction_block(&*client, &migration_id, &mut self.start_migration_tx) {
 				return;
 			}
 
 			// prepare transaction data
-			let transaction_data = match contract.encode_start_migration_input(migration_id) {
+			let transaction_data = self.contract.functions().start_migration().input(migration_id);
-				Ok(transaction_data) => transaction_data,
-				Err(error) => {
-					warn!(target: "secretstore_net", "{}: failed to prepare auto-migration start transaction: {}",
-						self.self_key_pair.public(), error);
-					return;
-				},
-			};
 
 			// send transaction
-			if let Err(error) = client.transact_contract(contract.address.clone(), transaction_data) {
+			if let Err(error) = client.transact_contract(contract_address, transaction_data) {
 				warn!(target: "secretstore_net", "{}: failed to submit auto-migration start transaction: {}",
 					self.self_key_pair.public(), error);
 			} else {
 				trace!(target: "secretstore_net", "{}: sent auto-migration start transaction",
-					self.self_key_pair.public(), );
+					self.self_key_pair.public());
 			}
 		}
 	}
 
 	fn confirm_migration(&mut self, migration_id: H256) {
 		// trust is not needed here, because we have already completed the action
-		if let (Some(client), Some(contract)) = (self.client.get(), self.contract.as_ref()) {
+		if let (Some(client), Some(contract_address)) = (self.client.get(), self.contract_address) {
 			// check if we need to send start migration transaction
 			if !update_last_transaction_block(&*client, &migration_id, &mut self.confirm_migration_tx) {
 				return;
 			}
 
 			// prepare transaction data
-			let transaction_data = match contract.encode_confirm_migration_input(migration_id) {
+			let transaction_data = self.contract.functions().confirm_migration().input(migration_id);
-				Ok(transaction_data) => transaction_data,
-				Err(error) => {
-					warn!(target: "secretstore_net", "{}: failed to prepare auto-migration confirmation transaction: {}",
-						self.self_key_pair.public(), error);
-					return;
-				},
-			};
 
 			// send transaction
-			if let Err(error) = client.transact_contract(contract.address.clone(), transaction_data) {
+			if let Err(error) = client.transact_contract(contract_address, transaction_data) {
 				warn!(target: "secretstore_net", "{}: failed to submit auto-migration confirmation transaction: {}",
 					self.self_key_pair.public(), error);
 			} else {
@@ -270,18 +328,18 @@ impl CachedContract {
 		let new_contract_addr = client.registry_address(KEY_SERVER_SET_CONTRACT_REGISTRY_NAME.to_owned());
 
 		// new contract installed => read nodes set from the contract
-		if self.contract.as_ref().map(|c| &c.address) != new_contract_addr.as_ref() {
+		if self.contract_address.as_ref() != new_contract_addr.as_ref() {
 			self.read_from_registry(&*client, new_contract_addr);
 			return;
 		}
 
 		// check for contract events
-		let is_set_changed = self.contract.is_some() && enacted.iter()
+		let is_set_changed = self.contract_address.is_some() && enacted.iter()
 			.chain(retracted.iter())
 			.any(|block_hash| !client.logs(Filter {
 				from_block: BlockId::Hash(block_hash.clone()),
 				to_block: BlockId::Hash(block_hash.clone()),
-				address: self.contract.as_ref().map(|c| vec![c.address.clone()]),
+				address: self.contract_address.map(|address| vec![address]),
 				topics: vec![
 					Some(vec![*ADDED_EVENT_NAME_HASH, *REMOVED_EVENT_NAME_HASH,
 						*MIGRATION_STARTED_EVENT_NAME_HASH, *MIGRATION_COMPLETED_EVENT_NAME_HASH]),
@@ -299,14 +357,13 @@ impl CachedContract {
 	}
 
 	fn read_from_registry(&mut self, client: &Client, new_contract_address: Option<Address>) {
-		self.contract = new_contract_address.map(|contract_addr| {
+		if let Some(ref contract_addr) = new_contract_address {
 			trace!(target: "secretstore", "Configuring for key server set contract from {}", contract_addr);
+		}
+		self.contract_address = new_contract_address;
 
-			KeyServerSetContract::new(contract_addr)
+		let contract_address = match self.contract_address {
-		});
+			Some(contract_address) => contract_address,
-
-		let contract = match self.contract.as_ref() {
-			Some(contract) => contract,
 			None => {
 				// no contract installed => empty snapshot
 				// WARNING: after restart current_set will be reset to the set from configuration file
@@ -318,28 +375,25 @@ impl CachedContract {
 			},
 		};
 
-		let do_call = |a, d| future::done(client.call_contract(BlockId::Latest, a, d));
+		let do_call = |data| client.call_contract(BlockId::Latest, contract_address, data);
 
-		let current_set = Self::read_key_server_set(&contract, &do_call, &KeyServerSetContract::get_current_key_servers,
+		let current_set = Self::read_key_server_set(CurrentKeyServerSubset::default(), &do_call);
-			&KeyServerSetContract::get_current_key_server_public, &KeyServerSetContract::get_current_key_server_address);
 
 		// read migration-related data if auto migration is enabled
 		let (new_set, migration) = match self.auto_migrate_enabled {
 			true => {
-				let new_set = Self::read_key_server_set(&contract, &do_call, &KeyServerSetContract::get_new_key_servers,
+				let new_set = Self::read_key_server_set(NewKeyServerSubset::default(), &do_call);
-					&KeyServerSetContract::get_new_key_server_public, &KeyServerSetContract::get_new_key_server_address);
+				let migration_set = Self::read_key_server_set(MigrationKeyServerSubset::default(), &do_call);
-				let migration_set = Self::read_key_server_set(&contract, &do_call, &KeyServerSetContract::get_migration_key_servers,
-					&KeyServerSetContract::get_migration_key_server_public, &KeyServerSetContract::get_migration_key_server_address);
 
 				let migration_id = match migration_set.is_empty() {
-					false => contract.get_migration_id(&do_call).wait()
+					false => self.contract.functions().get_migration_id().call(&do_call)
 						.map_err(|err| { trace!(target: "secretstore", "Error {} reading migration id from contract", err); err })
 						.ok(),
 					true => None,
 				};
 
 				let migration_master = match migration_set.is_empty() {
-					false => contract.get_migration_master(&do_call).wait()
+					false => self.contract.functions().get_migration_master().call(&do_call)
 						.map_err(|err| { trace!(target: "secretstore", "Error {} reading migration master from contract", err); err })
 						.ok()
 						.and_then(|address| current_set.keys().chain(migration_set.keys())
@@ -350,7 +404,7 @@ impl CachedContract {
 
 				let is_migration_confirmed = match migration_set.is_empty() {
 					false if current_set.contains_key(self.self_key_pair.public()) || migration_set.contains_key(self.self_key_pair.public()) =>
-						contract.is_migration_confirmed(&do_call, self.self_key_pair.address()).wait()
+						self.contract.functions().is_migration_confirmed().call(self.self_key_pair.address(), &do_call)
 							.map_err(|err| { trace!(target: "secretstore", "Error {} reading migration confirmation from contract", err); err })
 							.ok(),
 					_ => None,
@@ -387,23 +441,19 @@ impl CachedContract {
 		self.snapshot = new_snapshot;
 	}
 
-	fn read_key_server_set<F, U, FL, FP, FA>(contract: &KeyServerSetContract, do_call: F, read_list: FL, read_public: FP, read_address: FA) -> BTreeMap<Public, SocketAddr>
+	fn read_key_server_set<T, F>(subset: T, do_call: F) -> BTreeMap<Public, SocketAddr>
 		where
-			F: FnOnce(Address, Vec<u8>) -> U + Copy,
+			T: KeyServerSubset<F>,
-			U: IntoFuture<Item=Vec<u8>, Error=String>,
+			F: Fn(Vec<u8>) -> Result<Vec<u8>, String> {
-			U::Future: Send + 'static,
-			FL: Fn(&KeyServerSetContract, F) -> BoxFuture<Vec<Address>, String>,
-			FP: Fn(&KeyServerSetContract, F, Address) -> BoxFuture<Vec<u8>, String>,
-			FA: Fn(&KeyServerSetContract, F, Address) -> BoxFuture<String, String> {
 		let mut key_servers = BTreeMap::new();
 		let mut key_servers_addresses = HashSet::new();
-		let key_servers_list = read_list(contract, do_call).wait()
+		let key_servers_list = subset.read_list(&do_call)
 			.map_err(|err| { warn!(target: "secretstore_net", "error {} reading list of key servers from contract", err); err })
 			.unwrap_or_default();
 		for key_server in key_servers_list {
-			let key_server_public = read_public(contract, do_call, key_server).wait()
+			let key_server_public = subset.read_public(key_server, &do_call)
 				.and_then(|p| if p.len() == 64 { Ok(Public::from_slice(&p)) } else { Err(format!("Invalid public length {}", p.len())) });
-			let key_server_address: Result<SocketAddr, _> = read_address(contract, do_call, key_server).wait()
+			let key_server_address: Result<SocketAddr, _> = subset.read_address(key_server, &do_call)
 				.and_then(|a| a.parse().map_err(|e| format!("Invalid ip address: {}", e)));
 
 			// only add successfully parsed nodes

secret_store/src/lib.rs

@@ -15,38 +15,42 @@
 // along with Parity.  If not, see <http://www.gnu.org/licenses/>.
 
 extern crate byteorder;
-#[macro_use]
+extern crate ethabi;
-extern crate log;
+extern crate ethcore;
-#[macro_use]
+extern crate ethcore_bytes as bytes;
-extern crate futures;
+extern crate ethcore_logger as logger;
+extern crate ethcrypto;
+extern crate ethereum_types;
+extern crate ethkey;
+extern crate ethsync;
 extern crate futures_cpupool;
 extern crate hyper;
-#[macro_use]
+extern crate keccak_hash as hash;
-extern crate lazy_static;
+extern crate kvdb;
+extern crate kvdb_rocksdb;
 extern crate parking_lot;
 extern crate rustc_hex;
 extern crate serde;
 extern crate serde_json;
-#[macro_use]
-extern crate serde_derive;
 extern crate tiny_keccak;
-extern crate tokio_io;
 extern crate tokio_core;
-extern crate tokio_service;
+extern crate tokio_io;
 extern crate tokio_proto;
+extern crate tokio_service;
 extern crate url;
 
-extern crate ethcore;
+#[macro_use]
-extern crate ethcore_bytes as bytes;
+extern crate ethabi_derive;
-extern crate ethcore_logger as logger;
+#[macro_use]
-extern crate ethereum_types;
+extern crate ethabi_contract;
-extern crate ethcrypto;
+#[macro_use]
-extern crate ethkey;
+extern crate futures;
-extern crate ethsync;
+#[macro_use]
-extern crate native_contracts;
+extern crate serde_derive;
-extern crate keccak_hash as hash;
+#[macro_use]
-extern crate kvdb;
+extern crate lazy_static;
-extern crate kvdb_rocksdb;
+#[macro_use]
+extern crate log;
 
 mod key_server_cluster;
 mod types;

secret_store/src/listener/service_contract.rs

@@ -15,18 +15,18 @@
 // along with Parity.  If not, see <http://www.gnu.org/licenses/>.
 
 use std::sync::Arc;
-use futures::{future, Future};
 use parking_lot::RwLock;
 use ethcore::filter::Filter;
 use ethcore::client::{Client, BlockChainClient, BlockId};
 use ethkey::{Public, Signature, public_to_address};
-use native_contracts::SecretStoreService;
 use hash::keccak;
-use ethereum_types::{H256, U256};
+use ethereum_types::{H256, U256, Address};
 use listener::service_contract_listener::ServiceTask;
 use trusted_client::TrustedClient;
 use {ServerKeyId, NodeKeyPair, ContractAddress};
 
+use_contract!(service, "Service", "res/service.json");
+
 /// Name of the SecretStore contract in the registry.
 const SERVICE_CONTRACT_REGISTRY_NAME: &'static str = "secretstore_service";
 
@@ -61,13 +61,15 @@ pub struct OnChainServiceContract {
 	/// Contract addresss.
 	address: ContractAddress,
 	/// Contract.
-	data: RwLock<SecretStoreServiceData>,
+	data: RwLock<ServiceData>,
 }
 
 /// On-chain service contract data.
-struct SecretStoreServiceData {
+struct ServiceData {
 	/// Contract.
-	pub contract: Arc<SecretStoreService>,
+	pub contract: service::Service,
+	/// Contract address.
+	pub contract_address: Address,
 	/// Last block we have read logs from.
 	pub last_log_block: Option<H256>,
 }
@@ -77,7 +79,9 @@ struct PendingRequestsIterator {
 	/// Blockchain client.
 	client: Arc<Client>,
 	/// Contract.
-	contract: Arc<SecretStoreService>,
+	contract: service::Service,
+	/// Contract address.
+	contract_address: Address,
 	/// This node key pair.
 	self_key_pair: Arc<NodeKeyPair>,
 	/// Block, this iterator is created for.
@@ -110,8 +114,9 @@ impl OnChainServiceContract {
 			client: client,
 			self_key_pair: self_key_pair,
 			address: address,
-			data: RwLock::new(SecretStoreServiceData {
+			data: RwLock::new(ServiceData {
-				contract: Arc::new(SecretStoreService::new(contract_addr)),
+				contract: service::Service::default(),
+				contract_address: contract_addr,
 				last_log_block: None,
 			}),
 		}
@@ -126,15 +131,15 @@ impl ServiceContract for OnChainServiceContract {
 			if let Some(client) = self.client.get() {
 				// update contract address from registry
 				let service_contract_addr = client.registry_address(SERVICE_CONTRACT_REGISTRY_NAME.to_owned()).unwrap_or_default();
-				if self.data.read().contract.address != service_contract_addr {
+				if self.data.read().contract_address != service_contract_addr {
 					trace!(target: "secretstore", "{}: installing service contract from address {}",
 						self.self_key_pair.public(), service_contract_addr);
-					self.data.write().contract = Arc::new(SecretStoreService::new(service_contract_addr));
+					self.data.write().contract_address = service_contract_addr;
 				}
 			}
 		}
 
-		self.data.read().contract.address != Default::default()
+		self.data.read().contract_address != Default::default()
 			&& self.client.get().is_some()
 	}
 
@@ -151,7 +156,7 @@ impl ServiceContract for OnChainServiceContract {
 		// prepare range of blocks to read logs from
 		let (address, first_block, last_block) = {
 			let mut data = self.data.write();
-			let address = data.contract.address.clone();
+			let address = data.contract_address;
 			let confirmed_block = match get_confirmed_block_hash(&*client, REQUEST_CONFIRMATIONS_REQUIRED) {
 				Some(confirmed_block) => confirmed_block,
 				None => return Box::new(::std::iter::empty()), // no block with enough confirmations
@@ -197,12 +202,13 @@ impl ServiceContract for OnChainServiceContract {
 		// we only need requests that are here for more than REQUEST_CONFIRMATIONS_REQUIRED blocks
 		// => we're reading from Latest - (REQUEST_CONFIRMATIONS_REQUIRED + 1) block
 		let data = self.data.read();
-		match data.contract.address == Default::default() {
+		match data.contract_address == Default::default() {
 			true => Box::new(::std::iter::empty()),
 			false => get_confirmed_block_hash(&*client, REQUEST_CONFIRMATIONS_REQUIRED + 1)
 				.and_then(|b| {
-					let do_call = |a, d| future::done(client.call_contract(BlockId::Hash(b.clone()), a, d));
+					let contract_address = data.contract_address;
-					data.contract.server_key_generation_requests_count(&do_call).wait()
+					let do_call = |data| client.call_contract(BlockId::Hash(b), contract_address, data);
+					data.contract.functions().server_key_generation_requests_count().call(&do_call)
 						.map_err(|error| {
 							warn!(target: "secretstore", "{}: call to server_key_generation_requests_count failed: {}",
 								self.self_key_pair.public(), error);
@@ -213,7 +219,8 @@ impl ServiceContract for OnChainServiceContract {
 				})
 				.map(|(b, l)| Box::new(PendingRequestsIterator {
 					client: client,
-					contract: data.contract.clone(),
+					contract: service::Service::default(),
+					contract_address: data.contract_address,
 					self_key_pair: self.self_key_pair.clone(),
 					block: b,
 					index: 0.into(),
@@ -226,7 +233,7 @@ impl ServiceContract for OnChainServiceContract {
 	fn publish_server_key(&self, server_key_id: &ServerKeyId, server_key: &Public) -> Result<(), String> {
 		// only publish if contract address is set && client is online
 		let data = self.data.read();
-		if data.contract.address == Default::default() {
+		if data.contract_address == Default::default() {
 			// it is not an error, because key could be generated even without contract
 			return Ok(());
 		}
@@ -239,9 +246,13 @@ impl ServiceContract for OnChainServiceContract {
 		// only publish key if contract waits for publication
 		// failing is ok here - it could be that enough confirmations have been recevied
 		// or key has been requested using HTTP API
-		let do_call = |a, d| future::done(client.call_contract(BlockId::Latest, a, d));
+		let contract_address = data.contract_address;
+		let do_call = |data| client.call_contract(BlockId::Latest, contract_address, data);
 		let self_address = public_to_address(self.self_key_pair.public());
-		if data.contract.get_server_key_confirmation_status(&do_call, server_key_id.clone(), self_address).wait().unwrap_or(false) {
+		if data.contract.functions()
+			.get_server_key_confirmation_status()
+			.call(*server_key_id, self_address, &do_call)
+			.unwrap_or(false) {
 			return Ok(());
 		}
 
@@ -249,16 +260,18 @@ impl ServiceContract for OnChainServiceContract {
 		let server_key_hash = keccak(server_key);
 		let signed_server_key = self.self_key_pair.sign(&server_key_hash).map_err(|e| format!("{}", e))?;
 		let signed_server_key: Signature = signed_server_key.into_electrum().into();
-		let transaction_data = data.contract.encode_server_key_generated_input(server_key_id.clone(),
+		let transaction_data = data.contract.functions()
-			server_key.to_vec(),
+			.server_key_generated()
-			signed_server_key.v(),
+			.input(*server_key_id,
-			signed_server_key.r().into(),
+				server_key.to_vec(),
-			signed_server_key.s().into()
+				signed_server_key.v(),
-		)?;
+				signed_server_key.r(),
+				signed_server_key.s(),
+			);
 
 		// send transaction
 		client.transact_contract(
-			data.contract.address.clone(),
+			data.contract_address,
 			transaction_data
 		).map_err(|e| format!("{}", e))?;
 
@@ -278,13 +291,14 @@ impl Iterator for PendingRequestsIterator {
 		self.index = self.index + 1.into();
 
 		let self_address = public_to_address(self.self_key_pair.public());
-		let do_call = |a, d| future::done(self.client.call_contract(BlockId::Hash(self.block.clone()), a, d));
+		let contract_address = self.contract_address;
-		self.contract.get_server_key_id(&do_call, index).wait()
+		let do_call = |data| self.client.call_contract(BlockId::Hash(self.block.clone()), contract_address, data);
+		self.contract.functions().get_server_key_id().call(index, &do_call)
 			.and_then(|server_key_id|
-				self.contract.get_server_key_threshold(&do_call, server_key_id.clone()).wait()
+				self.contract.functions().get_server_key_threshold().call(server_key_id, &do_call)
 					.map(|threshold| (server_key_id, threshold)))
 			.and_then(|(server_key_id, threshold)|
-				self.contract.get_server_key_confirmation_status(&do_call, server_key_id.clone(), self_address).wait()
+				self.contract.functions().get_server_key_confirmation_status().call(server_key_id, self_address, &do_call)
 					.map(|is_confirmed| (server_key_id, threshold, is_confirmed)))
 			.map(|(server_key_id, threshold, is_confirmed)|
 				Some((is_confirmed, ServiceTask::GenerateServerKey(server_key_id, threshold.into()))))

secret_store/src/listener/service_contract_listener.rs

@@ -376,7 +376,7 @@ fn is_processed_by_this_key_server(key_server_set: &KeyServerSet, self_key_pair:
 
 	let server_key_id_value: U256 = server_key_id.into();
 	let range_interval = U256::max_value() / total_servers_count.into();
-	let range_begin = (range_interval + 1.into()) * this_server_index.into();
+	let range_begin = (range_interval + 1.into()) * this_server_index as u32;
 	let range_end = range_begin.saturating_add(range_interval);
 
 	server_key_id_value >= range_begin && server_key_id_value <= range_end