Backport Core PRs to beta (#7891)

* update back-references more aggressively after answering from cache (#7578)

* Add new EF ropstens nodes. (#7824)

* Add new EF ropstens nodes.

* Fix tests

* Add a timeout for light client sync requests (#7848)

* Add a timeout for light client sync requests

* Adjusting timeout to number of headers

* Flush keyfiles. Resolves #7632 (#7868)

* Fix wallet import (#7873)

* rpc: generate new account id for imported wallets

* ethstore: handle duplicate wallet filenames

* ethstore: simplify deduplication of wallet file names

* ethstore: do not dedup wallet filenames on update

* ethstore: fix minor grumbles

* [WASM] mem_cmp added to the Wasm runtime (#7539)

* mem_cmp added to the Wasm runtime

* schedule.wasm.mem_copy to schedule.wasm.mem_cmp for mem_cmp

* [Wasm] memcmp fix and test added (#7590)

* [Wasm] memcmp fix and test added

* [Wasm] use reqrep_test! macro for memcmp test

* wasmi interpreter (#7796)

* adjust storage update evm-style (#7812)

* disable internal memory (#7842)

ethcore/light/src/on_demand/mod.rs

@@ -90,7 +90,14 @@ impl Pending {
 			match self.requests[idx].respond_local(cache) {
 				Some(response) => {
 					self.requests.supply_response_unchecked(&response);
+
+					// update header and back-references after each from-cache
+					// response to ensure that the requests are left in a consistent
+					// state and increase the likelihood of being able to answer
+					// the next request from cache.
 					self.update_header_refs(idx, &response);
+					self.fill_unanswered();
+
 					self.responses.push(response);
 				}
 				None => break,

ethcore/res/ethereum/ropsten.json

@@ -54,8 +54,8 @@
 	"nodes": [
 		"enode://6332792c4a00e3e4ee0926ed89e0d27ef985424d97b6a45bf0f23e51f0dcb5e66b875777506458aea7af6f9e4ffb69f43f3778ee73c81ed9d34c51c4b16b0b0f@52.232.243.152:30303",
 		"enode://94c15d1b9e2fe7ce56e458b9a3b672ef11894ddedd0c6f247e0f1d3487f52b66208fb4aeb8179fce6e3a749ea93ed147c37976d67af557508d199d9594c35f09@192.81.208.223:30303",
-		"enode://20c9ad97c081d63397d7b685a412227a40e23c8bdc6688c6f37e97cfbc22d2b4d1db1510d8f61e6a8866ad7f0e17c02b14182d37ea7c3c8b9c2683aeb6b733a1@52.169.14.227:30303",
-		"enode://6ce05930c72abc632c58e2e4324f7c7ea478cec0ed4fa2528982cf34483094e9cbc9216e7aa349691242576d552a2a56aaeae426c5303ded677ce455ba1acd9d@13.84.180.240:30303"
+		"enode://30b7ab30a01c124a6cceca36863ece12c4f5fa68e3ba9b0b51407ccc002eeed3b3102d20a88f1c1d3c3154e2449317b8ef95090e77b312d5cc39354f86d5d606@52.176.7.10:30303",
+		"enode://865a63255b3bb68023b6bffd5095118fcc13e79dcf014fe4e47e065c350c7cc72af2e53eff895f11ba1bbb6a2b33271c1116ee870f266618eadfc2e78aa7349c@52.176.100.77:30303"
 	],
 	"accounts": {
 		"0000000000000000000000000000000000000000": { "balance": "1" },

ethcore/src/account_provider/mod.rs

@@ -264,9 +264,9 @@ impl AccountProvider {
 		Ok(Address::from(account.address).into())
 	}
 
-	/// Import a new presale wallet.
-	pub fn import_wallet(&self, json: &[u8], password: &str) -> Result<Address, Error> {
-		let account = self.sstore.import_wallet(SecretVaultRef::Root, json, password)?;
+	/// Import a new wallet.
+	pub fn import_wallet(&self, json: &[u8], password: &str, gen_id: bool) -> Result<Address, Error> {
+		let account = self.sstore.import_wallet(SecretVaultRef::Root, json, password, gen_id)?;
 		if self.blacklisted_accounts.contains(&account.address) {
 			self.sstore.remove_account(&account, password)?;
 			return Err(SSError::InvalidAccount.into());

ethcore/src/executive.rs

@@ -156,11 +156,7 @@ impl TransactOptions<trace::NoopTracer, trace::NoopVMTracer> {
 
 pub fn executor(machine: &Machine, vm_factory: &Factory, params: &ActionParams) -> Box<vm::Vm> {
 	if machine.supports_wasm() && params.code.as_ref().map_or(false, |code| code.len() > 4 && &code[0..4] == WASM_MAGIC_NUMBER) {
-		Box::new(
-			wasm::WasmInterpreter::new()
-				// prefer to fail fast
-				.expect("Failed to create wasm runtime")
-		)
+		Box::new(wasm::WasmInterpreter)
 	} else {
 		vm_factory.create(params.gas)
 	}

ethcore/vm/src/schedule.rs

@@ -127,18 +127,19 @@ pub struct WasmCosts {
 	pub mul: u32,
 	/// Memory (load/store) operations multiplier.
 	pub mem: u32,
-	/// Memory copy operation, per byte.
-	pub mem_copy: u32,
-	/// Memory move operation, per byte.
-	pub mem_move: u32,
-	/// Memory set operation, per byte.
-	pub mem_set: u32,
-	/// Static region charge, per byte.
-	pub static_region: u32,
 	/// General static query of U256 value from env-info
 	pub static_u256: u32,
 	/// General static query of Address value from env-info
 	pub static_address: u32,
+	/// Memory stipend. Amount of free memory (in 64kb pages) each contract can use for stack.
+	pub initial_mem: u32,
+	/// Grow memory cost, per page (64kb)
+	pub grow_mem: u32,
+	/// Cost of wasm opcode is calculated as TABLE_ENTRY_COST * `opcodes_mul` / `opcodes_div`
+	pub opcodes_mul: u32,
+	/// Cost of wasm opcode is calculated as TABLE_ENTRY_COST * `opcodes_mul` / `opcodes_div`
+	pub opcodes_div: u32,
+
 }
 
 impl Default for WasmCosts {
@@ -148,12 +149,12 @@ impl Default for WasmCosts {
 			div: 16,
 			mul: 4,
 			mem: 2,
-			mem_copy: 1,
-			mem_move: 1,
-			mem_set: 1,
-			static_region: 1,
 			static_u256: 64,
 			static_address: 40,
+			initial_mem: 4096,
+			grow_mem: 8192,
+			opcodes_mul: 3,
+			opcodes_div: 8,
 		}
 	}
 }

ethcore/wasm/Cargo.toml

@@ -8,7 +8,9 @@ byteorder = "1.0"
 ethcore-util = { path = "../../util" }
 ethcore-bigint = { path = "../../util/bigint" }
 log = "0.3"
-parity-wasm = "0.15"
+parity-wasm = "0.23"
+libc = "0.2"
 wasm-utils = { git = "https://github.com/paritytech/wasm-utils" }
 vm = { path = "../vm" }
 ethcore-logger = { path = "../../logger" }
+wasmi = { git = "https://github.com/pepyakin/wasmi" }

ethcore/wasm/run/src/runner.rs

@@ -16,7 +16,7 @@ fn load_code<P: AsRef<path::Path>>(p: P) -> io::Result<Vec<u8>> {
 }
 
 fn wasm_interpreter() -> WasmInterpreter {
-	WasmInterpreter::new().expect("wasm interpreter to create without errors")
+	WasmInterpreter
 }
 
 #[derive(Debug)]