Include total difficulty in CHTs and hide implementation details from consumers (#4428)
* CHT builder and prover * use CHT abstraction in provider * hide CHT internals from header chain * fix itertools conflict by updating all to 0.5 * cht proof checker, use it in on_demand
This commit is contained in:
Robert Habermeier
Arkadiy Paronyan
parent
127baed385
commit
4172a5369c
18
Cargo.lock
generated
18
Cargo.lock
generated
@ -300,6 +300,11 @@ name = "dtoa"
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version = "0.4.0"
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source = "registry+https://github.com/rust-lang/crates.io-index"
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[[package]]
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name = "either"
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version = "1.0.2"
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source = "registry+https://github.com/rust-lang/crates.io-index"
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[[package]]
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name = "elastic-array"
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version = "0.6.0"
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@ -531,6 +536,7 @@ dependencies = [
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"ethcore-network 1.6.0",
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"ethcore-util 1.6.0",
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"futures 0.1.6 (registry+https://github.com/rust-lang/crates.io-index)",
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"itertools 0.5.9 (registry+https://github.com/rust-lang/crates.io-index)",
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"log 0.3.6 (registry+https://github.com/rust-lang/crates.io-index)",
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"rand 0.3.14 (registry+https://github.com/rust-lang/crates.io-index)",
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"rlp 0.1.0",
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@ -666,7 +672,7 @@ dependencies = [
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"ethcore-bloom-journal 0.1.0",
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"ethcore-devtools 1.6.0",
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"heapsize 0.3.6 (registry+https://github.com/rust-lang/crates.io-index)",
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"itertools 0.4.13 (registry+https://github.com/rust-lang/crates.io-index)",
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"itertools 0.5.9 (registry+https://github.com/rust-lang/crates.io-index)",
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"lazy_static 0.2.1 (registry+https://github.com/rust-lang/crates.io-index)",
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"libc 0.2.16 (registry+https://github.com/rust-lang/crates.io-index)",
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"log 0.3.6 (registry+https://github.com/rust-lang/crates.io-index)",
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@ -734,7 +740,7 @@ dependencies = [
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"ethcore-util 1.6.0",
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"ethcrypto 0.1.0",
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"ethkey 0.2.0",
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"itertools 0.4.13 (registry+https://github.com/rust-lang/crates.io-index)",
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"itertools 0.5.9 (registry+https://github.com/rust-lang/crates.io-index)",
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"lazy_static 0.2.1 (registry+https://github.com/rust-lang/crates.io-index)",
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"libc 0.2.16 (registry+https://github.com/rust-lang/crates.io-index)",
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"log 0.3.6 (registry+https://github.com/rust-lang/crates.io-index)",
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@ -990,8 +996,11 @@ dependencies = [
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[[package]]
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name = "itertools"
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version = "0.4.13"
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version = "0.5.9"
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source = "registry+https://github.com/rust-lang/crates.io-index"
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dependencies = [
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"either 1.0.2 (registry+https://github.com/rust-lang/crates.io-index)",
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]
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[[package]]
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name = "itoa"
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@ -2502,6 +2511,7 @@ dependencies = [
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"checksum docopt 0.6.80 (registry+https://github.com/rust-lang/crates.io-index)" = "4cc0acb4ce0828c6a5a11d47baa432fe885881c27428c3a4e473e454ffe57a76"
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"checksum dtoa 0.2.2 (registry+https://github.com/rust-lang/crates.io-index)" = "0dd841b58510c9618291ffa448da2e4e0f699d984d436122372f446dae62263d"
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"checksum dtoa 0.4.0 (registry+https://github.com/rust-lang/crates.io-index)" = "5edd69c67b2f8e0911629b7e6b8a34cb3956613cd7c6e6414966dee349c2db4f"
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"checksum either 1.0.2 (registry+https://github.com/rust-lang/crates.io-index)" = "3d2b503c86dad62aaf414ecf2b8c527439abedb3f8d812537f0b12bfd6f32a91"
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"checksum elastic-array 0.6.0 (git+https://github.com/ethcore/elastic-array)" = "<none>"
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"checksum env_logger 0.3.3 (registry+https://github.com/rust-lang/crates.io-index)" = "aba65b63ffcc17ffacd6cf5aa843da7c5a25e3bd4bbe0b7def8b214e411250e5"
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"checksum eth-secp256k1 0.5.6 (git+https://github.com/ethcore/rust-secp256k1)" = "<none>"
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@ -2524,7 +2534,7 @@ dependencies = [
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"checksum idna 0.1.0 (registry+https://github.com/rust-lang/crates.io-index)" = "1053236e00ce4f668aeca4a769a09b3bf5a682d802abd6f3cb39374f6b162c11"
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"checksum igd 0.5.1 (registry+https://github.com/rust-lang/crates.io-index)" = "c8c12b1795b8b168f577c45fa10379b3814dcb11b7ab702406001f0d63f40484"
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"checksum isatty 0.1.1 (registry+https://github.com/rust-lang/crates.io-index)" = "7408a548dc0e406b7912d9f84c261cc533c1866e047644a811c133c56041ac0c"
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"checksum itertools 0.4.13 (registry+https://github.com/rust-lang/crates.io-index)" = "086e1fa5fe48840b1cfdef3a20c7e3115599f8d5c4c87ef32a794a7cdd184d76"
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"checksum itertools 0.5.9 (registry+https://github.com/rust-lang/crates.io-index)" = "d95557e7ba6b71377b0f2c3b3ae96c53f1b75a926a6901a500f557a370af730a"
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"checksum itoa 0.1.1 (registry+https://github.com/rust-lang/crates.io-index)" = "ae3088ea4baeceb0284ee9eea42f591226e6beaecf65373e41b38d95a1b8e7a1"
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"checksum itoa 0.3.0 (registry+https://github.com/rust-lang/crates.io-index)" = "91fd9dc2c587067de817fec4ad355e3818c3d893a78cab32a0a474c7a15bb8d5"
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"checksum jsonrpc-core 5.1.0 (git+https://github.com/ethcore/jsonrpc.git)" = "<none>"
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@ -22,6 +22,7 @@ time = "0.1"
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smallvec = "0.3.1"
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futures = "0.1"
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rand = "0.3"
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itertools = "0.5"
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[features]
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default = []
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@ -12,10 +12,154 @@
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// GNU General Public License for more details.
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//! Canonical hash trie definitions and helper functions.
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//!
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//! Each CHT is a trie mapping block numbers to canonical hashes and total difficulty.
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//! One is generated for every `SIZE` blocks, allowing us to discard those blocks in
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//! favor the the trie root. When the "ancient" blocks need to be accessed, we simply
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//! request an inclusion proof of a specific block number against the trie with the
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//! root has. A correct proof implies that the claimed block is identical to the one
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//! we discarded.
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use ethcore::ids::BlockId;
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use util::{Bytes, H256, U256, HashDB, MemoryDB};
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use util::trie::{self, TrieMut, TrieDBMut, Trie, TrieDB, Recorder};
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use rlp::{Stream, RlpStream, UntrustedRlp, View};
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// encode a key.
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macro_rules! key {
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($num: expr) => { ::rlp::encode(&$num) }
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}
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macro_rules! val {
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($hash: expr, $td: expr) => {{
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let mut stream = RlpStream::new_list(2);
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stream.append(&$hash).append(&$td);
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stream.drain()
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}}
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}
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/// The size of each CHT.
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pub const SIZE: u64 = 2048;
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/// A canonical hash trie. This is generic over any database it can query.
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/// See module docs for more details.
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#[derive(Debug, Clone)]
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pub struct CHT<DB: HashDB> {
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db: DB,
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root: H256, // the root of this CHT.
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number: u64,
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}
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impl<DB: HashDB> CHT<DB> {
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/// Query the root of the CHT.
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pub fn root(&self) -> H256 { self.root }
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/// Query the number of the CHT.
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pub fn number(&self) -> u64 { self.number }
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/// Generate an inclusion proof for the entry at a specific block.
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/// Nodes before level `from_level` will be omitted.
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/// Returns an error on an incomplete trie, and `Ok(None)` on an unprovable request.
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pub fn prove(&self, num: u64, from_level: u32) -> trie::Result<Option<Vec<Bytes>>> {
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if block_to_cht_number(num) != Some(self.number) { return Ok(None) }
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let mut recorder = Recorder::with_depth(from_level);
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let t = TrieDB::new(&self.db, &self.root)?;
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t.get_with(&key!(num), &mut recorder)?;
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Ok(Some(recorder.drain().into_iter().map(|x| x.data).collect()))
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}
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}
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/// Block information necessary to build a CHT.
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pub struct BlockInfo {
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/// The block's hash.
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pub hash: H256,
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/// The block's parent's hash.
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pub parent_hash: H256,
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/// The block's total difficulty.
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pub total_difficulty: U256,
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}
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/// Build an in-memory CHT from a closure which provides necessary information
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/// about blocks. If the fetcher ever fails to provide the info, the CHT
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/// will not be generated.
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pub fn build<F>(cht_num: u64, mut fetcher: F) -> Option<CHT<MemoryDB>>
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where F: FnMut(BlockId) -> Option<BlockInfo>
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{
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let mut db = MemoryDB::new();
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// start from the last block by number and work backwards.
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let last_num = start_number(cht_num + 1) - 1;
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let mut id = BlockId::Number(last_num);
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let mut root = H256::default();
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{
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let mut t = TrieDBMut::new(&mut db, &mut root);
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for blk_num in (0..SIZE).map(|n| last_num - n) {
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let info = match fetcher(id) {
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Some(info) => info,
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None => return None,
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};
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id = BlockId::Hash(info.parent_hash);
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t.insert(&key!(blk_num), &val!(info.hash, info.total_difficulty))
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.expect("fresh in-memory database is infallible; qed");
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}
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}
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Some(CHT {
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db: db,
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root: root,
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number: cht_num,
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})
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}
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/// Compute a CHT root from an iterator of (hash, td) pairs. Fails if shorter than
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/// SIZE items. The items are assumed to proceed sequentially from `start_number(cht_num)`.
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/// Discards the trie's nodes.
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pub fn compute_root<I>(cht_num: u64, iterable: I) -> Option<H256>
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where I: IntoIterator<Item=(H256, U256)>
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{
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let mut v = Vec::with_capacity(SIZE as usize);
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let start_num = start_number(cht_num) as usize;
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for (i, (h, td)) in iterable.into_iter().take(SIZE as usize).enumerate() {
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v.push((key!(i + start_num).to_vec(), val!(h, td).to_vec()))
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}
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if v.len() == SIZE as usize {
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Some(::util::triehash::trie_root(v))
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} else {
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None
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}
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}
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/// Check a proof for a CHT.
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/// Given a set of a trie nodes, a number to query, and a trie root,
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/// verify the given trie branch and extract the canonical hash and total difficulty.
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// TODO: better support for partially-checked queries.
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pub fn check_proof(proof: &[Bytes], num: u64, root: H256) -> Option<(H256, U256)> {
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let mut db = MemoryDB::new();
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for node in proof { db.insert(&node[..]); }
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let res = match TrieDB::new(&db, &root) {
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Err(_) => return None,
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Ok(trie) => trie.get_with(&key!(num), |val: &[u8]| {
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let rlp = UntrustedRlp::new(val);
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rlp.val_at::<H256>(0)
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.and_then(|h| rlp.val_at::<U256>(1).map(|td| (h, td)))
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.ok()
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})
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};
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match res {
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Ok(Some(Some((hash, td)))) => Some((hash, td)),
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_ => None,
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}
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}
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/// Convert a block number to a CHT number.
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/// Returns `None` for `block_num` == 0, `Some` otherwise.
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pub fn block_to_cht_number(block_num: u64) -> Option<u64> {
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@ -37,6 +181,12 @@ pub fn start_number(cht_num: u64) -> u64 {
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#[cfg(test)]
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mod tests {
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#[test]
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fn size_is_lt_usize() {
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// to ensure safe casting on the target platform.
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assert!(::cht::SIZE < usize::max_value() as u64)
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}
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#[test]
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fn block_to_cht_number() {
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assert!(::cht::block_to_cht_number(0).is_none());
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@ -173,26 +173,34 @@ impl HeaderChain {
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// produce next CHT root if it's time.
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let earliest_era = *candidates.keys().next().expect("at least one era just created; qed");
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if earliest_era + HISTORY + cht::SIZE <= number {
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let mut values = Vec::with_capacity(cht::SIZE as usize);
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{
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let mut headers = self.headers.write();
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for i in (0..cht::SIZE).map(|x| x + earliest_era) {
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let cht_num = cht::block_to_cht_number(earliest_era)
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.expect("fails only for number == 0; genesis never imported; qed");
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debug_assert_eq!(cht_num as usize, self.cht_roots.lock().len());
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let mut headers = self.headers.write();
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let cht_root = {
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let mut i = earliest_era;
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// iterable function which removes the candidates as it goes
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// along. this will only be called until the CHT is complete.
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let iter = || {
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let era_entry = candidates.remove(&i)
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.expect("all eras are sequential with no gaps; qed");
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i += 1;
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for ancient in &era_entry.candidates {
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headers.remove(&ancient.hash);
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}
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values.push((
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::rlp::encode(&i).to_vec(),
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::rlp::encode(&era_entry.canonical_hash).to_vec(),
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));
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}
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}
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let canon = &era_entry.candidates[0];
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(canon.hash, canon.total_difficulty)
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};
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cht::compute_root(cht_num, ::itertools::repeat_call(iter))
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.expect("fails only when too few items; this is checked; qed")
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};
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let cht_root = ::util::triehash::trie_root(values);
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debug!(target: "chain", "Produced CHT {} root: {:?}", (earliest_era - 1) % cht::SIZE, cht_root);
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debug!(target: "chain", "Produced CHT {} root: {:?}", cht_num, cht_root);
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self.cht_roots.lock().push(cht_root);
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}
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@ -68,6 +68,7 @@ extern crate smallvec;
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extern crate time;
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extern crate futures;
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extern crate rand;
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extern crate itertools;
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#[cfg(feature = "ipc")]
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extern crate ethcore_ipc as ipc;
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@ -29,7 +29,7 @@ use futures::sync::oneshot;
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use network::PeerId;
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use net::{Handler, Status, Capabilities, Announcement, EventContext, BasicContext, ReqId};
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use util::{Bytes, RwLock};
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use util::{Bytes, RwLock, U256};
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use types::les_request::{self as les_request, Request as LesRequest};
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pub mod request;
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@ -79,7 +79,7 @@ struct Peer {
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// Attempted request info and sender to put received value.
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enum Pending {
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HeaderByNumber(request::HeaderByNumber, Sender<encoded::Header>), // num + CHT root
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HeaderByNumber(request::HeaderByNumber, Sender<(encoded::Header, U256)>), // num + CHT root
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HeaderByHash(request::HeaderByHash, Sender<encoded::Header>),
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Block(request::Body, Sender<encoded::Block>),
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BlockReceipts(request::BlockReceipts, Sender<Vec<Receipt>>),
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@ -105,14 +105,15 @@ impl Default for OnDemand {
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impl OnDemand {
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/// Request a header by block number and CHT root hash.
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pub fn header_by_number(&self, ctx: &BasicContext, req: request::HeaderByNumber) -> Response<encoded::Header> {
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/// Returns the header and the total difficulty.
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pub fn header_by_number(&self, ctx: &BasicContext, req: request::HeaderByNumber) -> Response<(encoded::Header, U256)> {
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let (sender, receiver) = oneshot::channel();
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self.dispatch_header_by_number(ctx, req, sender);
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Response(receiver)
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}
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// dispatch the request, completing the request if no peers available.
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fn dispatch_header_by_number(&self, ctx: &BasicContext, req: request::HeaderByNumber, sender: Sender<encoded::Header>) {
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fn dispatch_header_by_number(&self, ctx: &BasicContext, req: request::HeaderByNumber, sender: Sender<(encoded::Header, U256)>) {
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let num = req.num;
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let cht_num = match ::cht::block_to_cht_number(req.num) {
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Some(cht_num) => cht_num,
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@ -21,7 +21,7 @@ use ethcore::encoded;
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use ethcore::receipt::Receipt;
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use rlp::{RlpStream, Stream, UntrustedRlp, View};
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use util::{Address, Bytes, HashDB, H256};
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use util::{Address, Bytes, HashDB, H256, U256};
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use util::memorydb::MemoryDB;
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use util::sha3::Hashable;
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use util::trie::{Trie, TrieDB, TrieError};
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@ -66,24 +66,16 @@ pub struct HeaderByNumber {
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impl HeaderByNumber {
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/// Check a response with a header and cht proof.
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pub fn check_response(&self, header: &[u8], proof: &[Bytes]) -> Result<encoded::Header, Error> {
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use util::trie::{Trie, TrieDB};
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// check the proof
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let mut db = MemoryDB::new();
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for node in proof { db.insert(&node[..]); }
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let key = ::rlp::encode(&self.num);
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let expected_hash: H256 = match TrieDB::new(&db, &self.cht_root).and_then(|t| t.get(&*key))? {
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Some(val) => ::rlp::decode(&val),
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None => return Err(Error::BadProof)
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pub fn check_response(&self, header: &[u8], proof: &[Bytes]) -> Result<(encoded::Header, U256), Error> {
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let (expected_hash, td) = match ::cht::check_proof(proof, self.num, self.cht_root) {
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Some((expected_hash, td)) => (expected_hash, td),
|
||||
None => return Err(Error::BadProof),
|
||||
};
|
||||
|
||||
// and compare the hash to the found header.
|
||||
let found_hash = header.sha3();
|
||||
match expected_hash == found_hash {
|
||||
true => Ok(encoded::Header::new(header.to_vec())),
|
||||
true => Ok((encoded::Header::new(header.to_vec()), td)),
|
||||
false => Err(Error::WrongHash(expected_hash, found_hash)),
|
||||
}
|
||||
}
|
||||
@ -191,51 +183,44 @@ impl Account {
|
||||
mod tests {
|
||||
use super::*;
|
||||
use util::{MemoryDB, Address, H256, FixedHash};
|
||||
use util::trie::{Trie, TrieMut, TrieDB, SecTrieDB, TrieDBMut, SecTrieDBMut};
|
||||
use util::trie::{Trie, TrieMut, SecTrieDB, SecTrieDBMut};
|
||||
use util::trie::recorder::Recorder;
|
||||
|
||||
use ethcore::client::{BlockChainClient, TestBlockChainClient, EachBlockWith};
|
||||
use ethcore::header::Header;
|
||||
use ethcore::encoded;
|
||||
use ethcore::receipt::Receipt;
|
||||
|
||||
#[test]
|
||||
fn check_header_by_number() {
|
||||
let mut root = H256::default();
|
||||
let mut db = MemoryDB::new();
|
||||
let mut header = Header::new();
|
||||
header.set_number(10_000);
|
||||
header.set_extra_data(b"test_header".to_vec());
|
||||
use ::cht;
|
||||
|
||||
{
|
||||
let mut trie = TrieDBMut::new(&mut db, &mut root);
|
||||
for i in (0..2048u64).map(|x| x + 8192) {
|
||||
let hash = if i == 10_000 {
|
||||
header.hash()
|
||||
} else {
|
||||
H256::random()
|
||||
};
|
||||
trie.insert(&*::rlp::encode(&i), &*::rlp::encode(&hash)).unwrap();
|
||||
}
|
||||
}
|
||||
let test_client = TestBlockChainClient::new();
|
||||
test_client.add_blocks(10500, EachBlockWith::Nothing);
|
||||
|
||||
let proof = {
|
||||
let trie = TrieDB::new(&db, &root).unwrap();
|
||||
let key = ::rlp::encode(&10_000u64);
|
||||
let mut recorder = Recorder::new();
|
||||
let cht = {
|
||||
let fetcher = |id| {
|
||||
let hdr = test_client.block_header(id).unwrap();
|
||||
let td = test_client.block_total_difficulty(id).unwrap();
|
||||
Some(cht::BlockInfo {
|
||||
hash: hdr.hash(),
|
||||
parent_hash: hdr.parent_hash(),
|
||||
total_difficulty: td,
|
||||
})
|
||||
};
|
||||
|
||||
trie.get_with(&*key, &mut recorder).unwrap().unwrap();
|
||||
|
||||
recorder.drain().into_iter().map(|r| r.data).collect::<Vec<_>>()
|
||||
cht::build(cht::block_to_cht_number(10_000).unwrap(), fetcher).unwrap()
|
||||
};
|
||||
|
||||
let proof = cht.prove(10_000, 0).unwrap().unwrap();
|
||||
let req = HeaderByNumber {
|
||||
num: 10_000,
|
||||
cht_root: root,
|
||||
cht_root: cht.root(),
|
||||
};
|
||||
|
||||
let raw_header = ::rlp::encode(&header);
|
||||
let raw_header = test_client.block_header(::ethcore::ids::BlockId::Number(10_000)).unwrap();
|
||||
|
||||
assert!(req.check_response(&*raw_header, &proof[..]).is_ok());
|
||||
assert!(req.check_response(&raw_header.into_inner(), &proof[..]).is_ok());
|
||||
}
|
||||
|
||||
#[test]
|
||||
|
||||
@ -23,6 +23,8 @@ use ethcore::transaction::PendingTransaction;
|
||||
use ethcore::ids::BlockId;
|
||||
use ethcore::encoded;
|
||||
|
||||
use cht::{self, BlockInfo};
|
||||
|
||||
use util::{Bytes, H256};
|
||||
|
||||
use request;
|
||||
@ -227,48 +229,54 @@ impl<T: ProvingBlockChainClient + ?Sized> Provider for T {
|
||||
}
|
||||
|
||||
fn header_proof(&self, req: request::HeaderProof) -> Option<(encoded::Header, Vec<Bytes>)> {
|
||||
use util::MemoryDB;
|
||||
use util::trie::{Trie, TrieMut, TrieDB, TrieDBMut, Recorder};
|
||||
|
||||
if Some(req.cht_number) != ::cht::block_to_cht_number(req.block_number) {
|
||||
if Some(req.cht_number) != cht::block_to_cht_number(req.block_number) {
|
||||
debug!(target: "les_provider", "Requested CHT number mismatch with block number.");
|
||||
return None;
|
||||
}
|
||||
|
||||
let mut memdb = MemoryDB::new();
|
||||
let mut root = H256::default();
|
||||
let mut needed_hdr = None;
|
||||
{
|
||||
let mut t = TrieDBMut::new(&mut memdb, &mut root);
|
||||
let start_num = ::cht::start_number(req.cht_number);
|
||||
for i in (0..::cht::SIZE).map(|x| x + start_num) {
|
||||
match self.block_header(BlockId::Number(i)) {
|
||||
None => return None,
|
||||
Some(hdr) => {
|
||||
t.insert(
|
||||
&*::rlp::encode(&i),
|
||||
&*::rlp::encode(&hdr.hash()),
|
||||
).expect("fresh in-memory database is infallible; qed");
|
||||
|
||||
if i == req.block_number { needed_hdr = Some(hdr) }
|
||||
// build the CHT, caching the requested header as we pass through it.
|
||||
let cht = {
|
||||
let block_info = |id| {
|
||||
let hdr = self.block_header(id);
|
||||
let td = self.block_total_difficulty(id);
|
||||
|
||||
match (hdr, td) {
|
||||
(Some(hdr), Some(td)) => {
|
||||
let info = BlockInfo {
|
||||
hash: hdr.hash(),
|
||||
parent_hash: hdr.parent_hash(),
|
||||
total_difficulty: td,
|
||||
};
|
||||
|
||||
if hdr.number() == req.block_number {
|
||||
needed_hdr = Some(hdr);
|
||||
}
|
||||
|
||||
Some(info)
|
||||
}
|
||||
_ => None,
|
||||
}
|
||||
};
|
||||
|
||||
match cht::build(req.cht_number, block_info) {
|
||||
Some(cht) => cht,
|
||||
None => return None, // incomplete CHT.
|
||||
}
|
||||
}
|
||||
};
|
||||
|
||||
let needed_hdr = needed_hdr.expect("`needed_hdr` always set in loop, number checked before; qed");
|
||||
|
||||
let mut recorder = Recorder::with_depth(req.from_level);
|
||||
let t = TrieDB::new(&memdb, &root)
|
||||
.expect("Same DB and root as just produced by TrieDBMut; qed");
|
||||
|
||||
if let Err(e) = t.get_with(&*::rlp::encode(&req.block_number), &mut recorder) {
|
||||
debug!(target: "les_provider", "Error looking up number in freshly-created CHT: {}", e);
|
||||
return None;
|
||||
// prove our result.
|
||||
match cht.prove(req.block_number, req.from_level) {
|
||||
Ok(Some(proof)) => Some((needed_hdr, proof)),
|
||||
Ok(None) => None,
|
||||
Err(e) => {
|
||||
debug!(target: "les_provider", "Error looking up number in freshly-created CHT: {}", e);
|
||||
None
|
||||
}
|
||||
}
|
||||
|
||||
// TODO: cache calculated CHT if possible.
|
||||
let proof = recorder.drain().into_iter().map(|x| x.data).collect();
|
||||
Some((needed_hdr, proof))
|
||||
}
|
||||
|
||||
fn ready_transactions(&self) -> Vec<PendingTransaction> {
|
||||
|
||||
@ -552,7 +552,7 @@ impl BlockChainClient for TestBlockChainClient {
|
||||
let mut adding = false;
|
||||
|
||||
let mut blocks = Vec::new();
|
||||
for (_, hash) in numbers_read.iter().sort_by(|tuple1, tuple2| tuple1.0.cmp(tuple2.0)) {
|
||||
for (_, hash) in numbers_read.iter().sorted_by(|tuple1, tuple2| tuple1.0.cmp(tuple2.0)) {
|
||||
if hash == to {
|
||||
if adding {
|
||||
blocks.push(hash.clone());
|
||||
|
||||
@ -18,7 +18,7 @@ tiny-keccak = "1.0"
|
||||
docopt = { version = "0.6", optional = true }
|
||||
time = "0.1.34"
|
||||
lazy_static = "0.2"
|
||||
itertools = "0.4"
|
||||
itertools = "0.5"
|
||||
parking_lot = "0.3"
|
||||
ethcrypto = { path = "../ethcrypto" }
|
||||
ethcore-util = { path = "../util" }
|
||||
|
||||
@ -21,7 +21,7 @@ rust-crypto = "0.2.34"
|
||||
elastic-array = { git = "https://github.com/ethcore/elastic-array" }
|
||||
rlp = { path = "rlp" }
|
||||
heapsize = { version = "0.3", features = ["unstable"] }
|
||||
itertools = "0.4"
|
||||
itertools = "0.5"
|
||||
sha3 = { path = "sha3" }
|
||||
clippy = { version = "0.0.103", optional = true}
|
||||
ethcore-devtools = { path = "../devtools" }
|
||||
|
||||
@ -77,7 +77,9 @@ pub fn ordered_trie_root<I>(input: I) -> H256
|
||||
/// assert_eq!(trie_root(v), H256::from_str(root).unwrap());
|
||||
/// }
|
||||
/// ```
|
||||
pub fn trie_root(input: Vec<(Vec<u8>, Vec<u8>)>) -> H256 {
|
||||
pub fn trie_root<I>(input: I) -> H256
|
||||
where I: IntoIterator<Item=(Vec<u8>, Vec<u8>)>
|
||||
{
|
||||
let gen_input = input
|
||||
// first put elements into btree to sort them and to remove duplicates
|
||||
.into_iter()
|
||||
|
||||
Loading…
Reference in New Issue
Block a user