Merge branch 'master' into gav

.gitignore

@@ -10,8 +10,7 @@
 Cargo.lock
 
 # Generated by Cargo
-/target/
-/util/target
+**/target/
 
 # vim stuff
 *.swp

Cargo.toml

@@ -18,6 +18,7 @@ rust-crypto = "0.2.34"
 time = "0.1"
 #interpolate_idents = { git = "https://github.com/SkylerLipthay/interpolate_idents" }
 evmjit = { path = "rust-evmjit", optional = true }
+ethash = { path = "ethash" }
 
 [features]
 jit = ["evmjit"]

ethash/Cargo.toml

@@ -0,0 +1,9 @@
+[package]
+name = "ethash"
+version = "0.1.0"
+authors = ["arkpar <arkadiy@ethcore.io"]
+
+[lib]
+
+[dependencies]
+tiny-keccak = "1.0"

ethash/src/compute.rs

@@ -0,0 +1,294 @@
+//! Ethash implementation
+//! See https://github.com/ethereum/wiki/wiki/Ethash
+
+// TODO: fix endianess for big endian
+
+use std::mem;
+use std::ptr;
+use sizes::{CACHE_SIZES, DAG_SIZES};
+use tiny_keccak::Keccak;
+
+pub const ETHASH_EPOCH_LENGTH: u64 = 30000;
+pub const ETHASH_CACHE_ROUNDS: usize = 3;
+pub const ETHASH_MIX_BYTES: usize = 128;
+pub const ETHASH_ACCESSES:usize =  64;
+pub const ETHASH_DATASET_PARENTS:u32 = 256;
+
+const NODE_WORDS: usize = 64 / 4;
+const NODE_BYTES: usize = 64;
+const MIX_WORDS: usize = ETHASH_MIX_BYTES / 4;
+const MIX_NODES: usize = MIX_WORDS / NODE_WORDS;
+const FNV_PRIME: u32 =  0x01000193;
+
+/// Computation result
+pub struct ProofOfWork {
+	/// Difficulty boundary
+	pub value: H256,
+	/// Mix
+	pub mix_hash: H256
+}
+
+struct Node {
+	bytes: [u8; NODE_BYTES],
+}
+
+impl Default for Node {
+	fn default() -> Self { 
+		Node { bytes: [0u8; NODE_BYTES] }
+	}
+}
+
+impl Clone for Node {
+	fn clone(&self) -> Self {
+		Node { bytes: *&self.bytes }
+	}
+}
+
+impl Node {
+	#[inline]
+	fn as_words(&self) -> &[u32; NODE_WORDS] {
+		unsafe { mem::transmute(&self.bytes) }
+	}
+
+	#[inline]
+	fn as_words_mut(&mut self) -> &mut [u32; NODE_WORDS] {
+		unsafe { mem::transmute(&mut self.bytes) }
+	}
+}
+
+pub type H256 = [u8; 32];
+
+pub struct Light {
+	block_number: u64,
+	cache: Vec<Node>,
+}
+
+/// Light cache structur
+impl Light {
+	/// Create a new light cache for a given block number
+	pub fn new(block_number: u64) -> Light {
+		light_new(block_number)
+	}
+
+	/// Calculate the light boundary data
+	/// `header_hash` - The header hash to pack into the mix
+	/// `nonce` - The nonce to pack into the mix
+	pub fn compute(&self, header_hash: &H256, nonce: u64) -> ProofOfWork {
+		light_compute(self, header_hash, nonce)
+	}
+}
+
+#[inline]
+fn fnv_hash(x: u32, y: u32) -> u32 {
+	return x.wrapping_mul(FNV_PRIME) ^ y;
+}
+
+#[inline]
+fn sha3_512(input: &[u8], output: &mut [u8]) {
+		let mut sha3 = Keccak::new_keccak512();
+		sha3.update(input);
+		sha3.finalize(output);
+}
+
+#[inline]
+fn get_cache_size(block_number: u64) -> usize {
+	assert!(block_number / ETHASH_EPOCH_LENGTH < 2048);
+	return CACHE_SIZES[(block_number / ETHASH_EPOCH_LENGTH) as usize] as usize;
+}
+
+#[inline]
+fn get_data_size(block_number: u64) -> usize {
+	assert!(block_number / ETHASH_EPOCH_LENGTH < 2048);
+	return DAG_SIZES[(block_number / ETHASH_EPOCH_LENGTH) as usize] as usize;
+}
+
+#[inline]
+fn get_seedhash(block_number: u64) -> H256 {
+	let epochs = block_number / ETHASH_EPOCH_LENGTH;
+	let mut ret: H256 = [0u8; 32];
+	for _ in 0..epochs {
+		let mut sha3 = Keccak::new_keccak256();
+		sha3.update(&ret);
+		sha3.finalize(&mut ret);
+	}
+	ret
+}
+
+/// Difficulty quick check for POW preverification
+///
+/// `header_hash`      The hash of the header
+/// `nonce`            The block's nonce
+/// `mix_hash`         The mix digest hash
+/// Boundary recovered from mix hash
+pub fn quick_get_difficulty(header_hash: &H256, nonce: u64, mix_hash: &H256) -> H256 {
+	let mut buf = [0u8; 64 + 32];
+	unsafe { ptr::copy_nonoverlapping(header_hash.as_ptr(), buf.as_mut_ptr(), 32) };
+	unsafe { ptr::copy_nonoverlapping(mem::transmute(&nonce), buf[32..].as_mut_ptr(), 8) };
+
+	let mut sha3 = Keccak::new_keccak512();
+	sha3.update(&buf[0..40]);
+	sha3.finalize(&mut buf);
+	unsafe { ptr::copy_nonoverlapping(mix_hash.as_ptr(), buf[64..].as_mut_ptr(), 32) };
+
+	let mut hash = [0u8; 32];
+	let mut sha3 = Keccak::new_keccak256();
+	sha3.update(&buf);
+	sha3.finalize(&mut hash);
+	hash
+}
+
+/// Calculate the light client data
+/// `light` - The light client handler
+/// `header_hash` - The header hash to pack into the mix
+/// `nonce` - The nonce to pack into the mix
+pub fn light_compute(light: &Light, header_hash: &H256, nonce: u64) -> ProofOfWork {
+	let full_size = get_data_size(light.block_number);
+	hash_compute(light, full_size, header_hash, nonce)
+}
+
+fn hash_compute(light: &Light, full_size: usize,  header_hash: &H256, nonce: u64) -> ProofOfWork {
+	if full_size % MIX_WORDS != 0 {
+		panic!("Unaligned full size");
+	}
+	// pack hash and nonce together into first 40 bytes of s_mix
+	let mut s_mix: [Node; MIX_NODES + 1] = [ Node::default(), Node::default(), Node::default() ];
+	unsafe { ptr::copy_nonoverlapping(header_hash.as_ptr(), s_mix.get_unchecked_mut(0).bytes.as_mut_ptr(), 32) };
+	unsafe { ptr::copy_nonoverlapping(mem::transmute(&nonce), s_mix.get_unchecked_mut(0).bytes[32..].as_mut_ptr(), 8) };
+
+	// compute sha3-512 hash and replicate across mix
+	unsafe {
+		let mut sha3 = Keccak::new_keccak512();
+		sha3.update(&s_mix.get_unchecked(0).bytes[0..40]);
+		sha3.finalize(&mut s_mix.get_unchecked_mut(0).bytes);
+
+		let (f_mix, mut mix) = s_mix.split_at_mut(1);
+		for w in 0..MIX_WORDS {
+			*mix.get_unchecked_mut(0).as_words_mut().get_unchecked_mut(w) = *f_mix.get_unchecked(0).as_words().get_unchecked(w % NODE_WORDS);
+		}
+
+		let page_size = 4 * MIX_WORDS;
+		let num_full_pages = (full_size / page_size) as u32;
+
+		for i in 0..(ETHASH_ACCESSES as u32) {
+			let index = fnv_hash(f_mix.get_unchecked(0).as_words().get_unchecked(0) ^ i, *mix.get_unchecked(0).as_words().get_unchecked((i as usize) % MIX_WORDS)) % num_full_pages;
+			for n in 0..MIX_NODES {
+				let tmp_node = calculate_dag_item(index * MIX_NODES as u32 + n as u32, light);
+				for w in 0..NODE_WORDS {
+					*mix.get_unchecked_mut(n).as_words_mut().get_unchecked_mut(w) = fnv_hash(*mix.get_unchecked(n).as_words().get_unchecked(w), *tmp_node.as_words().get_unchecked(w));
+				}
+			}
+		}
+
+		// compress mix
+		for i in 0..(MIX_WORDS / 4) {
+			let w = i * 4;
+			let mut reduction = *mix.get_unchecked(0).as_words().get_unchecked(w + 0);
+			reduction = reduction.wrapping_mul(FNV_PRIME) ^ *mix.get_unchecked(0).as_words().get_unchecked(w + 1);
+			reduction = reduction.wrapping_mul(FNV_PRIME) ^ *mix.get_unchecked(0).as_words().get_unchecked(w + 2);
+			reduction = reduction.wrapping_mul(FNV_PRIME) ^ *mix.get_unchecked(0).as_words().get_unchecked(w + 3);
+			*mix.get_unchecked_mut(0).as_words_mut().get_unchecked_mut(i) = reduction;
+		}
+
+		let mut mix_hash: H256 = [0u8; 32];
+		ptr::copy_nonoverlapping(mix.get_unchecked_mut(0).bytes.as_ptr(), mix_hash.as_mut_ptr(), 32);
+		let mut value: H256 = [0u8; 32];
+
+		let mut sha3 = Keccak::new_keccak256();
+		sha3.update(&f_mix.get_unchecked(0).bytes);
+		sha3.update(&mix_hash);
+		sha3.finalize(&mut value);
+
+		ProofOfWork {
+			mix_hash: mix_hash,
+			value: value,
+		}
+	}
+}
+
+fn calculate_dag_item(node_index: u32, light: &Light) -> Node {
+	unsafe {
+		let num_parent_nodes = light.cache.len();
+		let cache_nodes = &light.cache;
+		let init = cache_nodes.get_unchecked(node_index as usize % num_parent_nodes);
+		let mut ret = init.clone();
+		*ret.as_words_mut().get_unchecked_mut(0) ^= node_index;
+
+		let mut sha3 = Keccak::new_keccak512();
+		sha3.update(&ret.bytes);
+		sha3.finalize(&mut ret.bytes);
+
+		for i in 0..ETHASH_DATASET_PARENTS {
+			let parent_index = fnv_hash(node_index ^ i, *ret.as_words().get_unchecked(i as usize % NODE_WORDS)) % num_parent_nodes as u32;
+			let parent = cache_nodes.get_unchecked(parent_index as usize);
+			for w in 0..NODE_WORDS {
+				*ret.as_words_mut().get_unchecked_mut(w) = fnv_hash(*ret.as_words().get_unchecked(w), *parent.as_words().get_unchecked(w));
+			}
+		}
+
+		let mut sha3 = Keccak::new_keccak512();
+		sha3.update(&ret.bytes);
+		sha3.finalize(&mut ret.bytes);
+		ret
+	}
+}
+
+fn light_new(block_number: u64) -> Light {
+	let seedhash = get_seedhash(block_number);
+	let cache_size = get_cache_size(block_number);
+
+	if cache_size % NODE_BYTES != 0 {
+		panic!("Unaligned cache size");
+	}
+	let num_nodes = cache_size / NODE_BYTES;
+
+	let mut nodes = Vec::with_capacity(num_nodes);
+	nodes.resize(num_nodes, Node::default());
+	unsafe {
+		sha3_512(&seedhash[0..32], &mut nodes.get_unchecked_mut(0).bytes);
+		for i in 1..num_nodes {
+			let mut sha3 = Keccak::new_keccak512();
+			sha3.update(&nodes.get_unchecked_mut(i - 1).bytes);
+			sha3.finalize(&mut nodes.get_unchecked_mut(i).bytes);
+		}
+		
+		for _ in 0..ETHASH_CACHE_ROUNDS {
+			for i in 0..num_nodes {
+				let idx = *nodes.get_unchecked_mut(i).as_words().get_unchecked(0) as usize % num_nodes;
+				let mut data = nodes.get_unchecked((num_nodes - 1 + i) % num_nodes).clone();
+				for w in 0..NODE_WORDS {
+					*data.as_words_mut().get_unchecked_mut(w) ^= *nodes.get_unchecked(idx).as_words().get_unchecked(w) ;
+				}
+				sha3_512(&data.bytes, &mut nodes.get_unchecked_mut(i).bytes);
+			}
+		}
+	}
+
+	Light {
+		cache: nodes,
+		block_number: block_number,
+	}
+}
+
+#[test]
+fn test_difficulty_test() {
+	let hash = [0xf5, 0x7e, 0x6f, 0x3a, 0xcf, 0xc0, 0xdd, 0x4b, 0x5b, 0xf2, 0xbe, 0xe4, 0x0a, 0xb3, 0x35, 0x8a, 0xa6, 0x87, 0x73, 0xa8, 0xd0, 0x9f, 0x5e, 0x59, 0x5e, 0xab, 0x55, 0x94, 0x05,  0x52, 0x7d, 0x72];
+	let mix_hash = [0x1f, 0xff, 0x04, 0xce, 0xc9, 0x41, 0x73, 0xfd, 0x59, 0x1e, 0x3d, 0x89, 0x60, 0xce, 0x6b, 0xdf, 0x8b, 0x19, 0x71, 0x04, 0x8c, 0x71, 0xff, 0x93, 0x7b, 0xb2, 0xd3, 0x2a, 0x64, 0x31, 0xab, 0x6d ]; 
+	let nonce = 0xd7b3ac70a301a249;
+	let boundary_good = [0x00, 0x00, 0x00, 0x00, 0x00, 0x01, 0x3e, 0x9b, 0x6c, 0x69, 0xbc, 0x2c, 0xe2, 0xa2, 0x4a, 0x8e, 0x95, 0x69, 0xef, 0xc7, 0xd7, 0x1b, 0x33, 0x35, 0xdf, 0x36, 0x8c, 0x9a, 0xe9, 0x7e, 0x53, 0x84];
+	assert!(quick_check_difficulty(&hash, nonce, &mix_hash, &boundary_good));
+	let boundary_bad = [0x00, 0x00, 0x00, 0x00, 0x00, 0x01, 0x3a, 0x9b, 0x6c, 0x69, 0xbc, 0x2c, 0xe2, 0xa2, 0x4a, 0x8e, 0x95, 0x69, 0xef, 0xc7, 0xd7, 0x1b, 0x33, 0x35, 0xdf, 0x36, 0x8c, 0x9a, 0xe9, 0x7e, 0x53, 0x84];
+	assert!(!quick_check_difficulty(&hash, nonce, &mix_hash, &boundary_bad));
+}
+
+#[test]
+fn test_light_compute() {
+	let hash = [0xf5, 0x7e, 0x6f, 0x3a, 0xcf, 0xc0, 0xdd, 0x4b, 0x5b, 0xf2, 0xbe, 0xe4, 0x0a, 0xb3, 0x35, 0x8a, 0xa6, 0x87, 0x73, 0xa8, 0xd0, 0x9f, 0x5e, 0x59, 0x5e, 0xab, 0x55, 0x94, 0x05,  0x52, 0x7d, 0x72];
+	let mix_hash = [0x1f, 0xff, 0x04, 0xce, 0xc9, 0x41, 0x73, 0xfd, 0x59, 0x1e, 0x3d, 0x89, 0x60, 0xce, 0x6b, 0xdf, 0x8b, 0x19, 0x71, 0x04, 0x8c, 0x71, 0xff, 0x93, 0x7b, 0xb2, 0xd3, 0x2a, 0x64, 0x31, 0xab, 0x6d ]; 
+	let boundary = [0x00, 0x00, 0x00, 0x00, 0x00, 0x01, 0x3e, 0x9b, 0x6c, 0x69, 0xbc, 0x2c, 0xe2, 0xa2, 0x4a, 0x8e, 0x95, 0x69, 0xef, 0xc7, 0xd7, 0x1b, 0x33, 0x35, 0xdf, 0x36, 0x8c, 0x9a, 0xe9, 0x7e, 0x53, 0x84];
+	let nonce = 0xd7b3ac70a301a249;
+	// difficulty = 0x085657254bd9u64;
+	let light = Light::new(486382);
+	let result = light_compute(&light, &hash, nonce);
+	assert_eq!(result.mix_hash[..], mix_hash[..]);
+	assert_eq!(result.value[..], boundary[..]);
+}

ethash/src/lib.rs

@@ -0,0 +1,42 @@
+//! Ethash implementation
+//! See https://github.com/ethereum/wiki/wiki/Ethash
+extern crate tiny_keccak;
+mod sizes;
+mod compute;
+
+use compute::Light;
+pub use compute::{quick_get_difficulty, H256, ProofOfWork, ETHASH_EPOCH_LENGTH};
+
+use std::collections::HashMap;
+use std::sync::RwLock;
+
+/// Lighy/Full cache manager
+pub struct EthashManager {
+	lights: RwLock<HashMap<u64, Light>>,
+}
+
+impl EthashManager {
+	/// Create a new new instance of ethash manager
+	pub fn new() -> EthashManager {
+		EthashManager { 
+			lights: RwLock::new(HashMap::new())
+		}
+	}
+
+	/// Calculate the light client data
+	/// `block_number` - Block number to check
+	/// `light` - The light client handler
+	/// `header_hash` - The header hash to pack into the mix
+	/// `nonce` - The nonce to pack into the mix
+	pub fn compute_light(&self, block_number: u64, header_hash: &H256, nonce: u64) -> ProofOfWork {
+		let epoch = block_number / ETHASH_EPOCH_LENGTH;
+		if !self.lights.read().unwrap().contains_key(&epoch) {
+			let mut lights = self.lights.write().unwrap(); // obtain write lock
+			if !lights.contains_key(&epoch) {
+				let light = Light::new(block_number);
+				lights.insert(epoch, light);
+			}
+		}
+		self.lights.read().unwrap().get(&epoch).unwrap().compute(header_hash, nonce)
+	}
+}

ethash/src/sizes.rs

@@ -0,0 +1,772 @@
+// 2048 Epochs (~20 years) worth of tabulated DAG sizes
+
+// Generated with the following Mathematica Code:
+
+// GetCacheSizes[n_] := Module[{
+//        CacheSizeBytesInit = 2^24,
+//        CacheGrowth = 2^17,
+//        HashBytes = 64,
+//        j = 0},
+//       Reap[
+//         While[j < n,
+//           Module[{i =
+//             Floor[(CacheSizeBytesInit + CacheGrowth * j) / HashBytes]},
+//             While[! PrimeQ[i], i--];
+//             Sow[i*HashBytes]; j++]]]][[2]][[1]]
+pub const DAG_SIZES: [u64; 2048] = [
+	1073739904u64, 1082130304u64, 1090514816u64, 1098906752u64, 1107293056u64,
+	1115684224u64, 1124070016u64, 1132461952u64, 1140849536u64, 1149232768u64,
+	1157627776u64, 1166013824u64, 1174404736u64, 1182786944u64, 1191180416u64,
+	1199568512u64, 1207958912u64, 1216345216u64, 1224732032u64, 1233124736u64,
+	1241513344u64, 1249902464u64, 1258290304u64, 1266673792u64, 1275067264u64,
+	1283453312u64, 1291844992u64, 1300234112u64, 1308619904u64, 1317010048u64,
+	1325397376u64, 1333787776u64, 1342176128u64, 1350561664u64, 1358954368u64,
+	1367339392u64, 1375731584u64, 1384118144u64, 1392507008u64, 1400897408u64,
+	1409284736u64, 1417673344u64, 1426062464u64, 1434451072u64, 1442839168u64,
+	1451229056u64, 1459615616u64, 1468006016u64, 1476394112u64, 1484782976u64,
+	1493171584u64, 1501559168u64, 1509948032u64, 1518337664u64, 1526726528u64,
+	1535114624u64, 1543503488u64, 1551892096u64, 1560278656u64, 1568669056u64,
+	1577056384u64, 1585446272u64, 1593831296u64, 1602219392u64, 1610610304u64,
+	1619000192u64, 1627386752u64, 1635773824u64, 1644164224u64, 1652555648u64,
+	1660943488u64, 1669332608u64, 1677721216u64, 1686109312u64, 1694497664u64,
+	1702886272u64, 1711274624u64, 1719661184u64, 1728047744u64, 1736434816u64,
+	1744829056u64, 1753218944u64, 1761606272u64, 1769995904u64, 1778382464u64,
+	1786772864u64, 1795157888u64, 1803550592u64, 1811937664u64, 1820327552u64,
+	1828711552u64, 1837102976u64, 1845488768u64, 1853879936u64, 1862269312u64,
+	1870656896u64, 1879048064u64, 1887431552u64, 1895825024u64, 1904212096u64,
+	1912601216u64, 1920988544u64, 1929379456u64, 1937765504u64, 1946156672u64,
+	1954543232u64, 1962932096u64, 1971321728u64, 1979707264u64, 1988093056u64,
+	1996487552u64, 2004874624u64, 2013262208u64, 2021653888u64, 2030039936u64,
+	2038430848u64, 2046819968u64, 2055208576u64, 2063596672u64, 2071981952u64,
+	2080373632u64, 2088762752u64, 2097149056u64, 2105539712u64, 2113928576u64,
+	2122315136u64, 2130700672u64, 2139092608u64, 2147483264u64, 2155872128u64,
+	2164257664u64, 2172642176u64, 2181035392u64, 2189426048u64, 2197814912u64,
+	2206203008u64, 2214587264u64, 2222979712u64, 2231367808u64, 2239758208u64,
+	2248145024u64, 2256527744u64, 2264922752u64, 2273312128u64, 2281701248u64,
+	2290086272u64, 2298476672u64, 2306867072u64, 2315251072u64, 2323639168u64,
+	2332032128u64, 2340420224u64, 2348808064u64, 2357196416u64, 2365580416u64,
+	2373966976u64, 2382363008u64, 2390748544u64, 2399139968u64, 2407530368u64,
+	2415918976u64, 2424307328u64, 2432695424u64, 2441084288u64, 2449472384u64,
+	2457861248u64, 2466247808u64, 2474637184u64, 2483026816u64, 2491414144u64,
+	2499803776u64, 2508191872u64, 2516582272u64, 2524970368u64, 2533359232u64,
+	2541743488u64, 2550134144u64, 2558525056u64, 2566913408u64, 2575301504u64,
+	2583686528u64, 2592073856u64, 2600467328u64, 2608856192u64, 2617240448u64,
+	2625631616u64, 2634022016u64, 2642407552u64, 2650796416u64, 2659188352u64,
+	2667574912u64, 2675965312u64, 2684352896u64, 2692738688u64, 2701130624u64,
+	2709518464u64, 2717907328u64, 2726293376u64, 2734685056u64, 2743073152u64,
+	2751462016u64, 2759851648u64, 2768232832u64, 2776625536u64, 2785017728u64,
+	2793401984u64, 2801794432u64, 2810182016u64, 2818571648u64, 2826959488u64,
+	2835349376u64, 2843734144u64, 2852121472u64, 2860514432u64, 2868900992u64,
+	2877286784u64, 2885676928u64, 2894069632u64, 2902451584u64, 2910843008u64,
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+	11223957376u64, 11232345728u64, 11240734592u64, 11249122688u64, 11257511296u64,
+	11265899648u64, 11274285952u64, 11282675584u64, 11291065472u64, 11299452544u64,
+	11307842432u64, 11316231296u64, 11324616832u64, 11333009024u64, 11341395584u64,
+	11349782656u64, 11358172288u64, 11366560384u64, 11374950016u64, 11383339648u64,
+	11391721856u64, 11400117376u64, 11408504192u64, 11416893568u64, 11425283456u64,
+	11433671552u64, 11442061184u64, 11450444672u64, 11458837888u64, 11467226752u64,
+	11475611776u64, 11484003968u64, 11492392064u64, 11500780672u64, 11509169024u64,
+	11517550976u64, 11525944448u64, 11534335616u64, 11542724224u64, 11551111808u64,
+	11559500672u64, 11567890304u64, 11576277376u64, 11584667008u64, 11593056128u64,
+	11601443456u64, 11609830016u64, 11618221952u64, 11626607488u64, 11634995072u64,
+	11643387776u64, 11651775104u64, 11660161664u64, 11668552576u64, 11676940928u64,
+	11685330304u64, 11693718656u64, 11702106496u64, 11710496128u64, 11718882688u64,
+	11727273088u64, 11735660416u64, 11744050048u64, 11752437376u64, 11760824704u64,
+	11769216128u64, 11777604736u64, 11785991296u64, 11794381952u64, 11802770048u64,
+	11811157888u64, 11819548544u64, 11827932544u64, 11836324736u64, 11844713344u64,
+	11853100928u64, 11861486464u64, 11869879936u64, 11878268032u64, 11886656896u64,
+	11895044992u64, 11903433088u64, 11911822976u64, 11920210816u64, 11928600448u64,
+	11936987264u64, 11945375872u64, 11953761152u64, 11962151296u64, 11970543488u64,
+	11978928512u64, 11987320448u64, 11995708288u64, 12004095104u64, 12012486272u64,
+	12020875136u64, 12029255552u64, 12037652096u64, 12046039168u64, 12054429568u64,
+	12062813824u64, 12071206528u64, 12079594624u64, 12087983744u64, 12096371072u64,
+	12104759936u64, 12113147264u64, 12121534592u64, 12129924992u64, 12138314624u64,
+	12146703232u64, 12155091584u64, 12163481216u64, 12171864704u64, 12180255872u64,
+	12188643968u64, 12197034112u64, 12205424512u64, 12213811328u64, 12222199424u64,
+	12230590336u64, 12238977664u64, 12247365248u64, 12255755392u64, 12264143488u64,
+	12272531584u64, 12280920448u64, 12289309568u64, 12297694592u64, 12306086528u64,
+	12314475392u64, 12322865024u64, 12331253632u64, 12339640448u64, 12348029312u64,
+	12356418944u64, 12364805248u64, 12373196672u64, 12381580928u64, 12389969024u64,
+	12398357632u64, 12406750592u64, 12415138432u64, 12423527552u64, 12431916416u64,
+	12440304512u64, 12448692352u64, 12457081216u64, 12465467776u64, 12473859968u64,
+	12482245504u64, 12490636672u64, 12499025536u64, 12507411584u64, 12515801728u64,
+	12524190592u64, 12532577152u64, 12540966272u64, 12549354368u64, 12557743232u64,
+	12566129536u64, 12574523264u64, 12582911872u64, 12591299456u64, 12599688064u64,
+	12608074624u64, 12616463488u64, 12624845696u64, 12633239936u64, 12641631616u64,
+	12650019968u64, 12658407296u64, 12666795136u64, 12675183232u64, 12683574656u64,
+	12691960192u64, 12700350592u64, 12708740224u64, 12717128576u64, 12725515904u64,
+	12733906816u64, 12742295168u64, 12750680192u64, 12759071872u64, 12767460736u64,
+	12775848832u64, 12784236928u64, 12792626816u64, 12801014656u64, 12809404288u64,
+	12817789312u64, 12826181504u64, 12834568832u64, 12842954624u64, 12851345792u64,
+	12859732352u64, 12868122496u64, 12876512128u64, 12884901248u64, 12893289088u64,
+	12901672832u64, 12910067584u64, 12918455168u64, 12926842496u64, 12935232896u64,
+	12943620736u64, 12952009856u64, 12960396928u64, 12968786816u64, 12977176192u64,
+	12985563776u64, 12993951104u64, 13002341504u64, 13010730368u64, 13019115392u64,
+	13027506304u64, 13035895168u64, 13044272512u64, 13052673152u64, 13061062528u64,
+	13069446272u64, 13077838976u64, 13086227072u64, 13094613632u64, 13103000192u64,
+	13111393664u64, 13119782528u64, 13128157568u64, 13136559232u64, 13144945024u64,
+	13153329536u64, 13161724288u64, 13170111872u64, 13178502784u64, 13186884736u64,
+	13195279744u64, 13203667072u64, 13212057472u64, 13220445824u64, 13228832128u64,
+	13237221248u64, 13245610624u64, 13254000512u64, 13262388352u64, 13270777472u64,
+	13279166336u64, 13287553408u64, 13295943296u64, 13304331904u64, 13312719488u64,
+	13321108096u64, 13329494656u64, 13337885824u64, 13346274944u64, 13354663808u64,
+	13363051136u64, 13371439232u64, 13379825024u64, 13388210816u64, 13396605056u64,
+	13404995456u64, 13413380224u64, 13421771392u64, 13430159744u64, 13438546048u64,
+	13446937216u64, 13455326848u64, 13463708288u64, 13472103808u64, 13480492672u64,
+	13488875648u64, 13497269888u64, 13505657728u64, 13514045312u64, 13522435712u64,
+	13530824576u64, 13539210112u64, 13547599232u64, 13555989376u64, 13564379008u64,
+	13572766336u64, 13581154432u64, 13589544832u64, 13597932928u64, 13606320512u64,
+	13614710656u64, 13623097472u64, 13631477632u64, 13639874944u64, 13648264064u64,
+	13656652928u64, 13665041792u64, 13673430656u64, 13681818496u64, 13690207616u64,
+	13698595712u64, 13706982272u64, 13715373184u64, 13723762048u64, 13732150144u64,
+	13740536704u64, 13748926592u64, 13757316224u64, 13765700992u64, 13774090112u64,
+	13782477952u64, 13790869376u64, 13799259008u64, 13807647872u64, 13816036736u64,
+	13824425344u64, 13832814208u64, 13841202304u64, 13849591424u64, 13857978752u64,
+	13866368896u64, 13874754688u64, 13883145344u64, 13891533184u64, 13899919232u64,
+	13908311168u64, 13916692096u64, 13925085056u64, 13933473152u64, 13941866368u64,
+	13950253696u64, 13958643584u64, 13967032192u64, 13975417216u64, 13983807616u64,
+	13992197504u64, 14000582272u64, 14008973696u64, 14017363072u64, 14025752192u64,
+	14034137984u64, 14042528384u64, 14050918016u64, 14059301504u64, 14067691648u64,
+	14076083584u64, 14084470144u64, 14092852352u64, 14101249664u64, 14109635968u64,
+	14118024832u64, 14126407552u64, 14134804352u64, 14143188608u64, 14151577984u64,
+	14159968384u64, 14168357248u64, 14176741504u64, 14185127296u64, 14193521024u64,
+	14201911424u64, 14210301824u64, 14218685056u64, 14227067264u64, 14235467392u64,
+	14243855488u64, 14252243072u64, 14260630144u64, 14269021568u64, 14277409408u64,
+	14285799296u64, 14294187904u64, 14302571392u64, 14310961792u64, 14319353728u64,
+	14327738752u64, 14336130944u64, 14344518784u64, 14352906368u64, 14361296512u64,
+	14369685376u64, 14378071424u64, 14386462592u64, 14394848128u64, 14403230848u64,
+	14411627392u64, 14420013952u64, 14428402304u64, 14436793472u64, 14445181568u64,
+	14453569664u64, 14461959808u64, 14470347904u64, 14478737024u64, 14487122816u64,
+	14495511424u64, 14503901824u64, 14512291712u64, 14520677504u64, 14529064832u64,
+	14537456768u64, 14545845632u64, 14554234496u64, 14562618496u64, 14571011456u64,
+	14579398784u64, 14587789184u64, 14596172672u64, 14604564608u64, 14612953984u64,
+	14621341312u64, 14629724288u64, 14638120832u64, 14646503296u64, 14654897536u64,
+	14663284864u64, 14671675264u64, 14680061056u64, 14688447616u64, 14696835968u64,
+	14705228416u64, 14713616768u64, 14722003328u64, 14730392192u64, 14738784128u64,
+	14747172736u64, 14755561088u64, 14763947648u64, 14772336512u64, 14780725376u64,
+	14789110144u64, 14797499776u64, 14805892736u64, 14814276992u64, 14822670208u64,
+	14831056256u64, 14839444352u64, 14847836032u64, 14856222848u64, 14864612992u64,
+	14872997504u64, 14881388672u64, 14889775744u64, 14898165376u64, 14906553472u64,
+	14914944896u64, 14923329664u64, 14931721856u64, 14940109696u64, 14948497024u64,
+	14956887424u64, 14965276544u64, 14973663616u64, 14982053248u64, 14990439808u64,
+	14998830976u64, 15007216768u64, 15015605888u64, 15023995264u64, 15032385152u64,
+	15040768384u64, 15049154944u64, 15057549184u64, 15065939072u64, 15074328448u64,
+	15082715008u64, 15091104128u64, 15099493504u64, 15107879296u64, 15116269184u64,
+	15124659584u64, 15133042304u64, 15141431936u64, 15149824384u64, 15158214272u64,
+	15166602368u64, 15174991232u64, 15183378304u64, 15191760512u64, 15200154496u64,
+	15208542592u64, 15216931712u64, 15225323392u64, 15233708416u64, 15242098048u64,
+	15250489216u64, 15258875264u64, 15267265408u64, 15275654528u64, 15284043136u64,
+	15292431488u64, 15300819584u64, 15309208192u64, 15317596544u64, 15325986176u64,
+	15334374784u64, 15342763648u64, 15351151744u64, 15359540608u64, 15367929728u64,
+	15376318336u64, 15384706432u64, 15393092992u64, 15401481856u64, 15409869952u64,
+	15418258816u64, 15426649984u64, 15435037568u64, 15443425664u64, 15451815296u64,
+	15460203392u64, 15468589184u64, 15476979328u64, 15485369216u64, 15493755776u64,
+	15502146944u64, 15510534272u64, 15518924416u64, 15527311232u64, 15535699072u64,
+	15544089472u64, 15552478336u64, 15560866688u64, 15569254528u64, 15577642624u64,
+	15586031488u64, 15594419072u64, 15602809472u64, 15611199104u64, 15619586432u64,
+	15627975296u64, 15636364928u64, 15644753792u64, 15653141888u64, 15661529216u64,
+	15669918848u64, 15678305152u64, 15686696576u64, 15695083136u64, 15703474048u64,
+	15711861632u64, 15720251264u64, 15728636288u64, 15737027456u64, 15745417088u64,
+	15753804928u64, 15762194048u64, 15770582656u64, 15778971008u64, 15787358336u64,
+	15795747712u64, 15804132224u64, 15812523392u64, 15820909696u64, 15829300096u64,
+	15837691264u64, 15846071936u64, 15854466944u64, 15862855808u64, 15871244672u64,
+	15879634816u64, 15888020608u64, 15896409728u64, 15904799104u64, 15913185152u64,
+	15921577088u64, 15929966464u64, 15938354816u64, 15946743424u64, 15955129472u64,
+	15963519872u64, 15971907968u64, 15980296064u64, 15988684928u64, 15997073024u64,
+	16005460864u64, 16013851264u64, 16022241152u64, 16030629248u64, 16039012736u64,
+	16047406976u64, 16055794816u64, 16064181376u64, 16072571264u64, 16080957824u64,
+	16089346688u64, 16097737856u64, 16106125184u64, 16114514816u64, 16122904192u64,
+	16131292544u64, 16139678848u64, 16148066944u64, 16156453504u64, 16164839552u64,
+	16173236096u64, 16181623424u64, 16190012032u64, 16198401152u64, 16206790528u64,
+	16215177344u64, 16223567744u64, 16231956352u64, 16240344704u64, 16248731008u64,
+	16257117824u64, 16265504384u64, 16273898624u64, 16282281856u64, 16290668672u64,
+	16299064192u64, 16307449216u64, 16315842176u64, 16324230016u64, 16332613504u64,
+	16341006464u64, 16349394304u64, 16357783168u64, 16366172288u64, 16374561664u64,
+	16382951296u64, 16391337856u64, 16399726208u64, 16408116352u64, 16416505472u64,
+	16424892032u64, 16433282176u64, 16441668224u64, 16450058624u64, 16458448768u64,
+	16466836864u64, 16475224448u64, 16483613056u64, 16492001408u64, 16500391808u64,
+	16508779648u64, 16517166976u64, 16525555328u64, 16533944192u64, 16542330752u64,
+	16550719616u64, 16559110528u64, 16567497088u64, 16575888512u64, 16584274816u64,
+	16592665472u64, 16601051008u64, 16609442944u64, 16617832064u64, 16626218624u64,
+	16634607488u64, 16642996096u64, 16651385728u64, 16659773824u64, 16668163712u64,
+	16676552576u64, 16684938112u64, 16693328768u64, 16701718144u64, 16710095488u64,
+	16718492288u64, 16726883968u64, 16735272832u64, 16743661184u64, 16752049792u64,
+	16760436608u64, 16768827008u64, 16777214336u64, 16785599104u64, 16793992832u64,
+	16802381696u64, 16810768768u64, 16819151744u64, 16827542656u64, 16835934848u64,
+	16844323712u64, 16852711552u64, 16861101952u64, 16869489536u64, 16877876864u64,
+	16886265728u64, 16894653056u64, 16903044736u64, 16911431296u64, 16919821696u64,
+	16928207488u64, 16936592768u64, 16944987776u64, 16953375616u64, 16961763968u64,
+	16970152832u64, 16978540928u64, 16986929536u64, 16995319168u64, 17003704448u64,
+	17012096896u64, 17020481152u64, 17028870784u64, 17037262208u64, 17045649536u64,
+	17054039936u64, 17062426496u64, 17070814336u64, 17079205504u64, 17087592064u64,
+	17095978112u64, 17104369024u64, 17112759424u64, 17121147776u64, 17129536384u64,
+	17137926016u64, 17146314368u64, 17154700928u64, 17163089792u64, 17171480192u64,
+	17179864192u64, 17188256896u64, 17196644992u64, 17205033856u64, 17213423488u64,
+	17221811072u64, 17230198912u64, 17238588032u64, 17246976896u64, 17255360384u64,
+	17263754624u64, 17272143232u64, 17280530048u64, 17288918912u64, 17297309312u64,
+	17305696384u64, 17314085504u64, 17322475136u64, 17330863744u64, 17339252096u64,
+	17347640192u64, 17356026496u64, 17364413824u64, 17372796544u64, 17381190016u64,
+	17389583488u64, 17397972608u64, 17406360704u64, 17414748544u64, 17423135872u64,
+	17431527296u64, 17439915904u64, 17448303232u64, 17456691584u64, 17465081728u64,
+	17473468288u64, 17481857408u64, 17490247552u64, 17498635904u64, 17507022464u64,
+	17515409024u64, 17523801728u64, 17532189824u64, 17540577664u64, 17548966016u64,
+	17557353344u64, 17565741184u64, 17574131584u64, 17582519168u64, 17590907008u64,
+	17599296128u64, 17607687808u64, 17616076672u64, 17624455808u64, 17632852352u64,
+	17641238656u64, 17649630848u64, 17658018944u64, 17666403968u64, 17674794112u64,
+	17683178368u64, 17691573376u64, 17699962496u64, 17708350592u64, 17716739968u64,
+	17725126528u64, 17733517184u64, 17741898112u64, 17750293888u64, 17758673024u64,
+	17767070336u64, 17775458432u64, 17783848832u64, 17792236928u64, 17800625536u64,
+	17809012352u64, 17817402752u64, 17825785984u64, 17834178944u64, 17842563968u64,
+	17850955648u64, 17859344512u64, 17867732864u64, 17876119424u64, 17884511872u64,
+	17892900224u64, 17901287296u64, 17909677696u64, 17918058112u64, 17926451072u64,
+	17934843776u64, 17943230848u64, 17951609216u64, 17960008576u64, 17968397696u64,
+	17976784256u64, 17985175424u64, 17993564032u64, 18001952128u64, 18010339712u64,
+	18018728576u64, 18027116672u64, 18035503232u64, 18043894144u64, 18052283264u64,
+	18060672128u64, 18069056384u64, 18077449856u64, 18085837184u64, 18094225792u64,
+	18102613376u64, 18111004544u64, 18119388544u64, 18127781248u64, 18136170368u64,
+	18144558976u64, 18152947328u64, 18161336192u64, 18169724288u64, 18178108544u64,
+	18186498944u64, 18194886784u64, 18203275648u64, 18211666048u64, 18220048768u64,
+	18228444544u64, 18236833408u64, 18245220736u64
+];
+
+// Generated with the following Mathematica Code:
+
+// GetCacheSizes[n_] := Module[{
+//         DataSetSizeBytesInit = 2^30,
+//         MixBytes = 128,
+//         DataSetGrowth = 2^23,
+//         HashBytes = 64,
+//         CacheMultiplier = 1024,
+//         j = 0},
+//     Reap[
+//       While[j < n,
+//        Module[{i = Floor[(DataSetSizeBytesInit + DataSetGrowth * j) / (CacheMultiplier * HashBytes)]},
+//         While[! PrimeQ[i], i--];
+//         Sow[i*HashBytes]; j++]]]][[2]][[1]]
+pub const CACHE_SIZES: [u64; 2048] = [
+	16776896u64, 16907456u64, 17039296u64, 17170112u64, 17301056u64, 17432512u64, 17563072u64,
+	17693888u64, 17824192u64, 17955904u64, 18087488u64, 18218176u64, 18349504u64, 18481088u64,
+	18611392u64, 18742336u64, 18874304u64, 19004224u64, 19135936u64, 19267264u64, 19398208u64,
+	19529408u64, 19660096u64, 19791424u64, 19922752u64, 20053952u64, 20184896u64, 20315968u64,
+	20446912u64, 20576576u64, 20709184u64, 20840384u64, 20971072u64, 21102272u64, 21233216u64,
+	21364544u64, 21494848u64, 21626816u64, 21757376u64, 21887552u64, 22019392u64, 22151104u64,
+	22281536u64, 22412224u64, 22543936u64, 22675264u64, 22806464u64, 22935872u64, 23068096u64,
+	23198272u64, 23330752u64, 23459008u64, 23592512u64, 23723968u64, 23854912u64, 23986112u64,
+	24116672u64, 24247616u64, 24378688u64, 24509504u64, 24640832u64, 24772544u64, 24903488u64,
+	25034432u64, 25165376u64, 25296704u64, 25427392u64, 25558592u64, 25690048u64, 25820096u64,
+	25951936u64, 26081728u64, 26214208u64, 26345024u64, 26476096u64, 26606656u64, 26737472u64,
+	26869184u64, 26998208u64, 27131584u64, 27262528u64, 27393728u64, 27523904u64, 27655744u64,
+	27786688u64, 27917888u64, 28049344u64, 28179904u64, 28311488u64, 28441792u64, 28573504u64,
+	28700864u64, 28835648u64, 28966208u64, 29096768u64, 29228608u64, 29359808u64, 29490752u64,
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+	200801984u64, 200933312u64, 201062464u64, 201194944u64, 201326144u64, 201457472u64,
+	201588544u64, 201719744u64, 201850816u64, 201981632u64, 202111552u64, 202244032u64,
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+	203159872u64, 203292608u64, 203423296u64, 203553472u64, 203685824u64, 203816896u64,
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+	204733888u64, 204864448u64, 204996544u64, 205125568u64, 205258304u64, 205388864u64,
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+	207879104u64, 208010048u64, 208141888u64, 208273216u64, 208404032u64, 208534336u64,
+	208666048u64, 208796864u64, 208927424u64, 209059264u64, 209189824u64, 209321792u64,
+	209451584u64, 209582656u64, 209715136u64, 209845568u64, 209976896u64, 210106432u64,
+	210239296u64, 210370112u64, 210501568u64, 210630976u64, 210763712u64, 210894272u64,
+	211024832u64, 211156672u64, 211287616u64, 211418176u64, 211549376u64, 211679296u64,
+	211812032u64, 211942592u64, 212074432u64, 212204864u64, 212334016u64, 212467648u64,
+	212597824u64, 212727616u64, 212860352u64, 212991424u64, 213120832u64, 213253952u64,
+	213385024u64, 213515584u64, 213645632u64, 213777728u64, 213909184u64, 214040128u64,
+	214170688u64, 214302656u64, 214433728u64, 214564544u64, 214695232u64, 214826048u64,
+	214956992u64, 215089088u64, 215219776u64, 215350592u64, 215482304u64, 215613248u64,
+	215743552u64, 215874752u64, 216005312u64, 216137024u64, 216267328u64, 216399296u64,
+	216530752u64, 216661696u64, 216790592u64, 216923968u64, 217054528u64, 217183168u64,
+	217316672u64, 217448128u64, 217579072u64, 217709504u64, 217838912u64, 217972672u64,
+	218102848u64, 218233024u64, 218364736u64, 218496832u64, 218627776u64, 218759104u64,
+	218888896u64, 219021248u64, 219151936u64, 219281728u64, 219413056u64, 219545024u64,
+	219675968u64, 219807296u64, 219938624u64, 220069312u64, 220200128u64, 220331456u64,
+	220461632u64, 220592704u64, 220725184u64, 220855744u64, 220987072u64, 221117888u64,
+	221249216u64, 221378368u64, 221510336u64, 221642048u64, 221772736u64, 221904832u64,
+	222031808u64, 222166976u64, 222297536u64, 222428992u64, 222559936u64, 222690368u64,
+	222820672u64, 222953152u64, 223083968u64, 223213376u64, 223345984u64, 223476928u64,
+	223608512u64, 223738688u64, 223869376u64, 224001472u64, 224132672u64, 224262848u64,
+	224394944u64, 224524864u64, 224657344u64, 224788288u64, 224919488u64, 225050432u64,
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+	227539904u64, 227669696u64, 227802944u64, 227932352u64, 228065216u64, 228196288u64,
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+	229113152u64, 229243328u64, 229375936u64, 229505344u64, 229636928u64, 229769152u64,
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+	230684864u64, 230816704u64, 230948416u64, 231079616u64, 231210944u64, 231342016u64,
+	231472448u64, 231603776u64, 231733952u64, 231866176u64, 231996736u64, 232127296u64,
+	232259392u64, 232388672u64, 232521664u64, 232652608u64, 232782272u64, 232914496u64,
+	233043904u64, 233175616u64, 233306816u64, 233438528u64, 233569984u64, 233699776u64,
+	233830592u64, 233962688u64, 234092224u64, 234221888u64, 234353984u64, 234485312u64,
+	234618304u64, 234749888u64, 234880832u64, 235011776u64, 235142464u64, 235274048u64,
+	235403456u64, 235535936u64, 235667392u64, 235797568u64, 235928768u64, 236057152u64,
+	236190272u64, 236322752u64, 236453312u64, 236583616u64, 236715712u64, 236846528u64,
+	236976448u64, 237108544u64, 237239104u64, 237371072u64, 237501632u64, 237630784u64,
+	237764416u64, 237895232u64, 238026688u64, 238157632u64, 238286912u64, 238419392u64,
+	238548032u64, 238681024u64, 238812608u64, 238941632u64, 239075008u64, 239206336u64,
+	239335232u64, 239466944u64, 239599168u64, 239730496u64, 239861312u64, 239992384u64,
+	240122816u64, 240254656u64, 240385856u64, 240516928u64, 240647872u64, 240779072u64,
+	240909632u64, 241040704u64, 241171904u64, 241302848u64, 241433408u64, 241565248u64,
+	241696192u64, 241825984u64, 241958848u64, 242088256u64, 242220224u64, 242352064u64,
+	242481856u64, 242611648u64, 242744896u64, 242876224u64, 243005632u64, 243138496u64,
+	243268672u64, 243400384u64, 243531712u64, 243662656u64, 243793856u64, 243924544u64,
+	244054592u64, 244187072u64, 244316608u64, 244448704u64, 244580032u64, 244710976u64,
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+	269221312u64, 269352256u64, 269482688u64, 269614784u64, 269745856u64, 269876416u64,
+	270007616u64, 270139328u64, 270270272u64, 270401216u64, 270531904u64, 270663616u64,
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+	271580992u64, 271711936u64, 271843136u64, 271973056u64, 272105408u64, 272236352u64,
+	272367296u64, 272498368u64, 272629568u64, 272759488u64, 272891456u64, 273022784u64,
+	273153856u64, 273284672u64, 273415616u64, 273547072u64, 273677632u64, 273808448u64,
+	273937088u64, 274071488u64, 274200896u64, 274332992u64, 274463296u64, 274595392u64,
+	274726208u64, 274857536u64, 274988992u64, 275118656u64, 275250496u64, 275382208u64,
+	275513024u64, 275643968u64, 275775296u64, 275906368u64, 276037184u64, 276167872u64,
+	276297664u64, 276429376u64, 276560576u64, 276692672u64, 276822976u64, 276955072u64,
+	277085632u64, 277216832u64, 277347008u64, 277478848u64, 277609664u64, 277740992u64,
+	277868608u64, 278002624u64, 278134336u64, 278265536u64, 278395328u64, 278526784u64,
+	278657728u64, 278789824u64, 278921152u64, 279052096u64, 279182912u64, 279313088u64,
+	279443776u64, 279576256u64, 279706048u64, 279838528u64, 279969728u64, 280099648u64,
+	280230976u64, 280361408u64, 280493632u64, 280622528u64, 280755392u64, 280887104u64,
+	281018176u64, 281147968u64, 281278912u64, 281411392u64, 281542592u64, 281673152u64,
+	281803712u64, 281935552u64, 282066496u64, 282197312u64, 282329024u64, 282458816u64,
+	282590272u64, 282720832u64, 282853184u64, 282983744u64, 283115072u64, 283246144u64,
+	283377344u64, 283508416u64, 283639744u64, 283770304u64, 283901504u64, 284032576u64,
+	284163136u64, 284294848u64, 284426176u64, 284556992u64, 284687296u64, 284819264u64,
+	284950208u64, 285081536u64
+];
+

src/error.rs

@@ -62,6 +62,7 @@ pub enum BlockError {
 	InvalidReceiptsStateRoot(Mismatch<H256>),
 	InvalidTimestamp(OutOfBounds<u64>),
 	InvalidLogBloom(Mismatch<LogBloom>),
+	InvalidEthashDifficulty(Mismatch<U256>),
 	InvalidBlockNonce(Mismatch<H256>),
 	InvalidParentHash(Mismatch<H256>),
 	InvalidNumber(OutOfBounds<BlockNumber>),

src/ethereum/ethash.rs

@@ -1,3 +1,6 @@
+extern crate ethash;
+
+use self::ethash::{quick_get_difficulty, EthashManager, H256 as EH256};
 use common::*;
 use block::*;
 use spec::*;
@@ -9,6 +12,7 @@ use evm::Factory;
 /// mainnet chains in the Olympic, Frontier and Homestead eras.
 pub struct Ethash {
 	spec: Spec,
+	pow: EthashManager,
 	factory: Factory,
 	u64_params: RwLock<HashMap<String, u64>>,
 	u256_params: RwLock<HashMap<String, U256>>,
@@ -16,8 +20,9 @@ pub struct Ethash {
 
 impl Ethash {
 	pub fn new_boxed(spec: Spec) -> Box<Engine> {
-		Box::new(Ethash{
+		Box::new(Ethash {
 			spec: spec,
+			pow: EthashManager::new(),
 			// TODO [todr] should this return any specific factory?
 			factory: Factory::default(),
 			u64_params: RwLock::new(HashMap::new()),
@@ -97,13 +102,26 @@ impl Engine for Ethash {
 		if header.difficulty < min_difficulty {
 			return Err(From::from(BlockError::InvalidDifficulty(Mismatch { expected: min_difficulty, found: header.difficulty })))
 		}
-		// TODO: Verify seal (quick)
-
+		let difficulty = Ethash::boundary_to_difficulty(&Ethash::from_ethash(quick_get_difficulty(
+				&Ethash::to_ethash(header.bare_hash()), 
+				header.nonce(),
+				&Ethash::to_ethash(header.mix_hash()))));
+		if difficulty < header.difficulty {
+			return Err(From::from(BlockError::InvalidEthashDifficulty(Mismatch { expected: header.difficulty, found: difficulty })));
+		}
 		Ok(())
 	}
 
-	fn verify_block_unordered(&self, _header: &Header, _block: Option<&[u8]>) -> result::Result<(), Error> {
-		// TODO: Verify seal (full)
+	fn verify_block_unordered(&self, header: &Header, _block: Option<&[u8]>) -> result::Result<(), Error> {
+		let result = self.pow.compute_light(header.number as u64, &Ethash::to_ethash(header.bare_hash()), header.nonce());
+		let mix = Ethash::from_ethash(result.mix_hash);
+		let difficulty = Ethash::boundary_to_difficulty(&Ethash::from_ethash(result.value));
+		if mix != header.mix_hash() {
+			return Err(From::from(BlockError::InvalidBlockNonce(Mismatch { expected: mix, found: header.mix_hash() })));
+		}
+		if difficulty < header.difficulty {
+			return Err(From::from(BlockError::InvalidEthashDifficulty(Mismatch { expected: header.difficulty, found: difficulty })));
+		}
 		Ok(())
 	}
 
@@ -165,6 +183,27 @@ impl Ethash {
 		}
 		target
 	}
+	
+	fn boundary_to_difficulty(boundary: &H256) -> U256 {
+		U256::from((U512::one() << 256) / x!(U256::from(boundary.as_slice())))
+	}
+
+	fn to_ethash(hash: H256) -> EH256 {
+		unsafe { mem::transmute(hash) }
+	}
+
+	fn from_ethash(hash: EH256) -> H256 {
+		unsafe { mem::transmute(hash) }
+	}
+}
+
+impl Header {
+	fn nonce(&self) -> u64 {
+		decode(&self.seal()[1])
+	}
+	fn mix_hash(&self) -> H256 {
+		decode(&self.seal()[0])
+	}
 }
 
 #[test]

src/evm/interpreter.rs

@@ -27,6 +27,14 @@ fn color(instruction: Instruction, name: &'static str) -> String {
 	format!("\x1B[1;{}m{}\x1B[0m", colors[c], name)
 }
 
+macro_rules! overflowing {
+	($x: expr) => {{
+		let (v, overflow) = $x;
+		if overflow { return Err(evm::Error::OutOfGas); }
+		v
+	}}
+}
+
 type CodePosition = usize;
 type Gas = U256;
 type ProgramCounter = usize;
@@ -136,7 +144,7 @@ trait Memory {
 /// Checks whether offset and size is valid memory range
 fn is_valid_range(off: usize, size: usize)  -> bool {
 	// When size is zero we haven't actually expanded the memory
-	let (_a, overflow) = off.overflowing_add(size);
+	let overflow = off.overflowing_add(size).1;
 	size > 0 && !overflow
 }
 
@@ -235,15 +243,10 @@ impl<'a> CodeReader<'a> {
 	}
 }
 
-enum RequiredMem {
-	Mem(U256),
-	OutOfMemory
-}
-
 enum InstructionCost {
 	Gas(U256),
-	GasMem(U256, RequiredMem),
-	GasMemCopy(U256, RequiredMem, U256)
+	GasMem(U256, U256),
+	GasMemCopy(U256, U256, U256)
 }
 
 enum InstructionResult {
@@ -373,35 +376,31 @@ impl Interpreter {
 				InstructionCost::Gas(U256::from(schedule.sload_gas))
 			},
 			instructions::MSTORE => {
-				InstructionCost::GasMem(default_gas, self.mem_needed_const(stack.peek(0), 32))
+				InstructionCost::GasMem(default_gas, try!(self.mem_needed_const(stack.peek(0), 32)))
 			},
 			instructions::MLOAD => {
-				InstructionCost::GasMem(default_gas, self.mem_needed_const(stack.peek(0), 32))
+				InstructionCost::GasMem(default_gas, try!(self.mem_needed_const(stack.peek(0), 32)))
 			},
 			instructions::MSTORE8 => {
-				InstructionCost::GasMem(default_gas, self.mem_needed_const(stack.peek(0), 1))
+				InstructionCost::GasMem(default_gas, try!(self.mem_needed_const(stack.peek(0), 1)))
 			},
 			instructions::RETURN => {
-				InstructionCost::GasMem(default_gas, self.mem_needed(stack.peek(0), stack.peek(1)))
+				InstructionCost::GasMem(default_gas, try!(self.mem_needed(stack.peek(0), stack.peek(1))))
 			},
 			instructions::SHA3 => {
-				match add_u256_usize(stack.peek(1), 31) {
-					(_w, true) => InstructionCost::GasMem(U256::zero(), RequiredMem::OutOfMemory),
-					(w, false) => {
-						let words = w >> 5;
-						let gas = U256::from(schedule.sha3_gas) + (U256::from(schedule.sha3_word_gas) * words);
-						InstructionCost::GasMem(gas, self.mem_needed(stack.peek(0), stack.peek(1)))
-					}
-				}
+				let w = overflowing!(add_u256_usize(stack.peek(1), 31));
+				let words = w >> 5;
+				let gas = U256::from(schedule.sha3_gas) + (U256::from(schedule.sha3_word_gas) * words);
+				InstructionCost::GasMem(gas, try!(self.mem_needed(stack.peek(0), stack.peek(1))))
 			},
 			instructions::CALLDATACOPY => {
-				InstructionCost::GasMemCopy(default_gas, self.mem_needed(stack.peek(0), stack.peek(2)), stack.peek(2).clone())
+				InstructionCost::GasMemCopy(default_gas, try!(self.mem_needed(stack.peek(0), stack.peek(2))), stack.peek(2).clone())
 			},
 			instructions::CODECOPY => {
-				InstructionCost::GasMemCopy(default_gas, self.mem_needed(stack.peek(0), stack.peek(2)), stack.peek(2).clone())
+				InstructionCost::GasMemCopy(default_gas, try!(self.mem_needed(stack.peek(0), stack.peek(2))), stack.peek(2).clone())
 			},
 			instructions::EXTCODECOPY => {
-				InstructionCost::GasMemCopy(default_gas, self.mem_needed(stack.peek(1), stack.peek(3)), stack.peek(3).clone())
+				InstructionCost::GasMemCopy(default_gas, try!(self.mem_needed(stack.peek(1), stack.peek(3))), stack.peek(3).clone())
 			},
 			instructions::JUMPDEST => {
 				InstructionCost::Gas(U256::one())
@@ -409,50 +408,41 @@ impl Interpreter {
 			instructions::LOG0...instructions::LOG4 => {
 				let no_of_topics = instructions::get_log_topics(instruction);
 				let log_gas = schedule.log_gas + schedule.log_topic_gas * no_of_topics;
-				// TODO [todr] potential overflow of datagass
-				let data_gas = stack.peek(1).clone() * U256::from(schedule.log_data_gas);
-				let gas = try!(self.gas_add(data_gas, U256::from(log_gas)));
-				InstructionCost::GasMem(gas, self.mem_needed(stack.peek(0), stack.peek(1)))
+
+				let data_gas = overflowing!(stack.peek(1).overflowing_mul(U256::from(schedule.log_data_gas)));
+				let gas = overflowing!(data_gas.overflowing_add(U256::from(log_gas)));
+				InstructionCost::GasMem(gas, try!(self.mem_needed(stack.peek(0), stack.peek(1))))
 			},
 			instructions::CALL | instructions::CALLCODE => {
-				match add_u256_usize(stack.peek(0), schedule.call_gas) {
-					(_gas, true) => InstructionCost::GasMem(U256::zero(), RequiredMem::OutOfMemory),
-					(mut gas, false) => {
-						let mem = self.mem_max(
-							self.mem_needed(stack.peek(5), stack.peek(6)),
-							self.mem_needed(stack.peek(3), stack.peek(4))
-						);
-						
-						let address = u256_to_address(stack.peek(1));
+				let mut gas  = overflowing!(add_u256_usize(stack.peek(0), schedule.call_gas));
+				let mem = cmp::max(
+					try!(self.mem_needed(stack.peek(5), stack.peek(6))),
+					try!(self.mem_needed(stack.peek(3), stack.peek(4)))
+				);
+				
+				let address = u256_to_address(stack.peek(1));
 
-						// TODO [todr] Potential overflows
-						if instruction == instructions::CALL && !ext.exists(&address) {
-							gas = gas + U256::from(schedule.call_new_account_gas);
-						};
+				if instruction == instructions::CALL && !ext.exists(&address) {
+					gas = overflowing!(gas.overflowing_add(U256::from(schedule.call_new_account_gas)));
+				};
 
-						if stack.peek(2).clone() > U256::zero() {
-							gas = gas + U256::from(schedule.call_value_transfer_gas)
-						};
+				if stack.peek(2).clone() > U256::zero() {
+					gas = overflowing!(gas.overflowing_add(U256::from(schedule.call_value_transfer_gas)));
+				};
 
-						InstructionCost::GasMem(gas,mem)
-					}
-				}
+				InstructionCost::GasMem(gas,mem)
 			},
 			instructions::DELEGATECALL => {
-				match add_u256_usize(stack.peek(0), schedule.call_gas) {
-					(_gas, true) => InstructionCost::GasMem(U256::zero(), RequiredMem::OutOfMemory),
-					(gas, false) => {
-						let mem = self.mem_max(
-							self.mem_needed(stack.peek(4), stack.peek(5)),
-							self.mem_needed(stack.peek(2), stack.peek(3))
-						);
-						InstructionCost::GasMem(gas, mem)
-					}
-				}
+				let gas = overflowing!(add_u256_usize(stack.peek(0), schedule.call_gas));
+				let mem = cmp::max(
+					try!(self.mem_needed(stack.peek(4), stack.peek(5))),
+					try!(self.mem_needed(stack.peek(2), stack.peek(3)))
+				);
+				InstructionCost::GasMem(gas, mem)
 			},
 			instructions::CREATE => {
 				let gas = U256::from(schedule.create_gas);
-				let mem = self.mem_needed(stack.peek(1), stack.peek(2));
+				let mem = try!(self.mem_needed(stack.peek(1), stack.peek(2)));
 				InstructionCost::GasMem(gas, mem)
 			},
 			instructions::EXP => {
@@ -468,84 +458,57 @@ impl Interpreter {
 			InstructionCost::Gas(gas) => {
 				Ok((gas, 0))
 			},
-			InstructionCost::GasMem(gas, mem_size) => match mem_size {
-				RequiredMem::Mem(mem_size) => {
-					let (mem_gas, new_mem_size) = self.mem_gas_cost(schedule, mem.size(), &mem_size);
-					let gas = try!(self.gas_add(gas, mem_gas));
-					Ok((gas, new_mem_size))
-				},
-				RequiredMem::OutOfMemory => Err(evm::Error::OutOfGas)
+			InstructionCost::GasMem(gas, mem_size) => {
+				let (mem_gas, new_mem_size) = try!(self.mem_gas_cost(schedule, mem.size(), &mem_size));
+				let gas = overflowing!(gas.overflowing_add(mem_gas));
+				Ok((gas, new_mem_size))
 			},
-			InstructionCost::GasMemCopy(gas, mem_size, copy) => match mem_size {
-				RequiredMem::Mem(mem_size) => {
-					let (mem_gas, new_mem_size) = self.mem_gas_cost(schedule, mem.size(), &mem_size);
-					match add_u256_usize(&copy, 31) {
-						(_c, true) => Err(evm::Error::OutOfGas),
-						(copy, false) => {
-							let copy_gas = U256::from(schedule.copy_gas) * (copy / U256::from(32));
-							let gas = try!(self.gas_add(try!(self.gas_add(gas, copy_gas)), mem_gas));
-							Ok((gas, new_mem_size))
-						}
-					}
-				},
-				RequiredMem::OutOfMemory => Err(evm::Error::OutOfGas)
+			InstructionCost::GasMemCopy(gas, mem_size, copy) => {
+				let (mem_gas, new_mem_size) = try!(self.mem_gas_cost(schedule, mem.size(), &mem_size));
+				let copy = overflowing!(add_u256_usize(&copy, 31));
+				let copy_gas = U256::from(schedule.copy_gas) * (copy / U256::from(32));
+				let gas = overflowing!(gas.overflowing_add(copy_gas));
+				let gas = overflowing!(gas.overflowing_add(mem_gas));
+				Ok((gas, new_mem_size))
 			}
 		}
 	}
 
-	fn gas_add(&self, a: U256, b: U256) -> Result<U256, evm::Error> {
-		match a.overflowing_add(b) {
-			(_val, true) => Err(evm::Error::OutOfGas),
-			(val, false) => Ok(val)
-		}
-	}
-	
-	fn mem_gas_cost(&self, schedule: &evm::Schedule, current_mem_size: usize, mem_size: &U256) -> (U256, usize) {
+	fn mem_gas_cost(&self, schedule: &evm::Schedule, current_mem_size: usize, mem_size: &U256) -> Result<(U256, usize), evm::Error> {
 		let gas_for_mem = |mem_size: U256| {
 			let s = mem_size >> 5;
-			s * U256::from(schedule.memory_gas) + s * s / U256::from(schedule.quad_coeff_div)
+			// s * memory_gas + s * s / quad_coeff_div
+			let a = overflowing!(s.overflowing_mul(U256::from(schedule.memory_gas)));
+			// We need to go to U512 to calculate s*s/quad_coeff_div
+			let b = U512::from(s) * U512::from(s) / U512::from(schedule.quad_coeff_div);
+			if b > U512::from(!U256::zero()) {
+				Err(evm::Error::OutOfGas)
+			} else {
+				Ok(overflowing!(a.overflowing_add(U256::from(b))))
+			}
 		};
 		let current_mem_size = U256::from(current_mem_size);
-		let req_mem_size_rounded = ((mem_size.clone() + U256::from(31)) >> 5) << 5;
-		let new_mem_gas = gas_for_mem(U256::from(req_mem_size_rounded));
-		let current_mem_gas = gas_for_mem(current_mem_size);
+		let req_mem_size_rounded = (overflowing!(mem_size.overflowing_add(U256::from(31))) >> 5) << 5;
+		let new_mem_gas = try!(gas_for_mem(U256::from(req_mem_size_rounded)));
+		let current_mem_gas = try!(gas_for_mem(current_mem_size));
 
-		(if req_mem_size_rounded > current_mem_size {
+		Ok((if req_mem_size_rounded > current_mem_size {
 			new_mem_gas - current_mem_gas
 		} else {
 			U256::zero()
-		}, req_mem_size_rounded.low_u64() as usize)
+		}, req_mem_size_rounded.low_u64() as usize))
 	}
 
-	fn mem_max(&self, m_a: RequiredMem, m_b: RequiredMem) -> RequiredMem {
-		match (m_a, m_b) {
-			(RequiredMem::Mem(a), RequiredMem::Mem(b)) => {
-				RequiredMem::Mem(cmp::max(a, b))
-			},
-			(RequiredMem::OutOfMemory, _) | (_, RequiredMem::OutOfMemory) => {
-				RequiredMem::OutOfMemory
-			}
-		}
+	fn mem_needed_const(&self, mem: &U256, add: usize) -> Result<U256, evm::Error> {
+		Ok(overflowing!(mem.overflowing_add(U256::from(add))))
 	}
 
-	fn mem_needed_const(&self, mem: &U256, add: usize) -> RequiredMem {
-		match mem.overflowing_add(U256::from(add)) {
-			(_, true) => RequiredMem::OutOfMemory,
-			(mem, false) => RequiredMem::Mem(mem)
-		}
-	}
-
-	fn mem_needed(&self, offset: &U256, size: &U256) -> RequiredMem {
+	fn mem_needed(&self, offset: &U256, size: &U256) -> Result<U256, ::evm::Error> {
 		if self.is_zero(size) {
-			return RequiredMem::Mem(U256::zero());
+			return Ok(U256::zero());
 		}
 
-		match offset.clone().overflowing_add(size.clone()) {
-			(_result, true) => RequiredMem::OutOfMemory,
-			(result, false) => {
-					RequiredMem::Mem(result)
-			}
-		}
+		Ok(overflowing!(offset.overflowing_add(size.clone())))
 	}
 
 	fn exec_instruction(&self,
@@ -646,7 +609,6 @@ impl Interpreter {
 
 				return match call_result {
 					MessageCallResult::Success(gas_left) => {
-						println!("Unused: {}", gas_left);
 						stack.push(U256::one());
 						Ok(InstructionResult::UnusedGas(gas_left))
 					},
@@ -906,41 +868,34 @@ impl Interpreter {
 			instructions::ADD => {
 				let a = stack.pop_back();
 				let b = stack.pop_back();
-				let (c, _overflow) = a.overflowing_add(b);
-				stack.push(c);
+				stack.push(a.overflowing_add(b).0);
 			},
 			instructions::MUL => {
 				let a = stack.pop_back();
 				let b = stack.pop_back();
-				let (c, _overflow) = a.overflowing_mul(b);
-				stack.push(c);
+				stack.push(a.overflowing_mul(b).0);
 			},
 			instructions::SUB => {
 				let a = stack.pop_back();
 				let b = stack.pop_back();
-				let (c, _overflow) = a.overflowing_sub(b);
-				stack.push(c);
+				stack.push(a.overflowing_sub(b).0);
 			},
 			instructions::DIV => {
 				let a = stack.pop_back();
 				let b = stack.pop_back();
-				stack.push(match !self.is_zero(&b) {
-					true => {
-						let (c, _overflow) = a.overflowing_div(b);
-						c
-					},
-					false => U256::zero()
+				stack.push(if !self.is_zero(&b) {
+					a.overflowing_div(b).0
+				} else {
+					U256::zero() 
 				});
 			},
 			instructions::MOD => {
 				let a = stack.pop_back();
 				let b = stack.pop_back();
-				stack.push(match !self.is_zero(&b) {
-					true => {
-						let (c, _overflow) = a.overflowing_rem(b);
-						c
-					},
-					false => U256::zero()
+				stack.push(if !self.is_zero(&b) {
+					a.overflowing_rem(b).0
+				} else {
+					U256::zero()
 				});
 			},
 			instructions::SDIV => {
@@ -954,7 +909,7 @@ impl Interpreter {
 				} else if a == min && b == !U256::zero() {
 					min
 				} else {
-					let (c, _overflow) = a.overflowing_div(b);
+					let c = a.overflowing_div(b).0;
 					set_sign(c, sign_a ^ sign_b)
 				});
 			},
@@ -962,10 +917,10 @@ impl Interpreter {
 				let ua = stack.pop_back();
 				let ub = stack.pop_back();
 				let (a, sign_a) = get_and_reset_sign(ua);
-				let (b, _sign_b) = get_and_reset_sign(ub);
+				let b = get_and_reset_sign(ub).0;
 
 				stack.push(if !self.is_zero(&b) {
-					let (c, _overflow) = a.overflowing_rem(b);
+					let c = a.overflowing_rem(b).0;
 					set_sign(c, sign_a)
 				} else {
 					U256::zero()
@@ -974,7 +929,7 @@ impl Interpreter {
 			instructions::EXP => {
 				let base = stack.pop_back();
 				let expon = stack.pop_back();
-				let (res, _overflow) = base.overflowing_pow(expon);
+				let res = base.overflowing_pow(expon).0;
 				stack.push(res);
 			},
 			instructions::NOT => {
@@ -1052,8 +1007,8 @@ impl Interpreter {
 				stack.push(if !self.is_zero(&c) {
 					// upcast to 512
 					let a5 = U512::from(a);
-					let (res, _overflow) = a5.overflowing_add(U512::from(b));
-					let (x, _overflow) = res.overflowing_rem(U512::from(c));
+					let res = a5.overflowing_add(U512::from(b)).0;
+					let x = res.overflowing_rem(U512::from(c)).0;
 					U256::from(x)
 				} else {
 					U256::zero()
@@ -1066,8 +1021,8 @@ impl Interpreter {
 
 				stack.push(if !self.is_zero(&c) {
 					let a5 = U512::from(a);
-					let (res, _overflow) = a5.overflowing_mul(U512::from(b));
-					let (x, _overflow) = res.overflowing_rem(U512::from(c));
+					let res = a5.overflowing_mul(U512::from(b)).0;
+					let x = res.overflowing_rem(U512::from(c)).0;
 					U256::from(x)
 				} else {
 					U256::zero()
@@ -1123,8 +1078,7 @@ fn get_and_reset_sign(value: U256) -> (U256, bool) {
 
 fn set_sign(value: U256, sign: bool) -> U256 {
 	if sign {
-		let (val, _overflow) = (!U256::zero() ^ value).overflowing_add(U256::one());
-		val
+		(!U256::zero() ^ value).overflowing_add(U256::one()).0
 	} else {
 		value
 	}
@@ -1145,6 +1099,23 @@ fn address_to_u256(value: Address) -> U256 {
 	U256::from(H256::from(value).as_slice())
 }
 
+#[test]
+fn test_mem_gas_cost() {
+	// given
+	let interpreter = Interpreter;
+	let schedule = evm::Schedule::default();
+	let current_mem_size = 5;
+	let mem_size = !U256::zero();
+
+	// when
+	let result = interpreter.mem_gas_cost(&schedule, current_mem_size, &mem_size);
+
+	// then
+	if let Ok(_) = result {
+		assert!(false, "Should fail with OutOfGas");
+	}
+}
+
 #[cfg(test)]
 mod tests {
 	use common::*;
@@ -1173,7 +1144,7 @@ mod tests {
 		let mem_size = U256::from(5);
 	
 		// when
-		let (mem_cost, mem_size) = interpreter.mem_gas_cost(&schedule, current_mem_size, &mem_size);
+		let (mem_cost, mem_size) = interpreter.mem_gas_cost(&schedule, current_mem_size, &mem_size).unwrap();
 
 		// then
 		assert_eq!(mem_cost, U256::from(3));

src/header.rs

@@ -32,6 +32,7 @@ pub struct Header {
 	pub seal: Vec<Bytes>,
 
 	pub hash: RefCell<Option<H256>>,
+	pub bare_hash: RefCell<Option<H256>>,
 }
 
 impl Header {
@@ -56,6 +57,7 @@ impl Header {
 			difficulty: ZERO_U256,
 			seal: vec![],
 			hash: RefCell::new(None),
+			bare_hash: RefCell::new(None),
 		}
 	}
 
@@ -99,13 +101,24 @@ impl Header {
 		}
 	}
 
+	/// Get the hash of the header excluding the seal
+	pub fn bare_hash(&self) -> H256 {
+		let mut hash = self.bare_hash.borrow_mut();
+		match &mut *hash {
+			&mut Some(ref h) => h.clone(),
+			hash @ &mut None => {
+				*hash = Some(self.rlp_sha3(Seal::Without));
+				hash.as_ref().unwrap().clone()
+			}
+		}
+	}
+
 	/// Note that some fields have changed. Resets the memoised hash.
 	pub fn note_dirty(&self) {
  		*self.hash.borrow_mut() = None;
+ 		*self.bare_hash.borrow_mut() = None;
 	}
 
-	// TODO: get hash without seal.
-
 	// TODO: make these functions traity 
 	pub fn stream_rlp(&self, s: &mut RlpStream, with_seal: Seal) {
 		s.append_list(13 + match with_seal { Seal::With => self.seal.len(), _ => 0 });
@@ -156,7 +169,8 @@ impl Decodable for Header {
 			timestamp: try!(r.val_at(11)),
 			extra_data: try!(r.val_at(12)),
 			seal: vec![],
-			hash: RefCell::new(Some(r.as_raw().sha3()))
+			hash: RefCell::new(Some(r.as_raw().sha3())),
+			bare_hash: RefCell::new(None),
 		};
 
 		for i in 13..r.item_count() {

src/spec.rs

@@ -137,6 +137,7 @@ impl Spec {
 				(0..self.seal_fields).map(|i| r.at(i).as_raw().to_vec()).collect()
 			},
 			hash: RefCell::new(None),
+			bare_hash: RefCell::new(None),
 		}
 	}
 

src/verification.rs

@@ -201,7 +201,9 @@ mod tests {
 	use views::*;
 	use blockchain::*;
 	use engine::*;
-	use ethereum;
+	use spec::*;
+	use transaction::*;
+	use basic_types::*;
 
 	fn create_test_block(header: &Header) -> Bytes {
 		let mut rlp = RlpStream::new_list(3);
@@ -211,12 +213,12 @@ mod tests {
 		rlp.out()
 	}
 
-	fn create_test_block_with_data(header: &Header, transactions: &[Bytes], uncles: &[Header]) -> Bytes {
+	fn create_test_block_with_data(header: &Header, transactions: &[&Transaction], uncles: &[Header]) -> Bytes {
 		let mut rlp = RlpStream::new_list(3);
 		rlp.append(header);
 		rlp.append_list(transactions.len());
 		for t in transactions {
-			rlp.append_raw(t, 1);
+			rlp.append_raw(&t.rlp_bytes_opt(Seal::With), 1);
 		}
 		rlp.append_list(uncles.len());
 		for h in uncles {
@@ -301,7 +303,7 @@ mod tests {
 	fn test_verify_block() {
 		// Test against morden
 		let mut good = Header::new();
-		let spec = ethereum::new_morden();
+		let spec = Spec::new_test();
 		let engine = spec.to_engine().unwrap();
 
 		let min_gas_limit = decode(engine.spec().engine_params.get("minGasLimit").unwrap());
@@ -311,7 +313,9 @@ mod tests {
 		good.timestamp = 40;
 		good.number = 10;
 
-		let good_transactions = vec![ vec![ 1u8 ], vec![ 2u8 ] ]; // TODO: proper transactions
+		let tr1 = Transaction::new_create(x!(0), Bytes::new(), x!(30000), x!(40000), x!(1));
+		let tr2 = Transaction::new_create(x!(0), Bytes::new(), x!(30000), x!(40000), x!(2));
+		let good_transactions = [ &tr1, &tr2 ];
 
 		let diff_inc = U256::from(0x40);
 
@@ -346,7 +350,7 @@ mod tests {
 		let mut uncles_rlp = RlpStream::new();
 		uncles_rlp.append(&good_uncles);
 		let good_uncles_hash = uncles_rlp.as_raw().sha3();
-		let good_transactions_root = ordered_trie_root(good_transactions.clone());
+		let good_transactions_root = ordered_trie_root(good_transactions.iter().map(|t| t.rlp_bytes_opt(Seal::With)).collect());
 
 		let mut parent = good.clone();
 		parent.number = 9;

util/src/crypto.rs

@@ -8,6 +8,10 @@ pub type Secret = H256;
 pub type Public = H512;
 pub type Signature = H520;
 
+lazy_static! {
+	static ref SECP256K1: Secp256k1 = Secp256k1::new();
+}
+
 impl Signature {
 	/// Create a new signature from the R, S and V componenets.
 	pub fn from_rsv(r: &H256, s: &H256, v: u8) -> Signature {
@@ -82,10 +86,10 @@ pub struct KeyPair {
 impl KeyPair {
 	/// Create a pair from secret key
 	pub fn from_secret(secret: Secret) -> Result<KeyPair, CryptoError> {
-		let context = Secp256k1::new();
-		let s: key::SecretKey = try!(key::SecretKey::from_slice(&context, &secret));
-		let pub_key = try!(key::PublicKey::from_secret_key(&context, &s));
-		let serialized = pub_key.serialize_vec(&context, false);
+		let context = &SECP256K1;
+		let s: key::SecretKey = try!(key::SecretKey::from_slice(context, &secret));
+		let pub_key = try!(key::PublicKey::from_secret_key(context, &s));
+		let serialized = pub_key.serialize_vec(context, false);
 		let p: Public = Public::from_slice(&serialized[1..65]);
 		Ok(KeyPair {
 			secret: secret,
@@ -94,10 +98,10 @@ impl KeyPair {
 	}
 	/// Create a new random key pair
 	pub fn create() -> Result<KeyPair, CryptoError> {
-		let context = Secp256k1::new();
+		let context = &SECP256K1;
 		let mut rng = try!(OsRng::new());
 		let (sec, publ) = try!(context.generate_keypair(&mut rng));
-		let serialized = publ.serialize_vec(&context, false);
+		let serialized = publ.serialize_vec(context, false);
 		let p: Public = Public::from_slice(&serialized[1..65]);
 		let s: Secret = unsafe { ::std::mem::transmute(sec) };
 		Ok(KeyPair {
@@ -128,10 +132,10 @@ pub mod ec {
 	/// Recovers Public key from signed message hash.
 	pub fn recover(signature: &Signature, message: &H256) -> Result<Public, CryptoError> {
 		use secp256k1::*;
-		let context = Secp256k1::new();
-		let rsig = try!(RecoverableSignature::from_compact(&context, &signature[0..64], try!(RecoveryId::from_i32(signature[64] as i32))));
+		let context = &crypto::SECP256K1;
+		let rsig = try!(RecoverableSignature::from_compact(context, &signature[0..64], try!(RecoveryId::from_i32(signature[64] as i32))));
 		let publ = try!(context.recover(&try!(Message::from_slice(&message)), &rsig));
-		let serialized = publ.serialize_vec(&context, false);
+		let serialized = publ.serialize_vec(context, false);
 		let p: Public = Public::from_slice(&serialized[1..65]);
 		//TODO: check if it's the zero key and fail if so.
 		Ok(p)
@@ -140,10 +144,10 @@ pub mod ec {
 	pub fn sign(secret: &Secret, message: &H256) -> Result<Signature, CryptoError> {
 		// TODO: allow creation of only low-s signatures.
 		use secp256k1::*;
-		let context = Secp256k1::new();
+		let context = &crypto::SECP256K1;
 		let sec: &key::SecretKey = unsafe { ::std::mem::transmute(secret) };
 		let s = try!(context.sign_recoverable(&try!(Message::from_slice(&message)), sec));
-		let (rec_id, data) = s.serialize_compact(&context);
+		let (rec_id, data) = s.serialize_compact(context);
 		let mut signature: crypto::Signature = unsafe { ::std::mem::uninitialized() };
 		signature.clone_from_slice(&data);
 		signature[64] = rec_id.to_i32() as u8;
@@ -152,15 +156,15 @@ pub mod ec {
 	/// Verify signature.
 	pub fn verify(public: &Public, signature: &Signature, message: &H256) -> Result<bool, CryptoError> {
 		use secp256k1::*;
-		let context = Secp256k1::new();
-		let rsig = try!(RecoverableSignature::from_compact(&context, &signature[0..64], try!(RecoveryId::from_i32(signature[64] as i32))));
-		let sig = rsig.to_standard(&context);
+		let context = &crypto::SECP256K1;
+		let rsig = try!(RecoverableSignature::from_compact(context, &signature[0..64], try!(RecoveryId::from_i32(signature[64] as i32))));
+		let sig = rsig.to_standard(context);
 
 		let mut pdata: [u8; 65] = [4u8; 65];
 		let ptr = pdata[1..].as_mut_ptr();
 		let src = public.as_ptr();
 		unsafe { ::std::ptr::copy_nonoverlapping(src, ptr, 64) };
-		let publ = try!(key::PublicKey::from_slice(&context, &pdata));
+		let publ = try!(key::PublicKey::from_slice(context, &pdata));
 		match context.verify(&try!(Message::from_slice(&message)), &sig, &publ) {
 			Ok(_) => Ok(true),
 			Err(Error::IncorrectSignature) => Ok(false),
@@ -190,17 +194,18 @@ pub mod ec {
 
 pub mod ecdh {
 	use crypto::*;
+	use crypto::{self};
 
 	pub fn agree(secret: &Secret, public: &Public, ) -> Result<Secret, CryptoError> {
 		use secp256k1::*;
-		let context = Secp256k1::new();
+		let context = &crypto::SECP256K1;
 		let mut pdata: [u8; 65] = [4u8; 65];
 		let ptr = pdata[1..].as_mut_ptr();
 		let src = public.as_ptr();
 		unsafe { ::std::ptr::copy_nonoverlapping(src, ptr, 64) };
-		let publ = try!(key::PublicKey::from_slice(&context, &pdata));
+		let publ = try!(key::PublicKey::from_slice(context, &pdata));
 		let sec: &key::SecretKey = unsafe { ::std::mem::transmute(secret) };
-		let shared = ecdh::SharedSecret::new_raw(&context, &publ, &sec);
+		let shared = ecdh::SharedSecret::new_raw(context, &publ, &sec);
 		let s: Secret = unsafe { ::std::mem::transmute(shared) };
 		Ok(s)
 	}