From e39e7491b84da3eb3ddcca153d07fbcea0ef90ac Mon Sep 17 00:00:00 2001 From: arkpar Date: Sun, 17 Jan 2016 12:00:34 +0100 Subject: [PATCH] Use ethash for verification --- Cargo.toml | 1 + ethash/Cargo.toml | 9 + ethash/src/compute.rs | 294 ++++++++++++++++ ethash/src/lib.rs | 42 +++ ethash/src/sizes.rs | 772 +++++++++++++++++++++++++++++++++++++++++ src/error.rs | 1 + src/ethereum/ethash.rs | 50 ++- src/header.rs | 20 +- src/spec.rs | 1 + 9 files changed, 1183 insertions(+), 7 deletions(-) create mode 100644 ethash/Cargo.toml create mode 100644 ethash/src/compute.rs create mode 100644 ethash/src/lib.rs create mode 100644 ethash/src/sizes.rs diff --git a/Cargo.toml b/Cargo.toml index d9092de53..14164a735 100644 --- a/Cargo.toml +++ b/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] default = ["jit"] diff --git a/ethash/Cargo.toml b/ethash/Cargo.toml new file mode 100644 index 000000000..2633a85eb --- /dev/null +++ b/ethash/Cargo.toml @@ -0,0 +1,9 @@ +[package] +name = "ethash" +version = "0.1.0" +authors = ["arkpar 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, +} + +/// 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[..]); +} diff --git a/ethash/src/lib.rs b/ethash/src/lib.rs new file mode 100644 index 000000000..166574bef --- /dev/null +++ b/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>, +} + +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) + } +} diff --git a/ethash/src/sizes.rs b/ethash/src/sizes.rs new file mode 100644 index 000000000..40840eb84 --- /dev/null +++ b/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, + 2919234688u64, 2927622784u64, 2936011648u64, 2944400768u64, 2952789376u64, + 2961177728u64, 2969565568u64, 2977951616u64, 2986338944u64, 2994731392u64, + 3003120256u64, 3011508352u64, 3019895936u64, 3028287104u64, 3036675968u64, + 3045063808u64, 3053452928u64, 3061837696u64, 3070228352u64, 3078615424u64, + 3087003776u64, 3095394944u64, 3103782272u64, 3112173184u64, 3120562048u64, + 3128944768u64, 3137339264u64, 3145725056u64, 3154109312u64, 3162505088u64, + 3170893184u64, 3179280256u64, 3187669376u64, 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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, + 29621824u64, 29752256u64, 29882816u64, 30014912u64, 30144448u64, 30273728u64, 30406976u64, + 30538432u64, 30670784u64, 30799936u64, 30932672u64, 31063744u64, 31195072u64, 31325248u64, + 31456192u64, 31588288u64, 31719232u64, 31850432u64, 31981504u64, 32110784u64, 32243392u64, + 32372672u64, 32505664u64, 32636608u64, 32767808u64, 32897344u64, 33029824u64, 33160768u64, + 33289664u64, 33423296u64, 33554368u64, 33683648u64, 33816512u64, 33947456u64, 34076992u64, + 34208704u64, 34340032u64, 34471744u64, 34600256u64, 34734016u64, 34864576u64, 34993984u64, + 35127104u64, 35258176u64, 35386688u64, 35518528u64, 35650624u64, 35782336u64, 35910976u64, + 36044608u64, 36175808u64, 36305728u64, 36436672u64, 36568384u64, 36699968u64, 36830656u64, + 36961984u64, 37093312u64, 37223488u64, 37355072u64, 37486528u64, 37617472u64, 37747904u64, + 37879232u64, 38009792u64, 38141888u64, 38272448u64, 38403392u64, 38535104u64, 38660672u64, + 38795584u64, 38925632u64, 39059264u64, 39190336u64, 39320768u64, 39452096u64, 39581632u64, + 39713984u64, 39844928u64, 39974848u64, 40107968u64, 40238144u64, 40367168u64, 40500032u64, + 40631744u64, 40762816u64, 40894144u64, 41023552u64, 41155904u64, 41286208u64, 41418304u64, + 41547712u64, 41680448u64, 41811904u64, 41942848u64, 42073792u64, 42204992u64, 42334912u64, + 42467008u64, 42597824u64, 42729152u64, 42860096u64, 42991552u64, 43122368u64, 43253696u64, + 43382848u64, 43515712u64, 43646912u64, 43777088u64, 43907648u64, 44039104u64, 44170432u64, + 44302144u64, 44433344u64, 44564288u64, 44694976u64, 44825152u64, 44956864u64, 45088448u64, + 45219008u64, 45350464u64, 45481024u64, 45612608u64, 45744064u64, 45874496u64, 46006208u64, + 46136768u64, 46267712u64, 46399424u64, 46529344u64, 46660672u64, 46791488u64, 46923328u64, + 47053504u64, 47185856u64, 47316928u64, 47447872u64, 47579072u64, 47710144u64, 47839936u64, + 47971648u64, 48103232u64, 48234176u64, 48365248u64, 48496192u64, 48627136u64, 48757312u64, + 48889664u64, 49020736u64, 49149248u64, 49283008u64, 49413824u64, 49545152u64, 49675712u64, + 49807168u64, 49938368u64, 50069056u64, 50200256u64, 50331584u64, 50462656u64, 50593472u64, + 50724032u64, 50853952u64, 50986048u64, 51117632u64, 51248576u64, 51379904u64, 51510848u64, + 51641792u64, 51773248u64, 51903296u64, 52035136u64, 52164032u64, 52297664u64, 52427968u64, + 52557376u64, 52690112u64, 52821952u64, 52952896u64, 53081536u64, 53213504u64, 53344576u64, + 53475776u64, 53608384u64, 53738816u64, 53870528u64, 54000832u64, 54131776u64, 54263744u64, + 54394688u64, 54525248u64, 54655936u64, 54787904u64, 54918592u64, 55049152u64, 55181248u64, + 55312064u64, 55442752u64, 55574336u64, 55705024u64, 55836224u64, 55967168u64, 56097856u64, + 56228672u64, 56358592u64, 56490176u64, 56621888u64, 56753728u64, 56884928u64, 57015488u64, + 57146816u64, 57278272u64, 57409216u64, 57540416u64, 57671104u64, 57802432u64, 57933632u64, + 58064576u64, 58195264u64, 58326976u64, 58457408u64, 58588864u64, 58720192u64, 58849984u64, + 58981696u64, 59113024u64, 59243456u64, 59375552u64, 59506624u64, 59637568u64, 59768512u64, + 59897792u64, 60030016u64, 60161984u64, 60293056u64, 60423872u64, 60554432u64, 60683968u64, + 60817216u64, 60948032u64, 61079488u64, 61209664u64, 61341376u64, 61471936u64, 61602752u64, + 61733696u64, 61865792u64, 61996736u64, 62127808u64, 62259136u64, 62389568u64, 62520512u64, + 62651584u64, 62781632u64, 62910784u64, 63045056u64, 63176128u64, 63307072u64, 63438656u64, + 63569216u64, 63700928u64, 63831616u64, 63960896u64, 64093888u64, 64225088u64, 64355392u64, + 64486976u64, 64617664u64, 64748608u64, 64879424u64, 65009216u64, 65142464u64, 65273792u64, + 65402816u64, 65535424u64, 65666752u64, 65797696u64, 65927744u64, 66060224u64, 66191296u64, + 66321344u64, 66453056u64, 66584384u64, 66715328u64, 66846656u64, 66977728u64, 67108672u64, + 67239104u64, 67370432u64, 67501888u64, 67631296u64, 67763776u64, 67895104u64, 68026304u64, + 68157248u64, 68287936u64, 68419264u64, 68548288u64, 68681408u64, 68811968u64, 68942912u64, + 69074624u64, 69205568u64, 69337024u64, 69467584u64, 69599168u64, 69729472u64, 69861184u64, + 69989824u64, 70122944u64, 70253888u64, 70385344u64, 70515904u64, 70647232u64, 70778816u64, + 70907968u64, 71040832u64, 71171648u64, 71303104u64, 71432512u64, 71564992u64, 71695168u64, + 71826368u64, 71958464u64, 72089536u64, 72219712u64, 72350144u64, 72482624u64, 72613568u64, + 72744512u64, 72875584u64, 73006144u64, 73138112u64, 73268672u64, 73400128u64, 73530944u64, + 73662272u64, 73793344u64, 73924544u64, 74055104u64, 74185792u64, 74316992u64, 74448832u64, + 74579392u64, 74710976u64, 74841664u64, 74972864u64, 75102784u64, 75233344u64, 75364544u64, + 75497024u64, 75627584u64, 75759296u64, 75890624u64, 76021696u64, 76152256u64, 76283072u64, + 76414144u64, 76545856u64, 76676672u64, 76806976u64, 76937792u64, 77070016u64, 77200832u64, + 77331392u64, 77462464u64, 77593664u64, 77725376u64, 77856448u64, 77987776u64, 78118336u64, + 78249664u64, 78380992u64, 78511424u64, 78642496u64, 78773056u64, 78905152u64, 79033664u64, + 79166656u64, 79297472u64, 79429568u64, 79560512u64, 79690816u64, 79822784u64, 79953472u64, + 80084672u64, 80214208u64, 80346944u64, 80477632u64, 80608576u64, 80740288u64, 80870848u64, + 81002048u64, 81133504u64, 81264448u64, 81395648u64, 81525952u64, 81657536u64, 81786304u64, + 81919808u64, 82050112u64, 82181312u64, 82311616u64, 82443968u64, 82573376u64, 82705984u64, + 82835776u64, 82967744u64, 83096768u64, 83230528u64, 83359552u64, 83491264u64, 83622464u64, + 83753536u64, 83886016u64, 84015296u64, 84147776u64, 84277184u64, 84409792u64, 84540608u64, + 84672064u64, 84803008u64, 84934336u64, 85065152u64, 85193792u64, 85326784u64, 85458496u64, + 85589312u64, 85721024u64, 85851968u64, 85982656u64, 86112448u64, 86244416u64, 86370112u64, + 86506688u64, 86637632u64, 86769344u64, 86900672u64, 87031744u64, 87162304u64, 87293632u64, + 87424576u64, 87555392u64, 87687104u64, 87816896u64, 87947968u64, 88079168u64, 88211264u64, + 88341824u64, 88473152u64, 88603712u64, 88735424u64, 88862912u64, 88996672u64, 89128384u64, + 89259712u64, 89390272u64, 89521984u64, 89652544u64, 89783872u64, 89914816u64, 90045376u64, + 90177088u64, 90307904u64, 90438848u64, 90569152u64, 90700096u64, 90832832u64, 90963776u64, + 91093696u64, 91223744u64, 91356992u64, 91486784u64, 91618496u64, 91749824u64, 91880384u64, + 92012224u64, 92143552u64, 92273344u64, 92405696u64, 92536768u64, 92666432u64, 92798912u64, + 92926016u64, 93060544u64, 93192128u64, 93322816u64, 93453632u64, 93583936u64, 93715136u64, + 93845056u64, 93977792u64, 94109504u64, 94240448u64, 94371776u64, 94501184u64, 94632896u64, + 94764224u64, 94895552u64, 95023424u64, 95158208u64, 95287744u64, 95420224u64, 95550016u64, + 95681216u64, 95811904u64, 95943872u64, 96075328u64, 96203584u64, 96337856u64, 96468544u64, + 96599744u64, 96731072u64, 96860992u64, 96992576u64, 97124288u64, 97254848u64, 97385536u64, + 97517248u64, 97647808u64, 97779392u64, 97910464u64, 98041408u64, 98172608u64, 98303168u64, + 98434496u64, 98565568u64, 98696768u64, 98827328u64, 98958784u64, 99089728u64, 99220928u64, + 99352384u64, 99482816u64, 99614272u64, 99745472u64, 99876416u64, 100007104u64, + 100138048u64, 100267072u64, 100401088u64, 100529984u64, 100662592u64, 100791872u64, + 100925248u64, 101056064u64, 101187392u64, 101317952u64, 101449408u64, 101580608u64, + 101711296u64, 101841728u64, 101973824u64, 102104896u64, 102235712u64, 102366016u64, + 102498112u64, 102628672u64, 102760384u64, 102890432u64, 103021888u64, 103153472u64, + 103284032u64, 103415744u64, 103545152u64, 103677248u64, 103808576u64, 103939648u64, + 104070976u64, 104201792u64, 104332736u64, 104462528u64, 104594752u64, 104725952u64, + 104854592u64, 104988608u64, 105118912u64, 105247808u64, 105381184u64, 105511232u64, + 105643072u64, 105774784u64, 105903296u64, 106037056u64, 106167872u64, 106298944u64, + 106429504u64, 106561472u64, 106691392u64, 106822592u64, 106954304u64, 107085376u64, + 107216576u64, 107346368u64, 107478464u64, 107609792u64, 107739712u64, 107872192u64, + 108003136u64, 108131392u64, 108265408u64, 108396224u64, 108527168u64, 108657344u64, + 108789568u64, 108920384u64, 109049792u64, 109182272u64, 109312576u64, 109444928u64, + 109572928u64, 109706944u64, 109837888u64, 109969088u64, 110099648u64, 110230976u64, + 110362432u64, 110492992u64, 110624704u64, 110755264u64, 110886208u64, 111017408u64, + 111148864u64, 111279296u64, 111410752u64, 111541952u64, 111673024u64, 111803456u64, + 111933632u64, 112066496u64, 112196416u64, 112328512u64, 112457792u64, 112590784u64, + 112715968u64, 112852672u64, 112983616u64, 113114944u64, 113244224u64, 113376448u64, + 113505472u64, 113639104u64, 113770304u64, 113901376u64, 114031552u64, 114163264u64, + 114294592u64, 114425536u64, 114556864u64, 114687424u64, 114818624u64, 114948544u64, + 115080512u64, 115212224u64, 115343296u64, 115473472u64, 115605184u64, 115736128u64, + 115867072u64, 115997248u64, 116128576u64, 116260288u64, 116391488u64, 116522944u64, + 116652992u64, 116784704u64, 116915648u64, 117046208u64, 117178304u64, 117308608u64, + 117440192u64, 117569728u64, 117701824u64, 117833024u64, 117964096u64, 118094656u64, + 118225984u64, 118357312u64, 118489024u64, 118617536u64, 118749632u64, 118882112u64, + 119012416u64, 119144384u64, 119275328u64, 119406016u64, 119537344u64, 119668672u64, + 119798464u64, 119928896u64, 120061376u64, 120192832u64, 120321728u64, 120454336u64, + 120584512u64, 120716608u64, 120848192u64, 120979136u64, 121109056u64, 121241408u64, + 121372352u64, 121502912u64, 121634752u64, 121764416u64, 121895744u64, 122027072u64, + 122157632u64, 122289088u64, 122421184u64, 122550592u64, 122682944u64, 122813888u64, + 122945344u64, 123075776u64, 123207488u64, 123338048u64, 123468736u64, 123600704u64, + 123731264u64, 123861952u64, 123993664u64, 124124608u64, 124256192u64, 124386368u64, + 124518208u64, 124649024u64, 124778048u64, 124911296u64, 125041088u64, 125173696u64, + 125303744u64, 125432896u64, 125566912u64, 125696576u64, 125829056u64, 125958592u64, + 126090304u64, 126221248u64, 126352832u64, 126483776u64, 126615232u64, 126746432u64, + 126876608u64, 127008704u64, 127139392u64, 127270336u64, 127401152u64, 127532224u64, + 127663552u64, 127794752u64, 127925696u64, 128055232u64, 128188096u64, 128319424u64, + 128449856u64, 128581312u64, 128712256u64, 128843584u64, 128973632u64, 129103808u64, + 129236288u64, 129365696u64, 129498944u64, 129629888u64, 129760832u64, 129892288u64, + 130023104u64, 130154048u64, 130283968u64, 130416448u64, 130547008u64, 130678336u64, + 130807616u64, 130939456u64, 131071552u64, 131202112u64, 131331776u64, 131464384u64, + 131594048u64, 131727296u64, 131858368u64, 131987392u64, 132120256u64, 132250816u64, + 132382528u64, 132513728u64, 132644672u64, 132774976u64, 132905792u64, 133038016u64, + 133168832u64, 133299392u64, 133429312u64, 133562048u64, 133692992u64, 133823296u64, + 133954624u64, 134086336u64, 134217152u64, 134348608u64, 134479808u64, 134607296u64, + 134741056u64, 134872384u64, 135002944u64, 135134144u64, 135265472u64, 135396544u64, + 135527872u64, 135659072u64, 135787712u64, 135921472u64, 136052416u64, 136182848u64, + 136313792u64, 136444864u64, 136576448u64, 136707904u64, 136837952u64, 136970048u64, + 137099584u64, 137232064u64, 137363392u64, 137494208u64, 137625536u64, 137755712u64, + 137887424u64, 138018368u64, 138149824u64, 138280256u64, 138411584u64, 138539584u64, + 138672832u64, 138804928u64, 138936128u64, 139066688u64, 139196864u64, 139328704u64, + 139460032u64, 139590208u64, 139721024u64, 139852864u64, 139984576u64, 140115776u64, + 140245696u64, 140376512u64, 140508352u64, 140640064u64, 140769856u64, 140902336u64, + 141032768u64, 141162688u64, 141294016u64, 141426496u64, 141556544u64, 141687488u64, + 141819584u64, 141949888u64, 142080448u64, 142212544u64, 142342336u64, 142474432u64, + 142606144u64, 142736192u64, 142868288u64, 142997824u64, 143129408u64, 143258944u64, + 143392448u64, 143523136u64, 143653696u64, 143785024u64, 143916992u64, 144045632u64, + 144177856u64, 144309184u64, 144440768u64, 144570688u64, 144701888u64, 144832448u64, + 144965056u64, 145096384u64, 145227584u64, 145358656u64, 145489856u64, 145620928u64, + 145751488u64, 145883072u64, 146011456u64, 146144704u64, 146275264u64, 146407232u64, + 146538176u64, 146668736u64, 146800448u64, 146931392u64, 147062336u64, 147193664u64, + 147324224u64, 147455936u64, 147586624u64, 147717056u64, 147848768u64, 147979456u64, + 148110784u64, 148242368u64, 148373312u64, 148503232u64, 148635584u64, 148766144u64, + 148897088u64, 149028416u64, 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284819264u64, + 284950208u64, 285081536u64 +]; + diff --git a/src/error.rs b/src/error.rs index 5be1074c1..088367ae3 100644 --- a/src/error.rs +++ b/src/error.rs @@ -62,6 +62,7 @@ pub enum BlockError { InvalidReceiptsStateRoot(Mismatch), InvalidTimestamp(OutOfBounds), InvalidLogBloom(Mismatch), + InvalidEthashDifficulty(Mismatch), InvalidBlockNonce(Mismatch), InvalidParentHash(Mismatch), InvalidNumber(OutOfBounds), diff --git a/src/ethereum/ethash.rs b/src/ethereum/ethash.rs index 989ab8cd9..9e19959cb 100644 --- a/src/ethereum/ethash.rs +++ b/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::*; @@ -8,11 +11,15 @@ use evm::Schedule; /// mainnet chains in the Olympic, Frontier and Homestead eras. pub struct Ethash { spec: Spec, + pow: EthashManager, } impl Ethash { pub fn new_boxed(spec: Spec) -> Box { - Box::new(Ethash{spec: spec}) + Box::new(Ethash { + spec: spec, + pow: EthashManager::new(), + }) } fn u256_param(&self, name: &str) -> U256 { self.spec().engine_params.get(name).map(|a| decode(&a)).unwrap_or(U256::from(0u64)) } @@ -69,12 +76,26 @@ 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(()) } @@ -131,6 +152,27 @@ 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] diff --git a/src/header.rs b/src/header.rs index 9226137b3..0986a0d80 100644 --- a/src/header.rs +++ b/src/header.rs @@ -32,6 +32,7 @@ pub struct Header { pub seal: Vec, pub hash: RefCell>, + pub bare_hash: RefCell>, } 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() { diff --git a/src/spec.rs b/src/spec.rs index e1d4a3cad..b174b0e9f 100644 --- a/src/spec.rs +++ b/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), } }