diff options
Diffstat (limited to 'pow')
| -rw-r--r-- | pow/ethash.go | 589 | ||||
| -rw-r--r-- | pow/ethash_algo.go | 1103 | ||||
| -rw-r--r-- | pow/ethash_algo_go1.7.go | 47 | ||||
| -rw-r--r-- | pow/ethash_algo_go1.8.go | 57 | ||||
| -rw-r--r-- | pow/ethash_algo_go1.8_test.go | 46 | ||||
| -rw-r--r-- | pow/ethash_algo_test.go | 774 | ||||
| -rw-r--r-- | pow/pow.go | 58 | ||||
| -rw-r--r-- | pow/xor.go | 85 |
8 files changed, 0 insertions, 2759 deletions
diff --git a/pow/ethash.go b/pow/ethash.go deleted file mode 100644 index 9adc38540..000000000 --- a/pow/ethash.go +++ /dev/null @@ -1,589 +0,0 @@ -// Copyright 2017 The go-ethereum Authors -// This file is part of the go-ethereum library. -// -// The go-ethereum library is free software: you can redistribute it and/or modify -// it under the terms of the GNU Lesser General Public License as published by -// the Free Software Foundation, either version 3 of the License, or -// (at your option) any later version. -// -// The go-ethereum library is distributed in the hope that it will be useful, -// but WITHOUT ANY WARRANTY; without even the implied warranty of -// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the -// GNU Lesser General Public License for more details. -// -// You should have received a copy of the GNU Lesser General Public License -// along with the go-ethereum library. If not, see <http://www.gnu.org/licenses/>. - -package pow - -import ( - "bytes" - "errors" - "fmt" - "math" - "math/big" - "math/rand" - "os" - "path/filepath" - "reflect" - "strconv" - "sync" - "time" - "unsafe" - - mmap "github.com/edsrzf/mmap-go" - "github.com/ethereum/go-ethereum/log" - metrics "github.com/rcrowley/go-metrics" -) - -var ( - ErrInvalidDumpMagic = errors.New("invalid dump magic") - ErrNonceOutOfRange = errors.New("nonce out of range") - ErrInvalidDifficulty = errors.New("non-positive difficulty") - ErrInvalidMixDigest = errors.New("invalid mix digest") - ErrInvalidPoW = errors.New("pow difficulty invalid") -) - -var ( - // maxUint256 is a big integer representing 2^256-1 - maxUint256 = new(big.Int).Exp(big.NewInt(2), big.NewInt(256), big.NewInt(0)) - - // sharedEthash is a full instance that can be shared between multiple users. - sharedEthash = NewFullEthash("", 3, 0, "", 1, 0) - - // algorithmRevision is the data structure version used for file naming. - algorithmRevision = 23 - - // dumpMagic is a dataset dump header to sanity check a data dump. - dumpMagic = []uint32{0xbaddcafe, 0xfee1dead} -) - -// isLittleEndian returns whether the local system is running in little or big -// endian byte order. -func isLittleEndian() bool { - n := uint32(0x01020304) - return *(*byte)(unsafe.Pointer(&n)) == 0x04 -} - -// memoryMap tries to memory map a file of uint32s for read only access. -func memoryMap(path string) (*os.File, mmap.MMap, []uint32, error) { - file, err := os.OpenFile(path, os.O_RDONLY, 0644) - if err != nil { - return nil, nil, nil, err - } - mem, buffer, err := memoryMapFile(file, false) - if err != nil { - file.Close() - return nil, nil, nil, err - } - for i, magic := range dumpMagic { - if buffer[i] != magic { - mem.Unmap() - file.Close() - return nil, nil, nil, ErrInvalidDumpMagic - } - } - return file, mem, buffer[len(dumpMagic):], err -} - -// memoryMapFile tries to memory map an already opened file descriptor. -func memoryMapFile(file *os.File, write bool) (mmap.MMap, []uint32, error) { - // Try to memory map the file - flag := mmap.RDONLY - if write { - flag = mmap.RDWR - } - mem, err := mmap.Map(file, flag, 0) - if err != nil { - return nil, nil, err - } - // Yay, we managed to memory map the file, here be dragons - header := *(*reflect.SliceHeader)(unsafe.Pointer(&mem)) - header.Len /= 4 - header.Cap /= 4 - - return mem, *(*[]uint32)(unsafe.Pointer(&header)), nil -} - -// memoryMapAndGenerate tries to memory map a temporary file of uint32s for write -// access, fill it with the data from a generator and then move it into the final -// path requested. -func memoryMapAndGenerate(path string, size uint64, generator func(buffer []uint32)) (*os.File, mmap.MMap, []uint32, error) { - // Ensure the data folder exists - if err := os.MkdirAll(filepath.Dir(path), 0755); err != nil { - return nil, nil, nil, err - } - // Create a huge temporary empty file to fill with data - temp := path + "." + strconv.Itoa(rand.Int()) - - dump, err := os.Create(temp) - if err != nil { - return nil, nil, nil, err - } - if err = dump.Truncate(int64(len(dumpMagic))*4 + int64(size)); err != nil { - return nil, nil, nil, err - } - // Memory map the file for writing and fill it with the generator - mem, buffer, err := memoryMapFile(dump, true) - if err != nil { - dump.Close() - return nil, nil, nil, err - } - copy(buffer, dumpMagic) - - data := buffer[len(dumpMagic):] - generator(data) - - if err := mem.Flush(); err != nil { - mem.Unmap() - dump.Close() - return nil, nil, nil, err - } - os.Rename(temp, path) - return dump, mem, data, nil -} - -// cache wraps an ethash cache with some metadata to allow easier concurrent use. -type cache struct { - epoch uint64 // Epoch for which this cache is relevant - - dump *os.File // File descriptor of the memory mapped cache - mmap mmap.MMap // Memory map itself to unmap before releasing - - cache []uint32 // The actual cache data content (may be memory mapped) - used time.Time // Timestamp of the last use for smarter eviction - once sync.Once // Ensures the cache is generated only once - lock sync.Mutex // Ensures thread safety for updating the usage time -} - -// generate ensures that the cache content is generated before use. -func (c *cache) generate(dir string, limit int, test bool) { - c.once.Do(func() { - // If we have a testing cache, generate and return - if test { - c.cache = make([]uint32, 1024/4) - generateCache(c.cache, c.epoch, seedHash(c.epoch*epochLength+1)) - return - } - // If we don't store anything on disk, generate and return - size := cacheSize(c.epoch*epochLength + 1) - seed := seedHash(c.epoch*epochLength + 1) - - if dir == "" { - c.cache = make([]uint32, size/4) - generateCache(c.cache, c.epoch, seed) - return - } - // Disk storage is needed, this will get fancy - var endian string - if !isLittleEndian() { - endian = ".be" - } - path := filepath.Join(dir, fmt.Sprintf("cache-R%d-%x%s", algorithmRevision, seed[:8], endian)) - logger := log.New("epoch", c.epoch) - - // Try to load the file from disk and memory map it - var err error - c.dump, c.mmap, c.cache, err = memoryMap(path) - if err == nil { - logger.Debug("Loaded old ethash cache from disk") - return - } - logger.Debug("Failed to load old ethash cache", "err", err) - - // No previous cache available, create a new cache file to fill - c.dump, c.mmap, c.cache, err = memoryMapAndGenerate(path, size, func(buffer []uint32) { generateCache(buffer, c.epoch, seed) }) - if err != nil { - logger.Error("Failed to generate mapped ethash cache", "err", err) - - c.cache = make([]uint32, size/4) - generateCache(c.cache, c.epoch, seed) - } - // Iterate over all previous instances and delete old ones - for ep := int(c.epoch) - limit; ep >= 0; ep-- { - seed := seedHash(uint64(ep)*epochLength + 1) - path := filepath.Join(dir, fmt.Sprintf("cache-R%d-%x%s", algorithmRevision, seed[:8], endian)) - os.Remove(path) - } - }) -} - -// release closes any file handlers and memory maps open. -func (c *cache) release() { - if c.mmap != nil { - c.mmap.Unmap() - c.mmap = nil - } - if c.dump != nil { - c.dump.Close() - c.dump = nil - } -} - -// dataset wraps an ethash dataset with some metadata to allow easier concurrent use. -type dataset struct { - epoch uint64 // Epoch for which this cache is relevant - - dump *os.File // File descriptor of the memory mapped cache - mmap mmap.MMap // Memory map itself to unmap before releasing - - dataset []uint32 // The actual cache data content - used time.Time // Timestamp of the last use for smarter eviction - once sync.Once // Ensures the cache is generated only once - lock sync.Mutex // Ensures thread safety for updating the usage time -} - -// generate ensures that the dataset content is generated before use. -func (d *dataset) generate(dir string, limit int, test bool) { - d.once.Do(func() { - // If we have a testing dataset, generate and return - if test { - cache := make([]uint32, 1024/4) - generateCache(cache, d.epoch, seedHash(d.epoch*epochLength+1)) - - d.dataset = make([]uint32, 32*1024/4) - generateDataset(d.dataset, d.epoch, cache) - - return - } - // If we don't store anything on disk, generate and return - csize := cacheSize(d.epoch*epochLength + 1) - dsize := datasetSize(d.epoch*epochLength + 1) - seed := seedHash(d.epoch*epochLength + 1) - - if dir == "" { - cache := make([]uint32, csize/4) - generateCache(cache, d.epoch, seed) - - d.dataset = make([]uint32, dsize/4) - generateDataset(d.dataset, d.epoch, cache) - } - // Disk storage is needed, this will get fancy - var endian string - if !isLittleEndian() { - endian = ".be" - } - path := filepath.Join(dir, fmt.Sprintf("full-R%d-%x%s", algorithmRevision, seed[:8], endian)) - logger := log.New("epoch", d.epoch) - - // Try to load the file from disk and memory map it - var err error - d.dump, d.mmap, d.dataset, err = memoryMap(path) - if err == nil { - logger.Debug("Loaded old ethash dataset from disk") - return - } - logger.Debug("Failed to load old ethash dataset", "err", err) - - // No previous dataset available, create a new dataset file to fill - cache := make([]uint32, csize/4) - generateCache(cache, d.epoch, seed) - - d.dump, d.mmap, d.dataset, err = memoryMapAndGenerate(path, dsize, func(buffer []uint32) { generateDataset(buffer, d.epoch, cache) }) - if err != nil { - logger.Error("Failed to generate mapped ethash dataset", "err", err) - - d.dataset = make([]uint32, dsize/2) - generateDataset(d.dataset, d.epoch, cache) - } - // Iterate over all previous instances and delete old ones - for ep := int(d.epoch) - limit; ep >= 0; ep-- { - seed := seedHash(uint64(ep)*epochLength + 1) - path := filepath.Join(dir, fmt.Sprintf("full-R%d-%x%s", algorithmRevision, seed[:8], endian)) - os.Remove(path) - } - }) -} - -// release closes any file handlers and memory maps open. -func (d *dataset) release() { - if d.mmap != nil { - d.mmap.Unmap() - d.mmap = nil - } - if d.dump != nil { - d.dump.Close() - d.dump = nil - } -} - -// MakeCache generates a new ethash cache and optionally stores it to disk. -func MakeCache(block uint64, dir string) { - c := cache{epoch: block/epochLength + 1} - c.generate(dir, math.MaxInt32, false) - c.release() -} - -// MakeDataset generates a new ethash dataset and optionally stores it to disk. -func MakeDataset(block uint64, dir string) { - d := dataset{epoch: block/epochLength + 1} - d.generate(dir, math.MaxInt32, false) - d.release() -} - -// Ethash is a PoW data struture implementing the ethash algorithm. -type Ethash struct { - cachedir string // Data directory to store the verification caches - cachesinmem int // Number of caches to keep in memory - cachesondisk int // Number of caches to keep on disk - dagdir string // Data directory to store full mining datasets - dagsinmem int // Number of mining datasets to keep in memory - dagsondisk int // Number of mining datasets to keep on disk - - caches map[uint64]*cache // In memory caches to avoid regenerating too often - fcache *cache // Pre-generated cache for the estimated future epoch - datasets map[uint64]*dataset // In memory datasets to avoid regenerating too often - fdataset *dataset // Pre-generated dataset for the estimated future epoch - lock sync.Mutex // Ensures thread safety for the in-memory caches - - hashrate metrics.Meter // Meter tracking the average hashrate - - tester bool // Flag whether to use a smaller test dataset -} - -// NewFullEthash creates a full sized ethash PoW scheme. -func NewFullEthash(cachedir string, cachesinmem, cachesondisk int, dagdir string, dagsinmem, dagsondisk int) PoW { - if cachesinmem <= 0 { - log.Warn("One ethash cache must alwast be in memory", "requested", cachesinmem) - cachesinmem = 1 - } - if cachedir != "" && cachesondisk > 0 { - log.Info("Disk storage enabled for ethash caches", "dir", cachedir, "count", cachesondisk) - } - if dagdir != "" && dagsondisk > 0 { - log.Info("Disk storage enabled for ethash DAGs", "dir", dagdir, "count", dagsondisk) - } - return &Ethash{ - cachedir: cachedir, - cachesinmem: cachesinmem, - cachesondisk: cachesondisk, - dagdir: dagdir, - dagsinmem: dagsinmem, - dagsondisk: dagsondisk, - caches: make(map[uint64]*cache), - datasets: make(map[uint64]*dataset), - hashrate: metrics.NewMeter(), - } -} - -// NewTestEthash creates a small sized ethash PoW scheme useful only for testing -// purposes. -func NewTestEthash() PoW { - return &Ethash{ - cachesinmem: 1, - caches: make(map[uint64]*cache), - datasets: make(map[uint64]*dataset), - tester: true, - hashrate: metrics.NewMeter(), - } -} - -// NewSharedEthash creates a full sized ethash PoW shared between all requesters -// running in the same process. -func NewSharedEthash() PoW { - return sharedEthash -} - -// Verify implements PoW, checking whether the given block satisfies the PoW -// difficulty requirements. -func (ethash *Ethash) Verify(block Block) error { - // Sanity check that the block number is below the lookup table size (60M blocks) - number := block.NumberU64() - if number/epochLength >= uint64(len(cacheSizes)) { - // Go < 1.7 cannot calculate new cache/dataset sizes (no fast prime check) - return ErrNonceOutOfRange - } - // Ensure that we have a valid difficulty for the block - difficulty := block.Difficulty() - if difficulty.Sign() <= 0 { - return ErrInvalidDifficulty - } - // Recompute the digest and PoW value and verify against the block - cache := ethash.cache(number) - - size := datasetSize(number) - if ethash.tester { - size = 32 * 1024 - } - digest, result := hashimotoLight(size, cache, block.HashNoNonce().Bytes(), block.Nonce()) - if !bytes.Equal(block.MixDigest().Bytes(), digest) { - return ErrInvalidMixDigest - } - target := new(big.Int).Div(maxUint256, difficulty) - if new(big.Int).SetBytes(result).Cmp(target) > 0 { - return ErrInvalidPoW - } - return nil -} - -// cache tries to retrieve a verification cache for the specified block number -// by first checking against a list of in-memory caches, then against caches -// stored on disk, and finally generating one if none can be found. -func (ethash *Ethash) cache(block uint64) []uint32 { - epoch := block / epochLength - - // If we have a PoW for that epoch, use that - ethash.lock.Lock() - - current, future := ethash.caches[epoch], (*cache)(nil) - if current == nil { - // No in-memory cache, evict the oldest if the cache limit was reached - for len(ethash.caches) > 0 && len(ethash.caches) >= ethash.cachesinmem { - var evict *cache - for _, cache := range ethash.caches { - if evict == nil || evict.used.After(cache.used) { - evict = cache - } - } - delete(ethash.caches, evict.epoch) - evict.release() - - log.Trace("Evicted ethash cache", "epoch", evict.epoch, "used", evict.used) - } - // If we have the new cache pre-generated, use that, otherwise create a new one - if ethash.fcache != nil && ethash.fcache.epoch == epoch { - log.Trace("Using pre-generated cache", "epoch", epoch) - current, ethash.fcache = ethash.fcache, nil - } else { - log.Trace("Requiring new ethash cache", "epoch", epoch) - current = &cache{epoch: epoch} - } - ethash.caches[epoch] = current - - // If we just used up the future cache, or need a refresh, regenerate - if ethash.fcache == nil || ethash.fcache.epoch <= epoch { - if ethash.fcache != nil { - ethash.fcache.release() - } - log.Trace("Requiring new future ethash cache", "epoch", epoch+1) - future = &cache{epoch: epoch + 1} - ethash.fcache = future - } - } - current.used = time.Now() - ethash.lock.Unlock() - - // Wait for generation finish, bump the timestamp and finalize the cache - current.generate(ethash.cachedir, ethash.cachesondisk, ethash.tester) - - current.lock.Lock() - current.used = time.Now() - current.lock.Unlock() - - // If we exhausted the future cache, now's a good time to regenerate it - if future != nil { - go future.generate(ethash.cachedir, ethash.cachesondisk, ethash.tester) - } - return current.cache -} - -// Search implements PoW, attempting to find a nonce that satisfies the block's -// difficulty requirements. -func (ethash *Ethash) Search(block Block, stop <-chan struct{}) (uint64, []byte) { - var ( - hash = block.HashNoNonce().Bytes() - diff = block.Difficulty() - target = new(big.Int).Div(maxUint256, diff) - dataset = ethash.dataset(block.NumberU64()) - rand = rand.New(rand.NewSource(time.Now().UnixNano())) - nonce = uint64(rand.Int63()) - attempts int64 - ) - // Start generating random nonces until we abort or find a good one - for { - select { - case <-stop: - // Mining terminated, update stats and abort - ethash.hashrate.Mark(attempts) - return 0, nil - - default: - // We don't have to update hash rate on every nonce, so update after after 2^X nonces - attempts++ - if (attempts % (1 << 15)) == 0 { - ethash.hashrate.Mark(attempts) - attempts = 0 - } - // Compute the PoW value of this nonce - digest, result := hashimotoFull(dataset, hash, nonce) - if new(big.Int).SetBytes(result).Cmp(target) <= 0 { - return nonce, digest - } - nonce++ - } - } -} - -// dataset tries to retrieve a mining dataset for the specified block number -// by first checking against a list of in-memory datasets, then against DAGs -// stored on disk, and finally generating one if none can be found. -func (ethash *Ethash) dataset(block uint64) []uint32 { - epoch := block / epochLength - - // If we have a PoW for that epoch, use that - ethash.lock.Lock() - - current, future := ethash.datasets[epoch], (*dataset)(nil) - if current == nil { - // No in-memory dataset, evict the oldest if the dataset limit was reached - for len(ethash.datasets) > 0 && len(ethash.datasets) >= ethash.dagsinmem { - var evict *dataset - for _, dataset := range ethash.datasets { - if evict == nil || evict.used.After(dataset.used) { - evict = dataset - } - } - delete(ethash.datasets, evict.epoch) - evict.release() - - log.Trace("Evicted ethash dataset", "epoch", evict.epoch, "used", evict.used) - } - // If we have the new cache pre-generated, use that, otherwise create a new one - if ethash.fdataset != nil && ethash.fdataset.epoch == epoch { - log.Trace("Using pre-generated dataset", "epoch", epoch) - current = &dataset{epoch: ethash.fdataset.epoch} // Reload from disk - ethash.fdataset = nil - } else { - log.Trace("Requiring new ethash dataset", "epoch", epoch) - current = &dataset{epoch: epoch} - } - ethash.datasets[epoch] = current - - // If we just used up the future dataset, or need a refresh, regenerate - if ethash.fdataset == nil || ethash.fdataset.epoch <= epoch { - if ethash.fdataset != nil { - ethash.fdataset.release() - } - log.Trace("Requiring new future ethash dataset", "epoch", epoch+1) - future = &dataset{epoch: epoch + 1} - ethash.fdataset = future - } - } - current.used = time.Now() - ethash.lock.Unlock() - - // Wait for generation finish, bump the timestamp and finalize the cache - current.generate(ethash.dagdir, ethash.dagsondisk, ethash.tester) - - current.lock.Lock() - current.used = time.Now() - current.lock.Unlock() - - // If we exhausted the future dataset, now's a good time to regenerate it - if future != nil { - go future.generate(ethash.dagdir, ethash.dagsondisk, ethash.tester) - } - return current.dataset -} - -// Hashrate implements PoW, returning the measured rate of the search invocations -// per second over the last minute. -func (ethash *Ethash) Hashrate() float64 { - return ethash.hashrate.Rate1() -} - -// EthashSeedHash is the seed to use for generating a vrification cache and the -// mining dataset. -func EthashSeedHash(block uint64) []byte { - return seedHash(block) -} diff --git a/pow/ethash_algo.go b/pow/ethash_algo.go deleted file mode 100644 index 1e996785f..000000000 --- a/pow/ethash_algo.go +++ /dev/null @@ -1,1103 +0,0 @@ -// Copyright 2017 The go-ethereum Authors -// This file is part of the go-ethereum library. -// -// The go-ethereum library is free software: you can redistribute it and/or modify -// it under the terms of the GNU Lesser General Public License as published by -// the Free Software Foundation, either version 3 of the License, or -// (at your option) any later version. -// -// The go-ethereum library is distributed in the hope that it will be useful, -// but WITHOUT ANY WARRANTY; without even the implied warranty of -// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the -// GNU Lesser General Public License for more details. -// -// You should have received a copy of the GNU Lesser General Public License -// along with the go-ethereum library. If not, see <http://www.gnu.org/licenses/>. - -package pow - -import ( - "encoding/binary" - "hash" - "reflect" - "runtime" - "sync" - "sync/atomic" - "time" - "unsafe" - - "github.com/ethereum/go-ethereum/common" - "github.com/ethereum/go-ethereum/crypto" - "github.com/ethereum/go-ethereum/crypto/sha3" - "github.com/ethereum/go-ethereum/log" -) - -const ( - datasetInitBytes = 1 << 30 // Bytes in dataset at genesis - datasetGrowthBytes = 1 << 23 // Dataset growth per epoch - cacheInitBytes = 1 << 24 // Bytes in cache at genesis - cacheGrowthBytes = 1 << 17 // Cache growth per epoch - epochLength = 30000 // Blocks per epoch - mixBytes = 128 // Width of mix - hashBytes = 64 // Hash length in bytes - hashWords = 16 // Number of 32 bit ints in a hash - datasetParents = 256 // Number of parents of each dataset element - cacheRounds = 3 // Number of rounds in cache production - loopAccesses = 64 // Number of accesses in hashimoto loop -) - -// hasher is a repetitive hasher allowing the same hash data structures to be -// reused between hash runs instead of requiring new ones to be created. -type hasher func(dest []byte, data []byte) - -// makeHasher creates a repetitive hasher, allowing the same hash data structures -// to be reused between hash runs instead of requiring new ones to be created. -// -// The returned function is not thread safe! -func makeHasher(h hash.Hash) hasher { - return func(dest []byte, data []byte) { - h.Write(data) - h.Sum(dest[:0]) - h.Reset() - } -} - -// seedHash is the seed to use for generating a verification cache and the mining -// dataset. -func seedHash(block uint64) []byte { - seed := make([]byte, 32) - if block < epochLength { - return seed - } - keccak256 := makeHasher(sha3.NewKeccak256()) - for i := 0; i < int(block/epochLength); i++ { - keccak256(seed, seed) - } - return seed -} - -// generateCache creates a verification cache of a given size for an input seed. -// The cache production process involves first sequentially filling up 32 MB of -// memory, then performing two passes of Sergio Demian Lerner's RandMemoHash -// algorithm from Strict Memory Hard Hashing Functions (2014). The output is a -// set of 524288 64-byte values. -// -// This method places the result into dest in machine byte order. -func generateCache(dest []uint32, epoch uint64, seed []byte) { - // Print some debug logs to allow analysis on low end devices - logger := log.New("epoch", epoch) - - start := time.Now() - defer func() { - elapsed := time.Since(start) - - logFn := logger.Debug - if elapsed > 3*time.Second { - logFn = logger.Info - } - logFn("Generated ethash verification cache", "elapsed", common.PrettyDuration(elapsed)) - }() - // Convert our destination slice to a byte buffer - header := *(*reflect.SliceHeader)(unsafe.Pointer(&dest)) - header.Len *= 4 - header.Cap *= 4 - cache := *(*[]byte)(unsafe.Pointer(&header)) - - // Calculate the number of thoretical rows (we'll store in one buffer nonetheless) - size := uint64(len(cache)) - rows := int(size) / hashBytes - - // Start a monitoring goroutine to report progress on low end devices - var progress uint32 - - done := make(chan struct{}) - defer close(done) - - go func() { - for { - select { - case <-done: - return - case <-time.After(3 * time.Second): - logger.Info("Generating ethash verification cache", "percentage", atomic.LoadUint32(&progress)*100/uint32(rows)/4, "elapsed", common.PrettyDuration(time.Since(start))) - } - } - }() - // Create a hasher to reuse between invocations - keccak512 := makeHasher(sha3.NewKeccak512()) - - // Sequentially produce the initial dataset - keccak512(cache, seed) - for offset := uint64(hashBytes); offset < size; offset += hashBytes { - keccak512(cache[offset:], cache[offset-hashBytes:offset]) - atomic.AddUint32(&progress, 1) - } - // Use a low-round version of randmemohash - temp := make([]byte, hashBytes) - - for i := 0; i < cacheRounds; i++ { - for j := 0; j < rows; j++ { - var ( - srcOff = ((j - 1 + rows) % rows) * hashBytes - dstOff = j * hashBytes - xorOff = (binary.LittleEndian.Uint32(cache[dstOff:]) % uint32(rows)) * hashBytes - ) - xorBytes(temp, cache[srcOff:srcOff+hashBytes], cache[xorOff:xorOff+hashBytes]) - keccak512(cache[dstOff:], temp) - - atomic.AddUint32(&progress, 1) - } - } - // Swap the byte order on big endian systems and return - if !isLittleEndian() { - swap(cache) - } -} - -// swap changes the byte order of the buffer assuming a uint32 representation. -func swap(buffer []byte) { - for i := 0; i < len(buffer); i += 4 { - binary.BigEndian.PutUint32(buffer[i:], binary.LittleEndian.Uint32(buffer[i:])) - } -} - -// prepare converts an ethash cache or dataset from a byte stream into the internal -// int representation. All ethash methods work with ints to avoid constant byte to -// int conversions as well as to handle both little and big endian systems. -func prepare(dest []uint32, src []byte) { - for i := 0; i < len(dest); i++ { - dest[i] = binary.LittleEndian.Uint32(src[i*4:]) - } -} - -// fnv is an algorithm inspired by the FNV hash, which in some cases is used as -// a non-associative substitute for XOR. Note that we multiply the prime with -// the full 32-bit input, in contrast with the FNV-1 spec which multiplies the -// prime with one byte (octet) in turn. -func fnv(a, b uint32) uint32 { - return a*0x01000193 ^ b -} - -// fnvHash mixes in data into mix using the ethash fnv method. -func fnvHash(mix []uint32, data []uint32) { - for i := 0; i < len(mix); i++ { - mix[i] = mix[i]*0x01000193 ^ data[i] - } -} - -// generateDatasetItem combines data from 256 pseudorandomly selected cache nodes, -// and hashes that to compute a single dataset node. -func generateDatasetItem(cache []uint32, index uint32, keccak512 hasher) []byte { - // Calculate the number of thoretical rows (we use one buffer nonetheless) - rows := uint32(len(cache) / hashWords) - - // Initialize the mix - mix := make([]byte, hashBytes) - - binary.LittleEndian.PutUint32(mix, cache[(index%rows)*hashWords]^index) - for i := 1; i < hashWords; i++ { - binary.LittleEndian.PutUint32(mix[i*4:], cache[(index%rows)*hashWords+uint32(i)]) - } - keccak512(mix, mix) - - // Convert the mix to uint32s to avoid constant bit shifting - intMix := make([]uint32, hashWords) - for i := 0; i < len(intMix); i++ { - intMix[i] = binary.LittleEndian.Uint32(mix[i*4:]) - } - // fnv it with a lot of random cache nodes based on index - for i := uint32(0); i < datasetParents; i++ { - parent := fnv(index^i, intMix[i%16]) % rows - fnvHash(intMix, cache[parent*hashWords:]) - } - // Flatten the uint32 mix into a binary one and return - for i, val := range intMix { - binary.LittleEndian.PutUint32(mix[i*4:], val) - } - keccak512(mix, mix) - return mix -} - -// generateDataset generates the entire ethash dataset for mining. -// -// This method places the result into dest in machine byte order. -func generateDataset(dest []uint32, epoch uint64, cache []uint32) { - // Print some debug logs to allow analysis on low end devices - logger := log.New("epoch", epoch) - - start := time.Now() - defer func() { - elapsed := time.Since(start) - - logFn := logger.Debug - if elapsed > 3*time.Second { - logFn = logger.Info - } - logFn("Generated ethash verification cache", "elapsed", common.PrettyDuration(elapsed)) - }() - - // Figure out whether the bytes need to be swapped for the machine - swapped := !isLittleEndian() - - // Convert our destination slice to a byte buffer - header := *(*reflect.SliceHeader)(unsafe.Pointer(&dest)) - header.Len *= 4 - header.Cap *= 4 - dataset := *(*[]byte)(unsafe.Pointer(&header)) - - // Generate the dataset on many goroutines since it takes a while - threads := runtime.NumCPU() - size := uint64(len(dataset)) - - var pend sync.WaitGroup - pend.Add(threads) - - var progress uint32 - for i := 0; i < threads; i++ { - go func(id int) { - defer pend.Done() - - // Create a hasher to reuse between invocations - keccak512 := makeHasher(sha3.NewKeccak512()) - - // Calculate the data segment this thread should generate - batch := uint32((size + hashBytes*uint64(threads) - 1) / (hashBytes * uint64(threads))) - first := uint32(id) * batch - limit := first + batch - if limit > uint32(size/hashBytes) { - limit = uint32(size / hashBytes) - } - // Calculate the dataset segment - percent := uint32(size / hashBytes / 100) - for index := first; index < limit; index++ { - item := generateDatasetItem(cache, index, keccak512) - if swapped { - swap(item) - } - copy(dataset[index*hashBytes:], item) - - if status := atomic.AddUint32(&progress, 1); status%percent == 0 { - logger.Info("Generating DAG in progress", "percentage", uint64(status*100)/(size/hashBytes), "elapsed", common.PrettyDuration(time.Since(start))) - } - } - }(i) - } - // Wait for all the generators to finish and return - pend.Wait() -} - -// hashimoto aggregates data from the full dataset in order to produce our final -// value for a particular header hash and nonce. -func hashimoto(hash []byte, nonce uint64, size uint64, lookup func(index uint32) []uint32) ([]byte, []byte) { - // Calculate the number of thoretical rows (we use one buffer nonetheless) - rows := uint32(size / mixBytes) - - // Combine header+nonce into a 64 byte seed - seed := make([]byte, 40) - copy(seed, hash) - binary.LittleEndian.PutUint64(seed[32:], nonce) - - seed = crypto.Keccak512(seed) - seedHead := binary.LittleEndian.Uint32(seed) - - // Start the mix with replicated seed - mix := make([]uint32, mixBytes/4) - for i := 0; i < len(mix); i++ { - mix[i] = binary.LittleEndian.Uint32(seed[i%16*4:]) - } - // Mix in random dataset nodes - temp := make([]uint32, len(mix)) - - for i := 0; i < loopAccesses; i++ { - parent := fnv(uint32(i)^seedHead, mix[i%len(mix)]) % rows - for j := uint32(0); j < mixBytes/hashBytes; j++ { - copy(temp[j*hashWords:], lookup(2*parent+j)) - } - fnvHash(mix, temp) - } - // Compress mix - for i := 0; i < len(mix); i += 4 { - mix[i/4] = fnv(fnv(fnv(mix[i], mix[i+1]), mix[i+2]), mix[i+3]) - } - mix = mix[:len(mix)/4] - - digest := make([]byte, common.HashLength) - for i, val := range mix { - binary.LittleEndian.PutUint32(digest[i*4:], val) - } - return digest, crypto.Keccak256(append(seed, digest...)) -} - -// hashimotoLight aggregates data from the full dataset (using only a small -// in-memory cache) in order to produce our final value for a particular header -// hash and nonce. -func hashimotoLight(size uint64, cache []uint32, hash []byte, nonce uint64) ([]byte, []byte) { - keccak512 := makeHasher(sha3.NewKeccak512()) - - lookup := func(index uint32) []uint32 { - rawData := generateDatasetItem(cache, index, keccak512) - - data := make([]uint32, len(rawData)/4) - for i := 0; i < len(data); i++ { - data[i] = binary.LittleEndian.Uint32(rawData[i*4:]) - } - return data - } - return hashimoto(hash, nonce, size, lookup) -} - -// hashimotoFull aggregates data from the full dataset (using the full in-memory -// dataset) in order to produce our final value for a particular header hash and -// nonce. -func hashimotoFull(dataset []uint32, hash []byte, nonce uint64) ([]byte, []byte) { - lookup := func(index uint32) []uint32 { - offset := index * hashWords - return dataset[offset : offset+hashWords] - } - return hashimoto(hash, nonce, uint64(len(dataset))*4, lookup) -} - -// datasetSizes is a lookup table for the ethash dataset size for the first 2048 -// epochs (i.e. 61440000 blocks). -var datasetSizes = []uint64{ - 1073739904, 1082130304, 1090514816, 1098906752, 1107293056, - 1115684224, 1124070016, 1132461952, 1140849536, 1149232768, - 1157627776, 1166013824, 1174404736, 1182786944, 1191180416, - 1199568512, 1207958912, 1216345216, 1224732032, 1233124736, - 1241513344, 1249902464, 1258290304, 1266673792, 1275067264, - 1283453312, 1291844992, 1300234112, 1308619904, 1317010048, - 1325397376, 1333787776, 1342176128, 1350561664, 1358954368, - 1367339392, 1375731584, 1384118144, 1392507008, 1400897408, - 1409284736, 1417673344, 1426062464, 1434451072, 1442839168, - 1451229056, 1459615616, 1468006016, 1476394112, 1484782976, - 1493171584, 1501559168, 1509948032, 1518337664, 1526726528, - 1535114624, 1543503488, 1551892096, 1560278656, 1568669056, - 1577056384, 1585446272, 1593831296, 1602219392, 1610610304, - 1619000192, 1627386752, 1635773824, 1644164224, 1652555648, - 1660943488, 1669332608, 1677721216, 1686109312, 1694497664, - 1702886272, 1711274624, 1719661184, 1728047744, 1736434816, - 1744829056, 1753218944, 1761606272, 1769995904, 1778382464, - 1786772864, 1795157888, 1803550592, 1811937664, 1820327552, - 1828711552, 1837102976, 1845488768, 1853879936, 1862269312, - 1870656896, 1879048064, 1887431552, 1895825024, 1904212096, - 1912601216, 1920988544, 1929379456, 1937765504, 1946156672, - 1954543232, 1962932096, 1971321728, 1979707264, 1988093056, - 1996487552, 2004874624, 2013262208, 2021653888, 2030039936, - 2038430848, 2046819968, 2055208576, 2063596672, 2071981952, - 2080373632, 2088762752, 2097149056, 2105539712, 2113928576, - 2122315136, 2130700672, 2139092608, 2147483264, 2155872128, - 2164257664, 2172642176, 2181035392, 2189426048, 2197814912, - 2206203008, 2214587264, 2222979712, 2231367808, 2239758208, - 2248145024, 2256527744, 2264922752, 2273312128, 2281701248, - 2290086272, 2298476672, 2306867072, 2315251072, 2323639168, - 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17054039936, 17062426496, 17070814336, 17079205504, 17087592064, - 17095978112, 17104369024, 17112759424, 17121147776, 17129536384, - 17137926016, 17146314368, 17154700928, 17163089792, 17171480192, - 17179864192, 17188256896, 17196644992, 17205033856, 17213423488, - 17221811072, 17230198912, 17238588032, 17246976896, 17255360384, - 17263754624, 17272143232, 17280530048, 17288918912, 17297309312, - 17305696384, 17314085504, 17322475136, 17330863744, 17339252096, - 17347640192, 17356026496, 17364413824, 17372796544, 17381190016, - 17389583488, 17397972608, 17406360704, 17414748544, 17423135872, - 17431527296, 17439915904, 17448303232, 17456691584, 17465081728, - 17473468288, 17481857408, 17490247552, 17498635904, 17507022464, - 17515409024, 17523801728, 17532189824, 17540577664, 17548966016, - 17557353344, 17565741184, 17574131584, 17582519168, 17590907008, - 17599296128, 17607687808, 17616076672, 17624455808, 17632852352, - 17641238656, 17649630848, 17658018944, 17666403968, 17674794112, - 17683178368, 17691573376, 17699962496, 17708350592, 17716739968, - 17725126528, 17733517184, 17741898112, 17750293888, 17758673024, - 17767070336, 17775458432, 17783848832, 17792236928, 17800625536, - 17809012352, 17817402752, 17825785984, 17834178944, 17842563968, - 17850955648, 17859344512, 17867732864, 17876119424, 17884511872, - 17892900224, 17901287296, 17909677696, 17918058112, 17926451072, - 17934843776, 17943230848, 17951609216, 17960008576, 17968397696, - 17976784256, 17985175424, 17993564032, 18001952128, 18010339712, - 18018728576, 18027116672, 18035503232, 18043894144, 18052283264, - 18060672128, 18069056384, 18077449856, 18085837184, 18094225792, - 18102613376, 18111004544, 18119388544, 18127781248, 18136170368, - 18144558976, 18152947328, 18161336192, 18169724288, 18178108544, - 18186498944, 18194886784, 18203275648, 18211666048, 18220048768, - 18228444544, 18236833408, 18245220736} - -// cacheSizes is a lookup table for the ethash verification cache size for the -// first 2048 epochs (i.e. 61440000 blocks). -var cacheSizes = []uint64{ - 16776896, 16907456, 17039296, 17170112, 17301056, 17432512, 17563072, - 17693888, 17824192, 17955904, 18087488, 18218176, 18349504, 18481088, - 18611392, 18742336, 18874304, 19004224, 19135936, 19267264, 19398208, - 19529408, 19660096, 19791424, 19922752, 20053952, 20184896, 20315968, - 20446912, 20576576, 20709184, 20840384, 20971072, 21102272, 21233216, - 21364544, 21494848, 21626816, 21757376, 21887552, 22019392, 22151104, - 22281536, 22412224, 22543936, 22675264, 22806464, 22935872, 23068096, - 23198272, 23330752, 23459008, 23592512, 23723968, 23854912, 23986112, - 24116672, 24247616, 24378688, 24509504, 24640832, 24772544, 24903488, - 25034432, 25165376, 25296704, 25427392, 25558592, 25690048, 25820096, - 25951936, 26081728, 26214208, 26345024, 26476096, 26606656, 26737472, - 26869184, 26998208, 27131584, 27262528, 27393728, 27523904, 27655744, - 27786688, 27917888, 28049344, 28179904, 28311488, 28441792, 28573504, - 28700864, 28835648, 28966208, 29096768, 29228608, 29359808, 29490752, - 29621824, 29752256, 29882816, 30014912, 30144448, 30273728, 30406976, - 30538432, 30670784, 30799936, 30932672, 31063744, 31195072, 31325248, - 31456192, 31588288, 31719232, 31850432, 31981504, 32110784, 32243392, - 32372672, 32505664, 32636608, 32767808, 32897344, 33029824, 33160768, - 33289664, 33423296, 33554368, 33683648, 33816512, 33947456, 34076992, - 34208704, 34340032, 34471744, 34600256, 34734016, 34864576, 34993984, - 35127104, 35258176, 35386688, 35518528, 35650624, 35782336, 35910976, - 36044608, 36175808, 36305728, 36436672, 36568384, 36699968, 36830656, - 36961984, 37093312, 37223488, 37355072, 37486528, 37617472, 37747904, - 37879232, 38009792, 38141888, 38272448, 38403392, 38535104, 38660672, - 38795584, 38925632, 39059264, 39190336, 39320768, 39452096, 39581632, - 39713984, 39844928, 39974848, 40107968, 40238144, 40367168, 40500032, - 40631744, 40762816, 40894144, 41023552, 41155904, 41286208, 41418304, - 41547712, 41680448, 41811904, 41942848, 42073792, 42204992, 42334912, - 42467008, 42597824, 42729152, 42860096, 42991552, 43122368, 43253696, - 43382848, 43515712, 43646912, 43777088, 43907648, 44039104, 44170432, - 44302144, 44433344, 44564288, 44694976, 44825152, 44956864, 45088448, - 45219008, 45350464, 45481024, 45612608, 45744064, 45874496, 46006208, - 46136768, 46267712, 46399424, 46529344, 46660672, 46791488, 46923328, - 47053504, 47185856, 47316928, 47447872, 47579072, 47710144, 47839936, - 47971648, 48103232, 48234176, 48365248, 48496192, 48627136, 48757312, - 48889664, 49020736, 49149248, 49283008, 49413824, 49545152, 49675712, - 49807168, 49938368, 50069056, 50200256, 50331584, 50462656, 50593472, - 50724032, 50853952, 50986048, 51117632, 51248576, 51379904, 51510848, - 51641792, 51773248, 51903296, 52035136, 52164032, 52297664, 52427968, - 52557376, 52690112, 52821952, 52952896, 53081536, 53213504, 53344576, - 53475776, 53608384, 53738816, 53870528, 54000832, 54131776, 54263744, - 54394688, 54525248, 54655936, 54787904, 54918592, 55049152, 55181248, - 55312064, 55442752, 55574336, 55705024, 55836224, 55967168, 56097856, - 56228672, 56358592, 56490176, 56621888, 56753728, 56884928, 57015488, - 57146816, 57278272, 57409216, 57540416, 57671104, 57802432, 57933632, - 58064576, 58195264, 58326976, 58457408, 58588864, 58720192, 58849984, - 58981696, 59113024, 59243456, 59375552, 59506624, 59637568, 59768512, - 59897792, 60030016, 60161984, 60293056, 60423872, 60554432, 60683968, - 60817216, 60948032, 61079488, 61209664, 61341376, 61471936, 61602752, - 61733696, 61865792, 61996736, 62127808, 62259136, 62389568, 62520512, - 62651584, 62781632, 62910784, 63045056, 63176128, 63307072, 63438656, - 63569216, 63700928, 63831616, 63960896, 64093888, 64225088, 64355392, - 64486976, 64617664, 64748608, 64879424, 65009216, 65142464, 65273792, - 65402816, 65535424, 65666752, 65797696, 65927744, 66060224, 66191296, - 66321344, 66453056, 66584384, 66715328, 66846656, 66977728, 67108672, - 67239104, 67370432, 67501888, 67631296, 67763776, 67895104, 68026304, - 68157248, 68287936, 68419264, 68548288, 68681408, 68811968, 68942912, - 69074624, 69205568, 69337024, 69467584, 69599168, 69729472, 69861184, - 69989824, 70122944, 70253888, 70385344, 70515904, 70647232, 70778816, - 70907968, 71040832, 71171648, 71303104, 71432512, 71564992, 71695168, - 71826368, 71958464, 72089536, 72219712, 72350144, 72482624, 72613568, - 72744512, 72875584, 73006144, 73138112, 73268672, 73400128, 73530944, - 73662272, 73793344, 73924544, 74055104, 74185792, 74316992, 74448832, - 74579392, 74710976, 74841664, 74972864, 75102784, 75233344, 75364544, - 75497024, 75627584, 75759296, 75890624, 76021696, 76152256, 76283072, - 76414144, 76545856, 76676672, 76806976, 76937792, 77070016, 77200832, - 77331392, 77462464, 77593664, 77725376, 77856448, 77987776, 78118336, - 78249664, 78380992, 78511424, 78642496, 78773056, 78905152, 79033664, - 79166656, 79297472, 79429568, 79560512, 79690816, 79822784, 79953472, - 80084672, 80214208, 80346944, 80477632, 80608576, 80740288, 80870848, - 81002048, 81133504, 81264448, 81395648, 81525952, 81657536, 81786304, - 81919808, 82050112, 82181312, 82311616, 82443968, 82573376, 82705984, - 82835776, 82967744, 83096768, 83230528, 83359552, 83491264, 83622464, - 83753536, 83886016, 84015296, 84147776, 84277184, 84409792, 84540608, - 84672064, 84803008, 84934336, 85065152, 85193792, 85326784, 85458496, - 85589312, 85721024, 85851968, 85982656, 86112448, 86244416, 86370112, - 86506688, 86637632, 86769344, 86900672, 87031744, 87162304, 87293632, - 87424576, 87555392, 87687104, 87816896, 87947968, 88079168, 88211264, - 88341824, 88473152, 88603712, 88735424, 88862912, 88996672, 89128384, - 89259712, 89390272, 89521984, 89652544, 89783872, 89914816, 90045376, - 90177088, 90307904, 90438848, 90569152, 90700096, 90832832, 90963776, - 91093696, 91223744, 91356992, 91486784, 91618496, 91749824, 91880384, - 92012224, 92143552, 92273344, 92405696, 92536768, 92666432, 92798912, - 92926016, 93060544, 93192128, 93322816, 93453632, 93583936, 93715136, - 93845056, 93977792, 94109504, 94240448, 94371776, 94501184, 94632896, - 94764224, 94895552, 95023424, 95158208, 95287744, 95420224, 95550016, - 95681216, 95811904, 95943872, 96075328, 96203584, 96337856, 96468544, - 96599744, 96731072, 96860992, 96992576, 97124288, 97254848, 97385536, - 97517248, 97647808, 97779392, 97910464, 98041408, 98172608, 98303168, - 98434496, 98565568, 98696768, 98827328, 98958784, 99089728, 99220928, - 99352384, 99482816, 99614272, 99745472, 99876416, 100007104, - 100138048, 100267072, 100401088, 100529984, 100662592, 100791872, - 100925248, 101056064, 101187392, 101317952, 101449408, 101580608, - 101711296, 101841728, 101973824, 102104896, 102235712, 102366016, - 102498112, 102628672, 102760384, 102890432, 103021888, 103153472, - 103284032, 103415744, 103545152, 103677248, 103808576, 103939648, - 104070976, 104201792, 104332736, 104462528, 104594752, 104725952, - 104854592, 104988608, 105118912, 105247808, 105381184, 105511232, - 105643072, 105774784, 105903296, 106037056, 106167872, 106298944, - 106429504, 106561472, 106691392, 106822592, 106954304, 107085376, - 107216576, 107346368, 107478464, 107609792, 107739712, 107872192, - 108003136, 108131392, 108265408, 108396224, 108527168, 108657344, - 108789568, 108920384, 109049792, 109182272, 109312576, 109444928, - 109572928, 109706944, 109837888, 109969088, 110099648, 110230976, - 110362432, 110492992, 110624704, 110755264, 110886208, 111017408, - 111148864, 111279296, 111410752, 111541952, 111673024, 111803456, - 111933632, 112066496, 112196416, 112328512, 112457792, 112590784, - 112715968, 112852672, 112983616, 113114944, 113244224, 113376448, - 113505472, 113639104, 113770304, 113901376, 114031552, 114163264, - 114294592, 114425536, 114556864, 114687424, 114818624, 114948544, - 115080512, 115212224, 115343296, 115473472, 115605184, 115736128, - 115867072, 115997248, 116128576, 116260288, 116391488, 116522944, - 116652992, 116784704, 116915648, 117046208, 117178304, 117308608, - 117440192, 117569728, 117701824, 117833024, 117964096, 118094656, - 118225984, 118357312, 118489024, 118617536, 118749632, 118882112, - 119012416, 119144384, 119275328, 119406016, 119537344, 119668672, - 119798464, 119928896, 120061376, 120192832, 120321728, 120454336, - 120584512, 120716608, 120848192, 120979136, 121109056, 121241408, - 121372352, 121502912, 121634752, 121764416, 121895744, 122027072, - 122157632, 122289088, 122421184, 122550592, 122682944, 122813888, - 122945344, 123075776, 123207488, 123338048, 123468736, 123600704, - 123731264, 123861952, 123993664, 124124608, 124256192, 124386368, - 124518208, 124649024, 124778048, 124911296, 125041088, 125173696, - 125303744, 125432896, 125566912, 125696576, 125829056, 125958592, - 126090304, 126221248, 126352832, 126483776, 126615232, 126746432, - 126876608, 127008704, 127139392, 127270336, 127401152, 127532224, - 127663552, 127794752, 127925696, 128055232, 128188096, 128319424, - 128449856, 128581312, 128712256, 128843584, 128973632, 129103808, - 129236288, 129365696, 129498944, 129629888, 129760832, 129892288, - 130023104, 130154048, 130283968, 130416448, 130547008, 130678336, - 130807616, 130939456, 131071552, 131202112, 131331776, 131464384, - 131594048, 131727296, 131858368, 131987392, 132120256, 132250816, - 132382528, 132513728, 132644672, 132774976, 132905792, 133038016, - 133168832, 133299392, 133429312, 133562048, 133692992, 133823296, - 133954624, 134086336, 134217152, 134348608, 134479808, 134607296, - 134741056, 134872384, 135002944, 135134144, 135265472, 135396544, - 135527872, 135659072, 135787712, 135921472, 136052416, 136182848, - 136313792, 136444864, 136576448, 136707904, 136837952, 136970048, - 137099584, 137232064, 137363392, 137494208, 137625536, 137755712, - 137887424, 138018368, 138149824, 138280256, 138411584, 138539584, - 138672832, 138804928, 138936128, 139066688, 139196864, 139328704, - 139460032, 139590208, 139721024, 139852864, 139984576, 140115776, - 140245696, 140376512, 140508352, 140640064, 140769856, 140902336, - 141032768, 141162688, 141294016, 141426496, 141556544, 141687488, - 141819584, 141949888, 142080448, 142212544, 142342336, 142474432, - 142606144, 142736192, 142868288, 142997824, 143129408, 143258944, - 143392448, 143523136, 143653696, 143785024, 143916992, 144045632, - 144177856, 144309184, 144440768, 144570688, 144701888, 144832448, - 144965056, 145096384, 145227584, 145358656, 145489856, 145620928, - 145751488, 145883072, 146011456, 146144704, 146275264, 146407232, - 146538176, 146668736, 146800448, 146931392, 147062336, 147193664, - 147324224, 147455936, 147586624, 147717056, 147848768, 147979456, - 148110784, 148242368, 148373312, 148503232, 148635584, 148766144, - 148897088, 149028416, 149159488, 149290688, 149420224, 149551552, - 149683136, 149814976, 149943616, 150076352, 150208064, 150338624, - 150470464, 150600256, 150732224, 150862784, 150993088, 151125952, - 151254976, 151388096, 151519168, 151649728, 151778752, 151911104, - 152042944, 152174144, 152304704, 152435648, 152567488, 152698816, - 152828992, 152960576, 153091648, 153222976, 153353792, 153484096, - 153616192, 153747008, 153878336, 154008256, 154139968, 154270912, - 154402624, 154533824, 154663616, 154795712, 154926272, 155057984, - 155188928, 155319872, 155450816, 155580608, 155712064, 155843392, - 155971136, 156106688, 156237376, 156367424, 156499264, 156630976, - 156761536, 156892352, 157024064, 157155008, 157284416, 157415872, - 157545536, 157677248, 157810496, 157938112, 158071744, 158203328, - 158334656, 158464832, 158596288, 158727616, 158858048, 158988992, - 159121216, 159252416, 159381568, 159513152, 159645632, 159776192, - 159906496, 160038464, 160169536, 160300352, 160430656, 160563008, - 160693952, 160822208, 160956352, 161086784, 161217344, 161349184, - 161480512, 161611456, 161742272, 161873216, 162002752, 162135872, - 162266432, 162397888, 162529216, 162660032, 162790976, 162922048, - 163052096, 163184576, 163314752, 163446592, 163577408, 163707968, - 163839296, 163969984, 164100928, 164233024, 164364224, 164494912, - 164625856, 164756672, 164887616, 165019072, 165150016, 165280064, - 165412672, 165543104, 165674944, 165805888, 165936832, 166067648, - 166198336, 166330048, 166461248, 166591552, 166722496, 166854208, - 166985408, 167116736, 167246656, 167378368, 167508416, 167641024, - 167771584, 167903168, 168034112, 168164032, 168295744, 168427456, - 168557632, 168688448, 168819136, 168951616, 169082176, 169213504, - 169344832, 169475648, 169605952, 169738048, 169866304, 169999552, - 170131264, 170262464, 170393536, 170524352, 170655424, 170782016, - 170917696, 171048896, 171179072, 171310784, 171439936, 171573184, - 171702976, 171835072, 171966272, 172097216, 172228288, 172359232, - 172489664, 172621376, 172747712, 172883264, 173014208, 173144512, - 173275072, 173407424, 173539136, 173669696, 173800768, 173931712, - 174063424, 174193472, 174325696, 174455744, 174586816, 174718912, - 174849728, 174977728, 175109696, 175242688, 175374272, 175504832, - 175636288, 175765696, 175898432, 176028992, 176159936, 176291264, - 176422592, 176552512, 176684864, 176815424, 176946496, 177076544, - 177209152, 177340096, 177470528, 177600704, 177731648, 177864256, - 177994816, 178126528, 178257472, 178387648, 178518464, 178650176, - 178781888, 178912064, 179044288, 179174848, 179305024, 179436736, - 179568448, 179698496, 179830208, 179960512, 180092608, 180223808, - 180354752, 180485696, 180617152, 180748096, 180877504, 181009984, - 181139264, 181272512, 181402688, 181532608, 181663168, 181795136, - 181926592, 182057536, 182190016, 182320192, 182451904, 182582336, - 182713792, 182843072, 182976064, 183107264, 183237056, 183368384, - 183494848, 183631424, 183762752, 183893824, 184024768, 184154816, - 184286656, 184417984, 184548928, 184680128, 184810816, 184941248, - 185072704, 185203904, 185335616, 185465408, 185596352, 185727296, - 185859904, 185989696, 186121664, 186252992, 186383552, 186514112, - 186645952, 186777152, 186907328, 187037504, 187170112, 187301824, - 187429184, 187562048, 187693504, 187825472, 187957184, 188087104, - 188218304, 188349376, 188481344, 188609728, 188743616, 188874304, - 189005248, 189136448, 189265088, 189396544, 189528128, 189660992, - 189791936, 189923264, 190054208, 190182848, 190315072, 190447424, - 190577984, 190709312, 190840768, 190971328, 191102656, 191233472, - 191364032, 191495872, 191626816, 191758016, 191888192, 192020288, - 192148928, 192282176, 192413504, 192542528, 192674752, 192805952, - 192937792, 193068608, 193198912, 193330496, 193462208, 193592384, - 193723456, 193854272, 193985984, 194116672, 194247232, 194379712, - 194508352, 194641856, 194772544, 194900672, 195035072, 195166016, - 195296704, 195428032, 195558592, 195690304, 195818176, 195952576, - 196083392, 196214336, 196345792, 196476736, 196607552, 196739008, - 196869952, 197000768, 197130688, 197262784, 197394368, 197523904, - 197656384, 197787584, 197916608, 198049472, 198180544, 198310208, - 198442432, 198573632, 198705088, 198834368, 198967232, 199097792, - 199228352, 199360192, 199491392, 199621696, 199751744, 199883968, - 200014016, 200146624, 200276672, 200408128, 200540096, 200671168, - 200801984, 200933312, 201062464, 201194944, 201326144, 201457472, - 201588544, 201719744, 201850816, 201981632, 202111552, 202244032, - 202374464, 202505152, 202636352, 202767808, 202898368, 203030336, - 203159872, 203292608, 203423296, 203553472, 203685824, 203816896, - 203947712, 204078272, 204208192, 204341056, 204472256, 204603328, - 204733888, 204864448, 204996544, 205125568, 205258304, 205388864, - 205517632, 205650112, 205782208, 205913536, 206044736, 206176192, - 206307008, 206434496, 206569024, 206700224, 206831168, 206961856, - 207093056, 207223616, 207355328, 207486784, 207616832, 207749056, - 207879104, 208010048, 208141888, 208273216, 208404032, 208534336, - 208666048, 208796864, 208927424, 209059264, 209189824, 209321792, - 209451584, 209582656, 209715136, 209845568, 209976896, 210106432, - 210239296, 210370112, 210501568, 210630976, 210763712, 210894272, - 211024832, 211156672, 211287616, 211418176, 211549376, 211679296, - 211812032, 211942592, 212074432, 212204864, 212334016, 212467648, - 212597824, 212727616, 212860352, 212991424, 213120832, 213253952, - 213385024, 213515584, 213645632, 213777728, 213909184, 214040128, - 214170688, 214302656, 214433728, 214564544, 214695232, 214826048, - 214956992, 215089088, 215219776, 215350592, 215482304, 215613248, - 215743552, 215874752, 216005312, 216137024, 216267328, 216399296, - 216530752, 216661696, 216790592, 216923968, 217054528, 217183168, - 217316672, 217448128, 217579072, 217709504, 217838912, 217972672, - 218102848, 218233024, 218364736, 218496832, 218627776, 218759104, - 218888896, 219021248, 219151936, 219281728, 219413056, 219545024, - 219675968, 219807296, 219938624, 220069312, 220200128, 220331456, - 220461632, 220592704, 220725184, 220855744, 220987072, 221117888, - 221249216, 221378368, 221510336, 221642048, 221772736, 221904832, - 222031808, 222166976, 222297536, 222428992, 222559936, 222690368, - 222820672, 222953152, 223083968, 223213376, 223345984, 223476928, - 223608512, 223738688, 223869376, 224001472, 224132672, 224262848, - 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283377344, 283508416, 283639744, 283770304, 283901504, 284032576, - 284163136, 284294848, 284426176, 284556992, 284687296, 284819264, - 284950208, 285081536} diff --git a/pow/ethash_algo_go1.7.go b/pow/ethash_algo_go1.7.go deleted file mode 100644 index ce05b3bb0..000000000 --- a/pow/ethash_algo_go1.7.go +++ /dev/null @@ -1,47 +0,0 @@ -// Copyright 2017 The go-ethereum Authors -// This file is part of the go-ethereum library. -// -// The go-ethereum library is free software: you can redistribute it and/or modify -// it under the terms of the GNU Lesser General Public License as published by -// the Free Software Foundation, either version 3 of the License, or -// (at your option) any later version. -// -// The go-ethereum library is distributed in the hope that it will be useful, -// but WITHOUT ANY WARRANTY; without even the implied warranty of -// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the -// GNU Lesser General Public License for more details. -// -// You should have received a copy of the GNU Lesser General Public License -// along with the go-ethereum library. If not, see <http://www.gnu.org/licenses/>. - -// +build !go1.8 - -package pow - -// cacheSize calculates and returns the size of the ethash verification cache that -// belongs to a certain block number. The cache size grows linearly, however, we -// always take the highest prime below the linearly growing threshold in order to -// reduce the risk of accidental regularities leading to cyclic behavior. -func cacheSize(block uint64) uint64 { - // If we have a pre-generated value, use that - epoch := int(block / epochLength) - if epoch < len(cacheSizes) { - return cacheSizes[epoch] - } - // We don't have a way to verify primes fast before Go 1.8 - panic("fast prime testing unsupported in Go < 1.8") -} - -// datasetSize calculates and returns the size of the ethash mining dataset that -// belongs to a certain block number. The dataset size grows linearly, however, we -// always take the highest prime below the linearly growing threshold in order to -// reduce the risk of accidental regularities leading to cyclic behavior. -func datasetSize(block uint64) uint64 { - // If we have a pre-generated value, use that - epoch := int(block / epochLength) - if epoch < len(datasetSizes) { - return datasetSizes[epoch] - } - // We don't have a way to verify primes fast before Go 1.8 - panic("fast prime testing unsupported in Go < 1.8") -} diff --git a/pow/ethash_algo_go1.8.go b/pow/ethash_algo_go1.8.go deleted file mode 100644 index cac96cd5e..000000000 --- a/pow/ethash_algo_go1.8.go +++ /dev/null @@ -1,57 +0,0 @@ -// Copyright 2017 The go-ethereum Authors -// This file is part of the go-ethereum library. -// -// The go-ethereum library is free software: you can redistribute it and/or modify -// it under the terms of the GNU Lesser General Public License as published by -// the Free Software Foundation, either version 3 of the License, or -// (at your option) any later version. -// -// The go-ethereum library is distributed in the hope that it will be useful, -// but WITHOUT ANY WARRANTY; without even the implied warranty of -// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the -// GNU Lesser General Public License for more details. -// -// You should have received a copy of the GNU Lesser General Public License -// along with the go-ethereum library. If not, see <http://www.gnu.org/licenses/>. - -// +build go1.8 - -package pow - -import "math/big" - -// cacheSize calculates and returns the size of the ethash verification cache that -// belongs to a certain block number. The cache size grows linearly, however, we -// always take the highest prime below the linearly growing threshold in order to -// reduce the risk of accidental regularities leading to cyclic behavior. -func cacheSize(block uint64) uint64 { - // If we have a pre-generated value, use that - epoch := int(block / epochLength) - if epoch < len(cacheSizes) { - return cacheSizes[epoch] - } - // No known cache size, calculate manually (sanity branch only) - size := uint64(cacheInitBytes + cacheGrowthBytes*uint64(epoch) - hashBytes) - for !new(big.Int).SetUint64(size / hashBytes).ProbablyPrime(1) { // Always accurate for n < 2^64 - size -= 2 * hashBytes - } - return size -} - -// datasetSize calculates and returns the size of the ethash mining dataset that -// belongs to a certain block number. The dataset size grows linearly, however, we -// always take the highest prime below the linearly growing threshold in order to -// reduce the risk of accidental regularities leading to cyclic behavior. -func datasetSize(block uint64) uint64 { - // If we have a pre-generated value, use that - epoch := int(block / epochLength) - if epoch < len(datasetSizes) { - return datasetSizes[epoch] - } - // No known dataset size, calculate manually (sanity branch only) - size := uint64(datasetInitBytes + datasetGrowthBytes*uint64(epoch) - mixBytes) - for !new(big.Int).SetUint64(size / mixBytes).ProbablyPrime(1) { // Always accurate for n < 2^64 - size -= 2 * mixBytes - } - return size -} diff --git a/pow/ethash_algo_go1.8_test.go b/pow/ethash_algo_go1.8_test.go deleted file mode 100644 index 57e0b0b7a..000000000 --- a/pow/ethash_algo_go1.8_test.go +++ /dev/null @@ -1,46 +0,0 @@ -// Copyright 2017 The go-ethereum Authors -// This file is part of the go-ethereum library. -// -// The go-ethereum library is free software: you can redistribute it and/or modify -// it under the terms of the GNU Lesser General Public License as published by -// the Free Software Foundation, either version 3 of the License, or -// (at your option) any later version. -// -// The go-ethereum library is distributed in the hope that it will be useful, -// but WITHOUT ANY WARRANTY; without even the implied warranty of -// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the -// GNU Lesser General Public License for more details. -// -// You should have received a copy of the GNU Lesser General Public License -// along with the go-ethereum library. If not, see <http://www.gnu.org/licenses/>. - -// +build go1.8 - -package pow - -import "testing" - -// Tests whether the dataset size calculator work correctly by cross checking the -// hard coded lookup table with the value generated by it. -func TestSizeCalculations(t *testing.T) { - var tests []uint64 - - // Verify all the cache sizes from the lookup table - defer func(sizes []uint64) { cacheSizes = sizes }(cacheSizes) - tests, cacheSizes = cacheSizes, []uint64{} - - for i, test := range tests { - if size := cacheSize(uint64(i*epochLength) + 1); size != test { - t.Errorf("cache %d: cache size mismatch: have %d, want %d", i, size, test) - } - } - // Verify all the dataset sizes from the lookup table - defer func(sizes []uint64) { datasetSizes = sizes }(datasetSizes) - tests, datasetSizes = datasetSizes, []uint64{} - - for i, test := range tests { - if size := datasetSize(uint64(i*epochLength) + 1); size != test { - t.Errorf("dataset %d: dataset size mismatch: have %d, want %d", i, size, test) - } - } -} diff --git a/pow/ethash_algo_test.go b/pow/ethash_algo_test.go deleted file mode 100644 index 0605d70ad..000000000 --- a/pow/ethash_algo_test.go +++ /dev/null @@ -1,774 +0,0 @@ -// Copyright 2017 The go-ethereum Authors -// This file is part of the go-ethereum library. -// -// The go-ethereum library is free software: you can redistribute it and/or modify -// it under the terms of the GNU Lesser General Public License as published by -// the Free Software Foundation, either version 3 of the License, or -// (at your option) any later version. -// -// The go-ethereum library is distributed in the hope that it will be useful, -// but WITHOUT ANY WARRANTY; without even the implied warranty of -// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the -// GNU Lesser General Public License for more details. -// -// You should have received a copy of the GNU Lesser General Public License -// along with the go-ethereum library. If not, see <http://www.gnu.org/licenses/>. - -package pow - -import ( - "bytes" - "io/ioutil" - "math/big" - "os" - "reflect" - "sync" - "testing" - - "github.com/ethereum/go-ethereum/common" - "github.com/ethereum/go-ethereum/common/hexutil" - "github.com/ethereum/go-ethereum/core/types" -) - -// Tests that verification caches can be correctly generated. -func TestCacheGeneration(t *testing.T) { - tests := []struct { - size uint64 - epoch uint64 - cache []byte - }{ - { - size: 1024, - epoch: 0, - cache: hexutil.MustDecode("0x" + - "7ce2991c951f7bf4c4c1bb119887ee07871eb5339d7b97b8588e85c742de90e5bafd5bbe6ce93a134fb6be9ad3e30db99d9528a2ea7846833f52e9ca119b6b54" + - "8979480c46e19972bd0738779c932c1b43e665a2fd3122fc3ddb2691f353ceb0ed3e38b8f51fd55b6940290743563c9f8fa8822e611924657501a12aafab8a8d" + - "88fb5fbae3a99d14792406672e783a06940a42799b1c38bc28715db6d37cb11f9f6b24e386dc52dd8c286bd8c36fa813dffe4448a9f56ebcbeea866b42f68d22" + - "6c32aae4d695a23cab28fd74af53b0c2efcc180ceaaccc0b2e280103d097a03c1d1b0f0f26ce5f32a90238f9bc49f645db001ef9cd3d13d44743f841fad11a37" + - "fa290c62c16042f703578921f30b9951465aae2af4a5dad43a7341d7b4a62750954965a47a1c3af638dc3495c4d62a9bab843168c9fc0114e79cffd1b2827b01" + - "75d30ba054658f214e946cf24c43b40d3383fbb0493408e5c5392434ca21bbcf43200dfb876c713d201813934fa485f48767c5915745cf0986b1dc0f33e57748" + - "bf483ee2aff4248dfe461ec0504a13628401020fc22638584a8f2f5206a13b2f233898c78359b21c8226024d0a7a93df5eb6c282bdbf005a4aab497e096f2847" + - "76c71cee57932a8fb89f6d6b8743b60a4ea374899a94a2e0f218d5c55818cefb1790c8529a76dba31ebb0f4592d709b49587d2317970d39c086f18dd244291d9" + - "eedb16705e53e3350591bd4ff4566a3595ac0f0ce24b5e112a3d033bc51b6fea0a92296dea7f5e20bf6ee6bc347d868fda193c395b9bb147e55e5a9f67cfe741" + - "7eea7d699b155bd13804204df7ea91fa9249e4474dddf35188f77019c67d201e4c10d7079c5ad492a71afff9a23ca7e900ba7d1bdeaf3270514d8eb35eab8a0a" + - "718bb7273aeb37768fa589ed8ab01fbf4027f4ebdbbae128d21e485f061c20183a9bc2e31edbda0727442e9d58eb0fe198440fe199e02e77c0f7b99973f1f74c" + - "c9089a51ab96c94a84d66e6aa48b2d0a4543adb5a789039a2aa7b335ca85c91026c7d3c894da53ae364188c3fd92f78e01d080399884a47385aa792e38150cda" + - "a8620b2ebeca41fbc773bb837b5e724d6eb2de570d99858df0d7d97067fb8103b21757873b735097b35d3bea8fd1c359a9e8a63c1540c76c9784cf8d975e995c" + - "778401b94a2e66e6993ad67ad3ecdc2acb17779f1ea8606827ec92b11c728f8c3b6d3f04a3e6ed05ff81dd76d5dc5695a50377bc135aaf1671cf68b750315493" + - "6c64510164d53312bf3c41740c7a237b05faf4a191bd8a95dafa068dbcf370255c725900ce5c934f36feadcfe55b687c440574c1f06f39d207a8553d39156a24" + - "845f64fd8324bb85312979dead74f764c9677aab89801ad4f927f1c00f12e28f22422bb44200d1969d9ab377dd6b099dc6dbc3222e9321b2c1e84f8e2f07731c"), - }, - { - size: 1024, - epoch: 1, - cache: hexutil.MustDecode("0x" + - "1f56855d59cc5a085720899b4377a0198f1abe948d85fe5820dc0e346b7c0931b9cde8e541d751de3b2b3275d0aabfae316209d5879297d8bd99f8a033c9d4df" + - "35add1029f4e6404a022d504fb8023e42989aba985a65933b0109c7218854356f9284983c9e7de97de591828ae348b63d1fc78d8db58157344d4e06530ffd422" + - "5c7f6080d451ff94961ec2dd9e28e6d81b49102451676dbdcb6ef1094c1e8b29e7e808d47b2ba5aeb52dabf00d5f0ee08c116289cbf56d8132e5ca557c3d6220" + - "5ba3a48539acabfd4ca3c89e3aaa668e24ffeaeb9eb0136a9fc5a8a676b6d5ad76175eeda0a1fa44b5ff5591079e4b7f581569b6c82416adcb82d7e92980df67" + - "2248c4024013e7be52cf91a82491627d9e6d80eda2770ab82badc5e120cd33a4c84495f718b57396a8f397e797087fad81fa50f0e2f5da71e40816a85de35a96" + - "3cd351364905c45b3116ff25851d43a2ca1d2aa5cdb408440dabef8c57778fc18608bf431d0c7ffd37649a21a7bb9d90def39c821669dbaf165c0262434dfb08" + - "5d057a12de4a7a59fd2dfc931c29c20371abf748b69b618a9bd485b3fb3166cad4d3d27edf0197aabeceb28b96670bdf020f26d1bb9b564aaf82d866bdffd6d4" + - "1aea89e20b15a5d1264ab01d1556bfc2a266081609d60928216bd9646038f07de9fedcc9f2b86ab1b07d7bd88ba1df08b3d89b2ac789001b48a723f217debcb7" + - "090303a3ef50c1d5d99a75c640ec2b401ab149e06511753d8c49cafdde2929ae61e09cc0f0319d262869d21ead9e0cf5ff2de3dbedfb994f32432d2e4aa44c82" + - "7c42781d1477fe03ea0772998e776d63363c6c3edd2d52c89b4d2c9d89cdd90fa33b2b41c8e3f78ef06fe90bcf5cc5756d33a032f16b744141aaa8852bb4cb3a" + - "40792b93489c6d6e56c235ec4aa36c263e9b766a4daaff34b2ea709f9f811aef498a65bfbc1deffd36fcc4d1a123345fac7bf57a1fb50394843cd28976a6c7ff" + - "fe70f7b8d8f384aa06e2c9964c92a8788cef397fffdd35181b42a35d5d98cd7244bbd09e802888d7efc0311ae58e0961e3656205df4bdc553f317df4b6ede4ca" + - "846294a32aec830ab1aa5aac4e78b821c35c70fd752fec353e373bf9be656e775a0111bcbeffdfebd3bd5251d27b9f6971aa561a2bd27a99d61b2ce3965c3726" + - "1e114353e6a31b09340f4078b8a8c6ce6ff4213067a8f21020f78aff4f8b472b701ef730aacb8ce7806ea31b14abe8f8efdd6357ca299d339abc4e43ba324ad1" + - "efe6eb1a5a6e137daa6ec9f6be30931ca368a944cfcf2a0a29f9a9664188f0466e6f078c347f9fe26a9a89d2029462b19245f24ace47aecace6ef85a4e96b31b" + - "5f470eb0165c6375eb8f245d50a25d521d1e569e3b2dccce626752bb26eae624a24511e831a81fab6898a791579f462574ca4851e6588116493dbccc3072e0c5"), - }, - } - for i, tt := range tests { - cache := make([]uint32, tt.size/4) - generateCache(cache, tt.epoch, seedHash(tt.epoch*epochLength+1)) - - want := make([]uint32, tt.size/4) - prepare(want, tt.cache) - - if !reflect.DeepEqual(cache, want) { - t.Errorf("cache %d: content mismatch: have %x, want %x", i, cache, want) - } - } -} - -func TestDatasetGeneration(t *testing.T) { - tests := []struct { - epoch uint64 - cacheSize uint64 - datasetSize uint64 - dataset []byte - }{ - { - epoch: 0, - cacheSize: 1024, - datasetSize: 32 * 1024, - dataset: hexutil.MustDecode("0x" + - "4bc09fbd530a041dd2ec296110a29e8f130f179c59d223f51ecce3126e8b0c74326abc2f32ccd9d7f976bd0944e3ccf8479db39343cbbffa467046ca97e2da63" + - "da5f9d9688c7c33ab7b8aace570e422fa48b24659b72fc534669209d66389ca15b099c5604601e7581488e3bd6925cec0f12d465f8004d4fa84793f8e1e46a1b" + - "31b7298991c6142f4f0b6e6b296728ae5fa63ccb667b61fbb1b078003d18d97b906af157debed5e6c55d5a61cae90c85f9e97d565314a2f9fd9e0c08430547d0" + - "7cfcee3271f921b95c32a11596219abaa30abc62c2c72c6725078c436c677320594df6bcb92134c1b114fffec982a1f68f13a9f812f074b9fb9c78f2cd4c1c90" + - "7ebf1e447f7a422b06303921e3d54f430584d849eaa4b7d652e92a5d659bdfc462adcdd7991e8c66a19da4ddb5390463d073941491859397f135ebbbdbdf5801" + - "cafb873c383893390141ae385515504d74a33608273310c312ba468046d2e20c271a38cc0e3920b39705050e752f34f244fc23ddd17ff18677756a87671d4145" + - 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"fc3b9e7030bb212b17de198edfccde29d04224798c1204e47ea235f048724fac62d637d1ba0ee3922048fcf79c746b6c0c036d882e3491fd72bad6e009c6403e" + - "55876f4d31330caa02aedd0b0c121c3c41e736853a08071f0dd4ddc7412db0bbe274a9ac2932552bb37c40e72c2ef1d7cca8236942e480d709d3ea9d5ae0a1b7", - ), - }, - } - for i, tt := range tests { - cache := make([]uint32, tt.cacheSize/4) - generateCache(cache, tt.epoch, seedHash(tt.epoch*epochLength+1)) - - dataset := make([]uint32, tt.datasetSize/4) - generateDataset(dataset, tt.epoch, cache) - - want := make([]uint32, tt.datasetSize/4) - prepare(want, tt.dataset) - - if !reflect.DeepEqual(dataset, want) { - t.Errorf("dataset %d: content mismatch: have %x, want %x", i, dataset, want) - } - } -} - -// Tests whether the hashimoto lookup works for both light as well as the full -// datasets. -func TestHashimoto(t *testing.T) { - // Create the verification cache and mining dataset - cache := make([]uint32, 1024/4) - generateCache(cache, 0, make([]byte, 32)) - - dataset := make([]uint32, 32*1024/4) - generateDataset(dataset, 0, cache) - - // Create a block to verify - hash := hexutil.MustDecode("0xc9149cc0386e689d789a1c2f3d5d169a61a6218ed30e74414dc736e442ef3d1f") - nonce := uint64(0) - - wantDigest := hexutil.MustDecode("0xe4073cffaef931d37117cefd9afd27ea0f1cad6a981dd2605c4a1ac97c519800") - wantResult := hexutil.MustDecode("0xd3539235ee2e6f8db665c0a72169f55b7f6c605712330b778ec3944f0eb5a557") - - digest, result := hashimotoLight(32*1024, cache, hash, nonce) - if !bytes.Equal(digest, wantDigest) { - t.Errorf("light hashimoto digest mismatch: have %x, want %x", digest, wantDigest) - } - if !bytes.Equal(result, wantResult) { - t.Errorf("light hashimoto result mismatch: have %x, want %x", result, wantResult) - } - digest, result = hashimotoFull(dataset, hash, nonce) - if !bytes.Equal(digest, wantDigest) { - t.Errorf("full hashimoto digest mismatch: have %x, want %x", digest, wantDigest) - } - if !bytes.Equal(result, wantResult) { - t.Errorf("full hashimoto result mismatch: have %x, want %x", result, wantResult) - } -} - -// Tests that caches generated on disk may be done concurrently. -func TestConcurrentDiskCacheGeneration(t *testing.T) { - // Create a temp folder to generate the caches into - cachedir, err := ioutil.TempDir("", "") - if err != nil { - t.Fatalf("Failed to create temporary cache dir: %v", err) - } - defer os.RemoveAll(cachedir) - - // Define a heavy enough block, one from mainnet should do - block := types.NewBlockWithHeader(&types.Header{ - Number: big.NewInt(3311058), - ParentHash: common.HexToHash("0xd783efa4d392943503f28438ad5830b2d5964696ffc285f338585e9fe0a37a05"), - UncleHash: common.HexToHash("0x1dcc4de8dec75d7aab85b567b6ccd41ad312451b948a7413f0a142fd40d49347"), - Coinbase: common.HexToAddress("0xc0ea08a2d404d3172d2add29a45be56da40e2949"), - Root: common.HexToHash("0x77d14e10470b5850332524f8cd6f69ad21f070ce92dca33ab2858300242ef2f1"), - TxHash: common.HexToHash("0x56e81f171bcc55a6ff8345e692c0f86e5b48e01b996cadc001622fb5e363b421"), - ReceiptHash: common.HexToHash("0x56e81f171bcc55a6ff8345e692c0f86e5b48e01b996cadc001622fb5e363b421"), - Difficulty: big.NewInt(167925187834220), - GasLimit: big.NewInt(4015682), - GasUsed: big.NewInt(0), - Time: big.NewInt(1488928920), - Extra: []byte("www.bw.com"), - MixDigest: common.HexToHash("0x3e140b0784516af5e5ec6730f2fb20cca22f32be399b9e4ad77d32541f798cd0"), - Nonce: types.EncodeNonce(0xf400cd0006070c49), - }) - // Simulate multiple processes sharing the same datadir - var pend sync.WaitGroup - - for i := 0; i < 3; i++ { - pend.Add(1) - - go func(idx int) { - defer pend.Done() - - ethash := NewFullEthash(cachedir, 0, 1, "", 0, 0) - if err := ethash.Verify(block); err != nil { - t.Errorf("proc %d: block verification failed: %v", idx, err) - } - }(i) - } - pend.Wait() -} - -func TestTestMode(t *testing.T) { - head := &types.Header{Difficulty: big.NewInt(100)} - ethash := NewTestEthash() - nonce, mix := ethash.Search(types.NewBlockWithHeader(head), nil) - head.Nonce = types.EncodeNonce(nonce) - copy(head.MixDigest[:], mix) - if err := ethash.Verify(types.NewBlockWithHeader(head)); err != nil { - t.Error("unexpected Verify error:", err) - } -} - -// Benchmarks the cache generation performance. -func BenchmarkCacheGeneration(b *testing.B) { - for i := 0; i < b.N; i++ { - cache := make([]uint32, cacheSize(1)/4) - generateCache(cache, 0, make([]byte, 32)) - } -} - -// Benchmarks the dataset (small) generation performance. -func BenchmarkSmallDatasetGeneration(b *testing.B) { - cache := make([]uint32, 65536/4) - generateCache(cache, 0, make([]byte, 32)) - - b.ResetTimer() - for i := 0; i < b.N; i++ { - dataset := make([]uint32, 32*65536/4) - generateDataset(dataset, 0, cache) - } -} - -// Benchmarks the light verification performance. -func BenchmarkHashimotoLight(b *testing.B) { - cache := make([]uint32, cacheSize(1)/4) - generateCache(cache, 0, make([]byte, 32)) - - hash := hexutil.MustDecode("0xc9149cc0386e689d789a1c2f3d5d169a61a6218ed30e74414dc736e442ef3d1f") - - b.ResetTimer() - for i := 0; i < b.N; i++ { - hashimotoLight(datasetSize(1), cache, hash, 0) - } -} - -// Benchmarks the full (small) verification performance. -func BenchmarkHashimotoFullSmall(b *testing.B) { - cache := make([]uint32, 65536/4) - generateCache(cache, 0, make([]byte, 32)) - - dataset := make([]uint32, 32*65536/4) - generateDataset(dataset, 0, cache) - - hash := hexutil.MustDecode("0xc9149cc0386e689d789a1c2f3d5d169a61a6218ed30e74414dc736e442ef3d1f") - - b.ResetTimer() - for i := 0; i < b.N; i++ { - hashimotoFull(dataset, hash, 0) - } -} diff --git a/pow/pow.go b/pow/pow.go deleted file mode 100644 index 4849adb3e..000000000 --- a/pow/pow.go +++ /dev/null @@ -1,58 +0,0 @@ -// Copyright 2014 The go-ethereum Authors -// This file is part of the go-ethereum library. -// -// The go-ethereum library is free software: you can redistribute it and/or modify -// it under the terms of the GNU Lesser General Public License as published by -// the Free Software Foundation, either version 3 of the License, or -// (at your option) any later version. -// -// The go-ethereum library is distributed in the hope that it will be useful, -// but WITHOUT ANY WARRANTY; without even the implied warranty of -// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the -// GNU Lesser General Public License for more details. -// -// You should have received a copy of the GNU Lesser General Public License -// along with the go-ethereum library. If not, see <http://www.gnu.org/licenses/>. - -package pow - -import ( - "math/big" - - "github.com/ethereum/go-ethereum/common" - "github.com/ethereum/go-ethereum/core/types" -) - -type Block interface { - Difficulty() *big.Int - HashNoNonce() common.Hash - Nonce() uint64 - MixDigest() common.Hash - NumberU64() uint64 -} - -type ChainManager interface { - GetBlockByNumber(uint64) *types.Block - CurrentBlock() *types.Block -} - -type PoW interface { - Verify(block Block) error - Search(block Block, stop <-chan struct{}) (uint64, []byte) - Hashrate() float64 -} - -// FakePow is a non-validating proof of work implementation. -// It returns true from Verify for any block. -type FakePow struct{} - -// Verify implements PoW, returning a success for an input. -func (pow FakePow) Verify(block Block) error { return nil } - -// Search implements PoW, returning the nonce 0 for any call. -func (pow FakePow) Search(block Block, stop <-chan struct{}) (uint64, []byte) { - return 0, nil -} - -// Hashrate implements PoW, returning 0. -func (pow FakePow) Hashrate() float64 { return 0 } diff --git a/pow/xor.go b/pow/xor.go deleted file mode 100644 index 558aeb469..000000000 --- a/pow/xor.go +++ /dev/null @@ -1,85 +0,0 @@ -// Copyright 2013 The Go Authors. All rights reserved. -// Use of this source code is governed by a BSD-style -// license that can be found in the LICENSE file. - -// Source: https://golang.org/src/crypto/cipher/xor.go - -package pow - -import ( - "runtime" - "unsafe" -) - -const wordSize = int(unsafe.Sizeof(uintptr(0))) -const supportsUnaligned = runtime.GOARCH == "386" || runtime.GOARCH == "amd64" || runtime.GOARCH == "ppc64" || runtime.GOARCH == "ppc64le" || runtime.GOARCH == "s390x" - -// fastXORBytes xors in bulk. It only works on architectures that -// support unaligned read/writes. -func fastXORBytes(dst, a, b []byte) int { - n := len(a) - if len(b) < n { - n = len(b) - } - - w := n / wordSize - if w > 0 { - dw := *(*[]uintptr)(unsafe.Pointer(&dst)) - aw := *(*[]uintptr)(unsafe.Pointer(&a)) - bw := *(*[]uintptr)(unsafe.Pointer(&b)) - for i := 0; i < w; i++ { - dw[i] = aw[i] ^ bw[i] - } - } - - for i := (n - n%wordSize); i < n; i++ { - dst[i] = a[i] ^ b[i] - } - - return n -} - -func safeXORBytes(dst, a, b []byte) int { - n := len(a) - if len(b) < n { - n = len(b) - } - for i := 0; i < n; i++ { - dst[i] = a[i] ^ b[i] - } - return n -} - -// xorBytes xors the bytes in a and b. The destination is assumed to have enough -// space. Returns the number of bytes xor'd. -func xorBytes(dst, a, b []byte) int { - if supportsUnaligned { - return fastXORBytes(dst, a, b) - } - // TODO(hanwen): if (dst, a, b) have common alignment - // we could still try fastXORBytes. It is not clear - // how often this happens, and it's only worth it if - // the block encryption itself is hardware - // accelerated. - return safeXORBytes(dst, a, b) -} - -// fastXORWords XORs multiples of 4 or 8 bytes (depending on architecture.) -// The arguments are assumed to be of equal length. -func fastXORWords(dst, a, b []byte) { - dw := *(*[]uintptr)(unsafe.Pointer(&dst)) - aw := *(*[]uintptr)(unsafe.Pointer(&a)) - bw := *(*[]uintptr)(unsafe.Pointer(&b)) - n := len(b) / wordSize - for i := 0; i < n; i++ { - dw[i] = aw[i] ^ bw[i] - } -} - -func xorWords(dst, a, b []byte) { - if supportsUnaligned { - fastXORWords(dst, a, b) - } else { - safeXORBytes(dst, a, b) - } -} |