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-rw-r--r--pow/ethash.go589
-rw-r--r--pow/ethash_algo.go1103
-rw-r--r--pow/ethash_algo_go1.7.go47
-rw-r--r--pow/ethash_algo_go1.8.go57
-rw-r--r--pow/ethash_algo_go1.8_test.go46
-rw-r--r--pow/ethash_algo_test.go774
-rw-r--r--pow/pow.go58
-rw-r--r--pow/xor.go85
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,
- 2332032128, 2340420224, 2348808064, 2357196416, 2365580416,
- 2373966976, 2382363008, 2390748544, 2399139968, 2407530368,
- 2415918976, 2424307328, 2432695424, 2441084288, 2449472384,
- 2457861248, 2466247808, 2474637184, 2483026816, 2491414144,
- 2499803776, 2508191872, 2516582272, 2524970368, 2533359232,
- 2541743488, 2550134144, 2558525056, 2566913408, 2575301504,
- 2583686528, 2592073856, 2600467328, 2608856192, 2617240448,
- 2625631616, 2634022016, 2642407552, 2650796416, 2659188352,
- 2667574912, 2675965312, 2684352896, 2692738688, 2701130624,
- 2709518464, 2717907328, 2726293376, 2734685056, 2743073152,
- 2751462016, 2759851648, 2768232832, 2776625536, 2785017728,
- 2793401984, 2801794432, 2810182016, 2818571648, 2826959488,
- 2835349376, 2843734144, 2852121472, 2860514432, 2868900992,
- 2877286784, 2885676928, 2894069632, 2902451584, 2910843008,
- 2919234688, 2927622784, 2936011648, 2944400768, 2952789376,
- 2961177728, 2969565568, 2977951616, 2986338944, 2994731392,
- 3003120256, 3011508352, 3019895936, 3028287104, 3036675968,
- 3045063808, 3053452928, 3061837696, 3070228352, 3078615424,
- 3087003776, 3095394944, 3103782272, 3112173184, 3120562048,
- 3128944768, 3137339264, 3145725056, 3154109312, 3162505088,
- 3170893184, 3179280256, 3187669376, 3196056704, 3204445568,
- 3212836736, 3221224064, 3229612928, 3238002304, 3246391168,
- 3254778496, 3263165824, 3271556224, 3279944576, 3288332416,
- 3296719232, 3305110912, 3313500032, 3321887104, 3330273152,
- 3338658944, 3347053184, 3355440512, 3363827072, 3372220288,
- 3380608384, 3388997504, 3397384576, 3405774208, 3414163072,
- 3422551936, 3430937984, 3439328384, 3447714176, 3456104576,
- 3464493952, 3472883584, 3481268864, 3489655168, 3498048896,
- 3506434432, 3514826368, 3523213952, 3531603584, 3539987072,
- 3548380288, 3556763264, 3565157248, 3573545344, 3581934464,
- 3590324096, 3598712704, 3607098752, 3615488384, 3623877248,
- 3632265856, 3640646528, 3649043584, 3657430144, 3665821568,
- 3674207872, 3682597504, 3690984832, 3699367808, 3707764352,
- 3716152448, 3724541056, 3732925568, 3741318016, 3749706368,
- 3758091136, 3766481536, 3774872704, 3783260032, 3791650432,
- 3800036224, 3808427648, 3816815488, 3825204608, 3833592704,
- 3841981568, 3850370432, 3858755968, 3867147904, 3875536256,
- 3883920512, 3892313728, 3900702592, 3909087872, 3917478784,
- 3925868416, 3934256512, 3942645376, 3951032192, 3959422336,
- 3967809152, 3976200064, 3984588416, 3992974976, 4001363584,
- 4009751168, 4018141312, 4026530432, 4034911616, 4043308928,
- 4051695488, 4060084352, 4068472448, 4076862848, 4085249408,
- 4093640576, 4102028416, 4110413696, 4118805632, 4127194496,
- 4135583104, 4143971968, 4152360832, 4160746112, 4169135744,
- 4177525888, 4185912704, 4194303616, 4202691968, 4211076736,
- 4219463552, 4227855488, 4236246656, 4244633728, 4253022848,
- 4261412224, 4269799808, 4278184832, 4286578048, 4294962304,
- 4303349632, 4311743104, 4320130432, 4328521088, 4336909184,
- 4345295488, 4353687424, 4362073472, 4370458496, 4378852736,
- 4387238528, 4395630208, 4404019072, 4412407424, 4420790656,
- 4429182848, 4437571456, 4445962112, 4454344064, 4462738048,
- 4471119232, 4479516544, 4487904128, 4496289664, 4504682368,
- 4513068416, 4521459584, 4529846144, 4538232704, 4546619776,
- 4555010176, 4563402112, 4571790208, 4580174464, 4588567936,
- 4596957056, 4605344896, 4613734016, 4622119808, 4630511488,
- 4638898816, 4647287936, 4655675264, 4664065664, 4672451968,
- 4680842624, 4689231488, 4697620352, 4706007424, 4714397056,
- 4722786176, 4731173248, 4739562368, 4747951744, 4756340608,
- 4764727936, 4773114496, 4781504384, 4789894784, 4798283648,
- 4806667648, 4815059584, 4823449472, 4831835776, 4840226176,
- 4848612224, 4857003392, 4865391488, 4873780096, 4882169728,
- 4890557312, 4898946944, 4907333248, 4915722368, 4924110976,
- 4932499328, 4940889728, 4949276032, 4957666432, 4966054784,
- 4974438016, 4982831488, 4991221376, 4999607168, 5007998848,
- 5016386432, 5024763776, 5033164672, 5041544576, 5049941888,
- 5058329728, 5066717056, 5075107456, 5083494272, 5091883904,
- 5100273536, 5108662144, 5117048192, 5125436032, 5133827456,
- 5142215296, 5150605184, 5158993024, 5167382144, 5175769472,
- 5184157568, 5192543872, 5200936064, 5209324928, 5217711232,
- 5226102656, 5234490496, 5242877312, 5251263872, 5259654016,
- 5268040832, 5276434304, 5284819328, 5293209728, 5301598592,
- 5309986688, 5318374784, 5326764416, 5335151488, 5343542144,
- 5351929472, 5360319872, 5368706944, 5377096576, 5385484928,
- 5393871232, 5402263424, 5410650496, 5419040384, 5427426944,
- 5435816576, 5444205952, 5452594816, 5460981376, 5469367936,
- 5477760896, 5486148736, 5494536832, 5502925952, 5511315328,
- 5519703424, 5528089984, 5536481152, 5544869504, 5553256064,
- 5561645696, 5570032768, 5578423936, 5586811264, 5595193216,
- 5603585408, 5611972736, 5620366208, 5628750464, 5637143936,
- 5645528192, 5653921408, 5662310272, 5670694784, 5679082624,
- 5687474048, 5695864448, 5704251008, 5712641408, 5721030272,
- 5729416832, 5737806208, 5746194304, 5754583936, 5762969984,
- 5771358592, 5779748224, 5788137856, 5796527488, 5804911232,
- 5813300608, 5821692544, 5830082176, 5838468992, 5846855552,
- 5855247488, 5863636096, 5872024448, 5880411008, 5888799872,
- 5897186432, 5905576832, 5913966976, 5922352768, 5930744704,
- 5939132288, 5947522432, 5955911296, 5964299392, 5972688256,
- 5981074304, 5989465472, 5997851008, 6006241408, 6014627968,
- 6023015552, 6031408256, 6039796096, 6048185216, 6056574848,
- 6064963456, 6073351808, 6081736064, 6090128768, 6098517632,
- 6106906496, 6115289216, 6123680896, 6132070016, 6140459648,
- 6148849024, 6157237376, 6165624704, 6174009728, 6182403712,
- 6190792064, 6199176064, 6207569792, 6215952256, 6224345216,
- 6232732544, 6241124224, 6249510272, 6257899136, 6266287744,
- 6274676864, 6283065728, 6291454336, 6299843456, 6308232064,
- 6316620928, 6325006208, 6333395584, 6341784704, 6350174848,
- 6358562176, 6366951296, 6375337856, 6383729536, 6392119168,
- 6400504192, 6408895616, 6417283456, 6425673344, 6434059136,
- 6442444672, 6450837376, 6459223424, 6467613056, 6476004224,
- 6484393088, 6492781952, 6501170048, 6509555072, 6517947008,
- 6526336384, 6534725504, 6543112832, 6551500672, 6559888768,
- 6568278656, 6576662912, 6585055616, 6593443456, 6601834112,
- 6610219648, 6618610304, 6626999168, 6635385472, 6643777408,
- 6652164224, 6660552832, 6668941952, 6677330048, 6685719424,
- 6694107776, 6702493568, 6710882176, 6719274112, 6727662976,
- 6736052096, 6744437632, 6752825984, 6761213824, 6769604224,
- 6777993856, 6786383488, 6794770816, 6803158144, 6811549312,
- 6819937664, 6828326528, 6836706176, 6845101696, 6853491328,
- 6861880448, 6870269312, 6878655104, 6887046272, 6895433344,
- 6903822208, 6912212864, 6920596864, 6928988288, 6937377152,
- 6945764992, 6954149248, 6962544256, 6970928768, 6979317376,
- 6987709312, 6996093824, 7004487296, 7012875392, 7021258624,
- 7029652352, 7038038912, 7046427776, 7054818944, 7063207808,
- 7071595136, 7079980928, 7088372608, 7096759424, 7105149824,
- 7113536896, 7121928064, 7130315392, 7138699648, 7147092352,
- 7155479168, 7163865728, 7172249984, 7180648064, 7189036672,
- 7197424768, 7205810816, 7214196608, 7222589824, 7230975104,
- 7239367552, 7247755904, 7256145536, 7264533376, 7272921472,
- 7281308032, 7289694848, 7298088832, 7306471808, 7314864512,
- 7323253888, 7331643008, 7340029568, 7348419712, 7356808832,
- 7365196672, 7373585792, 7381973888, 7390362752, 7398750592,
- 7407138944, 7415528576, 7423915648, 7432302208, 7440690304,
- 7449080192, 7457472128, 7465860992, 7474249088, 7482635648,
- 7491023744, 7499412608, 7507803008, 7516192384, 7524579968,
- 7532967296, 7541358464, 7549745792, 7558134656, 7566524032,
- 7574912896, 7583300992, 7591690112, 7600075136, 7608466816,
- 7616854912, 7625244544, 7633629824, 7642020992, 7650410368,
- 7658794112, 7667187328, 7675574912, 7683961984, 7692349568,
- 7700739712, 7709130368, 7717519232, 7725905536, 7734295424,
- 7742683264, 7751069056, 7759457408, 7767849088, 7776238208,
- 7784626816, 7793014912, 7801405312, 7809792128, 7818179968,
- 7826571136, 7834957184, 7843347328, 7851732352, 7860124544,
- 7868512384, 7876902016, 7885287808, 7893679744, 7902067072,
- 7910455936, 7918844288, 7927230848, 7935622784, 7944009344,
- 7952400256, 7960786048, 7969176704, 7977565312, 7985953408,
- 7994339968, 8002730368, 8011119488, 8019508096, 8027896192,
- 8036285056, 8044674688, 8053062272, 8061448832, 8069838464,
- 8078227328, 8086616704, 8095006592, 8103393664, 8111783552,
- 8120171392, 8128560256, 8136949376, 8145336704, 8153726848,
- 8162114944, 8170503296, 8178891904, 8187280768, 8195669632,
- 8204058496, 8212444544, 8220834176, 8229222272, 8237612672,
- 8246000768, 8254389376, 8262775168, 8271167104, 8279553664,
- 8287944064, 8296333184, 8304715136, 8313108352, 8321497984,
- 8329885568, 8338274432, 8346663296, 8355052928, 8363441536,
- 8371828352, 8380217984, 8388606592, 8396996224, 8405384576,
- 8413772672, 8422161536, 8430549376, 8438939008, 8447326592,
- 8455715456, 8464104832, 8472492928, 8480882048, 8489270656,
- 8497659776, 8506045312, 8514434944, 8522823808, 8531208832,
- 8539602304, 8547990656, 8556378752, 8564768384, 8573154176,
- 8581542784, 8589933952, 8598322816, 8606705024, 8615099264,
- 8623487872, 8631876992, 8640264064, 8648653952, 8657040256,
- 8665430656, 8673820544, 8682209152, 8690592128, 8698977152,
- 8707374464, 8715763328, 8724151424, 8732540032, 8740928384,
- 8749315712, 8757704576, 8766089344, 8774480768, 8782871936,
- 8791260032, 8799645824, 8808034432, 8816426368, 8824812928,
- 8833199488, 8841591424, 8849976448, 8858366336, 8866757248,
- 8875147136, 8883532928, 8891923328, 8900306816, 8908700288,
- 8917088384, 8925478784, 8933867392, 8942250368, 8950644608,
- 8959032704, 8967420544, 8975809664, 8984197504, 8992584064,
- 9000976256, 9009362048, 9017752448, 9026141312, 9034530688,
- 9042917504, 9051307904, 9059694208, 9068084864, 9076471424,
- 9084861824, 9093250688, 9101638528, 9110027648, 9118416512,
- 9126803584, 9135188096, 9143581312, 9151969664, 9160356224,
- 9168747136, 9177134464, 9185525632, 9193910144, 9202302848,
- 9210690688, 9219079552, 9227465344, 9235854464, 9244244864,
- 9252633472, 9261021824, 9269411456, 9277799296, 9286188928,
- 9294574208, 9302965888, 9311351936, 9319740032, 9328131968,
- 9336516736, 9344907392, 9353296768, 9361685888, 9370074752,
- 9378463616, 9386849408, 9395239808, 9403629184, 9412016512,
- 9420405376, 9428795008, 9437181568, 9445570688, 9453960832,
- 9462346624, 9470738048, 9479121536, 9487515008, 9495903616,
- 9504289664, 9512678528, 9521067904, 9529456256, 9537843584,
- 9546233728, 9554621312, 9563011456, 9571398784, 9579788672,
- 9588178304, 9596567168, 9604954496, 9613343104, 9621732992,
- 9630121856, 9638508416, 9646898816, 9655283584, 9663675776,
- 9672061312, 9680449664, 9688840064, 9697230464, 9705617536,
- 9714003584, 9722393984, 9730772608, 9739172224, 9747561088,
- 9755945344, 9764338816, 9772726144, 9781116544, 9789503872,
- 9797892992, 9806282624, 9814670464, 9823056512, 9831439232,
- 9839833984, 9848224384, 9856613504, 9865000576, 9873391232,
- 9881772416, 9890162816, 9898556288, 9906940544, 9915333248,
- 9923721088, 9932108672, 9940496512, 9948888448, 9957276544,
- 9965666176, 9974048384, 9982441088, 9990830464, 9999219584,
- 10007602816, 10015996544, 10024385152, 10032774016, 10041163648,
- 10049548928, 10057940096, 10066329472, 10074717824, 10083105152,
- 10091495296, 10099878784, 10108272256, 10116660608, 10125049216,
- 10133437312, 10141825664, 10150213504, 10158601088, 10166991232,
- 10175378816, 10183766144, 10192157312, 10200545408, 10208935552,
- 10217322112, 10225712768, 10234099328, 10242489472, 10250876032,
- 10259264896, 10267656064, 10276042624, 10284429184, 10292820352,
- 10301209472, 10309598848, 10317987712, 10326375296, 10334763392,
- 10343153536, 10351541632, 10359930752, 10368318592, 10376707456,
- 10385096576, 10393484672, 10401867136, 10410262144, 10418647424,
- 10427039104, 10435425664, 10443810176, 10452203648, 10460589952,
- 10468982144, 10477369472, 10485759104, 10494147712, 10502533504,
- 10510923392, 10519313536, 10527702656, 10536091264, 10544478592,
- 10552867712, 10561255808, 10569642368, 10578032768, 10586423168,
- 10594805632, 10603200128, 10611588992, 10619976064, 10628361344,
- 10636754048, 10645143424, 10653531776, 10661920384, 10670307968,
- 10678696832, 10687086464, 10695475072, 10703863168, 10712246144,
- 10720639616, 10729026688, 10737414784, 10745806208, 10754190976,
- 10762581376, 10770971264, 10779356288, 10787747456, 10796135552,
- 10804525184, 10812915584, 10821301888, 10829692288, 10838078336,
- 10846469248, 10854858368, 10863247232, 10871631488, 10880023424,
- 10888412032, 10896799616, 10905188992, 10913574016, 10921964672,
- 10930352768, 10938742912, 10947132544, 10955518592, 10963909504,
- 10972298368, 10980687488, 10989074816, 10997462912, 11005851776,
- 11014241152, 11022627712, 11031017344, 11039403904, 11047793024,
- 11056184704, 11064570752, 11072960896, 11081343872, 11089737856,
- 11098128256, 11106514816, 11114904448, 11123293568, 11131680128,
- 11140065152, 11148458368, 11156845696, 11165236864, 11173624192,
- 11182013824, 11190402688, 11198790784, 11207179136, 11215568768,
- 11223957376, 11232345728, 11240734592, 11249122688, 11257511296,
- 11265899648, 11274285952, 11282675584, 11291065472, 11299452544,
- 11307842432, 11316231296, 11324616832, 11333009024, 11341395584,
- 11349782656, 11358172288, 11366560384, 11374950016, 11383339648,
- 11391721856, 11400117376, 11408504192, 11416893568, 11425283456,
- 11433671552, 11442061184, 11450444672, 11458837888, 11467226752,
- 11475611776, 11484003968, 11492392064, 11500780672, 11509169024,
- 11517550976, 11525944448, 11534335616, 11542724224, 11551111808,
- 11559500672, 11567890304, 11576277376, 11584667008, 11593056128,
- 11601443456, 11609830016, 11618221952, 11626607488, 11634995072,
- 11643387776, 11651775104, 11660161664, 11668552576, 11676940928,
- 11685330304, 11693718656, 11702106496, 11710496128, 11718882688,
- 11727273088, 11735660416, 11744050048, 11752437376, 11760824704,
- 11769216128, 11777604736, 11785991296, 11794381952, 11802770048,
- 11811157888, 11819548544, 11827932544, 11836324736, 11844713344,
- 11853100928, 11861486464, 11869879936, 11878268032, 11886656896,
- 11895044992, 11903433088, 11911822976, 11920210816, 11928600448,
- 11936987264, 11945375872, 11953761152, 11962151296, 11970543488,
- 11978928512, 11987320448, 11995708288, 12004095104, 12012486272,
- 12020875136, 12029255552, 12037652096, 12046039168, 12054429568,
- 12062813824, 12071206528, 12079594624, 12087983744, 12096371072,
- 12104759936, 12113147264, 12121534592, 12129924992, 12138314624,
- 12146703232, 12155091584, 12163481216, 12171864704, 12180255872,
- 12188643968, 12197034112, 12205424512, 12213811328, 12222199424,
- 12230590336, 12238977664, 12247365248, 12255755392, 12264143488,
- 12272531584, 12280920448, 12289309568, 12297694592, 12306086528,
- 12314475392, 12322865024, 12331253632, 12339640448, 12348029312,
- 12356418944, 12364805248, 12373196672, 12381580928, 12389969024,
- 12398357632, 12406750592, 12415138432, 12423527552, 12431916416,
- 12440304512, 12448692352, 12457081216, 12465467776, 12473859968,
- 12482245504, 12490636672, 12499025536, 12507411584, 12515801728,
- 12524190592, 12532577152, 12540966272, 12549354368, 12557743232,
- 12566129536, 12574523264, 12582911872, 12591299456, 12599688064,
- 12608074624, 12616463488, 12624845696, 12633239936, 12641631616,
- 12650019968, 12658407296, 12666795136, 12675183232, 12683574656,
- 12691960192, 12700350592, 12708740224, 12717128576, 12725515904,
- 12733906816, 12742295168, 12750680192, 12759071872, 12767460736,
- 12775848832, 12784236928, 12792626816, 12801014656, 12809404288,
- 12817789312, 12826181504, 12834568832, 12842954624, 12851345792,
- 12859732352, 12868122496, 12876512128, 12884901248, 12893289088,
- 12901672832, 12910067584, 12918455168, 12926842496, 12935232896,
- 12943620736, 12952009856, 12960396928, 12968786816, 12977176192,
- 12985563776, 12993951104, 13002341504, 13010730368, 13019115392,
- 13027506304, 13035895168, 13044272512, 13052673152, 13061062528,
- 13069446272, 13077838976, 13086227072, 13094613632, 13103000192,
- 13111393664, 13119782528, 13128157568, 13136559232, 13144945024,
- 13153329536, 13161724288, 13170111872, 13178502784, 13186884736,
- 13195279744, 13203667072, 13212057472, 13220445824, 13228832128,
- 13237221248, 13245610624, 13254000512, 13262388352, 13270777472,
- 13279166336, 13287553408, 13295943296, 13304331904, 13312719488,
- 13321108096, 13329494656, 13337885824, 13346274944, 13354663808,
- 13363051136, 13371439232, 13379825024, 13388210816, 13396605056,
- 13404995456, 13413380224, 13421771392, 13430159744, 13438546048,
- 13446937216, 13455326848, 13463708288, 13472103808, 13480492672,
- 13488875648, 13497269888, 13505657728, 13514045312, 13522435712,
- 13530824576, 13539210112, 13547599232, 13555989376, 13564379008,
- 13572766336, 13581154432, 13589544832, 13597932928, 13606320512,
- 13614710656, 13623097472, 13631477632, 13639874944, 13648264064,
- 13656652928, 13665041792, 13673430656, 13681818496, 13690207616,
- 13698595712, 13706982272, 13715373184, 13723762048, 13732150144,
- 13740536704, 13748926592, 13757316224, 13765700992, 13774090112,
- 13782477952, 13790869376, 13799259008, 13807647872, 13816036736,
- 13824425344, 13832814208, 13841202304, 13849591424, 13857978752,
- 13866368896, 13874754688, 13883145344, 13891533184, 13899919232,
- 13908311168, 13916692096, 13925085056, 13933473152, 13941866368,
- 13950253696, 13958643584, 13967032192, 13975417216, 13983807616,
- 13992197504, 14000582272, 14008973696, 14017363072, 14025752192,
- 14034137984, 14042528384, 14050918016, 14059301504, 14067691648,
- 14076083584, 14084470144, 14092852352, 14101249664, 14109635968,
- 14118024832, 14126407552, 14134804352, 14143188608, 14151577984,
- 14159968384, 14168357248, 14176741504, 14185127296, 14193521024,
- 14201911424, 14210301824, 14218685056, 14227067264, 14235467392,
- 14243855488, 14252243072, 14260630144, 14269021568, 14277409408,
- 14285799296, 14294187904, 14302571392, 14310961792, 14319353728,
- 14327738752, 14336130944, 14344518784, 14352906368, 14361296512,
- 14369685376, 14378071424, 14386462592, 14394848128, 14403230848,
- 14411627392, 14420013952, 14428402304, 14436793472, 14445181568,
- 14453569664, 14461959808, 14470347904, 14478737024, 14487122816,
- 14495511424, 14503901824, 14512291712, 14520677504, 14529064832,
- 14537456768, 14545845632, 14554234496, 14562618496, 14571011456,
- 14579398784, 14587789184, 14596172672, 14604564608, 14612953984,
- 14621341312, 14629724288, 14638120832, 14646503296, 14654897536,
- 14663284864, 14671675264, 14680061056, 14688447616, 14696835968,
- 14705228416, 14713616768, 14722003328, 14730392192, 14738784128,
- 14747172736, 14755561088, 14763947648, 14772336512, 14780725376,
- 14789110144, 14797499776, 14805892736, 14814276992, 14822670208,
- 14831056256, 14839444352, 14847836032, 14856222848, 14864612992,
- 14872997504, 14881388672, 14889775744, 14898165376, 14906553472,
- 14914944896, 14923329664, 14931721856, 14940109696, 14948497024,
- 14956887424, 14965276544, 14973663616, 14982053248, 14990439808,
- 14998830976, 15007216768, 15015605888, 15023995264, 15032385152,
- 15040768384, 15049154944, 15057549184, 15065939072, 15074328448,
- 15082715008, 15091104128, 15099493504, 15107879296, 15116269184,
- 15124659584, 15133042304, 15141431936, 15149824384, 15158214272,
- 15166602368, 15174991232, 15183378304, 15191760512, 15200154496,
- 15208542592, 15216931712, 15225323392, 15233708416, 15242098048,
- 15250489216, 15258875264, 15267265408, 15275654528, 15284043136,
- 15292431488, 15300819584, 15309208192, 15317596544, 15325986176,
- 15334374784, 15342763648, 15351151744, 15359540608, 15367929728,
- 15376318336, 15384706432, 15393092992, 15401481856, 15409869952,
- 15418258816, 15426649984, 15435037568, 15443425664, 15451815296,
- 15460203392, 15468589184, 15476979328, 15485369216, 15493755776,
- 15502146944, 15510534272, 15518924416, 15527311232, 15535699072,
- 15544089472, 15552478336, 15560866688, 15569254528, 15577642624,
- 15586031488, 15594419072, 15602809472, 15611199104, 15619586432,
- 15627975296, 15636364928, 15644753792, 15653141888, 15661529216,
- 15669918848, 15678305152, 15686696576, 15695083136, 15703474048,
- 15711861632, 15720251264, 15728636288, 15737027456, 15745417088,
- 15753804928, 15762194048, 15770582656, 15778971008, 15787358336,
- 15795747712, 15804132224, 15812523392, 15820909696, 15829300096,
- 15837691264, 15846071936, 15854466944, 15862855808, 15871244672,
- 15879634816, 15888020608, 15896409728, 15904799104, 15913185152,
- 15921577088, 15929966464, 15938354816, 15946743424, 15955129472,
- 15963519872, 15971907968, 15980296064, 15988684928, 15997073024,
- 16005460864, 16013851264, 16022241152, 16030629248, 16039012736,
- 16047406976, 16055794816, 16064181376, 16072571264, 16080957824,
- 16089346688, 16097737856, 16106125184, 16114514816, 16122904192,
- 16131292544, 16139678848, 16148066944, 16156453504, 16164839552,
- 16173236096, 16181623424, 16190012032, 16198401152, 16206790528,
- 16215177344, 16223567744, 16231956352, 16240344704, 16248731008,
- 16257117824, 16265504384, 16273898624, 16282281856, 16290668672,
- 16299064192, 16307449216, 16315842176, 16324230016, 16332613504,
- 16341006464, 16349394304, 16357783168, 16366172288, 16374561664,
- 16382951296, 16391337856, 16399726208, 16408116352, 16416505472,
- 16424892032, 16433282176, 16441668224, 16450058624, 16458448768,
- 16466836864, 16475224448, 16483613056, 16492001408, 16500391808,
- 16508779648, 16517166976, 16525555328, 16533944192, 16542330752,
- 16550719616, 16559110528, 16567497088, 16575888512, 16584274816,
- 16592665472, 16601051008, 16609442944, 16617832064, 16626218624,
- 16634607488, 16642996096, 16651385728, 16659773824, 16668163712,
- 16676552576, 16684938112, 16693328768, 16701718144, 16710095488,
- 16718492288, 16726883968, 16735272832, 16743661184, 16752049792,
- 16760436608, 16768827008, 16777214336, 16785599104, 16793992832,
- 16802381696, 16810768768, 16819151744, 16827542656, 16835934848,
- 16844323712, 16852711552, 16861101952, 16869489536, 16877876864,
- 16886265728, 16894653056, 16903044736, 16911431296, 16919821696,
- 16928207488, 16936592768, 16944987776, 16953375616, 16961763968,
- 16970152832, 16978540928, 16986929536, 16995319168, 17003704448,
- 17012096896, 17020481152, 17028870784, 17037262208, 17045649536,
- 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,
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- 225181504, 225312704, 225443776, 225574592, 225704768, 225834176,
- 225966784, 226097216, 226229824, 226360384, 226491712, 226623424,
- 226754368, 226885312, 227015104, 227147456, 227278528, 227409472,
- 227539904, 227669696, 227802944, 227932352, 228065216, 228196288,
- 228326464, 228457792, 228588736, 228720064, 228850112, 228981056,
- 229113152, 229243328, 229375936, 229505344, 229636928, 229769152,
- 229894976, 230030272, 230162368, 230292416, 230424512, 230553152,
- 230684864, 230816704, 230948416, 231079616, 231210944, 231342016,
- 231472448, 231603776, 231733952, 231866176, 231996736, 232127296,
- 232259392, 232388672, 232521664, 232652608, 232782272, 232914496,
- 233043904, 233175616, 233306816, 233438528, 233569984, 233699776,
- 233830592, 233962688, 234092224, 234221888, 234353984, 234485312,
- 234618304, 234749888, 234880832, 235011776, 235142464, 235274048,
- 235403456, 235535936, 235667392, 235797568, 235928768, 236057152,
- 236190272, 236322752, 236453312, 236583616, 236715712, 236846528,
- 236976448, 237108544, 237239104, 237371072, 237501632, 237630784,
- 237764416, 237895232, 238026688, 238157632, 238286912, 238419392,
- 238548032, 238681024, 238812608, 238941632, 239075008, 239206336,
- 239335232, 239466944, 239599168, 239730496, 239861312, 239992384,
- 240122816, 240254656, 240385856, 240516928, 240647872, 240779072,
- 240909632, 241040704, 241171904, 241302848, 241433408, 241565248,
- 241696192, 241825984, 241958848, 242088256, 242220224, 242352064,
- 242481856, 242611648, 242744896, 242876224, 243005632, 243138496,
- 243268672, 243400384, 243531712, 243662656, 243793856, 243924544,
- 244054592, 244187072, 244316608, 244448704, 244580032, 244710976,
- 244841536, 244972864, 245104448, 245233984, 245365312, 245497792,
- 245628736, 245759936, 245889856, 246021056, 246152512, 246284224,
- 246415168, 246545344, 246675904, 246808384, 246939584, 247070144,
- 247199552, 247331648, 247463872, 247593536, 247726016, 247857088,
- 247987648, 248116928, 248249536, 248380736, 248512064, 248643008,
- 248773312, 248901056, 249036608, 249167552, 249298624, 249429184,
- 249560512, 249692096, 249822784, 249954112, 250085312, 250215488,
- 250345792, 250478528, 250608704, 250739264, 250870976, 251002816,
- 251133632, 251263552, 251395136, 251523904, 251657792, 251789248,
- 251919424, 252051392, 252182464, 252313408, 252444224, 252575552,
- 252706624, 252836032, 252968512, 253099712, 253227584, 253361728,
- 253493056, 253623488, 253754432, 253885504, 254017216, 254148032,
- 254279488, 254410432, 254541376, 254672576, 254803264, 254933824,
- 255065792, 255196736, 255326528, 255458752, 255589952, 255721408,
- 255851072, 255983296, 256114624, 256244416, 256374208, 256507712,
- 256636096, 256768832, 256900544, 257031616, 257162176, 257294272,
- 257424448, 257555776, 257686976, 257818432, 257949632, 258079552,
- 258211136, 258342464, 258473408, 258603712, 258734656, 258867008,
- 258996544, 259127744, 259260224, 259391296, 259522112, 259651904,
- 259784384, 259915328, 260045888, 260175424, 260308544, 260438336,
- 260570944, 260700992, 260832448, 260963776, 261092672, 261226304,
- 261356864, 261487936, 261619648, 261750592, 261879872, 262011968,
- 262143424, 262274752, 262404416, 262537024, 262667968, 262799296,
- 262928704, 263061184, 263191744, 263322944, 263454656, 263585216,
- 263716672, 263847872, 263978944, 264108608, 264241088, 264371648,
- 264501184, 264632768, 264764096, 264895936, 265024576, 265158464,
- 265287488, 265418432, 265550528, 265681216, 265813312, 265943488,
- 266075968, 266206144, 266337728, 266468032, 266600384, 266731072,
- 266862272, 266993344, 267124288, 267255616, 267386432, 267516992,
- 267648704, 267777728, 267910592, 268040512, 268172096, 268302784,
- 268435264, 268566208, 268696256, 268828096, 268959296, 269090368,
- 269221312, 269352256, 269482688, 269614784, 269745856, 269876416,
- 270007616, 270139328, 270270272, 270401216, 270531904, 270663616,
- 270791744, 270924736, 271056832, 271186112, 271317184, 271449536,
- 271580992, 271711936, 271843136, 271973056, 272105408, 272236352,
- 272367296, 272498368, 272629568, 272759488, 272891456, 273022784,
- 273153856, 273284672, 273415616, 273547072, 273677632, 273808448,
- 273937088, 274071488, 274200896, 274332992, 274463296, 274595392,
- 274726208, 274857536, 274988992, 275118656, 275250496, 275382208,
- 275513024, 275643968, 275775296, 275906368, 276037184, 276167872,
- 276297664, 276429376, 276560576, 276692672, 276822976, 276955072,
- 277085632, 277216832, 277347008, 277478848, 277609664, 277740992,
- 277868608, 278002624, 278134336, 278265536, 278395328, 278526784,
- 278657728, 278789824, 278921152, 279052096, 279182912, 279313088,
- 279443776, 279576256, 279706048, 279838528, 279969728, 280099648,
- 280230976, 280361408, 280493632, 280622528, 280755392, 280887104,
- 281018176, 281147968, 281278912, 281411392, 281542592, 281673152,
- 281803712, 281935552, 282066496, 282197312, 282329024, 282458816,
- 282590272, 282720832, 282853184, 282983744, 283115072, 283246144,
- 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" +
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- "849ba6e72e47e2454a44659149338ac0767cd25d8693c0d143e354bd600f1c1d3a44eeb024923ea659060665d5cd9a4ca1ca86162819556535fd59b9fde90caa" +
- "29920efe99479fe7e4b4e5371e13ccb43a1419cf023433239d840900d31bab37fabc3fd20e31bb7dbcb3ae8df66f67e2844944bcf544b658364f9e3d0b6d84b4" +
- "63ad4eb621644fd7d774b501407a1178814b15149345d551b474347188067db2ab4d7f4d1abd3027133039e855e129f3f5649550da8c04fe2db57cb89bf1bf4f" +
- "72eb35ccfe31afb92f6136d4c2a1c115b07b721b2da43151f11c356256230408979c5d95243714429e2c9500e7b043b20dac8a9763e5b487d1cbdb34ac379b9c" +
- "6409454c79385b6e562459c4fdaad1b7f9297c1473e9b90fffe6d1c5390e241a187a4cefa2eb0cb0c11f4ca6c5b961c18ceb57892295290dbc991692556bffa3" +
- "b8c405cf285e6bcb8a90246ad0ac15122f4cf73adc129d23aa2240733404beb6d74bf698e5589288a522573c774ce9f514b5d5c086382ea1dd4e89ff5facbf23" +
- "d36bc3d203941e17747ede4b82820351f4df278ddb787ce8f6f1cc468ef953399efb072ce706e253f1bab76444bb70be6443cd0db633e958dc57bd223e00418e" +
- "915a7c2e4d94c0623f9788276480cdfe798387d35e2ea2d304d066aec7627794cdd4200a44208d6c87f242c76e2d4a3f966b6fb96eaa63d892c1a177bef249b4" +
- "fdd1a4c06c791f677dd9919f739ccf318bd77835330b0219786249c9c9736161dac771a838724f2dd70afba46a6782fd27601cf8a7126ae95a66e526131a68d7" +
- "7a809e513533ed8021eecdbc5851dfcf95e10f1bbe47b5c7f079275a1837836245266b66d89fab25ac4bd6c1225560bea3259b67bf50a58ee056754d574da79e" +
- "f9a1a0df3a5defed0f74fe74ce0bf65a04086f17e94a8451828c723c97932f26f9349f1a2c7866c617a528602721de4f3cc8916bcfc66cdc106bafa26ea87a13" +
- "94dfa37e396365fb7f92df007b46a50ff04c7f85bfa679230ebedf18c2fb876fc7098dd1c4328adf85de71c31d94687a308053bfcdc158cfa7772170fbed63f5" +
- "37dda41f65196dfacdd1186b5de0f3369d841ce6502192292d05a19ce7464f5bcab3015c721cac13ddca561b92dc1ee25d3068dc1945a1b4e2bd1e6604c42e4c" +
- "3c04b490f6365828957990007394557854a903e19feb06906e41cbc8766bf37bd7dece90f4cdc987709b1129e84bfdc502543b5bfa887bf78553a5ec10ad68c5" +
- "d10eff75f7aa495e7d934a55577fdc0aead31aee4522db0259d7d4ea8438a7996d80a787465a2980457193d1c4bf1a0a1e01741d72e5fc4dfe58475c1c01026b" +
- "5a3bc973b902280753e9c3226db9cc778e2506c56ee86ae85b4d54dbf05394107329b2d1ee56522cb1ce562fb1aa4e592199d9c29f64cc3ab1d757531e209eec" +
- "aa138d8388169b5e28c45f5aba267eeaa57f69869f0b6855d82b0eafcde63895251f41e8e676a0ab12ef3f569bb7de91b79fa46ad9637da01ca004f4d30259c1" +
- "f5b00761f6ca9c17721a6718390624a10a11f7f52d7afb71ee5f8338828910e48f94a1347761abac87897b2dd0e23f1d325aec5031ef58f2972e8b402e05f8c1" +
- "ae7053a90380a1ae0d4d06645548c23e13afa31aac8ff83b10f8341418af4114632f6406d6e33076391696c9161d63c8bcfd1c625fc737f68198046212d1638a" +
- "d2d2d42ff7029c1fcc682a046edc4d4f24862d82c600180b1e8f57ff6a3865dfe9274f9886d00efa523a1b3b3757c4489200fec3dc5583854c955492336253dd" +
- "767f2a60ce3d224afcff9cdc19e9b28830d33affda6af99942a8fe39562055f3e884fd6c1ebc1908ac159061f35e9b0da80434ce9673d9c6b87265170077c670" +
- "743e37474d7605cd01c44af600f16d9ffaf24acf87fbe5ccf39bac41047a810d210051c87f06147a0bb8f1427a406700483679638f1af23f1dafb7aa0c468669" +
- "71c3a82f535c26cf6cb335e8e915fda393799d3dbe0e04b907ed3612d12ac95783a6876cd986d2a13b82192532e02c250eaa42f891d2481655fa4494c723fe00" +
- "87d224444245eb5b0eade5f741b025db1992a8ad0dce51b0c1af4a18a9e244f9f755891adf0f19179c7baa6c32bffc91e0b03c4ed3aaee1978b6a1f03b87ac6a" +
- "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)
- }
-}