diff --git a/accounts/abi/bind/backends/simulated.go b/accounts/abi/bind/backends/simulated.go
index e21ffe1f8bb440f909ccb281df98e6932ddce0c9..2e6796de6041090ba76c8cabd4325a5cb8917a9b 100644
--- a/accounts/abi/bind/backends/simulated.go
+++ b/accounts/abi/bind/backends/simulated.go
@@ -33,6 +33,7 @@ import (
"github.com/ethereum/go-ethereum/ethdb"
"github.com/ethereum/go-ethereum/event"
"github.com/ethereum/go-ethereum/params"
+ "github.com/ethereum/go-ethereum/pow"
"golang.org/x/net/context"
)
@@ -62,7 +63,7 @@ type SimulatedBackend struct {
func NewSimulatedBackend(accounts ...core.GenesisAccount) *SimulatedBackend {
database, _ := ethdb.NewMemDatabase()
core.WriteGenesisBlockForTesting(database, accounts...)
- blockchain, _ := core.NewBlockChain(database, chainConfig, new(core.FakePow), new(event.TypeMux), vm.Config{})
+ blockchain, _ := core.NewBlockChain(database, chainConfig, new(pow.FakePow), new(event.TypeMux), vm.Config{})
backend := &SimulatedBackend{database: database, blockchain: blockchain}
backend.rollback()
return backend
diff --git a/cmd/utils/flags.go b/cmd/utils/flags.go
index 04db9a16f39979871aac027e106c796084d37531..00599e82a4d7ea6c7ffff6c7bb5bc6eb1f2c4bed 100644
--- a/cmd/utils/flags.go
+++ b/cmd/utils/flags.go
@@ -28,7 +28,6 @@ import (
"strconv"
"strings"
- "github.com/ethereum/ethash"
"github.com/ethereum/go-ethereum/accounts"
"github.com/ethereum/go-ethereum/accounts/keystore"
"github.com/ethereum/go-ethereum/common"
@@ -922,11 +921,11 @@ func MakeChain(ctx *cli.Context, stack *node.Node) (chain *core.BlockChain, chai
}
chainConfig := MakeChainConfigFromDb(ctx, chainDb)
- pow := pow.PoW(core.FakePow{})
+ seal := pow.PoW(pow.FakePow{})
if !ctx.GlobalBool(FakePoWFlag.Name) {
- pow = ethash.New()
+ seal = pow.NewFullEthash("", "")
}
- chain, err = core.NewBlockChain(chainDb, chainConfig, pow, new(event.TypeMux), vm.Config{EnablePreimageRecording: ctx.GlobalBool(VMEnableDebugFlag.Name)})
+ chain, err = core.NewBlockChain(chainDb, chainConfig, seal, new(event.TypeMux), vm.Config{EnablePreimageRecording: ctx.GlobalBool(VMEnableDebugFlag.Name)})
if err != nil {
Fatalf("Could not start chainmanager: %v", err)
}
diff --git a/core/bench_test.go b/core/bench_test.go
index 8a160055795e9e7d5774f86c55f2f606aebf733f..42d50a7b12c11d4a14c83bf5d512b0d8f50b060b 100644
--- a/core/bench_test.go
+++ b/core/bench_test.go
@@ -31,6 +31,7 @@ import (
"github.com/ethereum/go-ethereum/ethdb"
"github.com/ethereum/go-ethereum/event"
"github.com/ethereum/go-ethereum/params"
+ "github.com/ethereum/go-ethereum/pow"
)
func BenchmarkInsertChain_empty_memdb(b *testing.B) {
@@ -171,7 +172,7 @@ func benchInsertChain(b *testing.B, disk bool, gen func(int, *BlockGen)) {
// Time the insertion of the new chain.
// State and blocks are stored in the same DB.
evmux := new(event.TypeMux)
- chainman, _ := NewBlockChain(db, ¶ms.ChainConfig{HomesteadBlock: new(big.Int)}, FakePow{}, evmux, vm.Config{})
+ chainman, _ := NewBlockChain(db, ¶ms.ChainConfig{HomesteadBlock: new(big.Int)}, pow.FakePow{}, evmux, vm.Config{})
defer chainman.Stop()
b.ReportAllocs()
b.ResetTimer()
@@ -281,7 +282,7 @@ func benchReadChain(b *testing.B, full bool, count uint64) {
if err != nil {
b.Fatalf("error opening database at %v: %v", dir, err)
}
- chain, err := NewBlockChain(db, testChainConfig(), FakePow{}, new(event.TypeMux), vm.Config{})
+ chain, err := NewBlockChain(db, testChainConfig(), pow.FakePow{}, new(event.TypeMux), vm.Config{})
if err != nil {
b.Fatalf("error creating chain: %v", err)
}
diff --git a/core/block_validator.go b/core/block_validator.go
index ed5cc3ab6fb89a7e82d9c64d5a38b43fff2d3693..f93a9f40ba56b1f56d93611dbcdec7c149c6c333 100644
--- a/core/block_validator.go
+++ b/core/block_validator.go
@@ -244,7 +244,7 @@ func ValidateHeader(config *params.ChainConfig, pow pow.PoW, header *types.Heade
if checkPow {
// Verify the nonce of the header. Return an error if it's not valid
- if !pow.Verify(types.NewBlockWithHeader(header)) {
+ if err := pow.Verify(types.NewBlockWithHeader(header)); err != nil {
return &BlockNonceErr{header.Number, header.Hash(), header.Nonce.Uint64()}
}
}
diff --git a/core/block_validator_test.go b/core/block_validator_test.go
index 01931efd2470db911c5f9bf8d4e16f74b799f2c7..c13aa83db23991bb91dc8002472b771984a3f41f 100644
--- a/core/block_validator_test.go
+++ b/core/block_validator_test.go
@@ -28,6 +28,7 @@ import (
"github.com/ethereum/go-ethereum/ethdb"
"github.com/ethereum/go-ethereum/event"
"github.com/ethereum/go-ethereum/params"
+ "github.com/ethereum/go-ethereum/pow"
)
func testChainConfig() *params.ChainConfig {
@@ -40,7 +41,7 @@ func proc() (Validator, *BlockChain) {
var mux event.TypeMux
WriteTestNetGenesisBlock(db)
- blockchain, err := NewBlockChain(db, testChainConfig(), thePow(), &mux, vm.Config{})
+ blockchain, err := NewBlockChain(db, testChainConfig(), pow.NewTestEthash(), &mux, vm.Config{})
if err != nil {
fmt.Println(err)
}
@@ -54,13 +55,13 @@ func TestNumber(t *testing.T) {
cfg := testChainConfig()
header := makeHeader(cfg, chain.Genesis(), statedb)
header.Number = big.NewInt(3)
- err := ValidateHeader(cfg, FakePow{}, header, chain.Genesis().Header(), false, false)
+ err := ValidateHeader(cfg, pow.FakePow{}, header, chain.Genesis().Header(), false, false)
if err != BlockNumberErr {
t.Errorf("expected block number error, got %q", err)
}
header = makeHeader(cfg, chain.Genesis(), statedb)
- err = ValidateHeader(cfg, FakePow{}, header, chain.Genesis().Header(), false, false)
+ err = ValidateHeader(cfg, pow.FakePow{}, header, chain.Genesis().Header(), false, false)
if err == BlockNumberErr {
t.Errorf("didn't expect block number error")
}
diff --git a/core/blockchain.go b/core/blockchain.go
index 0c752b3f923bdb95ea1b0aafe0864d817f9eef2f..765a4b318f183a72f6bcfb1ebb1922d7b92d50e6 100644
--- a/core/blockchain.go
+++ b/core/blockchain.go
@@ -223,6 +223,9 @@ func (self *BlockChain) loadLastState() error {
log.Info("Loaded most recent local full block", "number", self.currentBlock.Number(), "hash", self.currentBlock.Hash(), "td", blockTd)
log.Info("Loaded most recent local fast block", "number", self.currentFastBlock.Number(), "hash", self.currentFastBlock.Hash(), "td", fastTd)
+ // Try to be smart and issue a pow verification for the head to pre-generate caches
+ go self.pow.Verify(types.NewBlockWithHeader(currentHeader))
+
return nil
}
diff --git a/core/blockchain_test.go b/core/blockchain_test.go
index 99b155620b991423d7758f1a48dcd1bc07c81cbd..2f06f0735bfdc66dc2d8d299324d4b447ba1e55c 100644
--- a/core/blockchain_test.go
+++ b/core/blockchain_test.go
@@ -27,7 +27,6 @@ import (
"testing"
"time"
- "github.com/ethereum/ethash"
"github.com/ethereum/go-ethereum/common"
"github.com/ethereum/go-ethereum/core/state"
"github.com/ethereum/go-ethereum/core/types"
@@ -45,15 +44,10 @@ func init() {
runtime.GOMAXPROCS(runtime.NumCPU())
}
-func thePow() pow.PoW {
- pow, _ := ethash.NewForTesting()
- return pow
-}
-
func theBlockChain(db ethdb.Database, t *testing.T) *BlockChain {
var eventMux event.TypeMux
WriteTestNetGenesisBlock(db)
- blockchain, err := NewBlockChain(db, testChainConfig(), thePow(), &eventMux, vm.Config{})
+ blockchain, err := NewBlockChain(db, testChainConfig(), pow.NewTestEthash(), &eventMux, vm.Config{})
if err != nil {
t.Error("failed creating blockchain:", err)
t.FailNow()
@@ -476,7 +470,7 @@ func chm(genesis *types.Block, db ethdb.Database) *BlockChain {
chainDb: db,
genesisBlock: genesis,
eventMux: &eventMux,
- pow: FakePow{},
+ pow: pow.FakePow{},
config: testChainConfig(),
}
valFn := func() HeaderValidator { return bc.Validator() }
@@ -615,7 +609,7 @@ func testReorgBadHashes(t *testing.T, full bool) {
defer func() { delete(BadHashes, headers[3].Hash()) }()
}
// Create a new chain manager and check it rolled back the state
- ncm, err := NewBlockChain(db, testChainConfig(), FakePow{}, new(event.TypeMux), vm.Config{})
+ ncm, err := NewBlockChain(db, testChainConfig(), pow.FakePow{}, new(event.TypeMux), vm.Config{})
if err != nil {
t.Fatalf("failed to create new chain manager: %v", err)
}
@@ -736,7 +730,7 @@ func TestFastVsFullChains(t *testing.T) {
archiveDb, _ := ethdb.NewMemDatabase()
WriteGenesisBlockForTesting(archiveDb, GenesisAccount{address, funds})
- archive, _ := NewBlockChain(archiveDb, testChainConfig(), FakePow{}, new(event.TypeMux), vm.Config{})
+ archive, _ := NewBlockChain(archiveDb, testChainConfig(), pow.FakePow{}, new(event.TypeMux), vm.Config{})
if n, err := archive.InsertChain(blocks); err != nil {
t.Fatalf("failed to process block %d: %v", n, err)
@@ -744,7 +738,7 @@ func TestFastVsFullChains(t *testing.T) {
// Fast import the chain as a non-archive node to test
fastDb, _ := ethdb.NewMemDatabase()
WriteGenesisBlockForTesting(fastDb, GenesisAccount{address, funds})
- fast, _ := NewBlockChain(fastDb, testChainConfig(), FakePow{}, new(event.TypeMux), vm.Config{})
+ fast, _ := NewBlockChain(fastDb, testChainConfig(), pow.FakePow{}, new(event.TypeMux), vm.Config{})
headers := make([]*types.Header, len(blocks))
for i, block := range blocks {
@@ -820,7 +814,7 @@ func TestLightVsFastVsFullChainHeads(t *testing.T) {
archiveDb, _ := ethdb.NewMemDatabase()
WriteGenesisBlockForTesting(archiveDb, GenesisAccount{address, funds})
- archive, _ := NewBlockChain(archiveDb, testChainConfig(), FakePow{}, new(event.TypeMux), vm.Config{})
+ archive, _ := NewBlockChain(archiveDb, testChainConfig(), pow.FakePow{}, new(event.TypeMux), vm.Config{})
if n, err := archive.InsertChain(blocks); err != nil {
t.Fatalf("failed to process block %d: %v", n, err)
@@ -832,7 +826,7 @@ func TestLightVsFastVsFullChainHeads(t *testing.T) {
// Import the chain as a non-archive node and ensure all pointers are updated
fastDb, _ := ethdb.NewMemDatabase()
WriteGenesisBlockForTesting(fastDb, GenesisAccount{address, funds})
- fast, _ := NewBlockChain(fastDb, testChainConfig(), FakePow{}, new(event.TypeMux), vm.Config{})
+ fast, _ := NewBlockChain(fastDb, testChainConfig(), pow.FakePow{}, new(event.TypeMux), vm.Config{})
headers := make([]*types.Header, len(blocks))
for i, block := range blocks {
@@ -851,7 +845,7 @@ func TestLightVsFastVsFullChainHeads(t *testing.T) {
// Import the chain as a light node and ensure all pointers are updated
lightDb, _ := ethdb.NewMemDatabase()
WriteGenesisBlockForTesting(lightDb, GenesisAccount{address, funds})
- light, _ := NewBlockChain(lightDb, testChainConfig(), FakePow{}, new(event.TypeMux), vm.Config{})
+ light, _ := NewBlockChain(lightDb, testChainConfig(), pow.FakePow{}, new(event.TypeMux), vm.Config{})
if n, err := light.InsertHeaderChain(headers, 1); err != nil {
t.Fatalf("failed to insert header %d: %v", n, err)
@@ -917,7 +911,7 @@ func TestChainTxReorgs(t *testing.T) {
})
// Import the chain. This runs all block validation rules.
evmux := &event.TypeMux{}
- blockchain, _ := NewBlockChain(db, testChainConfig(), FakePow{}, evmux, vm.Config{})
+ blockchain, _ := NewBlockChain(db, testChainConfig(), pow.FakePow{}, evmux, vm.Config{})
if i, err := blockchain.InsertChain(chain); err != nil {
t.Fatalf("failed to insert original chain[%d]: %v", i, err)
}
@@ -991,7 +985,7 @@ func TestLogReorgs(t *testing.T) {
)
evmux := &event.TypeMux{}
- blockchain, _ := NewBlockChain(db, testChainConfig(), FakePow{}, evmux, vm.Config{})
+ blockchain, _ := NewBlockChain(db, testChainConfig(), pow.FakePow{}, evmux, vm.Config{})
subs := evmux.Subscribe(RemovedLogsEvent{})
chain, _ := GenerateChain(params.TestChainConfig, genesis, db, 2, func(i int, gen *BlockGen) {
@@ -1028,7 +1022,7 @@ func TestReorgSideEvent(t *testing.T) {
)
evmux := &event.TypeMux{}
- blockchain, _ := NewBlockChain(db, testChainConfig(), FakePow{}, evmux, vm.Config{})
+ blockchain, _ := NewBlockChain(db, testChainConfig(), pow.FakePow{}, evmux, vm.Config{})
chain, _ := GenerateChain(params.TestChainConfig, genesis, db, 3, func(i int, gen *BlockGen) {})
if _, err := blockchain.InsertChain(chain); err != nil {
@@ -1104,7 +1098,7 @@ func TestCanonicalBlockRetrieval(t *testing.T) {
)
evmux := &event.TypeMux{}
- blockchain, _ := NewBlockChain(db, testChainConfig(), FakePow{}, evmux, vm.Config{})
+ blockchain, _ := NewBlockChain(db, testChainConfig(), pow.FakePow{}, evmux, vm.Config{})
chain, _ := GenerateChain(params.TestChainConfig, genesis, db, 10, func(i int, gen *BlockGen) {})
@@ -1147,7 +1141,7 @@ func TestEIP155Transition(t *testing.T) {
mux event.TypeMux
)
- blockchain, _ := NewBlockChain(db, config, FakePow{}, &mux, vm.Config{})
+ blockchain, _ := NewBlockChain(db, config, pow.FakePow{}, &mux, vm.Config{})
blocks, _ := GenerateChain(config, genesis, db, 4, func(i int, block *BlockGen) {
var (
tx *types.Transaction
@@ -1251,7 +1245,7 @@ func TestEIP161AccountRemoval(t *testing.T) {
}
mux event.TypeMux
- blockchain, _ = NewBlockChain(db, config, FakePow{}, &mux, vm.Config{})
+ blockchain, _ = NewBlockChain(db, config, pow.FakePow{}, &mux, vm.Config{})
)
blocks, _ := GenerateChain(config, genesis, db, 3, func(i int, block *BlockGen) {
var (
diff --git a/core/chain_makers.go b/core/chain_makers.go
index 8b3b015a8c2f9d698aa8f982a85e9980331e3672..f63496fdc3fb23006f0f77a5bc98474f00064db0 100644
--- a/core/chain_makers.go
+++ b/core/chain_makers.go
@@ -43,17 +43,6 @@ func MakeChainConfig() *params.ChainConfig {
}
}
-// FakePow is a non-validating proof of work implementation.
-// It returns true from Verify for any block.
-type FakePow struct{}
-
-func (f FakePow) Search(block pow.Block, stop <-chan struct{}, index int) (uint64, []byte) {
- return 0, nil
-}
-func (f FakePow) Verify(block pow.Block) bool { return true }
-func (f FakePow) GetHashrate() int64 { return 0 }
-func (f FakePow) Turbo(bool) {}
-
// So we can deterministically seed different blockchains
var (
canonicalSeed = 1
@@ -256,7 +245,7 @@ func newCanonical(n int, full bool) (ethdb.Database, *BlockChain, error) {
// Initialize a fresh chain with only a genesis block
genesis, _ := WriteTestNetGenesisBlock(db)
- blockchain, _ := NewBlockChain(db, MakeChainConfig(), FakePow{}, evmux, vm.Config{})
+ blockchain, _ := NewBlockChain(db, MakeChainConfig(), pow.FakePow{}, evmux, vm.Config{})
// Create and inject the requested chain
if n == 0 {
return db, blockchain, nil
diff --git a/core/chain_makers_test.go b/core/chain_makers_test.go
index 5c563de4690a4856d31e47062fa0bea84b2418d8..82751553ff80b95f50f0f658ad4684f66a9a8919 100644
--- a/core/chain_makers_test.go
+++ b/core/chain_makers_test.go
@@ -26,6 +26,7 @@ import (
"github.com/ethereum/go-ethereum/ethdb"
"github.com/ethereum/go-ethereum/event"
"github.com/ethereum/go-ethereum/params"
+ "github.com/ethereum/go-ethereum/pow"
)
func ExampleGenerateChain() {
@@ -82,7 +83,7 @@ func ExampleGenerateChain() {
// Import the chain. This runs all block validation rules.
evmux := &event.TypeMux{}
- blockchain, _ := NewBlockChain(db, chainConfig, FakePow{}, evmux, vm.Config{})
+ blockchain, _ := NewBlockChain(db, chainConfig, pow.FakePow{}, evmux, vm.Config{})
if i, err := blockchain.InsertChain(chain); err != nil {
fmt.Printf("insert error (block %d): %v\n", chain[i].NumberU64(), err)
return
diff --git a/core/chain_pow.go b/core/chain_pow.go
index c3b5788c19a9fa023b9358c1d7b410f401fc6391..e5ccd87e2090f82093ae9050f65b4491fa663c51 100644
--- a/core/chain_pow.go
+++ b/core/chain_pow.go
@@ -65,7 +65,7 @@ func verifyNonces(checker pow.PoW, items []pow.Block) (chan<- struct{}, <-chan n
for i := 0; i < workers; i++ {
go func() {
for index := range tasks {
- results <- nonceCheckResult{index: index, valid: checker.Verify(items[index])}
+ results <- nonceCheckResult{index: index, valid: checker.Verify(items[index]) == nil}
}
}()
}
diff --git a/core/chain_pow_test.go b/core/chain_pow_test.go
index 1400b166f008c225db31e1a8f57f7b0457bb7b5c..311ca128e677c2e2f1c11012cf29e54edd07284d 100644
--- a/core/chain_pow_test.go
+++ b/core/chain_pow_test.go
@@ -17,6 +17,7 @@
package core
import (
+ "errors"
"math/big"
"runtime"
"testing"
@@ -35,12 +36,16 @@ type failPow struct {
failing uint64
}
-func (pow failPow) Search(pow.Block, <-chan struct{}, int) (uint64, []byte) {
+func (pow failPow) Search(pow.Block, <-chan struct{}) (uint64, []byte) {
return 0, nil
}
-func (pow failPow) Verify(block pow.Block) bool { return block.NumberU64() != pow.failing }
-func (pow failPow) GetHashrate() int64 { return 0 }
-func (pow failPow) Turbo(bool) {}
+func (pow failPow) Verify(block pow.Block) error {
+ if block.NumberU64() == pow.failing {
+ return errors.New("failed")
+ }
+ return nil
+}
+func (pow failPow) Hashrate() float64 { return 0 }
// delayedPow is a non-validating proof of work implementation, that returns true
// from Verify for all blocks, but delays them the configured amount of time.
@@ -48,12 +53,11 @@ type delayedPow struct {
delay time.Duration
}
-func (pow delayedPow) Search(pow.Block, <-chan struct{}, int) (uint64, []byte) {
+func (pow delayedPow) Search(pow.Block, <-chan struct{}) (uint64, []byte) {
return 0, nil
}
-func (pow delayedPow) Verify(block pow.Block) bool { time.Sleep(pow.delay); return true }
-func (pow delayedPow) GetHashrate() int64 { return 0 }
-func (pow delayedPow) Turbo(bool) {}
+func (pow delayedPow) Verify(block pow.Block) error { time.Sleep(pow.delay); return nil }
+func (pow delayedPow) Hashrate() float64 { return 0 }
// Tests that simple POW verification works, for both good and bad blocks.
func TestPowVerification(t *testing.T) {
@@ -75,11 +79,11 @@ func TestPowVerification(t *testing.T) {
switch {
case full && valid:
- _, results = verifyNoncesFromBlocks(FakePow{}, []*types.Block{blocks[i]})
+ _, results = verifyNoncesFromBlocks(pow.FakePow{}, []*types.Block{blocks[i]})
case full && !valid:
_, results = verifyNoncesFromBlocks(failPow{blocks[i].NumberU64()}, []*types.Block{blocks[i]})
case !full && valid:
- _, results = verifyNoncesFromHeaders(FakePow{}, []*types.Header{headers[i]})
+ _, results = verifyNoncesFromHeaders(pow.FakePow{}, []*types.Header{headers[i]})
case !full && !valid:
_, results = verifyNoncesFromHeaders(failPow{headers[i].Number.Uint64()}, []*types.Header{headers[i]})
}
@@ -134,11 +138,11 @@ func testPowConcurrentVerification(t *testing.T, threads int) {
switch {
case full && valid:
- _, results = verifyNoncesFromBlocks(FakePow{}, blocks)
+ _, results = verifyNoncesFromBlocks(pow.FakePow{}, blocks)
case full && !valid:
_, results = verifyNoncesFromBlocks(failPow{uint64(len(blocks) - 1)}, blocks)
case !full && valid:
- _, results = verifyNoncesFromHeaders(FakePow{}, headers)
+ _, results = verifyNoncesFromHeaders(pow.FakePow{}, headers)
case !full && !valid:
_, results = verifyNoncesFromHeaders(failPow{uint64(len(headers) - 1)}, headers)
}
diff --git a/core/dao_test.go b/core/dao_test.go
index b8b4c71cfaf43ebc7c53ba61543e0a17a28bccf6..45b3235c71bb3eea08747537aead3cc1ec5f6770 100644
--- a/core/dao_test.go
+++ b/core/dao_test.go
@@ -24,6 +24,7 @@ import (
"github.com/ethereum/go-ethereum/ethdb"
"github.com/ethereum/go-ethereum/event"
"github.com/ethereum/go-ethereum/params"
+ "github.com/ethereum/go-ethereum/pow"
)
// Tests that DAO-fork enabled clients can properly filter out fork-commencing
@@ -40,12 +41,12 @@ func TestDAOForkRangeExtradata(t *testing.T) {
proDb, _ := ethdb.NewMemDatabase()
WriteGenesisBlockForTesting(proDb)
proConf := ¶ms.ChainConfig{HomesteadBlock: big.NewInt(0), DAOForkBlock: forkBlock, DAOForkSupport: true}
- proBc, _ := NewBlockChain(proDb, proConf, new(FakePow), new(event.TypeMux), vm.Config{})
+ proBc, _ := NewBlockChain(proDb, proConf, new(pow.FakePow), new(event.TypeMux), vm.Config{})
conDb, _ := ethdb.NewMemDatabase()
WriteGenesisBlockForTesting(conDb)
conConf := ¶ms.ChainConfig{HomesteadBlock: big.NewInt(0), DAOForkBlock: forkBlock, DAOForkSupport: false}
- conBc, _ := NewBlockChain(conDb, conConf, new(FakePow), new(event.TypeMux), vm.Config{})
+ conBc, _ := NewBlockChain(conDb, conConf, new(pow.FakePow), new(event.TypeMux), vm.Config{})
if _, err := proBc.InsertChain(prefix); err != nil {
t.Fatalf("pro-fork: failed to import chain prefix: %v", err)
@@ -58,7 +59,7 @@ func TestDAOForkRangeExtradata(t *testing.T) {
// Create a pro-fork block, and try to feed into the no-fork chain
db, _ = ethdb.NewMemDatabase()
WriteGenesisBlockForTesting(db)
- bc, _ := NewBlockChain(db, conConf, new(FakePow), new(event.TypeMux), vm.Config{})
+ bc, _ := NewBlockChain(db, conConf, new(pow.FakePow), new(event.TypeMux), vm.Config{})
blocks := conBc.GetBlocksFromHash(conBc.CurrentBlock().Hash(), int(conBc.CurrentBlock().NumberU64()+1))
for j := 0; j < len(blocks)/2; j++ {
@@ -79,7 +80,7 @@ func TestDAOForkRangeExtradata(t *testing.T) {
// Create a no-fork block, and try to feed into the pro-fork chain
db, _ = ethdb.NewMemDatabase()
WriteGenesisBlockForTesting(db)
- bc, _ = NewBlockChain(db, proConf, new(FakePow), new(event.TypeMux), vm.Config{})
+ bc, _ = NewBlockChain(db, proConf, new(pow.FakePow), new(event.TypeMux), vm.Config{})
blocks = proBc.GetBlocksFromHash(proBc.CurrentBlock().Hash(), int(proBc.CurrentBlock().NumberU64()+1))
for j := 0; j < len(blocks)/2; j++ {
@@ -101,7 +102,7 @@ func TestDAOForkRangeExtradata(t *testing.T) {
// Verify that contra-forkers accept pro-fork extra-datas after forking finishes
db, _ = ethdb.NewMemDatabase()
WriteGenesisBlockForTesting(db)
- bc, _ := NewBlockChain(db, conConf, new(FakePow), new(event.TypeMux), vm.Config{})
+ bc, _ := NewBlockChain(db, conConf, new(pow.FakePow), new(event.TypeMux), vm.Config{})
blocks := conBc.GetBlocksFromHash(conBc.CurrentBlock().Hash(), int(conBc.CurrentBlock().NumberU64()+1))
for j := 0; j < len(blocks)/2; j++ {
@@ -117,7 +118,7 @@ func TestDAOForkRangeExtradata(t *testing.T) {
// Verify that pro-forkers accept contra-fork extra-datas after forking finishes
db, _ = ethdb.NewMemDatabase()
WriteGenesisBlockForTesting(db)
- bc, _ = NewBlockChain(db, proConf, new(FakePow), new(event.TypeMux), vm.Config{})
+ bc, _ = NewBlockChain(db, proConf, new(pow.FakePow), new(event.TypeMux), vm.Config{})
blocks = proBc.GetBlocksFromHash(proBc.CurrentBlock().Hash(), int(proBc.CurrentBlock().NumberU64()+1))
for j := 0; j < len(blocks)/2; j++ {
diff --git a/eth/backend.go b/eth/backend.go
index 5a8b41f5d2b0df3ae5b3869feeb67a8c16c5330a..024520b13030a9c70e0dacf9189605f642529f25 100644
--- a/eth/backend.go
+++ b/eth/backend.go
@@ -288,15 +288,15 @@ func CreatePoW(config *Config) (pow.PoW, error) {
switch {
case config.PowFake:
log.Warn("Ethash used in fake mode")
- return pow.PoW(core.FakePow{}), nil
+ return pow.FakePow{}, nil
case config.PowTest:
log.Warn("Ethash used in test mode")
- return ethash.NewForTesting()
+ return pow.NewTestEthash(), nil
case config.PowShared:
log.Warn("Ethash used in shared mode")
- return ethash.NewShared(), nil
+ return pow.NewSharedEthash(), nil
default:
- return ethash.New(), nil
+ return pow.NewFullEthash("", ""), nil
}
}
diff --git a/eth/handler_test.go b/eth/handler_test.go
index 03d5404a4d71a609a523fcd096a238e735f03de2..683c8f71e7501e8aea1123c108a020557b8559c8 100644
--- a/eth/handler_test.go
+++ b/eth/handler_test.go
@@ -34,6 +34,7 @@ import (
"github.com/ethereum/go-ethereum/event"
"github.com/ethereum/go-ethereum/p2p"
"github.com/ethereum/go-ethereum/params"
+ "github.com/ethereum/go-ethereum/pow"
)
var bigTxGas = new(big.Int).SetUint64(params.TxGas)
@@ -468,7 +469,7 @@ func testDAOChallenge(t *testing.T, localForked, remoteForked bool, timeout bool
// Create a DAO aware protocol manager
var (
evmux = new(event.TypeMux)
- pow = new(core.FakePow)
+ pow = new(pow.FakePow)
db, _ = ethdb.NewMemDatabase()
genesis = core.WriteGenesisBlockForTesting(db)
config = ¶ms.ChainConfig{DAOForkBlock: big.NewInt(1), DAOForkSupport: localForked}
diff --git a/eth/helper_test.go b/eth/helper_test.go
index 0861c884bdb837d10926e04d45c1ba04989c8740..3ad31394aa9d67f85cc593aaf69b1831a299ec78 100644
--- a/eth/helper_test.go
+++ b/eth/helper_test.go
@@ -37,6 +37,7 @@ import (
"github.com/ethereum/go-ethereum/p2p"
"github.com/ethereum/go-ethereum/p2p/discover"
"github.com/ethereum/go-ethereum/params"
+ "github.com/ethereum/go-ethereum/pow"
)
var (
@@ -53,7 +54,7 @@ var (
func newTestProtocolManager(fastSync bool, blocks int, generator func(int, *core.BlockGen), newtx chan<- []*types.Transaction) (*ProtocolManager, error) {
var (
evmux = new(event.TypeMux)
- pow = new(core.FakePow)
+ pow = new(pow.FakePow)
db, _ = ethdb.NewMemDatabase()
genesis = core.WriteGenesisBlockForTesting(db, testBank)
chainConfig = ¶ms.ChainConfig{HomesteadBlock: big.NewInt(0)} // homestead set to 0 because of chain maker
diff --git a/internal/ethapi/api.go b/internal/ethapi/api.go
index caa7421807fe36ca9b417e9602a8e7b9d8d5f0b8..c8374fe18e51d68379e59185f7115ffde471a2ee 100644
--- a/internal/ethapi/api.go
+++ b/internal/ethapi/api.go
@@ -25,7 +25,6 @@ import (
"strings"
"time"
- "github.com/ethereum/ethash"
"github.com/ethereum/go-ethereum/accounts"
"github.com/ethereum/go-ethereum/accounts/keystore"
"github.com/ethereum/go-ethereum/common"
@@ -39,6 +38,7 @@ import (
"github.com/ethereum/go-ethereum/log"
"github.com/ethereum/go-ethereum/p2p"
"github.com/ethereum/go-ethereum/params"
+ "github.com/ethereum/go-ethereum/pow"
"github.com/ethereum/go-ethereum/rlp"
"github.com/ethereum/go-ethereum/rpc"
"github.com/syndtr/goleveldb/leveldb"
@@ -1378,11 +1378,7 @@ func (api *PublicDebugAPI) SeedHash(ctx context.Context, number uint64) (string,
if block == nil {
return "", fmt.Errorf("block #%d not found", number)
}
- hash, err := ethash.GetSeedHash(number)
- if err != nil {
- return "", err
- }
- return fmt.Sprintf("0x%x", hash), nil
+ return fmt.Sprintf("0x%x", pow.EthashSeedHash(number)), nil
}
// PrivateDebugAPI is the collection of Etheruem APIs exposed over the private
diff --git a/les/helper_test.go b/les/helper_test.go
index 2c6f34a92eb284ac4d66bb63d5f10f781253a370..f6293ad1a5a315f100916de4c28c5d0522a54fca 100644
--- a/les/helper_test.go
+++ b/les/helper_test.go
@@ -39,6 +39,7 @@ import (
"github.com/ethereum/go-ethereum/p2p"
"github.com/ethereum/go-ethereum/p2p/discover"
"github.com/ethereum/go-ethereum/params"
+ "github.com/ethereum/go-ethereum/pow"
)
var (
@@ -134,7 +135,7 @@ func testRCL() RequestCostList {
func newTestProtocolManager(lightSync bool, blocks int, generator func(int, *core.BlockGen)) (*ProtocolManager, ethdb.Database, *LesOdr, error) {
var (
evmux = new(event.TypeMux)
- pow = new(core.FakePow)
+ pow = new(pow.FakePow)
db, _ = ethdb.NewMemDatabase()
genesis = core.WriteGenesisBlockForTesting(db, core.GenesisAccount{Address: testBankAddress, Balance: testBankFunds})
chainConfig = ¶ms.ChainConfig{HomesteadBlock: big.NewInt(0)} // homestead set to 0 because of chain maker
diff --git a/light/lightchain.go b/light/lightchain.go
index 773c0f38be77b86f23d5540c555717bac8800a6e..a45022e8159c4f61ead3c134d432a3e0d36f8ba8 100644
--- a/light/lightchain.go
+++ b/light/lightchain.go
@@ -169,6 +169,9 @@ func (self *LightChain) loadLastState() error {
headerTd := self.GetTd(header.Hash(), header.Number.Uint64())
log.Info("Loaded most recent local header", "number", header.Number, "hash", header.Hash(), "td", headerTd)
+ // Try to be smart and issue a pow verification for the head to pre-generate caches
+ go self.pow.Verify(types.NewBlockWithHeader(header))
+
return nil
}
diff --git a/light/lightchain_test.go b/light/lightchain_test.go
index 0ba92588739cd79af2725eff65f237406c8f702f..8a99c69f13911f11af762960da8cbb7e333d0bc8 100644
--- a/light/lightchain_test.go
+++ b/light/lightchain_test.go
@@ -22,7 +22,6 @@ import (
"runtime"
"testing"
- "github.com/ethereum/ethash"
"github.com/ethereum/go-ethereum/common"
"github.com/ethereum/go-ethereum/core"
"github.com/ethereum/go-ethereum/core/types"
@@ -67,7 +66,7 @@ func newCanonical(n int) (ethdb.Database, *LightChain, error) {
// Initialize a fresh chain with only a genesis block
genesis, _ := core.WriteTestNetGenesisBlock(db)
- blockchain, _ := NewLightChain(&dummyOdr{db: db}, testChainConfig(), core.FakePow{}, evmux)
+ blockchain, _ := NewLightChain(&dummyOdr{db: db}, testChainConfig(), pow.FakePow{}, evmux)
// Create and inject the requested chain
if n == 0 {
return db, blockchain, nil
@@ -82,15 +81,10 @@ func init() {
runtime.GOMAXPROCS(runtime.NumCPU())
}
-func thePow() pow.PoW {
- pow, _ := ethash.NewForTesting()
- return pow
-}
-
func theLightChain(db ethdb.Database, t *testing.T) *LightChain {
var eventMux event.TypeMux
core.WriteTestNetGenesisBlock(db)
- LightChain, err := NewLightChain(&dummyOdr{db: db}, testChainConfig(), thePow(), &eventMux)
+ LightChain, err := NewLightChain(&dummyOdr{db: db}, testChainConfig(), pow.NewTestEthash(), &eventMux)
if err != nil {
t.Error("failed creating LightChain:", err)
t.FailNow()
@@ -311,7 +305,7 @@ func (odr *dummyOdr) Retrieve(ctx context.Context, req OdrRequest) error {
func chm(genesis *types.Block, db ethdb.Database) *LightChain {
odr := &dummyOdr{db: db}
var eventMux event.TypeMux
- bc := &LightChain{odr: odr, chainDb: db, genesisBlock: genesis, eventMux: &eventMux, pow: core.FakePow{}}
+ bc := &LightChain{odr: odr, chainDb: db, genesisBlock: genesis, eventMux: &eventMux, pow: pow.FakePow{}}
bc.hc, _ = core.NewHeaderChain(db, testChainConfig(), bc.Validator, bc.getProcInterrupt)
bc.bodyCache, _ = lru.New(100)
bc.bodyRLPCache, _ = lru.New(100)
@@ -394,7 +388,7 @@ func TestReorgBadHeaderHashes(t *testing.T) {
core.BadHashes[headers[3].Hash()] = true
defer func() { delete(core.BadHashes, headers[3].Hash()) }()
// Create a new chain manager and check it rolled back the state
- ncm, err := NewLightChain(&dummyOdr{db: db}, testChainConfig(), core.FakePow{}, new(event.TypeMux))
+ ncm, err := NewLightChain(&dummyOdr{db: db}, testChainConfig(), pow.FakePow{}, new(event.TypeMux))
if err != nil {
t.Fatalf("failed to create new chain manager: %v", err)
}
diff --git a/light/odr_test.go b/light/odr_test.go
index 6987db6440a0f8c7853d7d28c094e8edd1b2e7f7..e2eced34698b79eb6759ad330477738150a0b6df 100644
--- a/light/odr_test.go
+++ b/light/odr_test.go
@@ -33,6 +33,7 @@ import (
"github.com/ethereum/go-ethereum/ethdb"
"github.com/ethereum/go-ethereum/event"
"github.com/ethereum/go-ethereum/params"
+ "github.com/ethereum/go-ethereum/pow"
"github.com/ethereum/go-ethereum/rlp"
"github.com/ethereum/go-ethereum/trie"
"golang.org/x/net/context"
@@ -247,7 +248,7 @@ func testChainGen(i int, block *core.BlockGen) {
func testChainOdr(t *testing.T, protocol int, expFail uint64, fn odrTestFn) {
var (
evmux = new(event.TypeMux)
- pow = new(core.FakePow)
+ pow = new(pow.FakePow)
sdb, _ = ethdb.NewMemDatabase()
ldb, _ = ethdb.NewMemDatabase()
genesis = core.WriteGenesisBlockForTesting(sdb, core.GenesisAccount{Address: testBankAddress, Balance: testBankFunds})
diff --git a/light/txpool_test.go b/light/txpool_test.go
index af2dcbbef17f327e297c0a72997f98b6a9378a61..980c7c8987469a6c62f8dc9994b4b6b2d3497d67 100644
--- a/light/txpool_test.go
+++ b/light/txpool_test.go
@@ -29,6 +29,7 @@ import (
"github.com/ethereum/go-ethereum/ethdb"
"github.com/ethereum/go-ethereum/event"
"github.com/ethereum/go-ethereum/params"
+ "github.com/ethereum/go-ethereum/pow"
"golang.org/x/net/context"
)
@@ -82,7 +83,7 @@ func TestTxPool(t *testing.T) {
var (
evmux = new(event.TypeMux)
- pow = new(core.FakePow)
+ pow = new(pow.FakePow)
sdb, _ = ethdb.NewMemDatabase()
ldb, _ = ethdb.NewMemDatabase()
genesis = core.WriteGenesisBlockForTesting(sdb, core.GenesisAccount{Address: testBankAddress, Balance: testBankFunds})
diff --git a/log/format.go b/log/format.go
index c44ea8ed4bf4c7f1187906f1b6581910b2bd6fc3..e315b5237d6954af273eab9413c61dbe029901cc 100644
--- a/log/format.go
+++ b/log/format.go
@@ -23,7 +23,6 @@ const (
// locationTrims are trimmed for display to avoid unwieldy log lines.
var locationTrims = []string{
"github.com/ethereum/go-ethereum/",
- "github.com/ethereum/ethash/",
}
// PrintOrigins sets or unsets log location (file:line) printing for terminal
diff --git a/miner/agent.go b/miner/agent.go
index 21300b5b91a6d0e36ce892b0402a671869171edc..3c407f20bb8b8e7e2994e60a04cdf415f6b245a7 100644
--- a/miner/agent.go
+++ b/miner/agent.go
@@ -111,7 +111,7 @@ func (self *CpuAgent) mine(work *Work, stop <-chan struct{}) {
log.Debug(fmt.Sprintf("(re)started agent[%d]. mining...\n", self.index))
// Mine
- nonce, mixDigest := self.pow.Search(work.Block, stop, self.index)
+ nonce, mixDigest := self.pow.Search(work.Block, stop)
if nonce != 0 {
block := work.Block.WithMiningResult(types.EncodeNonce(nonce), common.BytesToHash(mixDigest))
self.returnCh <- &Result{work, block}
@@ -121,5 +121,5 @@ func (self *CpuAgent) mine(work *Work, stop <-chan struct{}) {
}
func (self *CpuAgent) GetHashRate() int64 {
- return self.pow.GetHashrate()
+ return int64(self.pow.Hashrate())
}
diff --git a/miner/miner.go b/miner/miner.go
index 33d77e174d98978036ebb1fed1bd3e9b52725fd1..a91e1ef6b0013676898df4361be367f26c604e6d 100644
--- a/miner/miner.go
+++ b/miner/miner.go
@@ -159,7 +159,7 @@ func (self *Miner) Mining() bool {
}
func (self *Miner) HashRate() (tot int64) {
- tot += self.pow.GetHashrate()
+ tot += int64(self.pow.Hashrate())
// do we care this might race? is it worth we're rewriting some
// aspects of the worker/locking up agents so we can get an accurate
// hashrate?
diff --git a/miner/remote_agent.go b/miner/remote_agent.go
index ec9d2c1991bffec9912e202a894637efb7b93bb7..08c5fc6f086a67ba438903e1d798d2b7b1d6cb35 100644
--- a/miner/remote_agent.go
+++ b/miner/remote_agent.go
@@ -24,7 +24,6 @@ import (
"sync/atomic"
"time"
- "github.com/ethereum/ethash"
"github.com/ethereum/go-ethereum/common"
"github.com/ethereum/go-ethereum/core/types"
"github.com/ethereum/go-ethereum/log"
@@ -115,7 +114,7 @@ func (a *RemoteAgent) GetWork() ([3]string, error) {
block := a.currentWork.Block
res[0] = block.HashNoNonce().Hex()
- seedHash, _ := ethash.GetSeedHash(block.NumberU64())
+ seedHash := pow.EthashSeedHash(block.NumberU64())
res[1] = common.BytesToHash(seedHash).Hex()
// Calculate the "target" to be returned to the external miner
n := big.NewInt(1)
@@ -145,8 +144,8 @@ func (a *RemoteAgent) SubmitWork(nonce types.BlockNonce, mixDigest, hash common.
}
// Make sure the PoW solutions is indeed valid
block := work.Block.WithMiningResult(nonce, mixDigest)
- if !a.pow.Verify(block) {
- log.Warn(fmt.Sprintf("Invalid PoW submitted for %x", hash))
+ if err := a.pow.Verify(block); err != nil {
+ log.Warn(fmt.Sprintf("Invalid PoW submitted for %x: %v", hash, err))
return false
}
// Solutions seems to be valid, return to the miner and notify acceptance
diff --git a/pow/block.go b/pow/block.go
deleted file mode 100644
index 11807113dce41021f11750f7c917bd0b6d62beb1..0000000000000000000000000000000000000000
--- a/pow/block.go
+++ /dev/null
@@ -1,37 +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
-}
diff --git a/pow/ethash.go b/pow/ethash.go
index 91c758d94e1cb7115aba7a34e172b106f704aef2..b22c65e0bd844a0e7fb7668f945cb7f454e0e2a7 100644
--- a/pow/ethash.go
+++ b/pow/ethash.go
@@ -17,1055 +17,189 @@
package pow
import (
- "encoding/binary"
- "io"
+ "bytes"
+ "errors"
"math/big"
- "runtime"
"sync"
- "sync/atomic"
"time"
- "github.com/ethereum/go-ethereum/common"
- "github.com/ethereum/go-ethereum/common/hexutil"
- "github.com/ethereum/go-ethereum/crypto"
"github.com/ethereum/go-ethereum/log"
+ metrics "github.com/rcrowley/go-metrics"
)
-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
+var (
+ ErrInvalidDifficulty = errors.New("non-positive difficulty")
+ ErrInvalidMixDigest = errors.New("invalid mix digest")
+ ErrInvalidPoW = errors.New("pow difficulty invalid")
)
var (
- // Metadata fields to be compatible with the C++ ethash
- ethashRevision = 23 // Data structure version
- ethashMagic = hexutil.MustDecode("0xfee1deadbaddcafe") // Dataset dump magic number
+ // maxUint256 is a big integer representing 2^256-1
+ maxUint256 = new(big.Int).Exp(big.NewInt(2), big.NewInt(256), big.NewInt(0))
)
-// 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*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*epoch - mixBytes)
- for !new(big.Int).SetUint64(size / mixBytes).ProbablyPrime(1) { // Always accurate for n < 2^64
- size -= 2 * mixBytes
- }
- return size
+// 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
+ cache []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
}
-// seedHash is the seed to use for generating a vrification cache and the mining
-// dataset.
-func seedHash(block uint64) []byte {
- seed := make([]byte, 32)
- if block < epochLength {
- return seed
- }
- keccak256 := crypto.Keccak256Hasher()
- for i := 0; i < int(block/epochLength); i++ {
- seed = keccak256(seed)
- }
- return seed
+// generate ensures that the cache content is generates.
+func (c *cache) generate(test bool) {
+ c.once.Do(func() {
+ cacheSize := cacheSize(c.epoch*epochLength + 1)
+ if test {
+ cacheSize = 1024
+ }
+ rawCache := generateCache(cacheSize, seedHash(c.epoch*epochLength+1))
+ c.cache = prepare(uint64(len(rawCache)), bytes.NewReader(rawCache))
+ })
}
-// 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.
-func generateCache(size uint64, seed []byte) []byte {
- // Print some debug logs to allow analysis on low end devices
- logger := log.New("size", size, "seed", hexutil.Bytes(seed))
- logger.Debug("Generating ethash cache")
-
- defer func(start time.Time) {
- logger.Debug("Generated ethash cache", "elapsed", common.PrettyDuration(time.Since(start)))
- }(time.Now())
+// Ethash is a PoW data struture implementing the ethash algorithm.
+type Ethash struct {
+ cachedir string // Data directory to store the verification caches
+ dagdir string // Data directory to store full mining datasets
- // Calculate the number of thoretical rows (we'll store in one buffer nonetheless)
- rows := int(size) / hashBytes
+ caches map[uint64]*cache // In memory caches to avoid regenerating too often
+ future *cache // Pre-generated cache for the estimated future epoch
+ lock sync.Mutex // Ensures thread safety for the in-memory caches
- // Create a hasher to reuse between invocations
- keccak512 := crypto.Keccak512Hasher()
+ hashrate *metrics.StandardMeter // Meter tracking the average hashrate
- // Sequentially produce the initial dataset
- cache := make([]byte, size)
- copy(cache, keccak512(seed))
- for offset := uint64(hashBytes); offset < size; offset += hashBytes {
- copy(cache[offset:], keccak512(cache[offset-hashBytes:offset]))
- }
- // 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])
- copy(cache[dstOff:], keccak512(temp))
- }
- }
- return cache
+ tester bool // Flag whether to use a smaller test dataset
+ shared bool // Flag whether to use a global chared dataset
}
-// prepare convers 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(size uint64, r io.Reader) []uint32 {
- ints := make([]uint32, size/4)
-
- buffer := make([]byte, 4)
- for i := 0; i < len(ints); i++ {
- io.ReadFull(r, buffer)
- ints[i] = binary.LittleEndian.Uint32(buffer)
+// NewFullEthash creates a full sized ethash PoW scheme.
+func NewFullEthash(cachedir, dagdir string) PoW {
+ return &Ethash{
+ cachedir: cachedir,
+ dagdir: dagdir,
+ caches: make(map[uint64]*cache),
}
- return ints
}
-// 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
+// NewTestEthash creates a small sized ethash PoW scheme useful only for testing
+// purposes.
+func NewTestEthash() PoW {
+ return &Ethash{
+ caches: make(map[uint64]*cache),
+ tester: true,
+ }
}
-// 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]
+// NewSharedEthash creates a full sized ethash PoW shared between all requesters
+// running in the same process.
+func NewSharedEthash() PoW {
+ return &Ethash{
+ caches: make(map[uint64]*cache),
+ shared: true,
}
}
-// 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 crypto.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)])
+// Verify implements PoW, checking whether the given block satisfies the PoW
+// difficulty requirements.
+func (ethash *Ethash) Verify(block Block) error {
+ // Ensure twe have a valid difficulty for the block
+ difficulty := block.Difficulty()
+ if difficulty.Sign() <= 0 {
+ return ErrInvalidDifficulty
}
- mix = keccak512(mix)
+ // Recompute the digest and PoW value and verify against the block
+ number := block.NumberU64()
+ cache := ethash.cache(number)
- // 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:])
+ size := datasetSize(number)
+ if ethash.tester {
+ size = 32 * 1024
}
- // 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:])
+ digest, result := hashimotoLight(size, cache, block.HashNoNonce().Bytes(), block.Nonce())
+ if !bytes.Equal(block.MixDigest().Bytes(), digest) {
+ return ErrInvalidMixDigest
}
- // Flatten the uint32 mix into a binary one and return
- for i, val := range intMix {
- binary.LittleEndian.PutUint32(mix[i*4:], val)
+ target := new(big.Int).Div(maxUint256, difficulty)
+ if new(big.Int).SetBytes(result).Cmp(target) > 0 {
+ return ErrInvalidPoW
}
- return keccak512(mix)
+ return nil
}
-// generateDataset generates the entire ethash dataset for mining.
-func generateDataset(size uint64, cache []uint32) []byte {
- // Print some debug logs to allow analysis on low end devices
- logger := log.New("size", size)
- logger.Debug("Generating ethash dataset")
-
- defer func(start time.Time) {
- logger.Debug("Generated ethash dataset", "elapsed", common.PrettyDuration(time.Since(start)))
- }(time.Now())
-
- // Generate the dataset on many goroutines since it takes a while
- dataset := make([]byte, size)
- threads := runtime.NumCPU()
-
- 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 := crypto.Keccak512Hasher()
-
- // Calculate the data segment this thread should generate
- batch := uint32(size / hashBytes / uint64(threads))
- start := uint32(id) * batch
- limit := start + batch
- if limit > uint32(size/hashBytes) {
- limit = uint32(size / hashBytes)
- }
- // Calculate the dataset segment
- percent := uint32(size / hashBytes / 100)
- for index := start; index < limit; index++ {
- copy(dataset[index*hashBytes:], generateDatasetItem(cache, index, keccak512))
-
- if status := atomic.AddUint32(&progress, 1); status%percent == 0 {
- logger.Info("Generating DAG in progress", "percentage", uint64(status*100)/(size/hashBytes))
+// 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) >= 3 {
+ var evict *cache
+ for _, cache := range ethash.caches {
+ if evict == nil || evict.used.After(cache.used) {
+ evict = cache
}
}
- }(i)
- }
- // Wait for all the generators to finish and return
- pend.Wait()
-
- return dataset
-}
-
-// 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))
+ delete(ethash.caches, evict.epoch)
- 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))
+ log.Debug("Evictinged ethash cache", "old", evict.epoch, "used", evict.used)
}
- 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]
+ // If we have the new cache pre-generated, use that, otherwise create a new one
+ if ethash.future != nil && ethash.future.epoch == epoch {
+ log.Debug("Using pre-generated cache", "epoch", epoch)
+ current, ethash.future = ethash.future, nil
+ } else {
+ log.Debug("Generating new ethash cache", "epoch", epoch)
+ current = &cache{epoch: epoch}
+ }
+ ethash.caches[epoch] = current
- digest := make([]byte, common.HashLength)
- for i, val := range mix {
- binary.LittleEndian.PutUint32(digest[i*4:], val)
+ // If we just used up the future cache, or need a refresh, regenerate
+ if ethash.future == nil || ethash.future.epoch <= epoch {
+ log.Debug("Pre-generating cache for the future", "epoch", epoch+1)
+ future = &cache{epoch: epoch + 1}
+ ethash.future = future
+ }
}
- return digest, crypto.Keccak256(append(seed, digest...))
-}
+ current.used = time.Now()
+ ethash.lock.Unlock()
-// 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 := crypto.Keccak512Hasher()
+ // Wait for generation finish, bump the timestamp and finalize the cache
+ current.once.Do(func() {
+ current.generate(ethash.tester)
+ })
+ current.lock.Lock()
+ current.used = time.Now()
+ current.lock.Unlock()
- 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
+ // If we exhusted the future cache, now's a goot time to regenerate it
+ if future != nil {
+ go future.generate(ethash.tester)
}
- return hashimoto(hash, nonce, size, lookup)
+ return current.cache
}
-// 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(size uint64, 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, size, lookup)
+// 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) {
+ return 0, nil
}
-// 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,
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- 17892900224, 17901287296, 17909677696, 17918058112, 17926451072,
- 17934843776, 17943230848, 17951609216, 17960008576, 17968397696,
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- 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}
+// 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()
+}
-// 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,
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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}
+// 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
new file mode 100644
index 0000000000000000000000000000000000000000..fcd6af995241fb54bc035469521fab8b92bf8168
--- /dev/null
+++ b/pow/ethash_algo.go
@@ -0,0 +1,1071 @@
+// 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"
+ "io"
+ "math/big"
+ "runtime"
+ "sync"
+ "sync/atomic"
+ "time"
+
+ "github.com/ethereum/go-ethereum/common"
+ "github.com/ethereum/go-ethereum/common/hexutil"
+ "github.com/ethereum/go-ethereum/crypto"
+ "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
+)
+
+var (
+ // Metadata fields to be compatible with the C++ ethash
+ ethashRevision = 23 // Data structure version
+ ethashMagic = hexutil.MustDecode("0xfee1deadbaddcafe") // Dataset dump magic number
+)
+
+// 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*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*epoch - mixBytes)
+ for !new(big.Int).SetUint64(size / mixBytes).ProbablyPrime(1) { // Always accurate for n < 2^64
+ size -= 2 * mixBytes
+ }
+ return size
+}
+
+// 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 := crypto.Keccak256Hasher()
+ for i := 0; i < int(block/epochLength); i++ {
+ seed = keccak256(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.
+func generateCache(size uint64, seed []byte) []byte {
+ // Print some debug logs to allow analysis on low end devices
+ logger := log.New("size", size, "seed", hexutil.Bytes(seed))
+ logger.Debug("Generating ethash cache")
+
+ defer func(start time.Time) {
+ logger.Debug("Generated ethash cache", "elapsed", common.PrettyDuration(time.Since(start)))
+ }(time.Now())
+
+ // Calculate the number of thoretical rows (we'll store in one buffer nonetheless)
+ rows := int(size) / hashBytes
+
+ // Create a hasher to reuse between invocations
+ keccak512 := crypto.Keccak512Hasher()
+
+ // Sequentially produce the initial dataset
+ cache := make([]byte, size)
+ copy(cache, keccak512(seed))
+ for offset := uint64(hashBytes); offset < size; offset += hashBytes {
+ copy(cache[offset:], keccak512(cache[offset-hashBytes:offset]))
+ }
+ // 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])
+ copy(cache[dstOff:], keccak512(temp))
+ }
+ }
+ return cache
+}
+
+// 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(size uint64, r io.Reader) []uint32 {
+ ints := make([]uint32, size/4)
+
+ buffer := make([]byte, 4)
+ for i := 0; i < len(ints); i++ {
+ io.ReadFull(r, buffer)
+ ints[i] = binary.LittleEndian.Uint32(buffer)
+ }
+ return ints
+}
+
+// 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 crypto.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)])
+ }
+ mix = keccak512(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)
+ }
+ return keccak512(mix)
+}
+
+// generateDataset generates the entire ethash dataset for mining.
+func generateDataset(size uint64, cache []uint32) []byte {
+ // Print some debug logs to allow analysis on low end devices
+ logger := log.New("size", size)
+ logger.Debug("Generating ethash dataset")
+
+ defer func(start time.Time) {
+ logger.Debug("Generated ethash dataset", "elapsed", common.PrettyDuration(time.Since(start)))
+ }(time.Now())
+
+ // Generate the dataset on many goroutines since it takes a while
+ dataset := make([]byte, size)
+ threads := runtime.NumCPU()
+
+ 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 := crypto.Keccak512Hasher()
+
+ // Calculate the data segment this thread should generate
+ batch := uint32(size / hashBytes / uint64(threads))
+ start := uint32(id) * batch
+ limit := start + batch
+ if limit > uint32(size/hashBytes) {
+ limit = uint32(size / hashBytes)
+ }
+ // Calculate the dataset segment
+ percent := uint32(size / hashBytes / 100)
+ for index := start; index < limit; index++ {
+ copy(dataset[index*hashBytes:], generateDatasetItem(cache, index, keccak512))
+
+ if status := atomic.AddUint32(&progress, 1); status%percent == 0 {
+ logger.Info("Generating DAG in progress", "percentage", uint64(status*100)/(size/hashBytes))
+ }
+ }
+ }(i)
+ }
+ // Wait for all the generators to finish and return
+ pend.Wait()
+
+ return dataset
+}
+
+// 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 := crypto.Keccak512Hasher()
+
+ 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(size uint64, 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, size, 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,
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+ 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,
+ 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,
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+ 201588544, 201719744, 201850816, 201981632, 202111552, 202244032,
+ 202374464, 202505152, 202636352, 202767808, 202898368, 203030336,
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+ 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_test.go b/pow/ethash_algo_test.go
similarity index 99%
rename from pow/ethash_test.go
rename to pow/ethash_algo_test.go
index 43d899e21973e194a63163f4ed82c6d5f57d6801..253ddfa72e3987a7fd22db36961a987b50884207 100644
--- a/pow/ethash_test.go
+++ b/pow/ethash_algo_test.go
@@ -675,14 +675,14 @@ func TestHashimoto(t *testing.T) {
}
}
-// Becnhmarks the cache generation performance.
+// Benchmarks the cache generation performance.
func BenchmarkCacheGeneration(b *testing.B) {
for i := 0; i < b.N; i++ {
generateCache(cacheSize(1), make([]byte, 32))
}
}
-// Becnhmarks the dataset (small) generation performance.
+// Benchmarks the dataset (small) generation performance.
func BenchmarkSmallDatasetGeneration(b *testing.B) {
rawCache := generateCache(65536, make([]byte, 32))
cache := prepare(uint64(len(rawCache)), bytes.NewReader(rawCache))
@@ -693,7 +693,7 @@ func BenchmarkSmallDatasetGeneration(b *testing.B) {
}
}
-// Becnhmarks the light verification performace.
+// Benchmarks the light verification performance.
func BenchmarkHashimotoLight(b *testing.B) {
var (
rawCache = generateCache(cacheSize(1), make([]byte, 32))
@@ -706,7 +706,7 @@ func BenchmarkHashimotoLight(b *testing.B) {
}
}
-// Becnhmarks the full (small) verification performace.
+// Benchmarks the full (small) verification performance.
func BenchmarkHashimotoFullSmall(b *testing.B) {
var (
rawCache = generateCache(65536, make([]byte, 32))
diff --git a/pow/pow.go b/pow/pow.go
index 592d9647515451e3bd1bf333e66196d89be1b6a8..4849adb3ea8cbd8766c3371dc5f3f699f92b5865 100644
--- a/pow/pow.go
+++ b/pow/pow.go
@@ -16,9 +16,43 @@
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 {
- Search(block Block, stop <-chan struct{}, index int) (uint64, []byte)
- Verify(block Block) bool
- GetHashrate() int64
- Turbo(bool)
+ 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/tests/block_test_util.go b/tests/block_test_util.go
index 06792cac177e73a5b4dc9409917fac8008e274ce..456a4ccb861f6875ce8c2133a64fc49ebad286f4 100644
--- a/tests/block_test_util.go
+++ b/tests/block_test_util.go
@@ -26,7 +26,6 @@ import (
"strconv"
"strings"
- "github.com/ethereum/ethash"
"github.com/ethereum/go-ethereum/common"
"github.com/ethereum/go-ethereum/core"
"github.com/ethereum/go-ethereum/core/state"
@@ -36,6 +35,7 @@ import (
"github.com/ethereum/go-ethereum/event"
"github.com/ethereum/go-ethereum/log"
"github.com/ethereum/go-ethereum/params"
+ "github.com/ethereum/go-ethereum/pow"
"github.com/ethereum/go-ethereum/rlp"
)
@@ -172,7 +172,7 @@ func runBlockTest(homesteadBlock, daoForkBlock, gasPriceFork *big.Int, test *Blo
core.WriteHeadBlockHash(db, test.Genesis.Hash())
evmux := new(event.TypeMux)
config := ¶ms.ChainConfig{HomesteadBlock: homesteadBlock, DAOForkBlock: daoForkBlock, DAOForkSupport: true, EIP150Block: gasPriceFork}
- chain, err := core.NewBlockChain(db, config, ethash.NewShared(), evmux, vm.Config{})
+ chain, err := core.NewBlockChain(db, config, pow.NewSharedEthash(), evmux, vm.Config{})
if err != nil {
return err
}