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author | Felix Lange <fjl@twurst.com> | 2017-01-06 23:55:03 +0800 |
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committer | Felix Lange <fjl@twurst.com> | 2017-01-07 01:18:07 +0800 |
commit | 13e3b2f433c48fe81423c1a13e9a5194ece61b01 (patch) | |
tree | 19ff7c32597a41bbfe7ccc0d32ecaed05d0e6132 /pow | |
parent | f2da6581ba827a2aab091f764ace8017b26450d8 (diff) | |
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logger, pow/dagger, pow/ezp: delete dead code
Diffstat (limited to 'pow')
-rw-r--r-- | pow/dagger/dagger.go | 176 | ||||
-rw-r--r-- | pow/dagger/dagger_test.go | 35 | ||||
-rw-r--r-- | pow/ezp/pow.go | 113 |
3 files changed, 0 insertions, 324 deletions
diff --git a/pow/dagger/dagger.go b/pow/dagger/dagger.go deleted file mode 100644 index f54ba71ca..000000000 --- a/pow/dagger/dagger.go +++ /dev/null @@ -1,176 +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 dagger - -import ( - "hash" - "math/big" - "math/rand" - "time" - - "github.com/ethereum/go-ethereum/common" - "github.com/ethereum/go-ethereum/crypto/sha3" - "github.com/ethereum/go-ethereum/logger" -) - -var powlogger = logger.NewLogger("POW") - -type Dagger struct { - hash *big.Int - xn *big.Int -} - -var Found bool - -func (dag *Dagger) Find(obj *big.Int, resChan chan int64) { - r := rand.New(rand.NewSource(time.Now().UnixNano())) - - for i := 0; i < 1000; i++ { - rnd := r.Int63() - - res := dag.Eval(big.NewInt(rnd)) - powlogger.Infof("rnd %v\nres %v\nobj %v\n", rnd, res, obj) - if res.Cmp(obj) < 0 { - // Post back result on the channel - resChan <- rnd - // Notify other threads we've found a valid nonce - Found = true - } - - // Break out if found - if Found { - break - } - } - - resChan <- 0 -} - -func (dag *Dagger) Search(hash, diff *big.Int) (uint64, []byte) { - // TODO fix multi threading. Somehow it results in the wrong nonce - amountOfRoutines := 1 - - dag.hash = hash - - obj := common.BigPow(2, 256) - obj = obj.Div(obj, diff) - - Found = false - resChan := make(chan int64, 3) - var res int64 - - for k := 0; k < amountOfRoutines; k++ { - go dag.Find(obj, resChan) - - // Wait for each go routine to finish - } - for k := 0; k < amountOfRoutines; k++ { - // Get the result from the channel. 0 = quit - if r := <-resChan; r != 0 { - res = r - } - } - - return uint64(res), nil -} - -func (dag *Dagger) Verify(hash, diff, nonce *big.Int) bool { - dag.hash = hash - - obj := common.BigPow(2, 256) - obj = obj.Div(obj, diff) - - return dag.Eval(nonce).Cmp(obj) < 0 -} - -func DaggerVerify(hash, diff, nonce *big.Int) bool { - dagger := &Dagger{} - dagger.hash = hash - - obj := common.BigPow(2, 256) - obj = obj.Div(obj, diff) - - return dagger.Eval(nonce).Cmp(obj) < 0 -} - -func (dag *Dagger) Node(L uint64, i uint64) *big.Int { - if L == i { - return dag.hash - } - - var m *big.Int - if L == 9 { - m = big.NewInt(16) - } else { - m = big.NewInt(3) - } - - sha := sha3.NewKeccak256() - sha.Reset() - d := sha3.NewKeccak256() - b := new(big.Int) - ret := new(big.Int) - - for k := 0; k < int(m.Uint64()); k++ { - d.Reset() - d.Write(dag.hash.Bytes()) - d.Write(dag.xn.Bytes()) - d.Write(big.NewInt(int64(L)).Bytes()) - d.Write(big.NewInt(int64(i)).Bytes()) - d.Write(big.NewInt(int64(k)).Bytes()) - - b.SetBytes(Sum(d)) - pk := b.Uint64() & ((1 << ((L - 1) * 3)) - 1) - sha.Write(dag.Node(L-1, pk).Bytes()) - } - - ret.SetBytes(Sum(sha)) - - return ret -} - -func Sum(sha hash.Hash) []byte { - //in := make([]byte, 32) - return sha.Sum(nil) -} - -func (dag *Dagger) Eval(N *big.Int) *big.Int { - pow := common.BigPow(2, 26) - dag.xn = pow.Div(N, pow) - - sha := sha3.NewKeccak256() - sha.Reset() - ret := new(big.Int) - - for k := 0; k < 4; k++ { - d := sha3.NewKeccak256() - b := new(big.Int) - - d.Reset() - d.Write(dag.hash.Bytes()) - d.Write(dag.xn.Bytes()) - d.Write(N.Bytes()) - d.Write(big.NewInt(int64(k)).Bytes()) - - b.SetBytes(Sum(d)) - pk := (b.Uint64() & 0x1ffffff) - - sha.Write(dag.Node(9, pk).Bytes()) - } - - return ret.SetBytes(Sum(sha)) -} diff --git a/pow/dagger/dagger_test.go b/pow/dagger/dagger_test.go deleted file mode 100644 index 39b74df30..000000000 --- a/pow/dagger/dagger_test.go +++ /dev/null @@ -1,35 +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 dagger - -import ( - "math/big" - "testing" - - "github.com/ethereum/go-ethereum/common" -) - -func BenchmarkDaggerSearch(b *testing.B) { - hash := big.NewInt(0) - diff := common.BigPow(2, 36) - o := big.NewInt(0) // nonce doesn't matter. We're only testing against speed, not validity - - // Reset timer so the big generation isn't included in the benchmark - b.ResetTimer() - // Validate - DaggerVerify(hash, diff, o) -} diff --git a/pow/ezp/pow.go b/pow/ezp/pow.go deleted file mode 100644 index 0f7ee3570..000000000 --- a/pow/ezp/pow.go +++ /dev/null @@ -1,113 +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 ezp - -import ( - "encoding/binary" - "math/big" - "math/rand" - "time" - - "github.com/ethereum/go-ethereum/common" - "github.com/ethereum/go-ethereum/crypto/sha3" - "github.com/ethereum/go-ethereum/logger" - "github.com/ethereum/go-ethereum/pow" -) - -var powlogger = logger.NewLogger("POW") - -type EasyPow struct { - hash *big.Int - HashRate int64 - turbo bool -} - -func New() *EasyPow { - return &EasyPow{turbo: false} -} - -func (pow *EasyPow) GetHashrate() int64 { - return pow.HashRate -} - -func (pow *EasyPow) Turbo(on bool) { - pow.turbo = on -} - -func (pow *EasyPow) Search(block pow.Block, stop <-chan struct{}, index int) (uint64, []byte) { - r := rand.New(rand.NewSource(time.Now().UnixNano())) - hash := block.HashNoNonce() - diff := block.Difficulty() - //i := int64(0) - // TODO fix offset - i := rand.Int63() - starti := i - start := time.Now().UnixNano() - - defer func() { pow.HashRate = 0 }() - - // Make sure stop is empty -empty: - for { - select { - case <-stop: - default: - break empty - } - } - - for { - select { - case <-stop: - return 0, nil - default: - i++ - - elapsed := time.Now().UnixNano() - start - hashes := ((float64(1e9) / float64(elapsed)) * float64(i-starti)) / 1000 - pow.HashRate = int64(hashes) - - sha := uint64(r.Int63()) - if verify(hash, diff, sha) { - return sha, nil - } - } - - if !pow.turbo { - time.Sleep(20 * time.Microsecond) - } - } -} - -func (pow *EasyPow) Verify(block pow.Block) bool { - return Verify(block) -} - -func verify(hash common.Hash, diff *big.Int, nonce uint64) bool { - sha := sha3.NewKeccak256() - n := make([]byte, 8) - binary.PutUvarint(n, nonce) - sha.Write(n) - sha.Write(hash[:]) - verification := new(big.Int).Div(common.BigPow(2, 256), diff) - res := common.BigD(sha.Sum(nil)) - return res.Cmp(verification) <= 0 -} - -func Verify(block pow.Block) bool { - return verify(block.HashNoNonce(), block.Difficulty(), block.Nonce()) -} |