logger, pow/dagger, pow/ezp: delete dead code

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())
-}