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

1 files changed, 0 insertions, 176 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))
-}