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

1 files changed, 0 insertions, 113 deletions

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())
-}