Moved pow

core/dagger.go

@@ -6,8 +6,6 @@ import (
 	"math/rand"
 	"time"
 
-	"github.com/ethereum/go-ethereum/core/types"
-	"github.com/ethereum/go-ethereum/crypto"
 	"github.com/ethereum/go-ethereum/ethutil"
 	"github.com/ethereum/go-ethereum/logger"
 	"github.com/obscuren/sha3"
@@ -15,89 +13,6 @@ import (
 
 var powlogger = logger.NewLogger("POW")
 
-type PoW interface {
-	Search(block *types.Block, stop <-chan struct{}) []byte
-	Verify(hash []byte, diff *big.Int, nonce []byte) bool
-	GetHashrate() int64
-	Turbo(bool)
-}
-
-type EasyPow struct {
-	hash     *big.Int
-	HashRate int64
-	turbo    bool
-}
-
-func (pow *EasyPow) GetHashrate() int64 {
-	return pow.HashRate
-}
-
-func (pow *EasyPow) Turbo(on bool) {
-	pow.turbo = on
-}
-
-func (pow *EasyPow) Search(block *types.Block, stop <-chan struct{}) []byte {
-	r := rand.New(rand.NewSource(time.Now().UnixNano()))
-	hash := block.HashNoNonce()
-	diff := block.Difficulty
-	i := int64(0)
-	start := time.Now().UnixNano()
-	t := time.Now()
-
-	for {
-		select {
-		case <-stop:
-			powlogger.Infoln("Breaking from mining")
-			pow.HashRate = 0
-			return nil
-		default:
-			i++
-
-			if time.Since(t) > (1 * time.Second) {
-				elapsed := time.Now().UnixNano() - start
-				hashes := ((float64(1e9) / float64(elapsed)) * float64(i)) / 1000
-				pow.HashRate = int64(hashes)
-				powlogger.Infoln("Hashing @", pow.HashRate, "khash")
-
-				t = time.Now()
-			}
-
-			sha := crypto.Sha3(big.NewInt(r.Int63()).Bytes())
-			if pow.Verify(hash, diff, sha) {
-				return sha
-			}
-		}
-
-		if !pow.turbo {
-			time.Sleep(20 * time.Microsecond)
-		}
-	}
-
-	return nil
-}
-
-func (pow *EasyPow) Verify(hash []byte, diff *big.Int, nonce []byte) bool {
-	sha := sha3.NewKeccak256()
-
-	d := append(hash, nonce...)
-	sha.Write(d)
-
-	verification := new(big.Int).Div(ethutil.BigPow(2, 256), diff)
-	res := ethutil.U256(ethutil.BigD(sha.Sum(nil)))
-
-	/*
-		fmt.Printf("hash w/o nonce %x\n", hash)
-		fmt.Printf("2**256 / %v = %v\n", diff, verification)
-		fmt.Printf("%v <= %v\n", res, verification)
-		fmt.Printf("vlen: %d rlen: %d\n", len(verification.Bytes()), len(res.Bytes()))
-	*/
-
-	return res.Cmp(verification) <= 0
-}
-
-func (pow *EasyPow) SetHash(hash *big.Int) {
-}
-
 type Dagger struct {
 	hash *big.Int
 	xn   *big.Int