Introducing ethash

pow/block.go

@@ -1,12 +1,20 @@
 package pow
 
-import "math/big"
+import (
+	"github.com/ethereum/go-ethereum/core/types"
+	"math/big"
+)
 
 type Block interface {
 	Difficulty() *big.Int
 	HashNoNonce() []byte
 	Nonce() []byte
-	Number() *big.Int
 	MixDigest() []byte
 	SeedHash() []byte
+	NumberU64() uint64
+}
+
+type ChainManager interface {
+	GetBlockByNumber(uint64) *types.Block
+	CurrentBlock() *types.Block
 }

pow/dagger/dagger.go

@@ -44,7 +44,7 @@ func (dag *Dagger) Find(obj *big.Int, resChan chan int64) {
 	resChan <- 0
 }
 
-func (dag *Dagger) Search(hash, diff *big.Int) *big.Int {
+func (dag *Dagger) Search(hash, diff *big.Int) ([]byte, []byte, []byte) {
 	// TODO fix multi threading. Somehow it results in the wrong nonce
 	amountOfRoutines := 1
 
@@ -69,7 +69,7 @@ func (dag *Dagger) Search(hash, diff *big.Int) *big.Int {
 		}
 	}
 
-	return big.NewInt(res)
+	return big.NewInt(res).Bytes(), nil, nil
 }
 
 func (dag *Dagger) Verify(hash, diff, nonce *big.Int) bool {

pow/dash/crypto.c

@@ -1,5 +0,0 @@
-extern char *Sha3(char *, int);
-char *sha3_cgo(char *data, int l)
-{
-	return Sha3(data, l);
-}

pow/dash/crypto.go

@@ -1,14 +0,0 @@
-package dash
-
-/*
-char *sha3_cgo(char *, int); // Forward declaration
-*/
-import "C"
-import (
-	"github.com/ethereum/go-ethereum/crypto"
-)
-
-//export Sha3
-func Sha3(data []byte, l int) []byte {
-	return crypto.Sha3(data)
-}

pow/ezp/pow.go

@@ -32,7 +32,7 @@ func (pow *EasyPow) Turbo(on bool) {
 	pow.turbo = on
 }
 
-func (pow *EasyPow) Search(block pow.Block, stop <-chan struct{}) []byte {
+func (pow *EasyPow) Search(block pow.Block, stop <-chan struct{}) ([]byte, []byte, []byte) {
 	r := rand.New(rand.NewSource(time.Now().UnixNano()))
 	hash := block.HashNoNonce()
 	diff := block.Difficulty()
@@ -57,7 +57,7 @@ empty:
 	for {
 		select {
 		case <-stop:
-			return nil
+			return nil, nil, nil
 		default:
 			i++
 
@@ -67,7 +67,7 @@ empty:
 
 			sha := crypto.Sha3(big.NewInt(r.Int63()).Bytes())
 			if verify(hash, diff, sha) {
-				return sha
+				return sha, nil, nil
 			}
 		}
 
@@ -75,8 +75,6 @@ empty:
 			time.Sleep(20 * time.Microsecond)
 		}
 	}
-
-	return nil
 }
 
 func (pow *EasyPow) Verify(block pow.Block) bool {

pow/pow.go

@@ -1,7 +1,7 @@
 package pow
 
 type PoW interface {
-	Search(block Block, stop <-chan struct{}) []byte
+	Search(block Block, stop <-chan struct{}) ([]byte, []byte, []byte)
 	Verify(block Block) bool
 	GetHashrate() int64
 	Turbo(bool)