From de9f79133faa1ff5dcd16fb4fd13d06b7799ded9 Mon Sep 17 00:00:00 2001
From: Matthew Wampler-Doty <matthew.wampler.doty@gmail.com>
Date: Sat, 28 Feb 2015 14:58:37 -0500
Subject: Introducing ethash

---
 pow/block.go         | 12 ++++++++++--
 pow/dagger/dagger.go |  4 ++--
 pow/dash/crypto.c    |  5 -----
 pow/dash/crypto.go   | 14 --------------
 pow/ezp/pow.go       |  8 +++-----
 pow/pow.go           |  2 +-
 6 files changed, 16 insertions(+), 29 deletions(-)
 delete mode 100644 pow/dash/crypto.c
 delete mode 100644 pow/dash/crypto.go

(limited to 'pow')

diff --git a/pow/block.go b/pow/block.go
index 129f96fd3..eb07bc86e 100644
--- a/pow/block.go
+++ b/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
 }
diff --git a/pow/dagger/dagger.go b/pow/dagger/dagger.go
index 310f8abdd..3da7683d5 100644
--- a/pow/dagger/dagger.go
+++ b/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 {
diff --git a/pow/dash/crypto.c b/pow/dash/crypto.c
deleted file mode 100644
index 9c5a62d16..000000000
--- a/pow/dash/crypto.c
+++ /dev/null
@@ -1,5 +0,0 @@
-extern char *Sha3(char *, int);
-char *sha3_cgo(char *data, int l)
-{
-	return Sha3(data, l);
-}
diff --git a/pow/dash/crypto.go b/pow/dash/crypto.go
deleted file mode 100644
index 0644a54ae..000000000
--- a/pow/dash/crypto.go
+++ /dev/null
@@ -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)
-}
diff --git a/pow/ezp/pow.go b/pow/ezp/pow.go
index 8808d7ce0..49854c3d0 100644
--- a/pow/ezp/pow.go
+++ b/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 {
diff --git a/pow/pow.go b/pow/pow.go
index c94ee40ba..11aecbd6b 100644
--- a/pow/pow.go
+++ b/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)
-- 
cgit