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-rw-r--r--pow/ezp/pow.go89
1 files changed, 89 insertions, 0 deletions
diff --git a/pow/ezp/pow.go b/pow/ezp/pow.go
new file mode 100644
index 000000000..cdf89950f
--- /dev/null
+++ b/pow/ezp/pow.go
@@ -0,0 +1,89 @@
+package ezp
+
+import (
+ "math/big"
+ "math/rand"
+ "time"
+
+ "github.com/ethereum/go-ethereum/crypto"
+ "github.com/ethereum/go-ethereum/ethutil"
+ "github.com/ethereum/go-ethereum/logger"
+ "github.com/ethereum/go-ethereum/pow"
+ "github.com/obscuren/sha3"
+)
+
+var powlogger = logger.NewLogger("POW")
+
+type EasyPow struct {
+ hash *big.Int
+ HashRate int64
+ turbo bool
+}
+
+func New() *EasyPow {
+ return &EasyPow{}
+}
+
+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{}) []byte {
+ r := rand.New(rand.NewSource(time.Now().UnixNano()))
+ hash := block.HashNoNonce()
+ diff := block.Diff()
+ 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)))
+
+ return res.Cmp(verification) <= 0
+}
+
+func (pow *EasyPow) Verify(block pow.Block) bool {
+ return pow.verify(block.HashNoNonce(), block.Diff(), block.N())
+}