Adds hashrate

test.go

@@ -1,11 +1,13 @@
 package main
 
 import (
-	"os"
 	"bytes"
-	"encoding/binary"
 	"crypto/sha256"
+	"encoding/binary"
 	"math/big"
+	"os"
+	"time"
+	"fmt"
 )
 
 func main() {
@@ -15,21 +17,27 @@ func main() {
 	buffer := make([]byte, total+8)
 	copy(buffer, bytes)
 
-	threshold := new(big.Int)
-	threshold.SetString("00000099999999999999999999999999999999999999999999999999999999999999999999999", 10)
+	var maxUint256 = new(big.Int).Exp(big.NewInt(2), big.NewInt(256), big.NewInt(0))
+	threshold := new(big.Int).Div(maxUint256, big.NewInt(1000000000))
 
+	start := time.Now()
+	found := int64(0)
 	for i := int64(0); i < 1<<63-1; i++ {
 		binary.PutVarint(buffer[total:], i)
 		sum := sha256.Sum256(buffer)
 
-		value := new(big.Int)
-		value.SetBytes(sum[:])
+		value := new(big.Int).SetBytes(sum[:])
 
 		if value.Cmp(threshold) < 0 {
 			println("Found match", value.String())
+			found = i
 			break
 		}
 	}
+
+	hashesPerSecond := found / int64(time.Since(start).Seconds())
+
+	fmt.Printf("Found a match with hashrate of %.2f MH/s\n", float32(hashesPerSecond)/float32(1000000))
 }
 
 func argToBytes() []byte {