update equity frontend part (#1171)

[bytom/bytom.git] / crypto / crypto.go

diff --git a/crypto/crypto.go b/crypto/crypto.go
index 3e21460..1cfc690 100644 (file)
--- a/crypto/crypto.go
+++ b/crypto/crypto.go
@@ -22,6 +22,15 @@ import (
        "golang.org/x/crypto/sha3"
 )
 
+func DoubleSha256(b []byte) []byte {
+       hasher := sha3.New256()
+       hasher.Write(b)
+       sum := hasher.Sum(nil)
+       hasher.Reset()
+       hasher.Write(sum)
+       return hasher.Sum(nil)
+}
+
 func Sha256(data ...[]byte) []byte {
        d := sha3.New256()
        for _, b := range data {
@@ -48,26 +57,3 @@ func Ripemd160(data []byte) []byte {
 
        return ripemd.Sum(nil)
 }
-
-
-func zeroBytes(bytes []byte) {
-       for i := range bytes {
-               bytes[i] = 0
-       }
-}
-
-func toInt(bytes []byte) []int {
-       ints := make([]int, len(bytes))
-       for i := range bytes {
-               ints[i] = int(bytes[i])
-       }
-       return ints
-}
-
-func toBytes(ints []int) []byte {
-       bytes := make([]byte, len(ints))
-       for i := range ints {
-               bytes[i] = byte(ints[i])
-       }
-       return bytes
-}