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-rw-r--r--common/types.go24
1 files changed, 23 insertions, 1 deletions
diff --git a/common/types.go b/common/types.go
index 803726634..eaf8352fb 100644
--- a/common/types.go
+++ b/common/types.go
@@ -24,6 +24,7 @@ import (
"reflect"
"github.com/ethereum/go-ethereum/common/hexutil"
+ "github.com/ethereum/go-ethereum/crypto/sha3"
)
const (
@@ -163,7 +164,28 @@ func (a Address) Str() string { return string(a[:]) }
func (a Address) Bytes() []byte { return a[:] }
func (a Address) Big() *big.Int { return new(big.Int).SetBytes(a[:]) }
func (a Address) Hash() Hash { return BytesToHash(a[:]) }
-func (a Address) Hex() string { return hexutil.Encode(a[:]) }
+
+// Hex returns an EIP55-compliant hex string representation of the address.
+func (a Address) Hex() string {
+ unchecksummed := hex.EncodeToString(a[:])
+ sha := sha3.NewKeccak256()
+ sha.Write([]byte(unchecksummed))
+ hash := sha.Sum(nil)
+
+ result := []byte(unchecksummed)
+ for i := 0; i < len(result); i++ {
+ hashByte := hash[i/2]
+ if i%2 == 0 {
+ hashByte = hashByte >> 4
+ } else {
+ hashByte &= 0xf
+ }
+ if result[i] > '9' && hashByte > 7 {
+ result[i] -= 32
+ }
+ }
+ return "0x" + string(result)
+}
// String implements the stringer interface and is used also by the logger.
func (a Address) String() string {