Change prefix to xdc

cmd/puppeth/wizard.go

@@ -244,7 +244,7 @@ func (w *wizard) readPassword() string {
 func (w *wizard) readAddress() *common.Address {
 	for {
 		// Read the address from the user
-		fmt.Printf("> 0x")
+		fmt.Printf("> xdc")
 		text, err := w.in.ReadString('\n')
 		if err != nil {
 			log.Crit("Failed to read user input", "err", err)
@@ -269,7 +269,7 @@ func (w *wizard) readAddress() *common.Address {
 func (w *wizard) readDefaultAddress(def common.Address) common.Address {
 	for {
 		// Read the address from the user
-		fmt.Printf("> 0x")
+		fmt.Printf("> xdc")
 		text, err := w.in.ReadString('\n')
 		if err != nil {
 			log.Crit("Failed to read user input", "err", err)

common/bytes.go

@@ -28,11 +28,16 @@ func ToHex(b []byte) string {
 	return "0x" + hex
 }
 
+// FromHex returns the bytes represented by the hexadecimal string s.
+// s may be prefixed with "0x".
 func FromHex(s string) []byte {
 	if len(s) > 1 {
 		if s[0:2] == "0x" || s[0:2] == "0X" {
 			s = s[2:]
 		}
+		if (s[0] == 'x' || s[0] == 'X') && (s[1] == 'd' || s[1] == 'D') && (s[2] == 'c' || s[2] == 'C') {
+			s = s[3:]
+		}
 	}
 	if len(s)%2 == 1 {
 		s = "0" + s
@@ -53,6 +58,10 @@ func CopyBytes(b []byte) (copiedBytes []byte) {
 	return
 }
 
+func hasXDCPrefix(str string) bool {
+	return len(str) >= 3 && (str[0] == 'x' || str[0] == 'X') && (str[1] == 'd' || str[1] == 'D') && (str[2] == 'c' || str[2] == 'C')
+}
+
 func hasHexPrefix(str string) bool {
 	return len(str) >= 2 && str[0] == '0' && (str[1] == 'x' || str[1] == 'X')
 }

common/hexutil/json.go

@@ -44,6 +44,14 @@ func (b Bytes) MarshalText() ([]byte, error) {
 	return result, nil
 }
 
+// MarshalXDCText implements encoding.TextMarshaler
+func (b Bytes) MarshalXDCText() ([]byte, error) {
+	result := make([]byte, len(b)*2+3)
+	copy(result, `xdc`)
+	hex.Encode(result[3:], b)
+	return result, nil
+}
+
 // UnmarshalJSON implements json.Unmarshaler.
 func (b *Bytes) UnmarshalJSON(input []byte) error {
 	if !isString(input) {
@@ -277,12 +285,18 @@ func bytesHave0xPrefix(input []byte) bool {
 	return len(input) >= 2 && input[0] == '0' && (input[1] == 'x' || input[1] == 'X')
 }
 
+func bytesHaveXDCPrefix(input []byte) bool {
+	return len(input) >= 3 && (input[0] == 'x' || input[0] == 'X') && (input[1] == 'd' || input[1] == 'D') && (input[2] == 'c' || input[2] == 'C')
+}
+
 func checkText(input []byte, wantPrefix bool) ([]byte, error) {
 	if len(input) == 0 {
 		return nil, nil // empty strings are allowed
 	}
-	if bytesHave0xPrefix(input) {
+	if bytesHaveXDCPrefix(input) {
-		input = input[2:]
+		input = input[3:]
+	} else if bytesHave0xPrefix(input) {
+	input = input[2:]
 	} else if wantPrefix {
 		return nil, ErrMissingPrefix
 	}

common/types_test.go

@@ -40,15 +40,15 @@ func TestIsHexAddress(t *testing.T) {
 		str string
 		exp bool
 	}{
-		{"0x5aaeb6053f3e94c9b9a09f33669435e7ef1beaed", true},
+		{"xdc5aaeb6053f3e94c9b9a09f33669435e7ef1beaed", true},
 		{"5aaeb6053f3e94c9b9a09f33669435e7ef1beaed", true},
-		{"0X5aaeb6053f3e94c9b9a09f33669435e7ef1beaed", true},
+		{"XDC5aaeb6053f3e94c9b9a09f33669435e7ef1beaed", true},
-		{"0XAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAA", true},
+		{"XdcAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAA", true},
-		{"0xAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAA", true},
+		{"xdcAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAA", true},
-		{"0x5aaeb6053f3e94c9b9a09f33669435e7ef1beaed1", false},
+		{"xdc5aaeb6053f3e94c9b9a09f33669435e7ef1beaed1", false},
-		{"0x5aaeb6053f3e94c9b9a09f33669435e7ef1beae", false},
+		{"xdc5aaeb6053f3e94c9b9a09f33669435e7ef1beae", false},
 		{"5aaeb6053f3e94c9b9a09f33669435e7ef1beaed11", false},
-		{"0xxaaeb6053f3e94c9b9a09f33669435e7ef1beaed", false},
+		{"xdcxaaeb6053f3e94c9b9a09f33669435e7ef1beaed", false},
 	}
 
 	for _, test := range tests {
@@ -101,6 +101,11 @@ func TestAddressUnmarshalJSON(t *testing.T) {
 		{`"0xG000000000000000000000000000000000000000"`, true, nil},
 		{`"0x0000000000000000000000000000000000000000"`, false, big.NewInt(0)},
 		{`"0x0000000000000000000000000000000000000010"`, false, big.NewInt(16)},
+		{`"xdc"`, true, nil},
+		{`"xdc00"`, true, nil},
+		{`"xdcG000000000000000000000000000000000000000"`, true, nil},
+		{`"xdc0000000000000000000000000000000000000000"`, false, big.NewInt(0)},
+		{`"xdc0000000000000000000000000000000000000010"`, false, big.NewInt(16)},
 	}
 	for i, test := range tests {
 		var v Address
@@ -125,15 +130,15 @@ func TestAddressHexChecksum(t *testing.T) {
 		Output string
 	}{
 		// Test cases from https://github.com/ethereum/EIPs/blob/master/EIPS/eip-55.md#specification
-		{"0x5aaeb6053f3e94c9b9a09f33669435e7ef1beaed", "0x5aAeb6053F3E94C9b9A09f33669435E7Ef1BeAed"},
+		{"xdc5aaeb6053f3e94c9b9a09f33669435e7ef1beaed", "xdc5aAeb6053F3E94C9b9A09f33669435E7Ef1BeAed"},
-		{"0xfb6916095ca1df60bb79ce92ce3ea74c37c5d359", "0xfB6916095ca1df60bB79Ce92cE3Ea74c37c5d359"},
+		{"xdcfb6916095ca1df60bb79ce92ce3ea74c37c5d359", "xdcfB6916095ca1df60bB79Ce92cE3Ea74c37c5d359"},
-		{"0xdbf03b407c01e7cd3cbea99509d93f8dddc8c6fb", "0xdbF03B407c01E7cD3CBea99509d93f8DDDC8C6FB"},
+		{"xdcdbf03b407c01e7cd3cbea99509d93f8dddc8c6fb", "xdcdbF03B407c01E7cD3CBea99509d93f8DDDC8C6FB"},
-		{"0xd1220a0cf47c7b9be7a2e6ba89f429762e7b9adb", "0xD1220A0cf47c7B9Be7A2E6BA89F429762e7b9aDb"},
+		{"xdcd1220a0cf47c7b9be7a2e6ba89f429762e7b9adb", "xdcD1220A0cf47c7B9Be7A2E6BA89F429762e7b9aDb"},
 		// Ensure that non-standard length input values are handled correctly
-		{"0xa", "0x000000000000000000000000000000000000000A"},
+		{"0xa", "xdc000000000000000000000000000000000000000A"},
-		{"0x0a", "0x000000000000000000000000000000000000000A"},
+		{"0x0a", "xdc000000000000000000000000000000000000000A"},
-		{"0x00a", "0x000000000000000000000000000000000000000A"},
+		{"0x00a", "xdc000000000000000000000000000000000000000A"},
-		{"0x000000000000000000000000000000000000000a", "0x000000000000000000000000000000000000000A"},
+		{"0x000000000000000000000000000000000000000a", "xdc000000000000000000000000000000000000000A"},
 	}
 	for i, test := range tests {
 		output := HexToAddress(test.Input).Hex()