-// Copyright 2015 The go-ethereum Authors
-// This file is part of the go-ethereum library.
-//
-// The go-ethereum library is free software: you can redistribute it and/or modify
-// it under the terms of the GNU Lesser General Public License as published by
-// the Free Software Foundation, either version 3 of the License, or
-// (at your option) any later version.
-//
-// The go-ethereum library is distributed in the hope that it will be useful,
-// but WITHOUT ANY WARRANTY; without even the implied warranty of
-// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
-// GNU Lesser General Public License for more details.
-//
-// You should have received a copy of the GNU Lesser General Public License
-// along with the go-ethereum library. If not, see <http://www.gnu.org/licenses/>.
-
package common
import (
- _"encoding/hex"
+ _ "encoding/hex"
"encoding/json"
"errors"
- "fmt"
"math/big"
"math/rand"
"reflect"
)
const (
- HashLength = 32
- AddressLength = 42
+ HashLength = 32
+ AddressLength = 42
PubkeyHashLength = 20
)
var hashJsonLengthErr = errors.New("common: unmarshalJSON failed: hash must be exactly 32 bytes")
type (
- Hash [HashLength]byte
- Address [AddressLength]byte
+ Hash [HashLength]byte
)
func BytesToHash(b []byte) Hash {
h.SetBytes(b)
return h
}
+
func StringToHash(s string) Hash { return BytesToHash([]byte(s)) }
func BigToHash(b *big.Int) Hash { return BytesToHash(b.Bytes()) }
-func HexToHash(s string) Hash { return BytesToHash(FromHex(s)) }
-
// Don't use the default 'String' method in case we want to overwrite
// Get the string representation of the underlying hash
func (h Hash) Str() string { return string(h[:]) }
func (h Hash) Bytes() []byte { return h[:] }
-func (h Hash) Big() *big.Int { return Bytes2Big(h[:]) }
func (h Hash) Hex() string { return "0x" + Bytes2Hex(h[:]) }
// UnmarshalJSON parses a hash in its hex from to a hash.
copy(h[HashLength-len(b):], b)
}
-// Set string `s` to h. If s is larger than len(h) it will panic
-func (h *Hash) SetString(s string) { h.SetBytes([]byte(s)) }
-
// Sets h to other
func (h *Hash) Set(other Hash) {
for i, v := range other {
func EmptyHash(h Hash) bool {
return h == Hash{}
}
-
-/////////// Address
-func BytesToAddress(b []byte) Address {
- var a Address
- a.SetBytes(b)
- return a
-}
-func StringToAddress(s string) Address { return BytesToAddress([]byte(s)) }
-func BigToAddress(b *big.Int) Address { return BytesToAddress(b.Bytes()) }
-func HexToAddress(s string) Address { return BytesToAddress(FromHex(s)) }
-
-// IsHexAddress verifies whether a string can represent a valid hex-encoded
-// Ethereum address or not.
-func IsHexAddress(s string) bool {
- if len(s) == 2+2*AddressLength && IsHex(s) {
- return true
- }
- if len(s) == 2*AddressLength && IsHex("0x"+s) {
- return true
- }
- return false
-}
-
-// Get the string representation of the underlying address
-func (a Address) Str() string { return string(a[:]) }
-func (a Address) Bytes() []byte { return a[:] }
-func (a Address) Big() *big.Int { return Bytes2Big(a[:]) }
-func (a Address) Hash() Hash { return BytesToHash(a[:]) }
-func (a Address) Hex() string { return "0x" + Bytes2Hex(a[:]) }
-
-// Sets the address to the value of b. If b is larger than len(a) it will panic
-func (a *Address) SetBytes(b []byte) {
- if len(b) > len(a) {
- b = b[len(b)-AddressLength:]
- }
- copy(a[AddressLength-len(b):], b)
-}
-
-// Set string `s` to a. If s is larger than len(a) it will panic
-func (a *Address) SetString(s string) { a.SetBytes([]byte(s)) }
-
-// Sets a to other
-func (a *Address) Set(other Address) {
- for i, v := range other {
- a[i] = v
- }
-}
-
-// Serialize given address to JSON
-func (a Address) MarshalJSON() ([]byte, error) {
- return json.Marshal(a.Str())
-}
-
-// Parse address from raw json data
-func (a *Address) UnmarshalJSON(data []byte) error {
- if len(data) > 2 && data[0] == '"' && data[len(data)-1] == '"' {
- data = data[1 : len(data)-1]
- }
-
- if len(data) != AddressLength {
- return fmt.Errorf("Invalid address length, expected %d got %d bytes", AddressLength, len(data))
- }
-
- _, res, err := AddressDecode("bm", string(data))
- if err != nil {
- return err
- }
-
- if len(res) != PubkeyHashLength {
- return fmt.Errorf("Invalid address")
- }
- a.Set(BytesToAddress(data))
- return nil
-}
-
-// PP Pretty Prints a byte slice in the following format:
-// hex(value[:4])...(hex[len(value)-4:])
-func PP(value []byte) string {
- if len(value) <= 8 {
- return Bytes2Hex(value)
- }
-
- return fmt.Sprintf("%x...%x", value[:4], value[len(value)-4])
-}
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