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address.go
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address.go
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package types
import (
"bytes"
"encoding/hex"
"encoding/json"
"errors"
"fmt"
"github.com/pokt-network/pocket-core/codec"
"github.com/pokt-network/pocket-core/crypto"
tmCrypto "github.com/tendermint/tendermint/crypto"
"gopkg.in/yaml.v2"
)
const (
AddrLen = 20
)
// Address is a common interface for different types of Addresses used by the SDK
type AddressI interface {
Equals(Address) bool
Empty() bool
Marshal() ([]byte, error)
MarshalJSON() ([]byte, error)
Bytes() []byte
String() string
Format(s fmt.State, verb rune)
}
// Ensure that different address types implement the interface
var (
_ AddressI = Address{}
_ yaml.Marshaler = Address{}
_ codec.ProtoMarshaler = &Address{}
)
func VerifyAddressFormat(bz []byte) error {
verifier := GetConfig().GetAddressVerifier()
if verifier != nil {
return verifier(bz)
}
if len(bz) != AddrLen {
return errors.New("Incorrect address length")
}
return nil
}
// Address a wrapper around bytes meant to represent an address.
// When marshaled to a string or JSON.
type Address tmCrypto.Address
func (a *Address) Reset() {
*a = Address{}
}
func (a Address) ProtoMessage() {
p := a.ToProto()
p.ProtoMessage()
}
func (a Address) MarshalTo(data []byte) (n int, err error) {
p := a.ToProto()
return p.MarshalTo(data)
}
func (a Address) MarshalToSizedBuffer(dAtA []byte) (int, error) {
p := a.ToProto()
return p.MarshalToSizedBuffer(dAtA)
}
func (a Address) Size() int {
p := a.ToProto()
return p.Size()
}
func (a Address) Marshal() ([]byte, error) {
p := a.ToProto()
return p.Marshal()
}
func (a *Address) Unmarshal(data []byte) error {
var pa ProtoAddress
err := pa.Unmarshal(data)
if err != nil {
return err
}
*a = pa.FromProto()
return nil
}
func (a Address) ToProto() ProtoAddress {
return ProtoAddress{
Address: a,
}
}
func (pa ProtoAddress) FromProto() Address {
return pa.Address
}
// Returns boolean for whether two Addresses are Equal
func (a Address) Equals(aa2 Address) bool {
if a.Empty() && aa2.Empty() {
return true
}
return bytes.Equal(a.Bytes(), aa2.Bytes())
}
// Returns boolean for whether an Address is empty
func (a Address) Empty() bool {
if a == nil {
return true
}
aa2 := Address{}
return bytes.Equal(a.Bytes(), aa2.Bytes())
}
// MarshalJSON marshals to JSON.
func (a Address) MarshalJSON() ([]byte, error) {
return json.Marshal(a.String())
}
// MarshalYAML marshals to YAML.
func (a Address) MarshalYAML() (interface{}, error) {
return a.String(), nil
}
// UnmarshalJSON unmarshals from JSON.
func (a *Address) UnmarshalJSON(data []byte) error {
var s string
err := json.Unmarshal(data, &s)
if err != nil {
return err
}
aa2, err := AddressFromHex(s)
if err != nil {
return err
}
*a = aa2
return nil
}
// UnmarshalYAML unmarshals from JSON
func (a *Address) UnmarshalYAML(data []byte) error {
var s string
err := yaml.Unmarshal(data, &s)
if err != nil {
return err
}
aa2, err := AddressFromHex(s)
if err != nil {
return err
}
*a = aa2
return nil
}
// RawBytes returns the raw address bytes.
func (a Address) Bytes() []byte {
return a
}
// String implements the Stringer interface.
func (a Address) String() string {
if a.Empty() {
return ""
}
str := hex.EncodeToString(a.Bytes())
return str
}
// Format implements the fmt.Formatter interface.
// nolint: errcheck
func (a Address) Format(s fmt.State, verb rune) {
switch verb {
case 's':
_, _ = s.Write([]byte(a.String()))
case 'p':
_, _ = s.Write([]byte(fmt.Sprintf("%p", a)))
default:
_, _ = s.Write([]byte(fmt.Sprintf("%X", []byte(a))))
}
}
// get Address from pubkey
func GetAddress(pubkey crypto.PublicKey) Address {
return Address(pubkey.Address())
}
var _ codec.ProtoMarshaler = &Addresses{}
// Address a wrapper around bytes meant to represent an address.
// When marshaled to a string or JSON.
type Addresses []Address
func (a *Addresses) Reset() {
*a = Addresses{}
}
func (a Addresses) String() string {
var res string
for _, arr := range a {
res = res + arr.String() + "\n"
}
return res
}
func (a Addresses) ProtoMessage() {
p := a.ToProto()
p.ProtoMessage()
}
func (a Addresses) Marshal() ([]byte, error) {
p := a.ToProto()
return p.Marshal()
}
func (a Addresses) MarshalTo(data []byte) (n int, err error) {
p := a.ToProto()
return p.MarshalTo(data)
}
func (a Addresses) MarshalToSizedBuffer(dAtA []byte) (int, error) {
p := a.ToProto()
return p.MarshalToSizedBuffer(dAtA)
}
func (a Addresses) Size() int {
p := a.ToProto()
return p.Size()
}
func (a *Addresses) Unmarshal(data []byte) error {
var pa ProtoAddresses
err := pa.Unmarshal(data)
if err != nil {
return err
}
*a = pa.FromProto()
return nil
}
func (a Addresses) ToProto() ProtoAddresses {
return ProtoAddresses{Arr: a}
}
func (pa ProtoAddresses) FromProto() Addresses {
return pa.Arr
}
// AddressFromHex creates an Address from a hex string.
func AddressFromHex(address string) (addr Address, err error) {
if len(address) == 0 {
return Address{}, nil
}
bz, err := hex.DecodeString(address)
if err != nil {
return nil, err
}
err = VerifyAddressFormat(bz)
if err != nil {
return nil, err
}
return bz, nil
}