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package account
import (
"errors"
"github.com/tendermint/go-ed25519"
. "github.com/tendermint/tendermint/binary"
)
// PubKey is part of Account and Validator.
type PubKey interface {
Address() []byte
VerifyBytes(msg []byte, sig Signature) bool
TypeByte() byte
}
// Types of PubKey implementations
const (
PubKeyTypeNil = byte(0x00)
PubKeyTypeEd25519 = byte(0x01)
)
// for binary.readReflect
var _ = RegisterInterface(
struct{ PubKey }{},
ConcreteType{PubKeyNil{}},
ConcreteType{PubKeyEd25519{}},
)
//-------------------------------------
// Implements PubKey
type PubKeyNil struct{}
func (key PubKeyNil) TypeByte() byte { return PubKeyTypeNil }
func (key PubKeyNil) Address() []byte {
panic("PubKeyNil has no address")
}
func (key PubKeyNil) VerifyBytes(msg []byte, sig_ Signature) bool {
panic("PubKeyNil cannot verify messages")
}
//-------------------------------------
// Implements PubKey
type PubKeyEd25519 []byte
func (key PubKeyEd25519) TypeByte() byte { return PubKeyTypeEd25519 }
// TODO: Or should this just be BinaryRipemd160(key)? (The difference is the TypeByte.)
func (key PubKeyEd25519) Address() []byte { return BinaryRipemd160([]byte(key)) }
func (key PubKeyEd25519) ValidateBasic() error {
if len(key) != ed25519.PublicKeySize {
return errors.New("Invalid PubKeyEd25519 key size")
}
return nil
}
func (key PubKeyEd25519) VerifyBytes(msg []byte, sig_ Signature) bool {
sig, ok := sig_.(SignatureEd25519)
if !ok {
panic("PubKeyEd25519 expects an SignatureEd25519 signature")
}
v1 := &ed25519.Verify{
Message: msg,
PubKey: key,
Signature: sig,
}
return ed25519.VerifyBatch([]*ed25519.Verify{v1})
}