path: root/crypto/keypair.go

package crypto

import (
    "strings"

    "github.com/ethereum/go-ethereum/ethutil"
    "github.com/obscuren/secp256k1-go"
)

type KeyPair struct {
    PrivateKey []byte
    PublicKey  []byte
    address    []byte
    mnemonic   string
    // The associated account
    // account *StateObject
}

func GenerateNewKeyPair() *KeyPair {
    _, prv := secp256k1.GenerateKeyPair()
    keyPair, _ := NewKeyPairFromSec(prv) // swallow error, this one cannot err
    return keyPair
}

func NewKeyPairFromSec(seckey []byte) (*KeyPair, error) {
    pubkey, err := secp256k1.GeneratePubKey(seckey)
    if err != nil {
        return nil, err
    }

    return &KeyPair{PrivateKey: seckey, PublicKey: pubkey}, nil
}

func (k *KeyPair) Address() []byte {
    if k.address == nil {
        k.address = Sha3(k.PublicKey[1:])[12:]
    }
    return k.address
}

func (k *KeyPair) Mnemonic() string {
    if k.mnemonic == "" {
        k.mnemonic = strings.Join(MnemonicEncode(ethutil.Bytes2Hex(k.PrivateKey)), " ")
    }
    return k.mnemonic
}

func (k *KeyPair) AsStrings() (string, string, string, string) {
    return k.Mnemonic(), ethutil.Bytes2Hex(k.Address()), ethutil.Bytes2Hex(k.PrivateKey), ethutil.Bytes2Hex(k.PublicKey)
}

func (k *KeyPair) RlpEncode() []byte {
    return k.RlpValue().Encode()
}

func (k *KeyPair) RlpValue() *ethutil.Value {
    return ethutil.NewValue(k.PrivateKey)
}