/
wallet.go
73 lines (54 loc) · 1.28 KB
/
wallet.go
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package wallet
import (
"crypto/ecdsa"
"crypto/elliptic"
"crypto/rand"
"crypto/sha256"
"log"
"golang.org/x/crypto/ripemd160"
)
const (
checksumLength = 4
version = byte(0x00)
)
type Wallet struct {
PrivateKey ecdsa.PrivateKey
PublicKey []byte
}
func (w Wallet) Address() []byte {
pubHash := PublicKeyHash(w.PublicKey)
versionedHash := append([]byte{version}, pubHash...)
checksum := Checksum(versionedHash)
fullHash := append(versionedHash, checksum...)
address := Base58Encode(fullHash)
return address
}
func NewKeyPair() (ecdsa.PrivateKey, []byte) {
curve := elliptic.P256()
private, err := ecdsa.GenerateKey(curve, rand.Reader)
if err != nil {
log.Panic(err)
}
pub := append(private.PublicKey.X.Bytes(), private.PublicKey.Y.Bytes()...)
return *private, pub
}
func MakeWallet() *Wallet {
private, public := NewKeyPair()
wallet := Wallet{private, public}
return &wallet
}
func PublicKeyHash(pubKey []byte) []byte {
pubHash := sha256.Sum256(pubKey)
hasher := ripemd160.New()
_, err := hasher.Write(pubHash[:])
if err != nil {
log.Panic(err)
}
publicRipMD := hasher.Sum(nil)
return publicRipMD
}
func Checksum(payload []byte) []byte {
firstHash := sha256.Sum256(payload)
secondHash := sha256.Sum256(firstHash[:])
return secondHash[:checksumLength]
}