frostfs-sdk-go/owner/wallet.go
Evgenii Stratonikov a2d342e928 [#87] go.mod: remove neo-go dependency
Signed-off-by: Evgenii Stratonikov <evgeniy@nspcc.ru>
2021-11-22 15:40:13 +03:00

72 lines
1.5 KiB
Go

package owner
import (
"crypto/ecdsa"
"crypto/elliptic"
"crypto/sha256"
"errors"
"github.com/mr-tron/base58"
"golang.org/x/crypto/ripemd160"
)
// NEO3Wallet represents NEO3 wallet address.
type NEO3Wallet [NEO3WalletSize]byte
// NEO3WalletSize contains size of neo3 wallet.
const NEO3WalletSize = 25
const addressPrefixN3 = 0x35
// ErrEmptyPublicKey when PK passed to Verify method is nil.
var ErrEmptyPublicKey = errors.New("empty public key")
// NEO3WalletFromPublicKey converts public key to NEO3 wallet address.
func NEO3WalletFromPublicKey(key *ecdsa.PublicKey) (*NEO3Wallet, error) {
if key == nil {
return nil, ErrEmptyPublicKey
}
b := elliptic.MarshalCompressed(key.Curve, key.X, key.Y)
script := []byte{0x0C /* PUSHDATA1 */, byte(len(b)) /* 33 */}
script = append(script, b...)
script = append(script, 0x41 /* SYSCALL */)
h := sha256.Sum256([]byte("System.Crypto.CheckSig"))
script = append(script, h[:4]...)
h1 := sha256.Sum256(script)
rw := ripemd160.New()
rw.Write(h1[:])
h160 := rw.Sum(nil)
var w NEO3Wallet
w[0] = addressPrefixN3
copy(w[1:21], h160)
copy(w[21:], addressChecksum(w[:21]))
return &w, nil
}
func addressChecksum(data []byte) []byte {
h1 := sha256.Sum256(data)
h2 := sha256.Sum256(h1[:])
return h2[:4]
}
// String implements fmt.Stringer.
func (w *NEO3Wallet) String() string {
if w != nil {
return base58.Encode(w[:])
}
return ""
}
// Bytes returns slice of NEO3 wallet address bytes.
func (w *NEO3Wallet) Bytes() []byte {
if w != nil {
return w[:]
}
return nil
}