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