mirror of
https://github.com/nspcc-dev/neo-go.git
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2c3e92923f
PublicKey() for PrivateKey now just can't fail and it makes no sense to return an error from it. There is a lot of associated functionality for which this also is true, so adjust it accordingly and simplify a lot of code.
108 lines
2.2 KiB
Go
108 lines
2.2 KiB
Go
package keys
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import (
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"bytes"
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"fmt"
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"github.com/CityOfZion/neo-go/pkg/crypto"
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)
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const (
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// WIFVersion is the version used to decode and encode WIF keys.
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WIFVersion = 0x80
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)
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// WIF represents a wallet import format.
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type WIF struct {
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// Version of the wallet import format. Default to 0x80.
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Version byte
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// Bool to determine if the WIF is compressed or not.
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Compressed bool
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// A reference to the PrivateKey which this WIF is created from.
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PrivateKey *PrivateKey
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// The string representation of the WIF.
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S string
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}
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// WIFEncode encodes the given private key into a WIF string.
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func WIFEncode(key []byte, version byte, compressed bool) (s string, err error) {
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if version == 0x00 {
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version = WIFVersion
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}
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if len(key) != 32 {
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return s, fmt.Errorf("invalid private key length: %d", len(key))
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}
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buf := new(bytes.Buffer)
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buf.WriteByte(version)
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buf.Write(key)
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if compressed {
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buf.WriteByte(0x01)
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}
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s = crypto.Base58CheckEncode(buf.Bytes())
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return
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}
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// WIFDecode decoded the given WIF string into a WIF struct.
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func WIFDecode(wif string, version byte) (*WIF, error) {
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b, err := crypto.Base58CheckDecode(wif)
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if err != nil {
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return nil, err
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}
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if version == 0x00 {
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version = WIFVersion
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}
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if b[0] != version {
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return nil, fmt.Errorf("invalid WIF version got %d, expected %d", b[0], version)
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}
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// Derive the PrivateKey.
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privKey, err := NewPrivateKeyFromBytes(b[1:33])
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if err != nil {
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return nil, err
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}
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w := &WIF{
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Version: version,
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PrivateKey: privKey,
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S: wif,
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}
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// This is an uncompressed WIF
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if len(b) == 33 {
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w.Compressed = false
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return w, nil
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}
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if len(b) != 34 {
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return nil, fmt.Errorf("invalid WIF length: %d expecting 34", len(b))
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}
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// Check the compression flag.
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if b[33] != 0x01 {
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return nil, fmt.Errorf("invalid compression flag %d expecting %d", b[34], 0x01)
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}
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w.Compressed = true
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return w, nil
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}
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// GetVerificationScript returns NEO VM bytecode with checksig command for the public key.
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func (wif WIF) GetVerificationScript() []byte {
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const (
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pushbytes33 = 0x21
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checksig = 0xac
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)
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var (
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vScript []byte
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pubkey *PublicKey
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)
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pubkey = wif.PrivateKey.PublicKey()
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vScript = append([]byte{pushbytes33}, pubkey.Bytes()...)
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vScript = append(vScript, checksig)
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return vScript
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}
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