neoneo-go/pkg/smartcontract/contract.go
Roman Khimov b77e533d13 crypto/wallet: move public/private key into the new keys package
And drop associated _pkg.dev remnants (refs. #307).

Original `dev` branch had two separate packages for public and private keys,
but those are so intertwined (`TestHelper` subpackage is a proof) that it's
better unite them and all associated code (like WIF and NEP-2) in one
package. This patch also:
 * creates internal `keytestcases` package to share things with wallet (maybe
   it'll be changed in some future)
 * ports some tests from `dev`
 * ports Verify() method for public key from `dev`
 * expands TestPrivateKey() with public key check
2019-08-27 17:45:51 +03:00

42 lines
1.1 KiB
Go

package smartcontract
import (
"bytes"
"fmt"
"sort"
"github.com/CityOfZion/neo-go/pkg/crypto/keys"
"github.com/CityOfZion/neo-go/pkg/vm"
)
// CreateMultiSigRedeemScript will create a script runnable by the VM.
func CreateMultiSigRedeemScript(m int, publicKeys keys.PublicKeys) ([]byte, error) {
if m <= 1 {
return nil, fmt.Errorf("param m cannot be smaller or equal to 1 got %d", m)
}
if m > len(publicKeys) {
return nil, fmt.Errorf("length of the signatures (%d) is higher then the number of public keys", m)
}
if m > 1024 {
return nil, fmt.Errorf("public key count %d exceeds maximum of length 1024", len(publicKeys))
}
buf := new(bytes.Buffer)
if err := vm.EmitInt(buf, int64(m)); err != nil {
return nil, err
}
sort.Sort(publicKeys)
for _, pubKey := range publicKeys {
if err := vm.EmitBytes(buf, pubKey.Bytes()); err != nil {
return nil, err
}
}
if err := vm.EmitInt(buf, int64(len(publicKeys))); err != nil {
return nil, err
}
if err := vm.EmitOpcode(buf, vm.CHECKMULTISIG); err != nil {
return nil, err
}
return buf.Bytes(), nil
}