mirror of
https://github.com/nspcc-dev/neo-go.git
synced 2024-12-02 09:45:50 +00:00
33c512032f
Which matches the changes done in neo-storm and also make this codebase closer to the `dev` branch (that also uses Instruction).
42 lines
1.1 KiB
Go
42 lines
1.1 KiB
Go
package smartcontract
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import (
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"bytes"
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"fmt"
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"sort"
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"github.com/CityOfZion/neo-go/pkg/crypto"
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"github.com/CityOfZion/neo-go/pkg/vm"
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)
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// CreateMultiSigRedeemScript will create a script runnable by the VM.
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func CreateMultiSigRedeemScript(m int, publicKeys crypto.PublicKeys) ([]byte, error) {
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if m <= 1 {
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return nil, fmt.Errorf("param m cannot be smaller or equal to 1 got %d", m)
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}
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if m > len(publicKeys) {
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return nil, fmt.Errorf("length of the signatures (%d) is higher then the number of public keys", m)
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}
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if m > 1024 {
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return nil, fmt.Errorf("public key count %d exceeds maximum of length 1024", len(publicKeys))
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}
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buf := new(bytes.Buffer)
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if err := vm.EmitInt(buf, int64(m)); err != nil {
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return nil, err
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}
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sort.Sort(publicKeys)
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for _, pubKey := range publicKeys {
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if err := vm.EmitBytes(buf, pubKey.Bytes()); err != nil {
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return nil, err
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}
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}
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if err := vm.EmitInt(buf, int64(len(publicKeys))); err != nil {
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return nil, err
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}
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if err := vm.EmitOpcode(buf, vm.CHECKMULTISIG); err != nil {
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return nil, err
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}
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return buf.Bytes(), nil
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}
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