106 lines
3.1 KiB
Go
106 lines
3.1 KiB
Go
package transaction
|
|
|
|
//go:generate stringer -type=WitnessScope -output=witness_scope_string.go
|
|
import (
|
|
"encoding/json"
|
|
"fmt"
|
|
"strings"
|
|
)
|
|
|
|
// WitnessScope represents set of witness flags for Transaction signer.
|
|
type WitnessScope byte
|
|
|
|
const (
|
|
// FeeOnly is only valid for a sender, it can't be used during the execution.
|
|
FeeOnly WitnessScope = 0
|
|
// CalledByEntry means that this condition must hold: EntryScriptHash == CallingScriptHash.
|
|
// No params is needed, as the witness/permission/signature given on first invocation will
|
|
// automatically expire if entering deeper internal invokes. This can be default safe
|
|
// choice for native NEO/GAS (previously used on Neo 2 as "attach" mode).
|
|
CalledByEntry WitnessScope = 0x01
|
|
// CustomContracts define custom hash for contract-specific.
|
|
CustomContracts WitnessScope = 0x10
|
|
// CustomGroups define custom pubkey for group members.
|
|
CustomGroups WitnessScope = 0x20
|
|
// Global allows this witness in all contexts (default Neo2 behavior).
|
|
// This cannot be combined with other flags.
|
|
Global WitnessScope = 0x80
|
|
)
|
|
|
|
// ScopesFromString converts string of comma-separated scopes to a set of scopes
|
|
// (case-sensitive). String can combine several scopes, e.g. be any of: 'Global',
|
|
// 'CalledByEntry,CustomGroups' etc. In case of an empty string an error will be
|
|
// returned.
|
|
func ScopesFromString(s string) (WitnessScope, error) {
|
|
var result WitnessScope
|
|
scopes := strings.Split(s, ",")
|
|
for i, scope := range scopes {
|
|
scopes[i] = strings.TrimSpace(scope)
|
|
}
|
|
dict := map[string]WitnessScope{
|
|
Global.String(): Global,
|
|
CalledByEntry.String(): CalledByEntry,
|
|
CustomContracts.String(): CustomContracts,
|
|
CustomGroups.String(): CustomGroups,
|
|
FeeOnly.String(): FeeOnly,
|
|
}
|
|
var isGlobal bool
|
|
for _, scopeStr := range scopes {
|
|
scope, ok := dict[scopeStr]
|
|
if !ok {
|
|
return result, fmt.Errorf("invalid witness scope: %v", scopeStr)
|
|
}
|
|
if isGlobal && !(scope == Global) {
|
|
return result, fmt.Errorf("Global scope can not be combined with other scopes")
|
|
}
|
|
result |= scope
|
|
if scope == Global {
|
|
isGlobal = true
|
|
}
|
|
}
|
|
return result, nil
|
|
}
|
|
|
|
// scopesToString converts witness scope to it's string representation. It uses
|
|
// `, ` to separate scope names.
|
|
func scopesToString(scopes WitnessScope) string {
|
|
if scopes&Global != 0 || scopes == FeeOnly {
|
|
return scopes.String()
|
|
}
|
|
var res string
|
|
if scopes&CalledByEntry != 0 {
|
|
res = CalledByEntry.String()
|
|
}
|
|
if scopes&CustomContracts != 0 {
|
|
if len(res) != 0 {
|
|
res += ", "
|
|
}
|
|
res += CustomContracts.String()
|
|
}
|
|
if scopes&CustomGroups != 0 {
|
|
if len(res) != 0 {
|
|
res += ", "
|
|
}
|
|
res += CustomGroups.String()
|
|
}
|
|
return res
|
|
}
|
|
|
|
// MarshalJSON implements json.Marshaler interface.
|
|
func (s WitnessScope) MarshalJSON() ([]byte, error) {
|
|
return []byte(`"` + scopesToString(s) + `"`), nil
|
|
}
|
|
|
|
// UnmarshalJSON implements json.Unmarshaler interface.
|
|
func (s *WitnessScope) UnmarshalJSON(data []byte) error {
|
|
var js string
|
|
if err := json.Unmarshal(data, &js); err != nil {
|
|
return err
|
|
}
|
|
scopes, err := ScopesFromString(js)
|
|
if err != nil {
|
|
return err
|
|
}
|
|
*s = scopes
|
|
return nil
|
|
}
|