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vm: convert items to UTF-8 strings

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Add `stackitem.ToString` for seamless string conversion.
This commit is contained in:
Evgenii Stratonikov 2020-07-29 11:18:51 +03:00
parent 82692d8d21
commit f40aba4cd0
9 changed files with 41 additions and 26 deletions
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18
pkg/core/interop_system.go
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@ -7,7 +7,6 @@ import (
"math"
"math/big"
"strings"
"unicode/utf8"
"github.com/nspcc-dev/neo-go/pkg/core/block"
"github.com/nspcc-dev/neo-go/pkg/core/blockchainer"
@ -265,13 +264,10 @@ func runtimeGetTrigger(ic *interop.Context, v *vm.VM) error {
// runtimeNotify should pass stack item to the notify plugin to handle it, but
// in neo-go the only meaningful thing to do here is to log.
func runtimeNotify(ic *interop.Context, v *vm.VM) error {
name := v.Estack().Pop().Bytes()
name := v.Estack().Pop().String()
if len(name) > MaxEventNameLen {
return fmt.Errorf("event name must be less than %d", MaxEventNameLen)
}
if !utf8.Valid(name) {
return errors.New("event name should be UTF8-encoded")
}
elem := v.Estack().Pop()
args := elem.Array()
// But it has to be serializable, otherwise we either have some broken
@ -285,7 +281,7 @@ func runtimeNotify(ic *interop.Context, v *vm.VM) error {
}
ne := state.NotificationEvent{
ScriptHash: v.GetCurrentScriptHash(),
Name: string(name),
Name: name,
Item: stackitem.NewArray(args),
}
ic.Notifications = append(ic.Notifications, ne)
@ -294,13 +290,10 @@ func runtimeNotify(ic *interop.Context, v *vm.VM) error {
// runtimeLog logs the message passed.
func runtimeLog(ic *interop.Context, v *vm.VM) error {
state := v.Estack().Pop().Bytes()
state := v.Estack().Pop().String()
if len(state) > MaxNotificationSize {
return fmt.Errorf("message length shouldn't exceed %v", MaxNotificationSize)
}
if !utf8.Valid(state) {
return errors.New("log message should be UTF8-encoded")
}
msg := fmt.Sprintf("%q", state)
ic.Log.Info("runtime log",
zap.Stringer("script", v.GetCurrentScriptHash()),
@ -490,11 +483,10 @@ func contractCallExInternal(ic *interop.Context, v *vm.VM, h []byte, method stac
if err != nil {
return errors.New("contract not found")
}
bs, err := method.TryBytes()
name, err := stackitem.ToString(method)
if err != nil {
return err
}
name := string(bs)
if strings.HasPrefix(name, "_") {
return errors.New("invalid method name (starts with '_')")
}
@ -504,7 +496,7 @@ func contractCallExInternal(ic *interop.Context, v *vm.VM, h []byte, method stac
}
curr, err := ic.DAO.GetContractState(v.GetCurrentScriptHash())
if err == nil {
if !curr.Manifest.CanCall(&cs.Manifest, string(bs)) {
if !curr.Manifest.CanCall(&cs.Manifest, name) {
return errors.New("disallowed method call")
}
}