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core: implement System.Callback.CreateFromMethod interop

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Support creating callbacks from contract methods.

Signed-off-by: Evgenii Stratonikov <evgeniy@nspcc.ru>
This commit is contained in:
Evgenii Stratonikov 2020-07-27 12:23:48 +03:00
parent f96c217aba
commit c54b45e76d
4 changed files with 132 additions and 3 deletions
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11
pkg/core/interop/callback/callback.go
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@ -5,6 +5,7 @@ import (
"github.com/nspcc-dev/neo-go/pkg/core/interop"
"github.com/nspcc-dev/neo-go/pkg/vm"
"github.com/nspcc-dev/neo-go/pkg/vm/emit"
"github.com/nspcc-dev/neo-go/pkg/vm/stackitem"
)
@ -17,12 +18,18 @@ type Callback interface {
}
// Invoke invokes provided callback.
func Invoke(_ *interop.Context, v *vm.VM) error {
func Invoke(ic *interop.Context, v *vm.VM) error {
cb := v.Estack().Pop().Interop().Value().(Callback)
args := v.Estack().Pop().Array()
if cb.ArgCount() != len(args) {
return errors.New("invalid argument count")
}
cb.LoadContext(v, args)
return nil
switch cb.(type) {
case *MethodCallback:
id := emit.InteropNameToID([]byte("System.Contract.Call"))
return ic.SyscallHandler(v, id)
default:
return nil
}
}