From a86e1910e14583fd45a324a2ef0eb12190aec633 Mon Sep 17 00:00:00 2001
From: Evgenii Stratonikov <evgeniy@nspcc.ru>
Date: Wed, 10 Jun 2020 14:36:17 +0300
Subject: [PATCH] core: remove unused interops

Missed in #1040.
---
 pkg/core/interop_system.go | 56 --------------------------------------
 1 file changed, 56 deletions(-)

diff --git a/pkg/core/interop_system.go b/pkg/core/interop_system.go
index 09239598b..285060312 100644
--- a/pkg/core/interop_system.go
+++ b/pkg/core/interop_system.go
@@ -179,62 +179,6 @@ func bcGetTransactionHeight(ic *interop.Context, v *vm.VM) error {
 	return nil
 }
 
-// popHeaderFromVM returns pointer to Header or error. It's main feature is
-// proper treatment of Block structure, because C# code implicitly assumes
-// that header APIs can also operate on blocks.
-func popHeaderFromVM(v *vm.VM) (*block.Header, error) {
-	iface := v.Estack().Pop().Value()
-	header, ok := iface.(*block.Header)
-	if !ok {
-		block, ok := iface.(*block.Block)
-		if !ok {
-			return nil, errors.New("value is not a header or block")
-		}
-		return block.Header(), nil
-	}
-	return header, nil
-}
-
-// headerGetIndex returns block index from the header.
-func headerGetIndex(ic *interop.Context, v *vm.VM) error {
-	header, err := popHeaderFromVM(v)
-	if err != nil {
-		return err
-	}
-	v.Estack().PushVal(header.Index)
-	return nil
-}
-
-// headerGetHash returns header hash of the passed header.
-func headerGetHash(ic *interop.Context, v *vm.VM) error {
-	header, err := popHeaderFromVM(v)
-	if err != nil {
-		return err
-	}
-	v.Estack().PushVal(header.Hash().BytesBE())
-	return nil
-}
-
-// headerGetPrevHash returns previous header hash of the passed header.
-func headerGetPrevHash(ic *interop.Context, v *vm.VM) error {
-	header, err := popHeaderFromVM(v)
-	if err != nil {
-		return err
-	}
-	v.Estack().PushVal(header.PrevHash.BytesBE())
-	return nil
-}
-
-// headerGetTimestamp returns timestamp of the passed header.
-func headerGetTimestamp(ic *interop.Context, v *vm.VM) error {
-	header, err := popHeaderFromVM(v)
-	if err != nil {
-		return err
-	}
-	v.Estack().PushVal(header.Timestamp)
-	return nil
-}
-
 // engineGetScriptContainer returns transaction that contains the script being
 // run.
 func engineGetScriptContainer(ic *interop.Context, v *vm.VM) error {