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diff --git a/grpc/src/core/lib/channel/call_finalization.h b/grpc/src/core/lib/channel/call_finalization.h
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+// Copyright 2022 gRPC authors.
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//     http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+#ifndef GRPC_CORE_LIB_CHANNEL_CALL_FINALIZATION_H
+#define GRPC_CORE_LIB_CHANNEL_CALL_FINALIZATION_H
+
+#include <grpc/support/port_platform.h>
+
+#include "src/core/lib/channel/channel_stack.h"
+#include "src/core/lib/promise/context.h"
+#include "src/core/lib/resource_quota/arena.h"
+
+namespace grpc_core {
+
+// Call finalization context.
+// Sometimes a filter needs to perform some operation after the last byte of
+// data is flushed to the wire. This context is used to perform that
+// finalization.
+// Filters can register a finalizer by calling Add().
+// The finalizer will be called before the call is destroyed but after
+// the top level promise is completed.
+class CallFinalization {
+ public:
+  // Add a step to the finalization context.
+  // Takes a callable with a signature compatible with:
+  // (const grpc_call_final_info&) -> void.
+  // Finalizers are run in the reverse order they are added.
+  template <typename F>
+  void Add(F&& t) {
+    first_ =
+        GetContext<Arena>()->New<FuncFinalizer<F>>(std::forward<F>(t), first_);
+  }
+
+  void Run(const grpc_call_final_info* final_info) {
+    if (Finalizer* f = absl::exchange(first_, nullptr)) f->Run(final_info);
+  }
+
+ private:
+  // Base class for finalizer implementations.
+  class Finalizer {
+   public:
+    // Run the finalizer and call the destructor of this Finalizer.
+    virtual void Run(const grpc_call_final_info* final_info) = 0;
+
+   protected:
+    ~Finalizer() {}
+  };
+  // Specialization for callable objects.
+  template <typename F>
+  class FuncFinalizer final : public Finalizer {
+   public:
+    FuncFinalizer(F&& f, Finalizer* next)
+        : next_(next), f_(std::forward<F>(f)) {}
+
+    void Run(const grpc_call_final_info* final_info) override {
+      f_(final_info);
+      Finalizer* next = next_;
+      this->~FuncFinalizer();
+      if (next != nullptr) next->Run(final_info);
+    }
+
+   private:
+    Finalizer* next_;
+    F f_;
+  };
+  // The first finalizer in the chain.
+  Finalizer* first_ = nullptr;
+};
+
+template <>
+struct ContextType<CallFinalization> {};
+
+}  // namespace grpc_core
+
+#endif  // GRPC_CORE_LIB_CHANNEL_CALL_FINALIZATION_H