| /* |
| * Licensed to the Apache Software Foundation (ASF) under one |
| * or more contributor license agreements. See the NOTICE file |
| * distributed with this work for additional information |
| * regarding copyright ownership. The ASF licenses this file |
| * to you 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. |
| */ |
| |
| declare const persistedValueBrand: unique symbol; |
| |
| /** |
| * An untrusted value read from durable state for the domain type `T`. |
| * |
| * The function-valued brand keeps `T` invariant, so related domain types |
| * cannot be substituted across persistence seams. The value has no runtime |
| * wrapper: a persistence adapter marks the raw value, and a decoder is the |
| * only intended place that casts it back to `unknown` for inspection. |
| */ |
| export type PersistedValue<T> = { |
| readonly [persistedValueBrand]: (value: T) => T; |
| }; |
| |
| /** Mark an untrusted value at the point where durable state enters the process. */ |
| export function markPersisted<T>(value: unknown): PersistedValue<T> { |
| return value as PersistedValue<T>; |
| } |
