TpyKV | /src/kv.ts | tpy@v1.0.0-RC

method TpyKV.prototype.transact

import { TpyKV } from "https://deno.land/x/tpy@v1.0.0-RC/src/kv.ts";

transact<T extends Json>(key: string, transaction: (prev: T | undefined) => T | undefined): Promise<T | undefined>

A higher level alternative to cas. Updates a key, using the specified transaction function.

Type Parameters

T extends Json

key: string

The key to compare and set.

transaction: (prev: T | undefined) => T | undefined

A function that mutates the value, returning the value that should be set to key.

Promise<T | undefined>