Class MomentoChatMessageHistory

A class that stores chat message history using Momento Cache. It interacts with a Momento cache client to perform operations like fetching, adding, and deleting messages.

Example

const chatHistory = await MomentoChatMessageHistory.fromProps({
  client: new CacheClient({
    configuration: Configurations.Laptop.v1(),
    credentialProvider: CredentialProvider.fromEnvironmentVariable({
      environmentVariableName: "MOMENTO_API_KEY",
    }),
    defaultTtlSeconds: 60 * 60 * 24,
  }),
  cacheName: "langchain",
  sessionId: new Date().toISOString(),
  sessionTtl: 300,
});

const messages = await chatHistory.getMessages();
console.log({ messages });
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