chatgpt-api/src/types.ts

import Keyv from 'keyv'

export type Role = 'user' | 'assistant' | 'system'

export type FetchFn = typeof fetch

export type ChatGPTAPIOptions = {
  apiKey: string

  /** @defaultValue `'https://api.openai.com'` **/
  apiBaseUrl?: string

  /** @defaultValue `false` **/
  debug?: boolean

  completionParams?: Partial<
    Omit<openai.CreateChatCompletionRequest, 'messages' | 'n' | 'stream'>
  >

  systemMessage?: string

  /** @defaultValue `4096` **/
  maxModelTokens?: number

  /** @defaultValue `1000` **/
  maxResponseTokens?: number

  messageStore?: Keyv
  getMessageById?: GetMessageByIdFunction
  upsertMessage?: UpsertMessageFunction

  fetch?: FetchFn
}

export type SendMessageOptions = {
  /** The name of a user in a multi-user chat. */
  name?: string
  parentMessageId?: string
  messageId?: string
  stream?: boolean
  systemMessage?: string
  timeoutMs?: number
  onProgress?: (partialResponse: ChatMessage) => void
  abortSignal?: AbortSignal
  completionParams?: Partial<
    Omit<openai.CreateChatCompletionRequest, 'messages' | 'n' | 'stream'>
  >
}

export type MessageActionType = 'next' | 'variant'

export type SendMessageBrowserOptions = {
  conversationId?: string
  parentMessageId?: string
  messageId?: string
  action?: MessageActionType
  timeoutMs?: number
  onProgress?: (partialResponse: ChatMessage) => void
  abortSignal?: AbortSignal
}

interface CreateChatCompletionStreamResponse
  extends openai.CreateChatCompletionDeltaResponse {
  usage: CreateCompletionStreamResponseUsage
}

interface CreateCompletionStreamResponseUsage
  extends openai.CreateCompletionResponseUsage {
  estimated: true
}

export interface ChatMessage {
  id: string
  text: string
  role: Role
  name?: string
  delta?: string
  detail?:
    | openai.CreateChatCompletionResponse
    | CreateChatCompletionStreamResponse

  // relevant for both ChatGPTAPI and ChatGPTUnofficialProxyAPI
  parentMessageId?: string
  // only relevant for ChatGPTUnofficialProxyAPI
  conversationId?: string
}

export class ChatGPTError extends Error {
  statusCode?: number
  statusText?: string
  isFinal?: boolean
  accountId?: string
}

/** Returns a chat message from a store by it's ID (or null if not found). */
export type GetMessageByIdFunction = (id: string) => Promise<ChatMessage>

/** Upserts a chat message to a store. */
export type UpsertMessageFunction = (message: ChatMessage) => Promise<void>

/**
 * https://chat.openapi.com/backend-api/conversation
 */
export type ConversationJSONBody = {
  /**
   * The action to take
   */
  action: string

  /**
   * The ID of the conversation
   */
  conversation_id?: string

  /**
   * Prompts to provide
   */
  messages: Prompt[]

  /**
   * The model to use
   */
  model: string

  /**
   * The parent message ID
   */
  parent_message_id: string
}

export type Prompt = {
  /**
   * The content of the prompt
   */
  content: PromptContent

  /**
   * The ID of the prompt
   */
  id: string

  /**
   * The role played in the prompt
   */
  role: Role
}

export type ContentType = 'text'

export type PromptContent = {
  /**
   * The content type of the prompt
   */
  content_type: ContentType

  /**
   * The parts to the prompt
   */
  parts: string[]
}

export type ConversationResponseEvent = {
  message?: Message
  conversation_id?: string
  error?: string | null
}

export type Message = {
  id: string
  content: MessageContent
  role: Role
  user: string | null
  create_time: string | null
  update_time: string | null
  end_turn: null
  weight: number
  recipient: string
  metadata: MessageMetadata
}

export type MessageContent = {
  content_type: string
  parts: string[]
}

export type MessageMetadata = any

export namespace openai {
  export interface CreateChatCompletionDeltaResponse {
    id: string
    object: 'chat.completion.chunk'
    created: number
    model: string
    choices: [
      {
        delta: {
          role: Role
          content?: string
        }
        index: number
        finish_reason: string | null
      }
    ]
  }

  /**
   *
   * @export
   * @interface ChatCompletionRequestMessage
   */
  export interface ChatCompletionRequestMessage {
    /**
     * The role of the author of this message.
     * @type {string}
     * @memberof ChatCompletionRequestMessage
     */
    role: ChatCompletionRequestMessageRoleEnum
    /**
     * The contents of the message
     * @type {string}
     * @memberof ChatCompletionRequestMessage
     */
    content: string
    /**
     * The name of the user in a multi-user chat
     * @type {string}
     * @memberof ChatCompletionRequestMessage
     */
    name?: string
  }
  export declare const ChatCompletionRequestMessageRoleEnum: {
    readonly System: 'system'
    readonly User: 'user'
    readonly Assistant: 'assistant'
  }
  export declare type ChatCompletionRequestMessageRoleEnum =
    (typeof ChatCompletionRequestMessageRoleEnum)[keyof typeof ChatCompletionRequestMessageRoleEnum]
  /**
   *
   * @export
   * @interface ChatCompletionResponseMessage
   */
  export interface ChatCompletionResponseMessage {
    /**
     * The role of the author of this message.
     * @type {string}
     * @memberof ChatCompletionResponseMessage
     */
    role: ChatCompletionResponseMessageRoleEnum
    /**
     * The contents of the message
     * @type {string}
     * @memberof ChatCompletionResponseMessage
     */
    content: string
  }
  export declare const ChatCompletionResponseMessageRoleEnum: {
    readonly System: 'system'
    readonly User: 'user'
    readonly Assistant: 'assistant'
  }
  export declare type ChatCompletionResponseMessageRoleEnum =
    (typeof ChatCompletionResponseMessageRoleEnum)[keyof typeof ChatCompletionResponseMessageRoleEnum]
  /**
   *
   * @export
   * @interface CreateChatCompletionRequest
   */
  export interface CreateChatCompletionRequest {
    /**
     * ID of the model to use. Currently, only `gpt-3.5-turbo` and `gpt-3.5-turbo-0301` are supported.
     * @type {string}
     * @memberof CreateChatCompletionRequest
     */
    model: string
    /**
     * The messages to generate chat completions for, in the [chat format](/docs/guides/chat/introduction).
     * @type {Array<ChatCompletionRequestMessage>}
     * @memberof CreateChatCompletionRequest
     */
    messages: Array<ChatCompletionRequestMessage>
    /**
     * What sampling temperature to use, between 0 and 2. Higher values like 0.8 will make the output more random, while lower values like 0.2 will make it more focused and deterministic.  We generally recommend altering this or `top_p` but not both.
     * @type {number}
     * @memberof CreateChatCompletionRequest
     */
    temperature?: number | null
    /**
     * An alternative to sampling with temperature, called nucleus sampling, where the model considers the results of the tokens with top_p probability mass. So 0.1 means only the tokens comprising the top 10% probability mass are considered.  We generally recommend altering this or `temperature` but not both.
     * @type {number}
     * @memberof CreateChatCompletionRequest
     */
    top_p?: number | null
    /**
     * How many chat completion choices to generate for each input message.
     * @type {number}
     * @memberof CreateChatCompletionRequest
     */
    n?: number | null
    /**
     * If set, partial message deltas will be sent, like in ChatGPT. Tokens will be sent as data-only [server-sent events](https://developer.mozilla.org/en-US/docs/Web/API/Server-sent_events/Using_server-sent_events#Event_stream_format) as they become available, with the stream terminated by a `data: [DONE]` message.
     * @type {boolean}
     * @memberof CreateChatCompletionRequest
     */
    stream?: boolean | null
    /**
     *
     * @type {CreateChatCompletionRequestStop}
     * @memberof CreateChatCompletionRequest
     */
    stop?: CreateChatCompletionRequestStop
    /**
     * The maximum number of tokens allowed for the generated answer. By default, the number of tokens the model can return will be (4096 - prompt tokens).
     * @type {number}
     * @memberof CreateChatCompletionRequest
     */
    max_tokens?: number
    /**
     * Number between -2.0 and 2.0. Positive values penalize new tokens based on whether they appear in the text so far, increasing the model\'s likelihood to talk about new topics.  [See more information about frequency and presence penalties.](/docs/api-reference/parameter-details)
     * @type {number}
     * @memberof CreateChatCompletionRequest
     */
    presence_penalty?: number | null
    /**
     * Number between -2.0 and 2.0. Positive values penalize new tokens based on their existing frequency in the text so far, decreasing the model\'s likelihood to repeat the same line verbatim.  [See more information about frequency and presence penalties.](/docs/api-reference/parameter-details)
     * @type {number}
     * @memberof CreateChatCompletionRequest
     */
    frequency_penalty?: number | null
    /**
     * Modify the likelihood of specified tokens appearing in the completion.  Accepts a json object that maps tokens (specified by their token ID in the tokenizer) to an associated bias value from -100 to 100. Mathematically, the bias is added to the logits generated by the model prior to sampling. The exact effect will vary per model, but values between -1 and 1 should decrease or increase likelihood of selection; values like -100 or 100 should result in a ban or exclusive selection of the relevant token.
     * @type {object}
     * @memberof CreateChatCompletionRequest
     */
    logit_bias?: object | null
    /**
     * A unique identifier representing your end-user, which can help OpenAI to monitor and detect abuse. [Learn more](/docs/guides/safety-best-practices/end-user-ids).
     * @type {string}
     * @memberof CreateChatCompletionRequest
     */
    user?: string
  }
  /**
   * @type CreateChatCompletionRequestStop
   * Up to 4 sequences where the API will stop generating further tokens.
   * @export
   */
  export declare type CreateChatCompletionRequestStop = Array<string> | string
  /**
   *
   * @export
   * @interface CreateChatCompletionResponse
   */
  export interface CreateChatCompletionResponse {
    /**
     *
     * @type {string}
     * @memberof CreateChatCompletionResponse
     */
    id: string
    /**
     *
     * @type {string}
     * @memberof CreateChatCompletionResponse
     */
    object: string
    /**
     *
     * @type {number}
     * @memberof CreateChatCompletionResponse
     */
    created: number
    /**
     *
     * @type {string}
     * @memberof CreateChatCompletionResponse
     */
    model: string
    /**
     *
     * @type {Array<CreateChatCompletionResponseChoicesInner>}
     * @memberof CreateChatCompletionResponse
     */
    choices: Array<CreateChatCompletionResponseChoicesInner>
    /**
     *
     * @type {CreateCompletionResponseUsage}
     * @memberof CreateChatCompletionResponse
     */
    usage?: CreateCompletionResponseUsage
  }
  /**
   *
   * @export
   * @interface CreateChatCompletionResponseChoicesInner
   */
  export interface CreateChatCompletionResponseChoicesInner {
    /**
     *
     * @type {number}
     * @memberof CreateChatCompletionResponseChoicesInner
     */
    index?: number
    /**
     *
     * @type {ChatCompletionResponseMessage}
     * @memberof CreateChatCompletionResponseChoicesInner
     */
    message?: ChatCompletionResponseMessage
    /**
     *
     * @type {string}
     * @memberof CreateChatCompletionResponseChoicesInner
     */
    finish_reason?: string
  }
  /**
   *
   * @export
   * @interface CreateCompletionResponseUsage
   */
  export interface CreateCompletionResponseUsage {
    /**
     *
     * @type {number}
     * @memberof CreateCompletionResponseUsage
     */
    prompt_tokens: number
    /**
     *
     * @type {number}
     * @memberof CreateCompletionResponseUsage
     */
    completion_tokens: number
    /**
     *
     * @type {number}
     * @memberof CreateCompletionResponseUsage
     */
    total_tokens: number
  }
}