type ArgumentsType<T> = T extends (...args: infer A) => any ? A : never;
type ReturnType<T> = T extends (...args: any) => infer R ? R : never;
type PromisifyFn<T> = ReturnType<T> extends Promise<any> ? T : (...args: ArgumentsType<T>) => Promise<Awaited<ReturnType<T>>>;
type Thenable<T> = T | PromiseLike<T>;
type BirpcResolver<This> = (this: This, name: string, resolved: (...args: unknown[]) => unknown) => Thenable<((...args: any[]) => any) | undefined>;
interface ChannelOptions {
    /**
     * Function to post raw message
     */
    post: (data: any, ...extras: any[]) => any | Promise<any>;
    /**
     * Listener to receive raw message
     */
    on: (fn: (data: any, ...extras: any[]) => void) => any | Promise<any>;
    /**
     * Clear the listener when `$close` is called
     */
    off?: (fn: (data: any, ...extras: any[]) => void) => any | Promise<any>;
    /**
     * Custom function to serialize data
     *
     * by default it passes the data as-is
     */
    serialize?: (data: any) => any;
    /**
     * Custom function to deserialize data
     *
     * by default it passes the data as-is
     */
    deserialize?: (data: any) => any;
    /**
     * Call the methods with the RPC context or the original functions object
     */
    bind?: 'rpc' | 'functions';
    /**
     * Custom meta data to attached to the RPC instance's `$meta` property
     */
    meta?: any;
}
interface EventOptions<RemoteFunctions, LocalFunctions extends object = Record<string, never>> {
    /**
     * Names of remote functions that do not need response.
     */
    eventNames?: (keyof RemoteFunctions)[];
    /**
     * Maximum timeout for waiting for response, in milliseconds.
     *
     * @default 60_000
     */
    timeout?: number;
    /**
     * Custom resolver to resolve function to be called
     *
     * For advanced use cases only
     */
    resolver?: BirpcResolver<BirpcReturn<RemoteFunctions, LocalFunctions>>;
    /**
     * Hook triggered before an event is sent to the remote
     *
     * @param req - Request parameters
     * @param next - Function to continue the request
     * @param resolve - Function to resolve the response directly
     */
    onRequest?: (this: BirpcReturn<RemoteFunctions, LocalFunctions>, req: Request, next: (req?: Request) => Promise<any>, resolve: (res: any) => void) => void | Promise<void>;
    /**
     * Custom error handler
     *
     * @deprecated use `onFunctionError` and `onGeneralError` instead
     */
    onError?: (this: BirpcReturn<RemoteFunctions, LocalFunctions>, error: Error, functionName: string, args: any[]) => boolean | void;
    /**
     * Custom error handler for errors occurred in local functions being called
     *
     * @returns `true` to prevent the error from being thrown
     */
    onFunctionError?: (this: BirpcReturn<RemoteFunctions, LocalFunctions>, error: Error, functionName: string, args: any[]) => boolean | void;
    /**
     * Custom error handler for errors occurred during serialization or messsaging
     *
     * @returns `true` to prevent the error from being thrown
     */
    onGeneralError?: (this: BirpcReturn<RemoteFunctions, LocalFunctions>, error: Error, functionName?: string, args?: any[]) => boolean | void;
    /**
     * Custom error handler for timeouts
     *
     * @returns `true` to prevent the error from being thrown
     */
    onTimeoutError?: (this: BirpcReturn<RemoteFunctions, LocalFunctions>, functionName: string, args: any[]) => boolean | void;
}
type BirpcOptions<RemoteFunctions, LocalFunctions extends object = Record<string, never>> = EventOptions<RemoteFunctions, LocalFunctions> & ChannelOptions;
type BirpcFn<T> = PromisifyFn<T> & {
    /**
     * Send event without asking for response
     */
    asEvent: (...args: ArgumentsType<T>) => Promise<void>;
};
interface BirpcGroupFn<T> {
    /**
     * Call the remote function and wait for the result.
     */
    (...args: ArgumentsType<T>): Promise<Awaited<ReturnType<T>>[]>;
    /**
     * Send event without asking for response
     */
    asEvent: (...args: ArgumentsType<T>) => Promise<void>;
}
interface BirpcReturnBuiltin<RemoteFunctions, LocalFunctions = Record<string, never>> {
    /**
     * Raw functions object
     */
    $functions: LocalFunctions;
    /**
     * Whether the RPC is closed
     */
    readonly $closed: boolean;
    /**
     * Custom meta data attached to the RPC instance
     */
    readonly $meta: any;
    /**
     * Close the RPC connection
     */
    $close: (error?: Error) => void;
    /**
     * Reject pending calls
     */
    $rejectPendingCalls: (handler?: PendingCallHandler) => Promise<void>[];
    /**
     * Call the remote function and wait for the result.
     * An alternative to directly calling the function
     */
    $call: <K extends keyof RemoteFunctions>(method: K, ...args: ArgumentsType<RemoteFunctions[K]>) => Promise<Awaited<ReturnType<RemoteFunctions[K]>>>;
    /**
     * Same as `$call`, but returns `undefined` if the function is not defined on the remote side.
     */
    $callOptional: <K extends keyof RemoteFunctions>(method: K, ...args: ArgumentsType<RemoteFunctions[K]>) => Promise<Awaited<ReturnType<RemoteFunctions[K]> | undefined>>;
    /**
     * Send event without asking for response
     */
    $callEvent: <K extends keyof RemoteFunctions>(method: K, ...args: ArgumentsType<RemoteFunctions[K]>) => Promise<void>;
    /**
     * Call the remote function with the raw options.
     */
    $callRaw: (options: {
        method: string;
        args: unknown[];
        event?: boolean;
        optional?: boolean;
    }) => Promise<Awaited<ReturnType<any>>[]>;
}
type BirpcReturn<RemoteFunctions, LocalFunctions = Record<string, never>> = {
    [K in keyof RemoteFunctions]: BirpcFn<RemoteFunctions[K]>;
} & BirpcReturnBuiltin<RemoteFunctions, LocalFunctions>;
type PendingCallHandler = (options: Pick<PromiseEntry, 'method' | 'reject'>) => void | Promise<void>;
interface BirpcGroupReturnBuiltin<RemoteFunctions> {
    /**
     * Call the remote function and wait for the result.
     * An alternative to directly calling the function
     */
    $call: <K extends keyof RemoteFunctions>(method: K, ...args: ArgumentsType<RemoteFunctions[K]>) => Promise<Awaited<ReturnType<RemoteFunctions[K]>>>;
    /**
     * Same as `$call`, but returns `undefined` if the function is not defined on the remote side.
     */
    $callOptional: <K extends keyof RemoteFunctions>(method: K, ...args: ArgumentsType<RemoteFunctions[K]>) => Promise<Awaited<ReturnType<RemoteFunctions[K]> | undefined>>;
    /**
     * Send event without asking for response
     */
    $callEvent: <K extends keyof RemoteFunctions>(method: K, ...args: ArgumentsType<RemoteFunctions[K]>) => Promise<void>;
}
type BirpcGroupReturn<RemoteFunctions> = {
    [K in keyof RemoteFunctions]: BirpcGroupFn<RemoteFunctions[K]>;
} & BirpcGroupReturnBuiltin<RemoteFunctions>;
interface BirpcGroup<RemoteFunctions, LocalFunctions = Record<string, never>> {
    readonly clients: BirpcReturn<RemoteFunctions, LocalFunctions>[];
    readonly functions: LocalFunctions;
    readonly broadcast: BirpcGroupReturn<RemoteFunctions>;
    updateChannels: (fn?: ((channels: ChannelOptions[]) => void)) => BirpcReturn<RemoteFunctions, LocalFunctions>[];
}
interface PromiseEntry {
    resolve: (arg: any) => void;
    reject: (error: any) => void;
    method: string;
    timeoutId?: ReturnType<typeof setTimeout>;
}
declare const TYPE_REQUEST: "q";
interface Request {
    /**
     * Type
     */
    t: typeof TYPE_REQUEST;
    /**
     * ID
     */
    i?: string;
    /**
     * Method
     */
    m: string;
    /**
     * Arguments
     */
    a: any[];
    /**
     * Optional
     */
    o?: boolean;
}
declare const DEFAULT_TIMEOUT = 60000;
declare const setTimeout: typeof globalThis.setTimeout;
declare function createBirpc<RemoteFunctions = Record<string, never>, LocalFunctions extends object = Record<string, never>>($functions: LocalFunctions, options: BirpcOptions<RemoteFunctions, LocalFunctions>): BirpcReturn<RemoteFunctions, LocalFunctions>;
declare function cachedMap<T, R>(items: T[], fn: ((i: T) => R)): R[];
declare function createBirpcGroup<RemoteFunctions = Record<string, never>, LocalFunctions extends object = Record<string, never>>(functions: LocalFunctions, channels: ChannelOptions[] | (() => ChannelOptions[]), options?: EventOptions<RemoteFunctions, LocalFunctions>): BirpcGroup<RemoteFunctions, LocalFunctions>;

export { DEFAULT_TIMEOUT, cachedMap, createBirpc, createBirpcGroup };
export type { ArgumentsType, BirpcFn, BirpcGroup, BirpcGroupFn, BirpcGroupReturn, BirpcGroupReturnBuiltin, BirpcOptions, BirpcResolver, BirpcReturn, BirpcReturnBuiltin, ChannelOptions, EventOptions, PromisifyFn, ReturnType, Thenable };
