export type Duration = number;
export type RpcMethod<Req, Res> = ((request: Req) => Promise<Res>) & {
    safe(request: Req): Promise<[{
        error: unknown;
    }, null] | [null, Res]>;
};
export type RpcMethodV3<Req, Res, Err> = ((request: Req) => Promise<Res>) & {
    safe(request: Req): Promise<[Err, null] | [null, Res]>;
    parseError(e: unknown): Err;
};