import type { IActivityHandler } from "../../IActivityHandler";
/** Defines inputs for the GetBase64StringFromFile activity. */
export interface GetBase64StringFromFileInputs {
    file: File;
}
/** Defines outputs from the GetBase64StringFromFile activity. */
export interface GetBase64StringFromFileOutputs {
    /** @description The content of the file represented as a base-64 encoded string. */
    result: string;
}
export declare class GetBase64StringFromFile implements IActivityHandler {
    static readonly action = "gcx:wf:core::GetBase64StringFromFile";
    static readonly suite = "gcx:wf:builtin";
    execute(inputs: GetBase64StringFromFileInputs): Promise<GetBase64StringFromFileOutputs>;
    private getBase64;
}