import type { DataFileRef, WorkflowTaskFileUpload, WorkflowTaskFileUploadPlan } from 'openxiangda-contracts/browser';
/** Transient bytes and the original intent. Never persist this object or its upload plan. */
export interface WorkflowTaskFileUploadIntent {
    taskId: string;
    input: WorkflowTaskFileUpload;
    file: File;
    phase: 'initiate' | 'upload' | 'complete';
}
export interface WorkflowTaskFileUploadTransport {
    initiate: (taskId: string, input: WorkflowTaskFileUpload) => Promise<WorkflowTaskFileUploadPlan>;
    read: (taskId: string, fileId: string) => Promise<WorkflowTaskFileUploadPlan>;
    put: (plan: WorkflowTaskFileUploadPlan, file: File) => Promise<void>;
    complete: (taskId: string, fileId: string) => Promise<DataFileRef>;
}
export declare function assertWorkflowTaskFileUploadPlan(intent: WorkflowTaskFileUploadIntent, plan: WorkflowTaskFileUploadPlan): void;
/** A ready receipt is final. A lost completion response never causes another PUT. */
export declare function runWorkflowTaskFileUpload(intent: WorkflowTaskFileUploadIntent, transport: WorkflowTaskFileUploadTransport, recovery?: boolean): Promise<DataFileRef>;
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