import type { WorkflowOperationSurface, WorkflowSurface } from 'openxiangda-contracts/browser';
export interface WorkflowOperationStringSchema {
    minLength?: number;
    maxLength?: number;
    pattern?: string;
}
export declare function workflowOperationStringError(schema: WorkflowOperationStringSchema, value: unknown, required: boolean, label: string): string | null;
export declare function workflowOperationSignature(operation: WorkflowOperationSurface): string;
export declare function retainedWorkflowOperation(selected: {
    operation: WorkflowOperationSurface;
    operationSignature: string;
    surface: WorkflowSurface;
} | null, current: WorkflowSurface, operations: WorkflowOperationSurface[], afterRefusal: boolean): WorkflowOperationSurface | null;
export declare function workflowOperationInputFailure(error: unknown): string | null;
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