import { BankJobData } from '../job/bank-job-data';
/**
 * Step status can be:
 *   - completed
 *   - skipped
 *   - suspended
 *   - error
 */
export declare enum StepStatus {
    Completed = "completed",
    Skipped = "skipped",
    Suspended = "suspended",
    Error = "error"
}
/**
 * Step completed successfully.
 */
export type StepCompleted = {
    status: StepStatus.Completed;
    state?: any;
};
/**
 * Step is already executed, so it
 * skipped current execution.
 */
export type StepSkipped = {
    status: StepStatus.Skipped;
    state?: any;
};
/**
 * Step is currently suspended, which
 * will cause workflow to pause the
 * execution.
 */
export type StepSuspend = {
    status: StepStatus.Suspended;
    suspendedUntil?: Date;
    state?: any;
};
/**
 * Error occured while executing
 * the step, which will stop the
 * workflow execution.
 */
export type StepError = {
    status: StepStatus.Error;
    error: any;
    state?: any;
};
/**
 * Abstract step result.
 */
export type StepResult = StepCompleted | StepSkipped | StepSuspend | StepError;
/**
 * Interface for a workflow step.
 */
export declare abstract class IStep<TContext> {
    /**
     * Executes the step.
     *
     * @param job job to process
     * @param context step context
     * @returns step result
     */
    abstract execute(job: BankJobData, context: TContext): Promise<StepResult>;
}