import { ChangeSetHandlerDefinition } from '../types/innerFunction';
import { ChangeSetDescriptor } from '../types/customFunction';
export type DefineChangeSetHandlerInput = {
    match: {
        name: string;
    };
    handle?: ChangeSetHandlerDefinition['handle'];
    handleChanges?: ChangeSetHandlerDefinition['handleChanges'];
    handleAfter?: ChangeSetHandlerDefinition['handleAfter'];
};
/**
 * Build a MEXWEX V2 changeset handler for `CustomFunctionParams.changeSetHandlers`.
 *
 * Validates the shape eagerly so a mis-declared handler fails at bundle import
 * time rather than at the first lambda invocation. Handlers match by
 * `match.name`, not entity type — two named handlers can target the same
 * GraphQL type with different logic.
 *
 * Exactly one of `handle` / `handleChanges` must be declared:
 *   - `handle` runs once per change, before the backend's default mutation,
 *     and reports whether it applied that change.
 *   - `handleChanges` runs ONCE with the whole batch of changes routed to this
 *     handler name, so the author can issue a single mutation and get one DB
 *     transaction, and reports the outcome for every change in the batch.
 * `handleAfter` (optional, either way) runs after the backend resolved temp
 * uids and applied any default mutation.
 */
export declare const defineChangeSetHandler: (def: DefineChangeSetHandlerInput) => ChangeSetHandlerDefinition;
/**
 * Validate a collection of changeset handler definitions (uniqueness of
 * `match.name`). Called by the dispatcher at lambda boot; also re-usable from a
 * build-time validator in the form bundle pipeline.
 */
export declare const validateChangeSetHandlerDefinitions: (handlers: ChangeSetHandlerDefinition[]) => void;
/**
 * Extract the ChangeSetDescriptor list (name) from a `params.changeSetHandlers`
 * array, mirrored to `CustomFunctionFeatures.changeSets` so the backend can list
 * handler names without unpacking the lambda.
 */
export declare const toChangeSetDescriptors: (handlers: ChangeSetHandlerDefinition[]) => ChangeSetDescriptor[];
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