import type { TrustBoundaryFact } from './types.js';
export type Projection = {
    readonly status: 'ignored';
} | {
    readonly status: 'invalid';
} | {
    readonly status: 'oversized';
} | {
    readonly status: 'fact';
    readonly fact: TrustBoundaryFact;
};
/** Single own-data whitelist admission boundary. Never copies/enumerates the source. */
export declare function projectTrustBoundary(event: unknown, reserve: () => number | undefined): Projection;