/** Origin domain of losslessly preserved unknown CESR payloads. */
export type PrimitiveDomain = "txt" | "bny";
/**
 * Lossless placeholder for unrecognized CESR units encountered during parse.
 *
 * In compat fallback paths we preserve unknown payload bytes as instances of
 * this class so roundtrip serialization can remain byte-accurate.
 */
export declare class UnknownPrimitive {
    readonly code: string;
    readonly qb64: string;
    readonly qb2: Uint8Array;
    readonly fullSize: number;
    readonly fullSizeB2: number;
    readonly raw: Uint8Array;
    readonly sourceDomain: PrimitiveDomain;
    constructor(qb64: string, qb2: Uint8Array, sourceDomain: PrimitiveDomain);
    /**
     * Build an unknown primitive directly from parser payload bytes.
     *
     * When `domain="txt"` and content is not valid base64, `qb2` intentionally
     * keeps the original bytes to remain lossless.
     */
    static fromPayload(payload: Uint8Array, domain: PrimitiveDomain): UnknownPrimitive;
    /** Equality by canonical text form used throughout primitive graph comparisons. */
    equals(other: {
        qb64: string;
    }): boolean;
    /** String coercion returns canonical qb64 text token. */
    toString(): string;
}
//# sourceMappingURL=unknown.d.ts.map