import { ALPHANUMERIC, ALPHANUMERIC_LOWER, ALPHANUMERIC_UPPER, BASE64, BASE64URL, DIGITS, HEX_LOWER } from "./alphabets.ts";
import type { TokenPattern } from "./types.ts";
export { BUILTIN_PATTERNS, MIN_SEGMENT_LENGTH } from "./registry.ts";
export { scan } from "./scanner.ts";
export type { Alphabet, TokenPattern, TokenSpan, } from "./types.ts";
export { ALPHANUMERIC, ALPHANUMERIC_LOWER, ALPHANUMERIC_UPPER, BASE64, BASE64URL, DIGITS, HEX_LOWER, };
export interface TokenEncryptorOptions {
    types?: string[];
    tweak?: Uint8Array;
}
export interface EncryptedSpan {
    /** Start position of the token in the original text. */
    start: number;
    /** End position of the token in the original text. */
    end: number;
    /** The full original token (prefix + body). */
    original: string;
    /** The full encrypted token (prefix + encrypted body, or marker + body for heuristic). */
    encrypted: string;
    /** Name of the pattern that matched (e.g., "github-pat", "sendgrid"). */
    patternName: string;
}
export interface EncryptResult {
    /** The full encrypted text. */
    text: string;
    /** One entry per token that was encrypted. */
    spans: EncryptedSpan[];
}
export declare class TokenEncryptor {
    private readonly key;
    private readonly cache;
    private readonly patterns;
    private destroyed;
    constructor(key: Uint8Array);
    private assertAlive;
    private getCipher;
    private makeTweak;
    private activePatterns;
    encrypt(text: string, options?: TokenEncryptorOptions): string;
    encryptWithSpans(text: string, options?: TokenEncryptorOptions): EncryptResult;
    decrypt(text: string, options?: TokenEncryptorOptions): string;
    private encryptSpan;
    private decryptSpan;
    private findHeuristicMarkerHits;
    register(pattern: TokenPattern): void;
    destroy(): void;
}