import type { ArraySlice, OPRFRawMarker, RedactedOrHashedArraySlice, TOPRFProofParams } from '../types/index.ts';
export declare const REDACTION_CHAR = "*";
export declare const REDACTION_CHAR_CODE: number;
type SliceWithReveal<T> = {
    block: T;
    redactedPlaintext: Uint8Array;
    /**
     * If the block has some TOPRF claims -- they'll be set here
     */
    toprfs?: TOPRFProofParams[];
    /**
     * If the block has oprf-raw markers for server-side OPRF computation
     */
    oprfRawMarkers?: OPRFRawMarker[];
    /**
     * If text was replaced in the previous block w TOPRF but
     * it overshot into this block. The "length" specifies how much
     * of it got overshot into this block
     */
    overshotToprfFromPrevBlock?: {
        length: number;
    };
    /**
     * If an oprf-raw marker from the previous block overshot into this block.
     * The server will collect plaintext from this block to complete the OPRF.
     */
    overshotOprfRawFromPrevBlock?: {
        length: number;
    };
};
export type RevealedSlices<T> = 'all' | SliceWithReveal<T>[];
/**
 * Check if a redacted string is congruent with the original string.
 * @param redacted the redacted content, redacted content is replaced by '*'
 * @param original the original content
 */
export declare function isRedactionCongruent<T extends string | Uint8Array>(redacted: T, original: T): boolean;
/**
 * Is the string fully redacted?
 */
export declare function isFullyRedacted<T extends string | Uint8Array>(redacted: T): boolean;
/**
 * Given some plaintext blocks and a redaction function, return the blocks that
 * need to be revealed to the other party
 *
 * Use case: we get the response for a request in several blocks, and want to redact
 * pieces that go through multiple blocks. We can use this function to get the
 * blocks that need to be revealed to the other party
 *
 * @example if we received ["secret is 12","345","678. Thanks"]. We'd want
 * to redact the "12345678" and reveal the rest. We'd pass in the blocks and
 * the redact function will return the redactions, namely [10,19].
 * The function will return the blocks ["secret is **","***. Thanks"].
 * The middle block is fully redacted, so it's not returned
 *
 * @param blocks blocks to reveal
 * @param redact function that returns the redactions
 * @returns blocks to reveal
 */
export declare function getBlocksToReveal<T extends {
    plaintext: Uint8Array;
}>(blocks: T[], redact: (total: Uint8Array) => RedactedOrHashedArraySlice[], performOprf: (plaintext: Uint8Array) => Promise<TOPRFProofParams>): Promise<"all" | SliceWithReveal<T>[]>;
/**
 * Redact the following slices from the total
 */
export declare function redactSlices(total: Uint8Array, slices: ArraySlice[]): Uint8Array<ArrayBuffer>;
/**
 * Converts the binary hash to an ASCII string of the expected length.
 * If the hash is shorter than the expected length, it will be padded with
 * '0' characters. If it's longer, it will be truncated.
 */
export declare function binaryHashToStr(hash: Uint8Array, expLength: number): string;
export {};