/**
 * Public, non-wallet cryptographic primitives used by the read-only web UI.
 *
 * This module deliberately has no dependency on the HD wallet runtime: it can
 * verify public signatures, hash bytes, and decrypt an already-authorized
 * symmetric payload without exposing signing or key-derivation capabilities.
 */
export declare function publicSha256(data: Uint8Array): Uint8Array;
export declare function verifyPublicEd25519Signature(publicKey: Uint8Array, message: Uint8Array, signature: Uint8Array): boolean;
export declare function decryptPublicAesGcm(key: Uint8Array, ciphertextAndTag: Uint8Array, iv: Uint8Array, aad?: Uint8Array<ArrayBuffer>): Promise<Uint8Array>;
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