import type { PampEnvelopeHeader, PampIdentity, PampMessage, PampSession } from './types.js';
/**
 * Build a full Base64-encoded PAMP envelope.
 *
 * 1. Encrypts the body using session keys
 * 2. Signs header + ciphertext with identity RSA key
 * 3. Assembles header JSON + delimiter + encrypted body
 * 4. Base64-encodes the whole thing
 */
export declare function buildEnvelope(body: string, header: Omit<PampEnvelopeHeader, 'signature'>, session: PampSession, identity: PampIdentity): string;
/**
 * Parse a Base64 envelope into header + encrypted body.
 * Does NOT decrypt or verify — call decryptEnvelope() for that.
 */
export declare function parseEnvelope(base64Envelope: string): {
    header: PampEnvelopeHeader;
    encryptedBody: string;
};
/**
 * Verify signature and decrypt the body of a parsed envelope.
 */
export declare function decryptEnvelope(header: PampEnvelopeHeader, encryptedBody: string, session: PampSession, senderIdentityPublicKey: string): PampMessage;
//# sourceMappingURL=envelope.d.ts.map