/**
 * Mandate signing and verification, backed by Node's built-in Ed25519 (no
 * external crypto dependency). Keys are raw 32-byte values, wire-compatible with
 * the Python port: same canonical bytes, same RFC-8032 signatures, same base64
 * envelope.
 */
export interface SignedMandate {
    mandate: Record<string, unknown>;
    signature: {
        alg: "Ed25519";
        public_key: string;
        value: string;
    };
}
export declare function generateKeypair(): {
    privateKey: Buffer;
    publicKey: Buffer;
};
export declare function publicKeyFromSeed(seed: Buffer): Buffer;
export declare function signMandate(mandate: Record<string, unknown>, seed: Buffer): SignedMandate;
export declare function verifySignature(signed: SignedMandate): boolean;
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