declare module 'sm-crypto' {
  export interface SM2KeyPair {
    privateKey: string;
    publicKey: string;
  }
  
  export const sm2: {
    generateKeyPairHex: (privateKey?: string) => SM2KeyPair;
    doEncrypt: (message: string, publicKey: string, cipherMode?: number) => string;
    doDecrypt: (ciphertext: string, privateKey: string, cipherMode?: number, options?: { output?: string }) => string | Uint8Array;
    doSignature: (message: string | Uint8Array, privateKey: string, options?: { hash?: boolean, der?: boolean, userId?: string, publicKey?: string, pointPool?: any[] }) => string;
    doVerifySignature: (message: string | Uint8Array, signature: string, publicKey: string, options?: { hash?: boolean, der?: boolean, userId?: string }) => boolean;
    getPublicKeyFromPrivateKey: (privateKey: string) => string;
  };
  
  export const sm3: {
    digest: (message: string) => string;
  };
  
  export const sm4: {
    encrypt: (message: string, key: string, options?: any) => string;
    decrypt: (ciphertext: string, key: string, options?: any) => string;
  };
}