/**
* The magic bytes that mark the start of a ZIP file inside an SU3 container.
*/
declare const ZIP_MAGIC: Buffer;
interface Su3Header {
	sigType: number;
	sigLength: number;
	versionLength: number;
	signerIdLength: number;
	contentLength: number;
	fileType: number;
	contentType: number;
	version: string;
	signerId: string;
}
/**
* Parse the SU3 header from a raw buffer.
* Returns null if the buffer doesn't start with the I2Psu3 magic.
*/
declare function parseSu3Header(buf: Buffer): Su3Header | null;
/**
* Maps a signer ID like "sahil@mail.i2p" to cert filename "sahil_at_mail.i2p.crt"
*/
declare function signerIdToCertFile(signerId: string): string;
/**
* Verify the cryptographic signature of an SU3 file against a PEM certificate.
* Returns true if valid, false otherwise.
*/
declare function verifySu3Signature(su3Buffer: Buffer, certPem: string): boolean;
/**
* Strips the SU3 header from a raw buffer and returns just the ZIP payload.
* Returns `null` if no ZIP header is found.
*/
declare function extractZipFromSu3(su3Buffer: Buffer): Buffer | null;
interface ExtractResult {
	/** Total number of `.dat` entries written */
	count: number;
	/** Base-names of the files that were written */
	files: string[];
}
/**
* Extract all `routerInfo-*.dat` entries from every `.su3` file found in
* `seedsDir` into `targetDir`. When `crtDir` and `servers` are provided,
* verifies each SU3 against the cert mapped in reseed.json.
* Returns the count and list of files written.
*/
declare function extractNetDb(seedsDir: string, targetDir: string, crtDir?: string, servers?: ReseedServer[]): Promise<ExtractResult>;
interface ReseedServer {
	url: string;
	crt_file: string;
}
/**
* Download fresh `.su3` files from reseed servers into `outputDir`.
* Uses the built-in reseed.json list or a user-supplied one.
*/
declare function refreshSeeds(servers: ReseedServer[], outputDir: string, timeoutMs?: number): Promise<string[]>;
export { verifySu3Signature, signerIdToCertFile, refreshSeeds, parseSu3Header, extractZipFromSu3, extractNetDb, ZIP_MAGIC, Su3Header, ReseedServer, ExtractResult };