/**
 * ICE restart support (RFC 9725 §4.4, RFC 8840).
 *
 * When a client's local address changes — Wi-Fi to cellular, a VPN toggle, a
 * laptop moving networks — the gathered candidates are dead and the connection
 * cannot heal on its own. Re-POSTing an offer would allocate a new session on
 * the server, losing the conversation history and replaying the greeting. An
 * ICE restart instead swaps only the ICE generation on the *existing* session,
 * so nothing above the transport notices.
 *
 * The wire format is an SDP fragment rather than a full description, so these
 * helpers translate in both directions: our new local offer becomes a fragment
 * to PATCH, and the server's reply fragment is folded back into the answer we
 * already have.
 */
/** Media type of an ICE restart body. */
export declare const ICE_FRAGMENT_CONTENT_TYPE = "application/trickle-ice-sdpfrag";
/** Splits an SDP or fragment into lines, tolerating LF-only bodies. */
export declare function splitSdpLines(sdp: string): string[];
export interface IceDetails {
    ufrag: string;
    pwd: string;
    candidates: string[];
}
/**
 * Reads the ICE credentials and candidates out of an SDP or fragment.
 * Credentials may sit at session or media level; the first of each wins, which
 * is what a bundled description means anyway.
 */
export declare function parseIceDetails(sdp: string): IceDetails;
/**
 * Renders our new local offer as the sdpfrag to PATCH: the credentials, then
 * the bundle-master m-line with its mid and candidates. Shaped after the
 * request example in RFC 9725 §4.4.2.
 */
export declare function iceFragmentFromSdp(localSdp: string): string;
/**
 * Folds the server's reply fragment into the answer we already hold, producing
 * a full SDP that `setRemoteDescription` will accept.
 *
 * Only the ICE generation changes: credentials are replaced wherever they
 * appear, stale candidates are dropped, and the new ones are inserted into the
 * first media section. Everything else — m-lines, payload types, the DTLS
 * fingerprint, SSRCs — is carried over verbatim, because the restart is not
 * meant to renegotiate any of it.
 *
 * Throws if the fragment carries no credentials, which would mean it is not a
 * restart reply at all.
 */
export declare function applyIceFragment(remoteSdp: string, fragment: string): string;
/** Increments the session version in an `o=` line, marking a new revision. */
export declare function bumpSdpOrigin(line: string): string;
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