/**
 * Map a numeric `chainId` to a stable lowercase slug for use as a Sentry tag
 * value. Resolves both EVM chains ({@link NETWORKS}) and synthetic non-EVM
 * chain IDs ({@link SPECIAL_CHAINS}); unknown IDs return `'unknown:<id>'`.
 *
 * @param chainId - Numeric chain ID, including negative IDs for non-EVM chains.
 * @returns Slugified chain label (e.g. `'ethereum'`, `'arbitrum-one'`, `'solana'`).
 */
export declare function chainIdToTagValue(chainId: number | undefined): string;