/**
 * Resolves a chain shortname to its chain ID.
 *
 * Fetches the shortname to chain ID mapping from chainid.network API.
 * Falls back to a default map if the API call fails.
 *
 * @param shortName - The chain shortname (e.g., "eth", "base", "polygon")
 * @returns The chain ID if found, undefined otherwise
 * @example
 * ```ts
 * const chainId = await shortnameToChainId("eth");
 * // Returns: 1
 * ```
 */
export declare const shortnameToChainId: (shortName: string) => Promise<number | undefined>;
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