import type { IVaultMetadata } from '../types';
/**
 * Fetch vault metadata from the upshift API.
 * Returns metadata including symbol, subgraph URL, and address for all vaults.
 * @param options Request options including headers
 * @returns Vault metadata object keyed by lowercase symbol
 */
export declare function fetchVaultMetadata(opts?: {
    options?: {
        headers?: Record<string, string>;
    };
}): Promise<IVaultMetadata>;