import type { GeoNetworkConfig } from '../types.js';
export type FetchLike = typeof fetch;
export type GeoClientContext = {
    network: GeoNetworkConfig;
    fetch?: FetchLike;
};
/**
 * Returns the fetch implementation for an operation that requires network access.
 *
 * Sync calldata helpers should not call this. Async helpers that upload files,
 * publish edits, or fetch graph context use it so missing fetch errors are
 * raised only when network access is actually required.
 *
 * @param context Client context passed to the helper.
 * @param operation Human-readable operation name used in the thrown error.
 * @returns The configured fetch implementation.
 * @throws When neither `context.fetch` nor `globalThis.fetch` is available.
 */
export declare function requireFetch(context: GeoClientContext, operation: string): FetchLike;
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