import type { ProviderQuotaFetch } from "../types.js";
export declare const EUTILS_BASE_URL = "https://eutils.ncbi.nlm.nih.gov/entrez/eutils/";
/** Injectable transport dependencies (fetch, timers). */
export interface PubmedTransportDeps {
    readonly fetch?: ProviderQuotaFetch;
    readonly setTimeout?: typeof setTimeout;
    readonly clearTimeout?: typeof clearTimeout;
}
/** Credential resolved per invocation from the injected env. */
export interface PubmedCredentials {
    /** `NCBI_API_KEY` when present; keyless (3 r/s) otherwise. */
    readonly apiKey?: string;
}
export declare function resolvePubmedCredentials(env: NodeJS.ProcessEnv): PubmedCredentials;
/** `PUBMED_TIMEOUT` override, clamped through the shared seam (#234). */
export declare function resolveTimeoutMs(env: NodeJS.ProcessEnv): number;
/**
 * esearch step: the id-list lookup. Returns the parsed JSON envelope
 * (`esearchresult.idlist`); the Adapter extracts the ids.
 */
export declare function fetchPubmedEsearch(params: Record<string, string>, deps?: PubmedTransportDeps & {
    readonly env?: NodeJS.ProcessEnv;
}, signal?: AbortSignal): Promise<unknown>;
/**
 * efetch step: the record fetch (PubmedArticleSet XML). Returns the raw
 * XML string; the Adapter's hand parser owns field extraction.
 */
export declare function fetchPubmedEfetch(params: Record<string, string>, deps?: PubmedTransportDeps & {
    readonly env?: NodeJS.ProcessEnv;
}, signal?: AbortSignal): Promise<string>;
//# sourceMappingURL=client.d.ts.map