import { AwsClient } from "aws4fetch";
import type { Adapter } from "../index.js";
export interface S3FetchAdapterOptions {
    /** Bucket name. All operations are scoped to it. */
    bucket: string;
    /**
     * Service endpoint origin, e.g. `https://ACCOUNT.r2.cloudflarestorage.com`
     * or `https://s3.us-east-1.amazonaws.com`.
     */
    endpoint: string;
    /** SigV4 signing region. Defaults to `us-east-1`; R2 uses `auto`. */
    region?: string;
    accessKeyId: string;
    secretAccessKey: string;
    sessionToken?: string;
    /**
     * Use path-style addressing (`https://endpoint/bucket/key`) instead of
     * virtual-hosted style (`https://bucket.endpoint/key`).
     */
    forcePathStyle?: boolean;
    /** See {@link import("../s3/index.js").S3AdapterOptions.publicBaseUrl}. */
    publicBaseUrl?: string;
    /** Default expiry, in seconds, for presigned `url()`s. Defaults to 3600. */
    defaultUrlExpiresIn?: number;
    /** Fallback message for unclassified provider errors, e.g. `"R2 error"`. */
    providerLabel?: string;
    /** Adapter `name` to report, e.g. `"r2-http-fetch"`. */
    name?: string;
    /**
     * Override the `fetch` implementation used for every request — for tests,
     * or runtimes that hand out a bound/instrumented fetch. Defaults to
     * `globalThis.fetch`.
     */
    fetch?: (request: Request) => Promise<Response>;
}
export type S3FetchAdapter = Adapter<AwsClient> & {
    readonly bucket: string;
};
export declare const s3FetchAdapter: (opts: S3FetchAdapterOptions) => S3FetchAdapter;
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