import type { S3Client } from "@aws-sdk/client-s3";
import type { Adapter } from "../index.js";
export interface IbmCosAdapterOptions {
    /** IBM COS bucket name. The adapter scopes all operations to it. */
    bucket: string;
    /**
     * IBM Cloud Object Storage region code, e.g. `"us-south"`, `"us-east"`,
     * `"eu-de"`, `"eu-gb"`, `"eu-es"`, `"jp-tok"`, `"jp-osa"`, `"au-syd"`,
     * `"br-sao"`, `"ca-tor"`. Drives the endpoint host
     * (`https://s3.<region>.cloud-object-storage.appdomain.cloud`); there's
     * no env-var fallback. Doubles as the SigV4 region.
     */
    region: string;
    /**
     * Override the IBM COS endpoint. When unset, defaults to the public
     * `https://s3.${region}.cloud-object-storage.appdomain.cloud`. For
     * direct (no-egress) access from inside the same IBM Cloud region, pass
     * `https://s3.direct.${region}.cloud-object-storage.appdomain.cloud`
     * (or the equivalent `private` host). IBM COS routes by Host header.
     */
    endpoint?: string;
    /**
     * HMAC access key ID. Generate HMAC credentials when creating the IBM COS
     * service credential (Advanced options → "Include HMAC Credential") —
     * separate from IBM Cloud IAM API keys. Falls back to
     * `IBM_COS_ACCESS_KEY_ID`; required if that env var isn't set.
     */
    accessKeyId?: string;
    /**
     * HMAC secret access key. Falls back to `IBM_COS_SECRET_ACCESS_KEY`;
     * required if that env var isn't set.
     */
    secretAccessKey?: string;
    /**
     * Use path-style addressing (`/<bucket>/<key>`) rather than virtual-hosted
     * style. Defaults to `false` — virtual-hosted is canonical for IBM COS.
     */
    forcePathStyle?: boolean;
    /**
     * Origin used to build URLs from `url()`. When set, `url(key)` returns
     * `${publicBaseUrl}/${key}` and skips signing. For buckets with a public
     * access policy the natural value is
     * `https://${bucket}.s3.${region}.cloud-object-storage.appdomain.cloud`;
     * a custom CNAME fronting the bucket also works. When unset, `url()`
     * falls back to a presigned GetObject (default expiry: 1 hour).
     */
    publicBaseUrl?: string;
    /**
     * Default expiry, in seconds, for the presigned URLs returned by `url()`
     * when `publicBaseUrl` is not set. Defaults to 3600 (1 hour).
     */
    defaultUrlExpiresIn?: number;
}
export type IbmCosAdapter = Adapter<S3Client>;
export declare const ibmCos: (opts: IbmCosAdapterOptions) => IbmCosAdapter;
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