import { AWSOptions as _AWSOptions, FetchHeaders, FetchOptions } from './types.js';
export type AWSOptions = _AWSOptions;
type FetchOptionsWithHeaders = {
    headers: FetchHeaders;
} & Omit<FetchOptions, 'headers'>;
/**
 * @private
 * Create canonical headers
 *
<pre>
CanonicalHeaders =
    CanonicalHeadersEntry0 + CanonicalHeadersEntry1 + ... + CanonicalHeadersEntryN
CanonicalHeadersEntry =
    Lowercase(HeaderName) + ':' + Trimall(HeaderValue) + '\n'
</pre>
 */
declare const getCanonicalHeaders: (headers: FetchHeaders) => string;
/**
 * @private
 * The list of headers that were included in the canonical headers
 * For HTTP/1.1 requests, the host header must be included as a signed header.
 * For HTTP/2 requests that include the :authority header instead of the host header,
 * you must include the :authority header as a signed header. If you include a date or
 * x-amz-date header, you must also include that header in the list of signed headers.
 */
declare const getSignedHeaders: (headers: FetchHeaders) => string;
/**
 * @private
 * Create a canonical request
 * Refer to {@link http://docs.aws.amazon.com/general/latest/gr/sigv4-create-canonical-request.html|Create a Canonical Request}
 *
<pre>
CanonicalRequest =
    HTTPRequestMethod + '\n' +
    CanonicalURI + '\n' +
    CanonicalQueryString + '\n' +
    CanonicalHeaders + '\n' +
    SignedHeaders + '\n' +
    HexEncode(Hash(RequestPayload))
</pre>
 */
declare const getCanonicalString: (resource: string, fetchOptions: FetchOptionsWithHeaders) => Promise<string>;
declare const getRegionFromResource: (resource: string) => string;
declare const getCredentialScope: ({ dateString, region, service, }: {
    dateString: string;
    region: string;
    service: string;
}) => string;
/**
 * @private
 * Create a string to sign
 * Refer to {@link http://docs.aws.amazon.com/general/latest/gr/sigv4-create-string-to-sign.html|Create String to Sign}
 */
declare const getStringToSign: ({ algorithm, canonicalString, dateTimeString, scope, }: {
    algorithm: string;
    canonicalString: string;
    dateTimeString: string;
    scope: string;
}) => Promise<string>;
/**
 * @private
 * Create signing key
 * Refer to {@link http://docs.aws.amazon.com/general/latest/gr/sigv4-calculate-signature.html|Calculate Signature}
 */
declare const getSigningKey: ({ dateString, region, secretAccessKey, service, }: {
    dateString: string;
    region: string;
    secretAccessKey: string;
    service: string;
}) => Promise<string | Uint8Array<ArrayBuffer>>;
declare const getSignature: (signingKey: string | Uint8Array, stringToSign: string) => Promise<string>;
/**
 * @private
 * Create authorization headers to include in the HTTP request
 * Refer to {@link http://docs.aws.amazon.com/general/latest/gr/sigv4-add-signature-to-request.html|Add signature to request}
 */
declare const getAuthorizationHeader: ({ accessKeyId, algorithm, scope, signature, signedHeaders, }: {
    accessKeyId: string;
    algorithm: string;
    scope: string;
    signature: string;
    signedHeaders: string;
}) => string;
declare const getHeadersWithAuthorization: (resource: string, fetchOptions: FetchOptions, { accessKeyId, region, secretAccessKey, service, sessionToken, }: AWSOptions) => Promise<FetchHeaders>;
export { getAuthorizationHeader, getCanonicalHeaders, getCanonicalString, getCredentialScope, getHeadersWithAuthorization, getRegionFromResource, getSignature, getSignedHeaders, getSigningKey, getStringToSign, };