import type { KeysToCamelCase } from '@silverhand/essentials';
import type { Requester } from '../types/index.js';
export type FetchTokenByAuthorizationCodeParameters = {
    clientId: string;
    tokenEndpoint: string;
    redirectUri: string;
    codeVerifier: string;
    code: string;
    resource?: string;
};
export type FetchTokenByRefreshTokenParameters = {
    /** The client ID of the application. */
    clientId: string;
    /** The token endpoint of the authorization server. */
    tokenEndpoint: string;
    /** The refresh token to be used to fetch the organization access token. */
    refreshToken: string;
    /** The API resource to be fetch the access token for. */
    resource?: string;
    /** The ID of the organization to be fetch the access token for. */
    organizationId?: string;
    /**
     * The scopes to request for the access token. If not provided, the authorization server
     * will use all the scopes that the client is authorized for.
     */
    scopes?: string[];
};
type SnakeCaseCodeTokenResponse = {
    access_token: string;
    refresh_token?: string;
    id_token: string;
    scope: string;
    expires_in: number;
};
export type CodeTokenResponse = KeysToCamelCase<SnakeCaseCodeTokenResponse>;
type SnakeCaseRefreshTokenTokenResponse = {
    access_token: string;
    refresh_token?: string;
    id_token?: string;
    scope: string;
    expires_in: number;
};
export type RefreshTokenTokenResponse = KeysToCamelCase<SnakeCaseRefreshTokenTokenResponse>;
export declare const fetchTokenByAuthorizationCode: ({ clientId, tokenEndpoint, redirectUri, codeVerifier, code, resource, }: FetchTokenByAuthorizationCodeParameters, requester: Requester) => Promise<CodeTokenResponse>;
/**
 * Fetch access token by refresh token using the token endpoint and `refresh_token` grant type.
 * @param params The parameters for fetching access token.
 * @param requester The requester for sending HTTP request.
 * @returns A Promise that resolves to the access token response.
 */
export declare const fetchTokenByRefreshToken: (params: FetchTokenByRefreshTokenParameters, requester: Requester) => Promise<RefreshTokenTokenResponse>;
export {};