/**
 * QuickBooks OAuth credentials structure
 */
export interface QBCredentials {
    client_id: string;
    client_secret: string;
    redirect_url: string;
    access_token: string;
    refresh_token: string;
    company_id?: string;
}
/**
 * Abstract credential provider interface
 * Implemented by AWS and Local providers
 */
export interface CredentialProvider {
    /**
     * Get current OAuth credentials
     */
    getCredentials(): Promise<QBCredentials>;
    /**
     * Save updated credentials (e.g., after token refresh)
     */
    saveCredentials(credentials: QBCredentials): Promise<void>;
    /**
     * Get the QuickBooks company/realm ID
     */
    getCompanyId(): Promise<string>;
    /**
     * Check if credentials are configured and available
     */
    isConfigured(): Promise<boolean>;
}
/**
 * Credential mode - determines which provider to use
 */
export type CredentialMode = "local" | "aws";
/**
 * Get credential mode from environment
 * Defaults to "local" if not specified
 */
export declare function getCredentialMode(): CredentialMode;
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