import { fromTemporaryCredentials } from '@aws-sdk/credential-providers';
import { RedshiftCredentialsProvider } from './RedshiftCredentialsProvider';
export interface RedshiftIAMCredentialProviderOptions {
    region?: string;
    assumeRoleArn?: string;
    assumeRoleExternalId?: string;
    clusterIdentifier: string;
    dbName?: string;
}
interface CachedCredentials {
    user: string;
    password: string;
    expiration: Date;
}
export declare class RedshiftIAMCredentialsProvider implements RedshiftCredentialsProvider {
    protected readonly region: string;
    protected readonly clusterIdentifier: string;
    protected readonly dbName: string;
    protected readonly awsCredentials?: ReturnType<typeof fromTemporaryCredentials>;
    protected cached: CachedCredentials | null;
    protected inflightRefresh: Promise<CachedCredentials> | null;
    constructor(options: RedshiftIAMCredentialProviderOptions);
    getDbName(): string;
    getCredentials(): Promise<{
        user: string;
        password: string;
    }>;
    protected isExpired(): boolean;
    protected resolveCredentials(): Promise<CachedCredentials>;
    protected refreshCredentials(): Promise<CachedCredentials>;
}
export {};
//# sourceMappingURL=RedshiftIAMCredentialsProvider.d.ts.map