export declare function getImportMetaEnv(): Record<string, string | undefined> | undefined;
export declare function resolveEnvValue(keys: string[]): string | undefined;
export declare function resolveClientIdFromEnv(): string | undefined;
export declare function resolveClientId(provided?: string, envResolver?: () => string | undefined): string | undefined;
export declare function buildIframeSrc(baseUrl: string, clientId?: string, extraParams?: Record<string, string | number | undefined>): string;
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