import type { SippClientOptions } from './browser-client.js';
export interface RuntimeUrls {
    moduleUrl: string;
    wasmUrl: string;
    threading: WasmThreadingMode;
}
export type WasmThreadingPreference = 'single-thread' | 'pthread';
export type WasmThreadingMode = 'single-thread' | 'pthread';
export type RuntimeBackendOverride = 'cpu';
interface RuntimeUrlResolutionOptions {
    readonly bundledRuntimeUrls?: () => RuntimeUrls;
}
export declare function resolveOptimizedPackageAssetUrl(packageRelativePath: string, importerUrl: string): string | null;
export declare function getDefaultRuntimeUrls(importerUrl?: string): RuntimeUrls;
export declare function supportsWasmPthreads(): boolean;
export declare function resolveRuntimeThreadingMode(config: Pick<SippClientOptions, 'moduleUrl' | 'wasmUrl' | 'wasmThreading'>): WasmThreadingMode;
export declare function resolveRuntimeBackendOverride(config: Pick<SippClientOptions, 'moduleUrl' | 'wasmUrl' | 'pthreadModuleUrl' | 'pthreadWasmUrl' | 'wasmThreading'>): RuntimeBackendOverride | null;
export declare function resolveRuntimeUrls(config: Pick<SippClientOptions, 'moduleUrl' | 'wasmUrl' | 'pthreadModuleUrl' | 'pthreadWasmUrl' | 'trustedOrigins' | 'wasmThreading'>, options?: RuntimeUrlResolutionOptions): RuntimeUrls;
export {};