/**
 * @name ui/runtime-logo-resolver
 * @description Runtime favicon fetcher with in-memory + filesystem cache.
 *
 * Instead of shipping static logo files in the repo, this resolver fetches
 * favicons from each protocol's website at runtime, caches them to disk,
 * and serves them from the SAP MCP server's /logos/{protocol-id} endpoint.
 *
 * Resolution order:
 *   1. In-memory cache (fastest, already fetched this session)
 *   2. Filesystem cache (~/.local/share/mcp-sap/logos/{protocol-id}.{ext})
 *   3. Inline SVG fallback (initials + brand color, always available)
 *
 * @module ui/runtime-logo-resolver
 */
export interface ProtocolFaviconEntry {
    readonly id: string;
    readonly name: string;
    readonly website: string;
    readonly initials: string;
    readonly color: string;
    readonly inlineSvg?: string;
}
export interface ResolvedLogo {
    readonly buffer: Buffer;
    readonly mimeType: string;
    readonly source: 'memory' | 'cache' | 'fetched' | 'fallback';
}
export declare function registerFaviconEntry(entry: ProtocolFaviconEntry): void;
/**
 * Resolve a protocol logo as a Buffer + MIME type.
 * Fetches the favicon from the protocol's website on first access,
 * then caches it to memory + disk for subsequent requests.
 *
 * @param protocolId - e.g. 'jupiter', 'adrena', 'metaplex'
 * @returns ResolvedLogo with buffer, mimeType, and source
 */
export declare function resolveFavicon(protocolId: string): Promise<ResolvedLogo>;
/**
 * Get the inline SVG for a protocol logo (for use in HTML cards without
 * a network request). Uses inlineSvg if available, otherwise generates
 * a fallback with initials + brand color.
 */
export declare function resolveLogoInline(protocolId: string): string;
/**
 * List all registered protocol IDs.
 */
export declare function listProtocols(): string[];
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