import type { TextFontFaceRequest } from './richText.js';
export type TextFontFaceResult = {
    readonly status: 'ready';
    readonly faceId: string;
    readonly family: string;
    readonly weight: number;
    readonly style: 'normal' | 'italic';
    readonly sample: string;
} | {
    readonly status: 'unavailable';
    readonly code: string;
    readonly message: string;
} | {
    readonly status: 'failed';
    readonly code: string;
    readonly message: string;
};
/** The provider explicitly attests to the exact face and sample coverage in this environment. */
export interface TextFontFaceResolver {
    readonly environmentId: string;
    resolve(request: TextFontFaceRequest, context: {
        readonly signal: AbortSignal;
    }): Promise<TextFontFaceResult>;
}
export interface PreparedTextFont {
    readonly request: TextFontFaceRequest;
    readonly result: TextFontFaceResult;
}
export interface TextFontPreparationReport {
    readonly environmentId: string;
    readonly status: 'ready' | 'unavailable' | 'failed';
    readonly fonts: readonly PreparedTextFont[];
}
export declare function textFontRequestKey(request: TextFontFaceRequest): string;
/** Invalid provider attestations fail closed; a fallback or a different sample is not a ready face. */
export declare function validateTextFontFaceResult(request: TextFontFaceRequest, result: TextFontFaceResult): TextFontFaceResult;