export interface CanonicalUsage {
    readonly inputTokens: number;
    readonly outputTokens: number;
    readonly cacheReadTokens: number;
    readonly cacheWriteTokens: number;
    readonly reasoningTokens: number;
    readonly requestCount: number;
    readonly rawUsage?: unknown;
}
export type CostStatus = 'actual' | 'estimated' | 'included' | 'unknown';
export type CostSource = 'official_docs_snapshot' | 'openrouter_api' | 'endpoint_models_api' | 'none';
export interface PricingEntry {
    readonly inputCostPerMillion: number;
    readonly outputCostPerMillion: number;
    readonly cacheReadCostPerMillion: number;
    readonly cacheWriteCostPerMillion: number;
    readonly requestCost: number;
    readonly source: CostSource;
}
export interface CostResult {
    readonly amountUsd: number;
    readonly status: CostStatus;
    readonly source: CostSource;
    readonly label: string;
    readonly notes?: string;
}
export interface BillingRoute {
    readonly provider: string;
    readonly model: string;
    readonly billingMode: 'token' | 'request' | 'free';
}
declare const OFFICIAL_DOCS_PRICING: Record<string, PricingEntry>;
export declare function normalizeUsage(rawUsage: unknown, provider?: string): CanonicalUsage;
export declare function resolveBillingRoute(modelName: string, provider?: string): BillingRoute;
export declare function getPricingEntry(modelName: string, provider?: string): PricingEntry | null;
export declare function calculateCost(modelName: string, usage: CanonicalUsage, provider?: string): CostResult;
export declare function formatCostLabel(amountUsd: number): string;
export declare function formatDurationCompact(seconds: number): string;
export declare function formatTokenCountCompact(value: number): string;
export declare function accumulateUsage(base: CanonicalUsage, additional: CanonicalUsage): CanonicalUsage;
export declare const ZERO_USAGE: CanonicalUsage;
export { OFFICIAL_DOCS_PRICING };
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