import { CreationOptional, InferAttributes, InferCreationAttributes, Model } from 'sequelize';
import type { LiteralUnion } from 'type-fest';
export declare const nextExchangeRateProviderId: (size?: number) => string;
export declare class ExchangeRateProvider extends Model<InferAttributes<ExchangeRateProvider>, InferCreationAttributes<ExchangeRateProvider>> {
    id: CreationOptional<string>;
    name: string;
    type: CreationOptional<LiteralUnion<'token-data' | 'coingecko' | 'coinmarketcap', string>>;
    enabled: CreationOptional<boolean>;
    priority: CreationOptional<number>;
    status: CreationOptional<LiteralUnion<'active' | 'degraded' | 'paused' | 'inactive', string>>;
    paused_reason: string | null;
    config: Record<string, any> | null;
    last_success_at: Date | null;
    last_failure_at: Date | null;
    failure_count: CreationOptional<number>;
    created_at: CreationOptional<Date>;
    updated_at: CreationOptional<Date>;
    static initialize(sequelize: any): void;
    static getActiveProviders(): Promise<ExchangeRateProvider[]>;
    recordSuccess(): Promise<void>;
    recordFailure(reason?: string): Promise<void>;
    /**
     * Encrypt sensitive config data (API keys)
     * Should be called before saving to database
     */
    static encryptConfig(config: Record<string, any> | null): Record<string, any> | null;
    /**
     * Decrypt sensitive config data (API keys)
     * Should be called after reading from database
     */
    static decryptConfig(config: Record<string, any> | null): Record<string, any> | null;
    /**
     * Mask sensitive config data for display
     * Returns config with API key partially masked
     */
    static maskConfig(config: Record<string, any> | null): Record<string, any> | null;
}
export type TExchangeRateProvider = InferAttributes<ExchangeRateProvider>;