/** Minimal constraint: every provider must expose a stable string id. */
export interface Identifiable {
    readonly id: string;
}
/**
 * Generic, type-safe provider registry used by Swap, DCA, and Lending modules.
 *
 * Handles registration, default selection, lookup, and listing — the logic
 * that was previously duplicated across three separate implementations.
 */
export declare class ProviderRegistry<T extends Identifiable> {
    private readonly domain;
    private readonly providers;
    private defaultId;
    constructor(domain: string);
    /** Register a provider. Optionally make it the default. */
    register(provider: T, makeDefault?: boolean): void;
    /** Set the default provider by id. Throws if the id is not registered. */
    setDefault(id: string): void;
    /** Look up a provider by id. Throws if not found. */
    get(id: string): T;
    /** Return the default provider. Throws if none is configured. */
    getDefault(): T;
    /** List all registered provider ids. */
    list(): string[];
}
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