import type { AccountId, AssetsControllerGetAccountAssetByIDAction, AssetsControllerGetAccountAssetsByIDsAction, AssetsControllerGetAccountAssetsByScopeAction, Caip19AssetId } from "@metamask/assets-controller";
import type { Messenger } from "@metamask/messenger";
import { AsyncMessenger } from "@metamask/snaps-sdk";
import type { CaipChainId } from "@metamask/utils";
/**
 * Namespace for the {@link AssetsProvider} messenger.
 */
export declare const ASSETS_PROVIDER_NAME: "AssetsProvider";
/**
 * Actions from other messengers that {@link AssetsProvider} calls.
 */
export type AssetsProviderAllowedActions = AssetsControllerGetAccountAssetByIDAction | AssetsControllerGetAccountAssetsByIDsAction | AssetsControllerGetAccountAssetsByScopeAction;
/**
 * Messenger restricted to actions consumed by {@link AssetsProvider}.
 */
export type AssetsProviderMessenger = AsyncMessenger<Messenger<typeof ASSETS_PROVIDER_NAME, AssetsProviderAllowedActions>>;
export declare class AssetsProvider {
    #private;
    constructor({ messenger }: {
        messenger: AssetsProviderMessenger;
    });
    /**
     * Returns a single account asset by CAIP-19 ID, or `undefined` if missing.
     *
     * @param accountId - Keyring account ID.
     * @param assetId - CAIP-19 asset ID.
     * @returns Controller asset, or `undefined`.
     */
    getAccountAssetByID(accountId: AccountId, assetId: Caip19AssetId): Promise<ReturnType<AssetsControllerGetAccountAssetByIDAction['handler']>>;
    /**
     * Returns account assets for the given CAIP-19 IDs, keyed by asset ID.
     *
     * @param accountId - Keyring account ID.
     * @param assetIds - CAIP-19 asset IDs to resolve.
     * @returns Map of asset ID → controller asset.
     */
    getAccountAssetsByIDs(accountId: AccountId, assetIds: Caip19AssetId[]): Promise<ReturnType<AssetsControllerGetAccountAssetsByIDsAction['handler']>>;
    /**
     * Returns controller-backed assets for an account on a chain.
     *
     * @param scope - CAIP-2 chain ID to filter controller results.
     * @param accountId - Keyring account ID.
     * @returns Controller assets keyed by CAIP-19 asset ID.
     */
    getAccountAssetsByScope(scope: CaipChainId, accountId: AccountId): Promise<ReturnType<AssetsControllerGetAccountAssetsByScopeAction['handler']>>;
}
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