import { Algodv2 } from "algosdk";
import { UniversalARCNFTMetadata } from "./types";
export declare function Assert(value: boolean, message: string): asserts value is true;
export declare function AssertDefined<T>(value: T | undefined | null, message: string): asserts value is T;
/**
 * Returns the asset info for the given asset index
 * @param assetIndex
 * @returns AssetInfo for given asset index
 * @throws Error if asset index is not found
 */
export declare function getAssetInfo(assetIndex: number, algoClient: Algodv2): Promise<Record<string, any>>;
export declare function convertPotentialIpfsToHttps(url: string | undefined): string | undefined;
/**
 * Extract NFT image from IPFS metadata, with https://ipfs.io/ipfs/ prefix to make it usable without cross-origin issues
 * Understands the different cases that are possible, like ARC3, ARC19, and ARC69. Assumes only an image is present.
 * ARC3 points to JSON with an image link, ARC19 points to JSON with an image link, ARC69 points directly to the image.
 * Also returns the metadata.
 *
 * @param {any} assetInfo
 * @returns {UniversalARCNFTMetadata}
 */
export declare function extractNFTMetadata(assetInfo: any, isMainNet: boolean): Promise<UniversalARCNFTMetadata>;
export declare function arcResolveProtocol(url: string, reserveAddr: string): string;
export declare function getIsARC3Asset(assetInfo: any): boolean;
export declare function getIsARC19Asset(assetInfo: any): boolean;
export declare function getIsARC69Asset(assetInfo: any): Promise<boolean>;
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