export declare const VALID_CHAINS: readonly ["sol", "eth", "bsc", "base"];
export declare const FEED_CHAINS: readonly ["sol", "bsc"];
export declare const FEED_TYPES: readonly ["NEW", "ALMOST", "COMPLETED"];
export declare const TRENDING_PERIODS: readonly ["1M", "5M", "30M", "1H", "6H", "24H"];
export declare const VALID_FEE_RATES: readonly [1, 3, 5, 10];
export type Chain = (typeof VALID_CHAINS)[number];
export type FeedChain = (typeof FEED_CHAINS)[number];
export declare const NATIVE_TOKEN: Record<Chain, string>;
export declare function validateChain(chain: string): Chain;
export declare function validateFeedChain(chain: string): FeedChain;
export declare function validateWalletAddress(address: string, chain: Chain): void;
export declare function validateContractAddress(address: string, chain: Chain): void;
export declare function validateTip(tip: number, chain: Chain): string | null;
export declare function explorerUrl(chain: Chain, txId: string): string;