import type { IAddress, IChainId, IExplorerType } from '../../types';
/**
 * Generate a block-explorer URL for an address or transaction hash.
 *
 * Returns an empty string when `chain` is falsy or unknown so the return
 * type stays assignable to `string` — preserves the historical public
 * shape from before the file split out of `web3.ts`, where the SDK's
 * `strictNullChecks: false` masked the implicit `undefined` branch and
 * consumers pinned to `string` via the emitted `.d.ts`.
 *
 * @param hex Address or transaction hash
 * @param chain Chain ID
 * @param type Explorer view type (`address`, `tx`, `block`)
 * @returns Full explorer URL, or `''` when `chain` is falsy / unknown.
 */
export declare const explorerLink: (hex: IAddress, chain: IChainId, type: IExplorerType) => string;