hardhat/internal/util/lazy.d.ts

Hardhat is an extensible developer tool that helps smart contract developers increase productivity by reliably bringing together the tools they want.

/**
 * This module provides function to implement proxy-based object, functions, and
 * classes (they are functions). They receive an initializer function that it's
 * not used until someone interacts with the lazy element.
 *
 * This functions can also be used like a lazy `require`, creating a proxy that
 * doesn't require the module until needed.
 *
 * The disadvantage of using this technique is that the type information is
 * lost wrt `import`, as `require` returns an `any. If done with enough care,
 * this can be manually fixed.
 *
 * TypeScript doesn't emit `require` calls for modules that are imported only
 * because of their types. So if one uses lazyObject or lazyFunction along with
 * a normal ESM import you can pass the module's type to this function.
 *
 * An example of this can be:
 *
 *    import findUpT from "find-up";
 *    export const findUp = lazyFunction<typeof findUpT>(() => require("find-up"));
 *
 * You can also use it with named exports:
 *
 *    import { EthT } from "web3x/eth";
 *    const Eth = lazyFunction<typeof EthT>(() => require("web3x/eth").Eth);
 */
export declare function lazyObject<T extends object>(objectCreator: () => T): T;
export declare function lazyFunction<T extends Function>(functionCreator: () => T): T;
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