Description

Checks if the provided address is a smart contract.

Parameters

Response

Example Request and Response

Prerequisite: You will need to install the Alchemy SDK before making requests with it.

The commands for installing it using npm or yarn are given below:

$
npm install alchemy-sdk

Request

Here is an example of how to make an isContractAddress request using the Alchemy SDK:

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// Imports the Alchemy SDK
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const { Alchemy, Network } = require("alchemy-sdk");
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// Configures the Alchemy SDK
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const config = {
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    apiKey: "demo", // Replace with your API key
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    network: Network.ETH_MAINNET, // Replace with your network
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};
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// Creates an Alchemy object instance with the config to use for making requests
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const alchemy = new Alchemy(config);
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const main = async () => {
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    const result = await alchemy.core.isContractAddress("0xC02aaA39b223FE8D0A0e5C4F27eAD9083C756Cc2"); // Wrapped ETH address
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    // Logging the response to the console
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    console.log(result)
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}
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main();

Response

$
true

Use Cases

Here are some common use cases for the isContractAddress method:

• Verifying the contract status of an address: It’s important to know the type of an address (Externally Owned Address or Contract Address) in many blockchain related operations. This function allows developers to verify if an address is a smart contract.

• Improving security: Before interacting with an address, verifying its type can add an extra layer of security to prevent potential exploits ( for example, reentrancy attacks ) or mistakes.

Related Methods

Here are the methods related to isContractAddress:

• getBalance: Returns the balance of a given address as of the provided block.
• call: Returns the result of executing a transaction, using call.