📌approve

Description

The approve function allows the owner of an ERC721 token to grant approval to another address or contract to transfer the token on their behalf.

Parameters

Parameter	Type	Description
blockchain	string	The blockchain network to use, e.g., Ethereum, Binance Smart Chain
contractAddress	string	The address of the ERC721 contract containing the token
tokenId	string	The ID of the token to approve for transfer
spender	string	The address of the account or contract to grant transfer approval
privateKey	string	The private key of the token owner's account

Response

Field	Type	Description
code	number	1 for success, 0 for failure
receipt	object	The transaction receipt of the approve transaction

Example Request and Response

Prerequisites

Before making requests with NO.AI SDK, you must have it installed.

You can install NO.AI SDK using either npm or yarn. Use the following commands to install NO.AI SDK:

npm install @nest25/evm-chains-lib
OR
yarn add @nest25/evm-chains-lib

Request

Here is an example of how to make a approve request using the NO.AI SDK:

const {ERC721} = require('@nest25/evm-chains-lib')
// create a new wallet instance
const erc721 = new ERC721();
const privateKey = "your private key here"

const main = async () => {
    // approve erc721 token
    const receipt=await erc721.approve(
        'klay',
        '0xE4eD9066bD1A34994445cAd01Cb9A73A59b8A045',
        '1',
        '0xE668C72D4C67236A712Ce69A91C74358586f31ed',
        privateKey
        )
    // print receipt
    console.log(receipt);
}
main()

Response

Use Cases

• Crypto wallets: They can use this function to grant approval to other addresses or contracts to transfer their ERC721 tokens on their behalf.

• DApp developers: Developers can use this function to enable users to grant approval to their smart contracts to transfer their ERC721 tokens.