Title: “ERC721: Accept for caller” Metamask Error: ERC721 Open Zeppel (Buy NFT) in Polygon
Introduction:
Welcome! I will be happy to help solve the general problem that many web3 developers face, especially through a chain of polygons. In this article, we are examining why the error “ERC721: accept for caller” occurs when you try to buy the NFT Polygon Netheron Metamask portfolio.
Understanding of the topic:
The error “ERC721: accepts for the caller” is a common problem on web3, which may be due to a series of factors. In this case, it is related to the way the ERC721 OPENSEPPEL contract works when it is used to buy NFT with Metamask. In particular, the application concerns how the agreement deals with the approval of the brand owners.
ERC721 and approval:
When the ERC721 is enabled on the Blockchain platform, such as Polygon, it will charge some integrated functions to allow users to buy and sell NFT with their wallet addresses. However, this functionality is based on the user’s metamask portfolio, which accepts events with certain beams before being transferred.
Metamask problem:
When trying to use the Buy (_Takenid) 'function in your ERC721 agreement, call' accept (_OWNER) _amount 'to allow another account (in this case
) to transfer the specified property. When you try to buy your NFT metamask wallet, it fails because the "accept" function is called without further approvals.
Solution:
To solve this problem and successfully use the "Buy (_Takenid)" function of the ERC721 contract with Metamask, follow these steps:
- Install the ERC721 OPENSEPPEL agreement: Make sure you have installed ERC721 OPENSEPPELPELPELPEL with the help of web3.js or a similar library.
2
- USABuy (_Takenid)
accepts” : when it is called `_tokkenid) ” ‘, passes as topics _OWerand the requested'.' Before buying NFT.
Here is an updated version of your code:
Javascript
Const {Etterit} = Requirements (‘Web3’);
// Suppose we have created a new ERC721 contract using web3.js
Async Buyft function (_Tokenid, _OWNER, _amount) {
Attempt {
// Get expression of the ERC721 contractpel contract
Const ERC721 = WAITTHERS.GETCONCONTCTCTFactory (‘OPENZEPPELINCIRC721’);
// Start and the contract begins
Const tokeninnce = Wait ERC721.Deploy ();
Wait for tokeninsance.depLoyed ();
// calls “Buy” in the contract
Const Result = Wait tokencence.buy (_Tokenid, _owner, _Mount);
Return result;
} Catch (error) {
Console.error (‘purchase of an NFT error:’, error);
launch an error; // REPLAGE ERROR ON CALL superification
}
}
// Use example:
Const Polygonaddress = ‘ // Replace the polygon with a block soup
Const Tokenid = ‘0x …’; // Replace the favorite ERC721 ID ERC721
Const Owner = ‘0x …’; // Replace the address of the Medamask portfolio
Const amount = ‘1,000 ether’; // Replace the amount purchased
Buyft (tokenid, owner, quantity)
. So ((result) => {
Console.log (result);
})
.Catch ((error) => {
Console.error (‘purchase of an NFT error:’, error);
});
`
Conclusion:
Following these steps and updating the code with the action call "accepts" before using the_tokkenid) in the ERC721 contract, you should be able to successfully buy your NFT Polyon Netheron Metamask portfolio. Remember to replace the positions (for example https: // Polygon.io/,_takenid) with your real values.