Hi, I am trying to implement this for my own project but I am unable to compile my contracts. Here is my contract: // SPDX-License-Identifier: MIT pragma solidity ^0.8.0; import "@openzeppelin/contracts/access/AccessControl.sol"; import "@openzeppelin/contracts/utils/Context.sol"; import "@open…

Hello Matteo, welcome to the forum! What version of Contracts are you using? ERC721 comes with _setTokenUri now. Check this previous discussion: [image] Why doesn't OpenZeppelin ERC721 contain setTokenURI? Contracts Hi @novaknole ! This was split off into a separate contra…

@Matteo_Lunghi _setBaseURI has been removed from OpenZeppelin Contracts 4.0. Sorry about the current lack of documentation around this. You can read about the reasoning behind this in the announcement for 4.0 in the section about ERC721. The current way to customize the base URI is to override the…

Thanks guys. On an unrelated note, I am currently passing all my tests except 1 and I don’t understand why. This is the error I get: Error: Returned error: VM Exception while processing transaction: revert ERC721: token already minted – Reason given: ERC721: token already minted. What does this me…

You’re reusing a tokenId that has already been minted: OpenZeppelin/openzeppelin-contracts/blob/master/contracts/token/ERC721/ERC721.sol#L258 * * Requirements: * * - `tokenId` must not exist. * - `to` cannot be the zero address. * * Emits a {Transfer} event. */ function _mint(addre…

I see that tokenSupply() is gone from new contracts. I am following this repository: https://github.com/chentschel/nft-marketplace/tree/master/contracts But I receive the above error. Any ideas? Thanks so much for your help!

Was this part of ERC721 previously?

Yes it used to be built in. It’s explained in the announcement I linked above.

I'm importing 721URIStorage, which eliminated my "setTokenURI" error but I am still getting the "undeclared Identifier" error for _setBaseURI, which worked before I started converting the contract to pragma8. Help please.

Hi @metaverde , _setBaseURI is no longer available. You can add it back by overriding the _baseURI function like so: string internal baseURI; function _baseURI() internal view override returns (string memory) { return baseURI; } Instead of _setBaseURI you can assign to the variable baseURI.

DeclarationError: Undeclared identifier error when using _setBaseURI

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frangio May 12, 2021, 6:14pm 7

If you need totalSuply() you have to inherit ERC721Enumerable. See the section about " ERC721 Enumerability" in OpenZeppelin Contracts 4.0.

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Topic		Replies	Views
Following Error: DeclarationError: Undeclared identifier. contracts/GorillaNFT.sol:98:5: \| 98 \| _setTokenURI(tokenId, tokenURI); CAN ANYONE HELP PLZ? Contracts erc721 , solidity , bep20	4	444	March 7, 2024
Can't find _SetBaseURI() in ERC721 contracts although your doc talks about it Contracts	5	1007	January 20, 2022
Function _setTokenURI() in ERC721 is gone with pragma ^0.8.0 Contracts erc721	34	33838	November 15, 2021
Removal of _setBaseURI() from ERC721 contracts in v4.X Contracts	1	520	November 4, 2021
The ERC721 sample in official doc is not working anymore Contracts erc721	2	730	April 16, 2021

DeclarationError: Undeclared identifier error when using _setBaseURI

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