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ERC721 Lazy Mint

import "@thirdweb-dev/contracts/base/ERC721LazyMint.sol";

ERC721LazyMint allows you to lazy-mint ERC-721 tokens, which allows any wallet to claim a lazy-minted NFT. It exposes a verifyClaim function that you can override to add your claim-restriction logic.

Lazy minting allows you to define the metadata of NFTs without minting it to an address. As a contract admin, this lets you prepare the metadata for NFTs that will be minted by other wallets, without paying the gas cost for actually minting the NFTs.

Detected Extensions​

Once deployed, you can use the features made available by these extensions on the SDK and dashboard:

Click on each feature to learn more about what functions are available.

Usage​

Import the contract and inherit from it.

// SPDX-License-Identifier: Apache-2.0
pragma solidity ^0.8.0;

import "@thirdweb-dev/contracts/base/ERC721LazyMint.sol";

contract MyNFT is ERC721LazyMint {
    constructor(
        address _defaultAdmin,
        string memory _name,
        string memory _symbol,
        address _royaltyRecipient,
        uint128 _royaltyBps
    ) ERC721LazyMint(_defaultAdmin, _name, _symbol, _royaltyRecipient, _royaltyBps) {}

    function verifyClaim(address _claimer, uint256 _quantity) public view virtual override {
      // Your custom claim restriction logic
    }
}

Functions to Override​

The following functions have been implemented on this contract & are available to be overridden to add custom logic:

tokenURI
/**
     *  @notice         Returns the metadata URI for an NFT.
     *  @dev            See `BatchMintMetadata` for handling of metadata in this contract.
     *
     *  @param _tokenId The tokenId of an NFT.
     */
    function tokenURI(uint256 _tokenId) public view virtual override returns (string memory) {
        string memory batchUri = _getBaseURI(_tokenId);
        return string(abi.encodePacked(batchUri, _tokenId.toString()));
    }
claim
/**
     *  @notice          Lets an address claim multiple lazy minted NFTs at once to a recipient.
     *                   This function prevents any reentrant calls, and is not allowed to be overridden.
     *
     *                   Contract creators should override `verifyClaim` and `transferTokensOnClaim`
     *                   functions to create custom logic for verification and claiming,
     *                   for e.g. price collection, allowlist, max quantity, etc.
     *
     *  @dev             The logic in `verifyClaim` determines whether the caller is authorized to mint NFTs.
     *                   The logic in `transferTokensOnClaim` does actual minting of tokens,
     *                   can also be used to apply other state changes.
     *
     *  @param _receiver  The recipient of the NFT to mint.
     *  @param _quantity  The number of NFTs to mint.
     */
    function claim(address _receiver, uint256 _quantity) public payable nonReentrant {
        require(_currentIndex + _quantity <= nextTokenIdToLazyMint, "Not enough lazy minted tokens.");
        verifyClaim(msg.sender, _quantity); // Add your claim verification logic by overriding this function.

        uint256 startTokenId = _transferTokensOnClaim(_receiver, _quantity); // Mints tokens. Apply any state updates by overriding this function.
        emit TokensClaimed(msg.sender, _receiver, startTokenId, _quantity);
    }
verifyClaim
/**
     *  @notice          Override this function to add logic for claim verification, based on conditions
     *                   such as allowlist, price, max quantity etc.
     *
     *  @dev             Checks a request to claim NFTs against a custom condition.
     *
     *  @param _claimer   Caller of the claim function.
     *  @param _quantity  The number of NFTs being claimed.
     */
    function verifyClaim(address _claimer, uint256 _quantity) public view virtual {}
burn
/**
     *  @notice         Lets an owner or approved operator burn the NFT of the given tokenId.
     *  @dev            ERC721A's `_burn(uint256,bool)` internally checks for token approvals.
     *
     *  @param _tokenId The tokenId of the NFT to burn.
     */
    function burn(uint256 _tokenId) external virtual {
        _burn(_tokenId, true);
    }
_transferTokensOnClaim
    /**
     *  @notice          Mints tokens to receiver on claim.
     *                   Any state changes related to `claim` must be applied
     *                   here by overriding this function.
     *
     *  @dev             Override this function to add logic for state updation.
     *                   When overriding, apply any state changes before `_safeMint`.
     */
    function _transferTokensOnClaim(address _receiver, uint256 _quantity)
        internal
        virtual
        returns (uint256 startTokenId)
    {
        startTokenId = _currentIndex;
        _safeMint(_receiver, _quantity);
    }