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Implement a maximum minting cap or require multi-signature approval for bulk mints. #36

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Implement a maximum minting cap or require multi-signature approval for bulk mints. #36

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e7ae64d
fixing-minting-limit
aniket866 Feb 24, 2026
0f73fa9
Code rabbit follow-up
aniket866 Feb 24, 2026
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14 changes: 14 additions & 0 deletions contracts/src/TNT.sol
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Original file line number Diff line number Diff line change
Expand Up @@ -16,6 +16,9 @@ contract TNT is ERC721, AccessControl {
error NotOwner();
error InvalidIndex();
error NonTransferable();
error MaxSupplyReached();
error MaxSupplyTooLow(uint256 requested, uint256 alreadyMinted);
event MaxSupplyUpdated(uint256 previous, uint256 next);

bytes32 public constant MINTER_ROLE = keccak256("MINTER_ROLE");
bytes32 public constant REVOKER_ROLE = keccak256("REVOKER_ROLE");
Expand All @@ -28,6 +31,7 @@ contract TNT is ERC721, AccessControl {
bool public immutable revokable;
address public factoryContract;
string public imageURL;
uint256 public maxSupply;

struct TokenMetadata {
uint256 issuedAt;
Expand All @@ -54,8 +58,18 @@ contract TNT is ERC721, AccessControl {
imageURL = _imageURL;
}

function setMaxSupply(uint256 _maxSupply) external onlyRole(DEFAULT_ADMIN_ROLE) {
if (_maxSupply != 0 && _maxSupply < _nextTokenId) {
revert MaxSupplyTooLow(_maxSupply, _nextTokenId);
}
emit MaxSupplyUpdated(maxSupply, _maxSupply);
maxSupply = _maxSupply;
}

function issueToken(address user) public onlyRole(MINTER_ROLE) {
if (user == address(0)) revert InvalidUser();

if (maxSupply > 0 && _nextTokenId >= maxSupply) revert MaxSupplyReached();

uint256 tokenId = _nextTokenId++;
_safeMint(user, tokenId);
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