# TokenMinter Its main responsibility is to perform actions on tokens representing the **LONG** and **SHORT** positions of a financial product. As the Opium Protocol makes use of its own token standard `ERC721O`, the `TokenMinter` exposes a set of functions to work with it. Its main consumer in the Opium Protocol is the Core contract, which makes use of the `TokenMinter` to mint **LONG**/**SHORT** positions upon the creation of a new financial product and burn them after the successful execution of the said financial product. ### Contract functions description **`mint(address _buyer, address _seller, bytes32 _derivativeHash, uint256 _quantity) external`** Wrapper around `ERC7210BackwardCompatible` `_mint`. It mints **LONG** and **SHORT** `ERC721O` tokens according to the specified quantity respectively to the buyer and the seller. The `tokenId` of the **LONG** and **SHORT** position token is computed based on the provided `_derivativeHash`. The access to the function is restricted by the `onlyCore` modifier which grants its usage only to the `Core` contract. **`mint(address _buyer, bytes32 _derivativeHash, uint256 _quantity)`** only for pooled **`burn(address _tokenOwner, uint256 _tokenId, uint256 _quantity) external`** Wrapper around ERC7210BackwardCompatible `_burn`. It burns a specified `tokenId` position on behalf of a `_tokenOwner`. The access to the function is restricted by the `onlyCore` modifier which grants its usage only to the `Core` contract. **`name() external view returns(string memory)`** It returns a common name for all the position tokens. **`symbol() external external view returns(string memory)`** It returns a common symbol for all the position tokens. **`isApprovedOrOwner(address _spender, address _owner, uint256 _tokenId) public view returns(bool)`** **`isOpiumSpender(address _spender) public view returns(bool)`** --- # Agent Instructions: Querying This Documentation If you need additional information that is not directly available in this page, you can query the documentation dynamically by asking a question. Perform an HTTP GET request on the current page URL with the `ask` query parameter: ``` GET https://docs.opium.network/for-developers/protocol/tokenminter.md?ask= ``` The question should be specific, self-contained, and written in natural language. The response will contain a direct answer to the question and relevant excerpts and sources from the documentation. Use this mechanism when the answer is not explicitly present in the current page, you need clarification or additional context, or you want to retrieve related documentation sections.