# Helpers ### **BalanceHelper** It provides a utility function to batch requests to check the balances and allowances of a user for a given list of ERC20 tokens. #### Contract functions description **`balancesOf`** ### **PayoutHelper** It provides a utility function to query the execution payout of a given derivative recipe with different results. #### Contract functions description **`getExecutionPayouts`** ### **HasCommission** It provides a set of functions that can be implemented by a derivative recipe contract in order to query and set the data related to the commission that the derivative recipe’s author should receive. #### Contract functions description **`getAuthorAddress() public view returns(address)`** It returns the address of the derivative author - which is set when the `HasCommission` contract is deployed as its `msg.sender` **`getAuthorCommission() public view returns(uin256)`** It returns the commission received by the derivative author when the derivative is executed. The commission is set as a constant at 0.25% of the payout’s profit. ### **ExecutableByThirdParty** It provides a set of functions that can be implemented by a derivative recipe contract in order to allow a third-party to request its execution after maturity and to query whether the third party execution has already been allowed. #### Contract functions description **`thirdpartyExecutionAllowed`** It checks whether any third-party is allowed to execute a synthetic's position on behalf of `msg.sender.` **`allowThirdpartyExecution`** It allows msg.sender to enable any third-party to perform the execution of their positions on their behalf. --- # 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/helpers.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.