> For the complete documentation index, see [llms.txt](https://dev.bondprotocol.finance/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://dev.bondprotocol.finance/smart-contracts/bond-system/callback/sample-callback-contract.md).

# Sample Callback Contract

For issuers that do not have custom logic to implement in the callback function, but would like to receive Quote Tokens and pay out Payout Tokens from a standalone contract vs. a multi-sig or EOA, the [Sample Callback Contract](https://github.com/Bond-Protocol/bond-contracts/blob/master/src/BondSampleCallback.sol) has been implemented to facilitate this. 

This contract inherits the Base Callback and transfers the requested Payout Tokens to the Teller after confirming that the correct number of Quote Tokens have been transferred in. 

This contract relies on a good data trust assumption from the Teller.