Lossless Controller is the core contract of the Lossless protocol. Every lossless protected token calls this contract before every transfer, transferFrom, approve, or any other function. The controller determines if the function can proceed and in cases where it cannot proceed this call reverts in turn reverting the ERC20 function call.
The controller is an upgradable smart contract that's using an upgradable transparent proxy pattern.
The controller does only a minimal amount of validation and the rest of the logic of lossless protocol lives on other smart contracts (see Vault and Treasury Protection). In the deployments section, you will find lossless controller addresses for different blockchains.