Protocol ERC721 Token Minimal Implementation

Purpose

The IProtocolToken interface contains the minimal set of functions that must be implemented in order for an ERC721 token to be compatible with the protocol.

Function Overview

The following functions have been defined in the IProtocolToken interface and must be implemented:

• connectHandlerToToken: Used to connect a deployed Protocol Token Handler to the token.

function connectHandlerToToken(address _handlerAddress) external appAdministratorOnly(appManagerAddress)

• getHandlerAddress: used to retrieve the address of the Protocol Token Handler.

function getHandlerAddress() external view override returns (address)

checkAllRules Hook

The token must also override the _beforeTokenTransfer function and add a call to the checkAllRules hook defined in the IProtocolTokenHandler interface (using the handler address set in the above functions). Example:

    function _beforeTokenTransfer(address from, address to, uint256 amount) internal override {
        /// Rule Processor Module Check
        require(IProtocolTokenHandler(address(handler)).checkAllRules(balanceOf(from), balanceOf(to), from, to, _msgSender(), amount));
        super._beforeTokenTransfer(from, to, amount);
    }

ERC165

The protocol relies on ERC721 tokens inheriting ERC165 interface standard. If your token does not inherit ERC165 rules that rely on pricing may not function as intended.