TokenLogic

TokenLogic

This should be inherited by the token logic contract

An abstract contract to be inherited by a token logic contract. This contract inherits from TokenERC1820Provider, TokenRoles and ExtendableHooks. It is recommended that a token logic contract inherit from a TokenERC1820Provider contract or implement those functions.

This contract uses the TokenERC1820Provider to automatically register the required token logic interface name to the ERC1820 registry. This is used by the token proxy contract to lookup the current token logic address.

The child contract should override _onInitialize to determine how the logic contract should initalize when it’s attached to a proxy. This occurs during deployment and during upgrading.

constructor() (internal)

Register token logic interfaces to the ERC1820 registry. These interface names are provided by TokenERC1820Provider implementing contract.

_extractExtraCalldata(uint256 normalCallsize) → bytes (internal)

initialize(bytes data) (external)

This cannot be invoked directly. It must be invoked by a TokenProxy inside of upgradeTo or in the consturctor.

This function can only be invoked if the uint256 value in the UPGRADING_FLAG_SLOT storage slot is non-zero and matches the length of the data provided

_onInitialize(bool isConstructor, bytes data) → bool (internal)

To be implemented by the child logic contract. This function is invoked when the logic contract is attached to the proxy, either through the constructor or when upgrading. When attached during deployment, the data length will be the encoded constructor arguments inside TokenProxy. When attached inside upgradeTo, the data passed along with the upgradeTo call will be passed here.