Support of ERC-7953.

This EIP proposes the Universal RWA (uRWA) standard, a set of interfaces for tokenized Real World Assets (RWAs) such as securities, real estate, commodities, or other physical/financial assets on the blockchain.

Already supported

function forcedTransfer(address from, address to, uint256 amount) external returns(bool result);
function getFrozenTokens(address account) external view returns (uint256 amount);
function canTransfer(address from, address to, uint256 amount) external view returns (bool allowed);

Modification

ERC20 EnforcementModule:

• Add function setFrozenTokens
• forcedTransferemits the following event:
  event ForcedTransfer(address indexed from, address indexed to, uint256 amount);
• freezePartialTokens/unfreezePartialTokens/setFrozenTokensemits the following event:
  event Frozen(address indexed account, uint256 amount);
• During a transfer, revert with the following error ERC7943InsufficientUnfrozenBalance if the active balance is not enough

An ERC-20 transfer reverts with the following custom error if the active balance is not enough
error ERC7943InsufficientUnfrozenBalance(address account, uint256 amount, uint256 unfrozen);

ValidationModule
Non authorized transfer due to address frozen (EnforcementModule revert with:

error ERC7943CannotTransact(address account);

ValidationModuleAllowlist
Non authorized transfer due to address not whitelisted revert with:

error ERC7943CannotTransact(address account);

CMTAT Base Module
Non authorized transfer revert with:
error ERC7943CannotTransfer(address from, address to, uint256 amount);

Note that this error should not be used often since we will use a most specific custom error message for pause and deactivate

EnforcementModule:
Add function canTransact
function canTransact(address account) external view returns (bool allowed);