DAU ERC20 token backed by physical gold smart contract repository.
DAU ERC20 is an ERC20 token that is Centrally Minted and Burned, representing the physical ownership of gold bars.
The public interface of DAU ERC20 is the ERC20 interface specified by EIP-20.
name()symbol()decimals()totalSupply()balanceOf(address who)transfer(address to, uint256 value)approve(address spender, uint256 value)allowance(address owner, address spender)transferFrom(address from, address to, uint256 value)
And the usual events.
event Transfer(address indexed from, address indexed to, uint256 value)event Approval(address indexed owner, address indexed spender, uint256 value)
Typical interaction with the contract will use transfer to move the token as payment.
Additionally, a pattern involving approve and transferFrom can be used to allow another
address to move tokens from your address to a third party without the need for the middleperson
to custody the tokens, such as in the 0x protocol.
The total supply of DAU ERC20 is backed by physical gold/
In the event of a critical security threat, DAU has the ability to pause transfers of the DAU token. The ability to pause is controlled by an address with a PAUSER_ROLE.
The simple model for pausing transfers following OpenZeppelin's Pausable.
DAU charges a set fee rate for all on-chain transfers of DAU ERC20. The fee controller has the ability to set the fee accumulator and the fee rate (measured in 1/100th of a basis point). DAU will never change the fee rate without prior notice as we take transparency very seriously.
As required by our regulators, we have introduced a role for asset protection to freeze or seize the assets of a criminal party when required to do so by law, including by court order or other legal process.
The CONTROLLER_ROLE can freeze and unfreeze the DAU ERC20 balance of any address on chain.
Freezing is something that DAU will not do on its own accord, and as such we expect to happen extremely rarely.
In order to allow for gas-less transactions we have implemented support for EIP-2612 based on https://docs.openzeppelin.com/contracts/4.x/api/token/erc20#ERC20Permit.
To facilitate upgradeability on the immutable blockchain we follow a ERC-1822: Universal Upgradeable Proxy Standard based on OpenZeppelin implemetation.
The DAU ERC20 is also a cross chain enabled token derived from the CATERC20 Standard, It uses BridgeIn and BridgeOut functionality to enable DAU to be deployed on multiple chains and enable cross chain transfers.