Support layer zero protocol to mint tokens on L2s #53
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boyuan-chen
commented
Jul 12, 2022
| uint8 private immutable _decimals; | ||
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| // Allow us to register a bridge to mint and burn tokens | ||
| mapping(address => bool) public whitelistBridges; |
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The whitelistBridges is added
| import { Ownable } from "@openzeppelin/contracts/access/Ownable.sol"; | ||
| import "./IL2StandardERC20.sol"; | ||
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| contract L2StandardERC20LayerZero is IL2StandardERC20, ERC20, Pausable, Ownable { |
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The owner can pause this contract for the security consideration.
| /*********************/ | ||
| modifier onlyWhitelistBridge() { | ||
| require( | ||
| msg.sender == l2Bridge || whitelistBridges[msg.sender], |
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l2Bridge and msg.sender in whitelistBridges can mint and burn tokens.
| * @param _symbol ERC20 symbol. | ||
| * @param _decimals ERC20 decimals. | ||
| */ | ||
| function createStandardLayerZeroL2Token( |
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The createStandardLayerZeroL2Token is added for contracts that can be minted by third party.
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This introduces a whitelist system in
L2StandardERC20LayerZero.solfor theL2_BOBA.sol. Any contracts or addresses in the whitelist are allowed to mint tokens.