pragma solidity 0.4.24; import "./Upgradeable.sol"; import "./InitializableBridge.sol"; import "openzeppelin-solidity/contracts/AddressUtils.sol"; import "./Validatable.sol"; import "./Ownable.sol"; import "./Claimable.sol"; import "./VersionableBridge.sol"; import "./DecimalShiftBridge.sol"; contract BasicBridge is InitializableBridge, Validatable, Ownable, Upgradeable, Claimable, VersionableBridge, DecimalShiftBridge { event GasPriceChanged(uint256 gasPrice); event RequiredBlockConfirmationChanged(uint256 requiredBlockConfirmations); bytes32 internal constant GAS_PRICE = 0x55b3774520b5993024893d303890baa4e84b1244a43c60034d1ced2d3cf2b04b; // keccak256(abi.encodePacked("gasPrice")) bytes32 internal constant REQUIRED_BLOCK_CONFIRMATIONS = 0x916daedf6915000ff68ced2f0b6773fe6f2582237f92c3c95bb4d79407230071; // keccak256(abi.encodePacked("requiredBlockConfirmations")) /** * @dev Public setter for fallback gas price value. Only bridge owner can call this method. * @param _gasPrice new value for the gas price. */ function setGasPrice(uint256 _gasPrice) external onlyOwner { _setGasPrice(_gasPrice); } function gasPrice() external view returns (uint256) { return uintStorage[GAS_PRICE]; } function setRequiredBlockConfirmations(uint256 _blockConfirmations) external onlyOwner { _setRequiredBlockConfirmations(_blockConfirmations); } function _setRequiredBlockConfirmations(uint256 _blockConfirmations) internal { require(_blockConfirmations > 0); uintStorage[REQUIRED_BLOCK_CONFIRMATIONS] = _blockConfirmations; emit RequiredBlockConfirmationChanged(_blockConfirmations); } function requiredBlockConfirmations() external view returns (uint256) { return uintStorage[REQUIRED_BLOCK_CONFIRMATIONS]; } /** * @dev Internal function for updating fallback gas price value. * @param _gasPrice new value for the gas price, zero gas price is allowed. */ function _setGasPrice(uint256 _gasPrice) internal { uintStorage[GAS_PRICE] = _gasPrice; emit GasPriceChanged(_gasPrice); } }