contracts-bedrock: eip 1967 constants in Constants.sol

op-bindings/bindings/proxy_more.go

@@ -13,7 +13,7 @@ const ProxyStorageLayoutJSON = "{\"storage\":null,\"types\":{}}"
 
 var ProxyStorageLayout = new(solc.StorageLayout)
 
-var ProxyDeployedBin = "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"
+var ProxyDeployedBin = "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"
 
 func init() {
 	if err := json.Unmarshal([]byte(ProxyStorageLayoutJSON), ProxyStorageLayout); err != nil {

packages/contracts-bedrock/.gas-snapshot

@@ -25,6 +25,7 @@ Bytes_slice_Test:test_slice_fromZeroIdx_works() (gas: 20804)
 Bytes_toNibbles_Test:test_toNibbles_expectedResult128Bytes_works() (gas: 78882)
 Bytes_toNibbles_Test:test_toNibbles_expectedResult5Bytes_works() (gas: 3992)
 Bytes_toNibbles_Test:test_toNibbles_zeroLengthInput_works() (gas: 823)
+Constants_Test:test_eip1967Constants_succeeds() (gas: 453)
 CrossDomainMessenger_BaseGas_Test:test_baseGas_succeeds() (gas: 20435)
 CrossDomainOwnable2_Test:test_onlyOwner_notMessenger_reverts() (gas: 8461)
 CrossDomainOwnable2_Test:test_onlyOwner_notOwner2_reverts() (gas: 57515)
@@ -239,7 +240,7 @@ L2OutputOracleUpgradeable_Test:test_initValuesOnImpl_succeeds() (gas: 23902)
 L2OutputOracleUpgradeable_Test:test_initValuesOnProxy_succeeds() (gas: 46800)
 L2OutputOracleUpgradeable_Test:test_initializeImpl_alreadyInitialized_reverts() (gas: 15216)
 L2OutputOracleUpgradeable_Test:test_initializeProxy_alreadyInitialized_reverts() (gas: 20216)
-L2OutputOracleUpgradeable_Test:test_upgrading_succeeds() (gas: 191346)
+L2OutputOracleUpgradeable_Test:test_upgrading_succeeds() (gas: 191348)
 L2OutputOracle_constructor_Test:test_constructor_l2BlockTimeZero_reverts() (gas: 39212)
 L2OutputOracle_constructor_Test:test_constructor_submissionInterval_reverts() (gas: 39222)
 L2OutputOracle_constructor_Test:test_constructor_succeeds() (gas: 51777)
@@ -430,7 +431,7 @@ OptimismMintableTokenFactory_Test:test_createStandardL2Token_succeeds() (gas: 12
 OptimismPortalUpgradeable_Test:test_initialize_cannotInitImpl_reverts() (gas: 11178)
 OptimismPortalUpgradeable_Test:test_initialize_cannotInitProxy_reverts() (gas: 16111)
 OptimismPortalUpgradeable_Test:test_params_initValuesOnProxy_succeeds() (gas: 26781)
-OptimismPortalUpgradeable_Test:test_upgradeToAndCall_upgrading_succeeds() (gas: 191412)
+OptimismPortalUpgradeable_Test:test_upgradeToAndCall_upgrading_succeeds() (gas: 191414)
 OptimismPortal_FinalizeWithdrawal_Test:test_finalizeWithdrawalTransaction_ifOutputRootChanges_reverts() (gas: 178667)
 OptimismPortal_FinalizeWithdrawal_Test:test_finalizeWithdrawalTransaction_ifOutputTimestampIsNotFinalized_reverts() (gas: 182306)
 OptimismPortal_FinalizeWithdrawal_Test:test_finalizeWithdrawalTransaction_ifWithdrawalNotProven_reverts() (gas: 41780)
@@ -533,11 +534,11 @@ ProxyAdmin_Test:test_delegateResolvedGetProxyAdmin_succeeds() (gas: 17691)
 ProxyAdmin_Test:test_delegateResolvedGetProxyImplementation_succeeds() (gas: 62028)
 ProxyAdmin_Test:test_delegateResolvedUpgradeAndCall_succeeds() (gas: 98039)
 ProxyAdmin_Test:test_delegateResolvedUpgrade_succeeds() (gas: 58482)
-ProxyAdmin_Test:test_erc1967ChangeProxyAdmin_succeeds() (gas: 33812)
+ProxyAdmin_Test:test_erc1967ChangeProxyAdmin_succeeds() (gas: 33820)
 ProxyAdmin_Test:test_erc1967GetProxyAdmin_succeeds() (gas: 15616)
-ProxyAdmin_Test:test_erc1967GetProxyImplementation_succeeds() (gas: 52071)
-ProxyAdmin_Test:test_erc1967UpgradeAndCall_succeeds() (gas: 78969)
-ProxyAdmin_Test:test_erc1967Upgrade_succeeds() (gas: 50078)
+ProxyAdmin_Test:test_erc1967GetProxyImplementation_succeeds() (gas: 52073)
+ProxyAdmin_Test:test_erc1967UpgradeAndCall_succeeds() (gas: 78971)
+ProxyAdmin_Test:test_erc1967Upgrade_succeeds() (gas: 50080)
 ProxyAdmin_Test:test_isUpgrading_succeeds() (gas: 19442)
 ProxyAdmin_Test:test_onlyOwner_notOwner_reverts() (gas: 22767)
 ProxyAdmin_Test:test_owner_succeeds() (gas: 9738)
@@ -547,16 +548,16 @@ ProxyAdmin_Test:test_setImplementationName_notOwner_reverts() (gas: 11111)
 ProxyAdmin_Test:test_setImplementationName_succeeds() (gas: 38945)
 ProxyAdmin_Test:test_setProxyType_notOwner_reverts() (gas: 10814)
 Proxy_Test:test_delegatesToImpl_succeeds() (gas: 45207)
-Proxy_Test:test_implementationKey_succeeds() (gas: 20909)
-Proxy_Test:test_implementation_isZeroAddress_reverts() (gas: 47626)
+Proxy_Test:test_implementationKey_succeeds() (gas: 20911)
+Proxy_Test:test_implementation_isZeroAddress_reverts() (gas: 47628)
 Proxy_Test:test_implementation_zeroAddressCaller_succeeds() (gas: 14752)
-Proxy_Test:test_ownerKey_succeeds() (gas: 19059)
-Proxy_Test:test_ownerProxyCall_notAdmin_succeeds() (gas: 34615)
-Proxy_Test:test_proxyCallToImp_notAdmin_succeeds() (gas: 30008)
-Proxy_Test:test_upgradeToAndCall_functionDoesNotExist_reverts() (gas: 104565)
-Proxy_Test:test_upgradeToAndCall_isPayable_succeeds() (gas: 53742)
-Proxy_Test:test_upgradeToAndCall_succeeds() (gas: 125190)
-Proxy_Test:test_upgradeTo_clashingFunctionSignatures_succeeds() (gas: 101359)
+Proxy_Test:test_ownerKey_succeeds() (gas: 19067)
+Proxy_Test:test_ownerProxyCall_notAdmin_succeeds() (gas: 34623)
+Proxy_Test:test_proxyCallToImp_notAdmin_succeeds() (gas: 30010)
+Proxy_Test:test_upgradeToAndCall_functionDoesNotExist_reverts() (gas: 104567)
+Proxy_Test:test_upgradeToAndCall_isPayable_succeeds() (gas: 53744)
+Proxy_Test:test_upgradeToAndCall_succeeds() (gas: 125192)
+Proxy_Test:test_upgradeTo_clashingFunctionSignatures_succeeds() (gas: 101363)
 RLPReader_readBytes_Test:test_readBytes_bytestring00_succeeds() (gas: 1863)
 RLPReader_readBytes_Test:test_readBytes_bytestring01_succeeds() (gas: 1840)
 RLPReader_readBytes_Test:test_readBytes_bytestring7f_succeeds() (gas: 1861)
@@ -631,7 +632,7 @@ ResourceMetering_Test:test_meter_useMax_succeeds() (gas: 20020816)
 ResourceMetering_Test:test_meter_useMoreThanMax_reverts() (gas: 19549)
 SafeCall_Test:test_callWithMinGas_noLeakageHigh_succeeds() (gas: 1021670598)
 SafeCall_Test:test_callWithMinGas_noLeakageLow_succeeds() (gas: 1095190710)
-Semver_Test:test_behindProxy_succeeds() (gas: 506748)
+Semver_Test:test_behindProxy_succeeds() (gas: 507558)
 Semver_Test:test_version_succeeds() (gas: 9418)
 SequencerFeeVault_L2Withdrawal_Test:test_withdraw_toL2_succeeds() (gas: 78333)
 SequencerFeeVault_L2Withdrawal_Test:test_withdraw_toL2recipientReverts_fails() (gas: 46486)
@@ -643,11 +644,11 @@ SequencerFeeVault_Test:test_withdraw_toL1_succeeds() (gas: 171357)
 SetPrevBaseFee_Test:test_setPrevBaseFee_succeeds() (gas: 11549)
 StandardBridge_Stateless_Test:test_isCorrectTokenPair_succeeds() (gas: 49936)
 StandardBridge_Stateless_Test:test_isOptimismMintableERC20_succeeds() (gas: 33072)
-SystemConfig_Initialize_Test:test_initialize_events_succeeds() (gas: 72059)
-SystemConfig_Initialize_Test:test_initialize_startBlockOverride_succeeds() (gas: 65240)
+SystemConfig_Initialize_Test:test_initialize_events_succeeds() (gas: 72060)
+SystemConfig_Initialize_Test:test_initialize_startBlockOverride_succeeds() (gas: 65242)
 SystemConfig_Initialize_Test:test_initialize_values_succeeds() (gas: 64946)
-SystemConfig_Initialize_TestFail:test_initialize_lowGasLimit_reverts() (gas: 55653)
-SystemConfig_Initialize_TestFail:test_initialize_startBlock_reverts() (gas: 78350)
+SystemConfig_Initialize_TestFail:test_initialize_lowGasLimit_reverts() (gas: 55655)
+SystemConfig_Initialize_TestFail:test_initialize_startBlock_reverts() (gas: 78352)
 SystemConfig_Setters_TestFail:test_setBatcherHash_notOwner_reverts() (gas: 15607)
 SystemConfig_Setters_TestFail:test_setGasConfig_notOwner_reverts() (gas: 15577)
 SystemConfig_Setters_TestFail:test_setGasLimit_notOwner_reverts() (gas: 15676)

packages/contracts-bedrock/src/legacy/L1ChugSplashProxy.sol

 // SPDX-License-Identifier: MIT
 pragma solidity 0.8.15;
 
+import { Constants } from "../libraries/Constants.sol";
+
 /// @title IL1ChugSplashDeployer
 interface IL1ChugSplashDeployer {
     function isUpgrading() external view returns (bool);
@@ -21,12 +23,6 @@ contract L1ChugSplashProxy {
     ///         contract, the appended bytecode will be deployed as given.
     bytes13 internal constant DEPLOY_CODE_PREFIX = 0x600D380380600D6000396000f3;
 
-    /// @notice bytes32(uint256(keccak256('eip1967.proxy.implementation')) - 1)
-    bytes32 internal constant IMPLEMENTATION_KEY = 0x360894a13ba1a3210667c828492db98dca3e2076cc3735a920a3ca505d382bbc;
-
-    /// @notice bytes32(uint256(keccak256('eip1967.proxy.admin')) - 1)
-    bytes32 internal constant OWNER_KEY = 0xb53127684a568b3173ae13b9f8a6016e243e63b6e8ee1178d6a717850b5d6103;
-
     /// @notice Blocks a function from being called when the parent signals that the system should
     ///         be paused via an isUpgrading function.
     modifier onlyWhenNotPaused() {
@@ -160,16 +156,18 @@ contract L1ChugSplashProxy {
     /// @notice Sets the implementation address.
     /// @param _implementation New implementation address.
     function _setImplementation(address _implementation) internal {
+        bytes32 proxyImplementation = Constants.PROXY_IMPLEMENTATION_ADDRESS;
         assembly {
-            sstore(IMPLEMENTATION_KEY, _implementation)
+            sstore(proxyImplementation, _implementation)
         }
     }
 
     /// @notice Changes the owner of the proxy contract.
     /// @param _owner New owner of the proxy contract.
     function _setOwner(address _owner) internal {
+        bytes32 proxyOwner = Constants.PROXY_OWNER_ADDRESS;
         assembly {
-            sstore(OWNER_KEY, _owner)
+            sstore(proxyOwner, _owner)
         }
     }
 
@@ -203,8 +201,9 @@ contract L1ChugSplashProxy {
     /// @return Implementation address.
     function _getImplementation() internal view returns (address) {
         address implementation;
+        bytes32 proxyImplementation = Constants.PROXY_IMPLEMENTATION_ADDRESS;
         assembly {
-            implementation := sload(IMPLEMENTATION_KEY)
+            implementation := sload(proxyImplementation)
         }
         return implementation;
     }
@@ -213,8 +212,9 @@ contract L1ChugSplashProxy {
     /// @return Owner address.
     function _getOwner() internal view returns (address) {
         address owner;
+        bytes32 proxyOwner = Constants.PROXY_OWNER_ADDRESS;
         assembly {
-            owner := sload(OWNER_KEY)
+            owner := sload(proxyOwner)
         }
         return owner;
     }

packages/contracts-bedrock/src/libraries/Constants.sol

@@ -21,6 +21,15 @@ library Constants {
     ///         non-zero to reduce the gas cost of message passing transactions.
     address internal constant DEFAULT_L2_SENDER = 0x000000000000000000000000000000000000dEaD;
 
+    /// @notice The storage slot that holds the address of a proxy implementation.
+    /// @dev `bytes32(uint256(keccak256('eip1967.proxy.implementation')) - 1)`
+    bytes32 internal constant PROXY_IMPLEMENTATION_ADDRESS =
+        0x360894a13ba1a3210667c828492db98dca3e2076cc3735a920a3ca505d382bbc;
+
+    /// @notice The storage slot that holds the address of the owner.
+    /// @dev `bytes32(uint256(keccak256('eip1967.proxy.admin')) - 1)`
+    bytes32 internal constant PROXY_OWNER_ADDRESS = 0xb53127684a568b3173ae13b9f8a6016e243e63b6e8ee1178d6a717850b5d6103;
+
     /// @notice Returns the default values for the ResourceConfig. These are the recommended values
     ///         for a production network.
     function DEFAULT_RESOURCE_CONFIG() internal pure returns (ResourceMetering.ResourceConfig memory) {

packages/contracts-bedrock/src/universal/Proxy.sol

 // SPDX-License-Identifier: MIT
 pragma solidity 0.8.15;
 
+import { Constants } from "../libraries/Constants.sol";
+
 /// @title Proxy
 /// @notice Proxy is a transparent proxy that passes through the call if the caller is the owner or
 ///         if the caller is address(0), meaning that the call originated from an off-chain
 ///         simulation.
 contract Proxy {
-    /// @notice The storage slot that holds the address of the implementation.
-    ///         bytes32(uint256(keccak256('eip1967.proxy.implementation')) - 1)
-    bytes32 internal constant IMPLEMENTATION_KEY = 0x360894a13ba1a3210667c828492db98dca3e2076cc3735a920a3ca505d382bbc;
-
-    /// @notice The storage slot that holds the address of the owner.
-    ///         bytes32(uint256(keccak256('eip1967.proxy.admin')) - 1)
-    bytes32 internal constant OWNER_KEY = 0xb53127684a568b3173ae13b9f8a6016e243e63b6e8ee1178d6a717850b5d6103;
-
     /// @notice An event that is emitted each time the implementation is changed. This event is part
     ///         of the EIP-1967 specification.
     /// @param implementation The address of the implementation contract
@@ -107,8 +101,9 @@ contract Proxy {
     /// @notice Sets the implementation address.
     /// @param _implementation New implementation address.
     function _setImplementation(address _implementation) internal {
+        bytes32 proxyImplementation = Constants.PROXY_IMPLEMENTATION_ADDRESS;
         assembly {
-            sstore(IMPLEMENTATION_KEY, _implementation)
+            sstore(proxyImplementation, _implementation)
         }
         emit Upgraded(_implementation);
     }
@@ -117,8 +112,9 @@ contract Proxy {
     /// @param _admin New owner of the proxy contract.
     function _changeAdmin(address _admin) internal {
         address previous = _getAdmin();
+        bytes32 proxyOwner = Constants.PROXY_OWNER_ADDRESS;
         assembly {
-            sstore(OWNER_KEY, _admin)
+            sstore(proxyOwner, _admin)
         }
         emit AdminChanged(previous, _admin);
     }
@@ -152,8 +148,9 @@ contract Proxy {
     /// @return Implementation address.
     function _getImplementation() internal view returns (address) {
         address impl;
+        bytes32 proxyImplementation = Constants.PROXY_IMPLEMENTATION_ADDRESS;
         assembly {
-            impl := sload(IMPLEMENTATION_KEY)
+            impl := sload(proxyImplementation)
         }
         return impl;
     }
@@ -162,8 +159,9 @@ contract Proxy {
     /// @return Owner address.
     function _getAdmin() internal view returns (address) {
         address owner;
+        bytes32 proxyOwner = Constants.PROXY_OWNER_ADDRESS;
         assembly {
-            owner := sload(OWNER_KEY)
+            owner := sload(proxyOwner)
         }
         return owner;
     }

packages/contracts-bedrock/src/universal/ProxyAdmin.sol

@@ -5,6 +5,7 @@ import { Ownable } from "@openzeppelin/contracts/access/Ownable.sol";
 import { Proxy } from "./Proxy.sol";
 import { AddressManager } from "../legacy/AddressManager.sol";
 import { L1ChugSplashProxy } from "../legacy/L1ChugSplashProxy.sol";
+import { Constants } from "../libraries/Constants.sol";
 
 /// @title IStaticERC1967Proxy
 /// @notice IStaticERC1967Proxy is a static version of the ERC1967 proxy interface.
@@ -163,9 +164,7 @@ contract ProxyAdmin is Ownable {
             Proxy(_proxy).upgradeTo(_implementation);
         } else if (ptype == ProxyType.CHUGSPLASH) {
             L1ChugSplashProxy(_proxy).setStorage(
-                // bytes32(uint256(keccak256('eip1967.proxy.implementation')) - 1)
-                0x360894a13ba1a3210667c828492db98dca3e2076cc3735a920a3ca505d382bbc,
-                bytes32(uint256(uint160(_implementation)))
+                Constants.PROXY_IMPLEMENTATION_ADDRESS, bytes32(uint256(uint160(_implementation)))
             );
         } else if (ptype == ProxyType.RESOLVED) {
             string memory name = implementationName[_proxy];

packages/contracts-bedrock/test/Constants.t.sol

+// SPDX-License-Identifier: MIT
+pragma solidity 0.8.15;
+
+import { Test } from "forge-std/Test.sol";
+import { Constants } from "src/libraries/Constants.sol";
+
+contract Constants_Test is Test {
+    /// @notice Check EIP1967 related constants.
+    function test_eip1967Constants_succeeds() external {
+        assertEq(
+            bytes32(uint256(keccak256("eip1967.proxy.implementation")) - 1), Constants.PROXY_IMPLEMENTATION_ADDRESS
+        );
+        assertEq(bytes32(uint256(keccak256("eip1967.proxy.admin")) - 1), Constants.PROXY_OWNER_ADDRESS);
+    }
+}