contracts-bedrock: add legacy getters

packages/contracts-bedrock/.gas-snapshot

@@ -108,41 +108,42 @@ L2OutputOracleUpgradeable_Test:test_cannotInitImpl() (gas: 15171)
 L2OutputOracleUpgradeable_Test:test_cannotInitProxy() (gas: 20152)
 L2OutputOracleUpgradeable_Test:test_initValuesOnProxy() (gas: 26095)
 L2OutputOracleUpgradeable_Test:test_upgrading() (gas: 180457)
-L2StandardBridge_Test:test_cannotWithdrawEthWithoutSendingIt() (gas: 19643)
+L2StandardBridge_Test:test_cannotWithdrawEthWithoutSendingIt() (gas: 19621)
 L2StandardBridge_Test:test_finalizeBridgeETH_incorrectValueReverts() (gas: 23733)
 L2StandardBridge_Test:test_finalizeBridgeETH_sendToMessengerReverts() (gas: 23960)
 L2StandardBridge_Test:test_finalizeBridgeETH_sendToSelfReverts() (gas: 23793)
-L2StandardBridge_Test:test_finalizeDeposit() (gas: 89316)
+L2StandardBridge_Test:test_finalizeDeposit() (gas: 89363)
 L2StandardBridge_Test:test_initialize() (gas: 10536)
 L2StandardBridge_Test:test_receive() (gas: 131820)
-L2StandardBridge_Test:test_withdraw() (gas: 343912)
-L2StandardBridge_Test:test_withdrawTo() (gas: 344641)
+L2StandardBridge_Test:test_withdraw() (gas: 343951)
+L2StandardBridge_Test:test_withdrawTo() (gas: 344680)
 L2StandardBridge_Test:test_withdraw_onlyEOA() (gas: 251816)
 L2ToL1MessagePasserTest:test_burn() (gas: 112530)
 L2ToL1MessagePasserTest:test_initiateWithdrawal_fromContract() (gas: 70246)
 L2ToL1MessagePasserTest:test_initiateWithdrawal_fromEOA() (gas: 75764)
 LegacyERC20ETH_Test:test_approve() (gas: 10723)
-LegacyERC20ETH_Test:test_burn() (gas: 10592)
-LegacyERC20ETH_Test:test_crossDomain() (gas: 6306)
-LegacyERC20ETH_Test:test_decreaseAllowance() (gas: 10679)
+LegacyERC20ETH_Test:test_burn() (gas: 10615)
+LegacyERC20ETH_Test:test_crossDomain() (gas: 6339)
+LegacyERC20ETH_Test:test_decreaseAllowance() (gas: 10657)
 LegacyERC20ETH_Test:test_increaseAllowance() (gas: 10667)
-LegacyERC20ETH_Test:test_metadata() (gas: 15391)
+LegacyERC20ETH_Test:test_metadata() (gas: 15414)
 LegacyERC20ETH_Test:test_mint() (gas: 10649)
-LegacyERC20ETH_Test:test_transfer() (gas: 10733)
+LegacyERC20ETH_Test:test_transfer() (gas: 10711)
 LegacyERC20ETH_Test:test_transferFrom() (gas: 12887)
 LegacyMessagePasser_Test:test_LegacyMessagePasser_passMessageToL1_Succeeds() (gas: 34519)
-OptimismMintableERC20_Test:test_bridge() (gas: 7624)
-OptimismMintableERC20_Test:test_burn() (gas: 51012)
-OptimismMintableERC20_Test:test_burnRevertsFromNotBridge() (gas: 11141)
-OptimismMintableERC20_Test:test_erc165_supportsInterface() (gas: 7696)
+OptimismMintableERC20_Test:test_bridge() (gas: 7599)
+OptimismMintableERC20_Test:test_burn() (gas: 51031)
+OptimismMintableERC20_Test:test_burnRevertsFromNotBridge() (gas: 11164)
+OptimismMintableERC20_Test:test_erc165_supportsInterface() (gas: 7765)
 OptimismMintableERC20_Test:test_l1Token() (gas: 7622)
-OptimismMintableERC20_Test:test_l2Bridge() (gas: 7633)
+OptimismMintableERC20_Test:test_l2Bridge() (gas: 7688)
+OptimismMintableERC20_Test:test_legacy() (gas: 14300)
 OptimismMintableERC20_Test:test_mint() (gas: 63609)
 OptimismMintableERC20_Test:test_mintRevertsFromNotBridge() (gas: 11098)
-OptimismMintableERC20_Test:test_remoteToken() (gas: 7624)
+OptimismMintableERC20_Test:test_remoteToken() (gas: 7644)
 OptimismMintableTokenFactory_Test:test_bridge() (gas: 7577)
-OptimismMintableTokenFactory_Test:test_createStandardL2Token() (gas: 1083647)
-OptimismMintableTokenFactory_Test:test_createStandardL2TokenSameTwice() (gas: 2153437)
+OptimismMintableTokenFactory_Test:test_createStandardL2Token() (gas: 1095274)
+OptimismMintableTokenFactory_Test:test_createStandardL2TokenSameTwice() (gas: 2176691)
 OptimismMintableTokenFactory_Test:test_createStandardL2TokenShouldRevertIfRemoteIsZero() (gas: 9413)
 OptimismPortalUpgradeable_Test:test_initialize_cannotInitImpl_reverts() (gas: 10791)
 OptimismPortalUpgradeable_Test:test_initialize_cannotInitProxy_reverts() (gas: 15767)

packages/contracts-bedrock/contracts/test/OptimismMintableERC20.t.sol

@@ -29,6 +29,17 @@ contract OptimismMintableERC20_Test is Bridge_Initializer {
         assertEq(L2Token.l2Bridge(), address(L2Bridge));
     }
 
+    function test_legacy() external {
+        // Getters for the remote token
+        assertEq(L2Token.REMOTE_TOKEN(), address(L1Token));
+        assertEq(L2Token.remoteToken(), address(L1Token));
+        assertEq(L2Token.l1Token(), address(L1Token));
+        // Getters for the bridge
+        assertEq(L2Token.BRIDGE(), address(L2Bridge));
+        assertEq(L2Token.bridge(), address(L2Bridge));
+        assertEq(L2Token.l2Bridge(), address(L2Bridge));
+    }
+
     function test_mint() external {
         vm.expectEmit(true, true, true, true);
         emit Mint(alice, 100);

packages/contracts-bedrock/contracts/universal/OptimismMintableERC20.sol

@@ -16,12 +16,12 @@ contract OptimismMintableERC20 is IOptimismMintableERC20, ILegacyMintableERC20,
     /**
      * @notice Address of the corresponding version of this token on the remote chain.
      */
-    address immutable public remoteToken;
+    address immutable public REMOTE_TOKEN;
 
     /**
      * @notice Address of the StandardBridge on this network.
      */
-    address immutable public bridge;
+    address immutable public BRIDGE;
 
     /**
      * @notice Emitted whenever tokens are minted for an account.
@@ -43,7 +43,7 @@ contract OptimismMintableERC20 is IOptimismMintableERC20, ILegacyMintableERC20,
      * @notice A modifier that only allows the bridge to call
      */
     modifier onlyBridge() {
-        require(msg.sender == bridge, "OptimismMintableERC20: only bridge can mint and burn");
+        require(msg.sender == BRIDGE, "OptimismMintableERC20: only bridge can mint and burn");
         _;
     }
 
@@ -59,8 +59,8 @@ contract OptimismMintableERC20 is IOptimismMintableERC20, ILegacyMintableERC20,
         string memory _name,
         string memory _symbol
     ) ERC20(_name, _symbol) {
-        remoteToken = _remoteToken;
-        bridge = _bridge;
+        REMOTE_TOKEN = _remoteToken;
+        BRIDGE = _bridge;
     }
 
     /**
@@ -113,17 +113,33 @@ contract OptimismMintableERC20 is IOptimismMintableERC20, ILegacyMintableERC20,
 
     /**
      * @custom:legacy
-     * @notice Legacy getter for the remote token. Use remoteToken going forward.
+     * @notice Legacy getter for the remote token. Use REMOTE_TOKEN going forward.
      */
     function l1Token() public view returns (address) {
-        return remoteToken;
+        return REMOTE_TOKEN;
     }
 
     /**
      * @custom:legacy
-     * @notice Legacy getter for the bridge. Use bridge going forward.
+     * @notice Legacy getter for the bridge. Use BRIDGE going forward.
      */
     function l2Bridge() public view returns (address) {
-        return bridge;
+        return BRIDGE;
+    }
+
+    /**
+     * @custom:legacy
+     * @notice Legacy getter for REMOTE_TOKEN.
+     */
+    function remoteToken() public view returns (address) {
+        return REMOTE_TOKEN;
+    }
+
+    /**
+     * @custom:legacy
+     * @notice Legacy getter for BRIDGE.
+     */
+    function bridge() public view returns (address) {
+        return BRIDGE;
     }
 }