refactor[contracts]: Port OVM_ProxyEOA to use ovm-solc (#545)

* Port OVM_ProxyEOA to use ovm-solc

* Remove all constructor logic from ProxyEOA

* chore[contracts]: add changeset

.changeset/twenty-cows-walk.md

+---
+"@eth-optimism/contracts": patch
+---
+
+Ports OVM_ProxyEOA to use optimistic-solc instead of the standard solc compiler.

packages/contracts/contracts/optimistic-ethereum/OVM/accounts/OVM_ProxyEOA.sol

 // SPDX-License-Identifier: MIT
+// @unsupported: evm
 pragma solidity >0.5.0 <0.8.0;
 
 /* Library Imports */
 import { Lib_Bytes32Utils } from "../../libraries/utils/Lib_Bytes32Utils.sol";
-import { Lib_OVMCodec } from "../../libraries/codec/Lib_OVMCodec.sol";
-import { Lib_ECDSAUtils } from "../../libraries/utils/Lib_ECDSAUtils.sol";
-import { Lib_SafeExecutionManagerWrapper } from "../../libraries/wrappers/Lib_SafeExecutionManagerWrapper.sol";
 
 /**
  * @title OVM_ProxyEOA
@@ -13,7 +11,7 @@ import { Lib_SafeExecutionManagerWrapper } from "../../libraries/wrappers/Lib_Sa
  * In combination with the logic implemented in the ECDSA Contract Account, this enables a form of upgradable 
  * 'account abstraction' on layer 2. 
  * 
- * Compiler used: solc
+ * Compiler used: optimistic-solc
  * Runtime target: OVM
  */
 contract OVM_ProxyEOA {
@@ -22,24 +20,10 @@ contract OVM_ProxyEOA {
      * Constants *
      *************/
 
+    address constant DEFAULT_IMPLEMENTATION = 0x4200000000000000000000000000000000000003;
     bytes32 constant IMPLEMENTATION_KEY = 0xdeaddeaddeaddeaddeaddeaddeaddeaddeaddeaddeaddeaddeaddeaddeaddead;
 
 
-    /***************
-     * Constructor *
-     ***************/
-
-    /**
-     * @param _implementation Address of the initial implementation contract.
-     */
-    constructor(
-        address _implementation
-    )
-    {
-        _setImplementation(_implementation);
-    }
-
-
     /*********************
      * Fallback Function *
      *********************/
@@ -47,23 +31,23 @@ contract OVM_ProxyEOA {
     fallback()
         external
     {
-        (bool success, bytes memory returndata) = Lib_SafeExecutionManagerWrapper.safeDELEGATECALL(
-            gasleft(),
-            getImplementation(),
-            msg.data
-        );
+        (bool success, bytes memory returndata) = getImplementation().delegatecall(msg.data);
 
         if (success) {
             assembly {
                 return(add(returndata, 0x20), mload(returndata))
             }
         } else {
-            Lib_SafeExecutionManagerWrapper.safeREVERT(
-                string(returndata)
-            );
+            assembly {
+                revert(add(returndata, 0x20), mload(returndata))
+            }
         }
     }
 
+    // WARNING: We use the deployed bytecode of this contract as a template to create ProxyEOA
+    // contracts. As a result, we must *not* perform any constructor logic. Use initialization
+    // functions if necessary.
+
 
     /********************
      * Public Functions *
@@ -78,8 +62,8 @@ contract OVM_ProxyEOA {
     )
         external
     {
-        Lib_SafeExecutionManagerWrapper.safeREQUIRE(
-            Lib_SafeExecutionManagerWrapper.safeADDRESS() == Lib_SafeExecutionManagerWrapper.safeCALLER(),
+        require(
+            msg.sender == address(this),
             "EOAs can only upgrade their own EOA implementation"
         );
 
@@ -96,11 +80,17 @@ contract OVM_ProxyEOA {
             address
         )
     {
-        return Lib_Bytes32Utils.toAddress(
-            Lib_SafeExecutionManagerWrapper.safeSLOAD(
-                IMPLEMENTATION_KEY
-            )
-        );
+        bytes32 addr32;
+        assembly {
+            addr32 := sload(IMPLEMENTATION_KEY)
+        }
+
+        address implementation = Lib_Bytes32Utils.toAddress(addr32);
+        if (implementation == address(0)) {
+            return DEFAULT_IMPLEMENTATION;
+        } else {
+            return implementation;
+        }
     }
 
 
@@ -113,9 +103,9 @@ contract OVM_ProxyEOA {
     )
         internal
     {
-        Lib_SafeExecutionManagerWrapper.safeSSTORE(
-            IMPLEMENTATION_KEY,
-            Lib_Bytes32Utils.fromAddress(_implementation)
-        );
+        bytes32 addr32 = Lib_Bytes32Utils.fromAddress(_implementation);
+        assembly {
+            sstore(IMPLEMENTATION_KEY, addr32)
+        }
     }
 }

packages/contracts/contracts/optimistic-ethereum/OVM/execution/OVM_ExecutionManager.sol

@@ -16,7 +16,6 @@ import { iOVM_SafetyChecker } from "../../iOVM/execution/iOVM_SafetyChecker.sol"
 
 /* Contract Imports */
 import { OVM_ECDSAContractAccount } from "../accounts/OVM_ECDSAContractAccount.sol";
-import { OVM_ProxyEOA } from "../accounts/OVM_ProxyEOA.sol";
 import { OVM_DeployerWhitelist } from "../predeploys/OVM_DeployerWhitelist.sol";
 
 /**
@@ -534,9 +533,25 @@ contract OVM_ExecutionManager is iOVM_ExecutionManager, Lib_AddressResolver {
         address prevADDRESS = messageContext.ovmADDRESS;
         messageContext.ovmADDRESS = eoa;
 
-        // Now actually create the account and get its bytecode. We're not worried about reverts
-        // (other than out of gas, which we can't capture anyway) because this contract is trusted.
-        OVM_ProxyEOA proxyEOA = new OVM_ProxyEOA(0x4200000000000000000000000000000000000003);
+        // Creates a duplicate of the OVM_ProxyEOA located at 0x42....09. Uses the following
+        // "magic" prefix to deploy an exact copy of the code:
+        // PUSH1 0x0D   # size of this prefix in bytes
+        // CODESIZE
+        // SUB          # subtract prefix size from codesize 
+        // DUP1
+        // PUSH1 0x0D
+        // PUSH1 0x00
+        // CODECOPY     # copy everything after prefix into memory at pos 0
+        // PUSH1 0x00
+        // RETURN       # return the copied code
+        address proxyEOA = Lib_EthUtils.createContract(abi.encodePacked(
+            hex"600D380380600D6000396000f3",
+            ovmEXTCODECOPY(
+                0x4200000000000000000000000000000000000009,
+                0,
+                ovmEXTCODESIZE(0x4200000000000000000000000000000000000009)
+            )
+        ));
 
         // Reset the address now that we're done deploying.
         messageContext.ovmADDRESS = prevADDRESS;

packages/contracts/src/contract-deployment/config.ts

@@ -254,5 +254,8 @@ export const makeContractDeployConfig = async (
     ERC1820Registry: {
       factory: getContractFactory('ERC1820Registry'),
     },
+    OVM_ProxyEOA: {
+      factory: getContractFactory('OVM_ProxyEOA', undefined, true),
+    },
   }
 }

packages/contracts/src/contract-dumps.ts

@@ -167,6 +167,7 @@ export const makeStateDump = async (cfg: RollupDeployConfig): Promise<any> => {
     'OVM_SequencerEntrypoint',
     'Lib_AddressManager',
     'OVM_ETH',
+    'OVM_ProxyEOA',
   ]
 
   const deploymentResult = await deploy(config)

packages/contracts/src/predeploys.ts

@@ -8,5 +8,6 @@ export const predeploys = {
   OVM_ETH: '0x4200000000000000000000000000000000000006',
   OVM_L2CrossDomainMessenger: '0x4200000000000000000000000000000000000007',
   Lib_AddressManager: '0x4200000000000000000000000000000000000008',
+  OVM_ProxyEOA: '0x4200000000000000000000000000000000000009',
   ERC1820Registry: '0x1820a4B7618BdE71Dce8cdc73aAB6C95905faD24',
 }

packages/contracts/test/contracts/OVM/accounts/OVM_ProxyEOA.spec.ts

@@ -8,6 +8,7 @@ import { remove0x } from '@eth-optimism/core-utils'
 
 /* Internal Imports */
 import { decodeSolidityError } from '../../../helpers'
+import { getContractFactory } from '../../../../src'
 
 const callPredeploy = async (
   Helper_PredeployCaller: Contract,
@@ -60,12 +61,12 @@ describe('OVM_ProxyEOA', () => {
 
   let OVM_ProxyEOAFactory: ContractFactory
   before(async () => {
-    OVM_ProxyEOAFactory = await ethers.getContractFactory('OVM_ProxyEOA')
+    OVM_ProxyEOAFactory = getContractFactory('OVM_ProxyEOA', wallet, true)
   })
 
   let OVM_ProxyEOA: Contract
   beforeEach(async () => {
-    OVM_ProxyEOA = await OVM_ProxyEOAFactory.deploy(eoaDefaultAddr)
+    OVM_ProxyEOA = await OVM_ProxyEOAFactory.deploy()
 
     Mock__OVM_ExecutionManager.smocked.ovmADDRESS.will.return.with(
       OVM_ProxyEOA.address

packages/contracts/test/contracts/OVM/execution/OVM_ExecutionManager/ovmCREATEEOA.spec.ts

@@ -73,7 +73,7 @@ const test_ovmCREATEEOA: TestDefinition = {
           },
           expectedReturnStatus: true,
           expectedReturnValue: fromHexString(
-            getContractDefinition('OVM_ProxyEOA').deployedBytecode
+            getContractDefinition('OVM_ProxyEOA', true).deployedBytecode
           ).length,
         },
       ],

packages/contracts/test/helpers/test-runner/test-runner.ts

@@ -37,6 +37,7 @@ import {
 } from '../constants'
 import { getStorageXOR } from '../'
 import { UNSAFE_BYTECODE } from '../dummy'
+import { getContractFactory } from '../../../src'
 
 export class ExecutionManagerTestRunner {
   private snapshot: string
@@ -47,6 +48,7 @@ export class ExecutionManagerTestRunner {
     Helper_TestRunner: Contract
     Factory__Helper_TestRunner_CREATE: ContractFactory
     OVM_DeployerWhitelist: Contract
+    OVM_ProxyEOA: Contract
   } = {
     OVM_SafetyChecker: undefined,
     OVM_StateManager: undefined,
@@ -54,6 +56,7 @@ export class ExecutionManagerTestRunner {
     Helper_TestRunner: undefined,
     Factory__Helper_TestRunner_CREATE: undefined,
     OVM_DeployerWhitelist: undefined,
+    OVM_ProxyEOA: undefined,
   }
 
   // Default pre-state with contract deployer whitelist NOT initialized.
@@ -65,6 +68,10 @@ export class ExecutionManagerTestRunner {
           codeHash: NON_NULL_BYTES32,
           ethAddress: '$OVM_DEPLOYER_WHITELIST',
         },
+        ['0x4200000000000000000000000000000000000009']: {
+          codeHash: NON_NULL_BYTES32,
+          ethAddress: '$OVM_PROXY_EOA',
+        },
       },
       contractStorage: {
         ['0x4200000000000000000000000000000000000002']: {
@@ -217,6 +224,12 @@ export class ExecutionManagerTestRunner {
 
     this.contracts.OVM_DeployerWhitelist = DeployerWhitelist
 
+    this.contracts.OVM_ProxyEOA = await getContractFactory(
+      'OVM_ProxyEOA',
+      AddressManager.signer,
+      true
+    ).deploy()
+
     this.contracts.OVM_ExecutionManager = await (
       await smoddit('OVM_ExecutionManager')
     ).deploy(
@@ -266,6 +279,8 @@ export class ExecutionManagerTestRunner {
         return this.contracts.Helper_TestRunner.address
       } else if (kv === '$OVM_DEPLOYER_WHITELIST') {
         return this.contracts.OVM_DeployerWhitelist.address
+      } else if (kv === '$OVM_PROXY_EOA') {
+        return this.contracts.OVM_ProxyEOA.address
       } else if (kv.startsWith('$DUMMY_OVM_ADDRESS_')) {
         return ExecutionManagerTestRunner.getDummyAddress(kv)
       } else {