Various fixes based on audit feedback

packages/contracts/bin/take-dump.ts

@@ -5,7 +5,6 @@ import * as mkdirp from 'mkdirp'
 
 /* Internal Imports */
 import { makeStateDump } from '../src'
-
 ;(async () => {
   const outdir = path.resolve(__dirname, '../build/dumps')
   const outfile = path.join(outdir, 'state-dump.latest.json')

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

@@ -4,11 +4,11 @@ pragma experimental ABIEncoderV2;
 
 /* Interface Imports */
 import { iOVM_ECDSAContractAccount } from "../../iOVM/accounts/iOVM_ECDSAContractAccount.sol";
-import { iOVM_ExecutionManager } from "../../iOVM/execution/iOVM_ExecutionManager.sol";
 
 /* Library Imports */
 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_ECDSAContractAccount
@@ -43,7 +43,7 @@ contract OVM_ECDSAContractAccount is iOVM_ECDSAContractAccount {
             bytes memory _returndata
         )
     {
-        iOVM_ExecutionManager ovmExecutionManager = iOVM_ExecutionManager(msg.sender);
+        address ovmExecutionManager = msg.sender;
 
         // Address of this contract within the ovm (ovmADDRESS) should be the same as the
         // recovered address of the user who signed this message. This is how we manage to shim
@@ -55,8 +55,8 @@ contract OVM_ECDSAContractAccount is iOVM_ECDSAContractAccount {
                 _v,
                 _r,
                 _s,
-                ovmExecutionManager.ovmCHAINID()
-            ) == ovmExecutionManager.ovmADDRESS(),
+                Lib_SafeExecutionManagerWrapper.safeCHAINID(ovmExecutionManager)
+            ) == Lib_SafeExecutionManagerWrapper.safeADDRESS(ovmExecutionManager),
             "Signature provided for EOA transaction execution is invalid."
         );
 
@@ -64,14 +64,15 @@ contract OVM_ECDSAContractAccount is iOVM_ECDSAContractAccount {
 
         // Need to make sure that the transaction nonce is right and bump it if so.
         require(
-            decodedTx.nonce == ovmExecutionManager.ovmGETNONCE() + 1,
+            decodedTx.nonce == Lib_SafeExecutionManagerWrapper.safeGETNONCE(ovmExecutionManager) + 1,
             "Transaction nonce does not match the expected nonce."
         );
-        ovmExecutionManager.ovmSETNONCE(decodedTx.nonce);
 
         // Contract creations are signalled by sending a transaction to the zero address.
         if (decodedTx.target == address(0)) {
-            address created = ovmExecutionManager.ovmCREATE{gas: decodedTx.gasLimit}(
+            address created = Lib_SafeExecutionManagerWrapper.safeCREATE(
+                ovmExecutionManager,
+                decodedTx.gasLimit,
                 decodedTx.data
             );
 
@@ -79,7 +80,13 @@ contract OVM_ECDSAContractAccount is iOVM_ECDSAContractAccount {
             // initialization. Always return `true` for our success value here.
             return (true, abi.encode(created));
         } else {
-            return ovmExecutionManager.ovmCALL(
+            // We only want to bump the nonce for `ovmCALL` because `ovmCREATE` automatically bumps
+            // the nonce of the calling account. Normally an EOA would bump the nonce for both
+            // cases, but since this is a contract we'd end up bumping the nonce twice.
+            Lib_SafeExecutionManagerWrapper.safeSETNONCE(ovmExecutionManager, decodedTx.nonce);
+
+            return Lib_SafeExecutionManagerWrapper.safeCALL(
+                ovmExecutionManager,
                 decodedTx.gasLimit,
                 decodedTx.target,
                 decodedTx.data

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

@@ -63,11 +63,15 @@ contract OVM_ExecutionManager is iOVM_ExecutionManager, Lib_AddressResolver {
      * @param _libAddressManager Address of the Address Manager.
      */
     constructor(
-        address _libAddressManager
+        address _libAddressManager,
+        GasMeterConfig memory _gasMeterConfig,
+        GlobalContext memory _globalContext
     )
         Lib_AddressResolver(_libAddressManager)
     {
         ovmSafetyChecker = iOVM_SafetyChecker(resolve("OVM_SafetyChecker"));
+        gasMeterConfig = _gasMeterConfig;
+        globalContext = _globalContext;
     }
 
     
@@ -818,7 +822,7 @@ contract OVM_ExecutionManager is iOVM_ExecutionManager, Lib_AddressResolver {
         )
     {
         // We always update the nonce of the creating account, even if the creation fails.
-        _setAccountNonce(ovmADDRESS(), 1);
+        _setAccountNonce(ovmADDRESS(), _getAccountNonce(ovmADDRESS()) + 1);
 
         // We're stepping into a CREATE or CREATE2, so we need to update ADDRESS to point
         // to the contract's associated address and CALLER to point to the previous ADDRESS.
@@ -1544,7 +1548,7 @@ contract OVM_ExecutionManager is iOVM_ExecutionManager, Lib_AddressResolver {
                 _getGasMetadata(cumulativeGasKey)
                 - _getGasMetadata(prevEpochGasKey)
                 + _gasLimit
-            ) > gasMeterConfig.maxGasPerQueuePerEpoch
+            ) < gasMeterConfig.maxGasPerQueuePerEpoch
         );
     }
 
@@ -1666,6 +1670,8 @@ contract OVM_ExecutionManager is iOVM_ExecutionManager, Lib_AddressResolver {
         transactionContext.ovmL1QUEUEORIGIN = _transaction.l1QueueOrigin;
         transactionContext.ovmL1TXORIGIN = _transaction.l1Txorigin;
         transactionContext.ovmGASLIMIT = gasMeterConfig.maxGasPerQueuePerEpoch;
+
+        messageRecord.nuisanceGasLeft = _getNuisanceGasLimit(_transaction.gasLimit);
     }
 
     /**

packages/contracts/contracts/optimistic-ethereum/OVM/verification/OVM_StateTransitioner.sol

@@ -262,16 +262,27 @@ contract OVM_StateTransitioner is iOVM_StateTransitioner, Lib_AddressResolver {
             "Contract must be verified before proving a storage slot."
         );
 
-        require(
-            Lib_SecureMerkleTrie.verifyInclusionProof(
+        (
+            bool exists,
+            bytes memory value
+        ) = Lib_SecureMerkleTrie.get(
             abi.encodePacked(_key),
-                abi.encodePacked(_value),
             _storageTrieWitness,
             ovmStateManager.getAccountStorageRoot(_ovmContractAddress)
-            ),
-            "Storage slot is invalid or invalid inclusion proof provided."
         );
 
+        if (exists == true) {
+            require(
+                keccak256(value) == keccak256(abi.encodePacked(_value)),
+                "Provided storage slot value is invalid."
+            );
+        } else {
+            require(
+                _value == bytes32(0),
+                "Provided storage slot value is invalid."
+            );
+        }
+
         ovmStateManager.putContractStorage(
             _ovmContractAddress,
             _key,

packages/contracts/contracts/optimistic-ethereum/libraries/codec/Lib_OVMCodec.sol

@@ -207,8 +207,8 @@ library Lib_OVMCodec {
         // index-by-index circumvents this issue.
         raw[0] = Lib_RLPWriter.writeUint(_account.nonce);
         raw[1] = Lib_RLPWriter.writeUint(_account.balance);
-        raw[2] = _account.storageRoot == 0 ? RLP_NULL_BYTES : Lib_RLPWriter.writeBytes(abi.encodePacked(_account.storageRoot));
-        raw[3] = _account.codeHash == 0 ? RLP_NULL_BYTES : Lib_RLPWriter.writeBytes(abi.encodePacked(_account.codeHash));
+        raw[2] = Lib_RLPWriter.writeBytes(abi.encodePacked(_account.storageRoot));
+        raw[3] = Lib_RLPWriter.writeBytes(abi.encodePacked(_account.codeHash));
 
         return Lib_RLPWriter.writeList(raw);
     }

packages/contracts/contracts/optimistic-ethereum/libraries/rlp/Lib_RLPReader.sol

@@ -389,6 +389,10 @@ library Lib_RLPReader {
             address
         )
     {
+        if (_in.length == 1) {
+            return address(0);
+        }
+
         require(
             _in.length == 21,
             "Invalid RLP address value."

packages/contracts/contracts/optimistic-ethereum/libraries/trie/Lib_MerkleTrie.sol

@@ -6,8 +6,6 @@ import { Lib_BytesUtils } from "../utils/Lib_BytesUtils.sol";
 import { Lib_RLPReader } from "../rlp/Lib_RLPReader.sol";
 import { Lib_RLPWriter } from "../rlp/Lib_RLPWriter.sol";
 
-import { console } from "@nomiclabs/buidler/console.sol";
-
 /**
  * @title Lib_MerkleTrie
  */

packages/contracts/contracts/optimistic-ethereum/libraries/wrappers/Lib_SafeExecutionManagerWrapper.sol

+// SPDX-License-Identifier: UNLICENSED
+pragma solidity ^0.7.0;
+
+/**
+ * @title Lib_SafeExecutionManagerWrapper
+ */
+library Lib_SafeExecutionManagerWrapper {
+
+    /**********************
+     * Internal Functions *
+     **********************/
+
+    /**
+     * Makes an ovmCALL and performs all the necessary safety checks.
+     * @param _ovmExecutionManager Address of the OVM_ExecutionManager.
+     * @param _gasLimit Gas limit for the call.
+     * @param _target Address to call.
+     * @param _calldata Data to send to the call.
+     * @return _success Whether or not the call reverted.
+     * @return _returndata Data returned by the call.
+     */
+    function safeCALL(
+        address _ovmExecutionManager,
+        uint256 _gasLimit,
+        address _target,
+        bytes memory _calldata
+    )
+        internal
+        returns (
+            bool _success,
+            bytes memory _returndata
+        )
+    {
+        bytes memory returndata = _safeExecutionManagerInteraction(
+            _ovmExecutionManager,
+            abi.encodeWithSignature(
+                "ovmCALL(uint256,address,bytes)",
+                _gasLimit,
+                _target,
+                _calldata
+            )
+        );
+
+        return abi.decode(returndata, (bool, bytes));
+    }
+
+    /**
+     * Performs an ovmCREATE and the necessary safety checks.
+     * @param _ovmExecutionManager Address of the OVM_ExecutionManager.
+     * @param _gasLimit Gas limit for the creation.
+     * @param _bytecode Code for the new contract.
+     * @return _contract Address of the created contract.
+     */
+    function safeCREATE(
+        address _ovmExecutionManager,
+        uint256 _gasLimit,
+        bytes memory _bytecode
+    )
+        internal
+        returns (
+            address _contract
+        )
+    {
+        bytes memory returndata = _safeExecutionManagerInteraction(
+            _ovmExecutionManager,
+            _gasLimit,
+            abi.encodeWithSignature(
+                "ovmCREATE(bytes)",
+                _bytecode
+            )
+        );
+
+        return abi.decode(returndata, (address));
+    }
+
+    /**
+     * Performs a safe ovmCHAINID call.
+     * @param _ovmExecutionManager Address of the OVM_ExecutionManager.
+     * @return _CHAINID Result of calling ovmCHAINID.
+     */
+    function safeCHAINID(
+        address _ovmExecutionManager
+    )
+        internal
+        returns (
+            uint256 _CHAINID
+        )
+    {
+        bytes memory returndata = _safeExecutionManagerInteraction(
+            _ovmExecutionManager,
+            abi.encodeWithSignature(
+                "ovmCHAINID()"
+            )
+        );
+
+        return abi.decode(returndata, (uint256));
+    }
+
+    /**
+     * Performs a safe ovmADDRESS call.
+     * @param _ovmExecutionManager Address of the OVM_ExecutionManager.
+     * @return _ADDRESS Result of calling ovmADDRESS.
+     */
+    function safeADDRESS(
+        address _ovmExecutionManager
+    )
+        internal
+        returns (
+            address _ADDRESS
+        )
+    {
+        bytes memory returndata = _safeExecutionManagerInteraction(
+            _ovmExecutionManager,
+            abi.encodeWithSignature(
+                "ovmADDRESS()"
+            )
+        );
+
+        return abi.decode(returndata, (address));
+    }
+
+    /**
+     * Performs a safe ovmGETNONCE call.
+     * @param _ovmExecutionManager Address of the OVM_ExecutionManager.
+     * @return _nonce Result of calling ovmGETNONCE.
+     */
+    function safeGETNONCE(
+        address _ovmExecutionManager
+    )
+        internal
+        returns (
+            uint256 _nonce
+        )
+    {
+        bytes memory returndata = _safeExecutionManagerInteraction(
+            _ovmExecutionManager,
+            abi.encodeWithSignature(
+                "ovmGETNONCE()"
+            )
+        );
+
+        return abi.decode(returndata, (uint256));
+    }
+
+    /**
+     * Performs a safe ovmSETNONCE call.
+     * @param _ovmExecutionManager Address of the OVM_ExecutionManager.
+     * @param _nonce New account nonce.
+     */
+    function safeSETNONCE(
+        address _ovmExecutionManager,
+        uint256 _nonce
+    )
+        internal
+    {
+        _safeExecutionManagerInteraction(
+            _ovmExecutionManager,
+            abi.encodeWithSignature(
+                "ovmSETNONCE(uint256)",
+                _nonce
+            )
+        );
+    }
+
+
+    /*********************
+     * Private Functions *
+     *********************/
+
+    /**
+     * Performs an ovm interaction and the necessary safety checks.
+     * @param _ovmExecutionManager Address of the OVM_ExecutionManager.
+     * @param _gasLimit Gas limit for the interaction.
+     * @param _calldata Data to send to the OVM_ExecutionManager (encoded with sighash).
+     * @return _returndata Data sent back by the OVM_ExecutionManager.
+     */
+    function _safeExecutionManagerInteraction(
+        address _ovmExecutionManager,
+        uint256 _gasLimit,
+        bytes memory _calldata
+    )
+        private
+        returns (
+            bytes memory _returndata
+        )
+    {
+        (
+            bool success,
+            bytes memory returndata
+        ) = _ovmExecutionManager.call{gas: _gasLimit}(_calldata);
+
+        if (success == false) {
+            assembly {
+                revert(add(returndata, 0x20), mload(returndata))
+            }
+        } else if (returndata.length == 1) {
+            assembly {
+                return(0, 1)
+            }
+        } else {
+            return returndata;
+        }
+    }
+
+    function _safeExecutionManagerInteraction(
+        address _ovmExecutionManager,
+        bytes memory _calldata
+    )
+        private
+        returns (
+            bytes memory _returndata
+        )
+    {
+        return _safeExecutionManagerInteraction(
+            _ovmExecutionManager,
+            gasleft(),
+            _calldata
+        );
+    }
+}

packages/contracts/contracts/optimistic-ethereum/mockOVM/accounts/mockOVM_ECDSAContractAccount.sol

@@ -4,11 +4,11 @@ pragma experimental ABIEncoderV2;
 
 /* Interface Imports */
 import { iOVM_ECDSAContractAccount } from "../../iOVM/accounts/iOVM_ECDSAContractAccount.sol";
-import { iOVM_ExecutionManager } from "../../iOVM/execution/iOVM_ExecutionManager.sol";
 
 /* Library Imports */
 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 mockOVM_ECDSAContractAccount
@@ -43,22 +43,16 @@ contract mockOVM_ECDSAContractAccount is iOVM_ECDSAContractAccount {
             bytes memory _returndata
         )
     {
-        iOVM_ExecutionManager ovmExecutionManager = iOVM_ExecutionManager(msg.sender);
-
-        // Skip signature validation within the mock.
+        address ovmExecutionManager = msg.sender;
 
+        // Skip signature validation in this mock.
         Lib_OVMCodec.EOATransaction memory decodedTx = Lib_OVMCodec.decodeEOATransaction(_transaction);
 
-        // Need to make sure that the transaction nonce is right and bump it if so.
-        require(
-            decodedTx.nonce == ovmExecutionManager.ovmGETNONCE() + 1,
-            "Transaction nonce does not match the expected nonce."
-        );
-        ovmExecutionManager.ovmSETNONCE(decodedTx.nonce);
-
         // Contract creations are signalled by sending a transaction to the zero address.
         if (decodedTx.target == address(0)) {
-            address created = ovmExecutionManager.ovmCREATE{gas: decodedTx.gasLimit}(
+            address created = Lib_SafeExecutionManagerWrapper.safeCREATE(
+                ovmExecutionManager,
+                decodedTx.gasLimit,
                 decodedTx.data
             );
 
@@ -66,7 +60,8 @@ contract mockOVM_ECDSAContractAccount is iOVM_ECDSAContractAccount {
             // initialization. Always return `true` for our success value here.
             return (true, abi.encode(created));
         } else {
-            return ovmExecutionManager.ovmCALL(
+            return Lib_SafeExecutionManagerWrapper.safeCALL(
+                ovmExecutionManager,
                 decodedTx.gasLimit,
                 decodedTx.target,
                 decodedTx.data

packages/contracts/package.json

@@ -10,7 +10,7 @@
   ],
   "license": "MIT",
   "scripts": {
-    "build": "yarn run build:contracts && yarn run build:typescript && yarn run build:copy",
+    "build": "yarn run build:contracts && yarn run build:typescript && yarn run build:copy && yarn run build:dump",
     "build:typescript": "tsc -p .",
     "build:contracts": "buidler compile",
     "build:dump": "ts-node \"bin/take-dump.ts\"",
@@ -42,6 +42,7 @@
     "ganache-core": "^2.12.1",
     "lodash": "^4.17.20",
     "merkle-patricia-tree": "git+https://github.com/kfichter/merkle-patricia-tree",
+    "mkdirp": "^1.0.4",
     "mocha": "^8.1.1",
     "prettier": "^2.1.2",
     "random-bytes-seed": "^1.0.3",

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

@@ -12,6 +12,9 @@ export interface RollupDeployConfig {
     maxGasPerQueuePerEpoch: number
     secondsPerEpoch: number
   }
+  ovmGlobalContext: {
+    ovmCHAINID: number
+  }
   transactionChainConfig: {
     sequencer: string | Signer
     forceInclusionPeriodSeconds: number
@@ -83,7 +86,11 @@ export const makeContractDeployConfig = async (
     },
     OVM_ExecutionManager: {
       factory: getContractFactory('OVM_ExecutionManager'),
-      params: [AddressManager.address],
+      params: [
+        AddressManager.address,
+        config.ovmGasMeteringConfig,
+        config.ovmGlobalContext
+      ],
     },
     OVM_StateManager: {
       factory: getContractFactory('OVM_StateManager'),
@@ -108,5 +115,11 @@ export const makeContractDeployConfig = async (
     OVM_StateTransitionerFactory: {
       factory: getContractFactory('OVM_StateTransitionerFactory'),
     },
+    OVM_ECDSAContractAccount: {
+      factory: getContractFactory('OVM_ECDSAContractAccount')
+    },
+    mockOVM_ECDSAContractAccount: {
+      factory: getContractFactory('mockOVM_ECDSAContractAccount')
+    }
   }
 }

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

@@ -45,10 +45,12 @@ export const deploy = async (
     const SimpleProxy = await Factory__SimpleProxy.deploy()
     await AddressManager.setAddress(name, SimpleProxy.address)
 
+    contracts[`Proxy__${name}`] = SimpleProxy
+
     try {
       contracts[name] = await contractDeployParameters.factory
         .connect(config.deploymentSigner)
-        .deploy(...contractDeployParameters.params)
+        .deploy(...(contractDeployParameters.params || []))
       await SimpleProxy.setTarget(contracts[name].address)
     } catch (err) {
       failedDeployments.push(name)

packages/contracts/src/contract-dumps.ts

@@ -7,6 +7,7 @@ import { keccak256 } from 'ethers/lib/utils'
 /* Internal Imports */
 import { deploy, RollupDeployConfig } from './contract-deployment'
 import { fromHexString, toHexString, remove0x } from '../test/helpers/utils'
+import { getContractDefinition } from './contract-defs'
 
 interface StorageDump {
   [key: string]: string
@@ -114,6 +115,9 @@ export const makeStateDump = async (): Promise<any> => {
       maxGasPerQueuePerEpoch: 1_000_000_000_000,
       secondsPerEpoch: 600,
     },
+    ovmGlobalContext: {
+      ovmCHAINID: 420
+    },
     transactionChainConfig: {
       sequencer: signer,
       forceInclusionPeriodSeconds: 600,
@@ -131,19 +135,23 @@ export const makeStateDump = async (): Promise<any> => {
       'OVM_SafetyChecker',
       'OVM_ExecutionManager',
       'OVM_StateManager',
-      'OVM_ECDSAContractAccount'
+      'mockOVM_ECDSAContractAccount'
     ]
   }
 
   const precompiles = {
-    OVM_L2ToL1MessagePasser: '4200000000000000000000000000000000000000',
-    OVM_L1MessageSender: '4200000000000000000000000000000000000001',
-    OVM_DeployerWhitelist: '4200000000000000000000000000000000000002'
+    OVM_L2ToL1MessagePasser: '0x4200000000000000000000000000000000000000',
+    OVM_L1MessageSender: '0x4200000000000000000000000000000000000001',
+    OVM_DeployerWhitelist: '0x4200000000000000000000000000000000000002'
   }
 
   const deploymentResult = await deploy(config)
   deploymentResult.contracts['Lib_AddressManager'] = deploymentResult.AddressManager
 
+  if (deploymentResult.failedDeployments.length > 0) {
+    throw new Error(`Could not generate state dump, deploy failed for: ${deploymentResult.failedDeployments}`)
+  }
+
   const pStateManager = ganache.engine.manager.state.blockchain.vm.pStateManager
   const cStateManager = pStateManager._wrapped
 
@@ -158,14 +166,14 @@ export const makeStateDump = async (): Promise<any> => {
     const codeBuf = await pStateManager.getContractCode(fromHexString(contract.address))
     const code = toHexString(codeBuf)
 
-    const deadAddress = precompiles[name] || `deaddeaddeaddeaddeaddeaddeaddeaddead${i.toString(16).padStart(4, '0')}`
+    const deadAddress = precompiles[name] || `0xdeaddeaddeaddeaddeaddeaddeaddeaddead${i.toString(16).padStart(4, '0')}`
 
     dump.accounts[name] = {
       address: deadAddress,
       code,
       codeHash: keccak256(code),
       storage: await getStorageDump(cStateManager, contract.address),
-      abi: JSON.parse(contract.interface.format('json') as string),
+      abi: getContractDefinition(name.replace('Proxy__', '')).abi
     }
   }
 

packages/contracts/yarn.lock

@@ -39,10 +39,10 @@
   resolved "https://registry.yarnpkg.com/@ensdomains/resolver/-/resolver-0.2.4.tgz#c10fe28bf5efbf49bff4666d909aed0265efbc89"
   integrity sha512-bvaTH34PMCbv6anRa9I/0zjLJgY4EuznbEMgbV77JBCQ9KNC46rzi0avuxpOfu+xDjPEtSFGqVEOr5GlUSGudA==
 
-"@eth-optimism/smock@^0.0.1":
-  version "0.0.1"
-  resolved "https://registry.yarnpkg.com/@eth-optimism/smock/-/smock-0.0.1.tgz#8ea7379072eccfe5cac327e7eb78384f0e38b18c"
-  integrity sha512-lJmdXaDkAQ7Y2T9GfEzrhF6lrJ3WiEb8HJyDBjr2r3Cd4/0b2RAQj4kqkKLFZyGDMnAZ0O+XnTTyaKhBXkDSXw==
+"@eth-optimism/smock@^0.0.2":
+  version "0.0.2"
+  resolved "https://registry.yarnpkg.com/@eth-optimism/smock/-/smock-0.0.2.tgz#58b9b28885fef1b08c5b13cb31bf614635027d90"
+  integrity sha512-6Wn4h8ZuDqZlNq2lF1Mov78b41S7g4xXWXBOqqS5T+d0yC2V6Ao9XIJBheBS6l1cCN8tFNR47zdlmOCRSDX7sw==
   dependencies:
     ethereum-waffle "^3"
     ethers "^5"