Added Call.t.sol

.circleci/config.yml

@@ -10,6 +10,7 @@ jobs:
         working_directory: ~/repo
         steps:
             - checkout
+            - run: git submodule update --init --recursive
             - run: echo 'export PATH=$HOME/CIRCLE_PROJECT_REPONAME/node_modules/.bin:$PATH' >> $BASH_ENV
             - run:
                   name: install-yarn

.gitignore

@@ -173,6 +173,15 @@ contracts/zero-ex/test/generated-wrappers/
 contracts/treasury/generated-wrappers/
 contracts/treasury/test/generated-wrappers/
 
+# foundry artifacts
+contracts/zero-ex/foundry-artifacts/
+
+# foundry cache 
+contracts/zero-ex/foundry-cache/
+
+# typechain wrappers
+contracts/zero-ex/typechain-wrappers/
+
 # Doc README copy
 packages/*/docs/README.md
 

.gitmodules

@@ -0,0 +1,3 @@
+[submodule "contracts/zero-ex/contracts/deps/forge-std"]
+	path = contracts/zero-ex/contracts/deps/forge-std
+	url = https://github.com/foundry-rs/forge-std

contracts/erc20/contracts/src/v06/WETH9.sol

@@ -0,0 +1,758 @@
+// Copyright (C) 2015, 2016, 2017 Dapphub
+
+// This program is free software: you can redistribute it and/or modify
+// it under the terms of the GNU General Public License as published by
+// the Free Software Foundation, either version 3 of the License, or
+// (at your option) any later version.
+
+// This program is distributed in the hope that it will be useful,
+// but WITHOUT ANY WARRANTY; without even the implied warranty of
+// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+// GNU General Public License for more details.
+
+// You should have received a copy of the GNU General Public License
+// along with this program.  If not, see <http://www.gnu.org/licenses/>.
+
+// solhint-disable
+pragma solidity ^0.6.5;
+
+
+contract WETH9 {
+    string public name     = "Wrapped Ether";
+    string public symbol   = "WETH";
+    uint8  public decimals = 18;
+
+    event  Approval(address indexed _owner, address indexed _spender, uint _value);
+    event  Transfer(address indexed _from, address indexed _to, uint _value);
+    event  Deposit(address indexed _owner, uint _value);
+    event  Withdrawal(address indexed _owner, uint _value);
+
+    mapping (address => uint)                       public  balanceOf;
+    mapping (address => mapping (address => uint))  public  allowance;
+
+    receive() external payable {
+        deposit();
+    }
+    function deposit() public payable {
+        balanceOf[msg.sender] += msg.value;
+        emit Deposit(msg.sender, msg.value);
+    }
+    function withdraw(uint wad) public {
+        require(balanceOf[msg.sender] >= wad);
+        balanceOf[msg.sender] -= wad;
+        msg.sender.transfer(wad);
+        emit Withdrawal(msg.sender, wad);
+    }
+
+    function totalSupply() public view returns (uint) {
+        return address(this).balance;
+    }
+
+    function approve(address guy, uint wad) public returns (bool) {
+        allowance[msg.sender][guy] = wad;
+        emit Approval(msg.sender, guy, wad);
+        return true;
+    }
+
+    function transfer(address dst, uint wad) public returns (bool) {
+        return transferFrom(msg.sender, dst, wad);
+    }
+
+    function transferFrom(address src, address dst, uint wad)
+        public
+        returns (bool)
+    {
+        require(balanceOf[src] >= wad);
+
+        if (src != msg.sender && allowance[src][msg.sender] != uint(-1)) {
+            require(allowance[src][msg.sender] >= wad);
+            allowance[src][msg.sender] -= wad;
+        }
+
+        balanceOf[src] -= wad;
+        balanceOf[dst] += wad;
+
+        emit Transfer(src, dst, wad);
+
+        return true;
+    }
+}
+
+
+/*
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+you grant is automatically extended to all recipients of the covered
+work and works based on it.
+
+  A patent license is "discriminatory" if it does not include within
+the scope of its coverage, prohibits the exercise of, or is
+conditioned on the non-exercise of one or more of the rights that are
+specifically granted under this License.  You may not convey a covered
+work if you are a party to an arrangement with a third party that is
+in the business of distributing software, under which you make payment
+to the third party based on the extent of your activity of conveying
+the work, and under which the third party grants, to any of the
+parties who would receive the covered work from you, a discriminatory
+patent license (a) in connection with copies of the covered work
+conveyed by you (or copies made from those copies), or (b) primarily
+for and in connection with specific products or compilations that
+contain the covered work, unless you entered into that arrangement,
+or that patent license was granted, prior to 28 March 2007.
+
+  Nothing in this License shall be construed as excluding or limiting
+any implied license or other defenses to infringement that may
+otherwise be available to you under applicable patent law.
+
+  12. No Surrender of Others' Freedom.
+
+  If conditions are imposed on you (whether by court order, agreement or
+otherwise) that contradict the conditions of this License, they do not
+excuse you from the conditions of this License.  If you cannot convey a
+covered work so as to satisfy simultaneously your obligations under this
+License and any other pertinent obligations, then as a consequence you may
+not convey it at all.  For example, if you agree to terms that obligate you
+to collect a royalty for further conveying from those to whom you convey
+the Program, the only way you could satisfy both those terms and this
+License would be to refrain entirely from conveying the Program.
+
+  13. Use with the GNU Affero General Public License.
+
+  Notwithstanding any other provision of this License, you have
+permission to link or combine any covered work with a work licensed
+under version 3 of the GNU Affero General Public License into a single
+combined work, and to convey the resulting work.  The terms of this
+License will continue to apply to the part which is the covered work,
+but the special requirements of the GNU Affero General Public License,
+section 13, concerning interaction through a network will apply to the
+combination as such.
+
+  14. Revised Versions of this License.
+
+  The Free Software Foundation may publish revised and/or new versions of
+the GNU General Public License from time to time.  Such new versions will
+be similar in spirit to the present version, but may differ in detail to
+address new problems or concerns.
+
+  Each version is given a distinguishing version number.  If the
+Program specifies that a certain numbered version of the GNU General
+Public License "or any later version" applies to it, you have the
+option of following the terms and conditions either of that numbered
+version or of any later version published by the Free Software
+Foundation.  If the Program does not specify a version number of the
+GNU General Public License, you may choose any version ever published
+by the Free Software Foundation.
+
+  If the Program specifies that a proxy can decide which future
+versions of the GNU General Public License can be used, that proxy's
+public statement of acceptance of a version permanently authorizes you
+to choose that version for the Program.
+
+  Later license versions may give you additional or different
+permissions.  However, no additional obligations are imposed on any
+author or copyright holder as a result of your choosing to follow a
+later version.
+
+  15. Disclaimer of Warranty.
+
+  THERE IS NO WARRANTY FOR THE PROGRAM, TO THE EXTENT PERMITTED BY
+APPLICABLE LAW.  EXCEPT WHEN OTHERWISE STATED IN WRITING THE COPYRIGHT
+HOLDERS AND/OR OTHER PARTIES PROVIDE THE PROGRAM "AS IS" WITHOUT WARRANTY
+OF ANY KIND, EITHER EXPRESSED OR IMPLIED, INCLUDING, BUT NOT LIMITED TO,
+THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
+PURPOSE.  THE ENTIRE RISK AS TO THE QUALITY AND PERFORMANCE OF THE PROGRAM
+IS WITH YOU.  SHOULD THE PROGRAM PROVE DEFECTIVE, YOU ASSUME THE COST OF
+ALL NECESSARY SERVICING, REPAIR OR CORRECTION.
+
+  16. Limitation of Liability.
+
+  IN NO EVENT UNLESS REQUIRED BY APPLICABLE LAW OR AGREED TO IN WRITING
+WILL ANY COPYRIGHT HOLDER, OR ANY OTHER PARTY WHO MODIFIES AND/OR CONVEYS
+THE PROGRAM AS PERMITTED ABOVE, BE LIABLE TO YOU FOR DAMAGES, INCLUDING ANY
+GENERAL, SPECIAL, INCIDENTAL OR CONSEQUENTIAL DAMAGES ARISING OUT OF THE
+USE OR INABILITY TO USE THE PROGRAM (INCLUDING BUT NOT LIMITED TO LOSS OF
+DATA OR DATA BEING RENDERED INACCURATE OR LOSSES SUSTAINED BY YOU OR THIRD
+PARTIES OR A FAILURE OF THE PROGRAM TO OPERATE WITH ANY OTHER PROGRAMS),
+EVEN IF SUCH HOLDER OR OTHER PARTY HAS BEEN ADVISED OF THE POSSIBILITY OF
+SUCH DAMAGES.
+
+  17. Interpretation of Sections 15 and 16.
+
+  If the disclaimer of warranty and limitation of liability provided
+above cannot be given local legal effect according to their terms,
+reviewing courts shall apply local law that most closely approximates
+an absolute waiver of all civil liability in connection with the
+Program, unless a warranty or assumption of liability accompanies a
+copy of the Program in return for a fee.
+
+                     END OF TERMS AND CONDITIONS
+
+            How to Apply These Terms to Your New Programs
+
+  If you develop a new program, and you want it to be of the greatest
+possible use to the public, the best way to achieve this is to make it
+free software which everyone can redistribute and change under these terms.
+
+  To do so, attach the following notices to the program.  It is safest
+to attach them to the start of each source file to most effectively
+state the exclusion of warranty; and each file should have at least
+the "copyright" line and a pointer to where the full notice is found.
+
+    <one line to give the program's name and a brief idea of what it does.>
+    Copyright (C) <year>  <name of author>
+
+    This program is free software: you can redistribute it and/or modify
+    it under the terms of the GNU General Public License as published by
+    the Free Software Foundation, either version 3 of the License, or
+    (at your option) any later version.
+
+    This program is distributed in the hope that it will be useful,
+    but WITHOUT ANY WARRANTY; without even the implied warranty of
+    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+    GNU General Public License for more details.
+
+    You should have received a copy of the GNU General Public License
+    along with this program.  If not, see <http://www.gnu.org/licenses/>.
+
+Also add information on how to contact you by electronic and paper mail.
+
+  If the program does terminal interaction, make it output a short
+notice like this when it starts in an interactive mode:
+
+    <program>  Copyright (C) <year>  <name of author>
+    This program comes with ABSOLUTELY NO WARRANTY; for details type `show w'.
+    This is free software, and you are welcome to redistribute it
+    under certain conditions; type `show c' for details.
+
+The hypothetical commands `show w' and `show c' should show the appropriate
+parts of the General Public License.  Of course, your program's commands
+might be different; for a GUI interface, you would use an "about box".
+
+  You should also get your employer (if you work as a programmer) or school,
+if any, to sign a "copyright disclaimer" for the program, if necessary.
+For more information on this, and how to apply and follow the GNU GPL, see
+<http://www.gnu.org/licenses/>.
+
+  The GNU General Public License does not permit incorporating your program
+into proprietary programs.  If your program is a subroutine library, you
+may consider it more useful to permit linking proprietary applications with
+the library.  If this is what you want to do, use the GNU Lesser General
+Public License instead of this License.  But first, please read
+<http://www.gnu.org/philosophy/why-not-lgpl.html>.
+
+*/

contracts/zero-ex/contracts/test/foundry/ContractTest.sol

@@ -0,0 +1,30 @@
+// SPDX-License-Identifier: Apache-2.0
+/*
+
+  Copyright 2022 ZeroEx Intl.
+
+  Licensed under the Apache License, Version 2.0 (the "License");
+  you may not use this file except in compliance with the License.
+  You may obtain a copy of the License at
+
+    http://www.apache.org/licenses/LICENSE-2.0
+
+  Unless required by applicable law or agreed to in writing, software
+  distributed under the License is distributed on an "AS IS" BASIS,
+  WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+  See the License for the specific language governing permissions and
+  limitations under the License.
+
+*/
+
+pragma solidity ^0.6;
+
+import "forge-std/Test.sol";
+
+contract ContractTest is Test {
+    function setUp() public {}
+
+    function testExample() public {
+      assertTrue(true);
+    }
+}

contracts/zero-ex/contracts/test/foundry/protocol-academy/1-architecture/Architecture.t.sol

@@ -0,0 +1,66 @@
+// SPDX-License-Identifier: Apache-2.0
+/*
+
+  Copyright 2022 ZeroEx Intl.
+
+  Licensed under the Apache License, Version 2.0 (the "License");
+  you may not use this file except in compliance with the License.
+  You may obtain a copy of the License at
+
+    http://www.apache.org/licenses/LICENSE-2.0
+
+  Unless required by applicable law or agreed to in writing, software
+  distributed under the License is distributed on an "AS IS" BASIS,
+  WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+  See the License for the specific language governing permissions and
+  limitations under the License.
+
+*/
+
+pragma solidity ^0.6;
+pragma experimental ABIEncoderV2;
+
+import "src/features/OtcOrdersFeature.sol";
+import "src/features/TransformERC20Feature.sol";
+import "src/features/UniswapFeature.sol";
+import "src/features/UniswapV3Feature.sol";
+import "@0x/contracts-erc20/contracts/src/v06/IEtherTokenV06.sol";
+import "../utils/DeployZeroEx.sol";
+
+contract Architecture is DeployZeroEx {
+
+    function testFeatureDeployment()
+        public
+    {
+        deployZeroEx();
+        // If we look up the address of the Uniswap Implementation, it will be empty
+        // as it hasn't yet been registered.
+        emit log_named_address("sellToUniswap implementation", ZERO_EX.getFunctionImplementation(UniswapFeature.sellToUniswap.selector));
+        // Try registering the implementation
+        // Technically the constructor argument is the WETH address, which doesn't yet exist in this environment
+        UniswapFeature uniswapFeature = new UniswapFeature(IEtherTokenV06(address(0)));
+        emit log_named_address("UniswapFeature deployed at", address(uniswapFeature));
+        // As part of the migration, the UniswapFeature registers its own selectors
+        IZERO_EX.migrate(address(uniswapFeature), abi.encodePacked(uniswapFeature.migrate.selector), address(this));
+        // You will observe in the logs the following events
+        //  ├─ emit ProxyFunctionUpdated(selector: 0xd9627aa4, oldImpl: 0x0000000000000000000000000000000000000000, newImpl: UniswapFeature: [0xf5a2fe45f4f1308502b1c136b9ef8af136141382])
+        // sellToUniswap(address[],uint256,uint256,bool) = 0xd9627aa4
+        // cast keccak 'sellToUniswap(address[],uint256,uint256,bool)'
+        // > 0xd9627aa4...
+        emit log_named_address("sellToUniswap implementation", ZERO_EX.getFunctionImplementation(UniswapFeature.sellToUniswap.selector));
+        // From now on it will be possible to call 0xEP.sellToUniswap which will be registered.
+
+        // Try deploying another Feature such as
+
+        // OtcOrdersFeature
+        // ...
+        emit log_named_address("fillOtcOrder implementation", ZERO_EX.getFunctionImplementation(OtcOrdersFeature.fillOtcOrder.selector));
+
+        // UniswapV3Feature
+        // ...
+        emit log_named_address("sellTokenForTokenToUniswapV3 implementation", ZERO_EX.getFunctionImplementation(UniswapV3Feature.sellTokenForTokenToUniswapV3.selector));
+
+        // Or for extra credit, the TransformERC20Feature
+        emit log_named_address("transformERC20 implementation", ZERO_EX.getFunctionImplementation(TransformERC20Feature.transformERC20.selector));
+    }
+}

contracts/zero-ex/contracts/test/foundry/protocol-academy/1-architecture/DelegateCall.t.sol

@@ -0,0 +1,97 @@
+
+// SPDX-License-Identifier: Apache-2.0
+/*
+
+  Copyright 2022 ZeroEx Intl.
+
+  Licensed under the Apache License, Version 2.0 (the "License");
+  you may not use this file except in compliance with the License.
+  You may obtain a copy of the License at
+
+    http://www.apache.org/licenses/LICENSE-2.0
+
+  Unless required by applicable law or agreed to in writing, software
+  distributed under the License is distributed on an "AS IS" BASIS,
+  WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+  See the License for the specific language governing permissions and
+  limitations under the License.
+
+*/
+
+pragma solidity ^0.6;
+pragma experimental ABIEncoderV2;
+
+import "forge-std/Test.sol";
+
+interface LanguageContract {
+    function hello()
+        external
+        returns (address, string memory);
+}
+
+contract ContractA is LanguageContract {
+    function hello()
+        public
+        override
+        returns (address, string memory)
+    {
+        return (address(this), "Why hello there!");
+    }
+}
+
+contract ContractB is LanguageContract {
+    function hello()
+        public
+        override
+        returns (address, string memory)
+    {
+        return (address(this), "Protocol Academy was here");
+    }
+}
+
+contract DelegateCaller {
+    function delegateCall(address impl)
+        public
+        returns (address addr, string memory str)
+    {
+        (bool success, bytes memory resultData) = impl.delegatecall(abi.encodePacked(LanguageContract.hello.selector));
+        (addr, str) = abi.decode(resultData, (address, string));
+    }
+}
+
+contract DelegateCall is Test {
+    LanguageContract A;
+    LanguageContract B;
+    DelegateCaller caller;
+
+    function setUp()
+      public
+    {
+        A = new ContractA();
+        B = new ContractB();
+        caller = new DelegateCaller();
+    }
+
+
+    function testDelegateCall()
+        public
+        returns (uint256 val)
+    {
+        // ← DelegateCaller: [0xefc56627233b02ea95bae7e19f648d7dcd5bb132], "Why hello there!"
+        caller.delegateCall(address(A));
+
+        // ← DelegateCaller: [0xefc56627233b02ea95bae7e19f648d7dcd5bb132], "Protocol Academy was here"
+        caller.delegateCall(address(B));
+
+        // Note how in the above results the context is always the DelegateCaller context
+        // with address 0xefc56627233b02ea95bae7e19f648d7dcd5bb132
+
+        // ← ContractA: [0xce71065d4017f316ec606fe4422e11eb2c47c246], "Why hello there!"
+        A.hello();
+
+        // ← ContractB: [0x185a4dc360ce69bdccee33b3784b0282f7961aea], "Protocol Academy was here"
+        B.hello();
+
+        // Note how in the above results the context is each individual contract
+    }
+}

contracts/zero-ex/contracts/test/foundry/protocol-academy/1-architecture/OpcodeCosts.t.sol

@@ -0,0 +1,75 @@
+// SPDX-License-Identifier: Apache-2.0
+/*
+
+  Copyright 2022 ZeroEx Intl.
+
+  Licensed under the Apache License, Version 2.0 (the "License");
+  you may not use this file except in compliance with the License.
+  You may obtain a copy of the License at
+
+    http://www.apache.org/licenses/LICENSE-2.0
+
+  Unless required by applicable law or agreed to in writing, software
+  distributed under the License is distributed on an "AS IS" BASIS,
+  WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+  See the License for the specific language governing permissions and
+  limitations under the License.
+
+*/
+
+pragma solidity ^0.6;
+pragma experimental ABIEncoderV2;
+
+import "forge-std/Test.sol";
+
+import "src/IZeroEx.sol";
+import "src/ZeroEx.sol";
+import "src/migrations/InitialMigration.sol";
+import "src/features/OtcOrdersFeature.sol";
+import "src/features/OwnableFeature.sol";
+import "src/features/SimpleFunctionRegistryFeature.sol";
+import "src/features/TransformERC20Feature.sol";
+import "src/features/UniswapFeature.sol";
+import "src/features/UniswapV3Feature.sol";
+import "@0x/contracts-erc20/contracts/src/v06/IEtherTokenV06.sol";
+
+contract StorageContract {
+    uint256 public storedValue = 0;
+
+    function increase()
+        public
+        returns (uint256)
+    {
+        storedValue++;
+        return storedValue;
+    }
+}
+
+contract OpcodeCosts is Test {
+
+    uint256 public storedValue = 0;
+    StorageContract store;
+
+    function setUp()
+      public
+    {
+        store = new StorageContract();
+    }
+
+
+    function testLoadFromStorage()
+        public
+        returns (uint256 val)
+    {
+        // [2306] StorageContract::storedValue() [staticcall]
+        val = store.storedValue();
+    }
+
+    function testLoadAndStore()
+        public
+        returns (uint256 val)
+    {
+        // [22346] StorageContract::increase()
+        val = store.increase();
+    }
+}

contracts/zero-ex/contracts/test/foundry/protocol-academy/2-features/DeployedFeatures.t.sol

@@ -0,0 +1,93 @@
+// SPDX-License-Identifier: Apache-2.0
+/*
+
+  Copyright 2022 ZeroEx Intl.
+
+  Licensed under the Apache License, Version 2.0 (the "License");
+  you may not use this file except in compliance with the License.
+  You may obtain a copy of the License at
+
+    http://www.apache.org/licenses/LICENSE-2.0
+
+  Unless required by applicable law or agreed to in writing, software
+  distributed under the License is distributed on an "AS IS" BASIS,
+  WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+  See the License for the specific language governing permissions and
+  limitations under the License.
+
+*/
+
+pragma solidity ^0.6;
+pragma experimental ABIEncoderV2;
+
+import "forge-std/Test.sol";
+
+import "src/IZeroEx.sol";
+import "src/ZeroEx.sol";
+import "src/features/interfaces/IFeature.sol";
+import "src/features/TransformERC20Feature.sol";
+import "../utils/TestUtils.sol";
+
+
+// TODO: Try running this test on various networks
+//       forge test --match-contract DeployedFeatures --fork-url <rpc_url> -vvv
+contract DeployedFeatures is TestUtils {
+    ZeroEx public ZERO_EX = ZeroEx(0xDef1C0ded9bec7F1a1670819833240f027b25EfF);
+    IZeroEx public IZERO_EX = IZeroEx(0xDef1C0ded9bec7F1a1670819833240f027b25EfF);
+
+    function testLookupFunction()
+        public
+    {
+        uint256 chainId;
+        assembly { chainId := chainid() }
+        // Skip if not in forking mode
+        if (chainId == 31337) {
+            emit log_string("Not in forking mode; skipping test");
+            return;
+        }
+
+        // TODO: try swapping out this selector
+        bytes4 selector = TransformERC20Feature.transformERC20.selector;
+        address impl = ZERO_EX.getFunctionImplementation(selector);
+        if (impl == address(0)) {
+            emit log_named_address("v0.0.0", impl);
+        } else {
+            uint256 version = IFeature(impl).FEATURE_VERSION();
+            // NOTE: we used to have a bug where the version was 
+            //       being incorrectly encoded as 0 lol
+            emit log_named_address(_versionString(version), impl);
+        }
+
+        uint256 rollbackLength = IZERO_EX.getRollbackLength(selector);
+        if (rollbackLength > 1) {
+            for (uint256 i = rollbackLength - 1; i > 0; i--) {
+                address prevImpl = IZERO_EX.getRollbackEntryAtIndex(selector, i);
+                if (prevImpl == address(0)) {
+                    emit log_named_address("v0.0.0", prevImpl);
+                } else {
+                    uint256 version = IFeature(prevImpl).FEATURE_VERSION();
+                    emit log_named_address(_versionString(version), prevImpl);
+                }
+            }
+        }
+    }
+
+    function _versionString(uint256 encodedVersion) 
+        private 
+        pure 
+        returns (string memory versionString)
+    {
+        uint32 major = uint32(encodedVersion >> 64);
+        uint32 minor = uint32(encodedVersion >> 32);
+        uint32 revision = uint32(encodedVersion);
+
+        return string(abi.encodePacked(
+            "v",
+            _toString(uint256(major)),
+            ".",
+            _toString(uint256(minor)),
+            ".",
+            _toString(uint256(revision))
+        ));
+    }
+}

contracts/zero-ex/contracts/test/foundry/protocol-academy/2-features/FeatureStorage.t.sol

@@ -0,0 +1,132 @@
+// SPDX-License-Identifier: Apache-2.0
+/*
+
+  Copyright 2022 ZeroEx Intl.
+
+  Licensed under the Apache License, Version 2.0 (the "License");
+  you may not use this file except in compliance with the License.
+  You may obtain a copy of the License at
+
+    http://www.apache.org/licenses/LICENSE-2.0
+
+  Unless required by applicable law or agreed to in writing, software
+  distributed under the License is distributed on an "AS IS" BASIS,
+  WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+  See the License for the specific language governing permissions and
+  limitations under the License.
+
+*/
+
+pragma solidity ^0.6;
+pragma experimental ABIEncoderV2;
+
+import "src/fixins/FixinCommon.sol";
+import "src/migrations/LibMigrate.sol";
+import "../utils/DeployZeroEx.sol";
+
+contract FibonacciFeature is FixinCommon {
+    uint256 private prevFib;
+    uint256 private fib;
+
+    function migrate()
+        external
+        returns (bytes4 success)
+    {
+        _registerFeatureFunction(this.stepFibonacci.selector);
+        _registerFeatureFunction(this.currentFibonacci.selector);
+        return LibMigrate.MIGRATE_SUCCESS;
+    }
+
+    function stepFibonacci() external {
+        if (prevFib == 0 && fib == 0) {
+            fib = 1;
+            return;
+        } else {
+            uint256 nextFib = prevFib + fib;
+            prevFib = fib;
+            fib = nextFib;
+        }
+    }
+
+    function currentFibonacci() external view returns (uint256) {
+        return fib;
+    }
+}
+
+contract VoteFeature is FixinCommon {
+    uint256 private good;
+    uint256 private bad;
+    mapping (address => bool) hasVoted;
+
+    function migrate()
+        external
+        returns (bytes4 success)
+    {
+        _registerFeatureFunction(this.pineappleOnPizzaIsGood.selector);
+        _registerFeatureFunction(this.pineappleOnPizzaIsBad.selector);
+        _registerFeatureFunction(this.currentVotes.selector);
+        return LibMigrate.MIGRATE_SUCCESS;
+    }
+
+    function pineappleOnPizzaIsGood() external {
+        require(!hasVoted[msg.sender]);
+        hasVoted[msg.sender] = true;
+        good++;
+    }
+
+    function pineappleOnPizzaIsBad() external {
+        require(!hasVoted[msg.sender]);
+        hasVoted[msg.sender] = true;
+        bad++;
+    }
+
+    function currentVotes() external view returns (uint256, uint256) {
+        return (good, bad);
+    }
+}
+
+contract FeatureStorage is DeployZeroEx {
+
+    function setUp() public {
+        deployZeroEx();
+        FibonacciFeature fibonacciFeature = new FibonacciFeature();
+        emit log_named_address("FibonacciFeature deployed at", address(fibonacciFeature));
+        IZERO_EX.migrate(address(fibonacciFeature), abi.encodePacked(fibonacciFeature.migrate.selector), address(this));
+        emit log_named_address("stepFibonacci implementation", ZERO_EX.getFunctionImplementation(FibonacciFeature.stepFibonacci.selector));        
+        
+        VoteFeature voteFeature = new VoteFeature();
+        emit log_named_address("VoteFeature deployed at", address(voteFeature));
+        IZERO_EX.migrate(address(voteFeature), abi.encodePacked(voteFeature.migrate.selector), address(this));
+    }
+
+    function testFeatureStorage()
+        public
+    {   
+        for (uint256 i = 0; i < 10; i++) {
+            emit log_named_uint("fib", FibonacciFeature(address(ZERO_EX)).currentFibonacci());
+            FibonacciFeature(address(ZERO_EX)).stepFibonacci();
+        }
+
+        for (uint256 i = 0; i < 10; i++) {
+            address voter = _pseudoRandomAddress(i);
+            bool likesPineappleOnPizza = (uint160(voter) % 2) == 1;
+            hoax(voter);
+            likesPineappleOnPizza 
+                ? VoteFeature(address(ZERO_EX)).pineappleOnPizzaIsGood() 
+                : VoteFeature(address(ZERO_EX)).pineappleOnPizzaIsBad();
+        }
+        (uint256 good, uint256 bad) = VoteFeature(address(ZERO_EX)).currentVotes();
+        
+        emit log_named_uint("good votes", good);
+        emit log_named_uint("bad votes", bad);
+        emit log_named_uint("fib", FibonacciFeature(address(ZERO_EX)).currentFibonacci());
+
+        // TODO: Fix the Fibonacci and Vote features so that their respective storage 
+        //       variables do not collide. Create LibFibonacciStorage and LibVoteStorage
+        //       to do so. 
+    }
+
+    function _pseudoRandomAddress(uint256 seed) private pure returns (address) {
+        return address(uint160(uint256(keccak256(abi.encodePacked(seed)))));
+    }
+}

contracts/zero-ex/contracts/test/foundry/protocol-academy/2-features/Migration.t.sol

@@ -0,0 +1,155 @@
+// SPDX-License-Identifier: Apache-2.0
+/*
+
+  Copyright 2022 ZeroEx Intl.
+
+  Licensed under the Apache License, Version 2.0 (the "License");
+  you may not use this file except in compliance with the License.
+  You may obtain a copy of the License at
+
+    http://www.apache.org/licenses/LICENSE-2.0
+
+  Unless required by applicable law or agreed to in writing, software
+  distributed under the License is distributed on an "AS IS" BASIS,
+  WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+  See the License for the specific language governing permissions and
+  limitations under the License.
+
+*/
+
+pragma solidity ^0.6;
+pragma experimental ABIEncoderV2;
+
+import "src/fixins/FixinCommon.sol";
+import "src/migrations/LibMigrate.sol";
+import "../utils/DeployZeroEx.sol";
+
+contract ZooFeature is FixinCommon {
+    event Meow();
+    event Woof();
+    event SlothNoises();
+
+    function migrate()
+        external
+        returns (bytes4 success)
+    {
+        _registerFeatureFunction(this.cat.selector);
+        _registerFeatureFunction(this.dog.selector);
+        _registerFeatureFunction(this.sloth.selector);
+        return LibMigrate.MIGRATE_SUCCESS;
+    }
+
+    function cat() external {
+        emit Meow();
+    }
+    function dog() external {
+        emit Woof();
+    }
+    function sloth() external {
+        emit SlothNoises();
+    }
+}
+
+contract ZooFeatureV2 is FixinCommon {
+    event Meow();
+    event Purr();
+    event Woof();
+    event CapybaraNoises();
+
+    function migrate()
+        external
+        returns (bytes4 success)
+    {
+        _registerFeatureFunction(this.cat.selector);
+        _registerFeatureFunction(this.dog.selector);
+        _registerFeatureFunction(this.capybara.selector);
+        return LibMigrate.MIGRATE_SUCCESS;
+    }
+
+    // NOTE: the function signature for `cat` has changed, so the selectors are different!
+    function cat(bool happy) external {
+        if (happy) {
+            emit Purr();
+        } else {
+            emit Meow();
+        }
+    }
+    // dog is the same
+    function dog() external {
+        emit Woof();
+    }
+    // new!
+    function capybara() external {
+        emit CapybaraNoises();
+    }
+    // sloth is not in V2
+}
+
+contract Migration is DeployZeroEx {
+
+    function setUp() public {
+        deployZeroEx();
+    }
+
+    function testMigration()
+        public
+    {
+        ZooFeature zooFeature = new ZooFeature();
+        IZERO_EX.migrate(address(zooFeature), abi.encodePacked(zooFeature.migrate.selector), address(this));
+
+        // The functions in ZooFeature are now registered in the exchange proxy!
+        // Try them out.
+        ZooFeature(address(ZERO_EX)).dog();
+        ZooFeature(address(ZERO_EX)).cat();
+        ZooFeature(address(ZERO_EX)).sloth();
+    }
+
+    function testUpgrade()
+        public
+    {
+        // Original version
+        ZooFeature zooFeature = new ZooFeature();
+        IZERO_EX.migrate(address(zooFeature), abi.encodePacked(zooFeature.migrate.selector), address(this));
+        // Upgrade
+        ZooFeatureV2 zooFeatureV2 = new ZooFeatureV2();
+        IZERO_EX.migrate(address(zooFeatureV2), abi.encodePacked(zooFeatureV2.migrate.selector), address(this));
+
+        // The functions in ZooFeatureV2 are now registered in the exchange proxy!
+        // Try them out.
+        ZooFeatureV2(address(ZERO_EX)).dog();
+        ZooFeatureV2(address(ZERO_EX)).cat(true);
+        ZooFeatureV2(address(ZERO_EX)).cat(false);
+        ZooFeatureV2(address(ZERO_EX)).capybara();
+
+        // `sloth` is still registered
+        ZooFeature(address(ZERO_EX)).sloth();
+        // The old `cat` function is still registered, since it has a different selector
+        emit log_named_bytes('cat()', abi.encodePacked(zooFeature.cat.selector));
+        emit log_named_bytes('cat(bool)', abi.encodePacked(zooFeatureV2.cat.selector));
+        ZooFeature(address(ZERO_EX)).cat();
+
+        // Let's deregister the sloth and old cat functions
+        IZERO_EX.rollback(zooFeature.cat.selector, address(0));
+        IZERO_EX.rollback(zooFeature.sloth.selector, address(0));
+
+        // Now trying to call the old cat or sloth reverts
+        try ZooFeature(address(ZERO_EX)).cat() {} 
+        catch (bytes memory e) {
+            emit log_string("cat() reverted");
+        }
+        try ZooFeature(address(ZERO_EX)).sloth() {}
+        catch (bytes memory e) {
+            emit log_string("sloth() reverted");
+        }
+
+        // dog() was upgraded, so it's v1 address is in the `implHistory`
+        emit log_named_uint(
+            "dog() rollback length", 
+            IZERO_EX.getRollbackLength(zooFeature.dog.selector)
+        );
+        emit log_named_address(
+            "dog() v1 is in the history", 
+            IZERO_EX.getRollbackEntryAtIndex(zooFeature.dog.selector, 1)
+        );
+    }
+}

contracts/zero-ex/contracts/test/foundry/protocol-academy/3-transformers/BasicSwapForked.t.sol

@@ -0,0 +1,152 @@
+// SPDX-License-Identifier: Apache-2.0
+/*
+
+  Copyright 2022 ZeroEx Intl.
+
+  Licensed under the Apache License, Version 2.0 (the "License");
+  you may not use this file except in compliance with the License.
+  You may obtain a copy of the License at
+
+    http://www.apache.org/licenses/LICENSE-2.0
+
+  Unless required by applicable law or agreed to in writing, software
+  distributed under the License is distributed on an "AS IS" BASIS,
+  WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+  See the License for the specific language governing permissions and
+  limitations under the License.
+
+*/
+
+pragma solidity ^0.6;
+pragma experimental ABIEncoderV2;
+
+import "../utils/ForkUtils.sol";
+import "../utils/TestUtils.sol";
+import "src/IZeroEx.sol";
+import "@0x/contracts-erc20/contracts/src/v06/IEtherTokenV06.sol";
+import "src/features/TransformERC20Feature.sol";
+import "src/external/TransformerDeployer.sol";
+import "src/transformers/WethTransformer.sol";
+import "src/transformers/FillQuoteTransformer.sol";
+import "src/transformers/bridges/BridgeProtocols.sol";
+import "src/transformers/bridges/BridgeAdapter.sol";
+
+/*
+    This test must be run in forked mode
+    e.g forge test -vvvv -m 'testBasicSwap' -f ETH_RPC_URL
+    It is also helpful to have an Etherscan API key exported
+    export ETHERSCAN_API_KEY=
+    as Foundry will fetch source code and names
+*/
+
+contract BasicSwapForkedTest is
+    ForkUtils,
+    TestUtils
+{
+    IZeroEx public IZERO_EX = IZeroEx(0xDef1C0ded9bec7F1a1670819833240f027b25EfF);
+    IEtherTokenV06 WETH = IEtherTokenV06(0xC02aaA39b223FE8D0A0e5C4F27eAD9083C756Cc2);
+
+    // These addresses are taken from contract-addresses for Ethereum Mainnet
+    TransformerDeployer transformerDeployer = TransformerDeployer(0x39dCe47a67aD34344EAB877eaE3Ef1FA2a1d50Bb);
+    WethTransformer wethTransformer = WethTransformer(0xb2bc06a4EfB20FC6553a69Dbfa49B7bE938034A7);
+    // Note this may be outdated as it is often updated
+    FillQuoteTransformer fillQuoteTransformer = FillQuoteTransformer(0xADBE39F2988A8Be1C1120F05e28CC888b150c8a6);
+
+    function setUp()
+        public
+        onlyForked()
+    {
+        // HACK we deploy some fake transformers just so Foundry
+        // can detect these contracts for decoding
+        new WethTransformer(IEtherTokenV06(address(0)));
+        vm.label(address(wethTransformer), "WethTransformer");
+        new FillQuoteTransformer(IBridgeAdapter(address(0)), INativeOrdersFeature(address(0)));
+        vm.label(address(fillQuoteTransformer), "FillQuoteTransformer");
+        new BridgeAdapter(IEtherTokenV06(address(0)));
+        vm.label(address(fillQuoteTransformer.bridgeAdapter()), "BridgeAdapter");
+        vm.label(address(IZERO_EX.getTransformWallet()), "FlashWallet");
+    }
+
+    function testBasicSwap()
+        public
+        onlyForked()
+    {
+        IERC20TokenV06 USDC = IERC20TokenV06(0xA0b86991c6218b36c1d19D4a2e9Eb0cE3606eB48);
+        // Create our list of transformations, let's do WethTransformer and FillQuoteTransformer
+        ITransformERC20Feature.Transformation[] memory transformations = new ITransformERC20Feature.Transformation[](2);
+        // Use our cheeky search helper to find the nonce rather than hardcode it
+        //  hint: it's 6 for WethTransformer and 22 for this FillQuoteTransformer
+        transformations[0].deploymentNonce = _findTransformerNonce(address(wethTransformer), address(transformerDeployer));
+        transformations[1].deploymentNonce = _findTransformerNonce(address(fillQuoteTransformer), address(transformerDeployer));
+
+        emit log_named_uint("WethTransformer nonce", transformations[0].deploymentNonce);
+        emit log_named_uint("FillQuoteTransformer nonce", transformations[1].deploymentNonce);
+
+        // Set the first transformation to transform ETH into WETH
+        transformations[0].data = abi.encode(LibERC20Transformer.ETH_TOKEN_ADDRESS, 1e18);
+
+        // Set up the FillQuoteTransformer data
+        FillQuoteTransformer.TransformData memory fqtData;
+        fqtData.side = FillQuoteTransformer.Side.Sell;
+        // FQT deals with tokens, not ETH, so it needs a WETH transformer
+        // to be applied beforehand
+        fqtData.sellToken = IERC20TokenV06(address(WETH));
+        fqtData.buyToken =  IERC20TokenV06(address(USDC));
+        // the FQT has a sequence, e.g first RFQ then Limit then Bridge
+        // since solidity doesn't support arrays of different types, this is one simple solution
+        // We use a Bridge order type here as we will fill on UniswapV2
+        fqtData.fillSequence = new FillQuoteTransformer.OrderType[](1);
+        fqtData.fillSequence[0] = FillQuoteTransformer.OrderType.Bridge;
+        // The amount to fill
+        fqtData.fillAmount = 1e18;
+        // Now let's set up a UniswapV2 fill
+        fqtData.bridgeOrders = new IBridgeAdapter.BridgeOrder[](1);
+        IBridgeAdapter.BridgeOrder memory order;
+        // The ID is shifted so we can concat <PROTOCOL><NAME>
+        // e.g <UniswapV2Protocol><UniswapV2>
+        // or  <UniswapV2Protocol><SushiSwap> for forks
+        order.source = bytes32(uint256(BridgeProtocols.UNISWAPV2) << 128);
+        // How much we want to fill on this order, which can be different to the total
+        // e.g 50/50 split this would be half
+        order.takerTokenAmount = 1e18;
+        // Set this low as the price of ETH/USDC can change
+        order.makerTokenAmount = 1;
+        // The data needed specifically for the source to fill,
+        // e.g for UniswapV2 it is the router contract and a path. See MixinUniswapV2
+        address[] memory uniPath = new address[](2);
+        uniPath[0] = address(WETH);
+        uniPath[1] = address(USDC);
+        order.bridgeData = abi.encode(address(0xf164fC0Ec4E93095b804a4795bBe1e041497b92a), uniPath);
+        fqtData.bridgeOrders[0] = order;
+        // Now encode the FQT data into the transformation
+        transformations[1].data = abi.encode(fqtData);
+
+
+        // Now let's do it!
+        // Give ourselves 1e18 ETH
+        vm.deal(address(this), 1e18);
+        IZERO_EX.transformERC20{value: 1e18}(
+            // input token
+            IERC20TokenV06(LibERC20Transformer.ETH_TOKEN_ADDRESS),
+            // output token
+            IERC20TokenV06(address(USDC)),
+            // input token amount
+            1e18,
+            // min output token amount, set this low as ETH/USDC price will move
+            1,
+            // list of transform
+            transformations
+        );
+        // Hoollly heck we bought some USDC
+        assertGt(USDC.balanceOf(address(this)), 0);
+        emit log_named_uint("USDC bought", USDC.balanceOf(address(this)));
+
+        /*
+            Homework
+            Try the following:
+            * make this UniswapV2 trade go ETH->DAI->USDC
+            * combine multiple trades, e.g Uniswap V2 ETH->USDC and ETH->DAI->USDC
+            * create a UniswapV3 trade
+        */
+    }
+}

contracts/zero-ex/contracts/test/foundry/protocol-academy/3-transformers/TransformERC20Feature.t.sol

@@ -0,0 +1,191 @@
+// SPDX-License-Identifier: Apache-2.0
+/*
+
+  Copyright 2022 ZeroEx Intl.
+
+  Licensed under the Apache License, Version 2.0 (the "License");
+  you may not use this file except in compliance with the License.
+  You may obtain a copy of the License at
+
+    http://www.apache.org/licenses/LICENSE-2.0
+
+  Unless required by applicable law or agreed to in writing, software
+  distributed under the License is distributed on an "AS IS" BASIS,
+  WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+  See the License for the specific language governing permissions and
+  limitations under the License.
+
+*/
+
+pragma solidity ^0.6;
+pragma experimental ABIEncoderV2;
+
+import "../utils/DeployZeroEx.sol";
+import "@0x/contracts-erc20/contracts/src/v06/IEtherTokenV06.sol";
+import "src/features/TransformERC20Feature.sol";
+import "src/external/TransformerDeployer.sol";
+import "src/transformers/WethTransformer.sol";
+import "src/transformers/FillQuoteTransformer.sol";
+
+import "@0x/contracts-erc20/contracts/src/v06/WETH9.sol";
+
+contract TransformERC20FeatureTest is DeployZeroEx {
+    IEtherTokenV06 WETH;
+
+    TransformerDeployer transformerDeployer;
+    WethTransformer wethTransformer;
+    TransformERC20Feature transformERC20Feature;
+
+    function setUp() public {
+        deployZeroEx();
+        // Deploy from bytecode as this is Solidity v5
+        WETH = IEtherTokenV06(deployCode("foundry-artifacts/WETH9.sol/WETH9.json"));
+        emit log_named_address("WETH deployed at", address(WETH));
+    }
+
+    function testMigration()
+        public
+    {
+        // Note there is a lot here, so feel free to comment out further sections
+        // so you can read the logs and traces
+
+        /*
+            Deploy TransformERC20Feature
+        */
+
+        // Create a new TransformerDeployer, which will deploy all future transformers
+        // Owners are typically EOA which are allowed to deploy
+        // For this we will use this current contract address
+        address[] memory owners = new address[](1);
+        owners[0] = address(this);
+        transformerDeployer = new TransformerDeployer(owners);
+        emit log_named_address("TransformerDeployer deployed at", address(transformerDeployer));
+
+
+        transformERC20Feature = new TransformERC20Feature();
+        emit log_named_address("TransformERC20Feature deployed at", address(transformERC20Feature));
+
+        // Migrate 0x EP and initialize the TransformERC20Feature
+        // Remember this performs a delegatecall and registers function selectors
+        //     function migrate(address target, bytes calldata data, address newOwner)
+        IZERO_EX.migrate(
+            address(transformERC20Feature),
+            // Use encodeWithSelector to generate low level call data with the required arguments
+            // <function selector><arg1> 
+            //  The required migration function to call is the following:
+            //     function migrate(address transformerDeployer)
+            //  e.g ce5494bb00000000000000000000000042997ac9251e5bb0a61f4ff790e5b991ea07fd9b
+            //  try: cast calldata 'migrate(address)' '0x42997ac9251e5bb0a61f4ff790e5b991ea07fd9b'
+            abi.encodeWithSelector(transformERC20Feature.migrate.selector, address(transformerDeployer)),
+            address(this)
+        );
+
+        // As part of the migration process a FlashWallet was generated inside of the 0x EP context
+        emit log_named_address("FlashWallet deployed at", address(IZERO_EX.getTransformWallet()));
+        // Homework: Recall why transformERC20Feature.getTransformWallet() returns address(0)
+
+        /*
+            Deploy a WETH transformer
+        */
+
+        // Typically the code to deployed is passed in off-chain, so we will emulate something similar
+        // by using vm.getCode cheatcode.
+        wethTransformer = WethTransformer(transformerDeployer.deploy(
+            abi.encodePacked(
+                // Deploy the WethTransformer code
+                vm.getCode("foundry-artifacts/WethTransformer.sol/WethTransformer.json"),
+                // WethTransformer takes WETH address as a constructor argument
+                abi.encode(address(WETH))
+            )
+        ));
+        assertEq(address(wethTransformer.weth()), address(WETH));
+        emit log_named_address("WethTransformer deployed at", address(IZERO_EX.getTransformWallet()));
+
+        // Not much we can do with just a WethTransformer, I guess we could go ETH->WETH with it
+        // Cheat code to give this contract 1e18 ETH
+        vm.deal(address(this), 1e18);
+        
+        // Deployment nonce is 1 as it is the first contract TransformerDeployer deployed
+        // let's assert that is true
+        assertEq(
+            LibERC20Transformer.getDeployedAddress(address(transformerDeployer), 1),
+            address(wethTransformer)
+        );
+
+        /*
+            Perform a ETH->WETH transformation
+        */
+
+        // Create our list of transformations, this will just have a WethTransformer
+        ITransformERC20Feature.Transformation[] memory transformations = new ITransformERC20Feature.Transformation[](1);
+        transformations[0].deploymentNonce = 1;
+        transformations[0].data = abi.encode(LibERC20Transformer.ETH_TOKEN_ADDRESS, 1e18);
+
+        IZERO_EX.transformERC20{value: 1e18}(
+            // input token
+            IERC20TokenV06(LibERC20Transformer.ETH_TOKEN_ADDRESS),
+            // output token
+            IERC20TokenV06(address(WETH)),
+            // input token amount
+            1e18,
+            // min output token amount
+            1e18,
+            // list of transform
+            transformations
+        );
+        assertEq(WETH.balanceOf(address(this)), 1e18);
+
+        /*
+            Perform a WETH->ETH transformation
+        */
+
+        // Let's go backwards, remember we need to set the approval of WETH to the 0x EP
+        WETH.approve(address(IZERO_EX), uint256(-1));
+        // Override the data in the previous transformation
+        transformations[0].data = abi.encode(address(WETH), 1e18);
+        // Note: No { value } here as it's a token
+        IZERO_EX.transformERC20(
+            // input token
+            IERC20TokenV06(address(WETH)),
+            // output token
+            IERC20TokenV06(LibERC20Transformer.ETH_TOKEN_ADDRESS),
+            // input token amount
+            1e18,
+            // min output token amount
+            1e18,
+            // list of transform
+            transformations
+        );
+
+        /*
+            Deploy FillQuoteTransformer and BridgeAdapter
+        */
+
+        // At this time I would show how to do a ETH->USDC trade
+        // but we need to set up more of the world, or to run in forked mode
+        // with an AMM (find this in BasicSwapForked.t.sol)
+
+        // Instead let's just deploy the FQT and BridgeAdapter and as homework
+        // you might explore running in forked mode and using transformations
+        address bridgeAdapter = deployCode("foundry-artifacts/BridgeAdapter.sol/BridgeAdapter.json", abi.encode(address(WETH)));
+        FillQuoteTransformer fillQuoteTransformer = FillQuoteTransformer(transformerDeployer.deploy(
+            abi.encodePacked(
+                // Deploy the FillQuoteTransformer code
+                vm.getCode("foundry-artifacts/FillQuoteTransformer.sol/FillQuoteTransformer.json"),
+                // FillQuoteTransformer takes the BridgeAdapter and ZeroEx address as arguments
+                abi.encode(bridgeAdapter, address(ZERO_EX))
+            )
+        ));
+        assertEq(address(fillQuoteTransformer.bridgeAdapter()), bridgeAdapter);
+        assertEq(
+            LibERC20Transformer.getDeployedAddress(address(transformerDeployer), 2),
+            address(fillQuoteTransformer)
+        );
+
+    }
+
+    // Note this is needed as the test is a contract, and to receive ETH 
+    // it needs to declare a receive function as per the Solidity requirements
+    receive() external payable {}
+
+}

contracts/zero-ex/contracts/test/foundry/protocol-academy/8-evm/Call.t.sol

@@ -0,0 +1,88 @@
+// SPDX-License-Identifier: Apache-2.0
+/*
+
+  Copyright 2022 ZeroEx Intl.
+
+  Licensed under the Apache License, Version 2.0 (the "License");
+  you may not use this file except in compliance with the License.
+  You may obtain a copy of the License at
+
+    http://www.apache.org/licenses/LICENSE-2.0
+
+  Unless required by applicable law or agreed to in writing, software
+  distributed under the License is distributed on an "AS IS" BASIS,
+  WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+  See the License for the specific language governing permissions and
+  limitations under the License.
+
+*/
+
+pragma solidity ^0.6;
+pragma experimental ABIEncoderV2;
+
+contract Receiver {
+  function receivePure() public pure {
+      1 + 1;
+  }
+
+  function receiveImpure() public {
+      1 + 1;
+  }
+}
+
+contract Empty {
+
+}
+
+contract Call {
+    address empty = address(new Empty());
+    address receiver = address(new Receiver());
+
+    function callUnknown() public {
+      // forge debug contracts/test/foundry/protocol-academy/8-evm/Call.t.sol --sig 'callUnknown()' --tc Call
+
+      // Why didn't this contract make a call out to 0x222... ?
+      // Did solidity add a check for us?
+      Receiver(0x2222222222222222222222222222222222222222).receiveImpure();
+    }
+
+    function callEmpty() public {
+      // forge debug contracts/test/foundry/protocol-academy/8-evm/Call.t.sol --sig 'callEmpty()' --tc Call
+
+      // Observe how the added Solidity checks "pass"
+      // and ultimately how this results in a REVERT
+      Receiver(empty).receiveImpure();
+    }
+
+    function callEmptyRaw() public {
+      // forge debug contracts/test/foundry/protocol-academy/8-evm/Call.t.sol --sig 'callEmptyRaw()' --tc Call
+
+      // Observe this low level call and how it differs from the above
+      // example. Does it revert?
+      empty.call(abi.encodeWithSelector(Receiver.receiveImpure.selector));
+    }
+
+    function callEmptyEOA() public {
+      // forge debug contracts/test/foundry/protocol-academy/8-evm/Call.t.sol --sig 'callEmptyEOA()' --tc Call
+
+      // Observe this low level call and how it differs from the above
+      // example. Does it revert?
+      address(msg.sender).call(abi.encodeWithSelector(Receiver.receiveImpure.selector));
+    }
+
+    function callReceiverImpure() public {
+      // forge debug contracts/test/foundry/protocol-academy/8-evm/Call.t.sol --sig 'callReceiverImpure()' --tc Call
+
+      // Observe how a CALL is set up and then ultimately made
+      // and any checks prior to making the CALL
+      Receiver(receiver).receiveImpure();
+    }
+
+    function callReceiverPure() public {
+      // forge debug contracts/test/foundry/protocol-academy/8-evm/Call.t.sol --sig 'callReceiverPure()' --tc Call
+
+      // Did you notice the different CALL type solidity chose here ?
+      Receiver(receiver).receivePure();
+    }
+
+}

contracts/zero-ex/contracts/test/foundry/protocol-academy/8-evm/Counter.t.sol

@@ -0,0 +1,30 @@
+// SPDX-License-Identifier: Apache-2.0
+/*
+
+  Copyright 2022 ZeroEx Intl.
+
+  Licensed under the Apache License, Version 2.0 (the "License");
+  you may not use this file except in compliance with the License.
+  You may obtain a copy of the License at
+
+    http://www.apache.org/licenses/LICENSE-2.0
+
+  Unless required by applicable law or agreed to in writing, software
+  distributed under the License is distributed on an "AS IS" BASIS,
+  WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+  See the License for the specific language governing permissions and
+  limitations under the License.
+
+*/
+
+pragma solidity ^0.6;
+pragma experimental ABIEncoderV2;
+
+contract Counter {
+    uint256 private data = 1337;
+
+    function increment(uint256 val) public {
+      // forge debug contracts/test/foundry/protocol-academy/8-evm/Counter.t.sol --sig 'increment(uint256)' 10
+      data += val;
+    }
+}

contracts/zero-ex/contracts/test/foundry/protocol-academy/8-evm/Hash.t.sol

@@ -0,0 +1,42 @@
+// SPDX-License-Identifier: Apache-2.0
+/*
+
+  Copyright 2022 ZeroEx Intl.
+
+  Licensed under the Apache License, Version 2.0 (the "License");
+  you may not use this file except in compliance with the License.
+  You may obtain a copy of the License at
+
+    http://www.apache.org/licenses/LICENSE-2.0
+
+  Unless required by applicable law or agreed to in writing, software
+  distributed under the License is distributed on an "AS IS" BASIS,
+  WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+  See the License for the specific language governing permissions and
+  limitations under the License.
+
+*/
+
+pragma solidity ^0.6;
+pragma experimental ABIEncoderV2;
+
+contract Hash {
+    bytes data = hex"42";
+
+    function sha3() public {
+        // forge debug contracts/test/foundry/protocol-academy/8-evm/Hash.sol --sig 'sha3()'
+
+        // Follow the opcodes:
+        //   how does the data get loaded
+        //   which one is keccak256
+        keccak256(data);
+    }
+
+    function sha2() public {
+        // forge debug contracts/test/foundry/protocol-academy/8-evm/Hash.sol --sig 'sha2()'
+
+        // Follow the opcodes:
+        //   why is sha256 so different from keccak256
+        sha256(data);
+    }
+}

contracts/zero-ex/contracts/test/foundry/protocol-academy/8-evm/Memory.t.sol

@@ -0,0 +1,45 @@
+// SPDX-License-Identifier: Apache-2.0
+/*
+
+  Copyright 2022 ZeroEx Intl.
+
+  Licensed under the Apache License, Version 2.0 (the "License");
+  you may not use this file except in compliance with the License.
+  You may obtain a copy of the License at
+
+    http://www.apache.org/licenses/LICENSE-2.0
+
+  Unless required by applicable law or agreed to in writing, software
+  distributed under the License is distributed on an "AS IS" BASIS,
+  WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+  See the License for the specific language governing permissions and
+  limitations under the License.
+
+*/
+
+pragma solidity ^0.6;
+pragma experimental ABIEncoderV2;
+
+contract Memory {
+
+    function expand() public {
+      // forge debug contracts/test/foundry/protocol-academy/8-evm/Memory.t.sol --sig 'expand()'
+
+      // Observe the free memory pointer increase
+      // when more memory is allocated
+      bytes32[3] memory data;
+    }
+
+    function mstore() public {
+      // forge debug contracts/test/foundry/protocol-academy/8-evm/Memory.t.sol --sig 'mstore()'
+
+      // Observe the free memory pointer increase
+      // when more memory is allocated
+      bytes1[4] memory data;
+      // Observe each value being set in the memory
+      // slots
+      data[1] = 0x42;
+      data[0] = 0x0a;
+      data[2] = 0xff;
+    }
+}

contracts/zero-ex/contracts/test/foundry/protocol-academy/utils/DeployZeroEx.sol

@@ -0,0 +1,70 @@
+// SPDX-License-Identifier: Apache-2.0
+/*
+
+  Copyright 2022 ZeroEx Intl.
+
+  Licensed under the Apache License, Version 2.0 (the "License");
+  you may not use this file except in compliance with the License.
+  You may obtain a copy of the License at
+
+    http://www.apache.org/licenses/LICENSE-2.0
+
+  Unless required by applicable law or agreed to in writing, software
+  distributed under the License is distributed on an "AS IS" BASIS,
+  WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+  See the License for the specific language governing permissions and
+  limitations under the License.
+
+*/
+
+pragma solidity ^0.6;
+pragma experimental ABIEncoderV2;
+
+import "forge-std/Test.sol";
+
+import "src/IZeroEx.sol";
+import "src/ZeroEx.sol";
+import "src/migrations/InitialMigration.sol";
+import "src/features/OwnableFeature.sol";
+import "src/features/SimpleFunctionRegistryFeature.sol";
+
+
+contract DeployZeroEx is Test {
+    ZeroEx public ZERO_EX = ZeroEx(0xDef1C0ded9bec7F1a1670819833240f027b25EfF);
+    IZeroEx public IZERO_EX = IZeroEx(0xDef1C0ded9bec7F1a1670819833240f027b25EfF);
+
+    function deployZeroEx()
+        internal
+    {
+        // HERE BE DRAGONS, feel free to ignore this for now
+        // We want to deploy the ZeroEx contract, at 0xDef1C0ded9bec7F1a1670819833240f027b25EfF
+
+        // We use a special mechanism to deploy the ZeroEx contract.
+        InitialMigration initialMigration = InitialMigration(deployCode(
+            "foundry-artifacts/InitialMigration.sol/InitialMigration.json",
+            abi.encode(address(this))
+        ));
+        // Must occur from this address as the first transaction
+        hoax(0xe750ad66DE350F8110E305fb78Ec6A9f594445E3);
+        // Special Deployer code
+        bytes memory deployerBytecode = hex"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";
+        // Grab the bytecode of the ZeroEx artifact
+        bytes memory zeroExBytecode = vm.getCode("foundry-artifacts/ZeroEx.sol/ZeroEx.json");
+        // Append the required ZeroEx constructor arguments (address bootstrapper)
+        bytes memory zeroExDeploycode = abi.encodePacked(zeroExBytecode, abi.encode(initialMigration));
+        // Append the required deployer code constructor arguments (bytes initCode)
+        bytes memory deployerDeploycode = abi.encodePacked(deployerBytecode, abi.encode(zeroExDeploycode));
+        // The address is technically emitted in an event, but we know we did it correctly
+        //│   │   ├─  emit topic 0: 0xf40fcec21964ffb566044d083b4073f29f7f7929110ea19e1b3ebe375d89055e
+        //│   │   │           data: 0x000000000000000000000000def1c0ded9bec7f1a1670819833240f027b25eff
+        assembly {
+            pop(create(0, add(deployerDeploycode, 0x20), mload(deployerDeploycode)))
+        }
+
+        initialMigration.initializeZeroEx(
+            payable(address(this)),
+            ZERO_EX,
+            InitialMigration.BootstrapFeatures({ registry: new SimpleFunctionRegistryFeature(), ownable: new OwnableFeature()})
+        );
+    }
+}

contracts/zero-ex/contracts/test/foundry/protocol-academy/utils/ForkUtils.sol

@@ -0,0 +1,36 @@
+// SPDX-License-Identifier: Apache-2.0
+/*
+
+  Copyright 2022 ZeroEx Intl.
+
+  Licensed under the Apache License, Version 2.0 (the "License");
+  you may not use this file except in compliance with the License.
+  You may obtain a copy of the License at
+
+    http://www.apache.org/licenses/LICENSE-2.0
+
+  Unless required by applicable law or agreed to in writing, software
+  distributed under the License is distributed on an "AS IS" BASIS,
+  WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+  See the License for the specific language governing permissions and
+  limitations under the License.
+
+*/
+
+pragma solidity ^0.6;
+pragma experimental ABIEncoderV2;
+
+import "forge-std/Test.sol";
+
+
+contract ForkUtils is Test {
+    /// Only run this function if the block number
+    // is greater than some constant for Ethereum Mainnet
+    modifier onlyForked {
+        if (block.number >= 14206900) {
+            _;
+        } else {
+            emit log_string("Requires fork mode, skipping");
+        }
+    }
+}

contracts/zero-ex/contracts/test/foundry/protocol-academy/utils/TestUtils.sol

@@ -0,0 +1,79 @@
+// SPDX-License-Identifier: Apache-2.0
+/*
+
+  Copyright 2022 ZeroEx Intl.
+
+  Licensed under the Apache License, Version 2.0 (the "License");
+  you may not use this file except in compliance with the License.
+  You may obtain a copy of the License at
+
+    http://www.apache.org/licenses/LICENSE-2.0
+
+  Unless required by applicable law or agreed to in writing, software
+  distributed under the License is distributed on an "AS IS" BASIS,
+  WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+  See the License for the specific language governing permissions and
+  limitations under the License.
+
+*/
+
+pragma solidity ^0.6;
+pragma experimental ABIEncoderV2;
+
+import "forge-std/Test.sol";
+
+import "src/transformers/LibERC20Transformer.sol";
+
+contract TestUtils is Test {
+    uint256 private constant MAX_UINT256_STRING_LENGTH = 78;
+    uint8 private constant ASCII_DIGIT_OFFSET = 48;
+
+    function _toString(uint256 n) 
+        internal 
+        pure 
+        returns (string memory nstr) 
+    {
+        if (n == 0) {
+            return "0";
+        }
+        // Overallocate memory
+        nstr = new string(MAX_UINT256_STRING_LENGTH);
+        uint256 k = MAX_UINT256_STRING_LENGTH;
+        // Populate string from right to left (lsb to msb).
+        while (n != 0) {
+            assembly {
+                let char := add(
+                    ASCII_DIGIT_OFFSET,
+                    mod(n, 10)
+                )
+                mstore(add(nstr, k), char)
+                k := sub(k, 1)
+                n := div(n, 10)
+            }
+        }
+        assembly {
+            // Shift pointer over to actual start of string.
+            nstr := add(nstr, k)
+            // Store actual string length.
+            mstore(nstr, sub(MAX_UINT256_STRING_LENGTH, k))
+        }
+        return nstr;
+    }    
+
+    function _findTransformerNonce(
+        address transformer,
+        address deployer
+    )
+        internal
+        pure
+        returns (uint32)
+    {
+        address current;
+        for (uint32 i = 0; i < 1024; i++) {
+            current = LibERC20Transformer.getDeployedAddress(deployer, i);
+            if (current == transformer) {
+                return i;
+            }
+        }
+    }
+}

contracts/zero-ex/foundry.toml

@@ -0,0 +1,8 @@
+[default]
+src = 'contracts/src'
+out = 'foundry-artifacts'
+test = 'contracts/test/foundry'
+libs = ["../utils/contracts/src/", "contracts/deps/"]
+remappings = ['@0x/contracts-utils/=../utils/', '@0x/contracts-erc20/=../erc20/', 'src/=./contracts/src']
+cache_path = 'foundry-cache'
+optimizer_runs = 1000000

contracts/zero-ex/package.json

@@ -38,7 +38,8 @@
         "docs:md": "ts-doc-gen --sourceDir='$PROJECT_FILES' --output=$MD_FILE_DIR --fileExtension=mdx --tsconfig=./typedoc-tsconfig.json",
         "docs:json": "typedoc --excludePrivate --excludeExternals --excludeProtected --ignoreCompilerErrors --target ES5 --tsconfig typedoc-tsconfig.json --json $JSON_FILE_PATH $PROJECT_FILES",
         "publish:private": "yarn build && gitpkg publish",
-        "rollback": "node ./lib/scripts/rollback.js"
+        "rollback": "node ./lib/scripts/rollback.js",
+        "typechain": "typechain --target=ethers-v5 --out-dir='typechain-wrappers'  './foundry-artifacts/**/*.json'"
     },
     "config": {
         "publicInterfaceContracts": "IZeroEx,ZeroEx,FullMigration,InitialMigration,IFlashWallet,IERC20Transformer,IOwnableFeature,ISimpleFunctionRegistryFeature,ITransformERC20Feature,FillQuoteTransformer,PayTakerTransformer,PositiveSlippageFeeTransformer,WethTransformer,OwnableFeature,SimpleFunctionRegistryFeature,TransformERC20Feature,AffiliateFeeTransformer,MetaTransactionsFeature,LogMetadataTransformer,BridgeAdapter,LiquidityProviderFeature,ILiquidityProviderFeature,NativeOrdersFeature,INativeOrdersFeature,FeeCollectorController,FeeCollector,CurveLiquidityProvider,BatchFillNativeOrdersFeature,IBatchFillNativeOrdersFeature,MultiplexFeature,IMultiplexFeature,OtcOrdersFeature,IOtcOrdersFeature",
@@ -65,6 +66,7 @@
         "@0x/sol-compiler": "^4.8.1",
         "@0x/ts-doc-gen": "^0.0.28",
         "@0x/tslint-config": "^4.1.4",
+        "@typechain/ethers-v5": "^10.0.0",
         "@types/isomorphic-fetch": "^0.0.35",
         "@types/lodash": "4.14.104",
         "@types/mocha": "^5.2.7",
@@ -78,6 +80,7 @@
         "solhint": "^1.4.1",
         "truffle": "^5.0.32",
         "tslint": "5.11.0",
+        "typechain": "^8.0.0",
         "typedoc": "~0.16.11",
         "typescript": "4.6.3"
     },

yarn.lock

@@ -2683,6 +2683,14 @@
   dependencies:
     defer-to-connect "^1.0.1"
 
+"@typechain/ethers-v5@^10.0.0":
+  version "10.0.0"
+  resolved "https://registry.yarnpkg.com/@typechain/ethers-v5/-/ethers-v5-10.0.0.tgz#1b6e292d2ed9afb0d2f7a4674cc199bb95bad714"
+  integrity sha512-Kot7fwAqnH96ZbI8xrRgj5Kpv9yCEdjo7mxRqrH7bYpEgijT5MmuOo8IVsdhOu7Uog4ONg7k/d5UdbAtTKUgsA==
+  dependencies:
+    lodash "^4.17.15"
+    ts-essentials "^7.0.1"
+
 "@types/bn.js@^4.11.0", "@types/bn.js@^4.11.3", "@types/bn.js@^4.11.4", "@types/bn.js@^4.11.5":
   version "4.11.6"
   resolved "https://registry.yarnpkg.com/@types/bn.js/-/bn.js-4.11.6.tgz#c306c70d9358aaea33cd4eda092a742b9505967c"
@@ -2827,6 +2835,11 @@
   dependencies:
     "@types/node" "*"
 
+"@types/prettier@^2.1.1":
+  version "2.6.1"
+  resolved "https://registry.yarnpkg.com/@types/prettier/-/prettier-2.6.1.tgz#76e72d8a775eef7ce649c63c8acae1a0824bbaed"
+  integrity sha512-XFjFHmaLVifrAKaZ+EKghFHtHSUonyw8P2Qmy2/+osBnrKbH9UYtlK10zg8/kCt47MFilll/DEDKy3DHfJ0URw==
+
 "@types/prompts@^2.0.9":
   version "2.0.9"
   resolved "https://registry.yarnpkg.com/@types/prompts/-/prompts-2.0.9.tgz#19f419310eaa224a520476b19d4183f6a2b3bd8f"
@@ -2934,7 +2947,7 @@ abstract-leveldown@3.0.0:
   dependencies:
     xtend "~4.0.0"
 
-abstract-leveldown@^2.4.1:
+abstract-leveldown@^2.4.1, abstract-leveldown@~2.7.1:
   version "2.7.2"
   resolved "https://registry.yarnpkg.com/abstract-leveldown/-/abstract-leveldown-2.7.2.tgz#87a44d7ebebc341d59665204834c8b7e0932cc93"
   dependencies:
@@ -2946,6 +2959,13 @@ abstract-leveldown@^5.0.0, abstract-leveldown@~5.0.0:
   dependencies:
     xtend "~4.0.0"
 
+abstract-leveldown@~2.6.0:
+  version "2.6.3"
+  resolved "https://registry.yarnpkg.com/abstract-leveldown/-/abstract-leveldown-2.6.3.tgz#1c5e8c6a5ef965ae8c35dfb3a8770c476b82c4b8"
+  integrity sha512-2++wDf/DYqkPR3o5tbfdhF96EfMApo1GpPfzOsR/ZYXdkSmELlvOOEAl9iKkRsktMPHdGjO4rtkBpf2I7TiTeA==
+  dependencies:
+    xtend "~4.0.0"
+
 accepts@~1.3.7:
   version "1.3.7"
   resolved "https://registry.yarnpkg.com/accepts/-/accepts-1.3.7.tgz#531bc726517a3b2b41f850021c6cc15eaab507cd"
@@ -3128,6 +3148,16 @@ arr-union@^3.1.0:
   version "3.1.0"
   resolved "https://registry.yarnpkg.com/arr-union/-/arr-union-3.1.0.tgz#e39b09aea9def866a8f206e288af63919bae39c4"
 
+array-back@^3.0.1, array-back@^3.1.0:
+  version "3.1.0"
+  resolved "https://registry.yarnpkg.com/array-back/-/array-back-3.1.0.tgz#b8859d7a508871c9a7b2cf42f99428f65e96bfb0"
+  integrity sha512-TkuxA4UCOvxuDK6NZYXCalszEzj+TLszyASooky+i742l9TqsOdYCMJJupxRic61hwquNtppB3hgcuq9SVSH1Q==
+
+array-back@^4.0.1, array-back@^4.0.2:
+  version "4.0.2"
+  resolved "https://registry.yarnpkg.com/array-back/-/array-back-4.0.2.tgz#8004e999a6274586beeb27342168652fdb89fa1e"
+  integrity sha512-NbdMezxqf94cnNfWLL7V/im0Ub+Anbb0IoZhvzie8+4HJ4nMQuzHuy49FkGYCJK2yAloZ3meiB6AVMClbrI1vg==
+
 array-differ@^2.0.3:
   version "2.1.0"
   resolved "https://registry.yarnpkg.com/array-differ/-/array-differ-2.1.0.tgz#4b9c1c3f14b906757082925769e8ab904f4801b1"
@@ -3230,7 +3260,7 @@ async-limiter@~1.0.0:
   version "1.0.1"
   resolved "https://registry.yarnpkg.com/async-limiter/-/async-limiter-1.0.1.tgz#dd379e94f0db8310b08291f9d64c3209766617fd"
 
-async@1.x:
+async@1.x, async@^1.4.2:
   version "1.5.2"
   resolved "https://registry.yarnpkg.com/async/-/async-1.5.2.tgz#ec6a61ae56480c0c3cb241c95618e20892f9672a"
 
@@ -3815,11 +3845,21 @@ bigi@1.4.2, bigi@^1.1.0:
   version "1.4.2"
   resolved "https://registry.yarnpkg.com/bigi/-/bigi-1.4.2.tgz#9c665a95f88b8b08fc05cfd731f561859d725825"
 
-bignumber.js@7.2.1, bignumber.js@^9.0.0, bignumber.js@^9.0.2, bignumber.js@~4.1.0, bignumber.js@~9.0.0, bignumber.js@~9.0.2:
+bignumber.js@7.2.1:
+  version "7.2.1"
+  resolved "https://registry.yarnpkg.com/bignumber.js/-/bignumber.js-7.2.1.tgz#80c048759d826800807c4bfd521e50edbba57a5f"
+  integrity sha512-S4XzBk5sMB+Rcb/LNcpzXr57VRTxgAvaAEDAl1AwRx27j00hT84O6OkteE7u8UB3NuaaygCRrEpqox4uDOrbdQ==
+
+bignumber.js@^9.0.0, bignumber.js@~9.0.0, bignumber.js@~9.0.2:
   version "9.0.2"
   resolved "https://registry.yarnpkg.com/bignumber.js/-/bignumber.js-9.0.2.tgz#71c6c6bed38de64e24a65ebe16cfcf23ae693673"
   integrity sha512-GAcQvbpsM0pUb0zw1EI0KhQEZ+lRwR5fYaAp3vPOYuP7aDvGy6cVN6XHLauvF8SOga2y0dcLcjt3iQDTSEliyw==
 
+bignumber.js@~4.1.0:
+  version "4.1.0"
+  resolved "https://registry.yarnpkg.com/bignumber.js/-/bignumber.js-4.1.0.tgz#db6f14067c140bd46624815a7916c92d9b6c24b1"
+  integrity sha512-eJzYkFYy9L4JzXsbymsFn3p54D+llV27oTQ+ziJG7WFRheJcNZilgVXMG0LoZtlQSKBsJdWtLFqOD0u+U0jZKA==
+
 binary-extensions@^2.0.0:
   version "2.1.0"
   resolved "https://registry.yarnpkg.com/binary-extensions/-/binary-extensions-2.1.0.tgz#30fa40c9e7fe07dbc895678cd287024dea241dd9"
@@ -4326,6 +4366,14 @@ chalk@^4.0.0:
     ansi-styles "^4.1.0"
     supports-color "^7.1.0"
 
+chalk@^4.1.0:
+  version "4.1.2"
+  resolved "https://registry.yarnpkg.com/chalk/-/chalk-4.1.2.tgz#aac4e2b7734a740867aeb16bf02aad556a1e7a01"
+  integrity sha512-oKnbhFyRIXpUuez8iBMmyEa4nbj4IOQyuhc/wy9kY7/WVPcwIO9VA668Pu8RkO7+0G76SLROeyw9CpQ061i4mA==
+  dependencies:
+    ansi-styles "^4.1.0"
+    supports-color "^7.1.0"
+
 change-case@^3.0.2:
   version "3.1.0"
   resolved "https://registry.yarnpkg.com/change-case/-/change-case-3.1.0.tgz#0e611b7edc9952df2e8513b27b42de72647dd17e"
@@ -4589,6 +4637,26 @@ command-exists@^1.2.8:
   version "1.2.9"
   resolved "https://registry.yarnpkg.com/command-exists/-/command-exists-1.2.9.tgz#c50725af3808c8ab0260fd60b01fbfa25b954f69"
 
+command-line-args@^5.1.1:
+  version "5.2.1"
+  resolved "https://registry.yarnpkg.com/command-line-args/-/command-line-args-5.2.1.tgz#c44c32e437a57d7c51157696893c5909e9cec42e"
+  integrity sha512-H4UfQhZyakIjC74I9d34fGYDwk3XpSr17QhEd0Q3I9Xq1CETHo4Hcuo87WyWHpAF1aSLjLRf5lD9ZGX2qStUvg==
+  dependencies:
+    array-back "^3.1.0"
+    find-replace "^3.0.0"
+    lodash.camelcase "^4.3.0"
+    typical "^4.0.0"
+
+command-line-usage@^6.1.0:
+  version "6.1.3"
+  resolved "https://registry.yarnpkg.com/command-line-usage/-/command-line-usage-6.1.3.tgz#428fa5acde6a838779dfa30e44686f4b6761d957"
+  integrity sha512-sH5ZSPr+7UStsloltmDh7Ce5fb8XPlHyoPzTpyyMuYCtervL65+ubVZ6Q61cFtFl62UyJlc8/JwERRbAFPUqgw==
+  dependencies:
+    array-back "^4.0.2"
+    chalk "^2.4.2"
+    table-layout "^1.0.2"
+    typical "^5.2.0"
+
 commander@2.18.0:
   version "2.18.0"
   resolved "https://registry.yarnpkg.com/commander/-/commander-2.18.0.tgz#2bf063ddee7c7891176981a2cc798e5754bc6970"
@@ -5019,6 +5087,13 @@ debug@^4.0.1:
   dependencies:
     ms "2.1.2"
 
+debug@^4.3.1:
+  version "4.3.4"
+  resolved "https://registry.yarnpkg.com/debug/-/debug-4.3.4.tgz#1319f6579357f2338d3337d2cdd4914bb5dcc865"
+  integrity sha512-PRWFHuSU3eDtQJPvnNY7Jcket1j0t5OuOsFzPPzsekD52Zl8qUfFIPEiswXqIvHWGVHOgX+7G/vCNNhehwxfkQ==
+  dependencies:
+    ms "2.1.2"
+
 debuglog@^1.0.1:
   version "1.0.1"
   resolved "https://registry.yarnpkg.com/debuglog/-/debuglog-1.0.1.tgz#aa24ffb9ac3df9a2351837cfb2d279360cd78492"
@@ -5127,7 +5202,7 @@ deep-equal@~1.1.1:
     object-keys "^1.1.1"
     regexp.prototype.flags "^1.2.0"
 
-deep-extend@^0.6.0:
+deep-extend@^0.6.0, deep-extend@~0.6.0:
   version "0.6.0"
   resolved "https://registry.yarnpkg.com/deep-extend/-/deep-extend-0.6.0.tgz#c4fa7c95404a17a9c3e8ca7e1537312b736330ac"
 
@@ -5151,6 +5226,13 @@ defer-to-connect@^1.0.1:
   version "1.1.3"
   resolved "https://registry.yarnpkg.com/defer-to-connect/-/defer-to-connect-1.1.3.tgz#331ae050c08dcf789f8c83a7b81f0ed94f4ac591"
 
+deferred-leveldown@~1.2.1:
+  version "1.2.2"
+  resolved "https://registry.yarnpkg.com/deferred-leveldown/-/deferred-leveldown-1.2.2.tgz#3acd2e0b75d1669924bc0a4b642851131173e1eb"
+  integrity sha512-uukrWD2bguRtXilKt6cAWKyoXrTSMo5m7crUdLfWQmu8kIm88w3QZoUL+6nhpfKVmhHANER6Re3sKoNoZ3IKMA==
+  dependencies:
+    abstract-leveldown "~2.6.0"
+
 deferred-leveldown@~4.0.0:
   version "4.0.2"
   resolved "https://registry.yarnpkg.com/deferred-leveldown/-/deferred-leveldown-4.0.2.tgz#0b0570087827bf480a23494b398f04c128c19a20"
@@ -6484,6 +6566,13 @@ find-cache-dir@^0.1.1:
     mkdirp "^0.5.1"
     pkg-dir "^1.0.0"
 
+find-replace@^3.0.0:
+  version "3.0.0"
+  resolved "https://registry.yarnpkg.com/find-replace/-/find-replace-3.0.0.tgz#3e7e23d3b05167a76f770c9fbd5258b0def68c38"
+  integrity sha512-6Tb2myMioCAgv5kfvP5/PkZZ/ntTpVK39fHY7WkWBgvbeE+VHd/tZuZ4mrC+bxh4cfOZeYKVPaJIZtZXV7GNCQ==
+  dependencies:
+    array-back "^3.0.1"
+
 find-up@3.0.0, find-up@^3.0.0:
   version "3.0.0"
   resolved "https://registry.yarnpkg.com/find-up/-/find-up-3.0.0.tgz#49169f1d7993430646da61ecc5ae355c21c97b73"
@@ -6638,7 +6727,7 @@ fs-extra@^4.0.2, fs-extra@^4.0.3:
     jsonfile "^4.0.0"
     universalify "^0.1.0"
 
-fs-extra@^7.0.1:
+fs-extra@^7.0.0, fs-extra@^7.0.1:
   version "7.0.1"
   resolved "https://registry.yarnpkg.com/fs-extra/-/fs-extra-7.0.1.tgz#4f189c44aa123b895f722804f55ea23eadc348e9"
   dependencies:
@@ -6978,6 +7067,18 @@ glob@7.1.6, glob@^7.0.0, glob@^7.0.3, glob@^7.0.6, glob@^7.1.1, glob@^7.1.2, glo
     once "^1.3.0"
     path-is-absolute "^1.0.0"
 
+glob@7.1.7:
+  version "7.1.7"
+  resolved "https://registry.yarnpkg.com/glob/-/glob-7.1.7.tgz#3b193e9233f01d42d0b3f78294bbeeb418f94a90"
+  integrity sha512-OvD9ENzPLbegENnYP5UUfJIirTg4+XwMWGaQfQTY0JenxNvvIKP3U3/tAQSPIu/lHxXYSZmpXlUHeqAIdKzBLQ==
+  dependencies:
+    fs.realpath "^1.0.0"
+    inflight "^1.0.4"
+    inherits "2"
+    minimatch "^3.0.4"
+    once "^1.3.0"
+    path-is-absolute "^1.0.0"
+
 glob@^5.0.15:
   version "5.0.15"
   resolved "https://registry.yarnpkg.com/glob/-/glob-5.0.15.tgz#1bc936b9e02f4a603fcc222ecf7633d30b8b93b1"
@@ -7379,6 +7480,11 @@ ignore@^4.0.3, ignore@^4.0.6:
   version "4.0.6"
   resolved "https://registry.yarnpkg.com/ignore/-/ignore-4.0.6.tgz#750e3db5862087b4737ebac8207ffd1ef27b25fc"
 
+immediate@^3.2.3:
+  version "3.3.0"
+  resolved "https://registry.yarnpkg.com/immediate/-/immediate-3.3.0.tgz#1aef225517836bcdf7f2a2de2600c79ff0269266"
+  integrity sha512-HR7EVodfFUdQCTIeySw+WDRFJlPcLOJbXfwwZ7Oom6tjsvZ3bOkCDJHehQC3nxJrv7+f9XecwazynjU8e4Vw3Q==
+
 immediate@~3.2.3:
   version "3.2.3"
   resolved "https://registry.yarnpkg.com/immediate/-/immediate-3.2.3.tgz#d140fa8f614659bd6541233097ddaac25cdd991c"
@@ -8239,12 +8345,31 @@ level-codec@^9.0.0:
   dependencies:
     buffer "^5.6.0"
 
+level-codec@~7.0.0:
+  version "7.0.1"
+  resolved "https://registry.yarnpkg.com/level-codec/-/level-codec-7.0.1.tgz#341f22f907ce0f16763f24bddd681e395a0fb8a7"
+  integrity sha512-Ua/R9B9r3RasXdRmOtd+t9TCOEIIlts+TN/7XTT2unhDaL6sJn83S3rUyljbr6lVtw49N3/yA0HHjpV6Kzb2aQ==
+
+level-errors@^1.0.3:
+  version "1.1.2"
+  resolved "https://registry.yarnpkg.com/level-errors/-/level-errors-1.1.2.tgz#4399c2f3d3ab87d0625f7e3676e2d807deff404d"
+  integrity sha512-Sw/IJwWbPKF5Ai4Wz60B52yj0zYeqzObLh8k1Tk88jVmD51cJSKWSYpRyhVIvFzZdvsPqlH5wfhp/yxdsaQH4w==
+  dependencies:
+    errno "~0.1.1"
+
 level-errors@^2.0.0, level-errors@~2.0.0:
   version "2.0.1"
   resolved "https://registry.yarnpkg.com/level-errors/-/level-errors-2.0.1.tgz#2132a677bf4e679ce029f517c2f17432800c05c8"
   dependencies:
     errno "~0.1.1"
 
+level-errors@~1.0.3:
+  version "1.0.5"
+  resolved "https://registry.yarnpkg.com/level-errors/-/level-errors-1.0.5.tgz#83dbfb12f0b8a2516bdc9a31c4876038e227b859"
+  integrity sha512-/cLUpQduF6bNrWuAC4pwtUKA5t669pCsCi2XbmojG2tFeOr9j6ShtdDCtFFQO1DRt+EVZhx9gPzP9G2bUaG4ig==
+  dependencies:
+    errno "~0.1.1"
+
 level-iterator-stream@^2.0.3:
   version "2.0.3"
   resolved "https://registry.yarnpkg.com/level-iterator-stream/-/level-iterator-stream-2.0.3.tgz#ccfff7c046dcf47955ae9a86f46dfa06a31688b4"
@@ -8253,6 +8378,16 @@ level-iterator-stream@^2.0.3:
     readable-stream "^2.0.5"
     xtend "^4.0.0"
 
+level-iterator-stream@~1.3.0:
+  version "1.3.1"
+  resolved "https://registry.yarnpkg.com/level-iterator-stream/-/level-iterator-stream-1.3.1.tgz#e43b78b1a8143e6fa97a4f485eb8ea530352f2ed"
+  integrity sha1-5Dt4sagUPm+pek9IXrjqUwNS8u0=
+  dependencies:
+    inherits "^2.0.1"
+    level-errors "^1.0.3"
+    readable-stream "^1.0.33"
+    xtend "^4.0.0"
+
 level-iterator-stream@~3.0.0:
   version "3.0.1"
   resolved "https://registry.yarnpkg.com/level-iterator-stream/-/level-iterator-stream-3.0.1.tgz#2c98a4f8820d87cdacab3132506815419077c730"
@@ -8296,6 +8431,14 @@ level-sublevel@6.6.4:
     typewiselite "~1.0.0"
     xtend "~4.0.0"
 
+level-ws@0.0.0:
+  version "0.0.0"
+  resolved "https://registry.yarnpkg.com/level-ws/-/level-ws-0.0.0.tgz#372e512177924a00424b0b43aef2bb42496d228b"
+  integrity sha1-Ny5RIXeSSgBCSwtDrvK7QkltIos=
+  dependencies:
+    readable-stream "~1.0.15"
+    xtend "~2.1.1"
+
 level-ws@^1.0.0:
   version "1.0.0"
   resolved "https://registry.yarnpkg.com/level-ws/-/level-ws-1.0.0.tgz#19a22d2d4ac57b18cc7c6ecc4bd23d899d8f603b"
@@ -8313,6 +8456,19 @@ levelup@3.1.1, levelup@^3.0.0:
     level-iterator-stream "~3.0.0"
     xtend "~4.0.0"
 
+levelup@^1.2.1:
+  version "1.3.9"
+  resolved "https://registry.yarnpkg.com/levelup/-/levelup-1.3.9.tgz#2dbcae845b2bb2b6bea84df334c475533bbd82ab"
+  integrity sha512-VVGHfKIlmw8w1XqpGOAGwq6sZm2WwWLmlDcULkKWQXEA5EopA8OBNJ2Ck2v6bdk8HeEZSbCSEgzXadyQFm76sQ==
+  dependencies:
+    deferred-leveldown "~1.2.1"
+    level-codec "~7.0.0"
+    level-errors "~1.0.3"
+    level-iterator-stream "~1.3.0"
+    prr "~1.0.1"
+    semver "~5.4.1"
+    xtend "~4.0.0"
+
 levn@^0.3.0, levn@~0.3.0:
   version "0.3.0"
   resolved "https://registry.yarnpkg.com/levn/-/levn-0.3.0.tgz#3b09924edf9f083c0490fdd4c0bc4421e04764ee"
@@ -8392,6 +8548,11 @@ lodash._reinterpolate@^3.0.0:
   version "3.0.0"
   resolved "https://registry.yarnpkg.com/lodash._reinterpolate/-/lodash._reinterpolate-3.0.0.tgz#0ccf2d89166af03b3663c796538b75ac6e114d9d"
 
+lodash.camelcase@^4.3.0:
+  version "4.3.0"
+  resolved "https://registry.yarnpkg.com/lodash.camelcase/-/lodash.camelcase-4.3.0.tgz#b28aa6288a2b9fc651035c7711f65ab6190331a6"
+  integrity sha1-soqmKIorn8ZRA1x3EfZathkDMaY=
+
 lodash.clonedeep@^4.5.0:
   version "4.5.0"
   resolved "https://registry.yarnpkg.com/lodash.clonedeep/-/lodash.clonedeep-4.5.0.tgz#e23f3f9c4f8fbdde872529c1071857a086e5ccef"
@@ -8679,6 +8840,18 @@ mem@^4.0.0:
     mimic-fn "^2.0.0"
     p-is-promise "^2.0.0"
 
+memdown@^1.0.0:
+  version "1.4.1"
+  resolved "https://registry.yarnpkg.com/memdown/-/memdown-1.4.1.tgz#b4e4e192174664ffbae41361aa500f3119efe215"
+  integrity sha1-tOThkhdGZP+65BNhqlAPMRnv4hU=
+  dependencies:
+    abstract-leveldown "~2.7.1"
+    functional-red-black-tree "^1.0.1"
+    immediate "^3.2.3"
+    inherits "~2.0.1"
+    ltgt "~2.2.0"
+    safe-buffer "~5.1.1"
+
 memdown@~3.0.0:
   version "3.0.0"
   resolved "https://registry.yarnpkg.com/memdown/-/memdown-3.0.0.tgz#93aca055d743b20efc37492e9e399784f2958309"
@@ -8753,7 +8926,7 @@ merge2@^1.2.3:
   version "1.4.1"
   resolved "https://registry.yarnpkg.com/merge2/-/merge2-1.4.1.tgz#4368892f885e907455a6fd7dc55c0c9d404990ae"
 
-merkle-patricia-tree@3.0.0, merkle-patricia-tree@^2.1.2, merkle-patricia-tree@^2.3.2:
+merkle-patricia-tree@3.0.0:
   version "3.0.0"
   resolved "https://registry.yarnpkg.com/merkle-patricia-tree/-/merkle-patricia-tree-3.0.0.tgz#448d85415565df72febc33ca362b8b614f5a58f8"
   dependencies:
@@ -8765,6 +8938,20 @@ merkle-patricia-tree@3.0.0, merkle-patricia-tree@^2.1.2, merkle-patricia-tree@^2
     rlp "^2.0.0"
     semaphore ">=1.0.1"
 
+merkle-patricia-tree@^2.1.2, merkle-patricia-tree@^2.3.2:
+  version "2.3.2"
+  resolved "https://registry.yarnpkg.com/merkle-patricia-tree/-/merkle-patricia-tree-2.3.2.tgz#982ca1b5a0fde00eed2f6aeed1f9152860b8208a"
+  integrity sha512-81PW5m8oz/pz3GvsAwbauj7Y00rqm81Tzad77tHBwU7pIAtN+TJnMSOJhxBKflSVYhptMMb9RskhqHqrSm1V+g==
+  dependencies:
+    async "^1.4.2"
+    ethereumjs-util "^5.0.0"
+    level-ws "0.0.0"
+    levelup "^1.2.1"
+    memdown "^1.0.0"
+    readable-stream "^2.0.0"
+    rlp "^2.0.0"
+    semaphore ">=1.0.1"
+
 methods@~1.1.2:
   version "1.1.2"
   resolved "https://registry.yarnpkg.com/methods/-/methods-1.1.2.tgz#5529a4d67654134edcc5266656835b0f851afcee"
@@ -8943,7 +9130,7 @@ mkdirp-promise@^5.0.1:
   dependencies:
     mkdirp "*"
 
-mkdirp@*, mkdirp@^1.0.3:
+mkdirp@*, mkdirp@^1.0.3, mkdirp@^1.0.4:
   version "1.0.4"
   resolved "https://registry.yarnpkg.com/mkdirp/-/mkdirp-1.0.4.tgz#3eb5ed62622756d79a5f0e2a221dfebad75c2f7e"
 
@@ -10101,6 +10288,11 @@ prettier@^2.0.5:
   version "2.1.2"
   resolved "https://registry.yarnpkg.com/prettier/-/prettier-2.1.2.tgz#3050700dae2e4c8b67c4c3f666cdb8af405e1ce5"
 
+prettier@^2.3.1:
+  version "2.6.2"
+  resolved "https://registry.yarnpkg.com/prettier/-/prettier-2.6.2.tgz#e26d71a18a74c3d0f0597f55f01fb6c06c206032"
+  integrity sha512-PkUpF+qoXTqhOeWL9fu7As8LXsIUZ1WYaJiY/a7McAQzxjk82OF0tibkFXVCDImZtWxbvojFjerkiLb0/q8mew==
+
 pretty-bytes@^1.0.4:
   version "1.0.4"
   resolved "https://registry.yarnpkg.com/pretty-bytes/-/pretty-bytes-1.0.4.tgz#0a22e8210609ad35542f8c8d5d2159aff0751c84"
@@ -10533,7 +10725,7 @@ read@1, read@1.0.x, read@~1.0.1, read@~1.0.5:
     string_decoder "^1.1.1"
     util-deprecate "^1.0.1"
 
-"readable-stream@>=1.0.33-1 <1.1.0-0", readable-stream@~1.0.26:
+"readable-stream@>=1.0.33-1 <1.1.0-0", readable-stream@~1.0.15, readable-stream@~1.0.26:
   version "1.0.34"
   resolved "https://registry.yarnpkg.com/readable-stream/-/readable-stream-1.0.34.tgz#125820e34bc842d2f2aaafafe4c2916ee32c157c"
   dependencies:
@@ -10542,7 +10734,7 @@ read@1, read@1.0.x, read@~1.0.1, read@~1.0.5:
     isarray "0.0.1"
     string_decoder "~0.10.x"
 
-readable-stream@~1.1.9:
+readable-stream@^1.0.33, readable-stream@~1.1.9:
   version "1.1.14"
   resolved "https://registry.yarnpkg.com/readable-stream/-/readable-stream-1.1.14.tgz#7cf4c54ef648e3813084c636dd2079e166c081d9"
   dependencies:
@@ -10599,6 +10791,11 @@ redent@^3.0.0:
     indent-string "^4.0.0"
     strip-indent "^3.0.0"
 
+reduce-flatten@^2.0.0:
+  version "2.0.0"
+  resolved "https://registry.yarnpkg.com/reduce-flatten/-/reduce-flatten-2.0.0.tgz#734fd84e65f375d7ca4465c69798c25c9d10ae27"
+  integrity sha512-EJ4UNY/U1t2P/2k6oqotuX2Cc3T6nxJwsM0N0asT7dhrtH1ltUxDn4NalSYmPE2rCkVpcf/X6R0wDwcFpzhd4w==
+
 regenerate@^1.2.1:
   version "1.4.1"
   resolved "https://registry.yarnpkg.com/regenerate/-/regenerate-1.4.1.tgz#cad92ad8e6b591773485fbe05a485caf4f457e6f"
@@ -11006,6 +11203,11 @@ semver@^7.3.4:
   dependencies:
     lru-cache "^6.0.0"
 
+semver@~5.4.1:
+  version "5.4.1"
+  resolved "https://registry.yarnpkg.com/semver/-/semver-5.4.1.tgz#e059c09d8571f0540823733433505d3a2f00b18e"
+  integrity sha512-WfG/X9+oATh81XtllIo/I8gOiY9EXRdv1cQdyykeXK17YcUW3EXUAi2To4pcH6nZtJPr7ZOpM5OMyWJZm+8Rsg==
+
 send@0.17.1:
   version "0.17.1"
   resolved "https://registry.yarnpkg.com/send/-/send-0.17.1.tgz#c1d8b059f7900f7466dd4938bdc44e11ddb376c8"
@@ -11474,6 +11676,11 @@ string-editor@^0.1.0:
   dependencies:
     editor "^1.0.0"
 
+string-format@^2.0.0:
+  version "2.0.0"
+  resolved "https://registry.yarnpkg.com/string-format/-/string-format-2.0.0.tgz#f2df2e7097440d3b65de31b6d40d54c96eaffb9b"
+  integrity sha512-bbEs3scLeYNXLecRRuk6uJxdXUSj6le/8rNPHChIJTn2V79aXVTR1EH2OH5zLKKoz0V02fOUKZZcw01pLUShZA==
+
 string-width@^1.0.1:
   version "1.0.2"
   resolved "https://registry.yarnpkg.com/string-width/-/string-width-1.0.2.tgz#118bdf5b8cdc51a2a7e70d211e07e2b0b9b107d3"
@@ -11709,6 +11916,16 @@ swarm-js@^0.1.40:
     tar "^4.0.2"
     xhr-request "^1.0.1"
 
+table-layout@^1.0.2:
+  version "1.0.2"
+  resolved "https://registry.yarnpkg.com/table-layout/-/table-layout-1.0.2.tgz#c4038a1853b0136d63365a734b6931cf4fad4a04"
+  integrity sha512-qd/R7n5rQTRFi+Zf2sk5XVVd9UQl6ZkduPFC3S7WEGJAmetDTjY3qPN50eSKzwuzEyQKy5TN2TiZdkIjos2L6A==
+  dependencies:
+    array-back "^4.0.1"
+    deep-extend "~0.6.0"
+    typical "^5.2.0"
+    wordwrapjs "^4.0.0"
+
 table@^5.2.3:
   version "5.4.6"
   resolved "https://registry.yarnpkg.com/table/-/table-5.4.6.tgz#1292d19500ce3f86053b05f0e8e7e4a3bb21079e"
@@ -12034,6 +12251,21 @@ truffle@^5.0.32:
     mocha "8.1.2"
     original-require "1.0.1"
 
+ts-command-line-args@^2.2.0:
+  version "2.3.1"
+  resolved "https://registry.yarnpkg.com/ts-command-line-args/-/ts-command-line-args-2.3.1.tgz#b6188e42efc6cf7a8898e438a873fbb15505ddd6"
+  integrity sha512-FR3y7pLl/fuUNSmnPhfLArGqRrpojQgIEEOVzYx9DhTmfIN7C9RWSfpkJEF4J+Gk7aVx5pak8I7vWZsaN4N84g==
+  dependencies:
+    chalk "^4.1.0"
+    command-line-args "^5.1.1"
+    command-line-usage "^6.1.0"
+    string-format "^2.0.0"
+
+ts-essentials@^7.0.1:
+  version "7.0.3"
+  resolved "https://registry.yarnpkg.com/ts-essentials/-/ts-essentials-7.0.3.tgz#686fd155a02133eedcc5362dc8b5056cde3e5a38"
+  integrity sha512-8+gr5+lqO3G84KdiTSMRLtuyJ+nTBVRKuCrK4lidMPdVeEp0uqC875uE5NMcaA7YYMN7XsNiFQuMvasF8HT/xQ==
+
 tslib@1.9.0:
   version "1.9.0"
   resolved "https://registry.yarnpkg.com/tslib/-/tslib-1.9.0.tgz#e37a86fda8cbbaf23a057f473c9f4dc64e5fc2e8"
@@ -12150,6 +12382,22 @@ type@^2.0.0:
   version "2.1.0"
   resolved "https://registry.yarnpkg.com/type/-/type-2.1.0.tgz#9bdc22c648cf8cf86dd23d32336a41cfb6475e3f"
 
+typechain@^8.0.0:
+  version "8.0.0"
+  resolved "https://registry.yarnpkg.com/typechain/-/typechain-8.0.0.tgz#a5dbe754717a7e16247df52b5285903de600e8ff"
+  integrity sha512-rqDfDYc9voVAhmfVfAwzg3VYFvhvs5ck1X9T/iWkX745Cul4t+V/smjnyqrbDzWDbzD93xfld1epg7Y/uFAesQ==
+  dependencies:
+    "@types/prettier" "^2.1.1"
+    debug "^4.3.1"
+    fs-extra "^7.0.0"
+    glob "7.1.7"
+    js-sha3 "^0.8.0"
+    lodash "^4.17.15"
+    mkdirp "^1.0.4"
+    prettier "^2.3.1"
+    ts-command-line-args "^2.2.0"
+    ts-essentials "^7.0.1"
+
 typedarray-to-buffer@^3.1.5:
   version "3.1.5"
   resolved "https://registry.yarnpkg.com/typedarray-to-buffer/-/typedarray-to-buffer-3.1.5.tgz#a97ee7a9ff42691b9f783ff1bc5112fe3fca9080"
@@ -12227,6 +12475,16 @@ typewiselite@~1.0.0:
   version "1.0.0"
   resolved "https://registry.yarnpkg.com/typewiselite/-/typewiselite-1.0.0.tgz#c8882fa1bb1092c06005a97f34ef5c8508e3664e"
 
+typical@^4.0.0:
+  version "4.0.0"
+  resolved "https://registry.yarnpkg.com/typical/-/typical-4.0.0.tgz#cbeaff3b9d7ae1e2bbfaf5a4e6f11eccfde94fc4"
+  integrity sha512-VAH4IvQ7BDFYglMd7BPRDfLgxZZX4O4TFcRDA6EN5X7erNJJq+McIEp8np9aVtxrCJ6qx4GTYVfOWNjcqwZgRw==
+
+typical@^5.2.0:
+  version "5.2.0"
+  resolved "https://registry.yarnpkg.com/typical/-/typical-5.2.0.tgz#4daaac4f2b5315460804f0acf6cb69c52bb93066"
+  integrity sha512-dvdQgNDNJo+8B2uBQoqdb11eUCE1JQXhvjC/CZtgvZseVd5TYMXnq0+vuUemXbd/Se29cTaUuPX3YIc2xgbvIg==
+
 u2f-api@0.2.7:
   version "0.2.7"
   resolved "https://registry.yarnpkg.com/u2f-api/-/u2f-api-0.2.7.tgz#17bf196b242f6bf72353d9858e6a7566cc192720"
@@ -13237,6 +13495,14 @@ wordwrap@^1.0.0:
   version "1.0.0"
   resolved "https://registry.yarnpkg.com/wordwrap/-/wordwrap-1.0.0.tgz#27584810891456a4171c8d0226441ade90cbcaeb"
 
+wordwrapjs@^4.0.0:
+  version "4.0.1"
+  resolved "https://registry.yarnpkg.com/wordwrapjs/-/wordwrapjs-4.0.1.tgz#d9790bccfb110a0fc7836b5ebce0937b37a8b98f"
+  integrity sha512-kKlNACbvHrkpIw6oPeYDSmdCTu2hdMHoyXLTcUKala++lx5Y+wjJ/e474Jqv5abnVmwxw08DiTuHmw69lJGksA==
+  dependencies:
+    reduce-flatten "^2.0.0"
+    typical "^5.2.0"
+
 workerpool@6.0.0:
   version "6.0.0"
   resolved "https://registry.yarnpkg.com/workerpool/-/workerpool-6.0.0.tgz#85aad67fa1a2c8ef9386a1b43539900f61d03d58"