wip: stash

* Added some more deployments

* Rename WETH9 to WETH9V06

* Set to 0.6.x

* fix typo

.circleci/config.yml

@@ -88,7 +88,7 @@ jobs:
                   keys:
                       - repo-{{ .Environment.CIRCLE_SHA1 }}
             # - run: forge install
-            - run: forge test
+            - run: forge test -vvv
     test-publish:
         resource_class: large
         environment:

.gitmodules

@@ -1,3 +1,6 @@
 [submodule "contracts/zero-ex/contracts/deps/forge-std"]
 	path = contracts/zero-ex/contracts/deps/forge-std
 	url = https://github.com/foundry-rs/forge-std
+[submodule "contracts/utils/contracts/src/openzeppelin-contracts"]
+	path = contracts/utils/contracts/src/openzeppelin-contracts
+	url = https://github.com/OpenZeppelin/openzeppelin-contracts

contracts/erc20/contracts/src/v06/WETH9V06.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 ^0.6.0;
+
+
+contract WETH9V06 {
+    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;
+    }
+}
+
+
+/*
+                    GNU GENERAL PUBLIC LICENSE
+                       Version 3, 29 June 2007
+
+ Copyright (C) 2007 Free Software Foundation, Inc. <http://fsf.org/>
+ Everyone is permitted to copy and distribute verbatim copies
+ of this license document, but changing it is not allowed.
+
+                            Preamble
+
+  The GNU General Public License is a free, copyleft license for
+software and other kinds of works.
+
+  The licenses for most software and other practical works are designed
+to take away your freedom to share and change the works.  By contrast,
+the GNU General Public License is intended to guarantee your freedom to
+share and change all versions of a program--to make sure it remains free
+software for all its users.  We, the Free Software Foundation, use the
+GNU General Public License for most of our software; it applies also to
+any other work released this way by its authors.  You can apply it to
+your programs, too.
+
+  When we speak of free software, we are referring to freedom, not
+price.  Our General Public Licenses are designed to make sure that you
+have the freedom to distribute copies of free software (and charge for
+them if you wish), that you receive source code or can get it if you
+want it, that you can change the software or use pieces of it in new
+free programs, and that you know you can do these things.
+
+  To protect your rights, we need to prevent others from denying you
+these rights or asking you to surrender the rights.  Therefore, you have
+certain responsibilities if you distribute copies of the software, or if
+you modify it: responsibilities to respect the freedom of others.
+
+  For example, if you distribute copies of such a program, whether
+gratis or for a fee, you must pass on to the recipients the same
+freedoms that you received.  You must make sure that they, too, receive
+or can get the source code.  And you must show them these terms so they
+know their rights.
+
+  Developers that use the GNU GPL protect your rights with two steps:
+(1) assert copyright on the software, and (2) offer you this License
+giving you legal permission to copy, distribute and/or modify it.
+
+  For the developers' and authors' protection, the GPL clearly explains
+that there is no warranty for this free software.  For both users' and
+authors' sake, the GPL requires that modified versions be marked as
+changed, so that their problems will not be attributed erroneously to
+authors of previous versions.
+
+  Some devices are designed to deny users access to install or run
+modified versions of the software inside them, although the manufacturer
+can do so.  This is fundamentally incompatible with the aim of
+protecting users' freedom to change the software.  The systematic
+pattern of such abuse occurs in the area of products for individuals to
+use, which is precisely where it is most unacceptable.  Therefore, we
+have designed this version of the GPL to prohibit the practice for those
+products.  If such problems arise substantially in other domains, we
+stand ready to extend this provision to those domains in future versions
+of the GPL, as needed to protect the freedom of users.
+
+  Finally, every program is threatened constantly by software patents.
+States should not allow patents to restrict development and use of
+software on general-purpose computers, but in those that do, we wish to
+avoid the special danger that patents applied to a free program could
+make it effectively proprietary.  To prevent this, the GPL assures that
+patents cannot be used to render the program non-free.
+
+  The precise terms and conditions for copying, distribution and
+modification follow.
+
+                       TERMS AND CONDITIONS
+
+  0. Definitions.
+
+  "This License" refers to version 3 of the GNU General Public License.
+
+  "Copyright" also means copyright-like laws that apply to other kinds of
+works, such as semiconductor masks.
+
+  "The Program" refers to any copyrightable work licensed under this
+License.  Each licensee is addressed as "you".  "Licensees" and
+"recipients" may be individuals or organizations.
+
+  To "modify" a work means to copy from or adapt all or part of the work
+in a fashion requiring copyright permission, other than the making of an
+exact copy.  The resulting work is called a "modified version" of the
+earlier work or a work "based on" the earlier work.
+
+  A "covered work" means either the unmodified Program or a work based
+on the Program.
+
+  To "propagate" a work means to do anything with it that, without
+permission, would make you directly or secondarily liable for
+infringement under applicable copyright law, except executing it on a
+computer or modifying a private copy.  Propagation includes copying,
+distribution (with or without modification), making available to the
+public, and in some countries other activities as well.
+
+  To "convey" a work means any kind of propagation that enables other
+parties to make or receive copies.  Mere interaction with a user through
+a computer network, with no transfer of a copy, is not conveying.
+
+  An interactive user interface displays "Appropriate Legal Notices"
+to the extent that it includes a convenient and prominently visible
+feature that (1) displays an appropriate copyright notice, and (2)
+tells the user that there is no warranty for the work (except to the
+extent that warranties are provided), that licensees may convey the
+work under this License, and how to view a copy of this License.  If
+the interface presents a list of user commands or options, such as a
+menu, a prominent item in the list meets this criterion.
+
+  1. Source Code.
+
+  The "source code" for a work means the preferred form of the work
+for making modifications to it.  "Object code" means any non-source
+form of a work.
+
+  A "Standard Interface" means an interface that either is an official
+standard defined by a recognized standards body, or, in the case of
+interfaces specified for a particular programming language, one that
+is widely used among developers working in that language.
+
+  The "System Libraries" of an executable work include anything, other
+than the work as a whole, that (a) is included in the normal form of
+packaging a Major Component, but which is not part of that Major
+Component, and (b) serves only to enable use of the work with that
+Major Component, or to implement a Standard Interface for which an
+implementation is available to the public in source code form.  A
+"Major Component", in this context, means a major essential component
+(kernel, window system, and so on) of the specific operating system
+(if any) on which the executable work runs, or a compiler used to
+produce the work, or an object code interpreter used to run it.
+
+  The "Corresponding Source" for a work in object code form means all
+the source code needed to generate, install, and (for an executable
+work) run the object code and to modify the work, including scripts to
+control those activities.  However, it does not include the work's
+System Libraries, or general-purpose tools or generally available free
+programs which are used unmodified in performing those activities but
+which are not part of the work.  For example, Corresponding Source
+includes interface definition files associated with source files for
+the work, and the source code for shared libraries and dynamically
+linked subprograms that the work is specifically designed to require,
+such as by intimate data communication or control flow between those
+subprograms and other parts of the work.
+
+  The Corresponding Source need not include anything that users
+can regenerate automatically from other parts of the Corresponding
+Source.
+
+  The Corresponding Source for a work in source code form is that
+same work.
+
+  2. Basic Permissions.
+
+  All rights granted under this License are granted for the term of
+copyright on the Program, and are irrevocable provided the stated
+conditions are met.  This License explicitly affirms your unlimited
+permission to run the unmodified Program.  The output from running a
+covered work is covered by this License only if the output, given its
+content, constitutes a covered work.  This License acknowledges your
+rights of fair use or other equivalent, as provided by copyright law.
+
+  You may make, run and propagate covered works that you do not
+convey, without conditions so long as your license otherwise remains
+in force.  You may convey covered works to others for the sole purpose
+of having them make modifications exclusively for you, or provide you
+with facilities for running those works, provided that you comply with
+the terms of this License in conveying all material for which you do
+not control copyright.  Those thus making or running the covered works
+for you must do so exclusively on your behalf, under your direction
+and control, on terms that prohibit them from making any copies of
+your copyrighted material outside their relationship with you.
+
+  Conveying under any other circumstances is permitted solely under
+the conditions stated below.  Sublicensing is not allowed; section 10
+makes it unnecessary.
+
+  3. Protecting Users' Legal Rights From Anti-Circumvention Law.
+
+  No covered work shall be deemed part of an effective technological
+measure under any applicable law fulfilling obligations under article
+11 of the WIPO copyright treaty adopted on 20 December 1996, or
+similar laws prohibiting or restricting circumvention of such
+measures.
+
+  When you convey a covered work, you waive any legal power to forbid
+circumvention of technological measures to the extent such circumvention
+is effected by exercising rights under this License with respect to
+the covered work, and you disclaim any intention to limit operation or
+modification of the work as a means of enforcing, against the work's
+users, your or third parties' legal rights to forbid circumvention of
+technological measures.
+
+  4. Conveying Verbatim Copies.
+
+  You may convey verbatim copies of the Program's source code as you
+receive it, in any medium, provided that you conspicuously and
+appropriately publish on each copy an appropriate copyright notice;
+keep intact all notices stating that this License and any
+non-permissive terms added in accord with section 7 apply to the code;
+keep intact all notices of the absence of any warranty; and give all
+recipients a copy of this License along with the Program.
+
+  You may charge any price or no price for each copy that you convey,
+and you may offer support or warranty protection for a fee.
+
+  5. Conveying Modified Source Versions.
+
+  You may convey a work based on the Program, or the modifications to
+produce it from the Program, in the form of source code under the
+terms of section 4, provided that you also meet all of these conditions:
+
+    a) The work must carry prominent notices stating that you modified
+    it, and giving a relevant date.
+
+    b) The work must carry prominent notices stating that it is
+    released under this License and any conditions added under section
+    7.  This requirement modifies the requirement in section 4 to
+    "keep intact all notices".
+
+    c) You must license the entire work, as a whole, under this
+    License to anyone who comes into possession of a copy.  This
+    License will therefore apply, along with any applicable section 7
+    additional terms, to the whole of the work, and all its parts,
+    regardless of how they are packaged.  This License gives no
+    permission to license the work in any other way, but it does not
+    invalidate such permission if you have separately received it.
+
+    d) If the work has interactive user interfaces, each must display
+    Appropriate Legal Notices; however, if the Program has interactive
+    interfaces that do not display Appropriate Legal Notices, your
+    work need not make them do so.
+
+  A compilation of a covered work with other separate and independent
+works, which are not by their nature extensions of the covered work,
+and which are not combined with it such as to form a larger program,
+in or on a volume of a storage or distribution medium, is called an
+"aggregate" if the compilation and its resulting copyright are not
+used to limit the access or legal rights of the compilation's users
+beyond what the individual works permit.  Inclusion of a covered work
+in an aggregate does not cause this License to apply to the other
+parts of the aggregate.
+
+  6. Conveying Non-Source Forms.
+
+  You may convey a covered work in object code form under the terms
+of sections 4 and 5, provided that you also convey the
+machine-readable Corresponding Source under the terms of this License,
+in one of these ways:
+
+    a) Convey the object code in, or embodied in, a physical product
+    (including a physical distribution medium), accompanied by the
+    Corresponding Source fixed on a durable physical medium
+    customarily used for software interchange.
+
+    b) Convey the object code in, or embodied in, a physical product
+    (including a physical distribution medium), accompanied by a
+    written offer, valid for at least three years and valid for as
+    long as you offer spare parts or customer support for that product
+    model, to give anyone who possesses the object code either (1) a
+    copy of the Corresponding Source for all the software in the
+    product that is covered by this License, on a durable physical
+    medium customarily used for software interchange, for a price no
+    more than your reasonable cost of physically performing this
+    conveying of source, or (2) access to copy the
+    Corresponding Source from a network server at no charge.
+
+    c) Convey individual copies of the object code with a copy of the
+    written offer to provide the Corresponding Source.  This
+    alternative is allowed only occasionally and noncommercially, and
+    only if you received the object code with such an offer, in accord
+    with subsection 6b.
+
+    d) Convey the object code by offering access from a designated
+    place (gratis or for a charge), and offer equivalent access to the
+    Corresponding Source in the same way through the same place at no
+    further charge.  You need not require recipients to copy the
+    Corresponding Source along with the object code.  If the place to
+    copy the object code is a network server, the Corresponding Source
+    may be on a different server (operated by you or a third party)
+    that supports equivalent copying facilities, provided you maintain
+    clear directions next to the object code saying where to find the
+    Corresponding Source.  Regardless of what server hosts the
+    Corresponding Source, you remain obligated to ensure that it is
+    available for as long as needed to satisfy these requirements.
+
+    e) Convey the object code using peer-to-peer transmission, provided
+    you inform other peers where the object code and Corresponding
+    Source of the work are being offered to the general public at no
+    charge under subsection 6d.
+
+  A separable portion of the object code, whose source code is excluded
+from the Corresponding Source as a System Library, need not be
+included in conveying the object code work.
+
+  A "User Product" is either (1) a "consumer product", which means any
+tangible personal property which is normally used for personal, family,
+or household purposes, or (2) anything designed or sold for incorporation
+into a dwelling.  In determining whether a product is a consumer product,
+doubtful cases shall be resolved in favor of coverage.  For a particular
+product received by a particular user, "normally used" refers to a
+typical or common use of that class of product, regardless of the status
+of the particular user or of the way in which the particular user
+actually uses, or expects or is expected to use, the product.  A product
+is a consumer product regardless of whether the product has substantial
+commercial, industrial or non-consumer uses, unless such uses represent
+the only significant mode of use of the product.
+
+  "Installation Information" for a User Product means any methods,
+procedures, authorization keys, or other information required to install
+and execute modified versions of a covered work in that User Product from
+a modified version of its Corresponding Source.  The information must
+suffice to ensure that the continued functioning of the modified object
+code is in no case prevented or interfered with solely because
+modification has been made.
+
+  If you convey an object code work under this section in, or with, or
+specifically for use in, a User Product, and the conveying occurs as
+part of a transaction in which the right of possession and use of the
+User Product is transferred to the recipient in perpetuity or for a
+fixed term (regardless of how the transaction is characterized), the
+Corresponding Source conveyed under this section must be accompanied
+by the Installation Information.  But this requirement does not apply
+if neither you nor any third party retains the ability to install
+modified object code on the User Product (for example, the work has
+been installed in ROM).
+
+  The requirement to provide Installation Information does not include a
+requirement to continue to provide support service, warranty, or updates
+for a work that has been modified or installed by the recipient, or for
+the User Product in which it has been modified or installed.  Access to a
+network may be denied when the modification itself materially and
+adversely affects the operation of the network or violates the rules and
+protocols for communication across the network.
+
+  Corresponding Source conveyed, and Installation Information provided,
+in accord with this section must be in a format that is publicly
+documented (and with an implementation available to the public in
+source code form), and must require no special password or key for
+unpacking, reading or copying.
+
+  7. Additional Terms.
+
+  "Additional permissions" are terms that supplement the terms of this
+License by making exceptions from one or more of its conditions.
+Additional permissions that are applicable to the entire Program shall
+be treated as though they were included in this License, to the extent
+that they are valid under applicable law.  If additional permissions
+apply only to part of the Program, that part may be used separately
+under those permissions, but the entire Program remains governed by
+this License without regard to the additional permissions.
+
+  When you convey a copy of a covered work, you may at your option
+remove any additional permissions from that copy, or from any part of
+it.  (Additional permissions may be written to require their own
+removal in certain cases when you modify the work.)  You may place
+additional permissions on material, added by you to a covered work,
+for which you have or can give appropriate copyright permission.
+
+  Notwithstanding any other provision of this License, for material you
+add to a covered work, you may (if authorized by the copyright holders of
+that material) supplement the terms of this License with terms:
+
+    a) Disclaiming warranty or limiting liability differently from the
+    terms of sections 15 and 16 of this License; or
+
+    b) Requiring preservation of specified reasonable legal notices or
+    author attributions in that material or in the Appropriate Legal
+    Notices displayed by works containing it; or
+
+    c) Prohibiting misrepresentation of the origin of that material, or
+    requiring that modified versions of such material be marked in
+    reasonable ways as different from the original version; or
+
+    d) Limiting the use for publicity purposes of names of licensors or
+    authors of the material; or
+
+    e) Declining to grant rights under trademark law for use of some
+    trade names, trademarks, or service marks; or
+
+    f) Requiring indemnification of licensors and authors of that
+    material by anyone who conveys the material (or modified versions of
+    it) with contractual assumptions of liability to the recipient, for
+    any liability that these contractual assumptions directly impose on
+    those licensors and authors.
+
+  All other non-permissive additional terms are considered "further
+restrictions" within the meaning of section 10.  If the Program as you
+received it, or any part of it, contains a notice stating that it is
+governed by this License along with a term that is a further
+restriction, you may remove that term.  If a license document contains
+a further restriction but permits relicensing or conveying under this
+License, you may add to a covered work material governed by the terms
+of that license document, provided that the further restriction does
+not survive such relicensing or conveying.
+
+  If you add terms to a covered work in accord with this section, you
+must place, in the relevant source files, a statement of the
+additional terms that apply to those files, or a notice indicating
+where to find the applicable terms.
+
+  Additional terms, permissive or non-permissive, may be stated in the
+form of a separately written license, or stated as exceptions;
+the above requirements apply either way.
+
+  8. Termination.
+
+  You may not propagate or modify a covered work except as expressly
+provided under this License.  Any attempt otherwise to propagate or
+modify it is void, and will automatically terminate your rights under
+this License (including any patent licenses granted under the third
+paragraph of section 11).
+
+  However, if you cease all violation of this License, then your
+license from a particular copyright holder is reinstated (a)
+provisionally, unless and until the copyright holder explicitly and
+finally terminates your license, and (b) permanently, if the copyright
+holder fails to notify you of the violation by some reasonable means
+prior to 60 days after the cessation.
+
+  Moreover, your license from a particular copyright holder is
+reinstated permanently if the copyright holder notifies you of the
+violation by some reasonable means, this is the first time you have
+received notice of violation of this License (for any work) from that
+copyright holder, and you cure the violation prior to 30 days after
+your receipt of the notice.
+
+  Termination of your rights under this section does not terminate the
+licenses of parties who have received copies or rights from you under
+this License.  If your rights have been terminated and not permanently
+reinstated, you do not qualify to receive new licenses for the same
+material under section 10.
+
+  9. Acceptance Not Required for Having Copies.
+
+  You are not required to accept this License in order to receive or
+run a copy of the Program.  Ancillary propagation of a covered work
+occurring solely as a consequence of using peer-to-peer transmission
+to receive a copy likewise does not require acceptance.  However,
+nothing other than this License grants you permission to propagate or
+modify any covered work.  These actions infringe copyright if you do
+not accept this License.  Therefore, by modifying or propagating a
+covered work, you indicate your acceptance of this License to do so.
+
+  10. Automatic Licensing of Downstream Recipients.
+
+  Each time you convey a covered work, the recipient automatically
+receives a license from the original licensors, to run, modify and
+propagate that work, subject to this License.  You are not responsible
+for enforcing compliance by third parties with this License.
+
+  An "entity transaction" is a transaction transferring control of an
+organization, or substantially all assets of one, or subdividing an
+organization, or merging organizations.  If propagation of a covered
+work results from an entity transaction, each party to that
+transaction who receives a copy of the work also receives whatever
+licenses to the work the party's predecessor in interest had or could
+give under the previous paragraph, plus a right to possession of the
+Corresponding Source of the work from the predecessor in interest, if
+the predecessor has it or can get it with reasonable efforts.
+
+  You may not impose any further restrictions on the exercise of the
+rights granted or affirmed under this License.  For example, you may
+not impose a license fee, royalty, or other charge for exercise of
+rights granted under this License, and you may not initiate litigation
+(including a cross-claim or counterclaim in a lawsuit) alleging that
+any patent claim is infringed by making, using, selling, offering for
+sale, or importing the Program or any portion of it.
+
+  11. Patents.
+
+  A "contributor" is a copyright holder who authorizes use under this
+License of the Program or a work on which the Program is based.  The
+work thus licensed is called the contributor's "contributor version".
+
+  A contributor's "essential patent claims" are all patent claims
+owned or controlled by the contributor, whether already acquired or
+hereafter acquired, that would be infringed by some manner, permitted
+by this License, of making, using, or selling its contributor version,
+but do not include claims that would be infringed only as a
+consequence of further modification of the contributor version.  For
+purposes of this definition, "control" includes the right to grant
+patent sublicenses in a manner consistent with the requirements of
+this License.
+
+  Each contributor grants you a non-exclusive, worldwide, royalty-free
+patent license under the contributor's essential patent claims, to
+make, use, sell, offer for sale, import and otherwise run, modify and
+propagate the contents of its contributor version.
+
+  In the following three paragraphs, a "patent license" is any express
+agreement or commitment, however denominated, not to enforce a patent
+(such as an express permission to practice a patent or covenant not to
+sue for patent infringement).  To "grant" such a patent license to a
+party means to make such an agreement or commitment not to enforce a
+patent against the party.
+
+  If you convey a covered work, knowingly relying on a patent license,
+and the Corresponding Source of the work is not available for anyone
+to copy, free of charge and under the terms of this License, through a
+publicly available network server or other readily accessible means,
+then you must either (1) cause the Corresponding Source to be so
+available, or (2) arrange to deprive yourself of the benefit of the
+patent license for this particular work, or (3) arrange, in a manner
+consistent with the requirements of this License, to extend the patent
+license to downstream recipients.  "Knowingly relying" means you have
+actual knowledge that, but for the patent license, your conveying the
+covered work in a country, or your recipient's use of the covered work
+in a country, would infringe one or more identifiable patents in that
+country that you have reason to believe are valid.
+
+  If, pursuant to or in connection with a single transaction or
+arrangement, you convey, or propagate by procuring conveyance of, a
+covered work, and grant a patent license to some of the parties
+receiving the covered work authorizing them to use, propagate, modify
+or convey a specific copy of the covered work, then the patent license
+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/erc20/package.json

@@ -38,7 +38,7 @@
     },
     "config": {
         "publicInterfaceContracts": "DummyERC20Token,ERC20Token,WETH9,ZRXToken,DummyNoReturnERC20Token,DummyMultipleReturnERC20Token",
-        "abis": "./test/generated-artifacts/@(DummyERC20Token|DummyMultipleReturnERC20Token|DummyNoReturnERC20Token|ERC20Token|IERC20Token|IERC20TokenV06|IEtherToken|IEtherTokenV06|LibERC20Token|LibERC20TokenV06|MintableERC20Token|TestLibERC20Token|TestLibERC20TokenTarget|UnlimitedAllowanceERC20Token|UntransferrableDummyERC20Token|WETH9|ZRXToken).json",
+        "abis": "./test/generated-artifacts/@(DummyERC20Token|DummyMultipleReturnERC20Token|DummyNoReturnERC20Token|ERC20Token|IERC20Token|IERC20TokenV06|IEtherToken|IEtherTokenV06|LibERC20Token|LibERC20TokenV06|MintableERC20Token|TestLibERC20Token|TestLibERC20TokenTarget|UnlimitedAllowanceERC20Token|UntransferrableDummyERC20Token|WETH9|WETH9V06|ZRXToken).json",
         "abis:comment": "This list is auto-generated by contracts-gen. Don't edit manually."
     },
     "repository": {

contracts/erc20/test/artifacts.ts

@@ -21,6 +21,7 @@ import * as TestLibERC20TokenTarget from '../test/generated-artifacts/TestLibERC
 import * as UnlimitedAllowanceERC20Token from '../test/generated-artifacts/UnlimitedAllowanceERC20Token.json';
 import * as UntransferrableDummyERC20Token from '../test/generated-artifacts/UntransferrableDummyERC20Token.json';
 import * as WETH9 from '../test/generated-artifacts/WETH9.json';
+import * as WETH9V06 from '../test/generated-artifacts/WETH9V06.json';
 import * as ZRXToken from '../test/generated-artifacts/ZRXToken.json';
 export const artifacts = {
     ERC20Token: ERC20Token as ContractArtifact,
@@ -34,6 +35,7 @@ export const artifacts = {
     IERC20TokenV06: IERC20TokenV06 as ContractArtifact,
     IEtherTokenV06: IEtherTokenV06 as ContractArtifact,
     LibERC20TokenV06: LibERC20TokenV06 as ContractArtifact,
+    WETH9V06: WETH9V06 as ContractArtifact,
     DummyERC20Token: DummyERC20Token as ContractArtifact,
     DummyMultipleReturnERC20Token: DummyMultipleReturnERC20Token as ContractArtifact,
     DummyNoReturnERC20Token: DummyNoReturnERC20Token as ContractArtifact,

contracts/erc20/test/wrappers.ts

@@ -19,4 +19,5 @@ export * from '../test/generated-wrappers/test_lib_erc20_token_target';
 export * from '../test/generated-wrappers/unlimited_allowance_erc20_token';
 export * from '../test/generated-wrappers/untransferrable_dummy_erc20_token';
 export * from '../test/generated-wrappers/weth9';
+export * from '../test/generated-wrappers/weth9v06';
 export * from '../test/generated-wrappers/zrx_token';

contracts/erc20/tsconfig.json

@@ -25,6 +25,7 @@
         "test/generated-artifacts/UnlimitedAllowanceERC20Token.json",
         "test/generated-artifacts/UntransferrableDummyERC20Token.json",
         "test/generated-artifacts/WETH9.json",
+        "test/generated-artifacts/WETH9V06.json",
         "test/generated-artifacts/ZRXToken.json"
     ],
     "exclude": ["./deploy/solc/solc_bin"]

contracts/zero-ex/contracts/src/features/OtcOrdersFeature.sol

@@ -35,6 +35,9 @@ import "./interfaces/IOtcOrdersFeature.sol";
 import "./libs/LibNativeOrder.sol";
 import "./libs/LibSignature.sol";
 
+import "forge-std/console.sol";
+
+
 
 /// @dev Feature for interacting with OTC orders.
 contract OtcOrdersFeature is
@@ -76,6 +79,7 @@ contract OtcOrdersFeature is
         _registerFeatureFunction(this.fillTakerSignedOtcOrderForEth.selector);
         _registerFeatureFunction(this.fillTakerSignedOtcOrder.selector);
         _registerFeatureFunction(this.batchFillTakerSignedOtcOrders.selector);
+        _registerFeatureFunction(this.matchOtcOrders.selector);
         _registerFeatureFunction(this._fillOtcOrder.selector);
         _registerFeatureFunction(this.getOtcOrderInfo.selector);
         _registerFeatureFunction(this.getOtcOrderHash.selector);
@@ -364,6 +368,95 @@ contract OtcOrdersFeature is
                 )
             );
         }
+    }
+
+    function matchOtcOrders(
+        LibNativeOrder.OtcOrder calldata takerOrder,
+        LibSignature.Signature calldata takerSignature,
+        MatchingRfqLiquidity[] calldata rfqLiquidity
+    )
+        external 
+        override
+    {
+        // Validate the takerOrder
+        LibNativeOrder.OtcOrderInfo memory takerOrderInfo = getOtcOrderInfo(takerOrder);
+        _validateOtcOrder(
+            takerOrder, 
+            takerOrderInfo,
+            takerSignature,
+            takerOrder.taker
+        );
+        // {
+        //     address taker = LibSignature.getSignerOfHash(
+        //         getOtcOrderInfo(takerOrder).orderHash,
+        //         takerSignature
+        //     );
+        //     require(taker == takerOrder.maker, "Signer of the takerOrder is incorrect");
+        // }
+
+        // price in terms of maker token per taker token
+        uint128 takerPrice = takerOrder.takerAmount * 1000 / takerOrder.makerAmount; 
+        uint128 takerAmountToFill = takerOrder.makerAmount;
+
+        for (uint256 i = 0; i != rfqLiquidity.length; i++) {
+            LibNativeOrder.OtcOrder calldata makerOrder = rfqLiquidity[i].makerOrder;
+            require(takerOrder.makerToken == makerOrder.takerToken && 
+                takerOrder.takerToken == makerOrder.makerToken, "orders do not match");
+
+            // Validate the maker
+            {
+                address maker = LibSignature.getSignerOfHash(
+                    getOtcOrderInfo(makerOrder).orderHash,
+                    rfqLiquidity[i].makerSignature
+                );
+                require(maker == takerOrder.maker, "Signer of the makerOrder is not maker");
+            }
+
+            // Find the midpoint amounts
+            // TODO - logic will be different for buy and sell amount targets - or we can only support one side :(
+            uint128 makerAmount;
+            uint128 takerAmount = LibSafeMathV06.min128(
+                takerAmountToFill, 
+                makerOrder.takerAmount
+            );
+            {
+                uint128 makerPrice = makerOrder.makerAmount * 1000 / makerOrder.takerAmount;
+                require(takerPrice <= makerPrice, "maker price is less than taker price");
+                uint128 midpointPrice = (takerPrice + makerPrice) / 2; // TODO make this safe
+                // console.log("takerPrice");
+                // console.log(takerPrice);
+                // console.log("makerPrice");
+                // console.log(makerPrice);
+                // console.log("midpointPrice");
+                // console.log(midpointPrice);
+                makerAmount = (takerAmount * midpointPrice) / 1000;
+            }
+
+
+
+
+            // // TODO - scale the taker amount to the maker amount
+            // uint128 takerTokenFillAmount = takerOrder.makerAmount;
+            // uint128 makerTokenFillAmount = makerOrder.makerAmount;
+
+            takerAmountToFill -= takerAmount; // TODO is this safe? is there a re-entrancy attack vector here?
+            address taker = takerOrder.maker;
+            _matchSettleOtcOrder(
+                takerOrder,
+                makerOrder,
+                takerAmount,
+                makerAmount,
+                taker,
+                taker
+                // takerOrder.maker,
+                // takerOrder.maker
+            );
+        }
+
+
+
+
+
     }
 
     /// @dev Fill an OTC order for up to `takerTokenFillAmount` taker tokens.
@@ -433,6 +526,7 @@ contract OtcOrdersFeature is
     {
         // Must be fillable.
         if (orderInfo.status != LibNativeOrder.OrderStatus.FILLABLE) {
+            console.log("OrderNotFillable");
             LibNativeOrdersRichErrors.OrderNotFillableError(
                 orderInfo.orderHash,
                 uint8(orderInfo.status)
@@ -441,6 +535,7 @@ contract OtcOrdersFeature is
 
         // Must be a valid taker for the order.
         if (order.taker != address(0) && order.taker != taker) {
+            console.log("OrderNotFillableByTaker");
             LibNativeOrdersRichErrors.OrderNotFillableByTakerError(
                 orderInfo.orderHash,
                 taker,
@@ -456,6 +551,9 @@ contract OtcOrdersFeature is
             order.txOrigin != tx.origin &&
             !stor.originRegistry[order.txOrigin][tx.origin]
         ) {
+            console.log("OrderNotFillableByOrigin");
+            console.log(tx.origin);
+            console.log(order.txOrigin);
             LibNativeOrdersRichErrors.OrderNotFillableByOriginError(
                 orderInfo.orderHash,
                 tx.origin,
@@ -469,6 +567,9 @@ contract OtcOrdersFeature is
             makerSigner != order.maker &&
             !stor.orderSignerRegistry[order.maker][makerSigner]
         ) {
+            console.log("OrderNotSignedByMaker");
+            console.log(makerSigner);
+            console.log(order.maker);
             LibNativeOrdersRichErrors.OrderNotSignedByMakerError(
                 orderInfo.orderHash,
                 makerSigner,
@@ -552,6 +653,104 @@ contract OtcOrdersFeature is
         );
     }
 
+
+    /// @dev Match two OTC orders and settle.
+    /// @param takerOrder The taker's OTC order.
+    /// @param makerOrder The maker's OTC order.
+    /// @param takerTokenFillAmount Maximum taker token amount to fill this
+    ///        order with.
+    /// @param payer The address holding the taker tokens.
+    /// @param recipient The recipient of the maker tokens.
+    /// @return takerTokenFilledAmount How much taker token was filled.
+    /// @return makerTokenFilledAmount How much maker token was filled.
+    function _matchSettleOtcOrder(
+        LibNativeOrder.OtcOrder memory takerOrder,
+        LibNativeOrder.OtcOrder memory makerOrder,
+        uint128 takerTokenFillAmount,
+        uint128 makerTokenFillAmount,
+        address payer,
+        address recipient
+    )
+        private
+        returns (uint128 takerTokenFilledAmount, uint128 makerTokenFilledAmount)
+    {
+        // Handle the takerOrder (should only be done once at the end....)
+        {
+            // Unpack nonce fields
+            uint64 nonceBucket = uint64(takerOrder.expiryAndNonce >> 128);
+            uint128 nonce = uint128(takerOrder.expiryAndNonce);
+            // Update tx origin nonce for the order
+            LibOtcOrdersStorage.getStorage().txOriginNonces
+                [takerOrder.txOrigin][nonceBucket] = nonce;
+        }
+
+        // Handle the makerOrder
+        {
+            // Unpack nonce fields
+            uint64 nonceBucket = uint64(makerOrder.expiryAndNonce >> 128);
+            uint128 nonce = uint128(makerOrder.expiryAndNonce);
+            // Update tx origin nonce for the order
+            LibOtcOrdersStorage.getStorage().txOriginNonces
+                [makerOrder.txOrigin][nonceBucket] = nonce;
+        }
+
+        address maker = makerOrder.maker;
+        address taker = takerOrder.maker;
+        console.log("transfer between");
+        console.log(maker);
+        console.log(taker);
+        IERC20TokenV06 makerToken = makerOrder.makerToken;
+        IERC20TokenV06 takerToken = takerOrder.makerToken;
+
+        // TODO
+        // validate the orders are both good (i.e. going in opposite directions)
+
+        // TODO: do we need to do this here, or should it be done outside?
+        // if (takerTokenFillAmount == order.takerAmount) {
+        //     takerTokenFilledAmount = order.takerAmount;
+        //     makerTokenFilledAmount = order.makerAmount;
+        // } else {
+        //     // Clamp the taker token fill amount to the fillable amount.
+        //     takerTokenFilledAmount = LibSafeMathV06.min128(
+        //         takerTokenFillAmount,
+        //         order.takerAmount
+        //     );
+        //     // Compute the maker token amount.
+        //     // This should never overflow because the values are all clamped to
+        //     // (2^128-1).
+        //     makerTokenFilledAmount = uint128(LibMathV06.getPartialAmountFloor(
+        //         uint256(takerTokenFilledAmount),
+        //         uint256(order.takerAmount),
+        //         uint256(order.makerAmount)
+        //     ));
+        // }
+
+
+        if (payer == address(this)) {
+            // Transfer this -> maker.
+            _transferERC20Tokens(
+                takerToken,
+                taker,
+                takerTokenFilledAmount
+            );                
+        } else {
+            // Transfer taker -> maker
+            _transferERC20TokensFrom(
+                takerToken,
+                payer,
+                maker,
+                takerTokenFillAmount
+            );
+        }
+        // Transfer maker -> recipient 
+        _transferERC20TokensFrom(
+            makerToken,
+            maker,
+            recipient,
+            makerTokenFillAmount
+        );
+    }
+
     /// @dev Get the order info for an OTC order.
     /// @param order The OTC order.
     /// @return orderInfo Info about the order.
@@ -577,12 +776,14 @@ contract OtcOrdersFeature is
             [order.txOrigin]
             [nonceBucket];
         if (nonce <= lastNonce) {
+            console.log("tx origin nonce is invalid");
             orderInfo.status = LibNativeOrder.OrderStatus.INVALID;
             return orderInfo;
         }
 
         // Check for expiration.
         if (expiry <= uint64(block.timestamp)) {
+            console.log("expired");
             orderInfo.status = LibNativeOrder.OrderStatus.EXPIRED;
             return orderInfo;
         }

contracts/zero-ex/contracts/src/features/interfaces/IOtcOrdersFeature.sol

@@ -42,6 +42,13 @@ interface IOtcOrdersFeature {
         uint128 makerTokenFilledAmount,
         uint128 takerTokenFilledAmount
     );
+    
+    struct MatchingRfqLiquidity {
+        LibNativeOrder.OtcOrder makerOrder;
+        LibSignature.Signature makerSignature;
+        uint128 settlementTakerAmount; // <= makerOrder.takerAmount
+        uint128 settlementMakerAmount; // <= makerOrder.makerAmount
+    }
 
     /// @dev Fill an OTC order for up to `takerTokenFillAmount` taker tokens.
     /// @param order The OTC order.
@@ -133,6 +140,14 @@ interface IOtcOrdersFeature {
         external
         returns (bool[] memory successes);
 
+    function matchOtcOrders(
+        LibNativeOrder.OtcOrder memory takerOrder,
+        LibSignature.Signature memory takerSignature,
+        MatchingRfqLiquidity[] calldata rfqLiquidity
+        // IBridgeAdapter.BridgeOrder[] calldata ammLiquidity // TODO
+    )
+        external;
+
     /// @dev Fill an OTC order for up to `takerTokenFillAmount` taker tokens.
     ///      Internal variant.
     /// @param order The OTC order.

contracts/zero-ex/contracts/test/foundry/BasicSwap.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 "./utils/ForkUtils.sol";
+import "./utils/TestUtils.sol";
+import "./utils/DeployZeroEx.sol";
+import "forge-std/Test.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/EthereumBridgeAdapter.sol";
+import "src/IZeroEx.sol";
+
+contract BasicSwapTest is 
+    Test,
+    ForkUtils,
+    TestUtils
+{  
+    DeployZeroEx.ZeroExDeployed zeroExDeployed;
+
+    function setUp()
+        public
+    {
+        zeroExDeployed = new DeployZeroEx().deployZeroEx();
+        vm.deal(address(this), 1e19);
+    }
+
+    function testTransformERC20()
+        public
+    {
+        emit log_string("-----Preparing ETH->WETH transformation through TransformERC20()-----");
+        emit log_string("   --Building Up Transformations--");
+        ITransformERC20Feature.Transformation[] memory transformations = new ITransformERC20Feature.Transformation[](1);
+
+        emit log_named_address("    Finding TransformerDeployer nonce @", address(zeroExDeployed.transformerDeployer));
+        emit log_named_uint(
+            "       Deployer nonce",
+            _findTransformerNonce(
+            address(zeroExDeployed.transformers.wethTransformer),
+            address(zeroExDeployed.transformerDeployer)
+        ));
+        transformations[0].deploymentNonce = _findTransformerNonce(address(zeroExDeployed.transformers.wethTransformer),address(zeroExDeployed.transformerDeployer));
+        transformations[0].data = abi.encode(LibERC20Transformer.ETH_TOKEN_ADDRESS, 1e18);
+
+        emit log_string("   ---Calling TransformERC20()---");
+        uint256 balanceETHBefore = address(this).balance;
+        uint256 balanceWETHBefore = zeroExDeployed.weth.balanceOf(address(this));
+        zeroExDeployed.zeroEx.transformERC20{value: 1e18}(
+            // input token
+            IERC20TokenV06(LibERC20Transformer.ETH_TOKEN_ADDRESS),
+            // output token
+            IERC20TokenV06(address(zeroExDeployed.weth)),
+            // input token amount
+            1e18,
+            // min output token amount
+            1e18,
+            // list of transform
+            transformations
+        );
+        assert(zeroExDeployed.weth.balanceOf(address(this)) == 1e18);
+        emit log_string("       Successful Transformation Complete");
+        emit log_named_uint("           ETH BALANCE BEFORE:", balanceETHBefore);
+        emit log_named_uint("           ETH BALANCE AFTER:", address(this).balance);
+        emit log_named_uint("           WETH BALANCE BEFORE:", balanceWETHBefore);
+        emit log_named_uint("           WETH BALANCE AFTER:", zeroExDeployed.weth.balanceOf(address(this)));
+    }
+
+
+    
+}

contracts/zero-ex/contracts/test/foundry/features/OtcOrdersFeature.t.sol

@@ -0,0 +1,331 @@
+// 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 "@0x/contracts-erc20/contracts/src/v06/IERC20TokenV06.sol";
+import "src/features/OtcOrdersFeature.sol";
+import "src/features/interfaces/IOtcOrdersFeature.sol";
+import "src/features/libs/LibNativeOrder.sol";
+import "src/features/libs/LibSignature.sol";
+import "../utils/DeployZeroEx.sol";
+import "../utils/TestERC20.sol";
+
+
+contract OtcOrdersFeatureTest is DeployZeroEx {
+
+    DeployZeroEx.ZeroExDeployed zeroExDeployed;
+    uint256 MAX_INT = uint256(-1);
+    address payable internal NULL_ADDRESS = address(0);
+    uint256 internal makerPk = 0xdeadbeef;
+    uint256 internal maker2Pk = 0xd00d00;
+    uint256 internal takerPk = 0xc0ffee;
+    uint256 internal workerPk = 0xb10b;
+    address payable internal maker = payable(vm.addr(makerPk));
+    address payable internal maker2 = payable(vm.addr(maker2Pk));
+    address payable internal taker = payable(vm.addr(takerPk));
+    address payable internal worker = payable(vm.addr(workerPk));
+    TestERC20 internal token1;
+    TestERC20 internal token2;
+
+    function sign(
+      LibNativeOrder.OtcOrder memory order,
+      uint256 pk
+    ) internal 
+      returns (
+      LibSignature.Signature memory signature
+    ) {
+        (uint8 v, bytes32 r, bytes32 s) = vm.sign(pk, IZERO_EX.getOtcOrderHash(order));
+        LibSignature.Signature memory signature = LibSignature.Signature({
+          signatureType: LibSignature.SignatureType.EIP712,
+          v: v,
+          r: r,
+          s: s
+        });
+
+        return signature;
+    }
+
+    function getOrder(
+      address maker,
+      address makerToken,
+      uint128 makerAmount,
+      address taker,
+      address takerToken,
+      uint128 takerAmount
+    ) 
+      internal 
+      returns (
+        LibNativeOrder.OtcOrder memory order
+      )
+    {
+        uint256 expiry = (block.timestamp + 120) << 192;
+        uint256 bucket = 1 << 128;
+        uint256 nonce = block.timestamp;
+        uint256 expiryAndNonce = expiry | bucket | nonce;
+
+        LibNativeOrder.OtcOrder memory order = LibNativeOrder.OtcOrder({
+          maker: maker,
+          makerToken: IERC20TokenV06(makerToken),
+          makerAmount: makerAmount,
+          taker: taker,
+          takerToken: IERC20TokenV06(takerToken),
+          takerAmount: takerAmount,
+          txOrigin: worker,
+          expiryAndNonce: expiryAndNonce
+        });
+
+        return order;
+
+    }
+    
+    function getOrderAndSignature(
+      address maker,
+      address makerToken,
+      uint128 makerAmount,
+      address taker,
+      address takerToken,
+      uint128 takerAmount
+    ) 
+      internal 
+      returns (
+        LibNativeOrder.OtcOrder memory order,
+        LibSignature.Signature memory signature
+      )
+    {
+        uint256 expiry = (block.timestamp + 120) << 192;
+        uint256 bucket = 1 << 128;
+        uint256 nonce = block.timestamp;
+        uint256 expiryAndNonce = expiry | bucket | nonce;
+
+        console.log("The worker");
+        console.log(worker);
+        LibNativeOrder.OtcOrder memory order = LibNativeOrder.OtcOrder({
+          maker: maker,
+          makerToken: IERC20TokenV06(makerToken),
+          makerAmount: makerAmount,
+          taker: taker,
+          takerToken: IERC20TokenV06(takerToken),
+          takerAmount: takerAmount,
+          txOrigin: worker,
+          expiryAndNonce: expiryAndNonce
+        });
+
+        // sign
+        LibSignature.Signature memory signature = sign(order, takerPk);
+        // (uint8 v, bytes32 r, bytes32 s) = vm.sign(takerPk, IZERO_EX.getOtcOrderHash(order));
+        // LibSignature.Signature memory signature = LibSignature.Signature({
+        //   signatureType: LibSignature.SignatureType.EIP712,
+        //   v: v,
+        //   r: r,
+        //   s: s
+        // });
+
+        return (order, signature);
+
+    }
+
+    function setUp() public {
+        zeroExDeployed = deployZeroEx();
+        // WETH wrapping and unwrapping is not going to work at this address
+        IEtherTokenV06 WETH = IEtherTokenV06(0xC02aaA39b223FE8D0A0e5C4F27eAD9083C756Cc2);
+        OtcOrdersFeature otcOrdersFeature = new OtcOrdersFeature(address(ZERO_EX), WETH);
+        IZERO_EX.migrate(address(otcOrdersFeature), abi.encodePacked(otcOrdersFeature.migrate.selector), address(this));
+
+        // Deploy some tokens
+        token1 = new TestERC20();
+        token2 = new TestERC20();
+
+        // Mint 
+        token1.mint(maker, 1000);
+        token2.mint(maker, 1000);
+
+        token1.mint(maker2, 1000);
+        token2.mint(maker2, 1000);
+
+        token1.mint(taker, 1000);
+        token2.mint(taker, 1000);
+
+        // Set Approvals
+        vm.startPrank(maker);
+        token1.approve(address(ZERO_EX), MAX_INT);
+        token2.approve(address(ZERO_EX), MAX_INT);
+        vm.stopPrank();
+
+        vm.startPrank(maker2);
+        token1.approve(address(ZERO_EX), MAX_INT);
+        token2.approve(address(ZERO_EX), MAX_INT);
+        vm.stopPrank();
+
+        vm.startPrank(taker);
+        token1.approve(address(ZERO_EX), MAX_INT);
+        token2.approve(address(ZERO_EX), MAX_INT);
+        vm.stopPrank();
+    }
+
+    function testFillTakerSignedOtcOrderSimple() external {
+        LibNativeOrder.OtcOrder memory order = getOrder(
+            maker,
+            address(token2),
+            100,
+            NULL_ADDRESS,
+            address(token1),
+            100
+        );
+
+        console.log("maker and taker");
+        console.log(maker);
+        console.log(taker);
+        LibSignature.Signature memory makerSignature = sign(order, makerPk);
+        LibSignature.Signature memory takerSignature = sign(order, takerPk);
+
+
+
+
+        // When
+        vm.prank(worker, worker); // set the tx.origin
+        IZERO_EX.fillTakerSignedOtcOrder(order, makerSignature, takerSignature);
+
+        // Then
+        assertEq(token1.balanceOf(taker), 900);
+        assertEq(token2.balanceOf(taker), 1100);
+        assertEq(token1.balanceOf(maker), 1100);
+        assertEq(token2.balanceOf(maker), 900);
+    }
+
+
+    function testMatchTakerToOneMaker() external {
+        // The Taker is the maker for this order
+        (
+          LibNativeOrder.OtcOrder memory takerOrder,
+          LibSignature.Signature memory takerSignature
+        ) = getOrderAndSignature(
+            taker,
+            address(token1),
+            100,
+            NULL_ADDRESS,
+            address(token2),
+            100
+        );
+
+        (
+          LibNativeOrder.OtcOrder memory makerOrder,
+          LibSignature.Signature memory makerSignature
+        ) = getOrderAndSignature(
+            maker,
+            address(token2),
+            100,
+            NULL_ADDRESS,
+            address(token1),
+            100
+        );
+          
+        IOtcOrdersFeature.MatchingRfqLiquidity[] memory rfqLiquidity = new IOtcOrdersFeature.MatchingRfqLiquidity[](1);
+        rfqLiquidity[0] = IOtcOrdersFeature.MatchingRfqLiquidity({
+          makerOrder: makerOrder,
+          makerSignature: makerSignature,
+          settlementTakerAmount: 100,
+          settlementMakerAmount: 100
+        });
+
+
+        // When
+        vm.prank(worker, worker); // set the tx.origin
+        IZERO_EX.matchOtcOrders(takerOrder, takerSignature, rfqLiquidity);
+
+        // Then
+        assertEq(token1.balanceOf(taker), 900);
+        assertEq(token2.balanceOf(taker), 1100);
+        assertEq(token1.balanceOf(maker), 1100);
+        assertEq(token2.balanceOf(maker), 900);
+    }
+
+    function testMatchTakerToManyMakers() external {
+        // The taker is the maker for this order
+        (
+          LibNativeOrder.OtcOrder memory takerOrder,
+          LibSignature.Signature memory takerSignature
+        ) = getOrderAndSignature(
+            taker,
+            address(token1),
+            100,
+            NULL_ADDRESS,
+            address(token2),
+            100
+        );
+
+        // Maker Order #1 (best price, but cannot cover full amount)
+        (
+          LibNativeOrder.OtcOrder memory makerOrder,
+          LibSignature.Signature memory makerSignature
+        ) = getOrderAndSignature(
+            maker,
+            address(token2),
+            84,
+            NULL_ADDRESS,
+            address(token1),
+            80
+        );
+
+        // Maker Order #2
+        (
+          LibNativeOrder.OtcOrder memory maker2Order,
+          LibSignature.Signature memory maker2Signature
+        ) = getOrderAndSignature(
+            maker2,
+            address(token2),
+            100,
+            NULL_ADDRESS,
+            address(token1),
+            100
+        );
+          
+        IOtcOrdersFeature.MatchingRfqLiquidity[] memory rfqLiquidity = new IOtcOrdersFeature.MatchingRfqLiquidity[](2);
+        rfqLiquidity[0] = IOtcOrdersFeature.MatchingRfqLiquidity({
+          makerOrder: makerOrder,
+          makerSignature: makerSignature,
+          settlementTakerAmount: 100,
+          settlementMakerAmount: 100
+        });
+
+        rfqLiquidity[1] = IOtcOrdersFeature.MatchingRfqLiquidity({
+          makerOrder: maker2Order,
+          makerSignature: maker2Signature,
+          settlementTakerAmount: 100,
+          settlementMakerAmount: 100
+        });
+
+
+        // When
+        vm.prank(worker, worker); // set the tx.origin
+        IZERO_EX.matchOtcOrders(takerOrder, takerSignature, rfqLiquidity);
+
+        // Then
+        assertEq(token1.balanceOf(taker), 900); // -100
+        assertEq(token1.balanceOf(maker), 1080); // +80
+        assertEq(token1.balanceOf(maker2), 1020); // +20
+
+        assertEq(token2.balanceOf(taker), 1102); // +102
+        assertEq(token2.balanceOf(maker), 918); // -82
+        assertEq(token2.balanceOf(maker2), 980); // -20
+    }
+
+}

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

@@ -0,0 +1,322 @@
+// 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";
+import "src/features/NativeOrdersFeature.sol";
+import "src/features/BatchFillNativeOrdersFeature.sol";
+import "src/features/FundRecoveryFeature.sol";
+import "src/features/TransformERC20Feature.sol";
+import "src/features/OtcOrdersFeature.sol";
+import "src/features/MetaTransactionsFeature.sol";
+import "src/features/nft_orders/ERC1155OrdersFeature.sol";
+import "src/features/nft_orders/ERC721OrdersFeature.sol";
+import "src/features/UniswapFeature.sol";
+import "src/features/multiplex/MultiplexFeature.sol";
+import "src/external/TransformerDeployer.sol";
+import "src/external/FeeCollectorController.sol";
+import "src/transformers/WethTransformer.sol";
+import "src/transformers/FillQuoteTransformer.sol";
+import "src/transformers/PayTakerTransformer.sol";
+import "src/transformers/AffiliateFeeTransformer.sol";
+import "src/transformers/PositiveSlippageFeeTransformer.sol";
+import "src/transformers/bridges/IBridgeAdapter.sol";
+import "src/transformers/bridges/EthereumBridgeAdapter.sol";
+
+import "@0x/contracts-erc20/contracts/src/v06/IEtherTokenV06.sol";
+import "@0x/contracts-erc20/contracts/src/v06/WETH9V06.sol";
+
+
+contract DeployZeroEx is Test {
+    ZeroEx public ZERO_EX = ZeroEx(0xDef1C0ded9bec7F1a1670819833240f027b25EfF);
+    IZeroEx public IZERO_EX = IZeroEx(address(ZERO_EX));
+    address VANITY_DEPLOYER_ADDRESS = 0xe750ad66DE350F8110E305fb78Ec6A9f594445E3;
+    bytes deployerBytecode = hex"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";
+
+    address[] transformerSigners = [
+        address(this)
+    ];
+
+    bool isDeployed = false;
+
+    struct Features {
+        NativeOrdersFeature nativeOrdersFeature;
+        BatchFillNativeOrdersFeature batchFillNativeOrdersFeature;
+        OtcOrdersFeature otcOrdersFeature;
+        UniswapFeature uniswapFeature;
+        // UniswapV3Feature
+        FundRecoveryFeature fundRecoveryFeature;
+        TransformERC20Feature transformERC20Feature;
+        MetaTransactionsFeature metaTransactionsFeature;
+        ERC1155OrdersFeature erc1155OrdersFeature;
+        ERC721OrdersFeature erc721OrdersFeature;
+        MultiplexFeature multiplexFeature;
+    }
+
+    struct Transformers {
+        FillQuoteTransformer fillQuoteTransformer;
+        WethTransformer wethTransformer;
+        AffiliateFeeTransformer affiliateFeeTransformer;
+        PayTakerTransformer payTakerTransformer;
+    }
+
+    struct ZeroExDeployed {
+        IZeroEx zeroEx;
+
+        TransformerDeployer transformerDeployer;
+        FeeCollectorController feeCollectorController;
+        IStaking staking; // address(0)
+        // Features
+        Features features;
+
+        // Transformers
+        Transformers transformers;
+
+        IEtherTokenV06 weth;
+    }
+
+    ZeroExDeployed ZERO_EX_DEPLOYED;
+
+    function getDeployedZeroEx()
+        public
+        returns (ZeroExDeployed memory)
+    {
+        if (!isDeployed) {
+            deployZeroEx();
+        }
+        return ZERO_EX_DEPLOYED;
+    }
+
+    function logDeployedZeroEx()
+        public
+    {
+        emit log_string("--- Deployed ZeroEx ---");
+        emit log_named_address("ZeroEx", address(ZERO_EX));
+        emit log_named_address("TransformerDeployer", address(ZERO_EX_DEPLOYED.transformerDeployer));
+        emit log_named_address("FeeCollectorController", address(ZERO_EX_DEPLOYED.feeCollectorController));
+        emit log_named_address("Staking", address(ZERO_EX_DEPLOYED.staking));
+
+        emit log_string("----- Features -----");
+        emit log_named_address("NativeOrdersFeature", address(ZERO_EX_DEPLOYED.features.nativeOrdersFeature));
+        emit log_named_address("BatchFillNativeOrdersFeature", address(ZERO_EX_DEPLOYED.features.batchFillNativeOrdersFeature));
+        emit log_named_address("OtcOrdersFeature", address(ZERO_EX_DEPLOYED.features.otcOrdersFeature));
+        emit log_named_address("UniswapFeature", address(ZERO_EX_DEPLOYED.features.uniswapFeature));
+        emit log_named_address("FundRecoveryFeature", address(ZERO_EX_DEPLOYED.features.fundRecoveryFeature));
+        emit log_named_address("MetaTransactionsFeature", address(ZERO_EX_DEPLOYED.features.metaTransactionsFeature));
+        emit log_named_address("ERC1155OrdersFeature", address(ZERO_EX_DEPLOYED.features.erc1155OrdersFeature));
+        emit log_named_address("ERC721OrdersFeature", address(ZERO_EX_DEPLOYED.features.erc721OrdersFeature));
+        emit log_named_address("TransformERC20Feature", address(ZERO_EX_DEPLOYED.features.transformERC20Feature));
+        emit log_named_address("MultiplexFeature", address(ZERO_EX_DEPLOYED.features.multiplexFeature));
+
+        emit log_string("----- Transformers -----");
+        emit log_named_address("FillQuoteTransformer", address(ZERO_EX_DEPLOYED.transformers.fillQuoteTransformer));
+        emit log_named_address("WethTransformer", address(ZERO_EX_DEPLOYED.transformers.wethTransformer));
+        emit log_named_address("AffiliateFeeTransformer", address(ZERO_EX_DEPLOYED.transformers.affiliateFeeTransformer));
+        emit log_named_address("PayTakerTransformer", address(ZERO_EX_DEPLOYED.transformers.payTakerTransformer));
+
+        emit log_string("----- Other -----");
+        emit log_named_address("WETH", address(ZERO_EX_DEPLOYED.weth));
+    }
+
+    function deployZeroEx()
+        public
+        returns (ZeroExDeployed memory)
+    {
+        if (isDeployed) {
+            return ZERO_EX_DEPLOYED;
+        }
+
+        ZERO_EX_DEPLOYED.weth = IEtherTokenV06(address(new WETH9V06()));
+        InitialMigration initialMigration = new InitialMigration(address(this));
+        // Append the required ZeroEx constructor arguments (address bootstrapper)
+        bytes memory zeroExDeploycode = abi.encodePacked(
+            type(ZeroEx).creationCode,
+            abi.encode(initialMigration)
+        );
+        // Append the required deployer code constructor arguments (bytes initCode)
+        bytes memory deployerDeploycode = abi.encodePacked(
+            deployerBytecode,
+            abi.encode(zeroExDeploycode)
+        );
+        // 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.
+        // Must occur from this address as the first transaction
+        // The address is technically emitted in an event, but we know we did it correctly
+        //│   │   ├─  emit topic 0: 0xf40fcec21964ffb566044d083b4073f29f7f7929110ea19e1b3ebe375d89055e
+        //│   │   │           data: 0x000000000000000000000000def1c0ded9bec7f1a1670819833240f027b25eff
+        hoax(VANITY_DEPLOYER_ADDRESS);
+        assembly {
+            pop(create(0, add(deployerDeploycode, 0x20), mload(deployerDeploycode)))
+        }
+        // Staking = address(0);
+        ZERO_EX_DEPLOYED.staking = IStaking(address(0));
+        ZERO_EX_DEPLOYED.transformerDeployer = new TransformerDeployer(
+            transformerSigners
+        );
+        ZERO_EX_DEPLOYED.feeCollectorController = new FeeCollectorController(
+            IEtherTokenV06(ZERO_EX_DEPLOYED.weth),
+            IStaking(ZERO_EX_DEPLOYED.staking)
+        );
+
+        
+        // Features
+        ZERO_EX_DEPLOYED.features.transformERC20Feature = new TransformERC20Feature();
+        ZERO_EX_DEPLOYED.features.nativeOrdersFeature = new NativeOrdersFeature(
+                address(ZERO_EX), // EP address
+                ZERO_EX_DEPLOYED.weth,
+                ZERO_EX_DEPLOYED.staking,
+                ZERO_EX_DEPLOYED.feeCollectorController, // feeCollectorController address
+                uint32(0) // protocolFeeMultiplier
+            );
+        ZERO_EX_DEPLOYED.features.batchFillNativeOrdersFeature = new BatchFillNativeOrdersFeature(
+            address(ZERO_EX)
+        );
+        ZERO_EX_DEPLOYED.features.otcOrdersFeature = new OtcOrdersFeature(
+            address(ZERO_EX),
+            ZERO_EX_DEPLOYED.weth
+        );
+        ZERO_EX_DEPLOYED.features.uniswapFeature = new UniswapFeature(ZERO_EX_DEPLOYED.weth);
+        ZERO_EX_DEPLOYED.features.fundRecoveryFeature = new FundRecoveryFeature();
+        ZERO_EX_DEPLOYED.features.metaTransactionsFeature = new MetaTransactionsFeature(address(ZERO_EX));
+        ZERO_EX_DEPLOYED.features.erc1155OrdersFeature = new ERC1155OrdersFeature(address(ZERO_EX), ZERO_EX_DEPLOYED.weth);
+        ZERO_EX_DEPLOYED.features.erc721OrdersFeature = new ERC721OrdersFeature(address(ZERO_EX), ZERO_EX_DEPLOYED.weth);
+        ZERO_EX_DEPLOYED.features.multiplexFeature = new MultiplexFeature(
+            address(ZERO_EX),
+            ZERO_EX_DEPLOYED.weth,
+            ILiquidityProviderSandbox(address(0)),
+            address(0), // uniswapFactory
+            address(0), // sushiswapFactory 
+            bytes32(0), // uniswapPairInitCodeHash
+            bytes32(0) // sushiswapPairInitCodeHash
+        );
+
+        initialMigration.initializeZeroEx(
+            payable(address(this)),
+            ZERO_EX,
+            InitialMigration.BootstrapFeatures({ 
+                registry: new SimpleFunctionRegistryFeature(), 
+                ownable: new OwnableFeature()
+            })
+        );
+        IZERO_EX.migrate(
+            address(ZERO_EX_DEPLOYED.features.batchFillNativeOrdersFeature),
+            abi.encodeWithSelector(BatchFillNativeOrdersFeature.migrate.selector),
+            address(this)
+        );
+        IZERO_EX.migrate(
+            address(ZERO_EX_DEPLOYED.features.transformERC20Feature),
+            abi.encodeWithSelector(TransformERC20Feature.migrate.selector, address(ZERO_EX_DEPLOYED.transformerDeployer)),
+            address(this)
+        );
+        IZERO_EX.migrate(
+            address(ZERO_EX_DEPLOYED.features.nativeOrdersFeature),
+            abi.encodeWithSelector(NativeOrdersFeature.migrate.selector),
+            address(this)
+        );
+        IZERO_EX.migrate(
+            address(ZERO_EX_DEPLOYED.features.otcOrdersFeature),
+            abi.encodeWithSelector(OtcOrdersFeature.migrate.selector),
+            address(this)
+        );
+        IZERO_EX.migrate(
+            address(ZERO_EX_DEPLOYED.features.uniswapFeature),
+            abi.encodeWithSelector(UniswapFeature.migrate.selector),
+            address(this)
+        );
+        IZERO_EX.migrate(
+            address(ZERO_EX_DEPLOYED.features.fundRecoveryFeature),
+            abi.encodeWithSelector(FundRecoveryFeature.migrate.selector),
+            address(this)
+        );
+        IZERO_EX.migrate(
+            address(ZERO_EX_DEPLOYED.features.metaTransactionsFeature),
+            abi.encodeWithSelector(MetaTransactionsFeature.migrate.selector),
+            address(this)
+        );
+        IZERO_EX.migrate(
+            address(ZERO_EX_DEPLOYED.features.erc1155OrdersFeature),
+            abi.encodeWithSelector(ERC1155OrdersFeature.migrate.selector),
+            address(this)
+        );
+        IZERO_EX.migrate(
+            address(ZERO_EX_DEPLOYED.features.erc721OrdersFeature),
+            abi.encodeWithSelector(ERC721OrdersFeature.migrate.selector),
+            address(this)
+        );
+        IZERO_EX.migrate(
+            address(ZERO_EX_DEPLOYED.features.multiplexFeature),
+            abi.encodeWithSelector(MultiplexFeature.migrate.selector),
+            address(this)
+        );
+
+        // Transformers
+        ZERO_EX_DEPLOYED.transformers.wethTransformer = WethTransformer(
+            ZERO_EX_DEPLOYED.transformerDeployer.deploy(
+                abi.encodePacked(
+                    // Deploy the WethTransformer code
+                    type(WethTransformer).creationCode,
+                    // WethTransformer takes WETH address as a constructor argument
+                    abi.encode(address(ZERO_EX_DEPLOYED.weth))
+                )
+            )
+        );
+
+        // Deploy the FQT, NOTE: No bridge adapter in tests
+        ZERO_EX_DEPLOYED.transformers.fillQuoteTransformer = FillQuoteTransformer(
+            ZERO_EX_DEPLOYED.transformerDeployer.deploy(
+                abi.encodePacked(
+                    // Deploy the FQT code
+                    type(FillQuoteTransformer).creationCode,
+                    // FQT takes a BridgeAdapter and ZeroEx
+                    abi.encode(
+                        address(0), // Note: No BridgeAdapter in tests
+                        INativeOrdersFeature(address(ZERO_EX))
+                    )
+                )
+            )
+        );
+
+        ZERO_EX_DEPLOYED.transformers.affiliateFeeTransformer = AffiliateFeeTransformer(
+            ZERO_EX_DEPLOYED.transformerDeployer.deploy(
+                type(AffiliateFeeTransformer).creationCode
+            )
+        );
+
+        ZERO_EX_DEPLOYED.transformers.payTakerTransformer = PayTakerTransformer(
+            ZERO_EX_DEPLOYED.transformerDeployer.deploy(
+                type(PayTakerTransformer).creationCode
+            )
+        );
+
+        ZERO_EX_DEPLOYED.zeroEx = IZERO_EX;
+        isDeployed = true;
+        logDeployedZeroEx();
+        return ZERO_EX_DEPLOYED;
+    }
+}

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

@@ -18,13 +18,19 @@
 */
 
 pragma solidity ^0.6;
+pragma experimental ABIEncoderV2;
 
 import "forge-std/Test.sol";
 
-contract ContractTest is Test {
-    function setUp() public {}
 
-    function testExample() public {
+contract ForkUtils is Test {
-      assertTrue(true);
+    /// 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/utils/TestERC20.sol

@@ -0,0 +1,11 @@
+// SPDX-License-Identifier: MIT
+pragma solidity ^0.6;
+
+import "openzeppelin-contracts/token/ERC20/ERC20.sol";
+
+contract TestERC20 is ERC20("Test ERC20", "TEST") {
+    function mint(address to, uint256 amount) external returns (bool) {
+        _mint(to, amount);
+        return true;
+    }
+}

contracts/zero-ex/contracts/test/foundry/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

@@ -1,4 +1,4 @@
-[default]
+[profile.default]
 src = 'contracts/src'
 out = 'foundry-artifacts'
 test = 'contracts/test/foundry'
@@ -6,3 +6,4 @@ libs = ["contracts/deps/", "../utils/contracts/src/"]
 remappings = ['@0x/contracts-utils/=../utils/', '@0x/contracts-erc20/=../erc20/', 'src/=./contracts/src']
 cache_path = 'foundry-cache'
 optimizer_runs = 1000000
+

contracts/zero-ex/package.json

@@ -15,6 +15,7 @@
         "build:ts": "tsc -b",
         "pre_build": "run-s compile contracts:gen generate_contract_wrappers contracts:copy",
         "test": "yarn run_mocha",
+        "forge": "forge test -vvv",
         "rebuild_and_test": "run-s build test",
         "test:coverage": "SOLIDITY_COVERAGE=true run-s build run_mocha coverage:report:text coverage:report:lcov",
         "test:profiler": "SOLIDITY_PROFILER=true run-s build run_mocha profiler:report:html",
@@ -39,7 +40,8 @@
         "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",
-        "typechain": "typechain --target=ethers-v5 --out-dir='typechain-wrappers'  './foundry-artifacts/**/*.json'"
+        "typechain": "typechain --target=ethers-v5 --out-dir='typechain-wrappers'  './foundry-artifacts/**/*.json'",
+        "foundry:SU": "git submodule update --init --recursive"
     },
     "config": {
         "publicInterfaceContracts": "IZeroEx,ZeroEx,FullMigration,InitialMigration,IFlashWallet,IERC20Transformer,IOwnableFeature,ISimpleFunctionRegistryFeature,ITransformERC20Feature,FillQuoteTransformer,PayTakerTransformer,PositiveSlippageFeeTransformer,WethTransformer,OwnableFeature,SimpleFunctionRegistryFeature,TransformERC20Feature,AffiliateFeeTransformer,MetaTransactionsFeature,LogMetadataTransformer,LiquidityProviderFeature,ILiquidityProviderFeature,NativeOrdersFeature,INativeOrdersFeature,FeeCollectorController,FeeCollector,CurveLiquidityProvider,BatchFillNativeOrdersFeature,IBatchFillNativeOrdersFeature,MultiplexFeature,IMultiplexFeature,OtcOrdersFeature,IOtcOrdersFeature,AvalancheBridgeAdapter,BSCBridgeAdapter,CeloBridgeAdapter,EthereumBridgeAdapter,FantomBridgeAdapter,OptimismBridgeAdapter,PolygonBridgeAdapter",