commit 077ad78fd70471fb5b5507ece093582b270c7fe7
parent da82c8aa355fef89390c5541fa24caa95e7b8d73
Author: lash <dev@holbrook.no>
Date: Fri, 5 May 2023 09:27:17 +0100
Add python harness, fix call sigs in contract
Diffstat:
18 files changed, 1169 insertions(+), 212 deletions(-)
diff --git a/.gitignore b/.gitignore
@@ -0,0 +1,5 @@
+__pycache__
+*.pyc
+build/
+solidity/*.bin
+solidity/*.json
diff --git a/python/LICENSE b/python/LICENSE
@@ -0,0 +1,661 @@
+ GNU AFFERO GENERAL PUBLIC LICENSE
+ Version 3, 19 November 2007
+
+ Copyright (C) 2007 Free Software Foundation, Inc. <https://fsf.org/>
+ Everyone is permitted to copy and distribute verbatim copies
+ of this license document, but changing it is not allowed.
+
+ Preamble
+
+ The GNU Affero General Public License is a free, copyleft license for
+software and other kinds of works, specifically designed to ensure
+cooperation with the community in the case of network server software.
+
+ The licenses for most software and other practical works are designed
+to take away your freedom to share and change the works. By contrast,
+our General Public Licenses are 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.
+
+ 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.
+
+ Developers that use our General Public Licenses protect your rights
+with two steps: (1) assert copyright on the software, and (2) offer
+you this License which gives you legal permission to copy, distribute
+and/or modify the software.
+
+ A secondary benefit of defending all users' freedom is that
+improvements made in alternate versions of the program, if they
+receive widespread use, become available for other developers to
+incorporate. Many developers of free software are heartened and
+encouraged by the resulting cooperation. However, in the case of
+software used on network servers, this result may fail to come about.
+The GNU General Public License permits making a modified version and
+letting the public access it on a server without ever releasing its
+source code to the public.
+
+ The GNU Affero General Public License is designed specifically to
+ensure that, in such cases, the modified source code becomes available
+to the community. It requires the operator of a network server to
+provide the source code of the modified version running there to the
+users of that server. Therefore, public use of a modified version, on
+a publicly accessible server, gives the public access to the source
+code of the modified version.
+
+ An older license, called the Affero General Public License and
+published by Affero, was designed to accomplish similar goals. This is
+a different license, not a version of the Affero GPL, but Affero has
+released a new version of the Affero GPL which permits relicensing under
+this license.
+
+ 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 Affero 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. Remote Network Interaction; Use with the GNU General Public License.
+
+ Notwithstanding any other provision of this License, if you modify the
+Program, your modified version must prominently offer all users
+interacting with it remotely through a computer network (if your version
+supports such interaction) an opportunity to receive the Corresponding
+Source of your version by providing access to the Corresponding Source
+from a network server at no charge, through some standard or customary
+means of facilitating copying of software. This Corresponding Source
+shall include the Corresponding Source for any work covered by version 3
+of the GNU General Public License that is incorporated pursuant to the
+following paragraph.
+
+ 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 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 work with which it is combined will remain governed by version
+3 of the GNU General Public License.
+
+ 14. Revised Versions of this License.
+
+ The Free Software Foundation may publish revised and/or new versions of
+the GNU Affero 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 Affero 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 Affero 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 Affero 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 Affero 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 Affero General Public License for more details.
+
+ You should have received a copy of the GNU Affero General Public License
+ along with this program. If not, see <https://www.gnu.org/licenses/>.
+
+Also add information on how to contact you by electronic and paper mail.
+
+ If your software can interact with users remotely through a computer
+network, you should also make sure that it provides a way for users to
+get its source. For example, if your program is a web application, its
+interface could display a "Source" link that leads users to an archive
+of the code. There are many ways you could offer source, and different
+solutions will be better for different programs; see section 13 for the
+specific requirements.
+
+ 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 AGPL, see
+<https://www.gnu.org/licenses/>.
diff --git a/python/evm_tokenvote/__init__.py b/python/evm_tokenvote/__init__.py
@@ -0,0 +1 @@
+from .voter import Voter
diff --git a/python/evm_tokenvote/data/Voter.bin b/python/evm_tokenvote/data/Voter.bin
@@ -0,0 +1 @@
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
+\ No newline at end of file
diff --git a/python/evm_tokenvote/data/Voter.json b/python/evm_tokenvote/data/Voter.json
@@ -0,0 +1 @@
+[{"inputs":[{"internalType":"address","name":"_token","type":"address"},{"internalType":"address","name":"_accountsRegistry","type":"address"}],"stateMutability":"nonpayable","type":"constructor"},{"anonymous":false,"inputs":[{"indexed":true,"internalType":"uint256","name":"_blockDeadline","type":"uint256"},{"indexed":true,"internalType":"uint256","name":"voteTargetPpm","type":"uint256"},{"indexed":true,"internalType":"uint256","name":"_proposalIdx","type":"uint256"}],"name":"ProposalAdded","type":"event"},{"inputs":[{"internalType":"address","name":"","type":"address"}],"name":"balanceOf","outputs":[{"internalType":"uint256","name":"","type":"uint256"}],"stateMutability":"view","type":"function"},{"inputs":[],"name":"currentProposal","outputs":[{"internalType":"uint256","name":"","type":"uint256"}],"stateMutability":"view","type":"function"},{"inputs":[],"name":"finalize","outputs":[{"internalType":"bool","name":"","type":"bool"}],"stateMutability":"nonpayable","type":"function"},{"inputs":[{"internalType":"uint256","name":"","type":"uint256"}],"name":"proposals","outputs":[{"internalType":"bytes32","name":"description","type":"bytes32"},{"internalType":"uint256","name":"supply","type":"uint256"},{"internalType":"uint256","name":"total","type":"uint256"},{"internalType":"uint256","name":"blockDeadline","type":"uint256"},{"internalType":"uint24","name":"targetVotePpm","type":"uint24"},{"internalType":"address","name":"proposer","type":"address"},{"internalType":"uint8","name":"state","type":"uint8"},{"internalType":"uint8","name":"scanCursor","type":"uint8"}],"stateMutability":"view","type":"function"},{"inputs":[{"internalType":"bytes32","name":"_description","type":"bytes32"},{"internalType":"uint256","name":"_blockWait","type":"uint256"},{"internalType":"uint24","name":"_targetVotePpm","type":"uint24"}],"name":"propose","outputs":[{"internalType":"uint256","name":"","type":"uint256"}],"stateMutability":"nonpayable","type":"function"},{"inputs":[{"internalType":"bytes32","name":"_description","type":"bytes32"},{"internalType":"bytes32[]","name":"_options","type":"bytes32[]"},{"internalType":"uint256","name":"_blockWait","type":"uint256"},{"internalType":"uint24","name":"_targetVotePpm","type":"uint24"}],"name":"proposeMulti","outputs":[{"internalType":"uint256","name":"","type":"uint256"}],"stateMutability":"nonpayable","type":"function"},{"inputs":[],"name":"recover","outputs":[{"internalType":"uint256","name":"","type":"uint256"}],"stateMutability":"nonpayable","type":"function"},{"inputs":[{"internalType":"uint256","name":"_proposalIndex","type":"uint256"},{"internalType":"uint8","name":"_count","type":"uint8"}],"name":"scan","outputs":[{"internalType":"bool","name":"","type":"bool"}],"stateMutability":"nonpayable","type":"function"},{"inputs":[],"name":"token","outputs":[{"internalType":"address","name":"","type":"address"}],"stateMutability":"view","type":"function"},{"inputs":[{"internalType":"uint256","name":"_optionIndex","type":"uint256"},{"internalType":"uint256","name":"_value","type":"uint256"}],"name":"vote","outputs":[{"internalType":"bool","name":"","type":"bool"}],"stateMutability":"nonpayable","type":"function"}]
diff --git a/python/evm_tokenvote/data/Voter.metadata.json b/python/evm_tokenvote/data/Voter.metadata.json
@@ -0,0 +1 @@
+{"compiler":{"version":"0.8.19+commit.7dd6d404"},"language":"Solidity","output":{"abi":[{"inputs":[{"internalType":"address","name":"_token","type":"address"},{"internalType":"address","name":"_accountsRegistry","type":"address"}],"stateMutability":"nonpayable","type":"constructor"},{"anonymous":false,"inputs":[{"indexed":true,"internalType":"uint256","name":"_blockDeadline","type":"uint256"},{"indexed":true,"internalType":"uint256","name":"voteTargetPpm","type":"uint256"},{"indexed":true,"internalType":"uint256","name":"_proposalIdx","type":"uint256"}],"name":"ProposalAdded","type":"event"},{"inputs":[{"internalType":"address","name":"","type":"address"}],"name":"balanceOf","outputs":[{"internalType":"uint256","name":"","type":"uint256"}],"stateMutability":"view","type":"function"},{"inputs":[],"name":"currentProposal","outputs":[{"internalType":"uint256","name":"","type":"uint256"}],"stateMutability":"view","type":"function"},{"inputs":[],"name":"finalize","outputs":[{"internalType":"bool","name":"","type":"bool"}],"stateMutability":"nonpayable","type":"function"},{"inputs":[{"internalType":"uint256","name":"","type":"uint256"}],"name":"proposals","outputs":[{"internalType":"bytes32","name":"description","type":"bytes32"},{"internalType":"uint256","name":"supply","type":"uint256"},{"internalType":"uint256","name":"total","type":"uint256"},{"internalType":"uint256","name":"blockDeadline","type":"uint256"},{"internalType":"uint24","name":"targetVotePpm","type":"uint24"},{"internalType":"address","name":"proposer","type":"address"},{"internalType":"uint8","name":"state","type":"uint8"},{"internalType":"uint8","name":"scanCursor","type":"uint8"}],"stateMutability":"view","type":"function"},{"inputs":[{"internalType":"bytes32","name":"_description","type":"bytes32"},{"internalType":"uint256","name":"_blockWait","type":"uint256"},{"internalType":"uint24","name":"_targetVotePpm","type":"uint24"}],"name":"propose","outputs":[{"internalType":"uint256","name":"","type":"uint256"}],"stateMutability":"nonpayable","type":"function"},{"inputs":[{"internalType":"bytes32","name":"_description","type":"bytes32"},{"internalType":"bytes32[]","name":"_options","type":"bytes32[]"},{"internalType":"uint256","name":"_blockWait","type":"uint256"},{"internalType":"uint24","name":"_targetVotePpm","type":"uint24"}],"name":"proposeMulti","outputs":[{"internalType":"uint256","name":"","type":"uint256"}],"stateMutability":"nonpayable","type":"function"},{"inputs":[],"name":"recover","outputs":[{"internalType":"uint256","name":"","type":"uint256"}],"stateMutability":"nonpayable","type":"function"},{"inputs":[{"internalType":"uint256","name":"_proposalIndex","type":"uint256"},{"internalType":"uint8","name":"_count","type":"uint8"}],"name":"scan","outputs":[{"internalType":"bool","name":"","type":"bool"}],"stateMutability":"nonpayable","type":"function"},{"inputs":[],"name":"token","outputs":[{"internalType":"address","name":"","type":"address"}],"stateMutability":"view","type":"function"},{"inputs":[{"internalType":"uint256","name":"_optionIndex","type":"uint256"},{"internalType":"uint256","name":"_value","type":"uint256"}],"name":"vote","outputs":[{"internalType":"bool","name":"","type":"bool"}],"stateMutability":"nonpayable","type":"function"}],"devdoc":{"kind":"dev","methods":{},"version":1},"userdoc":{"kind":"user","methods":{},"version":1}},"settings":{"compilationTarget":{"Voter.sol":"ERC20Vote"},"evmVersion":"byzantium","libraries":{},"metadata":{"bytecodeHash":"ipfs"},"optimizer":{"enabled":false,"runs":200},"remappings":[]},"sources":{"Voter.sol":{"keccak256":"0xde0c2d2b93eb1b8395ddda127f03853fd72fc50c4f03b2111bd12ad8174c54aa","license":"AGPL-3.0-or-later","urls":["bzz-raw://21663dac73fcb74ebbcba9da995c20ce56cfad1612ca106d53c84c21193aceb1","dweb:/ipfs/QmcrAcJBtKZmj1aqGH3uicbDEGBYwZqi9H52PXMJCbE4qa"]}},"version":1}
diff --git a/python/evm_tokenvote/data/__init__.py b/python/evm_tokenvote/data/__init__.py
@@ -0,0 +1,3 @@
+import os
+
+data_dir = os.path.realpath(os.path.dirname(__file__))
diff --git a/python/evm_tokenvote/unittest/__init__.py b/python/evm_tokenvote/unittest/__init__.py
@@ -0,0 +1 @@
+from .base import *
diff --git a/python/evm_tokenvote/unittest/base.py b/python/evm_tokenvote/unittest/base.py
@@ -0,0 +1,42 @@
+# standard imports
+import logging
+import time
+
+# external imports
+from chainlib.eth.unittest.ethtester import EthTesterCase
+from chainlib.connection import RPCConnection
+from chainlib.eth.nonce import RPCNonceOracle
+from chainlib.eth.tx import receipt
+from chainlib.eth.address import to_checksum_address
+
+# local imports
+from eth_erc20 import ERC20
+from giftable_erc20_token.unittest import TestGiftableToken
+from evm_tokenvote import Voter
+
+logg = logging.getLogger(__name__)
+
+
+class TestEvmVote(TestGiftableToken):
+
+ expire = 0
+
+ def setUp(self):
+ super(TestEvmVote, self).setUp()
+ self.conn = RPCConnection.connect(self.chain_spec, 'default')
+
+ c = ERC20(self.chain_spec)
+ o = c.total_supply(self.address, sender_address=self.accounts[0])
+ r = self.rpc.do(o)
+ supply = int(r, 16)
+ self.assertGreater(supply, 0)
+
+ nonce_oracle = RPCNonceOracle(self.accounts[0], conn=self.conn)
+ c = Voter(self.chain_spec, signer=self.signer, nonce_oracle=nonce_oracle)
+ (tx_hash, o) = c.constructor(self.accounts[0], self.address)
+ self.rpc.do(o)
+ o = receipt(tx_hash)
+ r = self.rpc.do(o)
+ self.assertEqual(r['status'], 1)
+ self.voter_address = to_checksum_address(r['contract_address'])
+ logg.debug('published voter on address {} with hash {}'.format(self.voter_address, tx_hash))
diff --git a/python/evm_tokenvote/voter.py b/python/evm_tokenvote/voter.py
@@ -0,0 +1,99 @@
+# standard imports
+import logging
+import os
+
+# external imports
+from chainlib.eth.constant import ZERO_ADDRESS
+from chainlib.eth.contract import (
+ ABIContractEncoder,
+ ABIContractDecoder,
+ ABIContractType,
+ abi_decode_single,
+)
+from chainlib.eth.jsonrpc import to_blockheight_param
+from chainlib.eth.error import RequestMismatchException
+from chainlib.eth.tx import (
+ TxFactory,
+ TxFormat,
+)
+from chainlib.jsonrpc import JSONRPCRequest
+from chainlib.block import BlockSpec
+from hexathon import (
+ add_0x,
+ strip_0x,
+)
+
+# local imports
+from evm_tokenvote.data import data_dir
+
+logg = logging.getLogger()
+
+
+class Voter(TxFactory):
+
+ __abi = None
+ __bytecode = None
+
+ def constructor(self, sender_address, token_address, accounts_registry_address=None, tx_format=TxFormat.JSONRPC, version=None):
+ code = self.cargs(token_address, accounts_registry_address=accounts_registry_address)
+ tx = self.template(sender_address, None, use_nonce=True)
+ tx = self.set_code(tx, code)
+ return self.finalize(tx, tx_format)
+
+
+ @staticmethod
+ def cargs(token_address, accounts_registry_address=None, version=None):
+ if accounts_registry_address == None:
+ accounts_registry_address = ZERO_ADDRESS
+ if token_address == None:
+ raise ValueError("token address cannot be zero address")
+ code = Voter.bytecode(version=version)
+ enc = ABIContractEncoder()
+ enc.address(token_address)
+ enc.address(accounts_registry_address)
+ args = enc.get()
+ code += args
+ logg.debug('constructor code: ' + args)
+ return code
+
+
+ @staticmethod
+ def gas(code=None):
+ return 4000000
+
+
+
+ @staticmethod
+ def abi():
+ if Voter.__abi == None:
+ f = open(os.path.join(data_dir, 'Voter.json'), 'r')
+ Voter.__abi = json.load(f)
+ f.close()
+ return Voter.__abi
+
+
+ @staticmethod
+ def bytecode(version=None):
+ if Voter.__bytecode == None:
+ f = open(os.path.join(data_dir, 'Voter.bin'))
+ Voter.__bytecode = f.read()
+ f.close()
+ return Voter.__bytecode
+
+
+
+ def propose(self, contract_address, sender_address, description, block_deadline, target_vote_ppm=500000, tx_format=TxFormat.JSONRPC, id_generator=None):
+ enc = ABIContractEncoder()
+ enc.method('propose')
+ enc.typ(ABIContractType.BYTES32)
+ enc.typ(ABIContractType.UINT256)
+ enc.typ_literal('uint24')
+ enc.bytes32(description)
+ enc.uint256(block_deadline)
+ enc.uintn(target_vote_ppm, 24)
+ data = add_0x(enc.get())
+ tx = self.template(sender_address, contract_address, use_nonce=True)
+ tx = self.set_code(tx, data)
+ tx = self.finalize(tx, tx_format, id_generator=id_generator)
+ return tx
+
diff --git a/python/requirements.txt b/python/requirements.txt
@@ -0,0 +1,2 @@
+eth-erc20~=0.7.3
+chainlib-eth~=0.4.18
diff --git a/python/setup.cfg b/python/setup.cfg
@@ -0,0 +1,39 @@
+[metadata]
+name = craft-nft
+version = 0.2.0
+description = A standalone NFT implementation for real-world arts and crafts assets
+author = Louis Holbrook
+author_email = dev@holbrook.no
+url = https://git.defalslfy.org/craft-nft,git
+keywords =
+ dlt
+ blockchain
+ cryptocurrency
+ ethereum
+classifiers =
+ Programming Language :: Python :: 3
+ Operating System :: OS Independent
+ Development Status :: 3 - Alpha
+ Topic :: Software Development :: Libraries
+ Environment :: Console
+ Intended Audience :: Developers
+ License :: OSI Approved :: GNU Affero General Public License v3 or later (AGPLv3+)
+ Topic :: Internet
+# Topic :: Blockchain :: EVM
+license = AGPLv3+
+licence_files =
+ LICENSE
+
+[options]
+include_package_data = True
+python_requires = >= 3.7
+packages =
+ craft_nft
+ craft_nft.runnable
+
+[options.entry_points]
+console_scripts =
+ craftnft-publish = craft_nft.runnable.publish:main
+ craftnft-dump = craft_nft.runnable.dump:main
+ craftnft-allocate = craft_nft.runnable.allocate:main
+ craftnft-mint = craft_nft.runnable.mint:main
diff --git a/python/setup.py b/python/setup.py
@@ -0,0 +1,26 @@
+from setuptools import setup
+import os
+
+
+requirements = []
+f = open('requirements.txt', 'r')
+while True:
+ l = f.readline()
+ if l == '':
+ break
+ requirements.append(l.rstrip())
+f.close()
+
+test_requirements = []
+f = open('test_requirements.txt', 'r')
+while True:
+ l = f.readline()
+ if l == '':
+ break
+ test_requirements.append(l.rstrip())
+f.close()
+
+setup(
+ install_requires=requirements,
+ tests_require=test_requirements,
+ )
diff --git a/python/test_requirements.txt b/python/test_requirements.txt
@@ -0,0 +1,4 @@
+eth_tester==0.5.0b3
+py-evm==0.3.0a20
+eth-interface==0.1.1
+eth-accounts-index~=0.5.1
diff --git a/python/tests/test_base.py b/python/tests/test_base.py
@@ -0,0 +1,29 @@
+# standard imports
+import unittest
+import logging
+import os
+from chainlib.eth.nonce import RPCNonceOracle
+from chainlib.eth.tx import receipt
+
+# local imports
+from evm_tokenvote.unittest import TestEvmVote
+from evm_tokenvote import Voter
+
+
+logging.basicConfig(level=logging.DEBUG)
+
+class TestVoteBase(TestEvmVote):
+
+ def test_propose(self):
+ description = os.urandom(32).hex()
+ nonce_oracle = RPCNonceOracle(self.accounts[1], conn=self.conn)
+ c = Voter(self.chain_spec, signer=self.signer, nonce_oracle=nonce_oracle)
+ (tx_hash, o) = c.propose(self.voter_address, self.accounts[1], description, 100)
+ self.rpc.do(o)
+ o = receipt(tx_hash)
+ r = self.rpc.do(o)
+ self.assertEqual(r['status'], 1)
+
+
+if __name__ == '__main__':
+ unittest.main()
diff --git a/solidity/Makefile b/solidity/Makefile
@@ -0,0 +1,12 @@
+SOLC = /usr/bin/solc
+
+all:
+ $(SOLC) --bin Voter.sol --evm-version byzantium | awk 'NR>3' > Voter.bin
+ $(SOLC) --abi Voter.sol --evm-version byzantium | awk 'NR>3' > Voter.json
+ $(SOLC) --metadata Voter.sol --evm-version byzantium | awk 'NR>3' > Voter.metadata.json
+ truncate -s -1 Voter.bin
+
+install: all
+ cp -v *.json ../python/evm_tokenvote/data/
+ cp -v *.bin ../python/evm_tokenvote/data/
+
diff --git a/solidity/Vote.sol b/solidity/Vote.sol
@@ -1,212 +0,0 @@
-pragma solidity ^0.8.0;
-
-// Author: Louis Holbrook <dev@holbrook.no> 0826EDA1702D1E87C6E2875121D2E7BB88C2A746
-// SPDX-License-Identifier: AGPL-3.0-or-later
-// File-Version: 1
-// Description: Voting contract using ERC20 tokens as shares
-
-contract ERC20Vote {
- uint8 constant STATE_FINAL = 1;
- uint8 constant STATE_SCANNED = 2;
- uint8 constant STATE_INSUFFICIENT = 4;
- uint8 constant STATE_TIED = 8;
- uint8 constant STATE_SUPPLYCHANGE = 16;
-
- address public token;
-
- struct Proposal {
- bytes32 description;
- bytes32 []options;
- uint256 []optionVotes;
- uint256 supply;
- uint256 total;
- uint256 blockDeadline;
- uint24 targetVotePpm;
- address proposer;
- uint8 state;
- uint8 scanCursor;
- }
-
- Proposal[] public proposals;
-
- uint256 public currentProposal;
-
- mapping ( address => uint256 ) public balanceOf;
- mapping ( address => uint256 ) proposalIdxLock;
-
- event ProposalAdded(uint256 indexed _blockDeadline, uint256 indexed voteTargetPpm, uint256 indexed _proposalIdx);
-
- constructor(address _token) {
- token = _token;
- }
-
- // Propose a vote on the subject described by digest.
- function propose(bytes32 _description, bytes32[] calldata _options, uint256 _blockDeadline, uint24 _targetVotePpm) public returns (uint256) {
- Proposal memory l_proposal;
- uint256 l_proposalIndex;
-
- require(_options.length < 256, "ERR_TOO_MANY_OPTIONS");
- l_proposal.proposer = msg.sender;
- l_proposal.description = _description;
- l_proposal.options = _options;
- l_proposal.targetVotePpm = _targetVotePpm;
- l_proposal.blockDeadline = _blockDeadline;
- l_proposalIndex = proposals.length;
- proposals.push(l_proposal);
- l_proposal.supply = checkSupply(proposals[l_proposalIndex]);
-
- emit ProposalAdded(_blockDeadline, _targetVotePpm, l_proposalIndex);
- return l_proposalIndex;
- }
-
- // Cast votes on an option by locking ERC20 token in contract.
- // Votes may be divided on several options.
- // If false is returned, proposal has been invalidated.
- function vote(uint256 _optionIndex, uint256 _value) public returns (bool) {
- Proposal storage proposal;
- bool r;
- bytes memory v;
-
- proposal = proposals[currentProposal];
- if (checkSupply(proposal) == 0) {
- return false;
- }
- require(proposal.blockDeadline < block.number, "ERR_DEADLINE");
- if (proposalIdxLock[msg.sender] > 0) {
- require(proposalIdxLock[msg.sender] == currentProposal, "ERR_RECOVER_FIRST");
- }
- require(_optionIndex < proposal.options.length, "ERR_OPTION_INVALID");
-
- (r, v) = token.call(abi.encodeWithSignature('transferFrom', msg.sender, this, _value));
- require(r, "ERR_TOKEN");
- r = abi.decode(v, (bool));
- require(r, "ERR_TRANSFER");
-
- proposalIdxLock[msg.sender] = currentProposal;
- balanceOf[msg.sender] += _value;
- proposal.total += _value;
- proposal.optionVotes[_optionIndex] += _value;
- return true;
- }
-
- // Optionally scan the results for a proposal to make result visible.
- // Returns false as long as there are more options to scan.
- function scan(uint256 _proposalIndex, uint8 _count) public returns (bool) {
- Proposal storage proposal;
- uint8 i;
- uint16 lead;
- uint256 hi;
- uint256 score;
- uint8 c;
- uint8 state;
-
- proposal = proposals[_proposalIndex];
- require(proposal.blockDeadline <= block.number, "ERR_PREMATURE");
- if (proposal.state & STATE_SCANNED > 0) {
- return false;
- }
-
- c = proposal.scanCursor;
- if (c + _count > proposal.options.length) {
- _count = uint8(proposal.options.length) - c;
- }
-
- _count += c;
- state = proposal.state;
- for (i = c; i < _count; i++) {
- score = proposal.optionVotes[i];
- if (score > 0 && score == hi) {
- state |= STATE_TIED;
- } else if (score > hi) {
- hi = score;
- lead = i;
- state &= ~STATE_TIED;
- }
- c += 1;
- }
- proposal.scanCursor = c;
- proposal.state = state;
- if (proposal.scanCursor < proposal.options.length) {
- proposal.state |= STATE_SCANNED;
- }
- return proposal.state & STATE_SCANNED > 0;
- }
-
- // finalize the results after scanning for winning result.
- // will record and return whether voting participation was insufficient.
- function finalize() public returns (bool) {
- Proposal storage proposal;
- uint256 l_total_m;
- uint256 l_supply_m;
-
- proposal = proposals[currentProposal];
- require(proposal.state & STATE_FINAL == 0, "ERR_ALREADY_STATE_FINAL");
- require(proposal.state & STATE_SCANNED == 0, "ERR_SCAN_FIRST");
- if (checkSupply(proposal) == 0) {
- return false;
- }
- proposal.state |= STATE_FINAL;
- currentProposal += 1;
-
- l_total_m = proposal.total * 1000000;
- l_supply_m = proposal.supply * 1000000;
-
- if (l_supply_m / l_total_m < proposal.targetVotePpm) {
- proposal.state |= STATE_INSUFFICIENT;
- return false;
-
- }
- return true;
- }
-
- // should be checked for proposal creation, each recorded vote and finalization.
- function checkSupply(Proposal storage proposal) private returns (uint256) {
- bool r;
- bytes memory v;
- uint256 l_supply;
-
- (r, v) = token.call(abi.encodeWithSignature('totalSupply'));
- require(r, "ERR_TOKEN");
- l_supply = abi.decode(v, (uint256));
-
- require(l_supply > 0, "ERR_ZERO_SUPPLY");
- if (proposal.supply == 0) {
- proposal.supply = l_supply;
- } else {
- proposal.state |= STATE_SUPPLYCHANGE;
- proposal.state |= STATE_FINAL;
- currentProposal += 1;
- return 0;
- }
-
- return l_supply;
- }
-
- // Recover tokens from a finished vote or from an active vote before deadline.
- function recover() public returns (uint256) {
- Proposal storage proposal;
- bool r;
- bytes memory v;
- uint256 l_value;
-
- proposal = proposals[currentProposal];
-
- l_value = balanceOf[msg.sender];
- if (proposalIdxLock[msg.sender] == currentProposal) {
- if (proposal.blockDeadline <= block.number) {
- require(proposal.state & STATE_FINAL == 0, "ERR_PREMATURE");
- } else {
- proposal.total -= l_value;
- }
- }
-
- balanceOf[msg.sender] = 0;
- proposalIdxLock[msg.sender] = 0;
- (r, v) = token.call(abi.encodeWithSignature('transfer', msg.sender, l_value));
- require(r, "ERR_TOKEN");
- r = abi.decode(v, (bool));
- require(r, "ERR_TRANSFER");
-
- return l_value;
- }
-}
diff --git a/solidity/Voter.sol b/solidity/Voter.sol
@@ -0,0 +1,241 @@
+pragma solidity ^0.8.0;
+
+// Author: Louis Holbrook <dev@holbrook.no> 0826EDA1702D1E87C6E2875121D2E7BB88C2A746
+// SPDX-License-Identifier: AGPL-3.0-or-later
+// File-Version: 1
+// Description: Voting contract using ERC20 tokens as shares
+
+// TODO: how to cancel vote prematurely
+// TODO: voter registration vote, to enforce 50% per-entity cap rule
+
+contract ERC20Vote {
+ uint8 constant STATE_FINAL = 1;
+ uint8 constant STATE_SCANNED = 2;
+ uint8 constant STATE_INSUFFICIENT = 4;
+ uint8 constant STATE_TIED = 8;
+ uint8 constant STATE_SUPPLYCHANGE = 16;
+
+ address public token;
+
+ struct Proposal {
+ bytes32 description;
+ bytes32 []options;
+ uint256 []optionVotes;
+ uint256 supply;
+ uint256 total;
+ uint256 blockDeadline;
+ uint24 targetVotePpm;
+ address proposer;
+ uint8 state;
+ uint8 scanCursor;
+ }
+
+ Proposal[] public proposals;
+ address accountsRegistry;
+
+ uint256 public currentProposal;
+
+ mapping ( address => uint256 ) public balanceOf;
+ mapping ( address => uint256 ) proposalIdxLock;
+
+ event ProposalAdded(uint256 indexed _blockDeadline, uint256 indexed voteTargetPpm, uint256 indexed _proposalIdx);
+
+ constructor(address _token, address _accountsRegistry) {
+ token = _token;
+ accountsRegistry = _accountsRegistry;
+ }
+
+ // Propose a vote on the subject described by digest.
+ function proposeMulti(bytes32 _description, bytes32[] memory _options, uint256 _blockWait, uint24 _targetVotePpm) public returns (uint256) {
+ Proposal memory l_proposal;
+ uint256 l_proposalIndex;
+ uint256 l_blockDeadline;
+
+ require(_options.length < 256, "ERR_TOO_MANY_OPTIONS");
+ l_proposal.proposer = msg.sender;
+ l_proposal.description = _description;
+ l_proposal.options = _options;
+ l_proposal.targetVotePpm = _targetVotePpm;
+ l_blockDeadline = block.number + _blockWait;
+ l_proposal.blockDeadline = l_blockDeadline;
+ l_proposalIndex = proposals.length;
+ proposals.push(l_proposal);
+ l_proposal.supply = checkSupply(proposals[l_proposalIndex]);
+
+ emit ProposalAdded(l_blockDeadline, _targetVotePpm, l_proposalIndex);
+ return l_proposalIndex;
+ }
+
+ function propose(bytes32 _description, uint256 _blockWait, uint24 _targetVotePpm) public returns (uint256) {
+ bytes32[] memory options;
+
+ return proposeMulti(_description, options, _blockWait, _targetVotePpm);
+ }
+
+ // reverts on unregistered account if an accounts registry has been added.
+ function mustAccount(address _account) private {
+ bool r;
+ bytes memory v;
+
+ if (accountsRegistry == address(0)) {
+ return;
+ }
+
+ (r, v) = accountsRegistry.call(abi.encodeWithSignature('have(address)', _account));
+ require(r, "ERR_REGISTRY");
+ r = abi.decode(v, (bool));
+ require(r, "ERR_UNAUTH_ACCOUNT");
+ }
+
+ // Cast votes on an option by locking ERC20 token in contract.
+ // Votes may be divided on several options.
+ // If false is returned, proposal has been invalidated.
+ function vote(uint256 _optionIndex, uint256 _value) public returns (bool) {
+ Proposal storage proposal;
+ bool r;
+ bytes memory v;
+
+ mustAccount(msg.sender);
+ proposal = proposals[currentProposal];
+ if (checkSupply(proposal) == 0) {
+ return false;
+ }
+ require(proposal.blockDeadline < block.number, "ERR_DEADLINE");
+ if (proposalIdxLock[msg.sender] > 0) {
+ require(proposalIdxLock[msg.sender] == currentProposal, "ERR_RECOVER_FIRST");
+ }
+ require(_optionIndex < proposal.options.length, "ERR_OPTION_INVALID");
+
+ (r, v) = token.call(abi.encodeWithSignature('transferFrom(address,address,uint256)', msg.sender, this, _value));
+ require(r, "ERR_TOKEN");
+ r = abi.decode(v, (bool));
+ require(r, "ERR_TRANSFER");
+
+ proposalIdxLock[msg.sender] = currentProposal;
+ balanceOf[msg.sender] += _value;
+ proposal.total += _value;
+ proposal.optionVotes[_optionIndex] += _value;
+ return true;
+ }
+
+ // Optionally scan the results for a proposal to make result visible.
+ // Returns false as long as there are more options to scan.
+ function scan(uint256 _proposalIndex, uint8 _count) public returns (bool) {
+ Proposal storage proposal;
+ uint8 i;
+ uint16 lead;
+ uint256 hi;
+ uint256 score;
+ uint8 c;
+ uint8 state;
+
+ proposal = proposals[_proposalIndex];
+ require(proposal.blockDeadline <= block.number, "ERR_PREMATURE");
+ if (proposal.state & STATE_SCANNED > 0) {
+ return false;
+ }
+
+ c = proposal.scanCursor;
+ if (c + _count > proposal.options.length) {
+ _count = uint8(proposal.options.length) - c;
+ }
+
+ _count += c;
+ state = proposal.state;
+ for (i = c; i < _count; i++) {
+ score = proposal.optionVotes[i];
+ if (score > 0 && score == hi) {
+ state |= STATE_TIED;
+ } else if (score > hi) {
+ hi = score;
+ lead = i;
+ state &= ~STATE_TIED;
+ }
+ c += 1;
+ }
+ proposal.scanCursor = c;
+ proposal.state = state;
+ if (proposal.scanCursor < proposal.options.length) {
+ proposal.state |= STATE_SCANNED;
+ }
+ return proposal.state & STATE_SCANNED > 0;
+ }
+
+ // finalize the results after scanning for winning result.
+ // will record and return whether voting participation was insufficient.
+ function finalize() public returns (bool) {
+ Proposal storage proposal;
+ uint256 l_total_m;
+ uint256 l_supply_m;
+
+ proposal = proposals[currentProposal];
+ require(proposal.state & STATE_FINAL == 0, "ERR_ALREADY_STATE_FINAL");
+ require(proposal.state & STATE_SCANNED == 0, "ERR_SCAN_FIRST");
+ if (checkSupply(proposal) == 0) {
+ return false;
+ }
+ proposal.state |= STATE_FINAL;
+ currentProposal += 1;
+
+ l_total_m = proposal.total * 1000000;
+ l_supply_m = proposal.supply * 1000000;
+
+ if (l_supply_m / l_total_m < proposal.targetVotePpm) {
+ proposal.state |= STATE_INSUFFICIENT;
+ return false;
+
+ }
+ return true;
+ }
+
+ // should be checked for proposal creation, each recorded vote and finalization.
+ function checkSupply(Proposal storage proposal) private returns (uint256) {
+ bool r;
+ bytes memory v;
+ uint256 l_supply;
+
+ (r, v) = token.call(abi.encodeWithSignature('totalSupply()'));
+ require(r, "ERR_TOKEN");
+ l_supply = abi.decode(v, (uint256));
+
+ require(l_supply > 0, "ERR_ZERO_SUPPLY");
+ if (proposal.supply == 0) {
+ proposal.supply = l_supply;
+ } else {
+ proposal.state |= STATE_SUPPLYCHANGE;
+ proposal.state |= STATE_FINAL;
+ currentProposal += 1;
+ return 0;
+ }
+
+ return l_supply;
+ }
+
+ // Recover tokens from a finished vote or from an active vote before deadline.
+ function recover() public returns (uint256) {
+ Proposal storage proposal;
+ bool r;
+ bytes memory v;
+ uint256 l_value;
+
+ proposal = proposals[currentProposal];
+
+ l_value = balanceOf[msg.sender];
+ if (proposalIdxLock[msg.sender] == currentProposal) {
+ if (proposal.blockDeadline <= block.number) {
+ require(proposal.state & STATE_FINAL == 0, "ERR_PREMATURE");
+ } else {
+ proposal.total -= l_value;
+ }
+ }
+
+ balanceOf[msg.sender] = 0;
+ proposalIdxLock[msg.sender] = 0;
+ (r, v) = token.call(abi.encodeWithSignature('transfer(address,uint256)', msg.sender, l_value));
+ require(r, "ERR_TOKEN");
+ r = abi.decode(v, (bool));
+ require(r, "ERR_TRANSFER");
+
+ return l_value;
+ }
+}
