diff --git a/.gitignore b/.gitignore new file mode 100644 index 00000000..4e905e7c --- /dev/null +++ b/.gitignore @@ -0,0 +1,2 @@ +*.avm +/vendor/ diff --git a/LICENSE.md b/LICENSE.md new file mode 100644 index 00000000..2fb2e74d --- /dev/null +++ b/LICENSE.md @@ -0,0 +1,675 @@ +### GNU GENERAL PUBLIC LICENSE + +Version 3, 29 June 2007 + +Copyright (C) 2007 Free Software Foundation, Inc. + + +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. 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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. 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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. 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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. 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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. 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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. + + + Copyright (C) + + 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 . + +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: + + Copyright (C) + 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 . + +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 . diff --git a/Makefile b/Makefile new file mode 100644 index 00000000..17946ba9 --- /dev/null +++ b/Makefile @@ -0,0 +1,11 @@ +PACKAGE=github.com/nspcc-dev/neofs-contract +NEOGO?=neo-go + +.PHONY: build tests + +build: + $(NEOGO) contract compile -i neofs_contract.go + +tests: + go mod vendor + go test -mod=vendor -v -race $(PACKAGE) diff --git a/README.md b/README.md new file mode 100644 index 00000000..859698e1 --- /dev/null +++ b/README.md @@ -0,0 +1,103 @@ +# NeoFS smart-contract + +This smart-contract controls list of NeoFS Inner Ring nodes and provides +methods to deposit and withdraw assets. These assets are used as a payment and +a reward for data storage. + + +## Getting Started + +This repository contains: + +- NeoFS smart-contract written in Go +- Unit tests for the smart-contract + +### Prerequisites + +To compile smart-contract you need: + +- [neo-go](https://github.com/nspcc-dev/neo-go) >= 0.74.0 + + +To run tests you need: + +- [go](https://golang.org/dl/) >= 1.12 + +## Compiling + +To compile smart contract run `make build` command. Compiled contract +`neofs_contract.avm` will be placed in the same directory. + +``` +$ make build +neo-go contract compile -i neofs_contract.go +02a600c56b6a007bc46a517bc468164e656f2e52756e74696d652e476574547269676765726165880d9e640700006c756668164e656f2e53746f726167652e476574436f6e74657874616a527bc46a00c376064465706c6f798764c7016a52c30d496e6e657252696e674c6973747c657c0d6a537bc46a5 +3c3c000a0642f0019636f6e747261637420616c7265616479206465706c6f796564680f4e656f2e52756e74696d652e4c6f67f06a51c3c06a547bc46a54c35297009e6448003270726f76696465207061697273206f6620696e6e65722072696e67206164647265737320616e64207075626c6963206b65 +... +c46a00c36a59c37c6592fd6476006a52c36a5ac36a59c3ad6469006a58c38b6a587bc4006a5b7bc46a5bc36a57c3c09f6444006a57c36a5bc3c36a59c387642b00156475706c6963617465207075626c6963206b657973680f4e656f2e52756e74696d652e4c6f67f06a5bc38b6a5b7bc462b7ff6a57c36 +a59c3787cc86a577bc46a53c30161936a537bc46234ff6a58c36a56c3a2640700516c75661e6e6f7420656e6f756768207665726966696564207369676e617475726573680f4e656f2e52756e74696d652e4c6f6761006c7566 +$ ls neofs_contract.avm +neofs_contract.avm +``` + +You can specify path to the `neo-go` binary with `NEOGO` environment variable: + +``` +$ NEOGO=/home/user/neo-go/bin/neo-go make build +``` + +## Running the tests + +`neofs_contract_test.go` file contains tests for most of the provided methods. +It compiles smart-contract and uses instance of the NeoVM to run +code. + +To test smart contract run `make tests` command. + +``` +$ make tests +go mod vendor +go test -mod=vendor -v -race github.com/nspcc-dev/neofs-contract +=== RUN TestContract + TestContract: neofs_contract_test.go:360: provide pairs of inner ring address and public key + TestContract: neofs_contract_test.go:360: contract already deployed +=== RUN TestContract/InnerRingAddress + TestContract: neofs_contract_test.go:360: target element has been removed +=== RUN TestContract/Deposit + TestContract: neofs_contract_test.go:360: funds have been transfered +=== RUN TestContract/Withdraw +=== RUN TestContract/Withdraw/Double_Withdraw + TestContract: neofs_contract_test.go:360: verification check has already been used +=== RUN TestContract/InnerRingCandidateAdd +=== RUN TestContract/InnerRingCandidateAdd/Double_InnerRingCandidateAdd + TestContract: neofs_contract_test.go:360: is already in list +=== RUN TestContract/InnerRingCandidateRemove +=== RUN TestContract/InnerRingCandidateRemove/Remove_unknown_candidate + TestContract: neofs_contract_test.go:360: target element has not been removed + TestContract: neofs_contract_test.go:360: target element has not been removed +=== RUN TestContract/InnerRingUpdate + TestContract/InnerRingUpdate: neofs_contract_test.go:174: implement getIRExcludeCheque without neofs-node dependency +--- PASS: TestContract (0.43s) + --- PASS: TestContract/InnerRingAddress (0.00s) + --- PASS: TestContract/Deposit (0.00s) + --- PASS: TestContract/Withdraw (0.01s) + --- PASS: TestContract/Withdraw/Double_Withdraw (0.00s) + --- PASS: TestContract/InnerRingCandidateAdd (0.00s) + --- PASS: TestContract/InnerRingCandidateAdd/Double_InnerRingCandidateAdd (0.00s) + --- PASS: TestContract/InnerRingCandidateRemove (0.00s) + --- PASS: TestContract/InnerRingCandidateRemove/Remove_unknown_candidate (0.00s) + --- SKIP: TestContract/InnerRingUpdate (0.00s) +PASS +ok github.com/nspcc-dev/neofs-contract 0.453s +``` + +### Skipped tests + +Some tests might be skipped for now. These tests used `neofs-node` +structures, that are not publicly available yet, e.g. cheque for +`InnerRingUpdate` call. + +## License + +This project is licensed under the GPLv3 License - see the +[LICENSE.md](LICENSE.md) file for details diff --git a/go.mod b/go.mod new file mode 100644 index 00000000..d0e2ed3f --- /dev/null +++ b/go.mod @@ -0,0 +1,11 @@ +module github.com/nspcc-dev/neofs-contract + +go 1.12 + +require ( + github.com/multiformats/go-multiaddr v0.2.1 + github.com/nspcc-dev/neo-go v0.74.0 + github.com/nspcc-dev/neofs-api-go v0.5.0 + github.com/nspcc-dev/neofs-crypto v0.3.0 + github.com/stretchr/testify v1.5.1 +) diff --git a/go.sum b/go.sum new file mode 100644 index 00000000..40ff7c69 --- /dev/null +++ b/go.sum @@ -0,0 +1,305 @@ +cloud.google.com/go v0.26.0/go.mod h1:aQUYkXzVsufM+DwF1aE+0xfcU+56JwCaLick0ClmMTw= +github.com/BurntSushi/toml v0.3.1/go.mod h1:xHWCNGjB5oqiDr8zfno3MHue2Ht5sIBksp03qcyfWMU= +github.com/CityOfZion/neo-go 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"github.com/nspcc-dev/neo-go/pkg/interop/crypto" + "github.com/nspcc-dev/neo-go/pkg/interop/engine" + "github.com/nspcc-dev/neo-go/pkg/interop/runtime" + "github.com/nspcc-dev/neo-go/pkg/interop/storage" + "github.com/nspcc-dev/neo-go/pkg/interop/util" +) + +type node struct { + addr []byte + pub []byte +} + +type check struct { + id []byte + height []byte +} + +// GAS NEP-5 HASH +const tokenHash = "\x77\xea\x59\x6b\x7a\xdf\x7e\x4d\xd1\x40\x76\x97\x31\xb7\xd2\xf0\xe0\x6b\xcd\x9b" + +const innerRingCandidateFee = 100 * 1000 * 1000 // 10^8 + +const version = 1 + +func Main(op string, args []interface{}) interface{} { + // The trigger determines whether this smart-contract is being + // run in 'verification' or 'application' mode. + if runtime.GetTrigger() != runtime.Application() { + return false + } + + /* + Utility operations - they will be changed in production: + - Deploy(params: address, pubKey, ... ) - setup initial inner ring state + + User operations: + - InnerRingList() - get list of inner ring nodes addresses and public keys + - InnerRingAddress(params: address, pubKey) - update address of the inner ring node with given public key + - InnerRingCandidateRemove(params: pubKey) - remove node with given public key from the inner ring candidate queue + - InnerRingCandidateAdd(params: address, pubKey) - add node to the inner ring candidate queue + - Deposit(params: pubKey, amount) - deposit GAS to the NeoFS account + - Withdraw(params: withdrawCheque) - withdraw GAS from the NeoFS account + - InnerRingUpdate(params: irCheque) - change list of inner ring nodes + - Version() - get version of the NeoFS smart-contract + + Params: + - address - string of the valid multiaddress (github.com/multiformats/multiaddr) + - pubKey - 33 byte public key + - withdrawCheque - serialized structure, that confirms GAS transfer; + contains inner ring signatures + - irCheque - serialized structure, that confirms new inner ring node list; + contains inner ring signatures + + */ + + ctx := storage.GetContext() + switch op { + case "Deploy": + irList := getSerialized(ctx, "InnerRingList").([]node) + if len(irList) >= 3 { + panic("contract already deployed") + } + + ln := len(args) + if ln%2 != 0 { + panic("provide pairs of inner ring address and public key") + } + + irList = []node{} + for i := 0; i < ln/2; i++ { + addr := args[i*2].([]byte) + pub := args[i*2+1].([]byte) + irList = append(irList, node{addr: addr, pub: pub}) + } + + data := runtime.Serialize(irList) + storage.Put(ctx, "InnerRingList", data) + + data = runtime.Serialize([]interface{}{}) + storage.Put(ctx, "UsedVerifCheckList", data) + storage.Put(ctx, "InnerRingCandidates", data) + + return true + case "InnerRingList": + irList := getSerialized(ctx, "InnerRingList").([]node) + + return irList + case "InnerRingAddress": + addr := args[0].([]byte) + pub := args[1].([]byte) + irList := getSerialized(ctx, "InnerRingList").([]node) + if !containsPub(irList, pub) { + panic("inner ring node does not exist") + } + + if runtime.CheckWitness(pub) { + n := node{addr: addr, pub: pub} + + delSerializedIR(ctx, "InnerRingList", pub) + putSerialized(ctx, "InnerRingList", n) + } + + return true + case "InnerRingCandidateRemove": + data := args[0].([]byte) // public key + if !runtime.CheckWitness(data) { + panic("you should be the owner of the public key") + } + + delSerializedIR(ctx, "InnerRingCandidates", data) + + return true + case "InnerRingCandidateAdd": + addr := args[0].([]byte) // valid multiaddr string + data := args[1].([]byte) // public key + + if !runtime.CheckWitness(data) { + panic("you should be the owner of the public key") + } + + candidates := getSerialized(ctx, "InnerRingCandidates").([]node) + if containsPub(candidates, data) { + panic("is already in list") + } + + from := pubToScriptHash(data) + to := engine.GetExecutingScriptHash() + params := []interface{}{from, to, innerRingCandidateFee} + + transferred := engine.AppCall([]byte(tokenHash), "transfer", params).(bool) + if !transferred { + panic("failed to transfer funds, aborting") + } + + candidate := node{ + addr: addr, + pub: data, + } + if !putSerialized(ctx, "InnerRingCandidates", candidate) { + panic("failed to put candidate into the queue") + } + + return true + case "Deposit": + pk := args[0].([]byte) + if !runtime.CheckWitness(pk) { + panic("you should be the owner of the public key") + } + + amount := args[1].(int) + if amount > 0 { + amount = amount * 100000000 + } + + from := pubToScriptHash(pk) + to := engine.GetExecutingScriptHash() + params := []interface{}{from, to, amount} + transferred := engine.AppCall([]byte(tokenHash), "transfer", params).(bool) + if !transferred { + panic("failed to transfer funds, aborting") + } + + runtime.Log("funds have been transferred") + + return true + case "Withdraw": + from := engine.GetExecutingScriptHash() + data := args[0].([]byte) + message := data[0:66] + uuid := data[0:25] + owner := data[25:50] + value := data[50:58] + height := data[58:66] + offset := 68 + usedList := getSerialized(ctx, "UsedVerifCheckList").([]check) + + c := check{ + id: uuid, + height: height, + } + if containsCheck(usedList, c) { + panic("verification check has already been used") + } + + irList := getSerialized(ctx, "InnerRingList").([]node) + if !verifySignatures(irList, data, message, offset) { + panic("can't verify signatures") + } + + h := owner[1:21] + params := []interface{}{from, h, value} + transferred := engine.AppCall([]byte(tokenHash), "transfer", params).(bool) + if !transferred { + panic("failed to transfer funds, aborting") + } + + putSerialized(ctx, "UsedVerifCheckList", c) + + return true + case "InnerRingUpdate": + data := args[0].([]byte) + + id := data[:8] + var ln interface{} = data[8:10] + listItemCount := ln.(int) + listSize := listItemCount * 33 + + offset := 8 + 2 + listSize + msg := data[:offset] + message := crypto.SHA256(msg) + + irList := getSerialized(ctx, "InnerRingList").([]node) + if !verifySignatures(irList, data, message, offset) { + panic("can't verify signatures") + } + + usedList := getSerialized(ctx, "UsedVerifCheckList").([]check) + c := check{ + id: id, + height: []byte{1}, // ir update cheques use height as id + } + if containsCheck(usedList, c) { + panic("check has already been used") + } + + candidates := getSerialized(ctx, "InnerRingCandidates").([]node) + offset = 10 + newIR := []node{} + + for i := 0; i < listItemCount; i++ { + pub := data[offset : offset+33] + + finished := false + + for j := 0; j < len(irList); j++ { + n := irList[j] + if util.Equals(n.pub, pub) { + newIR = append(newIR, n) + finished = true + break + } + } + + if !finished { + for j := 0; j < len(candidates); j++ { + n := candidates[j] + if util.Equals(n.pub, pub) { + newIR = append(newIR, n) + finished = true + break + } + } + if !finished { + panic("unknown inner ring candidate present in the list") + } + } + offset += 33 + } + if len(newIR) != listItemCount { + panic("new inner ring wasn't processed correctly") + } + + for i := 0; i < len(newIR); i++ { + n := newIR[i] + delSerializedIR(ctx, "InnerRingCandidates", n.pub) + } + + newIRData := runtime.Serialize(newIR) + storage.Put(ctx, "InnerRingList", newIRData) + putSerialized(ctx, "UsedVerifCheckList", c) + + return true + case "Version": + return version + } + + panic("unknown operation") +} + +func getSerialized(ctx storage.Context, key string) interface{} { + data := storage.Get(ctx, key).([]byte) + if len(data) != 0 { + return runtime.Deserialize(data) + } + return nil +} + +func delSerialized(ctx storage.Context, key string, value []byte) bool { + data := storage.Get(ctx, key).([]byte) + deleted := false + + var newList [][]byte + if len(data) != 0 { + lst := runtime.Deserialize(data).([][]byte) + for i := 0; i < len(lst); i++ { + if util.Equals(value, lst[i]) { + deleted = true + } else { + newList = append(newList, lst[i]) + } + } + if deleted { + if len(newList) != 0 { + data := runtime.Serialize(newList) + storage.Put(ctx, key, data) + } else { + storage.Delete(ctx, key) + } + runtime.Log("target element has been removed") + return true + } + + } + + runtime.Log("target element has not been removed") + return false +} + +func putSerialized(ctx storage.Context, key string, value interface{}) bool { + data := storage.Get(ctx, key).([]byte) + + var lst []interface{} + if len(data) != 0 { + lst = runtime.Deserialize(data).([]interface{}) + } + + lst = append(lst, value) + data = runtime.Serialize(lst) + storage.Put(ctx, key, data) + + return true +} + +func pubToScriptHash(pkey []byte) []byte { + pre := []byte{0x21} + buf := append(pre, pkey...) + buf = append(buf, 0xac) + h := crypto.Hash160(buf) + return h +} + +func containsCheck(lst []check, c check) bool { + for i := 0; i < len(lst); i++ { + if util.Equals(c, lst[i]) { + return true + } + } + return false +} +func containsPub(lst []node, elem []byte) bool { + for i := 0; i < len(lst); i++ { + e := lst[i] + if util.Equals(elem, e.pub) { + return true + } + } + return false +} + +func delSerializedIR(ctx storage.Context, key string, value []byte) bool { + data := storage.Get(ctx, key).([]byte) + deleted := false + + newList := []node{} + if len(data) != 0 { + lst := runtime.Deserialize(data).([]node) + for i := 0; i < len(lst); i++ { + n := lst[i] + if util.Equals(value, n.pub) { + deleted = true + } else { + newList = append(newList, n) + } + } + if deleted { + data := runtime.Serialize(newList) + storage.Put(ctx, key, data) + runtime.Log("target element has been removed") + return true + } + } + + runtime.Log("target element has not been removed") + return false +} +func verifySignatures(irList []node, data []byte, message []byte, offset int) bool { + n := len(irList) + f := (n - 1) / 3 + s := n - f + if s < 3 { + runtime.Log("not enough inner ring nodes for consensus") + return false + } + + used := [][]byte{} + count := 0 + for count < s && offset < len(data) { + pubkey := data[offset : offset+33] + signature := data[offset+33 : offset+97] + if containsPub(irList, pubkey) { + if crypto.VerifySignature(message, signature, pubkey) { + count++ + for i := 0; i < len(used); i++ { + if util.Equals(used[i], pubkey) { + panic("duplicate public keys") + } + } + used = append(used, pubkey) + } + } + offset += 97 + } + + if count >= s { + return true + } + + runtime.Log("not enough verified signatures") + return false +} diff --git a/neofs_contract_test.go b/neofs_contract_test.go new file mode 100644 index 00000000..1dc1474f --- /dev/null +++ b/neofs_contract_test.go @@ -0,0 +1,534 @@ +package smart_contract + +import ( + "bytes" + "crypto/ecdsa" + "crypto/elliptic" + "crypto/rand" + "encoding/hex" + "fmt" + "math/big" + "os" + "testing" + + "github.com/multiformats/go-multiaddr" + "github.com/nspcc-dev/neo-go/pkg/compiler" + "github.com/nspcc-dev/neo-go/pkg/crypto/keys" + "github.com/nspcc-dev/neo-go/pkg/io" + "github.com/nspcc-dev/neo-go/pkg/smartcontract/trigger" + "github.com/nspcc-dev/neo-go/pkg/util" + "github.com/nspcc-dev/neo-go/pkg/vm" + "github.com/nspcc-dev/neo-go/pkg/vm/emit" + "github.com/nspcc-dev/neofs-api-go/accounting" + "github.com/nspcc-dev/neofs-api-go/decimal" + "github.com/nspcc-dev/neofs-api-go/refs" + crypto "github.com/nspcc-dev/neofs-crypto" + "github.com/nspcc-dev/neofs-crypto/test" + "github.com/stretchr/testify/require" +) + +const contractTemplate = "./neofs_contract.go" + +var ( + contractHash = util.Uint160{0x1, 0x2, 0x3, 0x4} + // token hash is not random to run tests of .avm or .go files + contractStr = string(contractHash[:]) +) + +type contract struct { + script []byte + addrs []multiaddr.Multiaddr + privs []*ecdsa.PrivateKey + cgasHash string +} + +func TestContract(t *testing.T) { + const nodeCount = 6 + plug := newStoragePlugin(t) + contract := initGoContract(t, contractTemplate, nodeCount) + + plug.cgas[contractStr] = util.Fixed8FromInt64(1000) + + // fail if odd number of arguments provided + v := initVM(contract, plug) + loadArg(t, v, "Deploy", []interface{}{contract.addrs[0].String()}) + require.Error(t, v.Run()) + + // correct arguments + var args []interface{} + for i := range contract.addrs { + args = append(args, contract.addrs[i].String()) + args = append(args, crypto.MarshalPublicKey(&contract.privs[i].PublicKey)) + } + + v = initVM(contract, plug) + loadArg(t, v, "Deploy", args) + require.NoError(t, v.Run()) + + // double withdraw + v = initVM(contract, plug) + loadArg(t, v, "Deploy", args) + require.Error(t, v.Run()) + + t.Run("InnerRingAddress", func(t *testing.T) { + newAddr, err := multiaddr.NewMultiaddr("/dns6/fdb5:7305:0adf:0b0b::/tcp/8080") + require.NoError(t, err) + + previousAddr := contract.addrs[0] + key := crypto.MarshalPublicKey(&contract.privs[0].PublicKey) + + v := initVM(contract, plug) + loadArg(t, v, "InnerRingAddress", []interface{}{newAddr.String(), key}) + require.NoError(t, v.Run()) + require.False(t, bytes.Contains(plug.mem["InnerRingList"], []byte(previousAddr.String()))) + require.True(t, bytes.Contains(plug.mem["InnerRingList"], []byte(newAddr.String()))) + + contract.addrs[0] = newAddr + }) + + t.Run("Deposit", func(t *testing.T) { + v := initVM(contract, plug) + before := plug.cgas[contractStr] + + key := mustHex("031a6c6fbbdf02ca351745fa86b9ba5a9452d785ac4f7fc2b7548ca2a46c4fcf4a") + plug.setCGASBalance(key, 4000) + + loadArg(t, v, "Deposit", []interface{}{key, 1000}) + require.NoError(t, v.Run()) + + require.Equal(t, before+util.Fixed8FromInt64(1000), plug.cgas[contractStr]) + require.Equal(t, util.Fixed8FromInt64(3000), plug.cgas[string(mustPKey(key).GetScriptHash().BytesBE())]) + }) + + t.Run("Withdraw", func(t *testing.T) { + const amount = 21 + + v := initVM(contract, plug) + owner, cheque := getCheque(t, contract, amount) + ownerStr := string(owner[1:21]) + contractGas := plug.cgas[contractStr] + + loadArg(t, v, "Withdraw", []interface{}{cheque}) + require.NoError(t, v.Run()) + require.Equal(t, contractGas-util.Fixed8FromInt64(amount), plug.cgas[contractStr]) + require.Equal(t, util.Fixed8FromInt64(amount), plug.cgas[ownerStr]) + + t.Run("Double Withdraw", func(t *testing.T) { + v := initVM(contract, plug) + + loadArg(t, v, "Withdraw", []interface{}{cheque}) + require.Error(t, v.Run()) + }) + }) + + t.Run("InnerRingCandidateAdd", func(t *testing.T) { + v := initVM(contract, plug) + before := plug.cgas[contractStr] + + key := crypto.MarshalPublicKey(&test.DecodeKey(1).PublicKey) + plug.setCGASBalance(key, 4000) + + loadArg(t, v, "InnerRingCandidateAdd", []interface{}{"/ip6/2001:4860:4860::8888/tcp/80", key}) + require.NoError(t, v.Run()) + + fee := util.Fixed8FromInt64(1) + + require.Equal(t, before+fee, plug.cgas[contractStr]) + require.Equal(t, util.Fixed8FromInt64(4000)-fee, + plug.cgas[string(mustPKey(key).GetScriptHash().BytesBE())]) + require.True(t, bytes.Contains(plug.mem["InnerRingCandidates"], key)) + + t.Run("Double InnerRingCandidateAdd", func(t *testing.T) { + v := initVM(contract, plug) + loadArg(t, v, "InnerRingCandidateAdd", []interface{}{"/ip4/8.8.8.8/tcp/80", key}) + require.Error(t, v.Run()) + }) + }) + + t.Run("InnerRingCandidateRemove", func(t *testing.T) { + key := crypto.MarshalPublicKey(&test.DecodeKey(2).PublicKey) + plug.setCGASBalance(key, 4000) + + v := initVM(contract, plug) + loadArg(t, v, "InnerRingCandidateAdd", []interface{}{"/ip6/2001:4860:4860::8888/tcp/80", key}) + require.NoError(t, v.Run()) + require.True(t, bytes.Contains(plug.mem["InnerRingCandidates"], key)) + + t.Run("Remove unknown candidate", func(t *testing.T) { + v := initVM(contract, plug) + // unknown candidate + badKey := crypto.MarshalPublicKey(&test.DecodeKey(3).PublicKey) + loadArg(t, v, "InnerRingCandidateRemove", []interface{}{badKey}) + require.NoError(t, v.Run()) + require.True(t, bytes.Contains(plug.mem["InnerRingCandidates"], key)) + }) + + v = initVM(contract, plug) + key = mustHex("031a6c6fbbdf02ca351745fa86b9ba5a9452d785ac4f7fc2b7548ca2a46c4fcf4a") + loadArg(t, v, "InnerRingCandidateRemove", []interface{}{key}) + require.NoError(t, v.Run()) + require.False(t, bytes.Contains(plug.mem["InnerRingCandidates"], key)) + }) + + t.Run("InnerRingUpdate", func(t *testing.T) { + t.Skip("implement getIRExcludeCheque without neofs-node dependency") + + pubKey := &test.DecodeKey(4).PublicKey + key := crypto.MarshalPublicKey(pubKey) + plug.setCGASBalance(key, 4000) + + var pubs []*ecdsa.PublicKey + for i := 0; i < len(contract.privs)-1; i++ { + pubs = append(pubs, &contract.privs[i].PublicKey) + } + pubs = append(pubs, pubKey) + cheque := getIRExcludeCheque(t, contract, pubs, 777) + + t.Run("Try without candidate", func(t *testing.T) { + v := initVM(contract, plug) + loadArg(t, v, "InnerRingUpdate", []interface{}{cheque}) + require.Error(t, v.Run()) + }) + + v := initVM(contract, plug) + loadArg(t, v, "InnerRingCandidateAdd", []interface{}{"addrX", key}) + require.NoError(t, v.Run()) + + v = initVM(contract, plug) + loadArg(t, v, "InnerRingUpdate", []interface{}{cheque}) + require.NoError(t, v.Run()) + + for i := 0; i < len(contract.privs)-1; i++ { + require.True(t, bytes.Contains(plug.mem["InnerRingList"], + crypto.MarshalPublicKey(&contract.privs[i].PublicKey))) + } + require.True(t, bytes.Contains(plug.mem["InnerRingList"], key)) + + t.Run("Double InnerRingUpdate", func(t *testing.T) { + newCheque := getIRExcludeCheque(t, contract, pubs, 777) + v = initVM(contract, plug) + loadArg(t, v, "InnerRingUpdate", []interface{}{newCheque}) + require.Error(t, v.Run()) + }) + }) +} + +func getCheque(t *testing.T, c *contract, amount int64) (refs.OwnerID, []byte) { + id, err := accounting.NewChequeID() + require.NoError(t, err) + + priv, err := ecdsa.GenerateKey(elliptic.P256(), rand.Reader) + require.NoError(t, err) + + owner, err := refs.NewOwnerID(&priv.PublicKey) + require.NoError(t, err) + + cheque := accounting.Cheque{ + ID: id, + Owner: owner, + Amount: decimal.NewGAS(amount), + Height: 0, + } + + for _, key := range c.privs { + require.NoError(t, cheque.Sign(key)) + } + + data, err := cheque.MarshalBinary() + require.NoError(t, err) + + return owner, data +} + +func getIRExcludeCheque(t *testing.T, c *contract, pub []*ecdsa.PublicKey, id uint64) []byte { + panic("implement without neofs-node dependency") +} + +func initGoContract(t *testing.T, path string, n int) *contract { + f, err := os.Open(path) + require.NoError(t, err) + + defer f.Close() + + buf, err := compiler.Compile(f) + require.NoError(t, err) + + return &contract{script: buf, privs: getKeys(t, n), addrs: getAddrs(t, n)} +} + +func getKeys(t *testing.T, n int) []*ecdsa.PrivateKey { + privs := make([]*ecdsa.PrivateKey, n) + for i := range privs { + var err error + + privs[i], err = ecdsa.GenerateKey(elliptic.P256(), rand.Reader) + require.NoError(t, err) + } + + return privs +} + +func getAddrs(t *testing.T, n int) []multiaddr.Multiaddr { + const template = "/dns4/10.120.14.%d/tcp/8080" + + addrs := make([]multiaddr.Multiaddr, n) + for i := range addrs { + var err error + + addrs[i], err = multiaddr.NewMultiaddr(fmt.Sprintf(template, i)) + require.NoError(t, err) + } + + return addrs +} + +func mustHex(s string) []byte { + result, err := hex.DecodeString(s) + if err != nil { + panic(fmt.Errorf("invalid hex: %v", err)) + } + + return result +} + +func initVM(c *contract, plug *storagePlugin) *vm.VM { + v := vm.New() + v.Load(c.script) + v.SetScriptGetter(plug.getScript) + v.RegisterInteropGetter(plug.getInterop) + + return v +} + +func loadArg(t *testing.T, v *vm.VM, operation string, params []interface{}) { + arr := make([]vm.StackItem, len(params)) + for i := range arr { + arr[i] = toStackItem(params[i]) + require.NotNil(t, arr[i], "invalid stack item") + } + v.Estack().PushVal(vm.NewArrayItem(arr)) + v.Estack().PushVal(operation) +} + +func toStackItem(v interface{}) vm.StackItem { + switch val := v.(type) { + case int: + return vm.NewBigIntegerItem(val) + case string: + return vm.NewByteArrayItem([]byte(val)) + case []byte: + return vm.NewByteArrayItem(val) + default: + return nil + } +} + +const cgasSyscall = "MockCGAS" + +type kv struct { + Operation string + Key []byte + Value []byte +} + +type storagePlugin struct { + mem map[string][]byte + cgas map[string]util.Fixed8 + interops map[uint32]vm.InteropFunc + storageOps []kv + notify []interface{} +} + +func newStoragePlugin(t *testing.T) *storagePlugin { + s := &storagePlugin{ + mem: make(map[string][]byte), + cgas: make(map[string]util.Fixed8), + interops: make(map[uint32]vm.InteropFunc), + } + + s.interops[getID("Neo.Storage.Delete")] = s.Delete + s.interops[getID("Neo.Storage.Get")] = s.Get + s.interops[getID("Neo.Storage.GetContext")] = s.GetContext + s.interops[getID("Neo.Storage.Put")] = s.Put + s.interops[getID("Neo.Runtime.GetExecutingScriptHash")] = s.GetExecutingScriptHash + s.interops[getID("Neo.Runtime.GetTrigger")] = s.GetTrigger + s.interops[getID("Neo.Runtime.CheckWitness")] = s.CheckWitness + s.interops[getID("System.ExecutionEngine.GetExecutingScriptHash")] = s.GetExecutingScriptHash + s.interops[getID(cgasSyscall)] = s.CGASInvoke + s.interops[getID("Neo.Runtime.Log")] = func(v *vm.VM) error { + msg := string(v.Estack().Pop().Bytes()) + t.Log(msg) + return nil + } + s.interops[getID("Neo.Runtime.Notify")] = func(v *vm.VM) error { + val := v.Estack().Pop().Value() + s.notify = append(s.notify, toInterface(val)) + return nil + } + + return s +} + +func toInterface(val interface{}) interface{} { + switch v := val.(type) { + case []vm.StackItem: + arr := make([]interface{}, len(v)) + for i, item := range v { + arr[i] = toInterface(item) + } + return arr + case vm.StackItem: + return toInterface(v.Value()) + default: + return v + } +} + +func getID(name string) uint32 { + return vm.InteropNameToID([]byte(name)) +} + +func (s *storagePlugin) getInterop(id uint32) *vm.InteropFuncPrice { + f := s.interops[id] + if f != nil { + return &vm.InteropFuncPrice{Func: f, Price: 1} + } + + switch id { + case getID("Neo.Runtime.Serialize"): + case getID("Neo.Runtime.Deserialize"): + default: + panic("unexpected interop") + } + + return nil +} + +func mustPKey(pub []byte) *keys.PublicKey { + var pk keys.PublicKey + if err := pk.DecodeBytes(pub); err != nil { + panic(err) + } + return &pk +} + +func (s *storagePlugin) setCGASBalance(pub []byte, amount int64) { + pk := mustPKey(pub) + from := string(pk.GetScriptHash().BytesBE()) + s.cgas[from] = util.Fixed8FromInt64(amount) +} + +func (s *storagePlugin) CGASInvoke(v *vm.VM) error { + op := string(v.Estack().Pop().Bytes()) + args := v.Estack().Pop().Array() + + var result bool + + switch op { + case "transfer": + from := args[0].Value().([]byte) + to := args[1].Value().([]byte) + if len(from) != 20 || len(to) != 20 { + panic("invalid arguments") + } + + var amount util.Fixed8 + val := args[2].Value() + switch v := val.(type) { + case *big.Int: + amount = util.Fixed8(v.Int64()) + case []byte: + amount = util.Fixed8(emit.BytesToInt(v).Int64()) + default: + panic("invalid amount") + } + + if s.cgas[string(from)] >= amount { + s.cgas[string(from)] -= amount + s.cgas[string(to)] += amount + result = true + } + + default: + panic("invalid operation") + } + + v.Estack().PushVal(result) + + return nil +} + +func (s *storagePlugin) getScript(u util.Uint160) ([]byte, bool) { + var realHash util.Uint160 + copy(realHash[:], tokenHash[:]) + if u.Equals(realHash) { + buf := io.NewBufBinWriter() + emit.Syscall(buf.BinWriter, cgasSyscall) + return buf.Bytes(), false + } + panic("wrong script hash") +} + +func (s *storagePlugin) GetTrigger(v *vm.VM) error { + // todo: remove byte casting when neo-go issue will be resolved + // https: //github.com/nspcc-dev/neo-go/issues/776 + v.Estack().PushVal(byte(trigger.Application)) + return nil +} + +func (s *storagePlugin) CheckWitness(v *vm.VM) error { + v.Estack().PushVal(true) + return nil +} + +func (s *storagePlugin) GetExecutingScriptHash(v *vm.VM) error { + var h util.Uint160 + copy(h[:], contractHash[:]) + v.Estack().PushVal(h.BytesBE()) + return nil +} + +func (s *storagePlugin) logStorage(op string, key, value []byte) { + s.storageOps = append(s.storageOps, kv{ + Operation: op, + Key: key, + Value: value, + }) +} + +func (s *storagePlugin) Delete(v *vm.VM) error { + v.Estack().Pop() + key := v.Estack().Pop().Bytes() + s.logStorage("Delete", key, s.mem[string(key)]) + delete(s.mem, string(key)) + return nil +} + +func (s *storagePlugin) Put(v *vm.VM) error { + v.Estack().Pop() + key := v.Estack().Pop().Bytes() + value := v.Estack().Pop().Bytes() + s.logStorage("Put", key, value) + s.mem[string(key)] = value + return nil +} + +func (s *storagePlugin) Get(v *vm.VM) error { + v.Estack().Pop() + item := v.Estack().Pop().Bytes() + if val, ok := s.mem[string(item)]; ok { + v.Estack().PushVal(val) + s.logStorage("Get", item, val) + return nil + } + v.Estack().PushVal([]byte{}) + s.logStorage("Get", item, nil) + return nil +} + +func (s *storagePlugin) GetContext(v *vm.VM) error { + // Pushing anything on the stack here will work. This is just to satisfy + // the compiler, thinking it has pushed the context ^^. + v.Estack().PushVal(10) + return nil +}