vyper | Pythonic Smart Contract Language for the EVM | Cryptocurrency library

 by   vyperlang Python Version: 0.4.0rc6 License: Non-SPDX

kandi X-RAY | vyper Summary

kandi X-RAY | vyper Summary

vyper is a Python library typically used in Blockchain, Cryptocurrency, Ethereum applications. vyper has no bugs, it has build file available and it has high support. However vyper has 1 vulnerabilities and it has a Non-SPDX License. You can install using 'pip install vyper' or download it from GitHub, PyPI.

Pythonic Smart Contract Language for the EVM

            kandi-support Support

              vyper has a highly active ecosystem.
              It has 4543 star(s) with 767 fork(s). There are 159 watchers for this library.
              There were 10 major release(s) in the last 6 months.
              There are 259 open issues and 1095 have been closed. On average issues are closed in 173 days. There are 56 open pull requests and 0 closed requests.
              It has a negative sentiment in the developer community.
              The latest version of vyper is 0.4.0rc6

            kandi-Quality Quality

              vyper has 0 bugs and 0 code smells.

            kandi-Security Security

              vyper has 1 vulnerability issues reported (0 critical, 1 high, 0 medium, 0 low).
              vyper code analysis shows 0 unresolved vulnerabilities.
              There are 0 security hotspots that need review.

            kandi-License License

              vyper has a Non-SPDX License.
              Non-SPDX licenses can be open source with a non SPDX compliant license, or non open source licenses, and you need to review them closely before use.

            kandi-Reuse Reuse

              vyper releases are available to install and integrate.
              Deployable package is available in PyPI.
              Build file is available. You can build the component from source.
              Installation instructions, examples and code snippets are available.
              vyper saves you 19042 person hours of effort in developing the same functionality from scratch.
              It has 39722 lines of code, 2111 functions and 353 files.
              It has high code complexity. Code complexity directly impacts maintainability of the code.

            Top functions reviewed by kandi - BETA

            kandi has reviewed vyper and discovered the below as its top functions. This is intended to give you an instant insight into vyper implemented functionality, and help decide if they suit your requirements.
            • Create a contract function from a functionDef node
            • Get global namespace
            • Return the value of a field
            • Check if a node is kwargable
            • Check for loops
            • Return the ancestor of this node
            • Returns a copy of the exception with the given annotations
            • Checks if target_node is a valid iterator
            • Construct a global context from a module
            • Parse a Compare operator
            • Look up the IR for a self - call
            • Builds an IR code block
            • Visit a variable declaration
            • Build an IR expression
            • Fetches the call return definition
            • Build an IR instruction
            • Create an event from an EventDef node
            • Build an IR node
            • Build the IR code for concatenation
            • Builds an IR expression
            • Safe multiplication
            • Generate IR nodes for the given module
            • Build IR node
            • Parse an attribute
            • Build IR code
            • Parse command line arguments
            Get all kandi verified functions for this library.

            vyper Key Features

            No Key Features are available at this moment for vyper.

            vyper Examples and Code Snippets

            Universum blockhain contract / transaction scripts
            Rubydot img1Lines of Code : 128dot img1no licencesLicense : No License
            copy iconCopy
            # Gav Token Contract
            TOTAL_TOKENS = 100_000_000_000
            ## Endows creator of contract with 1m GAV.
            def setup
              @balances = Mapping.of( Address => Money )
              @balances[msg.sender] = TOTAL_TOKENS
            ## Send $((valueInmGAV   
            Simple Vyper ERC 20 Token Template , SmartContractCode.vy
            Pythondot img2Lines of Code : 85dot img2License : Permissive (MIT)
            copy iconCopy
            # Solidity-Compatible EIP20/ERC20 Token
            # Implements https://github.com/ethereum/EIPs/blob/master/EIPS/eip-20-token-standard.md
            # The use of the uint256 datatype as in this token is not
            # recommended, as it can pose security risks.
            # This token is  
            vyper-token-mix,Basic Use
            Pythondot img3Lines of Code : 19dot img3License : Permissive (MIT)
            copy iconCopy
            brownie console
            >>> token = Token.deploy("Test Token", "TST", 18, 1e21, {'from': accounts[0]})
            Transaction sent: 0x4a61edfaaa8ba55573603abd35403cf41291eca443c983f85de06e0b119da377
              Gas price: 0.0 gwei   Gas limit: 12000000
            PIP failed to build package cytoolz
            Pythondot img4Lines of Code : 4dot img4License : Strong Copyleft (CC BY-SA 4.0)
            copy iconCopy
            python -m pip install --user cython
            python -m pip install --user cytoolz
            python -m pip install --user eth-brownie

            Community Discussions


            PIP failed to build package cytoolz
            Asked 2022-Mar-26 at 18:26

            I'm trying to install eth-brownie using 'pipx install eth-brownie' but I get an error saying



            Answered 2022-Jan-02 at 09:59

            I used pip install eth-brownie and it worked fine, I didnt need to downgrade. Im new to this maybe I could be wrong but it worked fine with me.

            Source https://stackoverflow.com/questions/69875694


            Eth-Brownie Installation error: Tried all 3 methods [linux]
            Asked 2021-Dec-15 at 17:30

            I tried installing brownie via pipx, pip and the github repo , but each time I get this error on running brownie:



            Answered 2021-Dec-15 at 17:30

            I finally managed to solve this. I figured out that the error was due to vyper, as vyper --version also gave a similar error. So, I went to the last exception raised:

            Source https://stackoverflow.com/questions/70331345


            Do I need to use approve method in ERC721?
            Asked 2021-Nov-17 at 23:26

            I am practicing the smart contract and NFT looks interested to me.
            ERC721 written in Vyper

            What is the mechanic of approve in it?
            What is isApprovedForAll does?

            IMO. I don't need to use approve method. I just use transferFrom() is enough.
            Correct me if I am wrong



            Answered 2021-Nov-17 at 23:26

            The approval mechanism is described in more depth in the ERC-721 standard.

            What is the mechanic of approve in it?

            A token owner can approve another address (an operator) to spend a specific token using the approve() function, as well as all of the owner's tokens using setApprovalForAll().

            What is isApprovedForAll does?

            It's a getter function returning bool value whether an operator address can spend all of the owner tokens (i.e. they have been approved using the setApprovalForAll() function) - or not.

            I don't need to use approve method. I just use transferFrom() is enough.

            Correct if you're only spending your own tokens.

            If you want another address to spend your tokens, or if you want to spend tokens belonging to another owner (possibly one of your other addresses), you'll need to use the approval mechanism.

            Source https://stackoverflow.com/questions/70001835


            Scroll of "overflow-y" and Dropdown bar doesn't work correctly
            Asked 2021-Aug-01 at 11:29

            My code has two navigation bars. One in vertical and other in horizontal format.

            The first issue:

            I set the vertical bar such that it's scroll is active by this CSS code:



            Answered 2021-Aug-01 at 11:29

            I did refactor your code, for improve it. And fixed issues you wanted to solve.

            Source https://stackoverflow.com/questions/68608731


            How to test payable/external method with waffle and ethers.js
            Asked 2021-Apr-16 at 08:01

            Here is the smart contract, written in vyper, to be tested



            Answered 2021-Apr-16 at 08:01

            You can use the overrides parameter. It's used after all contract function arguments.

            In your case, the contract function has 0 arguments so the overrides is on position 1.

            Source https://stackoverflow.com/questions/67121007


            StateAccessViolation: Value must be a literal - Vyper Ethereum smart contract
            Asked 2021-Mar-14 at 15:03
            Version Information
            • vyper Version (output of vyper --version): 0.2.8+commit.069936f
            • OS: osx
            • Python Version (output of python --version): Python 2.7.16
            • Environment (output of pip freeze):


            Answered 2021-Mar-11 at 07:07

            Look at the description of range-function, there just one way to pass a variable to it:

            Source https://stackoverflow.com/questions/66538392


            A security issue with require(send()) in Solidity
            Asked 2021-Feb-08 at 11:41

            I'm working on a uni project based on blockchain, and I have to audit our system, check known attacks, ect. This the the document that I check, principaly, since i start to work on smart contracts issues first : Known-attack ethereum smart contract

            I have trouble understanding the example used in the "Dos With (unexpected) revert attack" part. I share the code :



            Answered 2021-Feb-08 at 11:40

            If send() target address is a smart contract it will execute the fallback function.

            If the currentLeader points to a smart contract that has a fallback function that has been intentionally made to revert on failed send, the bid() won't work for any participants until currentLeader has been changed.

            More information here.

            This is not a "DoS" attack but simply gotcha in Solidity programming.

            Source https://stackoverflow.com/questions/66099356

            Community Discussions, Code Snippets contain sources that include Stack Exchange Network


            No vulnerabilities reported

            Install vyper

            See Installing Vyper to install vyper. See Tools and Resources for an additional list of framework and tools with vyper support. See Documentation for the documentation and overall design goals of the Vyper language. See Vyper.fun for learning Vyper by building a Pokémon game.
            See the Vyper documentation for build instructions.


            See Issues tab, and feel free to submit your own issuesAdd PRs if you discover a solution to an existing issueFor further discussions and questions, post in Discussions or talk to us on DiscordFor more information, see Contributing
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          • PyPI

            pip install vyper

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          • CLI

            gh repo clone vyperlang/vyper

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