truffle | Crafted with the finest cacaos | Blockchain library

 by   trufflesuite TypeScript Version: 5.11.5 License: MIT

kandi X-RAY | truffle Summary

kandi X-RAY | truffle Summary

truffle is a TypeScript library typically used in Financial Services, Fintech, Blockchain, Ethereum applications. truffle has no bugs, it has no vulnerabilities, it has a Permissive License and it has medium support. You can download it from GitHub.

Truffle is a development environment, testing framework and asset pipeline for Ethereum, aiming to make life as an Ethereum developer easier. With Truffle, you get:.

            kandi-support Support

              truffle has a medium active ecosystem.
              It has 13947 star(s) with 2353 fork(s). There are 338 watchers for this library.
              There were 10 major release(s) in the last 12 months.
              There are 515 open issues and 2382 have been closed. On average issues are closed in 102 days. There are 16 open pull requests and 0 closed requests.
              It has a neutral sentiment in the developer community.
              The latest version of truffle is 5.11.5

            kandi-Quality Quality

              truffle has 0 bugs and 2 code smells.

            kandi-Security Security

              truffle has no vulnerabilities reported, and its dependent libraries have no vulnerabilities reported.
              truffle code analysis shows 0 unresolved vulnerabilities.
              There are 0 security hotspots that need review.

            kandi-License License

              truffle is licensed under the MIT License. This license is Permissive.
              Permissive licenses have the least restrictions, and you can use them in most projects.

            kandi-Reuse Reuse

              truffle releases are available to install and integrate.
              Installation instructions, examples and code snippets are available.
              It has 37 lines of code, 2 functions and 940 files.
              It has low code complexity. Code complexity directly impacts maintainability of the code.

            Top functions reviewed by kandi - BETA

            kandi has reviewed truffle and discovered the below as its top functions. This is intended to give you an instant insight into truffle implemented functionality, and help decide if they suit your requirements.
            • Create the step selector for a step .
            • Set transaction log actions
            • Update code storage .
            • Contract instance
            • Maps the action and updates the new path to the new one .
            • Compiles JSON files into an object that can be written to JSON .
            • recursively process all build contracts
            • Runs provided sources
            • Creates the step selector for the step selector .
            • Process a target
            Get all kandi verified functions for this library.

            truffle Key Features

            No Key Features are available at this moment for truffle.

            truffle Examples and Code Snippets

            ghostmarket-sdk-js,Getting started,EVM quickstart
            TypeScriptdot img1Lines of Code : 47dot img1License : Permissive (MIT)
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            import Web3 from 'web3'
            import { GhostMarketSDK, Chain, TESTNET_API_URL, MAINNET_API_URL } from 'ghostmarket-sdk-js';
            // if using EVM private key or mnemonic hdwallet-provider is required
            // import HDWalletProvider from '@truffle/hdwallet-provider'
            Getting Error on installing Truffle on windows 10 using npm install truffle -g
            JavaScriptdot img2Lines of Code : 44dot img2License : Strong Copyleft (CC BY-SA 4.0)
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            npm install -g truffle@5.4.29
            PS C:\Windows\system32> npm list -g
            +-- ganache-cli@6.12.2
            +-- node-gyp@8.2.0
            +-- npm@8.0.0
            +-- **truffle@5.4.29**
            `-- yarn@1.22.17
            PS C:\Windows\system32> truffle
            Truffle failing to install on a Mac M1
            JavaScriptdot img3Lines of Code : 6dot img3License : Strong Copyleft (CC BY-SA 4.0)
            copy iconCopy
            sudo rm -rf /Library/Developer/CommandLineTools
            sudo Xcode-select --install 
            sudo npm install -g truffle
            Unable to retrieve the Ethereum balance of MetaMask account
            JavaScriptdot img4Lines of Code : 76dot img4License : Strong Copyleft (CC BY-SA 4.0)
            copy iconCopy
            const showAccount = document.querySelector('.showAccount');
            const showBalance = document.querySelector('.showBalance');
            async function getAccount() {
                const accounts = await ethereum.request({ method: 'et
            truffle compile contracts specifying incorrect solidity version
            JavaScriptdot img5Lines of Code : 29dot img5License : Strong Copyleft (CC BY-SA 4.0)
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                module.exports = {
              // See 
              // for more about customizing your Truffle configuration!
              networks: {
                development: {
                  host: "",
                  port: 7545,
                  network_id: "*" // Match any network id
                develop: {
            Installing node package globally without internet on server error: No such file or directory
            JavaScriptdot img6Lines of Code : 37dot img6License : Strong Copyleft (CC BY-SA 4.0)
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            npm install --save-peer pm2 truffle
            $ npx truffle -v
            npx truffle -v   
            Truffle v5.3.0 - a development framework for Ethereum
            Usage: truffle  [options]
              build     Execute build pipeline (if configuratio
            How to configure truffle to connect to RSK Testnet public node?
            JavaScriptdot img7Lines of Code : 23dot img7License : Strong Copyleft (CC BY-SA 4.0)
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                testnet: {
                  provider: () => new HDWalletProvider({
                    mnemonic: {
                      phrase: testnetSeedPhrase,
                    providerOrUrl: '',
                    // Higher polling interval to 
            Some Truffle Commands do nothing
            JavaScriptdot img8Lines of Code : 2dot img8License : Strong Copyleft (CC BY-SA 4.0)
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            sudo truffle migrate
            Can't uninstall and reinstall Truffle?
            JavaScriptdot img9Lines of Code : 4dot img9License : Strong Copyleft (CC BY-SA 4.0)
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            which truffle
            rm -f /usr/local/bin/truffle
            Solidity error: Expected identifier, got 'LParen'
            JavaScriptdot img10Lines of Code : 12dot img10License : Strong Copyleft (CC BY-SA 4.0)
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            Truffle v4.1.14 (core: 4.1.14)
            Solidity v0.4.24 (solc-js)
            solc, the solidity compiler commandline interface
            Version: 0.4.19+commit.e67f0147.Darwin.appleclang
            brew update
            brew upgrade
            brew t

            Community Discussions


            contract function invoked by web3py without error but have no effect (ganache local network)
            Asked 2022-Apr-08 at 08:47

            compiled code by py-solc-x, then deployed it to the ganache local network using web3py api. first, call a get_balance function and it return as expected. second, call the transfer function and it return without error, but the balance have not changed when I call get_balance later. try to call transfer by sending a raw transaction but it still no effect...

            metacoin.sol (provided by truffle doc)



            Answered 2022-Apr-08 at 08:47

            Check that the transaction went through



            Contract "Coin" should be marked as abstract
            Asked 2022-Apr-04 at 20:59

            i want to create a token on ERC-20 network.

            i want to inheritance from interface in my contract .

            when i inheritance form interface it show me this error :

            Contract "CpayCoin" should be marked as abstract.

            solc version in truffle :



            Answered 2021-Dec-04 at 13:22

            Solidity currently (v0.8) doesn't have a way to tell that a class (a contract) implements an interface. Instead, the is keyword is used to mark an inheritance, as "derives from".

            So the CpayCoin is IERC20 expression marks the CpayCoin as a child and IERC20 as a parent - not as an interface.

            The IERC20 (parent) defines few functions (e.g. decimals() and transfer()) that the CpayCoin (child) doesn't implement, which makes the CpayCoin an abstract class.


            Implement in CpayCoin all functions defined in the IERC20 interface to not make it an abstract class, and to make it follow the ERC-20 standard. Then you're free to remove the inheritance as it becomes redundant.

            Or just remove the inheritance to not have any unimplemented function definitions (but then the contract won't follow the ERC-20 standard).

            Mind that in your current code, the _transfer() internal function is unreachable. I'd recommend to implement a transfer() external function that invokes this internal _transfer().



            Getting Error on installing Truffle on windows 10 using npm install truffle -g
            Asked 2022-Mar-23 at 14:45

            When i tried to install truffle i got these errors :-

            I have installed Node.js earlier and also i have pip installed.



            Answered 2022-Jan-26 at 17:42

            Here are some references that might help:

            Try installing Truffle via PowerShell in Admin mode (very important that you're in Admin mode)

            You'll need to allow scripts to run as an Admin in PowerShell. To do this, here are some references in the threads in Stack Overflow:

            Enable Execution of PowerShell Scripts

            PowerShell Scripts

            Cannot Install Truffle

            I ran the command Set-ExecutionPolicy -Scope CurrentUser -ExecutionPolicy Bypass -Force in PowerShell to get this to work, but please reference the threads above before doing this.



            How do I interact with Uniswap V2 in a Truffle test suite?
            Asked 2022-Mar-12 at 21:28

            I am looking for a way to create an automated test suite with Truffle that can test my smart contract's interactions with Uniswap V2. The Uniswap docs briefly mention testing with Truffle but do not provide any examples. I am looking to test it using a mainnet fork with ganache.

            I'm guessing it's a similar process to the accepted answer for this question, but I'm specifically looking for a way to do it using Truffle and web3.js.

            As an example, if I were testing the following contract:



            Answered 2022-Feb-12 at 12:48

            If you use Uniswap platform to swap a token, you are going to have 2 steps. You are going to approve the token, in this step metamask will pop-up and you are going to confirm it. Then Uniswap will do the actual swap, it takes the tokens out of your wallet and does the exchange for you.

            This is the swapExactETHForTokens function



            Truffle migrate --network bsc error: header not found
            Asked 2022-Mar-02 at 20:44

            When trying to run truffle migrate --network bsc, truffle usually (not always) manages to deploy the migrations contract, then fails with an error: header not found.



            Answered 2022-Mar-02 at 20:44

            I had the same problem today. Fixed it by using the Websocket endpoint wss:// from the smart chain docs



            Error while installing truffle using "npm i truffle -g"
            Asked 2022-Feb-24 at 02:31

            while installing truffle on my desktop.An anonymes error ...

            first its showing the error related to python which is strange but then i install python now this error `



            Answered 2022-Jan-31 at 04:58

            You have to install Visual Studio Community 2022 as well as Visual Studio Code. And when installing Visual Studio Community, you have to install desktop development with C++ with some optional packages.



            Deploying Uniswap v2 / Sushiswap or similar in Brownie, Hardhat or Truffle test suite
            Asked 2022-Feb-20 at 10:59

            I am writing an automated test suite that needs to test functions against Uniswap v2 style automated market marker: do swaps and use different order routing. Thus, routers need to be deployed.

            Are there any existing examples of how to deploy a testable Uniswap v2 style exchange in Brownie? Because Brownie is a minority of smart contract developers, are there any examples for Truffle or Hardhat?

            I am also exploring the option of using a mainnet fork, but I am not sure if this operation is too expensive (slow) to be used in unit testing.



            Answered 2022-Feb-10 at 14:30

            Using a local testnet allows you to control very precisely the state of the blockchain during your test. However, it will require you to deploy every contract you need manually.

            A fork of the mainnet will save you from having to deploy every contract already deployed on the mainnet. However you will sacrifice control over the environment and will require a connection to a node.

            I've deployed Uniswap 2V on a testnet a few times. To do it you will need the bytecode and ABI for the following contracts: UniswapV2Factory, UniswapV2Pair, UniswapV2Router02 (I suppose you want the second version of the router). The Uniswap docs explains very well how to download them from NPM. For the router to work properly you will also need to deploy a WETH contract. I suggest deploying the one from this github page.

            Before running this code, just make sure that your chain is running. For hardhat run the following command:



            Truffle installation error: "install latest visual studio version"
            Asked 2022-Feb-17 at 16:59

            enter image description hereI've installed latest version of visual studio with desktop development c++ workload but still they are asking for it when i try to install truffle. I entered command :npm install -g truffle and lot of messages appear after 2 to 3 minutes of some kind of installation process. they are asking for Latest version of Visual Studio with "Desktop development with c++ workload" whereas i just installed my Visual studio with the same requirements. node.js and ganache are already installed. Is there any other way to install truffle?



            Answered 2022-Feb-17 at 16:59

            If you are installing it using npm package manager. Downgrade your npm to 7.24.2 it worked for me I hope it will also work for you. Use the following command to downgrade npm



            R: dpois not returning correct probabilities?
            Asked 2022-Feb-09 at 00:03

            I am working with dataset of the number of truffles found in 288 search areas. I am planning to test the null hypothesis that the truffles are distributed randomly, thus I am using dpois() to to calculate the expected probability densities. There are 4 categories (0, 1, 2, or 3 truffles per plot). The expected probabilities will later be converted to expected proportions and incorporated into a chisq.test analysis.

            The problem is that the expected probabilities that I get with the following code don't make sense. They should sum to 1, but are much too small. I run the same exact code with another dataset and it produces normal values. What is going on here?



            Answered 2022-Feb-09 at 00:03

            Lambda should be the average frequency, but taking mean(trufflesTable) returns the average of the counts of frequencies. Use mean(trufflesFound) instead. The reason the second one looks "right" is because mean(extinctData) is relatively close to mean(extinctFreqTable). Note that the probabilities don't sum exactly to 1, because given the mean it is conceivable that we'd observe more than 4 truffles in a future search area.



            How can get json interface of the smart contract
            Asked 2022-Feb-01 at 11:29

            I export JSON interface from compile.js file but deploy.js file not work it shows error as



            Answered 2021-Sep-21 at 17:11

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


            No vulnerabilities reported

            Install truffle

            You can download it from GitHub.


            Please see the Official Truffle Documentation for guides, tips, and examples.
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