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Setting Up The Venom Smart Contract Development Environment

To improve your development experience, you may need some tools and utils to compile, deploy and test your Venom contracts. Locklift is a development environment like Hardhat or Truffle.

Let's install it​

npm install -g locklift
locklift --version
> 2.1.10

Initialize your first project​

locklift init --path sample-project
> New Locklift project initialized in sample-project
> Installing required dependencies...
> ...
> LockLift initialized in setup-env happy hacking!

This command initializes a new Locklift project, filled with samples:

├── locklift.config.ts
├── tsconfig.json
├── package.json
├── package-lock.json
│
├── contracts
│   └── Sample.tsol
├── scripts 
│   └── 1-deploy-sample.ts
└── test
    └── sample-test.ts

Configuration​

The configuration file is called locklift.config.ts. Here's the basic layout for Venom blockchain networks:

import { LockliftConfig } from "locklift";
import { FactorySource } from "./build/factorySource";

declare global {
  const locklift: import("locklift").Locklift<FactorySource>;
}

const LOCAL_NETWORK_ENDPOINT = "http://localhost/graphql";

const config: LockliftConfig = {
  compiler: {
    version: "0.62.0",
  },
  linker: {
    version: "0.15.48",
  },
  networks: {
    // Configuration of 'local' network can be left unchanged
    local: {
      connection: {
        group: "localnet",
        type: "graphql",
        data: {
          endpoints: [LOCAL_NETWORK_ENDPOINT],
          latencyDetectionInterval: 1000,
          local: true,
        },
      },
      // This giver is default local-node giverV2
      giver: {
        address: "0:ece57bcc6c530283becbbd8a3b24d3c5987cdddc3c8b7b33be6e4a6312490415",
        key: "172af540e43a524763dd53b26a066d472a97c4de37d5498170564510608250c3",
      },
      tracing: {
        endpoint: LOCAL_NETWORK_ENDPOINT,
      },
      keys: {
        // Use everdev to generate your phrase
        // !!! Never commit it in your repos !!!
        phrase: "action inject penalty envelope rabbit element slim tornado dinner pizza off blood",
        amount: 20,
      },
    },
  },
  mocha: {
    timeout: 2000000
  }
};

export default config;

Let's go through each parameter

compiler.version The version of the solidity compiler binary linker.version The version of the TVM-linker binary

networks Specifies which networks are available for deployment and testing networks.[NETWORK_NAME].keys.phrase If you leave this field value empty - a new random seed will be generated each time you're running locklift. Or specify it explicitly - fill the phrase field with a mnemonic phrase.

Run The Local Node​

info

You need to have a docker runtime to continue with this guide

If Locklift is like a Hardhat development environment tool, then local-node is Ganache-like a local blockchain that is designed for dapp debugging and testing.

To run local-node you need to follow a command

 docker run -d -e USER_AGREEMENT=yes --rm --name local-node -p80:80 tonlabs/local-node

The container exposes the specified 80 port with Nginx which proxies requests to /graphql to GraphQL API.

Check out GraphQL playground at http://localhost/graphql

That's all! You can run tests and start to develop your amazing projects

locklift test --network local --config ./locklift.config.ts

The next step in your learning is here

Troubleshooting​

If you are using macOS on Apple M1, follow these commands before starting tutorial
// Install Rosseta2
softwareupdate --install-rosetta

// Start a shell under Rosetta2
arch -x86_64 zsh

// If you already have installed nodejs,
// reinstall the x64 version of Node.js
nvm use system
nvm cache clear
nvm uninstall 16 # or the version you need, but not less than 14
nvm install 16   # or the version you need, but not less than 14
nvm use 16       # or the version you need, but not less than 14

All locklift commands must be performed from under the Rosetta2 shell