bton/README.md

TON Starter Template - Contracts

Starter template for a new TON project - FunC contracts, JS tests, compilation and deployment scripts

Overview

This project is part of a set of 3 typical repositories needed for a blockchain dapp running on TON blockchain:

• Smart contracts in FunC that are deployed on-chain (this repo)
• Web frontend for interacting with the dapp from a web browser
• Telegram bot for interacting with the dapp from inside Telegram messenger

What does this repo contain?

• contracts/*.fc - Smart contracts for TON blockchain written in FunC language
• build/build.ts - Build script to compile the FunC code to Fift
• build/deploy.ts - Deploy script to deploy the compiled code to TON mainnet
• test/*.spec.ts - Test suite for the contracts running on Mocha test runner

There is no one official way to develop smart contracts for TON. Every developer has their own best practices. This setup is definitely opinionated and some developers may not appreciate the choices made. Nevertheless, we stand by every choice made here and believe that this is the optimal setup to develop fully tested contracts in the most seamless way possible.

Some of the opinionated choices made here include:

• Strong belief in tests - contracts often manage money - they must be developed under high scrutiny
• Clear and documented code to help users audit the contracts sources and understand what they do
• Reliance on modern TypeScript to develop clean and typed scripts and tests in a modern framework
• Reliance on TypeScript for deployment instead of working with fift CLI tools - it's simply easier
• Tests are executed in JavaScript with TVM in web-assembly - a great balance of speed and convenience
• Following of the TON contract best practices appearing in the official docs

Dependencies and requirements

To setup your local machine for development, please make sure you have the following:

• A modern version of Node.js
  • Installation instructions can be found here
  • Run in terminal node -v to verify your installation, the project was tested on v17.3.0
• The func CLI tool (FunC compiler)
  • Installation instructions can be found here
  • Run in terminal func -V to verify your installation
• The fift CLI tool
  • Installation instructions can be found here
  • Don't forget to set the FIFTPATH env variable as part of the installation above
  • Run in terminal fift -V and fift to verify your installation
• A decent IDE with FunC and TypeScript support
  • We recommend using Visual Studio Code with the FunC plugin installed

Once your local machine is ready, install the project:

• Git clone the repo locally and rename the directory to your own project name
• In the root repo dir, run in terminal npm install

or.. work online instead

Alternatively, you can ignore the above requirements and develop right inside a web browser with an online IDE and zero setup. Simply open this repo inside Glitch without installing anything:

• Create your new Glitch workspace by opening this link in your browser
• Wait about 60 seconds until installation completes
  (click the "LOGS" button on the bottom of the IDE to see progress)
• Edit your contract files and tests in the online IDE
• To run terminal commands like npm run build click the "TERMINAL" button on the bottom of the online IDE
• Working online is slow! run on a local machine if you want a much faster experience

Development instructions

• Write code

  • FunC contracts are located in contracts/*.fc
    • Standalone root contracts are located in contracts/*.fc
    • Shared imports (when breaking code to multiple files) are in contracts/imports/*.fc
    • Contract-specific imports that aren't shared are in contracts/imports/mycontract/*.fc
  • Each contract may have optional but recommended auxiliary files:
    • TL-B file defining the encoding of its data and message ops in contracts/mycontract.tld
    • TypeScript file that implements the encoding of its data and message ops in contracts/mycontract.ts
  • Tests in TypeScript are located in test/*.spec.ts

• Build

  • In the root repo dir, run in terminal npm run build
  • Compilation errors will appear on screen
  • Resulting build artifacts include:
    • mycontract.merged.fc - merged and flattened FunC source code with all imports
    • mycontract.fif - Fift file result of compilation (not very useful by itself)
    • mycontract.cell - the binary code cell of the compiled contract (for deployment)

• Test

  • In the root repo dir, run in terminal npm run test
  • Don't forget to build (or rebuild) before running tests
  • Tests are running inside Node.js by running TVM in web-assembly using ton-contract-executor

• Deploy

  • Make sure all contracts are built and your setup is ready to deploy:
    • Each contract to deploy should have a script build/mycontract.deploy.ts to return its init data cell
    • The deployment wallet is configured in .env (created automatically if not exists), with contents:
      DEPLOYER_MNEMONIC="mad nation chief flavor ..."
  • To deploy to mainnet (production), run in terminal npm run deploy
    • To deploy to testnet instead (where TON coins are free), run npm run deploy:testnet
    • Follow the on-screen instructions of the deploy script