DSNP Contracts

The official DSNP interface and implementations.

Overview

Installation

$ npm install @unfinishedlabs/contracts

JavaScript ABI Usage

const announcer = require("@unfinishedlabs/contracts/abi/Announcer.json");
const annoucerABI = announcer.abi;

TypeScript ABI Usage

// Requires "resolveJsonModule": true in [tsconfig](https://www.typescriptlang.org/tsconfig#resolveJsonModule)
import { abi as announcerABI } from "@unfinishedlabs/contracts/abi/Announcer.json";

TypeScript Contract Types

To maintain types, it is suggested to use TypeChain.

1. Follow the install directions and add the correct package for your toolset.
2. Add a postinstall or other step to run typechain:

• "postinstall": "typechain --target=(ethers-v5|web3-v1|other...) node_modules/@unfinishedlabs/contracts/**/*.json --outDir ./types/typechain"
• "build:web3types": "typechain --target=web3-v1 node_modules/@unfinishedlabs/contracts/**/*.json --outDir ./types/typechain"

3. Make sure your --outDir is in tsconfig typeRoots.
4. Use the types:

// web3 example
import web3 from "web3";
import { Announcer } from "./types/typechain/Announcer";
import { abi as announcerABI } from "@unfinishedlabs/contracts/abi/Announcer.json";

const getAnnouncerContract = (contractAddress: string) => {
  // web3 requires the type cast
  return new web3.eth.Contract(announcerABI, contractAddress) as Announcer;
}

// ethersjsv5 example
import { Provider } from "@ethersproject/providers";
import { Announcer } from "./types/typechain/Announcer";

const getAnnouncerContract = (contractAddress: string, provider: Provider) => {
  // TypeChain for Ethers provides factories
  return Announcer__factory.connect(contractAddress, provider);
}

Contract Usage

Once installed, you can use the contracts in the library by importing them:

pragma solidity ^0.8.0;

import "@unfinishedlabs/contracts/IAnnounce.sol";

contract MyAnnouncer is IAnnounce {
    // ...
}

Development

We are using hardhat to compile and deploy the contracts

Key Commands and Tasks

Basic Command List:

• npm install
• npm run clean - clears the cache and deletes all artifacts
• npm run compile - compiles the entire project, building all artifacts
• npm run console - opens a hardhat console
• npm run test - runs mocha tests
• npm run lint - to run the linter
• npm run format - to trigger formatting
• npm run deploy:testnet - deploys our deploy.ts script to our POA testnet defined in the hardhat.config.ts

Environment Variables

1. create a .env file and set values for all variables in .env.sample

Accounts

Deployments

Ports

Development

• This repo uses Hardhat + ethers for interfacing with Ethereum,
• Waffle for testing,
• And Truffle or truffle-style for contract migration.