web3-poc

Table of Content

• Summary
• References
• Preconditions
• Getting Started

Summary

Proof of Concept (PoC) in regards to Web3 with smart contracts and a decentralized application (dApp)

NOTE In this proof of concept (PoC) we are only working with a local Hardhat node and not interacting with test or production networks.

References

• Hardhat Ethereum development environment
• Deploying your contracts
• OpenZeppelin

Preconditions

• Unix-like terminal (Ubuntu WSL on Windows OS)
• Ensure you have Node.js and npm installed
• Install npm dependencies by running:

cd hardhat
npm install
cd -
cd web3-sample-dapp
npm install
cd -

• Add MetaMask extension for signed transactions. Therefore

  1. Setup custom RPC network similar to:

  

  NOTE: The hardhat network id is per default 31337.

  2. Import private keys in hardhat local node console logs in MetaMask:
  3. Transfer ETH to Account 1 similar to:

  

Getting Started

Open one terminal and start the local Ethereum node by executing:

make launch-local-eth-node

In a second terminal compile and deploy the Greeter smart contract with:

make compile-and-deploy-greeter-smart-contract

Finally in the second terminal start the React dapp by running:

make start-react-app

Results should resemble the following:

NOTE: Consider clearing activity data if you experience errors as described in this link: