Demo Project for Online Stream #3 and #4 (#31 and #32) - Smart contract deployment into test blockchain

Demo project for online stream #3 and #4 of blockchain course (#31 and #32 of total streams) about using Truffle to compile and deploy smart contracts to Ganache - a testing in-memory blockchain. Stream #4 added ability to compile smart-contract and create Java wrappers with web3j library.

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Running the Demo

Follow the guides provided below to install Truffle with nodejs.

Then compile contracts using:

truffle compile

Then run develop blockchain ganache using:

truffle develop

Inside the truffle prompt run migrate command to deploy your smart contracts:

truffle(develop)> migrate

The output should be similar to the following:

Starting migrations...
======================
> Network name:    'develop'
> Network id:      5777
> Block gas limit: 6721975 (0x6691b7)


1_deploy_contracts.js
=====================

   Replacing 'FundraiserFactory'
   -----------------------------
   > transaction hash:    0x990b453dc625e42fe22ffc5be9a590cd17ff69de3534351ba8e4a5c0fcbcd6fd
   > Blocks: 0            Seconds: 0
   > contract address:    0x73270D0B84511cb30dEfAB0AB1AbbBCC91328D42
   > block number:        1
   > block timestamp:     1677408127
   > account:             0x4489287Eb3823d05a1DaF86bD61EF4899588aB99
   > balance:             99.995544085375
   > gas used:            1320271 (0x14254f)
   > gas price:           3.375 gwei
   > value sent:          0 ETH
   > total cost:          0.004455914625 ETH

   > Saving artifacts
   -------------------------------------
   > Total cost:      0.004455914625 ETH

Summary
=======
> Total deployments:   1
> Final cost:          0.004455914625 ETH

Take a note of the contract address of the FundraiserFactory contract. Use it to call method to create Fundraiser. For this use can use the online IDE Remix.

Compile Java Wrappers

To compine Java code wrappers for smart contracts and create jar with them use:

./gradlew jar

Reference Documentation

For further reference, please consider the following sections:

• Truffle Installation Guide
• Truffle Quickstart Guide
• Truffle Tutorial for Simple DApp
• Ganache
• Ethereum Official Documentation
• Web3j Quickstart