Building Smart Contracts with Remix
This workshop was created in 2018 (if something is broken, please shoot me a message over Gitter)
Part I
What will we build?
Voting DApp based on 2 contracts
First install Metamask
chrome.google.com/webstore
Login to Metamask
Ropsten test network
Get test ethers
Metamask faucet
Open Remix
File explorer
Editor
Terminal
Right panel
Set environment
Run tab: Environment = Injected web3 (Ropsten)
Load files to Remix
remix.loadgist('add9...')
remix.loadgist('add9633c2b0101f6fda0aadcfe350f60')
See new folder
gist/...
Open file
gist/AwardToken.sol
Compile the contract
Compile tab: Start to compile button
See compiled contracts
AwardToken + all its imported dependencies
Deploy the contract
Run tab: Deploy button
Confirm the transaction
Submit button
Check if tx is mined
Terminal logs in Remix
Part II
Open deployed contract
Run tab
See autogenerated UI
Interactive UI for AwardToken.sol contract
Start a new Ballot
startRound transaction (payable!)
Confirm the transaction
Submit button
Check if tx is mined
Terminal logs in Remix
Expand tx log
Terminal logs in Remix
startRound function
Editor
Get ballot's address
Execute currBallot call
Copy ballot's address
currBallot output
Switch to Ballot
Run tab: dropdown
Access Ballot contract
Paste address + click At Address
See autogenerated UI
Interactive UI for Ballot.sol contract
Part III
Expand addPoposal
Run tab/Deployed contract/Ballot
Copy your address
Run tab: Account
Type the proposal
Run tab/Deployed contracts/Ballot
Paste your address
Run tab/Deployed contract/Ballot
Execute addProposal
transact button
Confirm the transaction
Submit button
Check if tx succeeded
Terminal logs in Remix
Execute getProposals
getProposals call
See Proposals Addresses
Terminal logs in Remix
Vote for one Proposal
Paste Proposal Address you want to vote for
Execute vote transaction
vote button
Confirm the transaction
Submit button
Check if tx succeeded
Terminal logs in Remix
Copy Address
run tab: AwardToken
Let's connect it to frontend
Paste your AwardToken contract address
From Remix
How users will use it
Create new Proposal
Confirm it
Check in Remix
run tab: Ballot: getProposals
Want to host the frontend yourself
https://github.com/ninabreznik/voting-ethereum-contract
Need help?
@0mkara @iurimatias @LianaHus @ninabreznik @ryestew @yann300 @serapath