Columbia ELENE6883 Final Project

1. Operate on top of ganache and Metamask i. Condfigure RPC on Metamask
   • Open Metamask and choose "Add Network"
   • Open Ganache and copy the RPC server
   • Configure the network with Name: {your choice}, RPC URL: {RPC server from Ganache}, Chain ID: 1337, Currency Symbol: ETH
   • Save the network configuration ii. Import ethereum account from ganache
   • Open Ganache and choose one {key symbol} from any address
   • Copy the {private key}
   • Open Metamask and choose {Import Account}
   • Paste the Private Key to create a new account
   • You will see the number of ETH the account holds on Metamask
2. Connect your Metamask account to the website

• Click the 3-dots button on the upper-right corner
• Choose "connect site"

3. Lottery

• truffle compile
• truffle migrate --reset
• truffle network
• Your will see addresses for each contract
  • Copy the address of LotLottery to $blockchain/build/lottery.js

4. Migrate to Huygens

• install HD Wallet Provider: npm install @truffle/hdwallet-provider
• Export your private key from AleWallet and change the privateKey in truffle-config.js into your own and
  • Click the 3-dots symbol on the upper right and click "export Private Key"
• Open Postman and choose "POST" operation, pasting http://18.182.45.18:8765 into the blank on the right
• Import account from Alewallet
  • Click the 3-dots symbol on the upper right and click "Export Key Store"
  • A json file will be downloaded, paste the content of the file to the json field in Postman
  • Add backward slash to each field then click "send"
• (Optional) Since our project has been deployed to huygens network, no need to do the migration again. However, you can deploy our project on huygens network by following steps.
  • Run "truffle migrate --network huygens --reset" on the project root directory
  • Run "truffle network" to get the contract address, including LotToken, LotTokenSale and Lottery
  • Modify the contract address in contract.js
    • Set coreAddress and tokenAddress_lot to LotToken contract address
    • Set tokenAddress to LotTokenSale contract address
    • Set lotteryAddress to Lottery contract address
• Make sure you have all the dependencies installed by running "npm install"

5. Play with our project

• cd into the "modified2" directory and run "npm run serve"
• Open the URL in your browser
• Start exploring The Lottery DApp
• (Optional) Make sure Metamask is disabled in your browser while Alewallet should be enabled

1. npm run dev shows error - failed to load SWC binary

• Delete the package-lock.json file and the node_modules directory in your project and then run npm install on your terminal

2. Use sendBlock instead of sendToBlock to do transaction on huygens network