Remix

• Rej's opinion: fastest way to develop smart contract
• Test:
  • not good for truffle framework (cause lots of files!!)
• Capability
  • code smart contract in a browser
  • deploy to live network
  • NO account management
  • Testing options
    • Test in simulator
      • javascript VM for Solidity: in-memory Ethereum simulator, no mining, instant result
    • Can connect to local node
      • Install local Geth and connect browser (Run->Environment->Web3 provider)
    • Can work with MetaMask
      • Run->Environment->Injected Web3 (is the MetaMask)
  • some options do not require full Ethereum node so can be lightweight (CPU, bandwidth)
• Deploy contract, execution of contract
  • Compile -> [Contract name] -> Details : bytecode, ABI (interface) etc.
• Remix Local
  • code highlight, auto compile and more
  • however new file can only be created from outside (for now)
    • touch new_file
    • at remix, disconnect / reconnect remixd
  • with Remixd, work with local files
  • install best practice (as of JAN 2018)
    • from github clone and follow installation instruction: not for release, not recommended
    • follow github instruction for offline usage:
      1. goto https://github.com/ethereum/browser-solidity
      2. switch to Branch: gh-pages
      3. download "remix-d50dcc4.zip"
      4. unzip, open index.html and ready to use (without remixd)
      5. to connect to local dir, install & run remixd -
         1. npm install -g remixd
         2. remixd -S /dir/dir/dir/

Exercise notes

• Deployed CalculatorV2: 0x87083fc596440007a845ddc14cf68cb136cf4f1a