Blockchain Course 6 Exercises

To install, download or clone the repo, then move to the required exercise branch with either:

• Stop Loss git checkout ExerciseC6A
• Receive Transfer and Send Funds git checkout ExerciseC6B
• Smart Contract Upgradability git checkout ExerciseC6C
• Data from Oracles git checkout ExerciseC6D

and for each exercise run:

npm install
truffle compile

Develop

To run truffle tests its recommnded to use ganache-cli and truffle console like so:

ganache-cli
truffle console
test # Runs the tests in the console
test test/ExcerciseC6.... # Runs the specific test file in the console

Resources

• How does Ethereum work anyway?
• Truffle Framework
• Ganache Local Blockchain
• Solidity Language Reference
• Ethereum Blockchain Explorer
• Web3Js Reference* BIP39 Mnemonic Generator
• Remix Solidity IDE

Versions

This code was created with the following versions of tools:

• Truffle v5.0.1 (core: 5.0.1)
• Solidity v0.5.0 (solc-js)
• Node v8.9.4
• Ganache v1.2.3

Troubleshooting

• Ensure Ganache is running on port 8545
• Ensure Ganache mnemonic is identical to mnemonic in truffle.js
• Ensure you have at least the versions of the tools specified above
• Delete node_modules folder and run "npm install" to refresh dependencies
• If you get compiler errors, change the "pragma" line in all .sol files to match your version