This code is to create a proveable random smart contract lottery.
- Users can enter by paying for a ticket
- The ticket fees are going to go to the winner during the draw
- After X period of time, the lottery will automatically draw a winner
- This will be done programatically
- Using Chainlink VRF and Chainlink Automation
- Chainlink VRF -> Randomness
- Chainlink Automation -> Time based trigger
Contract elements should be laid out in the following order:
- Pragma statements
- Import statements
- Events
- Errors
- Interfaces
- Libraries
- Contracts
Inside each contract, library or interface, use the following order:
- Type declarations
- State variables
- Events
- Errors
- Modifiers
- Functions
Order of functions
- constructor
- receive function (if exists)
- fallback function (if exists)
- external
- public
- internal
- private
- Within a grouping, place the view and pure functions last.
The modifier order for a function should be:
- Visibility
- Mutability
- Virtual
- Override
- Custom modifiers
- Write some deploy scripts
- Write some Tests
- Work on local chain
- Work on Forked testnet
- Work on Forked mainnet
Foundry is a blazing fast, portable and modular toolkit for Ethereum application development written in Rust.
Foundry consists of:
- Forge: Ethereum testing framework (like Truffle, Hardhat and DappTools).
- Cast: Swiss army knife for interacting with EVM smart contracts, sending transactions and getting chain data.
- Anvil: Local Ethereum node, akin to Ganache, Hardhat Network.
- Chisel: Fast, utilitarian, and verbose solidity REPL.
$ forge build$ forge test$ forge fmt$ forge snapshot$ anvil$ forge script script/Counter.s.sol:CounterScript --rpc-url <your_rpc_url> --private-key <your_private_key>$ cast <subcommand>$ forge --help
$ anvil --help
$ cast --help