Lottery 4D

This is a decentralized 4D lottery, where random 4 digit numbers will be picked using Chainlink's VRF. Players are able to submit numbers from 0 - 9999, and if the number matches the prize number, the player will receive a prize according to the prize pool. A countdown of 24 hours will be initiated to pick the prize numbers will when the first player submits a number.

Distribution of prize:

First Prize : 70% of total prize pool

Second Prize : 20% of total prize pool

Third Prize : 10% of total prize pool

Live Demo

Foundry

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.

Documentation

https://book.getfoundry.sh/

Usage

Build

$ forge build

Test

$ forge test

Format

$ forge fmt

Gas Snapshots

$ forge snapshot

Anvil

$ anvil

Deploy

$ forge script script/Counter.s.sol:CounterScript --rpc-url <your_rpc_url> --private-key <your_private_key>

Cast

$ cast <subcommand>

Help

$ forge --help
$ anvil --help
$ cast --help