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.

https://book.getfoundry.sh/

$ forge build

• Simple

  $ forge test

• Verbose

  $ forge test -vvvv

  • The more v will be used (for a maximum of 4), the more verbosity output will be printed
• Run specific test

  forge test --match-test <regex>

  • Example

    forge test --match-test testPriceFeedVersionIsAccurate

• Run test on a forked chain

  forge test --fork-url <your_forked_chain_rpc_url>

  • Example

    forge test --fork-url $SEPOLIA_RPC_URL

• Run test with coverage

  forge coverage

$ forge fmt

$ forge snapshot

• Inspect the storage layout of a contract

  forge inspect <contract_name> storageLayout

  • Example

    forge inspect FundMe storageLayout

$ anvil

• Simple

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

• Build deploy transaction without sent it (test if the script goes well)

  forge script script/FundMe.s.sol:FundMeScript

• Deploy FundMe contract and the related Interactions:FundFundMe contract

  forge script script/FundMe.s.sol \
    --force \
    --broadcast \
    --rpc-url http://localhost:8545 \
    --private-key 0xac0974bec39a17e36ba4a6b4d238ff944bacb478cbed5efcae784d7bf4f2ff80
  forge script script/Interactions.s.sol:FundFundMe \
    --force \
    --broadcast \
    --rpc-url http://localhost:8545 \
    --private-key 0xac0974bec39a17e36ba4a6b4d238ff944bacb478cbed5efcae784d7bf4f2ff80

$ cast <subcommand>

• Get the contract's storage at specified slot

  cast storage <contract_address> <storage_slot_number>

• Get the function's selector

  cast sig "<function-signature>"

  • Example

    cast sig "getAddressToAmountFunded(address)" 

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

• Chainlink
  • Latest version

    forge install smartcontractkit/chainlink-brownie-contracts

  • Specific version

    forge install smartcontractkit/chainlink-brownie-contracts@<version>

    • Example

      forge install smartcontractkit/chainlink-brownie-contracts@1.1.1

• foundry-devops
  • A repo to get the most recent deployment from a given environment in foundry. This way, you can do scripting off previous deployments in solidity.

    forge install Cyfrin/foundry-devops