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

NFT_COLLECTION

data:image/svg+xml;base64,PHN2ZyB4bWxucz0iaHR0cDovL3d3dy53My5vcmcvMjAwMC9zdmciIHdpZHRoPSIxMDAiIGhlaWdo dD0iMTAwIj4KICA8dGV4dCB4PSIwIiB5PSIxNSIgZmlsbD0iYmxhY2siPiBoaSEgeW91IGRlY29k ZWQgdGhpcyEgPC90ZXh0Pgo8L3N2Zz4=

data:image/svg+xml;base64, PHN2ZyB2aWV3Qm94PSIwIDAgMjAwIDIwMCIgd2lkdGg9IjQwMCIgIGhlaWdodD0iNDAwIiB4bWxu cz0iaHR0cDovL3d3dy53My5vcmcvMjAwMC9zdmciPgogIDxjaXJjbGUgY3g9IjEwMCIgY3k9IjEw MCIgZmlsbD0ieWVsbG93IiByPSI3OCIgc3Ryb2tlPSJibGFjayIgc3Ryb2tlLXdpZHRoPSIzIi8+ CiAgPGcgY2xhc3M9ImV5ZXMiPgogICAgPGNpcmNsZSBjeD0iNzAiIGN5PSI4MiIgcj0iMTIiLz4K ICAgIDxjaXJjbGUgY3g9IjEyNyIgY3k9IjgyIiByPSIxMiIvPgogIDwvZz4KICA8cGF0aCBkPSJt MTM2LjgxIDExNi41M2MuNjkgMjYuMTctNjQuMTEgNDItODEuNTItLjczIiBzdHlsZT0iZmlsbDpu b25lOyBzdHJva2U6IGJsYWNrOyBzdHJva2Utd2lkdGg6IDM7Ii8+Cjwvc3ZnPg==

When you use a command like base64 -i name.svg, you are turning a file into a long string of text. This is the "magic trick" that allows an image to live inside a smart contract.

sad emoji data:img/svg+xml;base64, PHN2ZyB3aWR0aD0iMTAyNHB4IiBoZWlnaHQ9IjEwMjRweCIgdmlld0JveD0iMCAwIDEwMjQgMTAy NCIgeG1sbnM9Imh0dHA6Ly93d3cudzMub3JnLzIwMDAvc3ZnIj4KICA8cGF0aCBmaWxsPSIjMzMz IiBkPSJNNTEyIDY0QzI2NC42IDY0IDY0IDI2NC42IDY0IDUxMnMyMDAuNiA0NDggNDQ4IDQ0OCA0 NDgtMjAwLjYgNDQ4LTQ0OFM3NTkuNCA2NCA1MTIgNjR6bTAgODIwYy0yMDUuNCAwLTM3Mi0xNjYu Ni0zNzItMzcyczE2Ni42LTM3MiAzNzItMzcyIDM3MiAxNjYuNiAzNzIgMzcyLTE2Ni42IDM3Mi0z NzIgMzcyeiIvPgogIDxwYXRoIGZpbGw9IiNFNkU2RTYiIGQ9Ik01MTIgMTQwYy0yMDUuNCAwLTM3 MiAxNjYuNi0zNzIgMzcyczE2Ni42IDM3MiAzNzIgMzcyIDM3Mi0xNjYuNiAzNzItMzcyLTE2Ni42 LTM3Mi0zNzItMzcyek0yODggNDIxYTQ4LjAxIDQ4LjAxIDAgMCAxIDk2IDAgNDguMDEgNDguMDEg MCAwIDEtOTYgMHptMzc2IDI3MmgtNDguMWMtNC4yIDAtNy44LTMuMi04LjEtNy40QzYwNCA2MzYu MSA1NjIuNSA1OTcgNTEyIDU5N3MtOTIuMSAzOS4xLTk1LjggODguNmMtLjMgNC4yLTMuOSA3LjQt OC4xIDcuNEgzNjBhOCA4IDAgMCAxLTgtOC40YzQuNC04NC4zIDc0LjUtMTUxLjYgMTYwLTE1MS42 czE1NS42IDY3LjMgMTYwIDE1MS42YTggOCAwIDAgMS04IDguNHptMjQtMjI0YTQ4LjAxIDQ4LjAx IDAgMCAxIDAtOTYgNDguMDEgNDguMDEgMCAwIDEgMCA5NnoiLz4KICA8cGF0aCBmaWxsPSIjMzMz IiBkPSJNMjg4IDQyMWE0OCA0OCAwIDEgMCA5NiAwIDQ4IDQ4IDAgMSAwLTk2IDB6bTIyNCAxMTJj LTg1LjUgMC0xNTUuNiA2Ny4zLTE2MCAxNTEuNmE4IDggMCAwIDAgOCA4LjRoNDguMWM0LjIgMCA3 LjgtMy4yIDguMS03LjQgMy43LTQ5LjUgNDUuMy04OC42IDk1LjgtODguNnM5MiAzOS4xIDk1Ljgg ODguNmMuMyA0LjIgMy45IDcuNCA4LjEgNy40SDY2NGE4IDggMCAwIDAgOC04LjRDNjY3LjYgNjAw LjMgNTk3LjUgNTMzIDUxMiA1MzN6bTEyOC0xMTJhNDggNDggMCAxIDAgOTYgMCA0OCA0OCAwIDEg MC05NiAweiIvPgo8L3N2Zz4=