Let's start building our multi-sig wallet app using React and Typescript. In this video I will show you 3 things. 1. How to initialize a React application using Typescript. 2. How to setup Truffle for UI development 3. How to write a function to unlock accounts managed by MetaMask and a function that will keep an eye on the current account used in MetaMask, checking back every second. This isn't the only way to write such functions but this will be a good starting point. Demo: https://multi-sig.netlify.app/ Code: https://github.com/t4sk/multi-sig-wallet Notes: https://smartcontractprogrammer.com/courses/multi-sig-wallet/chapter-02/01-setup/ Metamask: https://metamask.io/ Truffle: https://www.trufflesuite.com/docs/truffle/overview Remix IDE: http://remix.ethereum.org Solidity: https://solidity.readthedocs.io Follow on Twitter: @ProgrammerSmart https://twitter.com/ProgrammerSmart Join me on Discord: https://discord.gg/Ny8sPaj Website: https://smartcontractprogrammer.com ... https://www.youtube.com/watch?v=D-y2XK3YABc

Mapping in Solidity is not iterable unless you internally store all keys that were inserted. #Solidity #SmartContract #Ethereum #スマートコントラクト Remix https://remix.ethereum.org Code https://solidity-by-example.org/app/iterable-mapping/ Take a course https://www.smartcontract.engineer/ Follow https://twitter.com/ProgrammerSmart https://discord.gg/bt8FK2wkcW https://t.me/smartcontractprogrammer https://smartcontractprogrammer.com ... https://www.youtube.com/watch?v=YOjo_lvUhj8

How to write basic tests in Foundry 0:00 - Intro 1:00 - Test setup 1:52 - Passing test 3:52 - Test for error 5:37 - Expect revert 6:36 - Test dec 7:17 - Test verbosity 8:31 - Gas report Code https://github.com/t4sk/hello-foundry Book https://book.getfoundry.sh/ Solidity by Example https://solidity-by-example.org/ Take a course https://www.smartcontract.engineer/ #Solidity #SmartContract #Ethereum #スマートコントラクト Remix https://remix.ethereum.org Follow https://odysee.com/@SmartContractProgrammer:8 https://twitter.com/ProgrammerSmart https://discord.gg/bt8FK2wkcW https://t.me/smartcontractprogrammer https://smartcontractprogrammer.com ... https://www.youtube.com/watch?v=HA0GWauMOsU

Solution to Ethernaut 02 - Fallout https://ethernaut.openzeppelin.com/ Code https://github.com/t4sk/ethernaut Take a course https://www.smartcontract.engineer/ #Solidity #SmartContract #Ethereum #スマートコントラクト Remix https://remix.ethereum.org Follow https://odysee.com/@SmartContractProgrammer:8 https://twitter.com/ProgrammerSmart https://discord.gg/bt8FK2wkcW https://t.me/smartcontractprogrammer https://smartcontractprogrammer.com ... https://www.youtube.com/watch?v=1E0BTVudurM