an off-chain signature based multi sig wallet

required: Node plus Yarn and Git

git clone https://github.com/scaffold-eth/scaffold-eth-examples meta-multi-sig

cd meta-multi-sig

git checkout meta-multi-sig

yarn install

yarn start

in a second terminal window:

cd scaffold-eth
yarn chain

🔏 Edit your smart contract MetaMultiSigWallet.sol in packages/hardhat/contracts

📝 Edit your frontend App.jsx in packages/react-app/src

💼 Edit your deployment script deploy.js in packages/hardhat/scripts

📱 Open http://localhost:3000 to see the app

in a third terminal window:

yarn backend

🔧 Configure your deployment in packages/hardhat/scripts/deploy.js

Edit the chainid, your owner addresses, and the number of signatures required:

in a fourth terminal deploy with your frontend address as one of the owners:

yarn deploy

Use the faucet wallet to send your multi-sig contract some funds:

To add new owners, use the "Owners" tab:

This will take you to a populated transaction create page:

Create & sign the new transaction:

You will see the new transaction in the pool (this is all off-chain):

Click on the ellipsses button [...] to read the details of the transaction

Give your account some gas at the faucet and execute the transaction

The transction will appear as "executed" on the front page:

Create a transaction to send some funds to your frontend account:

This time we will need a second signature:

Sign the transacton with enough owners:

(You'll notice you don't need ⛽️gas to sign transactions.)

Execute the transction to transfer the funds:

(You might need to trigger a new block by sending yourself some faucet funds or something. HartHat blocks only get mined when there is a transaction.)

💼 Edit your deployment script deploy.js in packages/hardhat/scripts

🔏 Edit your contracts form, MetaMultiSigWallet.sol in packages/hardhat/contracts

📝 Edit your frontend in packages/react-app/src/views

You may not want every signer to create new transfers, only allow them to sign existing transactions or a mega-admin role who will be able to veto any transaction.

Make a MultiSig wallet to store your precious doodle-NFTs!?

🛰 Ready to deploy to a testnet?

Change the defaultNetwork in packages/hardhat/hardhat.config.js

🔐 Generate a deploy account with yarn generate

👛 View your deployer address using yarn account (You'll need to fund this account. Hint: use an instant wallet to fund your account via QR code)

👨‍🎤 Deploy your wallet:

yarn deploy

✏️ Edit your frontend App.jsx in packages/react-app/src to change the targetNetwork to wherever you deployed your contract:

You should see the correct network in the frontend:

Also change the poolServerUrl constant to your deployed backend (via yarn backend)

Alternatively you can use the pool server url in the above screenshot

You will need to get a key from infura.io and paste it into constants.js in packages/react-app/src:

⚙️ build and upload your frontend and share the url with your friends...

# build it:

yarn build

# upload it:

yarn surge

OR

yarn s3

OR

yarn ipfs

👩‍❤️‍👨 Share your public url with friends, add signers and send some tasty ETH to a few lucky ones 😉!!