GSN-Based metacoin.

This a basic metacoin, with minimal modifications to support working through GSN, without the client paying for gas. You still need a wallet, but only for signing transactions, not paying for them.

See https://github.com/opengsn/gsn for the GSN project.

The Metacoin itself pays for all transactions.

Other than supporting GSN, the project added links to tenderly and etherscan, to ease seeing the various components on the blockchain

Running the project locally

The "TL;DR"

1. Run yarn install
2. Run truffle develop to run local ganache and truffle console
3. In the truffle console run migrate to deploy the contracts
4. In another terminal run yarn run dev to run metacoin demo on http://localhost:8080
5. Open a browser, and you can mint, and send coins, with no eth in your (metamask) account

NOTES:

Alternatively, steps 2 and 3 you can accomplish starting gsn-with-ganache script that does 2 things:

• Starts ganache with same chainId and networkId (to overcome limitation of Metamask)
• calls npx gsn start, to start all GSN components locally.

Deploying the instance of GSN HUB to Mumbai network

1. Run yarn install
2. Add pass12 file to the root of project with mnemonic words inside
3. Fund the accounts using this faucet: https://faucet.matic.network/
4. Run npx gsn deploy --mnemonic ./pass12 --workdir . --network https://rpc-mumbai.maticvigil.com