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Voucherchain

My contribution for the final project of the Consensys Developer Program 2018.

Local development setup

Prerequisites:

  • ganache-cli is running on port 7545
  • A browser with MetaMask is configured with your ganache-cli
  • truffle is installed

Get in running:

# get the source
git clone https://github.com/d0x/voucherchain

# go into the project directory
cd voucherchain

# migrate the contracts to ganache
truffle migrate

# (optional) check the solidity tests
truffle test

# install all frontend dependencies
npm install

# serve a local fronted on http://localhost:8080
npm start

Now you can direct your browser to http://localhost:8080 and you will see this page:

Screenshot

This dapp can do the following things:

  • As Seller, I want to create vourches.
  • As Seller, I want to revoke my vourchers, so that nobody can buy them.
  • As Buyer, I want to buy available vourches for the given price.
  • As User, I want to have sold and revoked vourchers flagged, so that I can act properly.
  • As User, I want to see my MetaMask Account Address and Balance. (Demonstrates OpenZeppelin EthPM usage)
  • As User, I want to see some Contact Information comming from the blockchain. (Demonstrates OpenZeppelin EthPM usage)
  • As Course Student Auditor, I want to have 3 example vourchers, so something is visible from the beginning.

A few things to note:

  • Wether you see "revoke" or "buy" buttons in the vourcher-footers dependes on the account you are using.
    • You can only revoke your vouchers.
    • You can only buy other vouchers.
  • Changes to your MetaMask account and balance are reflected within the "Your MetaMask account" card.
  • Placing/buying/revoking a vourcher is immediately updated within the UI using solidity events.