This is a simple on-chain OTC market for MKR. You can either pick an order from the order book (in which case delivery will happen instantly), or submit a new order yourself.

MakerOTC is undergoing alpha testing: Proceed at your own risk, and use only small amounts of ETH and MKR.

Overview

This dapp uses Meteor as frontend; the contract side can be tested and deployed using dapple.

Usage (for Users)

Ensure you have a locally running ethereum node.

Installation (for Developers)

Requirements:

• geth brew install ethereum (or apt-get for ubuntu)
• solidity https://solidity.readthedocs.org/en/latest/installing-solidity.html
• meteor curl https://install.meteor.com/ | sh
• Global dapple, npm install -g dapple meteor-build-client

Clone and install:

git clone https://github.com/MakerDAO/maker-otc
cd maker-otc
git submodule update --init --recursive
npm install

Usage (for Developers)

There is a helpful blockchain script for development, which will use a clever mining script similar to Embark. This is entirely optional; you can use any testnet config via RPC on port 8545 and deploy via dapple as normal.

To start the blockchain script:

npm run blockchain

In a new terminal window, you can then build and deploy the dapp:

npm run deploy

Now that the contracts are deployed to the blockchain, you need to build the JS wrappers:

npm run build

To run the frontend, start meteor:

cd frontend && meteor

If you got the error message File not found: build/meteor.js, then you forgot to run the build step from above.

You can access the user interface on http://localhost:3000/

If you find that dapple is deploying to EVM rather than geth, please modify ~/.dapplerc:

environments:
  default:
    # comment out default config
    # ethereum: internal
    # replace with real ethereum node
    ethereum:
      host: localhost
      port: '8545'

To deploy the frontend to Github Pages:

gulp deploy

Gas Costs

new SimpleMarket:   927556 gas
SimpleMarket.offer: 140395-186235 gas
SimpleMarket.cancel: 33882 gas
SimpleMarket.buy:    49306-51707 gas

TODOs

See https://waffle.io/MakerDAO/maker-otc

Acknowledgements

• Simple Market contract by Nikolai Mushegian
• User interface design by Daniel Brockman
• Blockchain Script by Chris Hitchcott