The DAI Stablecoin System incentivizes external agents, called keepers, to automate certain operations around the Ethereum blockchain.

cdp-keeper is responsible for actively monitoring and managing open CDPs. At the beginning it was capable only of topping them up if they get too close to the liquidation level, but now more advances paths are being developed (like automatically wiping the debt instead of topping-up, managing the SAI volume within specific range etc.). This keeper is still under development.

It only monitors cups owned by the --eth-from account. Cups owned by other accounts are ignored.

https://chat.makerdao.com/channel/keeper

If the CDP collateralization ratio goes below --min-margin and at the same time the debt is greater than --max-sai, it tries to wipe some debt targeting --avg-sai. if wiping that debt didn't help to bring collateralization ratio above --min-margin (or it wasn't possible to wipe at all for some reason, for example the keeper didn't have any Dai), it then tries to lock some extra collateral in order to bring collateralization ratio at least to --top-up-margin

Both --min-margin and --top-up-margin are expressed as on top of the current liquidation ratio configured.

If liquidation ratio is 1.50 (= 150%), then if you set --min-margin 1.0 it will try to top-up if below 250%

This project uses Python 3.6.5.

In order to clone the project and install required third-party packages please execute:

git clone https://github.com/makerdao/cdp-keeper.git
cd cdp-keeper
git submodule update --init --recursive
pip3 install -r requirements.txt

For some known Ubuntu and macOS issues see the pymaker README.

usage: cdp-keeper [-h] [--rpc-host RPC_HOST] [--rpc-port RPC_PORT]
                  [--rpc-timeout RPC_TIMEOUT] --eth-from ETH_FROM
                  --tub-address TUB_ADDRESS --min-margin MIN_MARGIN
                  --top-up-margin TOP_UP_MARGIN --max-sai MAX_SAI --avg-sai
                  AVG_SAI [--gas-price GAS_PRICE] [--debug]

optional arguments:
  -h, --help            show this help message and exit
  --rpc-host RPC_HOST   JSON-RPC host (default: `localhost')
  --rpc-port RPC_PORT   JSON-RPC port (default: `8545')
  --rpc-timeout RPC_TIMEOUT
                        JSON-RPC timeout (in seconds, default: 10)
  --eth-from ETH_FROM   Ethereum account from which to send transactions
  --tub-address TUB_ADDRESS
                        Ethereum address of the Tub contract
  --min-margin MIN_MARGIN
                        Margin between the liquidation ratio and the top-up
                        threshold
  --top-up-margin TOP_UP_MARGIN
                        Margin between the liquidation ratio and the top-up
                        target
  --max-sai MAX_SAI
  --avg-sai AVG_SAI
  --gas-price GAS_PRICE
                        Gas price in Wei (default: node default)
  --debug               Enable debug output

See COPYING file.

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