dai-auction-keeper

Example model for the DAI cryptocurrency auction-keeper bot.

I offer no assistance with this code, and take no responsibility for loss in funds, etc.

Requirements

• node.js 12
• understanding of node.js / javascript / typescript
• have a working auction-keeper bot ready to accept a model

Architecture

• All code is in /src/
• Entrypoint for the model is in bin/<currency>.ts

Executing the model does the following

• runs init.ts
• starts reading stdin and sends data to stream.ts
• stream.ts will take in any incoming bids from the auction-keeper and feeds the data into bid.ts
• bid.ts fetches the current market rate for the currency being auctioned; logic to determing bidding price is executed here, and a bid price is returned to stream.ts
• if the bid price > 0, stream.ts fetches gas prices, and uses the fast value to determine the gas price to pay for setting the bid
• the bid is sent out via stdout to auction-keeper
• the cycle re-starts every 10 mins of no new bids (so the model can be re-executed against a new market rate), or when a new bid arrives
• auction-keeper will terminate the model process when the auction is over

Usage

Configuration

Environment settings

Create a .env file in this project with the following data:

# This is used to skip incoming bids that were made by your address
# so you do not end up outbidding yourself
ETH_ADDR=<Your ethereum address>

Build pricing model logic

bid.ts is where you would write your model pricing logic.

Return a non-zero value to make a bid.

Be aware that for dent auctions, there are specific rules that determine the price you should send.

By default, it will not send a bid (by returning a 0 price). You must define logic to determine what bid to send.

Building

$ npm run build

The built files are located in build/.

Executing

• Make sure the build/bin/* files have read/execute permission
• Logs are written to /tmp/auction-${currency}-${auction-id}.txt
• Execute the model using bin/bat.ts for BAT and bin/eth.ts for ETH auctions.

$ <path-to-auction-keeper>/flip-eth-a.sh <path-to-dai-auction-keeper>/build/bin/eth.js

Troubleshooting

If you are unsure if the auction-keeper bot is sending a bid, enable the --debug flag in the auction-keeper options to see if the bid was sent or not.

Disclaimer

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