AutoBidder

A tiny protocol for bidding on Nouns at auction! It refunds gas and provides a tip for anyone who kicks off a bid on behalf of the contract owner.

Use Cases

• Have others bid on your behalf in Nouns auctions
• Acquire Nouns as a group or community
• Participate in Nouns auctions with minimal overhead

Features

• Configurable tip for anyone kicking off a bid or withdrawal of tokens won
• Gas refunds for bid and withdrawal calls
• As the contract owner you can configure settings like the tip amount, min/max bids, and when one can be placed

Usage

Objective

Anyone can call bid() to help the owner bid on a Noun at auction. This contract will automatically bid the
minimum amount required to win.

Gas Refunds

All calls to bid() and withdraw(nounId) are refunded gas and tipped.

Constraints

• You can only call bid() in the last bidWindow seconds of an auction
  • Call getConfig() to see the current bid window
• You can only call bid() if this contract is not already the highest bidder
• A max bid amount is defined by the contract owner. Calling bid() when the next one would exceed the max bid value will cause the transaction to revert

If an auction is won

After the auction has settled, call withdraw(nounId) to send the Noun to the receiver defined in the contract config and receive a tip for doing so.

Deploying your own

Contract Address: 0x5a2DA0F09d65a0034F4398BdA40df4F8A79a3293

Deploy your own Bidder by calling clone() and seeding it with ETH. This bidder can be configured with min or max bid amounts for auctions. As well as a window of time that bids can be placed.

Share the address with friends and have them call bid() during an active auction.

If the Bidder wins, withdraw(nounId) can be called after the auction is settled.

Things to keep in mind

• Ensure that a contract has more ETH than the max amount you're willing to bid
  • You want to incentivize others to submit bids on your behalf
• It's a good idea to configure a bidWindow that opens towards the end of an auction
  • competing bidders may grief you for tips throughout an extended auction period
• Consecutive bids cannot be made in the same block

Config

t - address of the ERC721 token at auction
ah - address of the auction house
_owner - owner address of this contract

Bidder.Config

maxBid: max bid in wei
minBid: min bid in wei
bidWindow: seconds that a bid can be placed before an auction ends
tip: tip in wei
receiver: address to transfer tokens won at auction

Setting an ENS reverse record

Visit app.ens.domains to create a subdomain under one of your accounts. Add an address record pointing to your deployed AutoBidder contract.

Then you can call setENSReverseRecord on the AutoBidder passing in the ENS subdomain created above.

Version

v0.2

Changelog

v0.2 - Add support for ENS reverse records

v0.1 - Initial release