Out·li·ers

ERC20R and ERC721R: Theft Reversibility on Ethereum

Kaili Wang

Blockchains are meant to be persistent: posted transactions are immutable and cannot be changed. As a result, when a theft takes place, there are limited options for recovering the disputed transaction, and this has led to significant losses in the blockchain ecosystem. In this paper we propose token standard extensions of ERC-20 and ERC-721 with support for recoverability.With these new standards, a transaction is eligible for reversal for a short period of time after it has been posted on chain. After the dispute period has elapsed, the transaction can no longer be reversed. Within the short dispute period, a sender can request to reverse a transaction by convincing a decentralized set of judges to first freeze the disputed assets, and then later convincing them to reverse the transaction. Supporting recoverability in the context of ERC-20 and ERC-721 raises many interesting technical challenges. This paper explores these challenges and proposes a design for our ERC-20R and ERC-721R standards, the reversible versions of ERC-20 and ERC721.

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Dataleap

Jan Ruettinger, Jan Damm

Dataleap is a fully managed data warehouse for web3. We reduce the time needed to build customized data pipelines from weeks to minutes. More info coming soon...

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Small Brain Games

Anonymous Small Brain

Small Brain Games builds games that are: 1. Are open source and fully on-chain 2. Are for anybody–not just crypto-native users 3. Are about persistence and composability (less so than ownership) The first game is Words3, a PvP word game on Optimism. See results at: LINKwords3.xyz/statsLINK Why are we doing this? There’s a tension present in web3 go to markets–it’s easier to get early adopters/people excited about the tech, but every “proven” go to market (tokens, pfp drop, etc.) have misaligned incentives. The best way to figure this out is to do the opposite–get as many promising shots on goal as possible.

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ConvexSwap

Sara Abdali, Erfan Rostami

While executing large trades, there is often a high amount of slippage. As these orders get close to completion, the swap price increases drastically, and therefore the trade ends up being expensive and capital inefficient. Additionally, with large trades on the blockchain, the security risks are heightened as nothing is reversible. ConvexSwap solves both of these problems by streaming the trade over time. The stream cannot only be stopped at any time for security purposes, but also prevents a price shock on the exchanges and ensures that there is time for liquidity pools to revert to their average volume, so slippage will be lower. While streaming leads to price impact, it increases the gas fees as multiple transtaction happen to complete the trade. This leads to a convex cost function for any trade that can be solved for deterministically. Our trading platform solves for this optimal value of streaming time with lowest slippage and gas fees.

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Nordle

Jongwon Park, Yuma Tanaka

For a typical NFT project, once art is generated from traits and minted as an NFT, not much happens with the NFT’s art. Nordle is different, it’s interactive with a rewarding mechanism for larger collections. Newly minted NFTs contain simple phrases like "unicorn", "this", or "happy". These phrases are then used as prompts to OpenAI's DALL-E to generate the corresponding image. Once the user acquires two or more Nordle NFTs, she can combine the NFTs to produce a new Nordle NFT! If the user owns a “unicorn” NFT and a “happy” NFT, she can call our contract to combine the words in the desired sequence, generating a new random image with the newly combined words. Now the user gets the “happy unicorn” NFT (or “unicorn happy”) and burns the old NFTs (the record is still maintained). This process can be repeated infinitely to fully reap the benefit of DALL-E while rewarding the collection of cool and/or transitory words!

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