DExhibition

Home - Check the NFTs available for curation
List - List your NFT for curation
Curate - React with an emoji to an NFT to be entitled for a curation reward
Claim - Once the NFT - curators reacted to - it is sold, curators are entitled to a reward for their curation job

Inspiration

The project takes inspiration from the current NFT trends, the desire for a decentralized social network, the mechanics behind marketplaces, and the game theory of derivatives; we are so excited to present dExhibition, a decentralized NFT social network for curators.

What it does

The platform dExhibition allows NFTs to be not just static elements of a marketplace but brings them to life empowering curators to be rewarded for their curation job on the platform by getting a cut on the curated NFT sale.

From a Defi perspective, dExhibition can also be seen as an NFT derivative exchange where the NFT is the underlying asset and the curation value staked it is the NFT derivative.

Since we are not looking to create another whale platform, the quadratic formula behind the reward calculation prevents users with big capital to outclass normal users.

How we built it

For the on-chain part we are relying on our Marketplace.sol Solidity smart contract, which it is in charge of:

Allowing users to buy an NFT
Allowing curators to react by bonding value - the position of the bonded value of the NFT is represented in the form of ERC1155 minted to the curator
Allowing curators to claim a reward (1% of the sale) once the NFT is sold - ERC1155 representing the bonding are burned to claim the reward.

The contract is live on Mumbai Polygon testnet at:

Marketplace: 0x18af824E41b37dE3a92a9599854ED407A76ff514
Erc20address (our custom version of DAI): 0xE60e6676eCB09bC095D36AB83B46C4695F79372d
Erc1155address (token representing a reaction on an NFT + value in $DAI): 0x4459c282299C439D6915e0a37Fed30e045c431bC

We have used Chainlink External Adapter to use the API Endpoint as a Wolfram to calculate what we identify as the Curator Voting Power, which is the amount of the reward the curator is entitled to.

The contract is fully tested including the Chainlink External Adapter by using the contracts mocks available on the Chainlink Github.

For the front-end, we have used Svelte + TailwindCSS + Daisy UI.

We are using Moralis API to retrieve users & NFTs information in a smooth way.

Challenges we ran into

Coming out with a decent formula for the voting power calculation was challenging. Chainlink helped us a lot here since the on-chain solution we came out with was very expensive in terms of gas. Since we are planning a launch on Ethereum other than Polygon, this allows saving a lot in fees.

Accomplishments that we're proud of

Building a working service with on-chain contracts and nice front-end UI in one month is something we are extremely proud of. This is also the first time we were working together as a team.

What we learned

Complete Chainlink flow
Moralis is so easy to integrate and makes the whole process of retrieving information about users and NFTs so smooth.
Derivatives mechanics