Our mission is to empower traditional creators & brands to unlock the full potential of NFTs.
Traditional creators mostly care about three main things: (1) growing their audience, (2) engaging & reward loyal fans, (3) monetizing from new revenue streams. NFTs unlock opportunities for each of these needs; however, traditional creators have been held back by crypto complexities, high gas fees and limited UX.
Product Details
Memento enables creators to release digital collectibles for a consumer audience which can be claimed in 1 single click.
Creators can use this product to create an NFT. Once created & deployed on-chain, they can share a claim page to their fans via a link or embeddable widget. Fans can then collect the item with just an email address in 1 click.
Fans who collect the NFT will have an account abstraction wallet created for them using email as the log-in method, and they’ll receive the collectible in that wallet without having to worry about gas fees.
Creators can log into the product to see their collectors and grow their email contact list. We’re already seeing creators use this as a reward mechanism to build out their email list & engage with their audience.
Optionally, creators can enable payments for the collectible which will require a credit card payment to purchase the NFT.
For the SCA, we use counterfactual addresses so that we don’t need to deploy unnecessarily
The EOAs are owners of the SCA. The SCA store the Mementos (ERC-721 tokens) collected by the FAN.
If an SCA requires deployment, we can leverage the 1Balance and Relay app created for Mementos to do a meta-transaction for the SCA deployment.
Claims
Collectors can claim / collect Mementos with just their email.
New users provide their email to the app and the app generates a counterfactual SCA address for them
Gelato’s 1Balance and Relay app is setup with a MultiSend smart contract
a. MultiSend is allow listed and our app stores the addresses for NFTs created
Stripe payments are required for NFTs that are purchased instead of claimed for free.
Other
App is setup to work on Goerli Base network
Custom smart contracts:
NFT Factories
Multisend
Safe Factory
Gelato Network Relay app has the custom smart contracts added
Integrations
Safe Account Abstraction SDK & Web3auth
@safe-global/auth-kit is used to create EOA accounts for users when they sign in or collect a memento with their email
Safe Contracts
We’ve written a custom wrapper to use Safe contracts to deploy a safe but we added a few functions to easily generate the CREATE2 address
Base
Our contracts are deployed to the Safe ecosystem
NFT Factory contracts
Multisend contract
This is used to do mints (since NFT contracts will each have different addresses); we’ll prepare the transaction data and then send it over to this contract
This contract has an allowlist (only Relay app and us are able to use it at this time; will probably add more restrictions as time passes so that our 1Balance account is not drained)
Safe Factory contracts
Gelato
We’ve set up a 1Balance account on Goerli so that we can leverage Gelato Relay Apps on Base Goerli. We use the Relay App to interact with NFT Factory, Multisend, and Safe Factory contracts
Stripe
Users can accept payments for card payments for their NFT using Stripe. We use the stripe npm package and stripe webhooks to facilitate this
When a creator is creating a memento, they have the option to add a price
If a price is added, the creator is prompted to setup a merchant account via stripe onboarding flow
Once a merchant account is approved we allow creator to create a memento with a price, and we create a product record for the memento in stripe
When collectors mint a paid memento, they’re redirected to the stripe checkout to complete their purchase
Once the purchase is complete, the memento it collected
Achievements
Team Information
Stephen <> Role: product 📲 <>Twitter: @StSongz
Vali <> Role: design 🎨 & dev 👨💻 <>Twitter: @vali_eth