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Sybil-resistant decentralized fiat on-ramp for crypto that allows users to trade fiat for crypto through a smart-contract escrow. It limits only Worldcoin ID holders to up to 1k euros and then KYC'd verified by Polygon ID for higher amounts.

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rplusq/le-p2p

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Le P2P Protocol

Screenshot of our App showing Market Offers

Intro

Introducing LeP2P: A Sybil-Resistant Peer-to-Peer Decentralized Fiat On/Off-Ramp for Crypto application that offers a secure and user-friendly platform for trading fiat for cryptocurrencies.

It employs Worldcoin for Sybil-resistance: enhancing security and trustworthiness.

The platform utilizes smart-contract escrows for seamless, intermediary-free transactions.

LeP2P sets initial transaction limits for Worldcoin ID holders at 1,000 euros and requires KYC verification for higher amounts.

The interface is designed to be user-centric and accessible to users of all levels of expertise.

We also store the payment through Web3 Storage, tapping Filecoin and IPFS

Technologies Used

  • WorldCoin for the user authentication so that we can ensure that the app can only be used by real humans.
  • Web3Modal for Wallet Connections
  • Quicknode as our Node RPC Provider
  • Polygon ID for leveraging verifiable credentials, which for our use case, is a KYC that unlocks for bigger volume in our protocol
  • AirStack for querying XMTP enabled wallets
  • Push Protocol for Push Notifications in the app for offer creation, completion, cancellation
  • Web3Storage: IPFS + Filecoin for decentralized hosting of payment proofs
  • The Graph: Indexer for our contract events that serve the protocol current orders and updates them accordingly
  • Polygon Mumbai for our contract deployments
  • Foundry for smart contract development + deployments + testing
  • Next.js with Wagmi + viem for contract interactions in the front-end (shadcn + tailwind <3)

Repo Structure

  • web: Our Next.js App
  • contracts: Our Solidity Contracts + Graph Subgraphs

Our Contract

LeP2PEscrow in Polygon Mumbai

Our Subgraphs

Hosted Service Studio

Collaborators

Born in ETH Global Paris 2023 🥐 Hackers: @fonstack @ReynaldoQuintero @rplusq

About

Sybil-resistant decentralized fiat on-ramp for crypto that allows users to trade fiat for crypto through a smart-contract escrow. It limits only Worldcoin ID holders to up to 1k euros and then KYC'd verified by Polygon ID for higher amounts.

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