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SlainAds

SlainAds allows users to sell their browsing data directly to advertisers, without intermediaries, and get paid automatically in cryptocurrency (XRP) without ever compromising their privacy.

Description Technical Details GitHub

Demo Video

Project Information

At a Glance

SlainAds allows users to sell their browsing data directly to advertisers, without intermediaries, and get paid automatically in cryptocurrency (XRP) without ever compromising their privacy.

Description

**GOOGLE SLIDE : ** https://docs.google.com/present

🚀 Stop being the product, start being the owner

The Problem

Today, Google and Meta generate billions of dollars by selling your browsing data. You are the source of this wealth, but you don’t see a penny of it, and your privacy is constantly compromised by opaque trackers.

The Solution

SlainAds is the first extension that transforms your browsing history into a financial asset that you control and monetize directly.

Privacy-First

Your data never leaves your device. SlainAds proves to advertisers that you match their target audience without ever showing them what you’ve viewed.

Automatic Payment

By using the XRPL ledger, we eliminate intermediaries. You receive XRP instantly and atomically as soon as an advertiser accesses your profile.

Value Proposition

We offer brands “Zero-Party” data of unmatched quality, proven and 100% RGPD-compliant, while giving financial power back to the user.

Technical Details

**GOOGLE SLIDE : ** https://docs.google.com/present

1. Browser Extension (The Prover)

  • Local Scoring: Analyzes browsing history locally to compute an interest score ($Score = \sum Score_{base} \times \log(dwell)$).

  • Privacy: Encrypts scores via nacl.secretbox and generates Zero-Knowledge Proofs (Boundless zkVM) to ensure data authenticity without revealing history.

  • On-Chain Anchor: Publishes a CredentialCreate (XLS-40) on XRPL with a compact binary URI containing the encrypted payload.

  • Auto-Claim: Automatically monitors and fulfills incoming Escrows (EscrowFinish) to claim XRP rewards.

2. DSP Marketplace (The Verifier)

  • Real-time Scanning: Monitors the groth5 Devnet for new Credentials via WebSockets.

  • Conditional Purchase: Initiates an EscrowCreate (Atomic Swap) to buy data access using PREIMAGE-SHA-256 conditions.

  • Decryption & RTB: Extracts the key from the ledger upon Escrow completion, decrypts the score

Source code Demo

Team

2
OD

Olivier Delmas

AR

Andritiana joela Rasamimanana

Hackathon

HACK THE BLOCK 2026 Paris Blockchain Week XRPL Hackathon

Duration

Apr 11, 6:30 AM - Apr 12, 6:00 PM UTC

View Hackathon Details