SubsCrypt
ETH Global Prague 2025 🏆

Private On-Chain Subscription Payments

SubsCrypt leverages EIP-7702 and Vlayer ZK-proofs to create the first truly private, decentralized subscription payment system. Pay for services without revealing your identity.

Revolutionary Features

Combining cutting-edge blockchain technology with privacy-first design

Hidden Email Identity
Authenticate with your email while keeping your identity hidden on-chain using Vlayer Email Proof
P2P Privacy Payments
Ephemeral payment EOAs funded through privacy-preserving protocols ensure complete anonymity
Non-Interactive Payments
EIP-7702 enables automatic recurring payments with just one initial signature
Multi-Chain Support
Seamless cross-chain payments with 1inch Fusion+ integration for optimal liquidity
Liquid Streaming
Service providers can pull accrued payments in real-time based on usage duration
No Key Management
Users don't need to manage private keys - email authentication handles fund recovery

How SubsCrypt Works

A simple 9-step process that revolutionizes subscription payments

1

Payment Initiation

User clicks the payment button to start the subscription process

2

Subscription ID Generation

App backend generates a random seed representing a unique subscription ID

3

EOA Key Generation

User generates a 'payment' EOA private key in the frontend

4

Authorization Signing

User signs the authorization tuple that sets up delegation smart contracts

5

Email Transmission

User sends the authorization tuple through email to the service backend

6

On-Chain Delegation

Service backend submits the transaction with delegation and email proof verification

7

Private Funding

Payment EOA is funded using privacy-preserving protocols

8

Automated Payments

Service provider can now pull funds periodically based on service duration

System Architecture

A comprehensive view of SubsCrypt's innovative architecture

User Frontend
  • Ephemeral EOA generation
  • Email authentication
  • Authorization signing
On-Chain Components
  • SubsCrypt delegation contracts
  • 1inch Fusion+ integration
  • Multi-chain service accounts

Built With Cutting-Edge Technology

EIP-7702Vlayer ZK-Proofs1inch Fusion+EthereumZero-Knowledge ProofsSmart Contracts

Ready to Experience Private Subscriptions?

Join the future of privacy-preserving payments. Set up your first private subscription in minutes.