SCIENTIFIC NEXUS — PRIVACY POLICY

Privacy Policy

Last updated: April 2026  |  Effective immediately

1. Who We Are

Scientific Nexus operates the Syrpts Terminal (syrpts-terminal.vercel.app), the DelChain Hub (scientific-nexus-data-chain.vercel.app), and the DataChain block explorer (scientific-nexus-site.vercel.app), collectively referred to as "the Platform."

2. Information We Collect

We collect only the minimum data required to operate the Platform:

• Wallet Address (Public Key): Generated locally in your browser via the Web3 wallet module. The public key is stored on our servers solely to authenticate your signed transactions. We never have access to your private key or seed phrase — these never leave your device.
• Transaction Data: Every transaction you authorise is broadcast to and recorded on the DataChain ledger, which is public by design. This includes token transfers, trades, mints, and USD deposits/withdrawals.
• Email Address: Provided optionally when you configure server-side price alerts. Used exclusively to send alert notifications and never shared with third parties.
• PayPal Identity: When you deposit or withdraw USD via PayPal, PayPal's own privacy policy governs the processing of your payment information. We receive only the transaction amount and a confirmation ID.
• IP Address / Usage Data: Our server logs standard HTTP access information (IP, timestamp, endpoint called) for security and rate-limiting purposes. Logs are retained for no more than 30 days.

3. How We Use Your Information

• To authenticate blockchain transactions via ECDSA signature verification.
• To maintain the integrity of the DataChain public ledger.
• To process USD deposits and withdrawals through PayPal.
• To send price alert notifications that you have explicitly configured.
• To prevent abuse, rate-limit API calls, and maintain platform security.

4. Cookies & Local Storage

The Platform uses browser localStorage to store your encrypted wallet seed phrase (protected by your chosen password), alert preferences, and UI settings. No tracking cookies or third-party analytics are used.

5. Data Sharing

We do not sell or share your personal information with any third party for commercial purposes. The only external services involved are:

• PayPal: For payment processing. Governed by PayPal's Privacy Policy.
• Vercel: Hosts our frontend. Subject to Vercel's Privacy Policy.
• Railway.app: Hosts our backend API. Subject to Railway's Privacy Policy.
• Cloudflare DNS: Used for DNS-TXT domain verification queries only.

6. Blockchain Transparency

All on-chain data — including wallet addresses, transaction amounts, token transfers, and mint events — is stored permanently on the public DataChain ledger and is visible to anyone via the block explorer. This is an inherent property of public blockchain technology and cannot be reversed or deleted.

7. Your Rights

You may request deletion of off-chain personal data (such as your price alert email or domain verification records) by contacting us. Note that on-chain transaction records cannot be deleted as they form the immutable ledger.

8. Security

All API communication is encrypted via TLS/HTTPS. Wallet private keys are generated and stored exclusively on your device and are never transmitted to our servers. Transactions are authenticated using ECDSA P-256 cryptographic signatures.

9. Children

The Platform is not directed at persons under the age of 18. If you believe a minor has registered an account, please contact us and we will remove the relevant data.

10. Changes to This Policy

We may update this policy periodically. Material changes will be announced on the Platform. Continued use after changes take effect constitutes acceptance of the revised policy.

11. Contact

For privacy-related questions or data deletion requests, please open an issue on the Scientific Nexus GitHub repository or contact the platform administrator directly.