BlocPaie

Confidential on-chain payroll for the modern workforce.

Pay contractors on Ethereum while keeping every salary amount, payee identity, and payment status fully encrypted on-chain — powered by Zama's Fully Homomorphic Encryption and ERC-7984 confidential tokens.

BlocPaie is an invoice-to-payment platform where companies create on-chain payroll vaults and pay contractors with sponsored, gasless transactions — no MetaMask, no gas fees, no exposed salaries.

• Privacy by default — salary amounts, payee addresses, and cheque statuses are stored as FHE ciphertexts. Nobody on-chain — including the contract itself — can read them in plaintext.
• Passkey-native — wallets are Porto smart accounts backed by WebAuthn passkeys. No seed phrases.
• Gasless — all transactions are sponsored via Ithaca Relay. Companies and contractors pay nothing in gas.
• Two vault modes — a transparent ERC-20 vault for compliance-first setups and a confidential vault for full privacy.

Company                                    Contractor
   │                                           │
   ├─ 1. Create vault (ERC-20 or Confidential) │
   ├─ 2. Deposit USDC / cUSDC                  │
   ├─ 3. Approve invoice                       │
   ├─ 4. Register cheque on-chain              │
   │      └─ Confidential: encrypted payee + amount
   │                                           │
   │                              ┌────────────┤
   │                              │ 5. Execute cheque
   │                              │    USDC / cUSDC transferred
   │                              │ 6. Decrypt cUSDC balance (optional)
   │                              │ 7. Unwrap cUSDC → USDC (optional)
   │                              └────────────┤
   ├─ 8. Withdraw remaining funds              │

The backend stores plaintext invoice metadata — amounts, contractor names, company details, and transaction history — so the dashboard can display information instantly without requiring the user to decrypt on-chain data on every page load. Decryption via Zama's KMS involves on-chain ACL grants and KMS round-trips; caching the results off-chain keeps the UX responsive.

The on-chain contracts never see plaintext. All sensitive values (salary amounts, payee addresses, cheque statuses) are FHE-encrypted client-side in the browser before any transaction is submitted. The backend is a UX layer — the vault contracts are the source of truth for all payments.

BlocPaie treats the blockchain not as a ledger of readable transactions, but as an immutable verifiability layer. Every salary registration, cheque execution, and cancellation is recorded on-chain with a cryptographic commitment — permanently timestamped and tamper-proof — without ever exposing the underlying amounts or identities.

This has meaningful implications for corporate audits and regulatory compliance. An auditor can independently verify:

• That a payment was made, and when
• That the on-chain commitment matches the invoice hash held by the company
• That no cheque was executed without prior registration

All of this is provable without decrypting a single salary figure. Zama's FHE ensures the sensitive details remain confidential while the blockchain guarantees the integrity of the record. As regulatory frameworks around blockchain-based payroll mature, this architecture positions BlocPaie to satisfy compliance requirements without compromising employee privacy.