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System Architecture & Topology

Explore the technology stack driving MerchantPro. Understand the off-chain credential indexes, on-chain execution wrappers, and our multi-chain interoperability design.

Batch Payroll UserOperation Flow

1. Biometric Passkey Signing

Admin registers and signs the payroll metadata hash using device biometrics (WebAuthn API).

2. Relayer Validation

Relayer validates the WebAuthn credentials against registered keys, formatting ERC-4337 calls.

3. Paymaster Gas Sponsorship

The Circle Gas Station Paymaster signs the UserOperation, sponsoring network transaction fees.

4. On-Chain Settlement

The Bundler submits transactions, releasing payouts in parallel on Arc L1 via smart contract wallets.

Security & Verification Standards

MerchantPro implements multi-layered security measures to guard business treasuries.

P-256 Signature Verification

Smart account signatures are verified on-chain utilizing gas-optimized P-256 precompiled contracts. This eliminates standard seed phrase vulnerabilities.

Strict Slippage Control

Auto-FX conversions calculate routing fees prior to execution, enforcing tight limits of <2%. Transactions revert automatically in high-slippage states.

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