Q402 Architecture

Q402 is Quack AI’s production implementation of the open x402 protocol standard — a universal sign-to-pay and delegated execution framework for on-chain transactions. It powers gasless, policy-aware settlements across all EVM-compatible networks through verifiable signatures and compliant relays.

The x402 BNB rollout marked the first successful deployment of this architecture on BNB Chain, validating real-world scalability and user adoption for gasless governance and payment execution.

Core Framework

Version	Network Focus	Technical Standard	Key Innovation
Q402	Multichain (EVM)	EIP-7702 Delegated Execution + EIP-712 Witness Signatures	Unified Sign-to-Pay across all EVM chains with policy enforcement and compliance hooks
x402 BNB	BNB Chain	EIP-7702 Delegated Execution + EIP-712 Witness Signatures	First production deployment of the Q402 architecture demonstrating gasless governance execution

Why Q402 Matters

Q402 provides a universal execution fabric for the Agent Economy, where governance, payments, and compliance operate under one rule-driven standard. It ensures that on-chain actions — from DAO votes to RWA settlements — can be completed with one verifiable signature and zero gas friction.

Architecture Overview

Component	Function
Signature Layer (EIP-712)	Captures user intent and cryptographically binds payment or governance data.
Delegated Execution (EIP-7702)	Allows facilitators to submit and sponsor user transactions securely.
Permit2-Mode Adapter	Provides compatibility for tokens without ERC-3009 support through scoped one-time approvals.
Facilitator Network	Manages gas sponsorship, monitors compliance, and maintains verifiable receipts.
Policy Engine Hooks	Validates every action against expiry, limits, and whitelisted conditions.
Audit Registry	Records signature-to-transaction mappings for on-chain traceability and reporting.

Proven Results from the x402 BNB Launch

• Demonstrated gasless execution at scale on BNB mainnet and testnet

• Supported ERC-20 tokens without requiring upgrades

• Achieved near-zero transaction failure rate

• Reduced governance settlement latency by over 70%

• Established compliance and audit-ready proof of execution

The Path Forward

Q402 continues to evolve beyond its BNB deployment. Future expansions focus on:

• Deeper multi-chain facilitator registry integration

• Enhanced policy modules for regulated RWA flows

• Expanded SDKs and API coverage for developers