Layer 2: Q402 Execution Fabric

The Q402 Execution Fabric is the transaction backbone of Quack AI’s autonomy architecture. It unifies payments, settlements, and policy enforcement through a single sign-to-pay system.

Q402 is Quack AI’s gasless payment protocol built on EIP-7702 + EIP-712. It allows users and agents to complete any on-chain action — payments, distributions, upgrades, or votes — by signing once, without holding gas tokens or executing manual approvals. Q402 supports any ERC-20 token without requiring token-side upgrades and is currently live across 7 EVM mainnets: Ethereum, BNB Chain, Avalanche C-Chain, X Layer, Mantle, Stable, and Injective EVM.

How It Works

Step	Action	Component	Output
1	User or agent signs an EIP-712 witness + EIP-7702 authorization	Q402 SDK + Wallet	Intent, parameters, and delegation defined
2	Relayer or facilitator submits transaction	Q402 Relay Layer	Gas sponsored and verified
3	Policy Engine validates compliance	Policy Module	Rule checks and limit enforcement
4	On-chain execution settles	Smart Contracts	Transfer, payout, or action finalized
5	Audit trail recorded	Q402 Registry	Signature linked to transaction hash

Key Capabilities

• Gasless Transactions — Users or agents can act even with zero native token balance.

• EIP-7702 Delegated Execution — Works with any existing ERC-20 token. No ERC-3009 support, token upgrades, or prior approvals needed.

• Programmable Policies — Limits, expiry, whitelists, and audit hooks built in.

• Facilitator Network — Agents or relayers that pay gas and maintain receipts.

• Verifiable Receipts — Each signature produces a traceable transaction hash for audits.

Example Use Cases

Scenario	Outcome
DAO payouts	Distributions settle instantly after governance approval
RWA redemptions	NAV-based withdrawals with audit-proof receipts
Merchant or affiliate payments	One-signature settlements under policy guardrails
Agent-to-agent transactions	Automated data or API payments between AI systems

Q402 turns on-chain execution into a seamless experience — one that combines the simplicity of Web2 payments with the verifiability and decentralization of Web3.