Auto-Swap (Deprecated)

Note: Auto-swap has been removed in the Base migration. On the previous X Layer deployment, ZenithPay could automatically swap OKB to USDG when the agent had insufficient settlement token balance. This feature is no longer needed.

Why auto-swap was removed

On Base, the settlement token is USDC — a widely held stablecoin. Agents are expected to hold USDC directly in their Privy-managed wallets. The complexity of an auto-swap layer (native token -> stablecoin) is not justified when:

• USDC is natively available and widely bridged on Base
• Agent wallets can be funded directly with USDC
• Removing the swap step simplifies the payment flow and reduces failure modes

Current payment flow

1. SpendPolicy check (USDC amount)
2. USDC balance check
3. x402 /verify -> /settle on Base
4. Ledger entry written

If the agent has insufficient USDC, the payment is blocked with insufficient_balance. The operator should fund the agent wallet with USDC on Base.