Customs bond collateral · Soroban smart contracts · Stellar testnet

Your bond collateral shouldn't earn 0%.

US importers post $3.6B in customs-bond insufficiencies (FY25). Surety premiums up 200% on tariff spikes. Importers lock 50–100% cash collateral with sureties — earning 0% for a 314-day average lock-up.

TariffShield replaces dead-weight cash with yield-bearing USDC in a Soroban escrow contract. When tariffs spike, the contract auto-tops-up from your reserve bucket. Surety keeps clawback authority. You earn ~4–5% APY on the float.

Try the demoLog in

Soroban escrow contract

One deployed contract on Stellar testnet holds collateral + reserve per importer. Auto-top-up logic runs on-chain; events are immutable + auditable. The contract address is the source of truth.

Yield-bearing USDC

Demo simulates Franklin Templeton BENJI yield (~4–5% APY). Mainnet integration with real BENJI flow is a scoped roadmap item.

Surety clawback authority

The surety partner retains emergency clawback (KYC-aware asset semantics). One contract call drains a defaulting importer's escrow to the surety wallet + freezes the account.

How a tariff spike plays out

  1. You sign up as an importer + register your CBP bond ID. Platform funds a Stellar account for you on testnet via friendbot.
  2. You upload your ACE Portal CSV (or synthetic data at MVP). The platform computes required collateral from annual duties × 10% × 50%.
  3. You deposit USDC into your collateral bucket + a margin into your reserve bucket. Both held by the Soroban contract.
  4. Tariff schedule changes (Section 301 hike, reciprocal regime, AD/CVD order). Your required collateral updates on-chain.
  5. One contract call (auto_top_up) moves the shortfall from reserve to collateral atomically. No paperwork. No re-underwriting. No port hold.
  6. BENJI yield accrues to your account every period. Withdrawals (above required) are one contract call.
  7. If you default, surety calls clawback — all funds move to surety wallet, account freezes. Bond stays good.

MVP runs on Stellar testnet with synthetic CBP data. Live ACE API + surety partner integration + real BENJI flow + mainnet config are scoped roadmap items.