FAQ
General
What is BlankFX?
What is BlankFX?
BlankFX lets businesses get paid in any stablecoin and settle in the one they want. It converts stablecoins within and across currencies on-chain, with published fees and a full audit trail. See What is BlankFX?.
How is BlankFX different from Uniswap?
How is BlankFX different from Uniswap?
Uniswap prices each pair from its own pool ratio. BlankFX holds one pool per currency: same-currency swaps (USDC → USDT) are 1:1 minus a fee, and cross-currency swaps start from an FX oracle rate with a pricing curve on top. Large cross-currency tickets can also be quoted firm by market makers over RFQ. See How the exchange works.
Which networks are supported?
Which networks are supported?
Sepolia (testnet) is live. Ethereum (mainnet) is planned.
Can AI agents pay a BlankFX payment link?
Can AI agents pay a BlankFX payment link?
Yes. A merchant who switches on agent payments lets any x402-compatible agent pay their payment links directly from the agent’s own wallet, with no checkout page and no account. The agent pays the normal transfer fee on top of the invoice, and the merchant receives the full amount. See Agent payments and the developer guide.
Do I need ETH for gas?
Do I need ETH for gas?
Only for the one-time Permit2 approval of each token you sell, and for swaps under $100. Swaps of $100 or more are gasless: you sign a message and BlankFX submits the transaction and pays the network fee.
Earning
Where do earnings come from?
Where do earnings come from?
From swap fees. 80% of every swap fee stays in the pool for its suppliers; 20% goes to the BlankFX treasury. There are no token emissions. See Fees.
Is my deposit locked?
Is my deposit locked?
Newly supplied shares unlock after a cooldown: 5 hours in the USD pool, 5 minutes in the other pools. After that you can withdraw at any time, with no penalty. A pool that is paused during an incident blocks withdrawals until it is unpaused.
Do I need to claim rewards?
Do I need to claim rewards?
No. Fees accrue to the pool, so each pool share is redeemable for more over time.
Can I lose money as a supplier?
Can I lose money as a supplier?
Yes. The main risks are smart-contract bugs, a wrong or stale oracle, a coin in the pool losing its peg or being frozen by its issuer, and imbalance, where the pool is left holding more of a weak coin or currency. See Earn → Risks.
Security
Are the smart contracts audited?
Are the smart contracts audited?
An external audit is in progress, and the findings raised so far have been fixed on Sepolia. Mainnet deployment waits for the audit to close.
Does BlankFX hold my funds?
Does BlankFX hold my funds?
No. Every swap, payment and deposit is signed by your wallet and settled by smart contracts. BlankFX never holds your private keys and cannot recover a lost wallet.
Is there a bug bounty?
Is there a bug bounty?
A bug bounty is planned for the Ethereum (mainnet) launch. Until then, report vulnerabilities to security@blankfx.org.