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Zero-Knowledge Proofs: what are zk-STARKs and how do they work? (zk-STARK V1)
Building constraints: in order to prove the liability of our exchange, we state three claims: Claim 1: We accumulated every user's values correctly, including the value of each crypto and net value of each user Claim 2: The exchange has not forged a virtual user whose net value is negative to reduce the total exchange liability (An individual user having negative balances is acceptable only if her/his net value is above 0) Claim 3: The total value that the exchange claims accounts for every singlePublished on May 10, 2023Updated on Sep 8, 2025181Event Contracts FAQ
The Up share price subsequently rises to 0.72 USDT, and the user sells all shares: Realized PnL ≈ (0.72 − 0.40) × 100 ≈ +32.00 USDT Note: actual amount received is net of fees.What happens if I hold to expiry without closing early?Published on Apr 16, 2026Updated on Jun 2, 2026Satoshi test FAQ
You'll need to send a random amount specified by us, typically worth 5 USDC, for the test. This amount will be specified during the verification process.4. What happens if I send the wrong amount to the Satoshi test? If the amount sent doesn't match the specified amount for the Satoshi test, the verification will fail. You'll need to restart the test with the correct amount to proceed with your transaction.Your deposit will be locked and you may unlock it by providing the sender's info.Published on May 28, 2024Updated on May 29, 202643How do I set up wallet release for my DEX trading wallet?
Deposit ~5 USD worth of gas tokens. For Solana (SOL): Use a Solana wallet and deposit ~5 USD worth of SOL as gas. On the app, head to the User Center in the top Menu > Security Settings > Account management > Manage DEX access. Enter the User Center page and select Manage DEX access Manage your DEX access easily from the pop-up menu This transfers control of your CeDeFi trading wallet to your chosen wallet address.Published on Sep 24, 2025Updated on Nov 17, 202515% Deposit Match Campaign - Terms and Conditions
The campaign offers up to a 5% match on new crypto or cash net deposits to your OKX account based on the fixed tiered deposit thresholds outlined in Section 5. Qualified new deposits include: on-chain deposits of any crypto to your OKX account; USD cash deposits to your OKX account with ACH bank transfer or via debit card; or Direct purchases of crypto on OKX via ACH bank transfer, debit card, or Apple Pay and Google Pay.Published on Dec 1, 2025Updated on Dec 1, 20252How do total Profit and Loss (PnL) and Grid profits work for Spot Grid?
The fee currencies for buy and sell are different, resulting in slightly different buy and sell amounts Since the BTC trading fee has been deducted, the net BTC obtained after the buy is slightly less. In this example: Buy quantity: 0.00005222 BTC Buy fee: 0.00000005222 BTC Net BTC obtained: 0.00005222 - 0.00000005222 = 0.00005216778 BTC Sell quantity: 0.00005216 BTC This results in a very small remaining BTC balance 2.Published on Jun 20, 2025Updated on May 29, 2026Crypto profit & loss analysis (PnL) FAQ
Cryptos with a net value of less than $10 are not displayed.3. Is the asset and PnL data shown in Crypto PnL Analysis updated in real time? The number of assets changes in real-time, but there is a 5-10 minute delay in PnL.4. Is Crypto PnL analysis sharing available for all cryptos? No, stablecoins do not support PnL sharing at the moment.5. How is cumulative PnL calculated? When the total value of crypto assets is greater than $10, the system will start calculating the cumulative PnL.Published on Apr 3, 2026Updated on May 29, 2026Pay Passkey FAQ
It's worth noting that for your security, we can't access, generate, or modify your Passkey in any way.How do I create a Pay Passkey? A Passkey is created automatically when you set up a Pay account. You need to log into cloud services for backup during Passkey creation. Android users must log into a Google Play account. iOS users need to log into their iCloud account.Where can I manage the Pay Passkey? Head over to Settings > User Center > Security Settings > Passkey Management.Published on Feb 11, 2026Updated on May 29, 2026How do I set up a recurring buy plan?
Example: if you set up a plan to buy $30 of BTC weekly starting on a Tuesday, you'll automatically buy $30 worth of BTC every Tuesday that follows. We only support plans fixed at the cash amount for recurring buy at this time.2. When will my recurring orders be executed? Your recurring orders will be automatically executed at the time you set up your plan and on the frequency you selected.Published on Jan 23, 2025Updated on May 29, 202650How can I do spot trading with the Jupyter Notebook?
In the example below, you are about to place a market order to buy BTC that is worth 100 USD. 1 # market order 2 result = tradeAPI.place_order( 3 instId="BTC-USDT", 4 tdMode="cash", 5 side="buy", 6 ordType="market", 7 sz="100", 8 tgtCcy="quote_ccy" # this determines the unit of the sz parameter. 9 ) 10 print(result)10.4 How can I use the client order ID parameter clOrdId?Published on Sep 29, 2023Updated on May 29, 2026561What's Satoshi test and how do I complete it?
The Satoshi test is a verification process on our platform that involves sending a random amount of cryptocurrency—typically worth 5 USDC—to a target address within a 180-minute window to confirm control. This method is instrumental in verifying that users maintain control over their intended withdrawal addresses. There are several criteria to pass the Satoshi test on our platform. They're as below: The Satoshi test deposit must originate from the correct address intended for verification.Published on May 28, 2024Updated on May 29, 202667Zero-Knowledge Proofs: what are zk-STARKs and how do they work? (zk-Stark V2)
the inclusion of their net value in the total value However, revealing these balances can compromise user privacy.Published on Oct 21, 2024Updated on Feb 11, 202693OKX Trading Rebate Card - Terms and Conditions
The trading fee rebate amount equals the net trading fee amount (exclude the maker rebate if any of your transaction involves a trade by market makers with negative trading fees) you paid each day on UTC+8.Terms and conditions Please note that the value of the rewards may fluctuate and may not be equal in value at the time a recipient has the ability to withdraw based on market fluctuation. Prices of digital assets, including stablecoins, can and do fluctuate at any moment.Published on Oct 9, 2023Updated on May 29, 2026381Understanding OKX's Security Fund
Its sole function is to serve as a financial buffer and a safety net specifically designed to mitigate counterparty risk arising from leveraged trading, including derivatives and futures trading where available. Some other cryptocurrency exchanges may have a similar system in place, typically called an "Insurance Fund".Published on Mar 25, 2026Updated on May 29, 20264US Holiday Campaign - Terms and Conditions
The campaign offers up to a 5% match on new crypto or cash net deposits to your OKX account based on the fixed tiered deposit thresholds outlined in Section 5. Qualified new deposits include: on-chain deposits of any crypto to your OKX account; USD cash deposits to your OKX account with ACH bank transfer or via debit card; or Direct purchases of crypto on OKX via ACH bank transfer, debit card, or Apple Pay and Google Pay.Published on Nov 6, 2025Updated on May 29, 2026