General FAQ
Short answers to the questions that come up before any path. Each links to the canonical page.
Is this live or Sandbox?
Sandbox. CRX runs on Base Sepolia (chain id 84532), the network operated by Coinbase; no production funds are at risk. The contracts are under independent review and no report is published yet. Treat every security property as stated, not audited; see Audits (~1 min).
Where is collateral held?
In the firm's own segregated CSA on-chain. Both sides post collateral up front, never credit, and it is never pooled with another party's funds. CRX never takes custody. See Collateral (~3 min).
Is CRX a counterparty?
The trade is opened against the CRX Network: the smart-contract risk engine that locks collateral on both sides, opens both sides of the position in one transaction, and keeps the book verifiably net-0. CRX the company operates the network — it publishes the contracts, runs the relayer that carries quotes, and onboards firms.
Does CRX clear or net trades between firms?
No. CRX is not a DCO. Collateral never crosses relationships and there is no shared loss fund. Each position settles against its own locked collateral. See The Risk Engine (~3 min).
Is CRX a DAO?
No. CRX is a company that runs the network. There is no token governance over trades or settlement.
What does settlement pay in?
A stablecoin: USDC or EURC, fixed when the trade opens. The contract computes the difference between the locked rate and the fixing and pays the winning side in that asset. No local currency is ever delivered. See Settlement & Payout (~2 min).
What is actually traded?
One instrument: the non-deliverable forward (NDF). It locks an FX rate today and cash-settles the difference later. Every other product on the network is built on it. See CRX 101 (~3 min).
How to get Sandbox funds?
Two tokens, two taps. Test USDC: the Sandbox MockUSDC contract has a public mint(to, amount). Anyone calls it and mints a balance. Gas (ETH): the Base Sepolia faucet at alchemy.com/faucets/base-sepolia pays test ETH per claim. Contract addresses: Addresses (~1 min).
Where to start?
Read CRX 101 (~3 min) for the model, then run Quick Start (~5 min) for a guided first integration.