Contracts

BlankFX contract addresses on Sepolia (testnet), how they fit together, and their admin controls.

Contracts

Sepolia (testnet)

Contract	Address	Purpose
BlankFXRouterV4	0x2a1d03A2980AB49936eECa88E64DE87A3E170aAa	Swap and payment entry point; routes between pools, charges the transfer fee
Relay router	0xacF2d27a7162155dfFE40470aa4d31fA9F33Bf13	Executes gasless swaps signed via Permit2
USD pool (BlankFXUSDHub)	0x89AD6DcE3d6FA1c70FFCC47F6cfC212F286d1803	USD stablecoins; share token BFX-USD
EUR pool (BlankFXFXPool)	0xc9b3Ffd5A2039cFA3146Ae504f00ffb2Eaf065Ce	EUR stablecoins; share token BFX-EUR
CHF pool (BlankFXFXPool)	0xCB970f0D3A2c744b0aBCbA25246D61088a02467d	CHF stablecoins; share token BFX-CHF
SGD pool (BlankFXFXPool)	0x69e472dB8cB1Ee84C950965889D2d58e4605Bb03	SGD stablecoins; share token BFX-SGD
JPY pool (BlankFXFXPool)	0x745B60F243d6BCAcB90F61aCa2f82FdDD521dc06	JPY stablecoins; share token BFX-JPY
RFQ escrow	0x6f8B33Ff200DEe2F3b86cA0b55697c5a4eF11A16	Holds the taker’s funds until a market maker fills a firm quote
Payment router	0x23cBA29C8C232d2340692AC3afE7761c019c56Ee	Settles payment links and point-of-sale payments
Transfer forwarder	0x2Adf10C1D3B1B374d3DF7c2780ccCc5B8242F576	Same-currency transfers
Risk engine	0x841c322dc9d12B454Ba1ac1b57Fbeb45f5623a7B	Per-pool exposure limits checked on trades
BlankFXAccess	0x58F580a7c1a8Da6055D408b6c2Ca519E1CbF9Ed8	Wallet access tiers and limits
Permit2 (Uniswap)	0x000000000022D473030F116dDEE9F6B43aC78BA3	Canonical token-approval contract used for gasless signing

Token addresses are on Supported tokens. Machine-readable copies: /reference/contracts.json and /reference/tokens.json.

Ethereum (mainnet)

Not deployed yet. Mainnet addresses will be published here, on this page only. Treat any other source as unofficial.

How they fit together

Wallet ──signs──► Relay router (gasless, Permit2) ─┐
Wallet ──tx────► BlankFXRouterV4 ◄────────────────┘
                     │
                     ├── USD pool
                     ├── EUR / CHF / SGD / JPY pools  (oracle + pricing curve)
                     └── Payment router (payment links, point of sale)

Taker ──funds──► RFQ escrow ◄──fills── Market maker

BlankFXAccess + Risk engine: checked on trades and deposits

Access tiers

Every wallet has an on-chain access tier:

Tier	What it can do
Unverified	Swap and pay up to $10,000 per rolling 30 days without registering
Retail / Corporate	Verified wallets: no on-chain volume cap; can supply liquidity
Market maker	Required to fill RFQ quotes

The app and API apply additional off-chain limits (for example, unverified payment value of $2,000 per day). See Compliance & KYC.

Controls

• Pause. Each pool and the RFQ escrow can be paused by the admin in an incident. A paused pool stops swaps, deposits and withdrawals until it is unpaused.
• Upgradeability. The pools and the access contract are upgradeable proxies (UUPS); the routers are not upgradeable and are replaced by redeploying. A timelock on upgrades is planned before mainnet, so changes are announced before they take effect.
• Parameter limits. Fee and risk parameters can only be set within hard-coded bounds (for example, the treasury share of fees cannot exceed 50%, the transfer fee cannot exceed 0.50%).

Audit

An external security audit is in progress. Findings raised so far have been fixed on Sepolia. Mainnet deployment waits for the audit to close.

These are Sepolia (testnet) contracts holding test tokens. Do not send real funds to them.