Contracts

Deployed contracts (Sepolia testnet)

Contract	Address	Purpose
BlankFXAccess	`0xc3e9A233861a5f5E606aF61fEa5907a0776aA411`	Access control and user permissions
BlankFXUSDHub	`0xC081279f1B241f2530bde7bF46430A4e108C4FfF`	USD liquidity pool (USDC, USDT, RLUSD)
BlankFXFXPool (EUR)	`0xd73C964F0cEb9eA46973292383306c21bd53B23C`	EUR liquidity pool (EURC)
BlankFXRouterV3	`0x171bB65D294ae2F9fC10e77A6AC35141baDd4bD9`	Swap router — routes trades through hub and pools
BlankFXRelayRouter (Gasless)	`0x0C092B9D0D4E34FCd64e518AE8F58ccfC9fD4Ed4`	Gasless relay router via Permit2
Permit2	`0x000000000022D473030F116dDEE9F6B43aC78BA3`	Uniswap Permit2 — used for gasless approvals

All contracts are deployed on Sepolia testnet. Mainnet deployment is pending audit completion.

Architecture

User Wallet
    │
    ▼
BlankFXRouterV3 (swap entry point)
    │           BlankFXRelayRouter (gasless path via Permit2)
    │
    ├── BlankFXUSDHub (USD stablecoin pool)
    │
    └── BlankFXFXPool (foreign currency pools, e.g. EUR)
    
BlankFXAccess (permission checks on every trade)

All swaps go through the Router. The Router checks access permissions, then routes the trade to the appropriate pool(s) based on the token pair. For gasless swaps, users sign an off-chain Permit2 message and the BlankFXRelayRouter submits the transaction on their behalf.

Access control

BlankFX uses a tiered access system. Users must be registered to trade. Access tiers determine maximum trade sizes and available features.

Audit status

Contracts have not yet been formally audited. A third-party audit is planned before mainnet deployment.

BlankFX is currently deployed on Sepolia testnet only. Do not send real funds to these addresses.