Protocol
Network and contracts
SAFIX runs on Robinhood Chain, the Arbitrum Orbit rollup built for tokenized stocks and real-world assets.
Why Robinhood Chain
SAFIX lends against tokenized stocks, so it lives where those assets are issued. Robinhood Chain is a permissionless, EVM-compatible layer 2 built with Arbitrum technology. Solidity contracts use standard Ethereum tooling, compatible wallets can connect directly, and gas is paid in ETH.
The public mainnet RPC is rpc.mainnet.chain.robinhood.com. It is rate limited, so production traffic should use dedicated infrastructure.
Real assets on the chain
Robinhood Stock Tokens are standard ERC-20 assets that compatible applications can hold, transfer, and compose. KYB onboarding applies to the authorized participants who mint and redeem the tokens. This standard interface allows SAFIX to evaluate supported Stock Tokens as collateral. Corporate actions arrive through the ERC-8056 scaled amount extension rather than rebasing, and every stock token ships a per-asset Chainlink feed whose price already includes that multiplier. SAFIX reads those feeds directly.
The chain settles around 
USDG alongside bridged stablecoins, and an onchain asset registry enumerates every listed stock token. The pool contract takes its stable asset as a constructor parameter, so the deployed pool can denominate in whichever stablecoin has the deepest local liquidity; on mainnet that is USDG.
USDG · Global Dollar
Primary settlement asset for SAFIX credit lines
Contract architecture
SafixPool
The core. A USDG stability pool with Liquity-style accounting, per-asset collateral configuration, one-time fees, partial liquidation with a keeper incentive, and an optional passport gate on every draw.
PartnershipDesk
The profit and loss sharing track. Partnerships are funded pro rata, capital moves to the operator on activation, returns are reported onchain, settlement can require an independent auditor's approval, and profit splits at the agreed ratio while genuine losses fall on the capital.
PassportRegistry
The credit passport anchor. Approved attesters write a five-check bitmask with optional expiry; the pool and any integrated platform can require a complete passport without seeing the data behind it.
Collateral control plane
The app is the control plane over these contracts: one view of collateral health, available credit, pool deposits, partnership stakes, and every attestation in force, read directly from chain state. Nothing shown there exists anywhere except onchain.
Status
The core contracts and automated keeper are implemented. The test suite covers accounting, liquidation, partnership settlement, price feeds, and stale-price safeguards. Independent review, production configuration, and mainnet deployment remain required release steps.