How Atrium works
A trader hedged across two venues today posts margin twice. Atrium nets the hedge with one unified margin number. One wallet, one collateral pool, many venues. The piece that makes it work is a Stylus risk engine that runs SPAN-style scenarios fast enough to be cheap.
step 1
Deposit once into Coffer
Coffer is an ERC-4626 vault holding USDC. You deposit, you get shares, you can withdraw any time subject to the withdrawal SLA.
step 2
Open positions across venues via Portico adapters
Portico adapters speak IPorticoAdapter v1.0. Atrium ships adapters for Hyperliquid HIP-3, Aave Horizon, Pendle V2, Trade.xyz, Curve, and Polymarket (via Aqueduct CCIP).
step 3
Plinth nets the risk
Stylus-native SPAN scenario matrix runs on every margin recompute. Correlated positions cancel under each scenario. Net required margin lands far below isolated margin.
step 4
Vigil watches the line
Three independent keepers race to liquidate any account that falls under-collateralised. Liquidations are partial (≤10% per block) and NMS-aware (most-liquid venue first).
step 5
Sigil + Postern make agents safe
AI agents act on your behalf via EIP-712 mandates with hard caps and an expiry. Postern issues passkey-bound session keys. One tap of the Kill Switch revokes every mandate and every session key in a single tx.
step 6
Lantern proves reserves
Every hour Lantern publishes a Merkle root of every Coffer balance on chain. The tree is pinned to IPFS. You can verify your own balance with a one-click inclusion proof.
Open standards
IPorticoAdapter v1.0 is MIT-licensed from Day 30. Sigil's EIP-712 schema is published. Curator grants pay $5K ARB per accepted adapter and per accepted reference agent.