Settlements
A settlement pulls assets from the global deposit vault, runs an arbitrary onchain interaction — a swap, an LP deposit, a liquidation — and returns assets to the vault, atomically. If any step fails the whole settlement reverts (like a flash loan). No withdrawal is involved, and the clearing engine approves only if the resulting inventory change improves IM surplus. The main use is clearing exposure. A maker fills a buy order and is now short ETH on Tplus; a settlement pulls USDC from the vault, buys ETH onchain (Uniswap), and returns the ETH to the vault — closing the short in one step, with no warehoused inventory. Mechanics, margin checks, and integrator details: Settlement.Finality and re-orgs
Reaching external chains means dealing with probabilistic finality — the same risk a centralized exchange manages when it credits a deposit before the chain finalizes. Deposits and withdrawals wait for the chain’s confirmation policy, then pass a canonical-block check: events on orphaned blocks are dropped and re-ingested from the canonical chain, so no orphaned event is ever applied. Withdrawals execute onchain only against finalized vault state.Cross-margining
An account on an external exchange can count as margin collateral on Tplus, so a maker can quote on Tplus, hedge on the exchange, and have the hedge’s offset recognized on the Tplus side. Every supported asset on a cross-margined exchange becomes quotable on Tplus. Operational details: Cross-margining.Synchronous making
Sync orders combine a fill with a settlement that clears the exposure in the same atomic operation, so a maker can quote an asset it holds no inventory in: at fill time the underlying is sourced from onchain liquidity. Sync takers are spot-only and limited to the primary sub-account. A sync taker carries no settlement request: it names the base token and its vault settlement nonce, and the clearing engine derives the settlement from the fill, approving it for the maker (the settler) to execute on chain. Market makers receive their pending sync-book settlements on the authenticated streamGET /sync/pending_settlements; sync orderbooks are created via POST /sync_book/create. See the Trading API.