> ## Documentation Index > Fetch the complete documentation index at: https://docs.0xmonaco.com/llms.txt > Use this file to discover all available pages before exploring further. # V1.0.85 # Monaco Protocol SDK v1.0.85 Error responses expose their stable code on the new `APIError.serverCode`, and a deactivated account is refused with `ACCOUNT_DEACTIVATED`. Account frames add initial margin, withdrawable collateral and realized PnL, and order snapshot rows report `origin`. Risk-engine money now sits on the 6-decimal USDC grid, a margin limit order resting through the mark is charged as if it filled at the mark, and a perp limit order past the price band is rejected instead of resting. **Action items:** branch on `serverCode` / the WebSocket error code (for example `ACCOUNT_DEACTIVATED`), not on message text; keep margin transfer and allocation amounts to 6 decimal places and order prices at or below 100,000,000 per unit. ## Added ### `APIError.serverCode` `APIError.serverCode` returns the REST error envelope's `code` (for example `ACCOUNT_DEACTIVATED` or `POST_ONLY_WOULD_CROSS`), or `undefined` when there is none. Branch on it instead of the message. See [Error Handling](/sdk/typescript/error-handling#apierror). ### Initial margin, withdrawable collateral and realized PnL on account frames `sdk.ws.account` frames and `account` snapshot rows may carry `initialMarginRequired`, `withdrawableCollateral` and `realizedPnl` (decimal strings), equal to the margin account's fields of the same names. `withdrawableCollateral` is rounded toward zero at 6 decimal places. Absent means unknown, never zero, and the SDK rejects a frame whose present value is not a non-empty string. See [WebSockets](/sdk/typescript/websockets). ### `origin` on order snapshot rows Each `orders` snapshot row (`OrderSnapshotItem`) may carry `origin` (`USER`, `LIQUIDATION`, `ADL`, `COPY` or `SYSTEM`), as `getOrder` reports it, and every order event now carries it, `USER` included. `useUserOrders` takes `origin` from snapshot rows and every order frame: a frame fills in a row's missing `origin` but never replaces one it holds. See [useUserOrders](/sdk/react/hooks/use-user-orders). ### React `login` takes options `useAuth().login(options)` now forwards its options to `sdk.login`, so `connectWebSocket: true` also works from React. See [useAuth](/sdk/react/hooks/use-auth). ## Changed ### Money on the USDC grid Every stored USD amount in the risk engine — collateral, risk bucket allocations and draws, realized PnL, funding paid, margin requirements and order costs — is a whole number of 0.000001 USD. A published `withdrawableCollateral` or `availableOrderCollateral` is exactly what its endpoint accepts, and funding settles zero-sum. Amounts with more than 6 decimals are now refused, with the message ` exceeds supported precision for USDC (6 decimals)`, in these cases: * a margin transfer between accounts, a copy-trading allocation, or a spot-margin collateral transfer of a USDC variant * an order's `riskBucketCollateral` * a margin order on a market whose quote asset has more than 6 decimals The order price ceiling is now 100,000,000 per unit. Reported unrealized PnL is the risk engine's own figure, on the same grid. Request and response shapes are unchanged. See [Trade](/developers/trade). ### Margin through the mark A margin limit order resting through the mark (a sell below the mark, or a buy above it) is charged at admission as if it filled now: its initial margin at the mark, plus the loss it would take against the mark, plus its maker fee. A sell below the mark was previously under-reserved, and a buy above it over-reserved. `availableOrderCollateral` and the automatic draw from the parent margin account follow the same rule. An order on its safe side of the mark is unchanged. See [Perps](/trading-mechanics/perps). ### Perp price band at entry A perp limit order priced past the band on its aggressive side (a buy above the upper edge, or a sell below the lower edge) is now rejected at entry with `INVALID_ORDER` ("limit price is outside the price band"). This applies to every time in force, post-only orders and replacements. Deep passive prices are still allowed. A resting perp order that a mark move leaves past the band is cancelled in the same step, with `terminalReason` `PRICE_BAND` and its collateral released. See [Perp price band](/trading-mechanics/perps#perp-price-band). ## Fixed * **`ACCOUNT_DEACTIVATED`** — a deactivated signing account is refused with `403` `ACCOUNT_DEACTIVATED` on `/auth/verify` and on any signed request. gRPC carries the same reason in `google.rpc.ErrorInfo` (domain `auth.0xmonaco.com`). On the WebSocket, an `Error` frame with code `ACCOUNT_DEACTIVATED` arrives on the handshake or on revalidation, and then the socket closes. The SDK stops reconnecting and calls `onReauthenticationRequired`. See [Session loss](/sdk/typescript/websockets#session-loss-close-code-1008). * **Positions snapshot serves live state** — the `sdk.ws.positions` subscribe-time snapshot builds an open position from the same live state its `position_update` frames carry, under the persisted row's `version`. A snapshot taken while persistence lagged (for example just after an hourly funding settlement) no longer replaces newer values a client already holds. On an equal `version`, a snapshot row now wins on every field (it was `isolatedMargin` only). No field or wire shape changes. See [Positions](/developers/positions). * **Order preview: no-fill `IOC`** — `simulateOrderRisk`, `simulateParentMarginOrderRisk` and `simulateRiskBucketOrderRisk` report an `IOC` order that would not fill with `rejectCode` `INSUFFICIENT_LIQUIDITY`. They previously reported `INVALID_ORDER`. * **Order preview: closing an isolated position flat** — when that close retires the risk bucket (nothing else resting in it and no live TWAP order holding it open), the preview now reports the risk bucket as closed, with `equityAfter`, `initialMarginRequiredAfter`, `maintenanceMarginRequiredAfter` and `freeCollateralAfter` all `"0"`. It previously failed. See [Margin Accounts](/sdk/typescript/margin-accounts). ## Upgrade ```bash theme={null} npm install @0xmonaco/core@1.0.85 @0xmonaco/types@1.0.85 @0xmonaco/react@1.0.85 # or bun bun add @0xmonaco/core@1.0.85 @0xmonaco/types@1.0.85 @0xmonaco/react@1.0.85 ``` Treat `ACCOUNT_DEACTIVATED` as terminal rather than retrying. This documentation is built and hosted on [Mintlify](https://mintlify.com), a developer documentation platform.