Force Close

When a partyA has requested to close a LIMIT position but the hedger (partyB) never filled it, after cooldowns the partyA can force it closed at a Muon-oracle-attested price. The SDK wraps the whole flow behind one function that takes just a quoteId.

Force close applies only to a CLOSE_PENDING LIMIT position and is a majors / Rasa feature. It routes forceClosePosition through the AccountLayer _call proxy (the sub-account’s owner signs).

When to use it — the scenario

Force close is the escape hatch for an unresponsive hedger. A partyB may be offline, degraded, or simply not filling your close — the position is stuck CLOSE_PENDING with no counterparty. Force close lets you exit at an oracle price without the hedger, once the protocol cooldowns have passed.

The recommended flow is a two-step “request, then force”:

1. Send a limit close at a price worse than the current market — a lower requested close price for a LONG (you’re selling), a higher one for a SHORT — via limitCloseAuto / useLimitCloseAuto. Setting a worse-than-market price makes the force-close price condition trivially satisfiable: the market has already traded through your price, so step 3 is never blocked by FORCE_CLOSE_PRICE_NOT_REACHED.
2. Wait for a valid price window. The quote sits CLOSE_PENDING until a signable Muon window exists — now ≥ statusModifyTimestamp + firstCooldown + secondCooldown + minSigPeriod (the window [statusModifyTimestamp + firstCooldown, now - secondCooldown] must be at least minSigPeriod long) — and still before deadline - secondCooldown, else the request expires (cancel and retry). useForceCloseEligibility counts this down and only enables the button then, so the price fetch never fires against an empty window.
3. Force close with forceCloseAuto / useForceClose. The Muon oracle attests the price window; because you set a worse price, the gap check clears.

Import

import {
  forceCloseAuto,
  forceClosePosition,
  getForceCloseParams,
  checkForceCloseEligibility,
  findForceCloseWindow,
  checkForceClosePriceReached,
  previewForceClosePrice,
  type ForceCloseParams,
  type ForceCloseEligibility,
} from "@symmio/trading-core";

forceCloseAuto

The one-call, end-to-end flow — pass a quoteId, get a tx hash:

const hash = await forceCloseAuto(config, { account: "0xsub…", quoteId: 42n });

Under the hood it:

1. reads the quote (getQuote) + the protocol force-close params (getForceCloseParams, one multicall);
2. gates on eligibility (checkForceCloseEligibility) — throws FORCE_CLOSE_NOT_ELIGIBLE (not-close-pending / not-limit / cooldown / expired);
3. fetches reference-exchange (Binance) candles over the valid window and finds a bar where the price reached the force-close level (findForceCloseWindow) → the Muon time window; throws FORCE_CLOSE_PRICE_NOT_REACHED when none qualifies;
4. fetches the Muon HighLowPriceSig for that window (getForceClosePriceSig);
5. preflights the on-chain gap check (checkForceClosePriceReached) — throws FORCE_CLOSE_PRICE_NOT_REACHED if the sig doesn’t clear the gap;
6. sends forceClosePosition(quoteId, sig).

getForceCloseParams

Reads the protocol force-close params for a market in one multicall — the inputs to the gate and the price checks:

const { firstCooldown, secondCooldown, pricePenalty, minSigPeriod, gapRatio } = await getForceCloseParams(config, {
  symbolId: 1n,
});

Pure helpers

Framework-free, no network — reuse them to build a custom flow or a UI gate:

• checkForceCloseEligibility({ quote, firstCooldown, secondCooldown, minSigPeriod, now }) → { eligible, reason?, cooldownRemaining }. The button gate + countdown. The cooldown clears only once a valid window exists (firstCooldown + secondCooldown + minSigPeriod), so it never enables the flow during the empty-window gap.
• findForceCloseWindow({ quote, candles, gapRatio, firstCooldown, secondCooldown, now, intervalMs }) → { t0, t1 } | null. Scans candles for the first in-window bar that reached the price (ported from Vibe-ui).
• checkForceClosePriceReached({ sig, positionType, requestedClosePrice, gapRatio }) → boolean. Exact on-chain preflight: LONG needs highest ≥ R×(1+gap), SHORT lowest ≤ R×(1-gap).
• previewForceClosePrice({ sig, positionType, requestedClosePrice, pricePenalty }) → bigint. LONG max(R×(1+pen), avg), SHORT min(R×(1-pen), avg).

forceClosePosition

The low-level single write, for callers that already have the Muon sig (forceCloseAuto calls it last):

const hash = await forceClosePosition(config, { account: "0xsub…", quoteId: 42n, sig });

Query / Mutation options

• getForceCloseParamsQueryOptions(config, { symbolId }) — TanStack query bag.
• forceCloseAutoMutationOptions(config) / forceClosePositionMutationOptions(config) — TanStack mutation bags.

Related

• React useForceClose — the hook wrapper (+ useForceCloseEligibility for the gate).
• Muon getForceClosePriceSig — the HighLowPriceSig attestation.
• Cancel a close — the other way out of a CLOSE_PENDING.