Events

The SDK emits 10 typed events via Anchor’s log-based event system. All field names are camelCase (the SDK normalizes from the on-chain snake_case).

WebSocket subscription

Use subscribeAll to listen to every event in real time.

TypeScript

const sub = client.events.subscribeAll((event) => {
  switch (event.name) {
    case "BetPlacedEvent":
      console.log("New bet on", event.data.market.toBase58());
      break;
    case "PayoutClaimedEvent":
      console.log("Payout claimed:", event.data.payoutAmount);
      break;
  }
});

// Tear down when done
sub.unsubscribe();

Typed single-event subscriptions

For type-narrowed callbacks, use the subscribe method or the on* convenience helpers.

TypeScript

// Generic typed subscription
client.events.subscribe("MarketCreatedEvent", (data) => {
  // data is typed as MarketCreatedEvent
  console.log("New market:", data.marketId, data.question);
});

// Convenience helpers
client.events.onBetPlaced((data) => {
  console.log("Bet placed on market", data.market.toBase58());
});

client.events.onPayoutClaimed((data) => {
  console.log("Payout claimed:", data.payoutAmount);
});

Subscription options

TypeScript

const sub = client.events.subscribeAll(callback, {
  commitment: "confirmed",   // "processed" | "confirmed" | "finalized"
  onError: (err, source) => {
    // source: "parse" (log decode error) or "callback" (your handler threw)
    console.error(`Event error [${source}]:`, err);
  },
});

Connection.onLogs does not auto-reconnect after a WebSocket drop. For long-lived subscriptions, detect WS disconnection and call sub.unsubscribe() + re-subscribe.

Poll-based events

For environments without WebSocket support (some mobile wrappers, serverless functions):

TypeScript

const events = await client.events.pollEvents({
  before: "lastSignatureFromPreviousPoll",
  limit: 50,
});

// events: Array<{ signature, slot, event: CypherEvent }>

Parse from transaction logs

If you already have a transaction’s log array (e.g., from sendAndConfirmTransaction), parse events directly:

TypeScript

const events = client.events.parseLogs(txLogs);
// events: CypherEvent[]

Event reference

MarketCreatedEvent

Emitted when a new market is created.

Field	Type	Description
`marketId`	`bigint`	Assigned market ID
`marketType`	`number`	`0` = YesNo, `1` = MultiOutcome
`category`	`number`	Category enum (0-6)
`creator`	`PublicKey`	Creator wallet
`question`	`string`	Market question text
`closeTime`	`bigint`	Unix timestamp when betting closes

BetPlacedEvent

Emitted when a bet is placed. The amount and side are still encrypted at this point.

Field	Type	Description
`market`	`PublicKey`	Market PDA
`user`	`PublicKey`	Bettor wallet
`encryptedAmount`	`Uint8Array`	32-byte ciphertext
`encryptedSide`	`Uint8Array`	32-byte ciphertext
`nonce`	`bigint`	Encryption nonce (u128)
`entryOdds`	`bigint`	Locked odds × ODDS_SCALE

MarketResolvedEvent

Emitted by the Arcium callback after the MPC reveal circuit runs.

Field	Type	Description
`market`	`PublicKey`	Market PDA
`outcome`	`number`	Winning outcome index
`revealedPool0`	`bigint`	Revealed plaintext pool for outcome 0
`revealedPool1`	`bigint`	Revealed plaintext pool for outcome 1
`revealedPool2`	`bigint`	Revealed plaintext pool for outcome 2 (multi)
`revealedPool3`	`bigint`	Revealed plaintext pool for outcome 3 (multi)
`payoutRatio`	`bigint`	Payout per unit stake × ODDS_SCALE

MarketCancelledEvent

Emitted when a market with zero bets is cancelled.

Field	Type	Description
`market`	`PublicKey`	Market PDA
`creator`	`PublicKey`	Creator wallet
`bondReturned`	`bigint`	Amount returned to creator

CreatorWithdrawnEvent

Emitted when the creator pulls their bond + LP fees.

Field	Type	Description
`market`	`PublicKey`	Market PDA
`creator`	`PublicKey`	Creator wallet
`bond`	`bigint`	Bond amount returned
`lpFees`	`bigint`	LP fees earned
`total`	`bigint`	Total transferred

PayoutClaimedEvent

Emitted when a winner claims their payout.

Field	Type	Description
`market`	`PublicKey`	Market PDA
`user`	`PublicKey`	Claimant wallet
`payoutAmount`	`bigint`	Amount received in micro-USDC

RefundClaimedEvent

Emitted when a bettor claims a refund from an unresolved market.

Field	Type	Description
`market`	`PublicKey`	Market PDA
`user`	`PublicKey`	Claimant wallet
`refundAmount`	`bigint`	Amount refunded in micro-USDC

ResolutionFlaggedEvent (v0.2+)

Emitted when anyone flags a pending resolution during the challenge window.

Field	Type	Description
`market`	`PublicKey`	Market PDA
`flaggedBy`	`PublicKey`	Wallet that raised the flag

MarketFinalizedEvent (v0.2+)

Emitted when a pending resolution is finalized after the challenge window elapses undisputed.

Field	Type	Description
`market`	`PublicKey`	Market PDA
`outcome`	`number`	Winning outcome index
`payoutRatio`	`bigint`	Final payout ratio × ODDS_SCALE

ResolutionOverriddenEvent (v0.2+)

Emitted when an admin overrides a disputed resolution.

Field	Type	Description
`market`	`PublicKey`	Market PDA
`oldOutcome`	`number`	Original outcome that was disputed
`newOutcome`	`number`	Corrected outcome
`newPayoutRatio`	`bigint`	Recomputed payout ratio
`admin`	`PublicKey`	Admin wallet that performed the override

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Reference

Changelog

WebSocket subscription

Typed single-event subscriptions

Subscription options

Poll-based events

Parse from transaction logs

Event reference

​WebSocket subscription

​Typed single-event subscriptions

​Subscription options

​Poll-based events

​Parse from transaction logs

​Event reference

WebSocket subscription

Typed single-event subscriptions

Subscription options

Poll-based events

Parse from transaction logs

Event reference