Gdex Hl Outcomes

GDEX: HyperLiquid Outcomes (HIP-3 Event Markets)

Trade discrete-outcome event markets running on HyperLiquid HIP-3 permissioned perp DEXes. These are prediction-market-style instruments where each market resolves to a discrete outcome rather than a continuous price.

When to Use

• Listing the currently open / resolved outcome markets
• Getting an account state on an outcomes perp dex
• Opening, cancelling, or closing positions on an outcome market

Prerequisites

• @gdexsdk/gdex-skill installed
• Authenticated via managed custody — see gdex-authentication
• Trading enabled on HL (one-time /v1/hl/enable_trading) — see gdex-perp-trading for the HIP-3 setup flow
• For write operations: a pre-built computedData payload built by the caller using the standard managed-custody encrypted-payload contract (ABI schemas for outcome actions live in src/api/services/ServiceHyperLiquid.ts of the backend)

Backend Endpoints

All read endpoints accept an optional dex query parameter to target a specific HIP-3 perp dex registered via /v1/hl/perp_dexes.

SDK Usage

The SDK builds the encrypted payload for you — pass structured params plus managed-custody credentials (apiKey, walletAddress = your control address from sign-in, sessionPrivateKey). A pre-built computedData is still accepted for advanced callers.

import { GdexSkill } from '@gdexsdk/gdex-skill';

const skill = new GdexSkill();
skill.loginWithApiKey(process.env.GDEX_API_KEY!);

// 1. List markets. Each `mids` key is a coin id: "#<outcomeId><sideIndex>",
//    e.g. "#1010" = outcome 101 / side 0 (Yes), "#1011" = side 1 (No).
const markets = await skill.getHlOutcomes({ status: 'open' });

// 2. Enable trading once before the first outcome order (see Prerequisites).
await skill.hlEnableTrading({ apiKey, walletAddress, sessionPrivateKey });

// 3. Account state for one market (outcomeId is REQUIRED).
const state = await skill.getHlOutcomeAccount({
  userAddress: managedAddress,   // the managed wallet holds outcome balances
  outcomeId: 101,
});

// 4. Place an order. price is a probability in [0,1]; size is in contracts.
const order = await skill.createHlOutcomeOrder({
  apiKey, walletAddress, sessionPrivateKey,
  outcomeId: 101,
  coin: '#1010',        // Yes side of outcome 101
  isBuy: true,
  price: '0.55',        // limit; pass isMarket:true to take the book
  size: '20',
  isMarket: false,
});

// 5. Cancel / close
await skill.cancelHlOutcomeOrder({ apiKey, walletAddress, sessionPrivateKey, outcomeId: 101, coin: '#1010', orderId });
await skill.closeHlOutcomeOrder({ apiKey, walletAddress, sessionPrivateKey, outcomeId: 101, coin: '#1010', price: '0', size: '20', isMarket: true });

Collateral currency (HIP-3 / HIP-4) — swap before trading

Each outcome market is quoted in a specific stablecoin (its quoteToken — USDC, USDH, USDE, or USDT0). HIP-3 and HIP-4 deployments use different quote currencies, so before placing an order you must hold that market's currency in your HL spot balance. If you only hold USDC, swap into the market's currency first with hlSwapCollateral (a HL spot swap), then swap back when done.

// Check the market's currency
const m = (await skill.getHlOutcomes({ status: 'open' })).data.meta.outcomes
  .find((o) => o.outcome === 101);
console.log(m.quoteToken);   // e.g. 'USDH'

// If it's not USDC, swap USDC -> that currency (amount = NON-USDC token amount).
// HyperLiquid enforces a $10 minimum per swap order.
await skill.hlSwapCollateral({
  apiKey, walletAddress, sessionPrivateKey,
  fromToken: 'USDC', toToken: 'USDH', amount: '15',   // buy 15 USDH
});

// ...place / manage outcome orders in that currency...

// Swap leftover back to USDC when finished
await skill.hlSwapCollateral({
  apiKey, walletAddress, sessionPrivateKey,
  fromToken: 'USDH', toToken: 'USDC', amount: '15',
});

Supported swap currencies: USDC ⇄ USDH / USDE / USDT0. MCP exposes this as the hl_swap_collateral tool with the same structured params.

Notes

• Coin format: orders take coin as "#<outcomeId><sideIndex>" — side 0 is the first sideSpecs entry (usually "Yes"), side 1 the second ("No"). Current prices are in the mids map returned by getHlOutcomes.
• Price is a probability in (0,1); size is contracts. HyperLiquid enforces its own minimum order value (~$10–11 notional).
• walletAddress is the control address used at sign-in (the same rule as perp trading); outcome balances/positions live under the managed address, so pass the managed address to getHlOutcomeAccount.
• Outcome markets settle through HyperLiquid spot collateral, separate from the perp engine. Funding an HL account (via gdex-perp-funding) and placing an outcome order can move USDC from the perp to the spot/outcomes balance; check both getHlAccountState (perp) and getHlSpotState (spot).
• MCP: the same flow is available via the hl_enable_trading, hl_create_outcome_order, hl_cancel_outcome_order, and hl_close_outcome_order tools with these structured params.