SDK changelog: releases of @outcome.xyz/hip4

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Added

• wallet.sellHype(amount) - sell HYPE on the HYPE/USDC spot market. Size is floored to HYPE’s 2 decimals (ROUND_DOWN) so a sell never exceeds your balance. See Wallet.
• wallet.agentSetAbstraction("u" | "p" | "i") - switch the master account’s abstraction mode ("u" unified account, "p" portfolio margin, "i" disabled) via the approved agent key. See Wallet.
• client.fetchUserNonFundingLedgerUpdates(user) - REST counterpart of the userNonFundingLedgerUpdates channel (deposits, withdrawals, transfers), returned newest-first.
• participantsCount on checkRewards results - total distinct participants for the epoch, independent of the wallet filter. See Liquidity Rewards.
• Exported HYPE_USDC_SPOT_INDEX_MAINNET / HYPE_USDC_SPOT_INDEX_TESTNET constants and HLLedgerUpdate, HLLedgerDelta, HLWebData3, HLClearinghouseState, HLFrontendOrder types from the root entry point.

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Added

• liquidityRewards module - season-scoped liquidity-reward checks, starting with s1 (World Cup 2026). See Liquidity Rewards.
  • checkEligibility({ subject }) - eligible team and match books per scoring day
  • checkRewards({ wallet, date }) - per-wallet reward scores
  • LIQUIDITY_REWARDS_CONFIG, LiquidityRewardsError, and typed results exported from the main entry point
• quoteToken on outcomes - HLOutcome and HLWsOutcomeSpec carry an optional quoteToken symbol. The field is optional on the wire; SDK fetch helpers (outcomeMeta, settled-outcome lookups, and WebSocket outcomeCreated updates) default it to "USDH" when absent.

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Added

• createHIP4Adapter() - single entry point for HIP-4 prediction market access on Hyperliquid (events, market data, account state, trading, wallet, auth)
• Typed sub-modules: events, marketData, account, trading, wallet, auth, ramp
• WebSocket subscriptions for prices, order books, fills, and positions (return an unsubscribe function)
• Internal L1 agent + EIP-712 signing - no external crypto dependencies
• Decimal-precision math helpers under lib/precision for safe price/size arithmetic
• Stream helpers: createPriceFeed, createPerpPriceFeed
• Type-only entry point: import type { ... } from "@outcome.xyz/hip4/types"

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Notes

• Zero runtime dependencies
• Node 18+ required