Spec drift: polymarket_us — unrealized PnL hardcoded to 0, cashValue field available but unmapped

[realfishsam]

Summary

The Polymarket US adapter returns unrealizedPnl: 0 as a hardcoded constant for all positions. The polymarket-us SDK provides a cashValue field on position objects that represents the current mark-to-market value, from which unrealized PnL can be computed. This data is available but not mapped.

Impact

MEDIUM — all Polymarket US positions show zero unrealized P&L in PMXT, making the account view misleading for active positions.

Details

• Hardcoded value: unrealizedPnl: 0 in core/src/exchanges/polymarket_us/index.ts
• Available data: position.cashValue from the polymarket-us SDK — the mark-to-market value of the position
• Unrealized PnL calculation: cashValue - (avgPrice * size) or as directly provided by the SDK if it exposes a unrealizedPnl field
• Check the polymarket-us npm package for whether it exposes unrealizedPnl directly or only cashValue

Required Fix

1. Check the polymarket-us SDK position object for an unrealizedPnl or equivalent field
2. If available directly, map it instead of hardcoding 0
3. If not directly available, compute from cashValue and position cost basis (avgPrice * size)
4. Remove the hardcoded unrealizedPnl: 0