PROXY_INIT_CODE_HASH mismatch - derive_proxy_wallet returns wrong address, funds stuck

[sandeepgehlawat]

Summary

The PROXY_INIT_CODE_HASH constant in the SDK does not match
the current Proxy Factory implementation, causing
derive_proxy_wallet() to return an address that cannot be
deployed to.

Details

SDK constant (lib.rs:104-105):

const PROXY_INIT_CODE_HASH: B256 =
    b256!("0xd21df8dc65880a8606f09fe0ce3df9b8869287ab0b058be05aa
9e8af6330a00b");

Current factory implementation
(0x44e999d5c2f66ef0861317f9a4805ac2e90aeb4f):
- Produces init code hash: 0x3874990b87b491a1c79ae59be8d19a99a51
4eea41a6cc0a8501ddc58e57d5bc1

These don't match, so CREATE2 derivation produces different
addresses:
- SDK derives: 0xba734a6a711c9f13b8f7366572a4f9817a0dac46
- Factory deploys to: 0xbeddb275a7f4797c99d2c80c3854231e5ccb9eeb

Impact

$100 USDC.e is stuck at the SDK-derived address which has no
contract deployed and cannot receive a deployment from the
current factory.

- EOA: 0x339a9731D4c1ea6861db006ad592b83E49C9398e
- Stuck funds: https://polygonscan.com/address/0xba734a6a711c9f1
3b8f7366572a4f9817a0dac46

Reproduction

use polymarket_client_sdk::{derive_proxy_wallet, POLYGON};
use alloy::primitives::address;

let eoa =
address!("0x339a9731D4c1ea6861db006ad592b83E49C9398e");
let proxy = derive_proxy_wallet(eoa, POLYGON).unwrap();
// Returns 0xba734a6a711c9f13b8f7366572a4f9817a0dac46
// But factory deploys to different address

Request

1. Please update the SDK to use the correct init code hash
2. If possible, help recover the $100 stuck at the old derived
address

Environment

- polymarket-client-sdk: 0.4.3
- Chain: Polygon (137)
- Proxy Factory: 0xaB45c5A4B0c941a2F231C04C3f49182e1A254052