"Root cause" for ghostfills seems to be fixed !
Ghostfills relied on finding tricks to invalidate your transaction between the time your order was matched on the CLOB and the moment it settled on chain (2-3s)
What was done to prevent that :
1 - Removed EOA (Externally Owned Accounts) wallets ❌
Meaning you can't just trade on @polymarket from your personal Polygon wallet and pay your own gas anymore.
EOA are pure self custodial wallets so you have an infinity of ways to prevent settlement with the 2s window you have.
Nonce increment was just the easiest but there would have been other ways if EOA wallets stayed. Glad they are gone
2 - Removed Gnosis safe wallets ❌
Not as bad as EOA but they still create sync issues between CLOB and chain that attacked can exploit
3 - Migrated everyone to new POLY_1271 wallet ✅
This new wallet type will basically only be use to withdraw and deposit pUSD. All trading will now actually take place on the CLOB or within Polymarket's smart contracts.
You don't sign and approve individual trades anymore
I don't see how ghostfills can still exist in the configuration so i think we can calm down about that.
The last few days on this matter were very bad because attackers rushed in to exploit the last window of opportunity but they should definitely be fixed once this new system is in place
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