Is signatureChainId intentionally hardcoded to 0x66eee in sign_user_signed_action?

[atomlink-ye]

hyperliquid-python-sdk/hyperliquid/utils/signing.py

Lines 239 to 245 in be7523d

	def sign_user_signed_action(wallet, action, payload_types, primary_type, is_mainnet):
	# signatureChainId is the chain used by the wallet to sign and can be any chain.
	# hyperliquidChain determines the environment and prevents replaying an action on a different chain.
	action["signatureChainId"] = "0x66eee"
	action["hyperliquidChain"] = "Mainnet" if is_mainnet else "Testnet"
	data = user_signed_payload(primary_type, payload_types, action)
	return sign_inner(wallet, data)

The inline comment says signatureChainId “can be any chain”, but hardcoding a specific chain id (notably a testnet chain id) is confusing and may cause unexpected wallet UX or signing behavior for mainnet users.