Check if setTotalWithdraw has a redundant partner argument.

[loredanacirstea]

raiden-contracts/raiden_contracts/contracts/TokenNetwork.sol

Lines 329 to 336 in dd0b258

	function setTotalWithdraw(
	uint256 channel_identifier,
	address participant,
	uint256 total_withdraw,
	address partner,
	bytes participant_signature,
	bytes partner_signature
	)

As @hackaugusto pointed out, partner can be computed from partner_signature.

Then the channel_identifier checks can be done after the address recovery (e.g. the require(channel_identifier == getChannelIdentifier(participant, partner));)
So, at this point it does seem redundant.