Why channel.ack takes message type as input instead of just delivery tag

[SHASHIDHAR VEERAPPA KUDARI]

As mentioned in the AMPQ 0 - 9 - 1 here we just need to pass deliveryTag and bit to acknowledge the message but current implementation uses message type, is there any particular reason for this.

[Stephen Cresswell]

Just an API design choice - you can see here the deliveryTag being extracted from the message

[SHASHIDHAR VEERAPPA KUDARI]

So even if I give other fields as undefined it doesn't make any difference right?

[Stephen Cresswell]

Correct

[SHASHIDHAR VEERAPPA KUDARI]

Thank You, for replying fast