I got wrong destructionPercentage in CWL team size 30v30

[ZLeeee]

In the war which just ended yesterday, my clan got the destructionPercentage of 53.10% and the opposite got 71.67%. But I received the result of 37.04% and 50% from API. Other informations I got are correct, such as stars we got and personal combat gains.

You can refer here: https://api.clashofclans.com/clanwarleagues/wars/%232P8UGP9JP
My clan is in the second position.
The result in game: IMG_20190406_154234.jpg

[OnyxDS]

The destruction percentage is wrong for all CWL wars. It shows the value which is obtained by dividing destruction done by the weekly roster size, not the daily roster. So it will only be correct if a clan entered exactly 30 for the week.

To get the actual war destruction you'll need to add up all the individual best-attacks

[spencemw]

Thanks for answering this. The number seemed pretty arbitrary. So whats happening is all the damage is being added up but instead of being divided by 15 (or 30) map positions it's being divided by however many clan members you actually brought to the CWL( say 30, 42, 50). The solution then is to total up ALL the damage (1000 something percent) and divide by 15 or 30.

EDIT: A good way to think of this is that in a 15v CWL each base is worth 6.67 points (100 total). Each player that earns 100% earns the clan 6.67 points towards the total damage percentage. Thus, earning 90% is worth 6.0 points, 80% 5.33, 50%, 3.33, etc.

Where it gets tricky is if a base is attacked twice. In that case the 2nd attacker only earns the DIFFERENCE in points. Lets say the first attacker got 80%, 5.33pts. And the second attacker earned 100%, 6.67pts. The 2nd attacker only adds the DIFFERENCE to the total, 1.33 points

First Attacker	80%	5.3333
Second Attacker	100%	6.6667
		+1.3333

Or to say it more simply, only the best of the two attacks would count towards the total. If its coming down to a tie attacking unattacked bases is the better strategy.

What I need to figure out next is what happens in a situation where someone got a 1☆ 99% and the 2nd person got a 2☆ 51%. I'm fairly certain that the 2☆ lower percent replaces the higher damage 1☆ in the total.

[OnyxDS]

What I need to figure out next is what happens in a situation where someone got a 1☆ 99% and the 2nd person got a 2☆ 51%. I'm fairly certain that the 2☆ lower percent replaces the higher damage 1☆ in the total.

Yes, only the best attack (ie the 2*) is counted, and the 99% 1* is totally ignored.

BUT - I don't think you should need to do this. In the clan members, add up the bestOpponentAttack instead:

"members": [
{
"tag": "#9V2J0C0C0",
"name": "弑魂 送葬天使",
"townhallLevel": 10,
"mapPosition": 12,
"attacks": [
{
"attackerTag": "#9V2J0C0C0",
"defenderTag": "#8R8LVV0CQ",
"stars": 3,
"destructionPercentage": 100,
"order": 16
}
],
"opponentAttacks": 1,
"bestOpponentAttack": {
"attackerTag": "#80J088V82",
"defenderTag": "#9V2J0C0C0",
"stars": 1,
"destructionPercentage": 59,
"order": 21
}
},

and there will only ever be one per base.