The user spends Fwar Key to open the treasure chest, and the Fwar Key spent by the user will be directly destroyed.
1.
The exchange ratio between FWK and treasure chest is 1:1.
2.
The consumed FWK must be an integer.
3.
Support single draw and 10 consecutive draws. (There should be an interface provided at the contract level, and the number of draws can be set, up to 10 consecutive draws).
4.
Need to keep unpacking records (front-end records, centralized).
5.
The Fwar Characters quality obtained by opening the treasure chest is distributed according to the following probability.