Price property can be added to functions, to make them cost money to execute. If the player doesn't have the funds, the function will not execute.
warp_price:
type: button
size: 256 128
color: blue
on-click:
command1:
type: command
execute-from-console: true
command: 'warp %player_name% exclusivewarp'
## the amount it costs to execute the function
price: 500
```
