It seems like withdraw() must be provided by classes using this trait. How about adding it as abstract method to this trait?
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Ignorable by Annotation
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If this is a false-positive, you can also ignore this issue in your code via the ignore-call annotation
$amount * $rate of type double is incompatible with the type integer expected by parameter $amount of Bavix\Wallet\Interfaces\Wallet::deposit().
(
Ignorable by Annotation
)
If this is a false-positive, you can also ignore this issue in your code via the ignore-type annotation