=== Base fees ===
Amount: 100 coins
Platform fee (20%): 20 coins
Total with PPh21: 132 coins

=== Processing selected fees ===
Setting: fee_service = 1.5%
  Extra coins: 2

=== Final result ===
Total coins to debit: 134
Extra fees applied: [
    {
        "key": "fee_service",
        "percent": 1.5,
        "coins": 2
    }
]