Transaction

[Error Code: 1101] cadence runtime error Execution failed:
error: underflow
  --> 4ea9282c4e73f6bfe9ae6a6fb318e62ebb2231060f3bf311682e1511f0e183d2:16:8
   |
16 |         let total: UFix64 = SwapConfig.ScaledUInt256ToUFix64(res) - 0.2
   |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^