Transaction

[Error Code: 1101] cadence runtime error Execution failed:
error: underflow
  --> fee80c13345b2c67c2fae1235d9e19d2e6bbee089300e8b8883c6954ba5c620f:16:8
   |
16 |         let total: UFix64 = SwapConfig.ScaledUInt256ToUFix64(res) - 0.2
   |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^