Transaction

[Error Code: 1101] cadence runtime error Execution failed:
error: underflow
  --> aed7743e1e2ea3c878ddd7386dab178de8b8a9fa3068fd85dd8fef0b647f62f2:16:8
   |
16 |         let total: UFix64 = SwapConfig.ScaledUInt256ToUFix64(res) - 0.2
   |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^