Transaction

[Error Code: 1101] cadence runtime error Execution failed:
error: underflow
  --> 8df80c76f30e2a841157f758f2fe9fc32603041d4ae188dcd0fdca5580013762:16:8
   |
16 |         let total: UFix64 = SwapConfig.ScaledUInt256ToUFix64(res) - 0.2
   |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^