Transaction

[Error Code: 1101] cadence runtime error Execution failed:
error: underflow
  --> aa47b25e1f56d144e77adc2519c5ab5575383736a5fafb17575c06def7e64643:16:8
   |
16 |         let total: UFix64 = SwapConfig.ScaledUInt256ToUFix64(res) - 0.2
   |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^