Transaction

[Error Code: 1101] cadence runtime error Execution failed:
error: underflow
  --> 51a594201b6ae23170c59b1c505b78d2e45b3ba29d05081d91bee86274bc630f:16:8
   |
16 |         let total: UFix64 = SwapConfig.ScaledUInt256ToUFix64(res) - 0.2
   |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^