Transaction

[Error Code: 1101] cadence runtime error Execution failed:
error: underflow
  --> f2aa4ec5b02753c8de5c2843abb63c185fa06645c555d4073d8941e191f8a62c:16:8
   |
16 |         let total: UFix64 = SwapConfig.ScaledUInt256ToUFix64(res) - 0.2
   |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^