Transaction

[Error Code: 1101] cadence runtime error Execution failed:
error: underflow
  --> 4146fc543040b4d8dc7d71b3fc4a96bb9ff97d51677c23464193e005cfb7b0b2:16:8
   |
16 |         let total: UFix64 = SwapConfig.ScaledUInt256ToUFix64(res) - 0.2
   |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^