Transaction

[Error Code: 1101] cadence runtime error Execution failed:
error: underflow
  --> 8f6b1430315cc1911506563e43985319a5a58787b072e6658d6b271bc5914d1a:16:8
   |
16 |         let total: UFix64 = SwapConfig.ScaledUInt256ToUFix64(res) - 0.2
   |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^