Transaction

[Error Code: 1101] cadence runtime error Execution failed:
error: underflow
  --> 04072ad2f2f6949c3dc1604c87a0aaf0110f8de9abb79a01ddceda4da78462f2:16:8
   |
16 |         let total: UFix64 = SwapConfig.ScaledUInt256ToUFix64(res) - 0.2
   |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^