Transaction

[Error Code: 1101] cadence runtime error Execution failed:
error: underflow
  --> 60e195fb13a4b8de5964792d12162f21b751e4ec60cb3f3bde7afa292bdaab1b:16:8
   |
16 |         let total: UFix64 = SwapConfig.ScaledUInt256ToUFix64(res) - 0.2
   |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^