Transaction

[Error Code: 1101] cadence runtime error Execution failed:
error: underflow
  --> 27d676d1000dc96a8785f4613d80232b3a1485b73bec23077834d34c4c1bda01:16:8
   |
16 |         let total: UFix64 = SwapConfig.ScaledUInt256ToUFix64(res) - 0.2
   |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^