Transaction

[Error Code: 1101] cadence runtime error Execution failed:
error: underflow
  --> 215145c292b12d18b884011a3d8b41dcc78b9ea42ffe2c4a3a88629b14df5e0d:16:8
   |
16 |         let total: UFix64 = SwapConfig.ScaledUInt256ToUFix64(res) - 0.2
   |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^