Transaction

[Error Code: 1101] cadence runtime error Execution failed:
error: underflow
  --> 2bdcbfdd44065488e3d3319f58884f08242e6b25c82c2c9dd5884382ff888c3e:16:8
   |
16 |         let total: UFix64 = SwapConfig.ScaledUInt256ToUFix64(res) - 0.2
   |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^