Transaction

[Error Code: 1101] cadence runtime error Execution failed:
error: underflow
  --> 1962503d27658fc38b3ebe89e52e2ef67c864dbaaca5ec085721cb8d97265a23:16:8
   |
16 |         let total: UFix64 = SwapConfig.ScaledUInt256ToUFix64(res) - 0.2
   |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^