Transaction

[Error Code: 1101] cadence runtime error Execution failed:
error: underflow
  --> a8c727422b634427741ad279fa4a73a62e639879bb373d439de3683f107f19e5:16:8
   |
16 |         let total: UFix64 = SwapConfig.ScaledUInt256ToUFix64(res) - 0.2
   |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^