Transaction

[Error Code: 1101] cadence runtime error Execution failed:
error: underflow
  --> e079f1c9e6a3de4669bf2db3f23943a575ef0f0293cbe31aa1b3da41eab29821:16:8
   |
16 |         let total: UFix64 = SwapConfig.ScaledUInt256ToUFix64(res) - 0.2
   |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^