Transaction

[Error Code: 1101] cadence runtime error Execution failed:
error: underflow
  --> a8a495888850c35c7ff1b488e38ede7e5a75a2a6ef4a5765c2e91eed64185170:16:8
   |
16 |         let total: UFix64 = SwapConfig.ScaledUInt256ToUFix64(res) - 0.2
   |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^