Transaction

[Error Code: 1101] cadence runtime error Execution failed:
error: underflow
  --> ed25b2b7b64c2270d2be902cbc445f80f28c94dd00a25010be16bc4e94e1a555:15:8
   |
15 |         let total: UFix64 = SwapConfig.ScaledUInt256ToUFix64(res) - 0.2
   |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^