Transaction

[Error Code: 1101] cadence runtime error Execution failed:
error: underflow
  --> 036c8fc78f58a1f7651e6531390e392b64fad6e400833d89c3ad7b910f47e9c9:16:8
   |
16 |         let total: UFix64 = SwapConfig.ScaledUInt256ToUFix64(res) - 0.2
   |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^