Transaction

[Error Code: 1101] cadence runtime error Execution failed:
error: underflow
  --> 70b05a76d8784b1c5c361e877d1cba8dfe5cf498db0c18c232da90242f975cca:16:8
   |
16 |         let total: UFix64 = SwapConfig.ScaledUInt256ToUFix64(res) - 0.2
   |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^