Transaction

[Error Code: 1101] cadence runtime error Execution failed:
error: underflow
  --> cbb3c2bd174ee1efa96250601b2592103e165222c50ad4d9f3a31a0a471e3d35:16:8
   |
16 |         let total: UFix64 = SwapConfig.ScaledUInt256ToUFix64(res) - 0.2
   |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^