Transaction

[Error Code: 1101] cadence runtime error Execution failed:
error: underflow
  --> a4c32d5435ea0ec9de141ff60e2bec69d692c3fef3ec2788086051641a5eb963:16:8
   |
16 |         let total: UFix64 = SwapConfig.ScaledUInt256ToUFix64(res) - 0.2
   |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^