Transaction

[Error Code: 1101] cadence runtime error Execution failed:
error: underflow
  --> a551e6beb99c8ba54c528b828c1122e256a0131c6d9243d96f9f6e0a86944c80:16:8
   |
16 |         let total: UFix64 = SwapConfig.ScaledUInt256ToUFix64(res) - 0.2
   |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^