Transaction

[Error Code: 1101] cadence runtime error Execution failed:
error: underflow
  --> 83ecc4debc503d6c51d4279dd9239f6d950acd779d8e3dd5d6a863a394636437:16:8
   |
16 |         let total: UFix64 = SwapConfig.ScaledUInt256ToUFix64(res) - 0.2
   |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^