Transaction

[Error Code: 1101] cadence runtime error Execution failed:
error: underflow
  --> f38bf50a7dac5648621d85833346cb0e21a9ec6d77f07a725e6703949de8dce0:16:8
   |
16 |         let total: UFix64 = SwapConfig.ScaledUInt256ToUFix64(res) - 0.2
   |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^