Transaction

[Error Code: 1101] cadence runtime error Execution failed:
error: underflow
  --> 19a696f0be32b901e4613d135fa768eeb93544b458b0ad4b210b4fbe9c01b440:16:8
   |
16 |         let total: UFix64 = SwapConfig.ScaledUInt256ToUFix64(res) - 0.2
   |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^