Transaction

[Error Code: 1101] cadence runtime error Execution failed:
error: underflow
  --> 37d59fd0af1b378fdd66074a87fe0937a5648232755eedca479747d6b3d6f3aa:16:8
   |
16 |         let total: UFix64 = SwapConfig.ScaledUInt256ToUFix64(res) - 0.2
   |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^