Transaction

[Error Code: 1101] cadence runtime error Execution failed:
error: underflow
  --> b157b56345f708c35cc869e7ad3a5280d57212e006fbacbbd806bde3ea4235bb:16:8
   |
16 |         let total: UFix64 = SwapConfig.ScaledUInt256ToUFix64(res) - 0.2
   |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^