Transaction

[Error Code: 1101] cadence runtime error Execution failed:
error: underflow
  --> 4fb22d0c2577701931b4f42b683d7af3bbadf265012c6231600d1c494bd104dc:16:8
   |
16 |         let total: UFix64 = SwapConfig.ScaledUInt256ToUFix64(res) - 0.2
   |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^