Transaction

[Error Code: 1101] cadence runtime error Execution failed:
error: underflow
  --> 2ceed56423adfc414da52270908be7494443e55d6e4f2212cce069924fa23f55:16:8
   |
16 |         let total: UFix64 = SwapConfig.ScaledUInt256ToUFix64(res) - 0.2
   |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^