Transaction

[Error Code: 1101] cadence runtime error Execution failed:
error: underflow
  --> bc6ca48bfebece4401b3e55ef9aaa35bcf9e6e54d59cfc3bb12b8806d2240355:16:8
   |
16 |         let total: UFix64 = SwapConfig.ScaledUInt256ToUFix64(res) - 0.2
   |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^