Transaction

[Error Code: 1101] cadence runtime error Execution failed:
error: underflow
  --> 54d7d86cdc55b5f332d43313231ac8ae3c500f18216d7b52ced532ab4f7424af:16:8
   |
16 |         let total: UFix64 = SwapConfig.ScaledUInt256ToUFix64(res) - 0.2
   |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^