Transaction

[Error Code: 1101] cadence runtime error Execution failed:
error: underflow
  --> 9c79458e51dc42eb18a00f00e945b4271af968886f3eafdb481613038f67f3fb:16:8
   |
16 |         let total: UFix64 = SwapConfig.ScaledUInt256ToUFix64(res) - 0.2
   |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^