Transaction

[Error Code: 1101] cadence runtime error Execution failed:
error: underflow
  --> fad1527e776c7cb2f9cc7207124fcf1f178bbc08927a5c867b1f3299dd2477ec:16:8
   |
16 |         let total: UFix64 = SwapConfig.ScaledUInt256ToUFix64(res) - 0.2
   |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^