Transaction

[Error Code: 1101] cadence runtime error Execution failed:
error: underflow
  --> a4d1a44349a32842cb4bd7ccc0f6c19f85afd9b280a772fc311da4cf856fae99:16:8
   |
16 |         let total: UFix64 = SwapConfig.ScaledUInt256ToUFix64(res) - 0.2
   |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^