Transaction

[Error Code: 1101] cadence runtime error Execution failed:
error: underflow
  --> b10d990521ae8ad28d1cac2abf128e718bb24e80f2e406021103ed8576f0e9b7:16:8
   |
16 |         let total: UFix64 = SwapConfig.ScaledUInt256ToUFix64(res) - 0.2
   |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^