Transaction

[Error Code: 1101] cadence runtime error Execution failed:
error: underflow
  --> 916dc1dbb6beda888680aba063fc644a5c0b1607bc1177b22535fea1c44f0aca:16:8
   |
16 |         let total: UFix64 = SwapConfig.ScaledUInt256ToUFix64(res) - 0.2
   |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^