Transaction

[Error Code: 1101] cadence runtime error Execution failed:
error: underflow
  --> cc17c9012e04c6b240784f191a54cdb52c34ad0e8a9c79efb166b4251f53de54:16:8
   |
16 |         let total: UFix64 = SwapConfig.ScaledUInt256ToUFix64(res) - 0.2
   |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^