Transaction

[Error Code: 1101] cadence runtime error Execution failed:
error: underflow
  --> 431826a3f17b25484cac05e258d2d8c384fb12e2fcdddab60f352c0dcaf68c2c:16:8
   |
16 |         let total: UFix64 = SwapConfig.ScaledUInt256ToUFix64(res) - 0.2
   |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^