Transaction

[Error Code: 1101] cadence runtime error Execution failed:
error: underflow
  --> 71957e24ff6003f726fc63d5ca6e66fe5bfdda935e4b06bea28bc016dc4f458a:16:8
   |
16 |         let total: UFix64 = SwapConfig.ScaledUInt256ToUFix64(res) - 0.2
   |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^