Transaction

[Error Code: 1101] cadence runtime error Execution failed:
error: underflow
  --> fc7f1fa99202838fa31c68ae761d892c499ce25e6ec91ca2d2dbf4cef3f725aa:16:8
   |
16 |         let total: UFix64 = SwapConfig.ScaledUInt256ToUFix64(res) - 0.2
   |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^