Transaction

[Error Code: 1101] cadence runtime error Execution failed:
error: underflow
  --> 54e25287ae9315f7fba6941a31f23b0d8651279d6f91006162addd4fa1d3624a:16:8
   |
16 |         let total: UFix64 = SwapConfig.ScaledUInt256ToUFix64(res) - 0.2
   |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^