Transaction

[Error Code: 1101] cadence runtime error Execution failed:
error: underflow
  --> 28878ee1841aad2c55efc43e2205e4d23d5059da03510dfce5e3379af6a5978c:16:8
   |
16 |         let total: UFix64 = SwapConfig.ScaledUInt256ToUFix64(res) - 0.2
   |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^