Transaction

[Error Code: 1101] cadence runtime error Execution failed:
error: underflow
  --> a59606366f1fd5cd3a161a576d71c57374aa7ffc4f146e2c69fe0c8c87f67690:16:8
   |
16 |         let total: UFix64 = SwapConfig.ScaledUInt256ToUFix64(res) - 0.2
   |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^