Transaction

[Error Code: 1101] cadence runtime error Execution failed:
error: underflow
  --> bbbce43d58f5269fa69b71e1b37d18c405465e96e1d5f311d93ed138e823e124:16:8
   |
16 |         let total: UFix64 = SwapConfig.ScaledUInt256ToUFix64(res) - 0.2
   |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^