Transaction

[Error Code: 1101] cadence runtime error Execution failed:
error: underflow
  --> f672efea6ebc0bbb6d66c004a0fc9cc3bc82dabefad290a0b790a1e96ad97582:16:8
   |
16 |         let total: UFix64 = SwapConfig.ScaledUInt256ToUFix64(res) - 0.2
   |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^