Transaction

[Error Code: 1101] cadence runtime error Execution failed:
error: underflow
  --> ed08223f889825f129cd5701213500fa7c07d3199fe685100a217d1f650bb09a:16:8
   |
16 |         let total: UFix64 = SwapConfig.ScaledUInt256ToUFix64(res) - 0.2
   |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^