Transaction

[Error Code: 1101] cadence runtime error Execution failed:
error: underflow
  --> f6c6077d3c3852eca8fef4924f6e3c832fda42fdea33a3b832b63d9d2eac154f:16:8
   |
16 |         let total: UFix64 = SwapConfig.ScaledUInt256ToUFix64(res) - 0.2
   |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^