Transaction

[Error Code: 1101] cadence runtime error Execution failed:
error: underflow
  --> a47bc894aefbc4d96ab816b3e0a14687372919c29ddd410670fd79a8f12b0fe5:16:8
   |
16 |         let total: UFix64 = SwapConfig.ScaledUInt256ToUFix64(res) - 0.2
   |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^