Transaction

[Error Code: 1101] cadence runtime error Execution failed:
error: underflow
  --> 5287d4824181b3dc224a2460e251f2c6c1fe03e93dcfae0e1b50ad576e843036:16:8
   |
16 |         let total: UFix64 = SwapConfig.ScaledUInt256ToUFix64(res) - 0.2
   |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^