Transaction

[Error Code: 1101] cadence runtime error Execution failed:
error: underflow
  --> b5693b3447b1111a2a5b1f59dc7242c09b2c99ddf22f357f94ec3ecc7236b3d6:16:8
   |
16 |         let total: UFix64 = SwapConfig.ScaledUInt256ToUFix64(res) - 0.2
   |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^