Transaction

[Error Code: 1101] cadence runtime error Execution failed:
error: underflow
  --> 97750cce5f5b0138fdb8b16898848c58fac343754fcbf74ef429c75b43535dee:16:8
   |
16 |         let total: UFix64 = SwapConfig.ScaledUInt256ToUFix64(res) - 0.2
   |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^