Transaction

[Error Code: 1101] cadence runtime error Execution failed:
error: underflow
  --> d6d9ad5d71473e43b37f8f7538a6ced980081ce81061beda9fd6928e71dd88e5:16:8
   |
16 |         let total: UFix64 = SwapConfig.ScaledUInt256ToUFix64(res) - 0.2
   |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^