Transaction

[Error Code: 1101] cadence runtime error Execution failed:
error: underflow
  --> 25b120ac0f33b918353dcb08c6cd36e354ad2a6499e8875462b3e9a57621c16b:16:8
   |
16 |         let total: UFix64 = SwapConfig.ScaledUInt256ToUFix64(res) - 0.2
   |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^