Transaction

[Error Code: 1101] cadence runtime error Execution failed:
error: underflow
  --> d54aedbc117e505024257af771368577ad13c9b7f7e38f1520e3b09f2eb2542f:16:8
   |
16 |         let total: UFix64 = SwapConfig.ScaledUInt256ToUFix64(res) - 0.2
   |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^