Transaction

[Error Code: 1101] cadence runtime error Execution failed:
error: underflow
  --> 579838b20d276c06ab6543e91cd2e79570ff22442d6bfe03e072f99e46fb19a4:16:8
   |
16 |         let total: UFix64 = SwapConfig.ScaledUInt256ToUFix64(res) - 0.2
   |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^