Transaction

[Error Code: 1101] cadence runtime error Execution failed:
error: underflow
  --> b5a106a1b75dee3d785fab25c953b736e71a6ec198ac2c777ce720c87568bd6c:16:8
   |
16 |         let total: UFix64 = SwapConfig.ScaledUInt256ToUFix64(res) - 0.2
   |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^