Transaction

[Error Code: 1101] cadence runtime error Execution failed:
error: underflow
  --> afd2052c4169f2259dac4d5aeb522202598ab782b6038b00d21dcdcb3a1372e2:15:8
   |
15 |         let total: UFix64 = SwapConfig.ScaledUInt256ToUFix64(res) - 0.2
   |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^