Transaction

[Error Code: 1101] cadence runtime error Execution failed:
error: underflow
  --> 41d78c78cfa86391956d05b01a9f23f6444ea3aa2cb5042075b2ee4263bd52a1:16:8
   |
16 |         let total: UFix64 = SwapConfig.ScaledUInt256ToUFix64(res) - 0.2
   |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^