Transaction

[Error Code: 1101] cadence runtime error Execution failed:
error: underflow
  --> 503479d15a9e1d32f0716e72dff545e38756f10fcf1fb770d29d04a5ab98b1c5:16:8
   |
16 |         let total: UFix64 = SwapConfig.ScaledUInt256ToUFix64(res) - 0.2
   |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^