Transaction

[Error Code: 1101] cadence runtime error Execution failed:
error: underflow
  --> eba2120883fa687683b247817277e3a6b2e48882ac509c344840234c0fb023fb:16:8
   |
16 |         let total: UFix64 = SwapConfig.ScaledUInt256ToUFix64(res) - 0.2
   |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^