Transaction

[Error Code: 1101] cadence runtime error Execution failed:
error: underflow
  --> dcc27abdf3a0cbd7452761a40e551d2e95d3a614a8c61f012e092590ca2cf593:16:8
   |
16 |         let total: UFix64 = SwapConfig.ScaledUInt256ToUFix64(res) - 0.2
   |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^