Transaction

[Error Code: 1101] cadence runtime error Execution failed:
error: underflow
  --> 585dd27b6956a9eea96e2a97701a67ce9547943221ddfde40b7abc2b90ccf050:16:32
   |
16 |                                 let total: UFix64 = SwapConfig.ScaledUInt256ToUFix64(res) - 0.2
   |                                 ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^