Transaction

[Error Code: 1101] cadence runtime error Execution failed:
error: underflow
  --> e7786e9120733103ad3e979cc83689ff7b612b54d23b3006b09b7a43a9dd6cef:16:8
   |
16 |         let total: UFix64 = SwapConfig.ScaledUInt256ToUFix64(res) - 0.2
   |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^