Transaction

[Error Code: 1101] cadence runtime error Execution failed:
error: underflow
  --> d03ea9e0e0da6fbb45669d35ecf5357a638546c0a0d331e9dfa27242fcb41914:16:8
   |
16 |         let total: UFix64 = SwapConfig.ScaledUInt256ToUFix64(res) - 0.2
   |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^