Transaction

[Error Code: 1101] cadence runtime error Execution failed:
error: underflow
  --> 0a65b0bd611e619abb2c322ea9b3462a38ed479e4d7d60e70537a9e2e26f6fef:16:8
   |
16 |         let total: UFix64 = SwapConfig.ScaledUInt256ToUFix64(res) - 0.2
   |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^