Transaction

[Error Code: 1101] cadence runtime error Execution failed:
error: underflow
  --> aa0670993c6c6796638b6d62f2c1b6960c70713108aa4097b85a7669b2fc3562:16:8
   |
16 |         let total: UFix64 = SwapConfig.ScaledUInt256ToUFix64(res) - 0.2
   |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^