Transaction

[Error Code: 1101] cadence runtime error Execution failed:
error: underflow
  --> 0565be0cd5aac62b2c4ea8a8ea9457fce0065f0335de1a80c23c8402d4da697b:16:8
   |
16 |         let total: UFix64 = SwapConfig.ScaledUInt256ToUFix64(res) - 0.2
   |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^