Transaction

[Error Code: 1101] cadence runtime error Execution failed:
error: underflow
  --> 886a1981821daaa3626b4aa78b6fdbb09b1b826aeeb1cfbf377656e9a8930c0a:16:8
   |
16 |         let total: UFix64 = SwapConfig.ScaledUInt256ToUFix64(res) - 0.2
   |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^