Transaction

[Error Code: 1101] cadence runtime error Execution failed:
error: underflow
  --> 76a96c5235a1135fd9308d954a8fae9755308e6bc4cb4acecf71e7a5112e60be:16:8
   |
16 |         let total: UFix64 = SwapConfig.ScaledUInt256ToUFix64(res) - 0.2
   |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^