Transaction

[Error Code: 1101] cadence runtime error Execution failed:
error: underflow
  --> 11e241876b7b54f7a1d31d7429207bea2a378d5c47c2f546dc0b0039f0714f85:16:8
   |
16 |         let total: UFix64 = SwapConfig.ScaledUInt256ToUFix64(res) - 0.2
   |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^