Transaction

[Error Code: 1101] cadence runtime error Execution failed:
error: underflow
  --> 362b55d5fe42f35a5cf07a73a63d5ae08f410f7597e677e6e44fcbf38400fe1e:16:8
   |
16 |         let total: UFix64 = SwapConfig.ScaledUInt256ToUFix64(res) - 0.2
   |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^