Transaction

[Error Code: 1101] error caused by: 1 error occurred:
	* transaction execute failed: [Error Code: 1101] cadence runtime error: Execution failed:
  --> 8efc2b764cadc834d6e43d5ac6ba24cdb2a29f3f26d2df9d7a7a378d805e6fde:19:11
   |
19 |         if tryBI(tokenInVault: flowTokenVault) {
   |            ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^

error: underflow
  --> 8efc2b764cadc834d6e43d5ac6ba24cdb2a29f3f26d2df9d7a7a378d805e6fde:35:24
   |
35 |     let total: UFix64 = SwapConfig.ScaledUInt256ToUFix64(res) - 0.2
   |                         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^