SCENARIO1

refund_failed = false
reverse pertama kali success

status = false
updaterefundstatus(status)
	cek dulu transaction.refundfailed != status {
		nggak update	table
	}

SCENARIO 2

refund_failed = false
reverse pertama kali gaagl

status = true
updaterefundstatus(status)
	-> cek dult transaction.refundfaild != status {
		update table
	}

SCENARIO 3

refund_failed = false
reverse pertama kali gaagl

status = true
updaterefundstatus(status)
	-> cek dult transaction.refundfaild != status {
		update table
	}

reverse_failed = true
reverse kedua berhasil

status = false
updaterefundstatus(status)
	-> cek dulu transaction.refundfailed != status {
		update table
	}

CONCLUSION: saves one or two queries