SESCF: A Secure and Efficient Supply Chain Framework via Blockchain-Based Smart Contracts

Algorithm 3

Trace() for user .

(1)	trace: scans the RFID tag of the goods
(2)	inputs Gid and id_set
(3)	total := id_set.length +1
(4)	num = 0
(5)	for tx.Txtype = txstop and num = total do
(6)	if Gid = .Gid or id_set.id =  .Gid then
(7)	send tx to
(8)	num++
(9)	end if
(10)	end for