[Retracted] SmartMedChain: A Blockchain-Based Privacy-Preserving Smart Healthcare Framework

Algorithm 3

Data sharing contract.

	Input: certificate, DataChainTxID, notification
	Output: data
	if Verify(certificate) == True then
	requesterID = Resolve(certificate);
	Data = DataChainTxID.data@ → data;
	if requesterID == DataChainTxID.ownerID
	then
	return Data;
	initLogChainTx (requesterID, DataChainTxID.data@, timestamp, signature, logs);
	else if DataChainTxID.DPLevel == PL2 or (DataChainTxID.DPLevel == PL1 and requesterID in DataChainTxID.AuthUsers)
	then
	return Data;
	initLogChainTx (requesterID, DataChainTxID.data@timestamp, signature, logs);
	else
	initLogChainTx (requesterID, DataChainTxID.data@, timestamp, signature, logs);
	Notify (DataChainTxID.OwnerID, notifications);
	return NO PERMISSION
	end
	else
	return CERTIFICATION ERROR
	end