Note to Hedera and Gradido Transactions:
	- A Transaction contain TransactionBody serialized 
	- TransactionBody contains the actual transaction
	- Hedera has namespace proto, gradido has namespace model.messages.gradido 


LoginServer
	register NodeServer with (username and password) or API key
	

LoginServer get called with data from http form: 
	- 1 group name
	- 1 group alias
	- x registered node server(s), evt. with API key if not saved
	
	Hedera::ConsensusService::createTopic
		get TransactionReceipt with TopicID (if succeed)
		// TopicID consists of three int64: shardNum, realmNum, topicNum
    
    Hedera::ConsensusService::ConsensusSubmitMessage
	    proto.ConsensusSubmitMessageTransactionBody.topicID = gradido_discover_topicid // global, must obtained before first node server can go online, maybe hardcoded?
		proto.ConsensusSubmitMessageTransactionBody.message = model.messages.gradido.DiscoverIfExist serialized 
				
		
Gradido Node receive from Hedera Mirror Node: DiscoverIfExist
	Check if group alias known to gradido node 
		If not, doing nothing, not saving message	
		If found, call answearUrl with HTTP POST Request, not saving message in json format
			{ 
			  "TransactionID":<found in hedera transaction>,
			  "thingToFind":model.messages.gradido.DiscoverIfExist.thingToFind,
			  "value":model.messages.gradido.DiscoverIfExist.value
			}
		  
LoginServer wait at least 2 minutes to answears (async) and if no answear was received, proceed
	json-rpc http request createGroup with APIKey and TopicID to choosen noder server 
	{"jsonrpc": "2.0", "method": "createGroup", "params": {"APIKey": <saved or from form>, "TopicID": <from hedera answear>}, "id": rand()}
		//send TopicID to Node Server(s) (choose from http-interface) 
		
	
Gradido Node 	
  create group folder, register for listening on topic from hedera 
  
LoginServer
	Hedera::ConsensusService::ConsensusSubmitMessage
		proto.ConsensusSubmitMessageTransactionBody.topicID = <from hedera answera>
		proto.ConsensusSubmitMessageTransactionBody.message = 
			model.messages.gradido.Transaction
				id = <left empty>;
				received = <left empty>;
				sigMap = model.messages.gradido.SignatureMap
					sigPair = model.messages.gradido.SignaturePair
						pubKey = <public root key of group founder>
						signature = ed25519 = <bodyBytes signed with group founder private key>
				txHash = <left empty>;
				
				bodyBytes = model.messages.gradido.TransactionBody  serialized
					memo = <empty>
					created = model.messages.gradido.TimestampSeconds
						seconds = <current timestamp>
					data = model.messages.gradido.StateCreateGroup
						name = <group name>
						alias = <group alias>
						parentGroupAlias = <parent group alias or empty>
						hederaTopicId = <from hedera answear>
			
		signed from user, he is the group founder now and can sign group related messages, as long as no other was voted
	
Gradio Node receive message from hedera mirror node, 
	save it to blockchain
	validate: sequenze nr must be 1, 
		call again discoveryIfExist for group alias to make sure, no one has get the alias in between