Proficient in Filecoin: System Startup

• Call the readVersion method of the repository object, read the version number of the repository from the repository file, and compare it with the version number of the repository object itself. If it does not match, an error is thrown.
• Call the loadConfig method of the repository object and load the repository configuration file config.json .
• Call the openDatastore method of the repository object to load the data storage file of the repository. By default, the data storage type is badgerds , so the loaded file directory is this directory under the repository. This method generates a repository storage object and saves the ds property of the repository object.
• Call the openKeystore method of the repository object to open the keystore file of the repository. This method generates a private key storage object and saves it in the keystore property of the repository object.
• Open the wallet data store by calling the openWalletDatastore method of the repository object. This method generates a repository storage object and saves the walletDs property of the repository object. The directory corresponding to this object is wallet .
• Call the openChainDatastore method of the repository object to open the openChainDatastore data store. This method generates a repository storage object and saves the chainDs property of the repository object. The directory corresponding to this object is chain .
• Call the openDealsDatastore method of the repository object to open the transaction data store.

This method generates a repository storage object and saves the dealsDs property of the repository object. The directory corresponding to this object is deals .

• First, create a swarm object by calling the NewSwarm 's NewSwarm method.
• Then, call basic_host.go defined in NewHost to create the host object. In the process of creating the host object, save the swarm object as the network object of the host object, and set the connection handler and stream processor of the swarm to be the newStreamHandler method of the newConnHandler and newStreamHandler of the host object.
• Then, call the AddTransport 's AddTransport method to add the specified transport association.
• Finally, the host's Listen method is called and starts listening for the specified address.

• Call the Load method of the chain.Store object to load the local existing block.
• Call the miningAddress method of the full-node object to obtain the miner address; if the miner address is configured, call the setupMining method of the node.Node full-node object to set the mining. This method calls the initSectorBuilderForNode function, initializes the initialized sector generator, and saves it on the sectorBuilder property of the full-node object.
• Generates a syncCallBack synchronization callback function object for handling block synchronization.
• Call the New function of the protocol/hello/hello.go file to perform Hello message processing. The internal processing of this method is as follows:
  • Generates a hello HelloSvc processor object and sets it as the HelloSvc property of the full node object.
  • Set the libp2p /fil/hello/1.0.0 protocol handler to the handleNewStream method of the protocol.hello.Handler object.
  • Set the connection notification for the libp2p network object to be the protocol.hello.helloNotify object.
• Set the various definitions by calling the setupProtocols method of the Filecoin node. The internal processing of this method is as follows:
  • Generate a protocol.block.MiningAPI object and save it as the BlockMiningAPI property of the full-node object.
  • Call the NewAPI function of the protocol/retrieval/api.go file to generate the protocol.retrieval.API object and promote the RetrievalAPI property of the full-node object.
  • Call the NewAPI function of the protocol/storage/api.go file to generate the protocol.storage.API object and promote the StorageAPI property of the full-node object.
• Using the node object as a parameter, call the NewMiner function of protocol/retrieval/NewMiner.go to generate a retrieve miner and set the RetrievalMiner property of the full node object. This function first generates a SetStreamHandler method that retrieves the miner, then calls the libp2p Host object of the full-node object, sets the handler for the /fil/retrieval/free/0.0.0 protocol to retrieve the miner's handleRetrievePieceForFree method, and finally returns to retrieve the miner.
• Call the PubSubSubscribe method of the porcelain.API ​​object, subscribe to the block notification of the /fil/blocks/devnet-3 topic, and set it to the BlockSub property of the full node.
• Call the PubSubSubscribe method of the porcelain.API ​​object, subscribe to the message notification of the /fil/msgs/devnet-3 topic, and set it to the MessageSub property of the full node.
• Start a coroutine, call the handleSubscription method of the whole node in the handleSubscription , and process the block notification. The main body of this method is an infinite loop. It reads the topic from the topic specified by the parameter and calls the method specified by the parameter for processing. The block notification is subscribed to /fil/blocks/devnet-3 , and its processing method is the processBlock method of the whole node.
• Start a coroutine, call the handleSubscription method of the whole node in the handleSubscription process the message notification. The message notification is subscribed to /fil/msgs/devnet-3 , and its processing method is the processMessage method of the whole node. This method deserializes the received message and then calls the Add method of the core.Inbox object to save the message object in the core.MessagePool object.
• Call the HeadEvents method of the chain.Store object and subscribe to the new block header topic new-head using the Sub method of the publish/subscribe object it returns.
• Call the ChainHead method of the porcelain.API ​​object, return the function that handles the block chain header, call the handleNewHeaviestTipSet method of the whole node in a handleNewHeaviestTipSet , and process the block chain header message.
• In non-offline mode, start the net.Bootstrapper boot object. The boot object will connect to all boot nodes, and after the connection is successful, call the Connected method of the protocol.hello.helloNotify object to send its own top-level block information to the remote node, and the remote node will send us its top level. Block information, thus opening the block synchronization process.
• Set up heartbeat services.