Initial Version of Fast Sync #4465
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…ue to insert pivot block and its receipts
…rrent block in a few stages, improve pivot calculation
…es,remove extra comments, cleanup and goimports
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adsorptionenthalpy
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ONECasey
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Issue
Fast sync is a synchronization method. When a new node joins the network, it needs to download and verify the entire blockchain history to ensure it has a complete and accurate copy of the network's state. However, in traditional full synchronization, this process can be time-consuming and resource-intensive, as it requires downloading and processing every block from the genesis block to the latest block.
Fast sync is designed to expedite this synchronization process by allowing new nodes to download only the most recent state of the blockchain, rather than the entire history. Instead of starting from the genesis block, fast sync enables nodes to download a snapshot of the current blockchain state and verifies it. Then, it retrieves recent block headers and validates them against the snapshot. By doing so, the new node can quickly catch up to the current state of the network without downloading the entire history.
During fast sync, the node relies on other nodes in the network to provide the necessary block headers and state information. This method significantly reduces the time and resources required for synchronization, making it a more efficient way for new nodes to join the network.
It's important to note that fast sync is a one-time process performed when a new node initially joins the network. Once the node is synchronized, it transitions to normal operation, where it receives and validates new blocks in the blockchain as they are produced.