5. Synchronization Process and Pruning | Summary and Q&A

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July 12, 2019
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5. Synchronization Process and Pruning

TL;DR

Bitcoin network synchronization involves downloading and verifying the blockchain, validating transactions, and maintaining a UTXO (unspent transaction output) database.

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Questions & Answers

Q: How does the synchronization process for the Bitcoin network work?

Bitcoin network synchronization involves downloading blockchain headers, requesting and verifying blocks, validating transactions, and maintaining a UTXO database.

Q: What is the purpose of the UTXO database in the Bitcoin network?

The UTXO database stores unspent transaction outputs, which are used to validate transactions and track available balances.

Q: Can the blockchain database be pruned to free up storage space?

Yes, it is possible to prune the blockchain by deleting older blocks, but this reduces the ability to serve blocks to new network participants.

Summary & Key Takeaways

  • Bitcoin synchronization begins with downloading the blockchain headers, which is a quick process.

  • Once headers are downloaded, blocks are requested from other nodes, validated, and added to the blockchain database.

  • Transactions are validated, inputs are removed from the UTXO database, and outputs are added.

  • The initial block download process can take several hours or more, as it involves downloading, verifying, and storing a large amount of data.

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