What Is Blockchain and How Does a Transaction Flow Work?
Blockchain is the technology underlying many of today's digital financial systems, such as cryptocurrency. It is a distributed database that continuously grows with a list of records (blocks) that are cryptographically linked. Below is an explanation of what blockchain is and how its transaction flow works:
What Is Blockchain?
Blockchain is a system that allows data (blocks) to be stored in a decentralized way across a number of nodes (computers) connected in a network. Each block in a blockchain contains a number of transactions that have been verified and validated. Transparency and high security are the main characteristics of blockchain because every transaction is permanently recorded and cannot be changed.
Transaction Flow in a Blockchain:
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Transaction Initiation: A user starts a transaction by submitting a request to send cryptocurrency or another digital asset.
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Transaction Collection: The transaction is then collected together with other transactions over a certain period of time to form a single block of transactions.
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Verification: Every transaction in the block must be verified by a number of nodes (computers) in the network. This verification ensures that the transaction is valid and that the sender owns the asset being sent.
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Merging into a Block: Once verified, the transaction is added to the latest block or the block currently being built (depending on the blockchain protocol used).
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Addition to the Blockchain: The completed block is then cryptographically linked to the previous block, forming a chain that cannot be changed (immutable). This is an important step to prevent editing or forgery of transactions that have already taken place.
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Confirmation and Settlement: Once added to the blockchain, the transaction is considered complete. Each node in the network updates its own database with the latest transaction information.
Conclusion
Blockchain is not just about cryptocurrency, but also about a new way of storing data securely and transparently. Its decentralized and encrypted transaction flow makes it an attractive solution for many future applications, from finance to supply chains and beyond.
Image source: https://www.researchgate.net/figure/Transaction-flow-in-a-Blockchain_fig1_342012510
