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1

To put it simply, blockchain is essentially a history of transactions, with built in measures to confirm that this transaction history cannot be altered. That being said, transactions can be either spent or unspent. Spent transactions are transactions that have already been used as inputs in another transaction. Unspent transactions are transactions that ...


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Each non-pruning full node (peer) stores a complete copy of the blockchain - pruned nodes store a complete copy of the current state, but may not have all historical blocks available. When a node validates a transaction or a block, it is only validating it against its local view of the blockchain - this means that looking up data is pretty fast, since all ...


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