A ledger is a record-keeping system used to document transactions and other financial activities. In the context of blockchain, a ledger is a digital, immutable record of all transactions that have occurred on the network, ensuring transparency and accountability.
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A ledger is crucial for maintaining the integrity of the blockchain.
In a blockchain, the ledger is decentralized and distributed across multiple nodes in the network. Each node has a copy of the ledger, ensuring that no single entity has control over it. Once a transaction is recorded in the ledger, it becomes a permanent part of the blockchain, making it impossible to alter or delete without the consensus of the network. This immutability and transparency are key features that make blockchain technology trustworthy.
Short example:
Suppose you send 1 Bitcoin to a friend.
The transaction is recorded in the Bitcoin ledger, which is distributed across the entire network.
Once the transaction is confirmed, it becomes part of the permanent record, ensuring that the transaction is transparent and cannot be changed.
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