Digital currency-block chain terminology finishing __blockchain

TX (Transaction) a deal

Balance Balance

Utxo (unspent Transaction output) indicates that the outputs are not spent

With a realistic wallet for example, a wallet has a 10 yuan, a 5 yuan, a 1 yuan, a total of 16 yuan. The balance of an account in Bitcoin is also calculated on the basis of this account Utxo.

When spending 12 yuan to buy things, you can put 10 yuan and 5 yuan to take out, then get the change of 3 yuan, then this time before the 10 yuan and 5 yuan because already spent is no longer utxo, the new change of 3 yuan to become a new utxo, plus the previous not moved 1 Yuan Utxo, the current balance is 4 yuan. The new transaction was recorded on the new block, but there was no change in the historical block data.

Bitcoin uses a linked block chain to record all transactions, and when the previous Uyxo appears in the subsequent transaction input, it means that the Utxo has been spent, no longer utxo. If you start to calculate the balance in all Bitcoin addresses from the first block, you can calculate the balance of each Bitcoin account at different times. Key pair generation key pair generation Auditability auditable
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