2e8ceb26df
Based on a suggestion made by @petertodd to the -devel mailing list and the discussion in that thread by him and other participants. * We've been using the term "consensus", but this commit introduces a formal definition for it and "consensus rules" as part of the block chain introduction. * Describe that consensus rules may change and may happen when they do: hard or soft forks. * Describe how full nodes can detect hard or soft forks, then describe how SPV clients can detect hard and soft forks using the more limited information available to them.
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[transaction version number]: /en/developer-guide#term-transaction-version-number "A version number prefixed to transactions to allow upgrading"" [transactions]: /en/developer-guide#transactions "A transaction spending satoshis" [unconfirmed]: /en/developer-guide#term-unconfirmed-transactions "A transaction which has not yet been added to the block chain" [unconfirmed transactions]: /en/developer-guide#term-unconfirmed-transactions "A transaction which has not yet been added to the block chain" [unique addresses]: /en/developer-guide#term-unique-address "Address which are only used once to protect privacy and increase security" [URI QR Code]: /en/developer-guide#term-uri-qr-code "A QR code containing a bitcoin: URI" [utxo]: /en/developer-guide#term-utxo "Unspent Transaction Output (UTXO) holding satoshis which have not yet been spent" [verified payments]: /en/developer-guide#verifying-payment "Payments which the receiver believes won't be double spent" [v2 block]: /en/developer-reference#term-v2-block "The current version of Bitcoin blocks" [wallet]: /en/developer-guide#wallets "Software which stores private keys to allow users to spend and receive satoshis" [Wallet Import Format]: /en/developer-guide#term-wallet-import-format "A private key specially formatted to allow easy import into a wallet" [wallets]: /en/developer-guide#wallets "Software which stores private keys to allow users to spend and receive satoshis" [X509Certificates]: /en/developer-examples#term-x509certificates