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ecdsa committed Mar 22, 2017
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13 changes: 7 additions & 6 deletions hardfork.rst
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Expand Up @@ -34,17 +34,18 @@ BTC and BTU here.
If you own Bitcoins before the fork, a transaction that spends these
coins after the fork will, in general, be valid on both chains. This
means that you will be spending BTC and BTU simultaneously. This is
called a 'replay attack'. To prevent this, you need to move send your
coins using transactions that differ on both chains.
called a 'replay attack'. To prevent this, you need to move your coins
using transactions that differ on both chains.


Electrum and SPV
----------------

Electrum fetches block headers from the Bitcoin network in order to
verify that your transactions are included in the Blockchain. When a
transaction is displayed as 'verified' by the GUI, it means that
Electrum received a proof that the transaction is in the blockchain.
verify that your transactions are included in the Bitcoin
blockchain. When a transaction is displayed as 'verified' by the GUI,
it means that Electrum received a proof that the transaction is in the
blockchain.

By default, Electrum trusts the longest blockchain to be the valid
Bitcoin blockchain. Electrum is not able to know if block headers
Expand All @@ -53,7 +54,7 @@ checks that blocks have been mined with a valid Proof of Work, and
that transactions are included in these blocks.

Electrum has two different modes for fetching your wallet history:
Manual server selection and auto-connect. In auto-connect mode,
manual server selection and auto-connect. In auto-connect mode,
Electrum will always request your wallet history from a node that has
the longest blockchain. If auto-connect is disabled, your wallet
history will be fetched from a server you choose. If there is a fork,
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