BitcoinCash/specification
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2019-12-18 15:07:17 -05:00
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home.md
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- thinblock
- get_xblocktx
- xblocktx
- [Node Handshake](/protocol/network/node-handshake)
- Simple Payment Verification (SPV)
- Bloom Filters
- Simple Ledger Protocol
protocol/network/messages.md
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### Net Magic
The `net magic` field is always `E3E1F3E8`. Any message received that does not begin with the `net magic` should be ignored.
The network identifier is used to separate blockchains and test networks. This reduces unnecessary load on peers, allowing them to rapidly ban nodes rather then forcing the peer to do a blockchain analysis before banning or disconnecting. For Bitcoin Cash main net, the `net magic` field is always `E3E1F3E8`. Any message received that does not begin with the `net magic` is invalid.
The `net magic` is designed to be unlikely to occur in normal data--the characters are rarely used upper ASCII, are not valid as UTF-8, and produce a large 32-bit integer with any alignment. `E3E1F3E8` is the ASCII string, "cash", with each byte's highest bit set.
protocol/network/node-handshake.md
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# Node Handshake