December 2018
Beginner to intermediate
564 pages
17h 34m
English
Content preview from Blockchain Developer's Guide
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Checkpoints
Checkpoints are hardcoded into the Litecoin Core client. With checkpoints set, all transactions are valid up to the checkpoint condition valid. This is set in case anyone wants to fork the blockchain and start from the very same block; the checkpoint will render false and won't accept any further transactions. The checkpoints.cpp file helps in managing the checkpoints in a blockchain source code:
namespace Checkpoints { CBlockIndex* GetLastCheckpoint(const CCheckpointData& data) { const MapCheckpoints& checkpoints = data.mapCheckpoints; for (const MapCheckpoints::value_type& i : reverse_iterate(checkpoints)) { const uint256& hash = i.second; BlockMap::const_iterator t = mapBlockIndex.find(hash); if (t != mapBlockIndex.end())Become an O’Reilly member and get unlimited access to this title plus top books and audiobooks from O’Reilly and nearly 200 top publishers, thousands of courses curated by job role, 150+ live events each month,
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