Package org.bitcoinj.store

Block stores persist blockchain data downloaded from remote peers. There is an SPV block store which preserves a ring buffer of headers on disk and is suitable for lightweight user wallets, a store that can calculate a full indexed UTXO set (i.e. it can query address balances), and a memory only store useful for unit tests.

Interface Summary

Interface	Description
BlockStore	An implementor of BlockStore saves StoredBlock objects to disk.
FullPrunedBlockStore	An implementor of FullPrunedBlockStore saves StoredBlock objects to some storage mechanism.

Class Summary

Class	Description
MemoryBlockStore	Keeps StoredBlocks in memory.
MemoryFullPrunedBlockStore	Keeps StoredBlocks, StoredUndoableBlocks and UTXOs in memory.
MemoryFullPrunedBlockStore.StoredBlockAndWasUndoableFlag
SPVBlockStore	An SPVBlockStore holds a limited number of block headers in a memory mapped ring buffer.

Exception Summary

Exception	Description
BlockStoreException	Thrown when something goes wrong with storing a block.
ChainFileLockedException	Thrown by SPVBlockStore when the process cannot gain exclusive access to the chain file.