Shared database key types for blockfilterindex and coinstatsindex.
Index data is usually indexed by height, but in case of a reorg, entries of blocks no longer in the main chain will be copied to a hash index by which they can still be queried. Keys for the height index have the type [DB_BLOCK_HEIGHT, uint32 (BE)]. The height is represented as big-endian so that sequential reads of filters by height are fast. Keys for the hash index have the type [DB_BLOCK_HASH, uint256].
| Name | Description |
|---|---|
DBHashKey | Database key for an index entry looked up by block hash. |
DBHeightKey | Database key for an index entry looked up by block height. |
| Name | Description |
|---|---|
CopyHeightIndexToHashIndex | Copy an index entry from the height index to the hash index. |
LookUpOne | Look up a single index entry for a block, trying the height index then the hash index. |
| Name | Description |
|---|---|
DB_BLOCK_HASH | Key prefix byte identifying an entry in the hash index. |
DB_BLOCK_HEIGHT | Key prefix byte identifying an entry in the height index. |