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Changes tries: support forks (#950)

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* forks support in changes trie storage

* moved convert_hash to primitives

* optimize ChangesTrieRootsStorage::root when anchor is canonicalized
This commit is contained in:
Svyatoslav Nikolsky
2018-11-13 14:17:14 +03:00
committed by Gav Wood
parent 037f9dde10
commit 6e3c56c135
25 changed files with 276 additions and 138 deletions
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substrate/core/client/db/src/utils.rs
+11
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@@ -187,6 +187,17 @@ pub fn read_header<Block: BlockT>(
}
}
/// Required header from the database.
pub fn require_header<Block: BlockT>(
db: &KeyValueDB,
col_index: Option<u32>,
col: Option<u32>,
id: BlockId<Block>,
) -> client::error::Result<Block::Header> {
read_header(db, col_index, col, id)
.and_then(|header| header.ok_or_else(|| client::error::ErrorKind::UnknownBlock(format!("{}", id)).into()))
}
/// Read meta from the database.
pub fn read_meta<Block>(db: &KeyValueDB, col_meta: Option<u32>, col_header: Option<u32>) -> Result<
Meta<<<Block as BlockT>::Header as HeaderT>::Number, Block::Hash>,