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Make CallApiAt::call_api_at work at light client (#1213)

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* light client contextual method call

* fixed off-by-one in test

* newlines + commas
This commit is contained in:
Svyatoslav Nikolsky
2018-12-10 16:02:00 +03:00
committed by GitHub
parent acf1b77bcd
commit 742cb33d90
7 changed files with 341 additions and 132 deletions
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substrate/core/client/src/blockchain.rs
+17 -5
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@@ -36,11 +36,6 @@ pub trait HeaderBackend<Block: BlockT>: Send + Sync {
/// Get block hash by number. Returns `None` if the header is not in the chain.
fn hash(&self, number: NumberFor<Block>) -> Result<Option<Block::Hash>>;
/// Get block header. Returns `UnknownBlock` error if block is not found.
fn expect_header(&self, id: BlockId<Block>) -> Result<Block::Header> {
self.header(id)?.ok_or_else(|| ErrorKind::UnknownBlock(format!("{}", id)).into())
}
/// Convert an arbitrary block ID into a block hash.
fn block_hash_from_id(&self, id: &BlockId<Block>) -> Result<Option<Block::Hash>> {
match *id {
@@ -56,6 +51,23 @@ pub trait HeaderBackend<Block: BlockT>: Send + Sync {
BlockId::Number(n) => Ok(Some(n)),
}
}
/// Get block header. Returns `UnknownBlock` error if block is not found.
fn expect_header(&self, id: BlockId<Block>) -> Result<Block::Header> {
self.header(id)?.ok_or_else(|| ErrorKind::UnknownBlock(format!("{}", id)).into())
}
/// Convert an arbitrary block ID into a block number. Returns `UnknownBlock` error if block is not found.
fn expect_block_number_from_id(&self, id: &BlockId<Block>) -> Result<NumberFor<Block>> {
self.block_number_from_id(id)
.and_then(|n| n.ok_or_else(|| ErrorKind::UnknownBlock(format!("{}", id)).into()))
}
/// Convert an arbitrary block ID into a block hash. Returns `UnknownBlock` error if block is not found.
fn expect_block_hash_from_id(&self, id: &BlockId<Block>) -> Result<Block::Hash> {
self.block_hash_from_id(id)
.and_then(|n| n.ok_or_else(|| ErrorKind::UnknownBlock(format!("{}", id)).into()))
}
}
/// Blockchain database backend. Does not perform any validation.