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added balance_latest, storage_at_latest utilities

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with modus ponens panickers
This commit is contained in:
Robert Habermeier 2016-05-26 12:45:43 +02:00
parent 3c7e4b8c6c
commit 5afa4621f9
1 changed files with 17 additions and 1 deletions
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18
ethcore/src/client/mod.rs
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@ -83,14 +83,30 @@ pub trait BlockChainClient : Sync + Send {
/// Get address balance at the given block's state.
///
/// May not return None if given BlockID::Latest.
/// Returns None if and only if the block's root hash has been pruned from the DB.
fn balance(&self, address: &Address, id: BlockID) -> Option<U256>;
/// Get value of the storage at given position at the given block.
/// Get address balance at the latest block's state.
fn balance_latest(&self, address: &Address) -> U256 {
self.balance(address, BlockID::Latest)
.expect("balance will return Some if given BlockID::Latest. balance was given BlockID::Latest \
Therefore balance has returned Some; qed")
}
/// Get value of the storage at given position at the given block's state.
///
/// May not return None if given BlockID::Latest.
/// Returns None if and only if the block's root hash has been pruned from the DB.
fn storage_at(&self, address: &Address, position: &H256, id: BlockID) -> Option<H256>;
/// Get value of the storage at given position at the latest block's state.
fn storage_at_latest(&self, address: &Address, position: &H256) -> H256 {
self.storage_at(address, position, BlockID::Latest)
.expect("storage_at will return Some if given BlockID::Latest. storage_at was given BlockID::Latest. \
Therefore storage_at has returned Some; qed")
}
/// Get transaction with given hash.
fn transaction(&self, id: TransactionID) -> Option<LocalizedTransaction>;