openethereum/src/blockchain.rs

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use util::hash::*;
use util::rlp::*;
use util::hashdb::*;
use util::overlaydb::*;
use util::sha3::*;
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use blockheader::*;
use block::*;
use verifiedblock::*;
use importroute::*;
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pub struct BlockChain {
genesis_block: Vec<u8>,
genesis_hash: H256
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}
impl BlockChain {
pub fn new(genesis_block: Vec<u8>) -> BlockChain {
// consider creating `GenesisView` for genesis block RLP
let genesis_hash = BlockView::new(&genesis_block).parent_hash().sha3();
BlockChain {
genesis_block: genesis_block,
genesis_hash: genesis_hash
}
}
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pub fn genesis_block(&self, db: &OverlayDB) -> Block {
let root = BlockView::new(&self.genesis_block).state_root();
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if db.exists(&root) {
return Block::new_existing(db.clone(), root)
}
let mut block = Block::new(db.clone());
// TODO: commit genesis state (accounts) to block.state
block.mutable_state().commit_db();
// TODO: set previous block
// TODO: reset current
block
}
pub fn verify_block<'a>(&self, block: &'a [u8]) -> VerifiedBlock<'a> {
//TODO: verify block
VerifiedBlock::new(block)
}
pub fn import_block(&self, block: &[u8], db: &OverlayDB) -> ImportRoute {
let view = BlockView::new(block);
// check if we already know this block
if self.is_known(&view.sha3()) {
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}
// check if we already know parent of this block
if !self.is_known(&view.parent_hash()) {
}
unimplemented!();
}
/// Returns true if the given block is known
/// (though not necessarily a part of the canon chain).
pub fn is_known(&self, hash: &H256) -> bool {
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unimplemented!()
// TODO: check is hash exist in hashes
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}
}