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rebuild uncles hash from uncle headers

This commit is contained in:
Robert Habermeier 2016-07-11 15:10:05 +02:00
parent da9e9692dc
commit 24ec696062
1 changed files with 37 additions and 21 deletions
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58
ethcore/src/snapshot/block.rs
View File

@ -24,9 +24,9 @@ use header::Header;
use views::BlockView;
use util::rlp::{DecoderError, RlpStream, Stream, UntrustedRlp, View};
use util::{Bytes, H256};
use util::{Bytes, Hashable, H256};
const HEADER_FIELDS: usize = 11;
const HEADER_FIELDS: usize = 10;
const BLOCK_FIELDS: usize = 2;
pub struct AbridgedBlock {
@ -53,7 +53,7 @@ impl AbridgedBlock {
let seal_fields = header.seal();
// 11 header fields, unknown amount of seal fields, and 2 block fields.
// 10 header fields, unknown amount of seal fields, and 2 block fields.
let mut stream = RlpStream::new_list(
HEADER_FIELDS +
seal_fields.len() +
@ -62,7 +62,6 @@ impl AbridgedBlock {
// write header values.
stream
.append(&header.uncles_hash())
.append(&header.author())
.append(&header.state_root())
.append(&header.transactions_root())
@ -74,14 +73,14 @@ impl AbridgedBlock {
.append(&header.timestamp())
.append(&header.extra_data());
// write block values.
stream.append(&block_view.transactions()).append(&block_view.uncles());
// write seal fields.
for field in seal_fields {
stream.append_raw(&field, 1);
}
// write block values.
stream.append(&block_view.transactions()).append(&block_view.uncles());
AbridgedBlock {
rlp: stream.out(),
}
@ -95,29 +94,46 @@ impl AbridgedBlock {
let mut header = Header {
parent_hash: parent_hash,
uncles_hash: try!(rlp.val_at(0)),
author: try!(rlp.val_at(1)),
state_root: try!(rlp.val_at(2)),
transactions_root: try!(rlp.val_at(3)),
receipts_root: try!(rlp.val_at(4)),
log_bloom: try!(rlp.val_at(5)),
difficulty: try!(rlp.val_at(6)),
author: try!(rlp.val_at(0)),
state_root: try!(rlp.val_at(1)),
transactions_root: try!(rlp.val_at(2)),
receipts_root: try!(rlp.val_at(3)),
log_bloom: try!(rlp.val_at(4)),
difficulty: try!(rlp.val_at(5)),
number: number,
gas_limit: try!(rlp.val_at(7)),
gas_used: try!(rlp.val_at(8)),
timestamp: try!(rlp.val_at(9)),
extra_data: try!(rlp.val_at(10)),
gas_limit: try!(rlp.val_at(6)),
gas_used: try!(rlp.val_at(7)),
timestamp: try!(rlp.val_at(8)),
extra_data: try!(rlp.val_at(9)),
..Default::default()
};
let transactions = try!(rlp.val_at(10));
let uncles: Vec<Header> = try!(rlp.val_at(11));
let seal: Vec<Bytes> = try!(rlp.val_at(11));
// iterator-based approach is cleaner but doesn't work w/ try.
let seal = {
let mut seal = Vec::new();
for i in 12..rlp.item_count() {
seal.push(try!(rlp.val_at(i)));
}
seal
};
header.set_seal(seal);
let uncle_bytes = uncles.iter()
.fold(RlpStream::new_list(uncles.len()), |mut s, u| {
s.append_raw(&u.rlp(::basic_types::Seal::With), 1);
s
}).out();
header.uncles_hash = uncle_bytes.sha3();
Ok(Block {
header: header,
transactions: try!(rlp.val_at(12)),
uncles: try!(rlp.val_at(13)),
transactions: transactions,
uncles: uncles,
})
}
}