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use rlp::{self, Encodable, Decodable, RlpStream, DecoderError, UntrustedRlp}; use bigint::{Address, Gas, H256, U256, B256, H64}; use bloom::LogsBloom; use std::cmp::Ordering; use blockchain::chain::HeaderHash; use sha3::{Keccak256, Digest}; use super::RlpHash; #[derive(Clone, Debug, PartialEq, Eq)] pub struct TotalHeader(pub Header, U256); impl TotalHeader { pub fn from_genesis(header: Header) -> TotalHeader { let diff = header.difficulty; TotalHeader(header, diff) } pub fn from_parent(header: Header, parent: &TotalHeader) -> TotalHeader { let diff = header.difficulty + parent.1; TotalHeader(header, diff) } pub fn total_difficulty(&self) -> U256 { self.1 } } impl HeaderHash<H256> for TotalHeader { fn parent_hash(&self) -> Option<H256> { self.0.parent_hash() } fn header_hash(&self) -> H256 { self.0.header_hash() } } impl Into<Header> for TotalHeader { fn into(self) -> Header { self.0 } } impl Ord for TotalHeader { fn cmp(&self, other: &TotalHeader) -> Ordering { self.1.cmp(&other.1) } } impl PartialOrd for TotalHeader { fn partial_cmp(&self, other: &TotalHeader) -> Option<Ordering> { Some(self.cmp(other)) } } #[derive(Clone, Debug, PartialEq, Eq)] pub struct Header { pub parent_hash: H256, pub ommers_hash: H256, pub beneficiary: Address, pub state_root: H256, pub transactions_root: H256, pub receipts_root: H256, pub logs_bloom: LogsBloom, pub difficulty: U256, pub number: U256, pub gas_limit: Gas, pub gas_used: Gas, pub timestamp: u64, pub extra_data: B256, pub mix_hash: H256, pub nonce: H64, } impl HeaderHash<H256> for Header { fn parent_hash(&self) -> Option<H256> { if self.number == U256::zero() { None } else { Some(self.parent_hash) } } fn header_hash(&self) -> H256 { H256::from(Keccak256::digest(&rlp::encode(self).to_vec()).as_slice()) } } impl Header { pub fn partial_rlp_append(&self, s: &mut RlpStream) { s.begin_list(13); s.append(&self.parent_hash); s.append(&self.ommers_hash); s.append(&self.beneficiary); s.append(&self.state_root); s.append(&self.transactions_root); s.append(&self.receipts_root); s.append(&self.logs_bloom); s.append(&self.difficulty); s.append(&self.number); s.append(&self.gas_limit); s.append(&self.gas_used); s.append(&self.timestamp); s.append(&self.extra_data); } pub fn partial_hash(&self) -> H256 { let mut stream = RlpStream::new(); self.partial_rlp_append(&mut stream); H256::from(Keccak256::digest(&stream.drain()).as_slice()) } } impl Encodable for Header { fn rlp_append(&self, s: &mut RlpStream) { s.begin_list(15); s.append(&self.parent_hash); s.append(&self.ommers_hash); s.append(&self.beneficiary); s.append(&self.state_root); s.append(&self.transactions_root); s.append(&self.receipts_root); s.append(&self.logs_bloom); s.append(&self.difficulty); s.append(&self.number); s.append(&self.gas_limit); s.append(&self.gas_used); s.append(&self.timestamp); s.append(&self.extra_data); s.append(&self.mix_hash); s.append(&self.nonce); } } impl Decodable for Header { fn decode(rlp: &UntrustedRlp) -> Result<Self, DecoderError> { Ok(Self { parent_hash: rlp.val_at(0)?, ommers_hash: rlp.val_at(1)?, beneficiary: rlp.val_at(2)?, state_root: rlp.val_at(3)?, transactions_root: rlp.val_at(4)?, receipts_root: rlp.val_at(5)?, logs_bloom: rlp.val_at(6)?, difficulty: rlp.val_at(7)?, number: rlp.val_at(8)?, gas_limit: rlp.val_at(9)?, gas_used: rlp.val_at(10)?, timestamp: rlp.val_at(11)?, extra_data: rlp.val_at(12)?, mix_hash: rlp.val_at(13)?, nonce: rlp.val_at(14)?, }) } } impl RlpHash for Header { fn rlp_hash(&self) -> H256 { H256::from(Keccak256::digest(&rlp::encode(self)).as_slice()) } } #[cfg(test)] mod tests { use rlp::{encode, decode, Rlp}; use hexutil::read_hex; use bigint::{U256, H256, Address, Gas}; use bloom::LogsBloom; use header::Header; use std::str::FromStr; #[test] fn block_0_rlp() { let raw = read_hex("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").unwrap(); let block_raw = Rlp::new(&raw); let block: Header = block_raw.val_at(0); assert_eq!(block.number, U256::from(0u64)); let encoded = encode(&block).to_vec(); let encoded_ref: &[u8] = encoded.as_ref(); assert_eq!(encoded_ref, block_raw.at(0).as_raw()); } #[test] fn block_1_rlp() { let raw = read_hex("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").unwrap(); let block_raw = Rlp::new(&raw); let block: Header = block_raw.val_at(0); assert_eq!(block.parent_hash, H256::from_str("d4e56740f876aef8c010b86a40d5f56745a118d0906a34e69aec8c0db1cb8fa3").unwrap()); assert_eq!(block.ommers_hash, H256::from_str("1dcc4de8dec75d7aab85b567b6ccd41ad312451b948a7413f0a142fd40d49347").unwrap()); assert_eq!(block.beneficiary, Address::from_str("05a56e2d52c817161883f50c441c3228cfe54d9f").unwrap()); assert_eq!(block.state_root, H256::from_str("d67e4d450343046425ae4271474353857ab860dbc0a1dde64b41b5cd3a532bf3").unwrap()); assert_eq!(block.transactions_root, H256::from_str("56e81f171bcc55a6ff8345e692c0f86e5b48e01b996cadc001622fb5e363b421").unwrap()); assert_eq!(block.logs_bloom, LogsBloom::default()); assert_eq!(block.difficulty, U256::from(17171480576u64)); assert_eq!(block.number, U256::from(1u64)); assert_eq!(block.gas_limit, Gas::from(5000u64)); assert_eq!(block.gas_used, Gas::zero()); assert_eq!(block.timestamp, 1438269988u64); assert_eq!(block, decode(&encode(&block).to_vec())); let encoded = encode(&block).to_vec(); let encoded_ref: &[u8] = encoded.as_ref(); assert_eq!(encoded_ref, block_raw.at(0).as_raw()); } }