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use network::constants;
use consensus::encode::{Decodable, Encodable};
use consensus::encode::{self, Decoder, Encoder};
use bitcoin_hashes::sha256d;
#[derive(PartialEq, Eq, Clone, Debug)]
pub enum InvType {
Error,
Transaction,
Block,
WitnessBlock,
WitnessTransaction
}
#[derive(PartialEq, Eq, Clone, Debug)]
pub struct GetBlocksMessage {
pub version: u32,
pub locator_hashes: Vec<sha256d::Hash>,
pub stop_hash: sha256d::Hash,
}
#[derive(PartialEq, Eq, Clone, Debug)]
pub struct GetHeadersMessage {
pub version: u32,
pub locator_hashes: Vec<sha256d::Hash>,
pub stop_hash: sha256d::Hash
}
#[derive(PartialEq, Eq, Clone, Debug)]
pub struct Inventory {
pub inv_type: InvType,
pub hash: sha256d::Hash
}
impl GetBlocksMessage {
pub fn new(locator_hashes: Vec<sha256d::Hash>, stop_hash: sha256d::Hash) -> GetBlocksMessage {
GetBlocksMessage {
version: constants::PROTOCOL_VERSION,
locator_hashes: locator_hashes.clone(),
stop_hash: stop_hash
}
}
}
impl_consensus_encoding!(GetBlocksMessage, version, locator_hashes, stop_hash);
impl GetHeadersMessage {
pub fn new(locator_hashes: Vec<sha256d::Hash>, stop_hash: sha256d::Hash) -> GetHeadersMessage {
GetHeadersMessage {
version: constants::PROTOCOL_VERSION,
locator_hashes: locator_hashes,
stop_hash: stop_hash
}
}
}
impl_consensus_encoding!(GetHeadersMessage, version, locator_hashes, stop_hash);
impl<S: Encoder> Encodable<S> for Inventory {
#[inline]
fn consensus_encode(&self, s: &mut S) -> Result<(), encode::Error> {
match self.inv_type {
InvType::Error => 0u32,
InvType::Transaction => 1,
InvType::Block => 2,
InvType::WitnessBlock => 0x40000002,
InvType::WitnessTransaction => 0x40000001
}.consensus_encode(s)?;
self.hash.consensus_encode(s)
}
}
impl<D: Decoder> Decodable<D> for Inventory {
#[inline]
fn consensus_decode(d: &mut D) -> Result<Inventory, encode::Error> {
let int_type: u32 = Decodable::consensus_decode(d)?;
Ok(Inventory {
inv_type: match int_type {
0 => InvType::Error,
1 => InvType::Transaction,
2 => InvType::Block,
_ => { panic!("bad inventory type field") }
},
hash: Decodable::consensus_decode(d)?
})
}
}
#[cfg(test)]
mod tests {
use super::{GetHeadersMessage, GetBlocksMessage};
use hex::decode as hex_decode;
use consensus::encode::{deserialize, serialize};
use std::default::Default;
#[test]
fn getblocks_message_test() {
let from_sat = hex_decode("72110100014a5e1e4baab89f3a32518a88c31bc87f618f76673e2cc77ab2127b7afdeda33b0000000000000000000000000000000000000000000000000000000000000000").unwrap();
let genhash = hex_decode("4a5e1e4baab89f3a32518a88c31bc87f618f76673e2cc77ab2127b7afdeda33b").unwrap();
let decode: Result<GetBlocksMessage, _> = deserialize(&from_sat);
assert!(decode.is_ok());
let real_decode = decode.unwrap();
assert_eq!(real_decode.version, 70002);
assert_eq!(real_decode.locator_hashes.len(), 1);
assert_eq!(serialize(&real_decode.locator_hashes[0]), genhash);
assert_eq!(real_decode.stop_hash, Default::default());
assert_eq!(serialize(&real_decode), from_sat);
}
#[test]
fn getheaders_message_test() {
let from_sat = hex_decode("72110100014a5e1e4baab89f3a32518a88c31bc87f618f76673e2cc77ab2127b7afdeda33b0000000000000000000000000000000000000000000000000000000000000000").unwrap();
let genhash = hex_decode("4a5e1e4baab89f3a32518a88c31bc87f618f76673e2cc77ab2127b7afdeda33b").unwrap();
let decode: Result<GetHeadersMessage, _> = deserialize(&from_sat);
assert!(decode.is_ok());
let real_decode = decode.unwrap();
assert_eq!(real_decode.version, 70002);
assert_eq!(real_decode.locator_hashes.len(), 1);
assert_eq!(serialize(&real_decode.locator_hashes[0]), genhash);
assert_eq!(real_decode.stop_hash, Default::default());
assert_eq!(serialize(&real_decode), from_sat);
}
}