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use std::io; use hash::H256; use ser::{Serializable, Stream, Deserializable, Reader, Error as ReaderError}; #[derive(Debug, PartialEq, Clone, Copy)] #[repr(u32)] pub enum InventoryType { Error = 0, MessageTx = 1, MessageBlock = 2, MessageFilteredBlock = 3, MessageCompactBlock = 4, MessageWitnessTx = 0x40000001, MessageWitnessBlock = 0x40000002, MessageWitnessFilteredBlock = 0x40000003, } impl InventoryType { pub fn from_u32(v: u32) -> Option<Self> { match v { 0 => Some(InventoryType::Error), 1 => Some(InventoryType::MessageTx), 2 => Some(InventoryType::MessageBlock), 3 => Some(InventoryType::MessageFilteredBlock), 4 => Some(InventoryType::MessageCompactBlock), 0x40000001 => Some(InventoryType::MessageWitnessTx), 0x40000002 => Some(InventoryType::MessageWitnessBlock), 0x40000003 => Some(InventoryType::MessageWitnessFilteredBlock), _ => None } } } impl From<InventoryType> for u32 { fn from(i: InventoryType) -> Self { i as u32 } } impl Serializable for InventoryType { fn serialize(&self, stream: &mut Stream) { stream.append(&u32::from(*self)); } } impl Deserializable for InventoryType { fn deserialize<T>(reader: &mut Reader<T>) -> Result<Self, ReaderError> where T: io::Read { let t: u32 = try!(reader.read()); InventoryType::from_u32(t).ok_or(ReaderError::MalformedData) } } #[derive(Debug, PartialEq, Clone)] pub struct InventoryVector { pub inv_type: InventoryType, pub hash: H256, } impl InventoryVector { pub fn tx(hash: H256) -> Self { InventoryVector { inv_type: InventoryType::MessageTx, hash: hash, } } pub fn witness_tx(hash: H256) -> Self { InventoryVector { inv_type: InventoryType::MessageWitnessTx, hash: hash, } } pub fn block(hash: H256) -> Self { InventoryVector { inv_type: InventoryType::MessageBlock, hash: hash, } } pub fn witness_block(hash: H256) -> Self { InventoryVector { inv_type: InventoryType::MessageWitnessBlock, hash: hash, } } } impl Serializable for InventoryVector { fn serialize(&self, stream: &mut Stream) { stream .append(&self.inv_type) .append(&self.hash); } } impl Deserializable for InventoryVector { fn deserialize<T>(reader: &mut Reader<T>) -> Result<Self, ReaderError> where T: io::Read { let vec = InventoryVector { inv_type: try!(reader.read()), hash: try!(reader.read()), }; Ok(vec) } } #[cfg(test)] mod tests { use bytes::Bytes; use ser::{serialize, deserialize}; use super::{InventoryVector, InventoryType}; #[test] fn test_inventory_serialize() { let expected = "020000000400000000000000000000000000000000000000000000000000000000000000".into(); let inventory = InventoryVector { inv_type: InventoryType::MessageBlock, hash: 4u8.into(), }; assert_eq!(serialize(&inventory), expected); } #[test] fn test_inventory_deserialize() { let raw: Bytes = "020000000400000000000000000000000000000000000000000000000000000000000000".into(); let expected = InventoryVector { inv_type: InventoryType::MessageBlock, hash: 4u8.into(), }; assert_eq!(expected, deserialize(raw.as_ref()).unwrap()); } #[test] fn test_inventory_type_conversion() { assert_eq!(0u32, InventoryType::Error.into()); assert_eq!(1u32, InventoryType::MessageTx.into()); assert_eq!(2u32, InventoryType::MessageBlock.into()); assert_eq!(3u32, InventoryType::MessageFilteredBlock.into()); assert_eq!(4u32, InventoryType::MessageCompactBlock.into()); assert_eq!(0x40000001u32, InventoryType::MessageWitnessTx.into()); assert_eq!(0x40000002u32, InventoryType::MessageWitnessBlock.into()); assert_eq!(0x40000003u32, InventoryType::MessageWitnessFilteredBlock.into()); assert_eq!(InventoryType::from_u32(0).unwrap(), InventoryType::Error); assert_eq!(InventoryType::from_u32(1).unwrap(), InventoryType::MessageTx); assert_eq!(InventoryType::from_u32(2).unwrap(), InventoryType::MessageBlock); assert_eq!(InventoryType::from_u32(3).unwrap(), InventoryType::MessageFilteredBlock); assert_eq!(InventoryType::from_u32(4).unwrap(), InventoryType::MessageCompactBlock); assert_eq!(InventoryType::from_u32(0x40000001).unwrap(), InventoryType::MessageWitnessTx); assert_eq!(InventoryType::from_u32(0x40000002).unwrap(), InventoryType::MessageWitnessBlock); assert_eq!(InventoryType::from_u32(0x40000003).unwrap(), InventoryType::MessageWitnessFilteredBlock); } }