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use bitcoin::hash_types::Txid;
use bitcoin::blockdata::transaction::OutPoint as BitcoinOutPoint;
use bitcoin::blockdata::transaction::Transaction;
pub type TransactionData<'a> = [(usize, &'a Transaction)];
#[derive(Copy, Clone, PartialEq, Eq, PartialOrd, Ord, Debug, Hash)]
pub struct OutPoint {
pub txid: Txid,
pub index: u16,
}
impl OutPoint {
pub fn to_channel_id(&self) -> [u8; 32] {
let mut res = [0; 32];
res[..].copy_from_slice(&self.txid[..]);
res[30] ^= ((self.index >> 8) & 0xff) as u8;
res[31] ^= ((self.index >> 0) & 0xff) as u8;
res
}
pub fn into_bitcoin_outpoint(self) -> BitcoinOutPoint {
BitcoinOutPoint {
txid: self.txid,
vout: self.index as u32,
}
}
}
impl_writeable!(OutPoint, { txid, index });
#[cfg(test)]
mod tests {
use chain::transaction::OutPoint;
use bitcoin::blockdata::transaction::Transaction;
use bitcoin::consensus::encode;
use hex;
#[test]
fn test_channel_id_calculation() {
let tx: Transaction = encode::deserialize(&hex::decode("020000000001010e0adef48412e4361325ac1c6e36411299ab09d4f083b9d8ddb55fbc06e1b0c00000000000feffffff0220a1070000000000220020f81d95e040bd0a493e38bae27bff52fe2bb58b93b293eb579c01c31b05c5af1dc072cfee54a3000016001434b1d6211af5551905dc2642d05f5b04d25a8fe80247304402207f570e3f0de50546aad25a872e3df059d277e776dda4269fa0d2cc8c2ee6ec9a022054e7fae5ca94d47534c86705857c24ceea3ad51c69dd6051c5850304880fc43a012103cb11a1bacc223d98d91f1946c6752e358a5eb1a1c983b3e6fb15378f453b76bd00000000").unwrap()[..]).unwrap();
assert_eq!(&OutPoint {
txid: tx.txid(),
index: 0
}.to_channel_id(), &hex::decode("3e88dd7165faf7be58b3c5bb2c9c452aebef682807ea57080f62e6f6e113c25e").unwrap()[..]);
assert_eq!(&OutPoint {
txid: tx.txid(),
index: 1
}.to_channel_id(), &hex::decode("3e88dd7165faf7be58b3c5bb2c9c452aebef682807ea57080f62e6f6e113c25f").unwrap()[..]);
}
}