_ Git - rust-lightning/blob - src/util/transaction_utils.rs

   1 use bitcoin::blockdata::transaction::{TxIn, TxOut};
   2 use bitcoin_hashes::sha256d::Hash as Sha256dHash;
   3
   4 use std::cmp::Ordering;
   5
   6 pub fn sort_outputs<T>(outputs: &mut Vec<(TxOut, T)>) {
   7         outputs.sort_unstable_by(|a, b| {
   8                 a.0.value.cmp(&b.0.value).then(
   9                         a.0.script_pubkey[..].cmp(&b.0.script_pubkey[..])
  10                 )
  11         });
  12 }
  13
  14 fn cmp(a: &Sha256dHash, b: &Sha256dHash) -> Ordering {
  15         use bitcoin_hashes::Hash;
  16
  17         let av = a.into_inner();
  18         let bv = b.into_inner();
  19         for i in (0..32).rev() {
  20                 let cmp = av[i].cmp(&bv[i]);
  21                 if cmp != Ordering::Equal {
  22                         return cmp;
  23                 }
  24         }
  25         Ordering::Equal
  26 }
  27
  28 pub fn sort_inputs<T>(inputs: &mut Vec<(TxIn, T)>) {
  29         inputs.sort_unstable_by(|a, b| {
  30                 cmp( &a.0.previous_output.txid, &b.0.previous_output.txid).then(
  31                 a.0.previous_output.vout.cmp(&b.0.previous_output.vout))
  32         });
  33 }
  34
  35 #[cfg(test)]
  36 mod tests {
  37         use super::*;
  38
  39         use bitcoin::blockdata::script::{Script, Builder};
  40         use bitcoin::blockdata::transaction::{TxOut, OutPoint};
  41         use bitcoin_hashes::sha256d::Hash as Sha256dHash;
  42         use bitcoin_hashes::hex::FromHex;
  43
  44         use hex::decode;
  45
  46         #[test]
  47         fn sort_output_by_value() {
  48                 let txout1 = TxOut {
  49                         value:  100,
  50                         script_pubkey: Builder::new().push_int(0).into_script()
  51                 };
  52                 let txout1_ = txout1.clone();
  53
  54                 let txout2 = TxOut {
  55                         value: 99,
  56                         script_pubkey: Builder::new().push_int(0).into_script()
  57                 };
  58                 let txout2_ = txout2.clone();
  59
  60                 let mut outputs = vec![(txout1, "ignore"), (txout2, "ignore")];
  61                 sort_outputs(&mut outputs);
  62
  63                 assert_eq!(
  64                         &outputs,
  65                         &vec![(txout2_, "ignore"), (txout1_, "ignore")]
  66                         );
  67         }
  68
  69         #[test]
  70         fn sort_output_by_script_pubkey() {
  71                 let txout1 = TxOut {
  72                         value:  100,
  73                         script_pubkey: Builder::new().push_int(3).into_script(),
  74                 };
  75                 let txout1_ = txout1.clone();
  76
  77                 let txout2 = TxOut {
  78                         value: 100,
  79                         script_pubkey: Builder::new().push_int(1).push_int(2).into_script()
  80                 };
  81                 let txout2_ = txout2.clone();
  82
  83                 let mut outputs = vec![(txout1, "ignore"), (txout2, "ignore")];
  84                 sort_outputs(&mut outputs);
  85
  86                 assert_eq!(
  87                         &outputs,
  88                         &vec![(txout2_, "ignore"), (txout1_, "ignore")]
  89                         );
  90         }
  91
  92         #[test]
  93         fn sort_output_by_bip_test() {
  94                 let txout1 = TxOut {
  95                         value: 100000000,
  96                         script_pubkey: script_from_hex("41046a0765b5865641ce08dd39690aade26dfbf5511430ca428a3089261361cef170e3929a68aee3d8d4848b0c5111b0a37b82b86ad559fd2a745b44d8e8d9dfdc0cac")
  97                 };
  98                 let txout1_ = txout1.clone();
  99
 100                 // doesn't deserialize cleanly:
 101                 let txout2 = TxOut {
 102                         value: 2400000000,
 103                         script_pubkey: script_from_hex("41044a656f065871a353f216ca26cef8dde2f03e8c16202d2e8ad769f02032cb86a5eb5e56842e92e19141d60a01928f8dd2c875a390f67c1f6c94cfc617c0ea45afac")
 104                 };
 105                 let txout2_ = txout2.clone();
 106
 107                 let mut outputs = vec![(txout1, "ignore"), (txout2, "ignore")];
 108                 sort_outputs(&mut outputs);
 109
 110                 assert_eq!(&outputs, &vec![(txout1_, "ignore"), (txout2_, "ignore")]);
 111         }
 112
 113         fn script_from_hex(hex_str: &str) -> Script {
 114                 Script::from(decode(hex_str).unwrap())
 115         }
 116
 117         macro_rules! bip_txout_tests {
 118                 ($($name:ident: $value:expr,)*) => {
 119                         $(
 120                                 #[test]
 121                                 fn $name() {
 122                                         let expected_raw: Vec<(u64, &str)> = $value;
 123                                         let expected: Vec<(TxOut, &str)> = expected_raw.iter()
 124                                                 .map(|txout_raw| TxOut {
 125                                                         value: txout_raw.0,
 126                                                         script_pubkey: script_from_hex(txout_raw.1)
 127                                                 }).map(|txout| (txout, "ignore"))
 128                                         .collect();
 129
 130                                         let mut outputs = expected.clone();
 131                                         outputs.reverse(); // prep it
 132
 133                                         // actually do the work!
 134                                         sort_outputs(&mut outputs);
 135
 136                                         assert_eq!(outputs, expected);
 137                                 }
 138                         )*
 139                 }
 140         }
 141
 142         const TXOUT1: [(u64, &str); 2] = [
 143                 (400057456, "76a9144a5fba237213a062f6f57978f796390bdcf8d01588ac"),
 144                 (40000000000, "76a9145be32612930b8323add2212a4ec03c1562084f8488ac"),
 145         ];
 146         const TXOUT2: [(u64, &str); 2] = [
 147                 (100000000, "41046a0765b5865641ce08dd39690aade26dfbf5511430ca428a3089261361cef170e3929a68aee3d8d4848b0c5111b0a37b82b86ad559fd2a745b44d8e8d9dfdc0cac"),
 148                 (2400000000, "41044a656f065871a353f216ca26cef8dde2f03e8c16202d2e8ad769f02032cb86a5eb5e56842e92e19141d60a01928f8dd2c875a390f67c1f6c94cfc617c0ea45afac"),
 149         ];
 150         bip_txout_tests! {
 151                 bip69_txout_test_1: TXOUT1.to_vec(),
 152                 bip69_txout_test_2: TXOUT2.to_vec(),
 153         }
 154
 155         macro_rules! bip_txin_tests {
 156                 ($($name:ident: $value:expr,)*) => {
 157                         $(
 158                                 #[test]
 159                                 fn $name() {
 160                                         let expected_raw: Vec<(&str, u32)> = $value;
 161                                         let expected: Vec<(TxIn, &str)> = expected_raw.iter().map(
 162                                                 |txin_raw| TxIn {
 163                                                         previous_output: OutPoint {
 164                                                                 txid: Sha256dHash::from_hex(txin_raw.0).unwrap(),
 165                                                                 vout: txin_raw.1,
 166                                                         },
 167                                                         script_sig: Script::new(),
 168                                                         sequence: 0,
 169                                                         witness: vec![]
 170                                                 }
 171                                                 ).map(|txin| (txin, "ignore")).collect();
 172
 173                                         let mut inputs = expected.clone();
 174                                         inputs.reverse();
 175
 176                                         sort_inputs(&mut inputs);
 177
 178                                         assert_eq!(expected, inputs);
 179                                 }
 180                         )*
 181                 }
 182         }
 183
 184         const TXIN1_BIP69: [(&str, u32); 17] = [
 185                 ("0e53ec5dfb2cb8a71fec32dc9a634a35b7e24799295ddd5278217822e0b31f57", 0),
 186                 ("26aa6e6d8b9e49bb0630aac301db6757c02e3619feb4ee0eea81eb1672947024", 1),
 187                 ("28e0fdd185542f2c6ea19030b0796051e7772b6026dd5ddccd7a2f93b73e6fc2", 0),
 188                 ("381de9b9ae1a94d9c17f6a08ef9d341a5ce29e2e60c36a52d333ff6203e58d5d", 1),
 189                 ("3b8b2f8efceb60ba78ca8bba206a137f14cb5ea4035e761ee204302d46b98de2", 0),
 190                 ("402b2c02411720bf409eff60d05adad684f135838962823f3614cc657dd7bc0a", 1),
 191                 ("54ffff182965ed0957dba1239c27164ace5a73c9b62a660c74b7b7f15ff61e7a", 1),
 192                 ("643e5f4e66373a57251fb173151e838ccd27d279aca882997e005016bb53d5aa", 0),
 193                 ("6c1d56f31b2de4bfc6aaea28396b333102b1f600da9c6d6149e96ca43f1102b1", 1),
 194                 ("7a1de137cbafb5c70405455c49c5104ca3057a1f1243e6563bb9245c9c88c191", 0),
 195                 ("7d037ceb2ee0dc03e82f17be7935d238b35d1deabf953a892a4507bfbeeb3ba4", 1),
 196                 ("a5e899dddb28776ea9ddac0a502316d53a4a3fca607c72f66c470e0412e34086", 0),
 197                 ("b4112b8f900a7ca0c8b0e7c4dfad35c6be5f6be46b3458974988e1cdb2fa61b8", 0),
 198                 ("bafd65e3c7f3f9fdfdc1ddb026131b278c3be1af90a4a6ffa78c4658f9ec0c85", 0),
 199                 ("de0411a1e97484a2804ff1dbde260ac19de841bebad1880c782941aca883b4e9", 1),
 200                 ("f0a130a84912d03c1d284974f563c5949ac13f8342b8112edff52971599e6a45", 0),
 201                 ("f320832a9d2e2452af63154bc687493484a0e7745ebd3aaf9ca19eb80834ad60", 0),
 202         ];
 203
 204
 205         const TXIN2_BIP69: [(&str, u32); 2] = [
 206                 ("35288d269cee1941eaebb2ea85e32b42cdb2b04284a56d8b14dcc3f5c65d6055", 0),
 207                 ("35288d269cee1941eaebb2ea85e32b42cdb2b04284a56d8b14dcc3f5c65d6055", 1),
 208         ];
 209         bip_txin_tests! {
 210                 bip69_txin_test_1: TXIN1_BIP69.to_vec(),
 211                 bip69_txin_test_2: TXIN2_BIP69.to_vec(),
 212         }
 213 }