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Transaction serialization

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This commit is contained in:
Jack Grigg
2018-08-23 23:35:39 +01:00
parent 91ff2c71cf
commit e490b79907
6 changed files with 593 additions and 0 deletions
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3
zcash_primitives/Cargo.toml
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@@ -7,3 +7,6 @@ authors = [
[dependencies]
byteorder = "1"
lazy_static = "1"
pairing = { path = "../pairing" }
sapling-crypto = { path = "../sapling-crypto" }

12
zcash_primitives/src/lib.rs
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@@ -1,3 +1,15 @@
#[macro_use]
extern crate lazy_static;
extern crate byteorder;
extern crate pairing;
extern crate sapling_crypto;
use sapling_crypto::jubjub::JubjubBls12;
mod serialize;
pub mod transaction;
lazy_static! {
static ref JUBJUB: JubjubBls12 = { JubjubBls12::new() };
}

302
zcash_primitives/src/transaction/components.rs Normal file
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@@ -0,0 +1,302 @@
use byteorder::{LittleEndian, ReadBytesExt, WriteBytesExt};
use pairing::{
bls12_381::{Bls12, Fr, FrRepr},
PrimeField, PrimeFieldRepr,
};
use sapling_crypto::{
jubjub::{edwards, Unknown},
redjubjub::{PublicKey, Signature},
};
use std::io::{self, Read, Write};
use serialize::Vector;
use JUBJUB;
// π_A + π_B + π_C
const GROTH_PROOF_SIZE: usize = (48 + 96 + 48);
// π_A + π_A' + π_B + π_B' + π_C + π_C' + π_K + π_H
const PHGR_PROOF_SIZE: usize = (33 + 33 + 65 + 33 + 33 + 33 + 33 + 33);
const ZC_NUM_JS_INPUTS: usize = 2;
const ZC_NUM_JS_OUTPUTS: usize = 2;
#[derive(Clone, Copy, Debug, PartialEq)]
pub struct Amount(pub i64);
struct Script(Vec<u8>);
impl Script {
pub fn read<R: Read>(mut reader: R) -> io::Result<Self> {
let script = Vector::read(&mut reader, |r| r.read_u8())?;
Ok(Script(script))
}
pub fn write<W: Write>(&self, mut writer: W) -> io::Result<()> {
Vector::write(&mut writer, &self.0, |w, e| w.write_u8(*e))
}
}
struct OutPoint {
hash: [u8; 32],
n: u32,
}
impl OutPoint {
pub fn read<R: Read>(mut reader: R) -> io::Result<Self> {
let mut hash = [0; 32];
reader.read_exact(&mut hash)?;
let n = reader.read_u32::<LittleEndian>()?;
Ok(OutPoint { hash, n })
}
pub fn write<W: Write>(&self, mut writer: W) -> io::Result<()> {
writer.write_all(&self.hash)?;
writer.write_u32::<LittleEndian>(self.n)
}
}
pub struct TxIn {
prevout: OutPoint,
script_sig: Script,
sequence: u32,
}
impl TxIn {
pub fn read<R: Read>(mut reader: &mut R) -> io::Result<Self> {
let prevout = OutPoint::read(&mut reader)?;
let script_sig = Script::read(&mut reader)?;
let sequence = reader.read_u32::<LittleEndian>()?;
Ok(TxIn {
prevout,
script_sig,
sequence,
})
}
pub fn write<W: Write>(&self, mut writer: W) -> io::Result<()> {
self.prevout.write(&mut writer)?;
self.script_sig.write(&mut writer)?;
writer.write_u32::<LittleEndian>(self.sequence)
}
}
pub struct TxOut {
value: Amount,
script_pubkey: Script,
}
impl TxOut {
pub fn read<R: Read>(mut reader: &mut R) -> io::Result<Self> {
let value = Amount(reader.read_i64::<LittleEndian>()?);
let script_pubkey = Script::read(&mut reader)?;
Ok(TxOut {
value,
script_pubkey,
})
}
pub fn write<W: Write>(&self, mut writer: W) -> io::Result<()> {
writer.write_i64::<LittleEndian>(self.value.0)?;
self.script_pubkey.write(&mut writer)
}
}
pub struct SpendDescription {
pub cv: edwards::Point<Bls12, Unknown>,
pub anchor: Fr,
pub nullifier: [u8; 32],
pub rk: PublicKey<Bls12>,
pub zkproof: [u8; GROTH_PROOF_SIZE],
pub spend_auth_sig: Signature,
}
impl SpendDescription {
pub fn read<R: Read>(mut reader: &mut R) -> io::Result<Self> {
let cv = edwards::Point::<Bls12, Unknown>::read(&mut reader, &JUBJUB)?;
let anchor = {
let mut f = FrRepr::default();
f.read_le(&mut reader)?;
Fr::from_repr(f).map_err(|e| io::Error::new(io::ErrorKind::InvalidInput, e))?
};
let mut nullifier = [0; 32];
reader.read_exact(&mut nullifier)?;
let rk = PublicKey::<Bls12>::read(&mut reader, &JUBJUB)?;
let mut zkproof = [0; GROTH_PROOF_SIZE];
reader.read_exact(&mut zkproof)?;
let spend_auth_sig = Signature::read(&mut reader)?;
Ok(SpendDescription {
cv,
anchor,
nullifier,
rk,
zkproof,
spend_auth_sig,
})
}
pub fn write<W: Write>(&self, mut writer: W) -> io::Result<()> {
self.cv.write(&mut writer)?;
self.anchor.into_repr().write_le(&mut writer)?;
writer.write_all(&self.nullifier)?;
self.rk.write(&mut writer)?;
writer.write_all(&self.zkproof)?;
self.spend_auth_sig.write(&mut writer)
}
}
pub struct OutputDescription {
pub cv: edwards::Point<Bls12, Unknown>,
pub cmu: Fr,
pub ephemeral_key: edwards::Point<Bls12, Unknown>,
pub enc_ciphertext: [u8; 580],
pub out_ciphertext: [u8; 80],
pub zkproof: [u8; GROTH_PROOF_SIZE],
}
impl OutputDescription {
pub fn read<R: Read>(mut reader: &mut R) -> io::Result<Self> {
let cv = edwards::Point::<Bls12, Unknown>::read(&mut reader, &JUBJUB)?;
let cmu = {
let mut f = FrRepr::default();
f.read_le(&mut reader)?;
Fr::from_repr(f).map_err(|e| io::Error::new(io::ErrorKind::InvalidInput, e))?
};
let ephemeral_key = edwards::Point::<Bls12, Unknown>::read(&mut reader, &JUBJUB)?;
let mut enc_ciphertext = [0; 580];
let mut out_ciphertext = [0; 80];
reader.read_exact(&mut enc_ciphertext)?;
reader.read_exact(&mut out_ciphertext)?;
let mut zkproof = [0; GROTH_PROOF_SIZE];
reader.read_exact(&mut zkproof)?;
Ok(OutputDescription {
cv,
cmu,
ephemeral_key,
enc_ciphertext,
out_ciphertext,
zkproof,
})
}
pub fn write<W: Write>(&self, mut writer: W) -> io::Result<()> {
self.cv.write(&mut writer)?;
self.cmu.into_repr().write_le(&mut writer)?;
self.ephemeral_key.write(&mut writer)?;
writer.write_all(&self.enc_ciphertext)?;
writer.write_all(&self.out_ciphertext)?;
writer.write_all(&self.zkproof)
}
}
enum SproutProof {
Groth([u8; GROTH_PROOF_SIZE]),
PHGR([u8; PHGR_PROOF_SIZE]),
}
pub struct JSDescription {
vpub_old: Amount,
vpub_new: Amount,
anchor: [u8; 32],
nullifiers: [[u8; 32]; ZC_NUM_JS_INPUTS],
commitments: [[u8; 32]; ZC_NUM_JS_OUTPUTS],
ephemeral_key: [u8; 32],
random_seed: [u8; 32],
macs: [[u8; 32]; ZC_NUM_JS_INPUTS],
proof: SproutProof,
ciphertexts: [[u8; 601]; ZC_NUM_JS_OUTPUTS],
}
impl JSDescription {
pub fn read<R: Read>(mut reader: R, use_groth: bool) -> io::Result<Self> {
let vpub_old = Amount(reader.read_i64::<LittleEndian>()?);
let vpub_new = Amount(reader.read_i64::<LittleEndian>()?);
let mut anchor = [0; 32];
reader.read_exact(&mut anchor)?;
let mut nullifiers = [[0; 32]; ZC_NUM_JS_INPUTS];
nullifiers
.iter_mut()
.map(|nf| reader.read_exact(nf))
.collect::<io::Result<()>>()?;
let mut commitments = [[0; 32]; ZC_NUM_JS_OUTPUTS];
commitments
.iter_mut()
.map(|cm| reader.read_exact(cm))
.collect::<io::Result<()>>()?;
let mut ephemeral_key = [0; 32];
let mut random_seed = [0; 32];
reader.read_exact(&mut ephemeral_key)?;
reader.read_exact(&mut random_seed)?;
let mut macs = [[0; 32]; ZC_NUM_JS_INPUTS];
macs.iter_mut()
.map(|mac| reader.read_exact(mac))
.collect::<io::Result<()>>()?;
let proof = match use_groth {
true => {
let mut proof = [0; GROTH_PROOF_SIZE];
reader.read_exact(&mut proof)?;
SproutProof::Groth(proof)
}
false => {
let mut proof = [0; PHGR_PROOF_SIZE];
reader.read_exact(&mut proof)?;
SproutProof::PHGR(proof)
}
};
let mut ciphertexts = [[0; 601]; ZC_NUM_JS_OUTPUTS];
ciphertexts
.iter_mut()
.map(|ct| reader.read_exact(ct))
.collect::<io::Result<()>>()?;
Ok(JSDescription {
vpub_old,
vpub_new,
anchor,
nullifiers,
commitments,
ephemeral_key,
random_seed,
macs,
proof,
ciphertexts,
})
}
pub fn write<W: Write>(&self, mut writer: W) -> io::Result<()> {
writer.write_i64::<LittleEndian>(self.vpub_old.0)?;
writer.write_i64::<LittleEndian>(self.vpub_new.0)?;
writer.write_all(&self.anchor)?;
writer.write_all(&self.nullifiers[0])?;
writer.write_all(&self.nullifiers[1])?;
writer.write_all(&self.commitments[0])?;
writer.write_all(&self.commitments[1])?;
writer.write_all(&self.ephemeral_key)?;
writer.write_all(&self.random_seed)?;
writer.write_all(&self.macs[0])?;
writer.write_all(&self.macs[1])?;
match &self.proof {
SproutProof::Groth(p) => writer.write_all(p)?,
SproutProof::PHGR(p) => writer.write_all(p)?,
}
writer.write_all(&self.ciphertexts[0])?;
writer.write_all(&self.ciphertexts[1])
}
}

179
zcash_primitives/src/transaction/mod.rs Normal file
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@@ -0,0 +1,179 @@
use byteorder::{LittleEndian, ReadBytesExt, WriteBytesExt};
use sapling_crypto::redjubjub::Signature;
use std::io::{self, Read, Write};
use serialize::Vector;
mod components;
#[cfg(test)]
mod tests;
use self::components::{Amount, JSDescription, OutputDescription, SpendDescription, TxIn, TxOut};
const OVERWINTER_VERSION_GROUP_ID: u32 = 0x03C48270;
const OVERWINTER_TX_VERSION: u32 = 3;
const SAPLING_VERSION_GROUP_ID: u32 = 0x892F2085;
const SAPLING_TX_VERSION: u32 = 4;
/// A Zcash transaction.
pub struct Transaction {
overwintered: bool,
version: u32,
version_group_id: u32,
vin: Vec<TxIn>,
vout: Vec<TxOut>,
lock_time: u32,
expiry_height: u32,
value_balance: Amount,
shielded_spends: Vec<SpendDescription>,
shielded_outputs: Vec<OutputDescription>,
joinsplits: Vec<JSDescription>,
joinsplit_pubkey: [u8; 32],
joinsplit_sig: [u8; 64],
binding_sig: Option<Signature>,
}
impl Transaction {
pub fn read<R: Read>(mut reader: R) -> io::Result<Self> {
let header = reader.read_u32::<LittleEndian>()?;
let overwintered = (header >> 31) == 1;
let version = header & 0x7FFFFFFF;
let version_group_id = match overwintered {
true => reader.read_u32::<LittleEndian>()?,
false => 0,
};
let is_overwinter_v3 = overwintered
&& version_group_id == OVERWINTER_VERSION_GROUP_ID
&& version == OVERWINTER_TX_VERSION;
let is_sapling_v4 = overwintered
&& version_group_id == SAPLING_VERSION_GROUP_ID
&& version == SAPLING_TX_VERSION;
if overwintered && !(is_overwinter_v3 || is_sapling_v4) {
return Err(io::Error::new(
io::ErrorKind::InvalidInput,
"Unknown transaction format",
));
}
let vin = Vector::read(&mut reader, TxIn::read)?;
let vout = Vector::read(&mut reader, TxOut::read)?;
let lock_time = reader.read_u32::<LittleEndian>()?;
let expiry_height = match is_overwinter_v3 || is_sapling_v4 {
true => reader.read_u32::<LittleEndian>()?,
false => 0,
};
let (value_balance, shielded_spends, shielded_outputs) = if is_sapling_v4 {
let vb = Amount(reader.read_i64::<LittleEndian>()?);
let ss = Vector::read(&mut reader, SpendDescription::read)?;
let so = Vector::read(&mut reader, OutputDescription::read)?;
(vb, ss, so)
} else {
(Amount(0), vec![], vec![])
};
let mut joinsplit_pubkey = [0; 32];
let mut joinsplit_sig = [0; 64];
let joinsplits = if version >= 2 {
let jss = Vector::read(&mut reader, |r| {
JSDescription::read(r, overwintered && version >= SAPLING_TX_VERSION)
})?;
if !jss.is_empty() {
reader.read_exact(&mut joinsplit_pubkey)?;
reader.read_exact(&mut joinsplit_sig)?;
}
jss
} else {
vec![]
};
let binding_sig =
match is_sapling_v4 && !(shielded_spends.is_empty() && shielded_outputs.is_empty()) {
true => Some(Signature::read(&mut reader)?),
false => None,
};
Ok(Transaction {
overwintered,
version,
version_group_id,
vin,
vout,
lock_time,
expiry_height,
value_balance,
shielded_spends,
shielded_outputs,
joinsplits,
joinsplit_pubkey,
joinsplit_sig,
binding_sig,
})
}
pub fn write<W: Write>(&self, mut writer: W) -> io::Result<()> {
writer.write_u32::<LittleEndian>(self.header())?;
if self.overwintered {
writer.write_u32::<LittleEndian>(self.version_group_id)?;
}
let is_overwinter_v3 = self.overwintered
&& self.version_group_id == OVERWINTER_VERSION_GROUP_ID
&& self.version == OVERWINTER_TX_VERSION;
let is_sapling_v4 = self.overwintered
&& self.version_group_id == SAPLING_VERSION_GROUP_ID
&& self.version == SAPLING_TX_VERSION;
if self.overwintered && !(is_overwinter_v3 || is_sapling_v4) {
return Err(io::Error::new(
io::ErrorKind::InvalidInput,
"Unknown transaction format",
));
}
Vector::write(&mut writer, &self.vin, |w, e| e.write(w))?;
Vector::write(&mut writer, &self.vout, |w, e| e.write(w))?;
writer.write_u32::<LittleEndian>(self.lock_time)?;
if is_overwinter_v3 || is_sapling_v4 {
writer.write_u32::<LittleEndian>(self.expiry_height)?;
}
if is_sapling_v4 {
writer.write_i64::<LittleEndian>(self.value_balance.0)?;
Vector::write(&mut writer, &self.shielded_spends, |w, e| e.write(w))?;
Vector::write(&mut writer, &self.shielded_outputs, |w, e| e.write(w))?;
}
if self.version >= 2 {
Vector::write(&mut writer, &self.joinsplits, |w, e| e.write(w))?;
if !self.joinsplits.is_empty() {
writer.write_all(&self.joinsplit_pubkey)?;
writer.write_all(&self.joinsplit_sig)?;
}
}
if is_sapling_v4 && !(self.shielded_spends.is_empty() && self.shielded_outputs.is_empty()) {
match self.binding_sig {
Some(sig) => sig.write(&mut writer)?,
None => {
return Err(io::Error::new(
io::ErrorKind::InvalidInput,
"Missing binding signature",
))
}
}
}
Ok(())
}
fn header(&self) -> u32 {
let mut header = self.version;
if self.overwintered {
header |= 1 << 31;
}
header
}
}

94
zcash_primitives/src/transaction/tests.rs Normal file
View File

@@ -0,0 +1,94 @@
use super::Transaction;
#[test]
fn tx_read_write() {
let data = [
0x04, 0x00, 0x00, 0x80, 0x85, 0x20, 0x2f, 0x89, 0x01, 0x23, 0xfc, 0x3c, 0x5d, 0x56, 0xa1,
0x1e, 0xae, 0xac, 0xdd, 0x39, 0xd0, 0x2b, 0x9d, 0x4e, 0x08, 0xd8, 0xf7, 0x99, 0x6e, 0x09,
0x40, 0x98, 0x8c, 0x7c, 0x9b, 0x3a, 0xf4, 0x7c, 0x85, 0x45, 0x59, 0x00, 0x00, 0x00, 0x00,
0x6b, 0x48, 0x30, 0x45, 0x02, 0x21, 0x00, 0xb6, 0x4d, 0x29, 0x65, 0xc6, 0xf6, 0x68, 0x58,
0x8d, 0xbe, 0xeb, 0x60, 0xaa, 0x1c, 0x37, 0xb9, 0x68, 0xb4, 0x38, 0x17, 0xc3, 0x0d, 0x3d,
0xf0, 0x65, 0x64, 0x92, 0x9f, 0x84, 0xca, 0x58, 0x60, 0x02, 0x20, 0x6f, 0x51, 0xd8, 0x3b,
0x10, 0x4d, 0x22, 0x41, 0x0d, 0x29, 0xf1, 0x81, 0xf3, 0x2d, 0x95, 0xff, 0x2f, 0x16, 0xdf,
0xf5, 0xbc, 0xa8, 0x97, 0x29, 0xfe, 0x6b, 0xca, 0x28, 0xb3, 0x65, 0xb7, 0xe7, 0x01, 0x21,
0x02, 0x0f, 0x83, 0xff, 0x10, 0x99, 0xb9, 0x5b, 0x95, 0xb4, 0xe1, 0xd4, 0x09, 0xaf, 0x22,
0xa7, 0xdc, 0xc0, 0xc6, 0x1a, 0x2d, 0x34, 0x20, 0x88, 0x64, 0x01, 0xfa, 0xc8, 0x24, 0x03,
0x40, 0x4f, 0x51, 0xff, 0xff, 0xff, 0xff, 0x01, 0xf0, 0x05, 0x31, 0x01, 0x00, 0x00, 0x00,
0x00, 0x19, 0x76, 0xa9, 0x14, 0xc0, 0x88, 0xd3, 0x6e, 0xe2, 0xb1, 0x12, 0xce, 0x4b, 0x9c,
0xec, 0x9d, 0xd4, 0x68, 0x4a, 0x68, 0xa7, 0x07, 0xb8, 0x43, 0x88, 0xac, 0x00, 0x00, 0x00,
0x00, 0xfe, 0x32, 0x04, 0x00, 0x00, 0x4c, 0x3b, 0xfb, 0xff, 0xff, 0xff, 0xff, 0x00, 0x01,
0xbc, 0x59, 0x9f, 0x29, 0x3a, 0x69, 0xf5, 0x31, 0x54, 0xe0, 0xe9, 0x70, 0x94, 0xc7, 0x78,
0xa7, 0xb9, 0xf2, 0x58, 0x5c, 0x21, 0x7f, 0x0f, 0x5c, 0x75, 0xc3, 0xb0, 0xc4, 0x32, 0x58,
0x72, 0xc4, 0xea, 0xd2, 0x13, 0x13, 0x49, 0x69, 0xcf, 0x0e, 0x24, 0x09, 0x1e, 0x5b, 0xc1,
0x8a, 0x61, 0xb9, 0xac, 0x51, 0xd4, 0x01, 0xf3, 0x7f, 0x4b, 0x6a, 0x69, 0xad, 0xdd, 0xef,
0x19, 0xde, 0xee, 0x2f, 0xf1, 0x47, 0x25, 0x10, 0x45, 0xd9, 0x0c, 0x6b, 0x63, 0x40, 0xe9,
0x14, 0x81, 0x06, 0xcb, 0xa2, 0xbd, 0xf7, 0x2b, 0xc4, 0xd4, 0xb2, 0x54, 0xbd, 0x97, 0x88,
0x40, 0x61, 0x22, 0xa2, 0x73, 0xb7, 0x06, 0x9f, 0x86, 0x65, 0x35, 0xa6, 0xee, 0x20, 0x4b,
0xd4, 0x50, 0x21, 0x15, 0x9a, 0x05, 0x2a, 0x15, 0xa7, 0x14, 0x63, 0xf3, 0x03, 0x46, 0x9f,
0x29, 0x1d, 0x96, 0x31, 0xc1, 0xc5, 0x37, 0x7c, 0x41, 0x14, 0xea, 0xfa, 0x38, 0xcd, 0x1a,
0x36, 0xc0, 0x06, 0x17, 0xb3, 0xb7, 0xf9, 0x3a, 0xfa, 0xbb, 0xd0, 0x73, 0x52, 0x54, 0x35,
0xc7, 0xae, 0x35, 0x9c, 0xb9, 0x1f, 0xb3, 0x3f, 0x2e, 0xf9, 0x5c, 0xb4, 0x09, 0x43, 0x3a,
0x53, 0x71, 0x6b, 0xa0, 0xe5, 0x22, 0x81, 0x57, 0xe2, 0x8e, 0xaa, 0xa1, 0x3a, 0x88, 0xaf,
0xd4, 0xe2, 0xe7, 0x3f, 0x5d, 0xf6, 0x42, 0x54, 0x17, 0x09, 0xf7, 0x88, 0xbf, 0x2a, 0xbd,
0xf7, 0xe8, 0xac, 0xa2, 0x97, 0xbb, 0xa7, 0x2f, 0xce, 0xa1, 0x56, 0x7a, 0x62, 0x35, 0xbb,
0xd3, 0x66, 0x2c, 0x90, 0x92, 0x98, 0xfb, 0xcd, 0x48, 0x43, 0xa0, 0xf4, 0x05, 0xbe, 0x43,
0x9d, 0xea, 0x9a, 0x94, 0x80, 0x60, 0x73, 0x7e, 0x12, 0x1e, 0x5a, 0x5e, 0x60, 0xa0, 0x96,
0x02, 0xc9, 0x1c, 0x43, 0xee, 0x93, 0xe2, 0xdf, 0x45, 0xf8, 0x2e, 0xf4, 0x88, 0xf6, 0x6d,
0xd6, 0xee, 0xd1, 0xa4, 0x68, 0x15, 0x71, 0x30, 0x61, 0xef, 0x41, 0xfc, 0x0e, 0xe3, 0xfa,
0xbe, 0x71, 0x09, 0xd5, 0x4c, 0x5f, 0xb3, 0xc3, 0x00, 0xef, 0x31, 0xf7, 0x3a, 0xd3, 0xde,
0x9c, 0xe3, 0xb3, 0xf0, 0x9a, 0x4b, 0xc8, 0xdd, 0x59, 0xe1, 0x7b, 0x04, 0xa5, 0xc5, 0x38,
0xe9, 0x44, 0x04, 0x78, 0xaf, 0xa1, 0x0e, 0x2a, 0xd5, 0xe5, 0x5d, 0x04, 0x66, 0x1c, 0x66,
0x75, 0x76, 0x79, 0x95, 0xcb, 0xec, 0x6a, 0x41, 0x8f, 0xdc, 0x30, 0x97, 0xd5, 0xfe, 0xa0,
0xca, 0x47, 0x2c, 0x50, 0x1e, 0x8a, 0xd4, 0xef, 0x4c, 0x85, 0xd3, 0x01, 0x31, 0x03, 0xd5,
0x96, 0xeb, 0xbf, 0x17, 0x4d, 0xf4, 0x4e, 0xdf, 0x05, 0x97, 0xc4, 0x35, 0xeb, 0x7d, 0x92,
0xa0, 0x58, 0xd7, 0x52, 0x25, 0x26, 0x42, 0xe7, 0x1e, 0x90, 0xc1, 0xbf, 0xdd, 0xb0, 0x13,
0xf7, 0xb3, 0x6e, 0x6b, 0xe6, 0x2a, 0xbc, 0xcf, 0x21, 0xac, 0xe4, 0xda, 0x98, 0xc8, 0xa8,
0x08, 0x31, 0x67, 0xa0, 0x12, 0x24, 0x0b, 0xc7, 0xf7, 0xcd, 0x92, 0x9a, 0xf7, 0x18, 0x30,
0x09, 0x3c, 0x5a, 0xe2, 0xf0, 0xe5, 0x61, 0x42, 0x15, 0x15, 0x6a, 0xa5, 0xac, 0xd4, 0x4a,
0x18, 0x7f, 0xad, 0xde, 0x66, 0xba, 0x3c, 0xc1, 0x6e, 0xf1, 0xd7, 0x05, 0x92, 0x92, 0xec,
0x3d, 0x2c, 0x9d, 0xec, 0x86, 0x91, 0x73, 0xf9, 0x91, 0x01, 0x79, 0xfe, 0x64, 0xb7, 0x61,
0xf4, 0xdc, 0x45, 0x31, 0x4c, 0x51, 0xff, 0x8f, 0x4d, 0x40, 0x65, 0x98, 0xf1, 0x2e, 0x14,
0x1a, 0x9f, 0x5e, 0x13, 0x72, 0x0f, 0x27, 0x17, 0x48, 0xb6, 0x1c, 0xfc, 0xf3, 0xfc, 0x3b,
0xc1, 0x5f, 0x2b, 0xe3, 0xfd, 0x4e, 0x9e, 0x87, 0x87, 0x49, 0xfc, 0xe4, 0x29, 0xb1, 0x4c,
0x62, 0x0e, 0x2c, 0x2b, 0xee, 0x11, 0x0d, 0x32, 0x39, 0xb0, 0x6b, 0xb1, 0x4e, 0x29, 0x1b,
0x0c, 0x1a, 0x53, 0xa5, 0x3b, 0xe2, 0x0a, 0xf2, 0xec, 0x7e, 0x88, 0xc3, 0x82, 0xac, 0x0f,
0xa3, 0x82, 0xf8, 0x46, 0x2b, 0xa8, 0x1d, 0x78, 0x05, 0x4e, 0x2a, 0x5a, 0x8a, 0xcc, 0x97,
0x16, 0xab, 0xb5, 0xb6, 0x7d, 0xfb, 0xa5, 0xef, 0xde, 0x91, 0x66, 0x44, 0x2b, 0x2f, 0xef,
0xb9, 0x0c, 0xb0, 0xd1, 0x69, 0xda, 0xb9, 0x8d, 0x01, 0x50, 0x0b, 0x61, 0x13, 0x96, 0xb7,
0x7c, 0xba, 0xcc, 0x47, 0xd9, 0x69, 0xc6, 0x92, 0x51, 0x2e, 0xf2, 0x4b, 0x2c, 0x8f, 0xd2,
0x43, 0x09, 0x42, 0x30, 0x67, 0x4b, 0x2d, 0x02, 0xfa, 0x99, 0x6f, 0x08, 0xf8, 0x67, 0x78,
0xf2, 0x3f, 0x1c, 0x97, 0x0b, 0x9a, 0xef, 0x13, 0xe8, 0x44, 0xd6, 0x45, 0xc4, 0x3b, 0x5d,
0xa6, 0xaa, 0x94, 0xba, 0x4e, 0x81, 0x08, 0x49, 0xd4, 0x97, 0xd7, 0x65, 0xfc, 0x35, 0x96,
0x99, 0xa1, 0x47, 0xf9, 0xab, 0xb6, 0x53, 0xa8, 0x0d, 0x3f, 0x3c, 0x28, 0x4c, 0x9b, 0x7b,
0x2b, 0x66, 0x2f, 0xa0, 0x18, 0x09, 0xea, 0x9b, 0xc1, 0x56, 0x3a, 0x38, 0xf6, 0x88, 0xc7,
0x51, 0x37, 0xbb, 0x3b, 0x1e, 0xff, 0xcb, 0xab, 0x1d, 0xc5, 0x74, 0xdb, 0xff, 0x30, 0xcd,
0x9d, 0xd3, 0xf7, 0x28, 0x9f, 0x79, 0x0e, 0x0e, 0x5e, 0x6b, 0x40, 0xda, 0x9b, 0x30, 0x3b,
0x14, 0xfd, 0xae, 0x2f, 0xa5, 0xb9, 0xfa, 0x3c, 0x67, 0x42, 0xfb, 0x9f, 0xec, 0x2f, 0x1a,
0xd4, 0x44, 0xc2, 0x0a, 0x4d, 0xc5, 0x19, 0xe3, 0x7a, 0x2f, 0x2b, 0xcc, 0x4e, 0xe2, 0x43,
0xc3, 0x94, 0xa8, 0xa0, 0x10, 0xca, 0xe5, 0x6c, 0x10, 0x38, 0x87, 0x97, 0x7f, 0x47, 0x49,
0x5f, 0x7b, 0x1e, 0x19, 0x50, 0xd1, 0xaa, 0x84, 0x0f, 0x7c, 0x37, 0x60, 0xa0, 0x3d, 0x26,
0x7b, 0x46, 0x83, 0x7b, 0xb4, 0x1c, 0xae, 0x42, 0x35, 0x44, 0x44, 0x40, 0x42, 0x5a, 0x64,
0x78, 0xa9, 0x19, 0xdd, 0xf8, 0xf7, 0x62, 0x0c, 0x33, 0x3a, 0xc1, 0x22, 0x4b, 0xf2, 0x6d,
0x89, 0xba, 0xa9, 0x55, 0x52, 0x03, 0xcc, 0xab, 0x56, 0x1b, 0x6e, 0xdc, 0x1c, 0xe6, 0x8e,
0x43, 0x2e, 0xc2, 0xc0, 0xd6, 0x83, 0x37, 0xa6, 0x51, 0xa2, 0x79, 0xee, 0x79, 0x04, 0xfc,
0xd9, 0xd7, 0xae, 0xff, 0x25, 0x24, 0x25, 0xe3, 0x7b, 0xa8, 0x54, 0xe4, 0x84, 0xef, 0x97,
0xc9, 0x24, 0x36, 0x83, 0x91, 0x17, 0xa5, 0xcb, 0xc9, 0x07, 0xbd, 0x5c, 0x06, 0x44, 0xde,
0x68, 0xdd, 0x61, 0xf7, 0x65, 0xc5, 0x37, 0xb2, 0xc6, 0x6d, 0x29, 0xdc, 0x11, 0x47, 0xf8,
0x71, 0xd7, 0x89, 0xf6, 0xd2, 0x4a, 0x88, 0x1b, 0xab, 0x64, 0x48, 0xaf, 0x81, 0x22, 0xba,
0x43, 0xd1, 0x18, 0x92, 0x00, 0x40, 0x18, 0xa6, 0xdc, 0x89, 0xcc, 0x87, 0x2b, 0xd9, 0x85,
0x37, 0x42, 0x86, 0x18, 0xb8, 0xe3, 0x95, 0x8b, 0x8a, 0x24, 0xdf, 0x1b, 0xd6, 0xc3, 0x03,
0xb8, 0x65, 0xad, 0xa6, 0x5d, 0xf8, 0x6a, 0x2d, 0xeb, 0xee, 0xef, 0x89, 0xca, 0xab, 0xbc,
0xb4, 0xe5, 0xb6, 0x4a, 0x60, 0x16, 0x37, 0xa6, 0xc8, 0x95, 0x5d, 0x34, 0xe8, 0xb6, 0xde,
0x0a, 0x83, 0x7a, 0x01, 0xa9, 0x22, 0x67, 0xdc, 0xc9, 0xc8, 0x3a, 0xe5, 0x84, 0x9f, 0x0d,
0xc7, 0x2d, 0x02, 0x00, 0x30, 0xc7, 0xe3, 0x00, 0x50, 0xdd, 0x8c, 0x53, 0xd3, 0xcb, 0x83,
0x3b, 0xb0, 0x27, 0x48, 0x61, 0x2e, 0xd3, 0x4e, 0xeb, 0x42, 0x1f, 0x8c, 0xa7, 0x53, 0x72,
0x9a, 0xc2, 0x42, 0x70, 0x97, 0x54, 0x4c, 0x29, 0xfd, 0x63, 0x69, 0xf1, 0xd3, 0x66, 0xfc,
0x51, 0x4a, 0x5a, 0xd1, 0x06, 0xd7, 0x85, 0x91, 0x1f, 0x7b, 0xf7, 0x39, 0xe1, 0x0f, 0x35,
0xbe, 0x6a, 0x40, 0xbf, 0x54, 0xeb, 0xc1, 0x03,
];
let tx = Transaction::read(&data[..]).unwrap();
let mut encoded = Vec::with_capacity(data.len());
tx.write(&mut encoded).unwrap();
assert_eq!(&data[..], &encoded[..]);
}