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Bulletproofs+ (#70)

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* Initial stab at Bulletproofs+

Does move around the existing Bulletproofs code, does still work as 
expected.

* Make the Clsag RCTPrunable type work with BP and BP+

* Initial set of BP+ bug fixes

* Further bug fixes

* Remove RING_LEN as a constant

* Monero v16 TX support

Doesn't implement view tags, nor going back to v14, nor the updated BP 
clawback logic.

* Support v14 and v16 at the same time
This commit is contained in:
Luke Parker
2022-07-27 04:05:43 -05:00
committed by GitHub
parent 37b8e3c025
commit 023afaf7ce
15 changed files with 384 additions and 132 deletions
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27
coins/monero/src/ringct/mod.rs
View File

@@ -31,7 +31,7 @@ impl RctBase {
w.write_all(&[rct_type])?;
match rct_type {
0 => Ok(()),
5 => {
5 | 6 => {
write_varint(&self.fee, w)?;
for ecdh in &self.ecdh_info {
w.write_all(ecdh)?;
@@ -78,18 +78,24 @@ impl RctPrunable {
pub fn rct_type(&self) -> u8 {
match self {
RctPrunable::Null => 0,
RctPrunable::Clsag { .. } => 5,
RctPrunable::Clsag { bulletproofs, .. } => {
if matches!(bulletproofs[0], Bulletproofs::Original { .. }) {
5
} else {
6
}
}
}
}
pub(crate) fn fee_weight(inputs: usize, outputs: usize) -> usize {
1 + Bulletproofs::fee_weight(outputs) + (inputs * (Clsag::fee_weight() + 32))
pub(crate) fn fee_weight(ring_len: usize, inputs: usize, outputs: usize) -> usize {
1 + Bulletproofs::fee_weight(outputs) + (inputs * (Clsag::fee_weight(ring_len) + 32))
}
pub fn serialize<W: std::io::Write>(&self, w: &mut W) -> std::io::Result<()> {
match self {
RctPrunable::Null => Ok(()),
RctPrunable::Clsag { bulletproofs, clsags, pseudo_outs } => {
RctPrunable::Clsag { bulletproofs, clsags, pseudo_outs, .. } => {
write_vec(Bulletproofs::serialize, bulletproofs, w)?;
write_raw_vec(Clsag::serialize, clsags, w)?;
write_raw_vec(write_point, pseudo_outs, w)
@@ -104,8 +110,11 @@ impl RctPrunable {
) -> std::io::Result<RctPrunable> {
Ok(match rct_type {
0 => RctPrunable::Null,
5 => RctPrunable::Clsag {
bulletproofs: read_vec(Bulletproofs::deserialize, r)?,
5 | 6 => RctPrunable::Clsag {
bulletproofs: read_vec(
if rct_type == 5 { Bulletproofs::deserialize } else { Bulletproofs::deserialize_plus },
r,
)?,
clsags: (0 .. decoys.len())
.map(|o| Clsag::deserialize(decoys[o], r))
.collect::<Result<_, _>>()?,
@@ -135,8 +144,8 @@ pub struct RctSignatures {
}
impl RctSignatures {
pub(crate) fn fee_weight(inputs: usize, outputs: usize) -> usize {
RctBase::fee_weight(outputs) + RctPrunable::fee_weight(inputs, outputs)
pub(crate) fn fee_weight(ring_len: usize, inputs: usize, outputs: usize) -> usize {
RctBase::fee_weight(outputs) + RctPrunable::fee_weight(ring_len, inputs, outputs)
}
pub fn serialize<W: std::io::Write>(&self, w: &mut W) -> std::io::Result<()> {