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Lamport stack items #362

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Merged
jonasmartin merged 5 commits into from
Aug 25, 2026
Merged

Lamport stack items #362

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86c03bf
add missing stack items to lamprot_check_false function
crivasr Aug 19, 2026
fb5f43b
reduce gc protocol cost
crivasr Aug 19, 2026
666ba21
remove duplicated stack items
crivasr Aug 21, 2026
e3c3a04
update lamport_check to add multiple lamport signatures based on mess…
crivasr Aug 21, 2026
667f780
Merge branch 'dev' into lamport-stack-items
crivasr Aug 24, 2026
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7 changes: 6 additions & 1 deletion src/program/protocols/gc_drp.rs
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Original file line number Diff line number Diff line change
Expand Up @@ -17,7 +17,7 @@ use key_manager::{
use protocol_builder::{
builder::ProtocolBuilder,
graph::graph::GraphOptions,
scripts::{self, KeyType, ProtocolScript, SignMode},
scripts::{self, KeyType, ProtocolScript, SignMode, StackItem},
types::{
connection::{InputSpec, OutputSpec},
input::{SighashType, SpendMode},
Expand Down Expand Up @@ -709,6 +709,11 @@ impl GCDisputeResolutionProtocol {
0,
)?;

lamport_check.add_stack_item(StackItem::new_schnorr_sig(true));
for _ in 0..key.message_bit_length().unwrap() {
lamport_check.add_stack_item(StackItem::new_lamport_sig());
}

Ok(lamport_check)
}

Expand Down
24 changes: 4 additions & 20 deletions src/program/protocols/union/scripts.rs
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Original file line number Diff line number Diff line change
Expand Up @@ -86,21 +86,13 @@ pub fn init_challenge_script(
));
}

let mut protocol_script = verify_winternitz_signatures_aux::<String>(
verify_winternitz_signatures_aux::<String>(
wt_dispute_key,
&keys.to_vec(),
sign_mode,
true,
Some(vec![validate_slot_id, validate_pegout_id]),
)?;

// This block could be inside verify_winternitz_signatures_aux
protocol_script.add_stack_item(StackItem::new_schnorr_sig(true));
for (_, key) in keys {
protocol_script.add_stack_item(StackItem::new_winternitz_sig(&key));
}

Ok(protocol_script)
)
}

pub fn cosign_script(
Expand Down Expand Up @@ -147,21 +139,13 @@ pub fn cosign_script(
));
}

let mut protocol_script = verify_winternitz_signatures_aux::<String>(
verify_winternitz_signatures_aux::<String>(
op_dispute_key,
&keys,
sign_mode,
true,
Some(validate_cosign),
)?;

// This block could be inside verify_winternitz_signatures_aux
protocol_script.add_stack_item(StackItem::new_schnorr_sig(true));
for (_, key) in keys {
protocol_script.add_stack_item(StackItem::new_winternitz_sig(&key));
}

Ok(protocol_script)
)
}

fn get_stack_equality_script(words: u32) -> ScriptBuf {
Expand Down
2 changes: 1 addition & 1 deletion tests/test_gc_drp.rs
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Original file line number Diff line number Diff line change
Expand Up @@ -172,7 +172,7 @@ fn test_aux(
SignMode::Aggregate,
)];

let protocol_cost = 26_000;
let protocol_cost = 12_000;
let (utxo, initial_out_type) = init_utxo_new(
&mut helper.wallet,
&pair_0_1_agg_pub_key,
Expand Down
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