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calculate MainPod id in a dynamic-friendly way (#241)

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* calculate MainPod id in a dynamic-friendly way

The MainPod id is now calculated with front padding and a fixed size
independent of max_public_statements so that introduction gadgets can be
verified by a MainPod while paying only for the number of statements
they use.  This is because with front padding of none-statements we can
precompute the poseidon state corresponding to absorbing all the padding
statements and only pay constraints for the non-padding statements.

The id is calculated as follows:
`id = hash(serialize(reverse(statements || none-statements)))`

* fix test
This commit is contained in:
Eduard S. 2025-05-23 10:12:28 +02:00 • committed by GitHub
parent 82481e88d7
commit d3fef8392e
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6 changed files with 245 additions and 26 deletions
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9
src/examples/mod.rs
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@ -296,11 +296,12 @@ pub fn great_boy_pod_builder(
Ok(great_boy)
}
pub fn great_boy_pod_full_flow() -> Result<MainPodBuilder> {
pub fn great_boy_pod_full_flow() -> Result<(Params, MainPodBuilder)> {
let params = Params {
max_input_signed_pods: 6,
max_statements: 100,
max_public_statements: 50,
num_public_statements_id: 50,
..Default::default()
};
@ -349,7 +350,7 @@ pub fn great_boy_pod_full_flow() -> Result<MainPodBuilder> {
good_boy_issuers.into_iter().map(Value::from).collect(),
)?);
great_boy_pod_builder(
let builder = great_boy_pod_builder(
&params,
[
&bob_good_boys[0],
@ -360,7 +361,9 @@ pub fn great_boy_pod_full_flow() -> Result<MainPodBuilder> {
[&alice_friend_pods[0], &alice_friend_pods[1]],
&good_boy_issuers,
alice,
)
)?;
Ok((params, builder))
}
// Tickets