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Integrate recursion into MainPod (#243)

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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)))`

* add time feature and disable timing by default

* apply suggestions from @arnaucube

* link issues in todos
This commit is contained in:
Eduard S. 2025-05-29 17:10:19 +02:00 • committed by GitHub
parent d3fef8392e
commit 88a75986b8
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23 changed files with 1405 additions and 729 deletions
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10
src/frontend/mod.rs
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@ -10,7 +10,8 @@ use serialization::{SerializedMainPod, SerializedSignedPod};
use crate::middleware::{
self, check_st_tmpl, hash_str, hash_values, AnchoredKey, Hash, Key, MainPodInputs,
NativeOperation, NativePredicate, OperationAux, OperationType, Params, PodId, PodProver,
PodSigner, Predicate, Statement, StatementArg, Value, WildcardValue, KEY_TYPE, SELF,
PodSigner, Predicate, Statement, StatementArg, Value, WildcardValue, EMPTY_HASH, KEY_TYPE,
SELF,
};
mod custom;
@ -553,7 +554,7 @@ impl MainPodBuilder {
.iter()
.map(|p| p.pod.as_ref())
.collect_vec(),
main_pods: &self
recursive_pods: &self
.input_main_pods
.iter()
.map(|p| p.pod.as_ref())
@ -561,6 +562,7 @@ impl MainPodBuilder {
statements: &statements,
operations: &operations,
public_statements: &public_statements,
vds_root: EMPTY_HASH, // TODO https://github.com/0xPARC/pod2/issues/249
};
let pod = prover.prove(&self.params, inputs)?;
@ -618,7 +620,7 @@ impl MainPodBuilder {
#[derive(Debug, Clone, Serialize, Deserialize)]
#[serde(try_from = "SerializedMainPod", into = "SerializedMainPod")]
pub struct MainPod {
pub pod: Box<dyn middleware::Pod>,
pub pod: Box<dyn middleware::RecursivePod>,
pub public_statements: Vec<Statement>,
pub params: Params,
}
@ -898,7 +900,7 @@ pub mod tests {
fn test_ethdos() -> Result<()> {
let params = Params {
max_input_signed_pods: 3,
max_input_main_pods: 3,
max_input_recursive_pods: 3,
max_statements: 31,
max_signed_pod_values: 8,
max_public_statements: 10,