Resolve https://github.com/0xPARC/pod2/issues/466 Now batches are identified by the root of a merkle tree that contains all the predicates (using sequential indices as keys). This means that the format to identify a custom predicate reference is still a hash + index, but the calculation of the hash is different. The MainPod circuit now isn't limited by number of batches but instead number of custom predicates; and for each one we verify a merkle proof to verify the batch id. I've removed a bunch of tests from lang that were testing splitting into multiple batches because there's no longer any need for that. In a future PR we'll remove the code that handles batch splitting. Each custom predicate needs 148.2 gates (which is very close to my estimate of 142.7 in https://github.com/0xPARC/pod2/issues/466#issuecomment-3823531286 where I actually made a mistake and considered 5 predicates per batch instead of 4 in the previous Params). |
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