feat: Use SP1 prover directly #413
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Removes the PrimeField32 bound where unnecessary
This impacts mainly long computations with a lot of sharding (see lair_shard_test) and large matrices, or large lair programs
After SP1 v4, the global lookup argument for cross-shard chip communication was drastically redesigned, which means our currently implementation is temporarily broken. See #437. The proper solution will require a proper design for sharded Lurk computation. This commit also removes all of the now-unnecessary dummy chips, since only single-shard computations can be proven right now.
winston-h-zhang
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Mar 18, 2025
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@wwared There seem to be minimal deep changes other than removing sphinx stuff and using Arc. This looks good to me!
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This PR entirely removes all Sphinx dependencies and replaces them with their respective SP1 counterparts, using the latest version published to
crates.io.Because of performance-oriented changes in SP1 v4, the lookup argument for cross-shard communication was redesigned, and our current implementation now only works in a single shard temporarily. A workaround is possible, but was not implemented to minimize complexity (see #437). The impact is only for long computations, and those already had other underlying issues, that this PR does not aim to fix.
As a result to this, there might be a regression in our test runtimes or benchmarks, but everything else should still be mostly the same.
The plonky3 crates are using released versions, except for
p3-poseidon2, which is using a slightly patched branch in https://github.com/lurk-lab/p3/tree/sp1-v4