8438d23937
* Tree of scopes
This is an extension of the context concept.
Earlier I was planning to store a simple stack of contexts, but I ended up storing the whole history, in a tree structure. This gives us more control over the output, i.e. we can print the gate count of a parent scope before those of its child scopes, which seems more user-friendly.
Sample gate count output:
[2021-07-19T18:09:24Z INFO plonky2::circuit_builder] 27829 gates to root
[2021-07-19T18:09:24Z INFO plonky2::circuit_builder] | 2373 gates to evaluate the vanishing polynomial at our challenge point, zeta.
[2021-07-19T18:09:24Z INFO plonky2::circuit_builder] | | 1284 gates to evaluate gate constraints
[2021-07-19T18:09:24Z INFO plonky2::circuit_builder] | 25312 gates to verify FRI proof
[2021-07-19T18:09:24Z INFO plonky2::circuit_builder] | | 650 gates to verify 0'th FRI query
[2021-07-19T18:09:24Z INFO plonky2::circuit_builder] | | | 96 gates to check FRI initial proof
[2021-07-19T18:09:24Z INFO plonky2::circuit_builder] | | | 65 gates to compute x from its index
[2021-07-19T18:09:24Z INFO plonky2::circuit_builder] | | | 233 gates to combine initial oracles
...
Sample copy constraint failure:
Error: Copy constraint 'root > verify FRI proof > verify 0'th FRI query > check FRI initial proof > verify 0'th initial Merkle proof > check Merkle root: 0-th hash element' between wire 12 of gate #2550 [...] and wire 0 of gate #0 [...] is not satisfied. Got values of 6861386743364621393 and 0 respectively.
* No min
* info -> debug
* Move to its own file
plonky2
plonky2 is an implementation of recursive arguments based on Plonk and FRI. It uses FRI to check systems of polynomial constraints, similar to the DEEP-ALI method described in the DEEP-FRI paper. It is the successor of plonky, which was based on Plonk and Halo.
plonky2 is largely focused on recursion performance. We use custom gates to mitigate the bottlenecks of FRI verification, such as hashing and interpolation. We also encode witness data in a ~64 bit field, so field operations take just a few cycles. To achieve 128-bit security, we repeat certain checks, and run certain parts of the argument in an extension field.
Running
To run the recursion benchmark,
RUSTFLAGS=-Ctarget-cpu=native cargo run --release
Disclaimer
This code has not been thoroughly reviewed or tested, and should not be used in any production systems.
License
Licensed under either of
- Apache License, Version 2.0 (LICENSE-APACHE or http://www.apache.org/licenses/LICENSE-2.0)
- MIT license (LICENSE-MIT or http://opensource.org/licenses/MIT)
at your option.
Contribution
Unless you explicitly state otherwise, any contribution intentionally submitted for inclusion in the work by you, as defined in the Apache-2.0 license, shall be dual licensed as above, without any additional terms or conditions.