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feat: solidity honk verifier (#5485)
This PR introduces a Honk Verifier for 3 different types of circuit. - The logic in each circuit is duplicated as (at the time of writing) solidity does not allow for generic data structures, so as the constants (LOG_N) are different, then each transcript needs to compile with a new log_n value. - In follow up prs i will adjust the tests to run against acir artifacts, where we will codegen the verifier, so i can remove all but the basic case in this test suite Note: this is not an optimal impl, that will follow As this uses padded proofs, in which N is 2^28, the proof verification cost has shot up to 1 793 675.
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18 changes: 17 additions & 1 deletion
18
barretenberg/cpp/src/barretenberg/solidity_helpers/CMakeLists.txt
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90 changes: 90 additions & 0 deletions
90
barretenberg/cpp/src/barretenberg/solidity_helpers/honk_key_gen.cpp
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| #include <iostream> | ||
| #include <memory> | ||
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| #include "barretenberg/stdlib_circuit_builders/ultra_circuit_builder.hpp" | ||
| #include "barretenberg/ultra_honk/ultra_prover.hpp" | ||
| #include "barretenberg/ultra_honk/ultra_verifier.hpp" | ||
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| #include "./honk_sol_gen.hpp" | ||
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| #include "circuits/add_2_circuit.hpp" | ||
| #include "circuits/blake_circuit.hpp" | ||
| #include "circuits/ecdsa_circuit.hpp" | ||
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| using namespace bb; | ||
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| using ProverInstance = ProverInstance_<UltraKeccakFlavor>; | ||
| using VerificationKey = UltraKeccakFlavor::VerificationKey; | ||
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| template <template <typename> typename Circuit> | ||
| void generate_keys_honk(std::string output_path, std::string flavour_prefix, std::string circuit_name) | ||
| { | ||
| uint256_t public_inputs[4] = { 0, 0, 0, 0 }; | ||
| UltraCircuitBuilder builder = Circuit<UltraCircuitBuilder>::generate(public_inputs); | ||
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| auto instance = std::make_shared<ProverInstance>(builder); | ||
| UltraKeccakProver prover(instance); | ||
| auto verification_key = std::make_shared<VerificationKey>(instance->proving_key); | ||
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| // Make verification key file upper case | ||
| circuit_name.at(0) = static_cast<char>(std::toupper(static_cast<unsigned char>(circuit_name.at(0)))); | ||
| flavour_prefix.at(0) = static_cast<char>(std::toupper(static_cast<unsigned char>(flavour_prefix.at(0)))); | ||
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| std::string vk_class_name = circuit_name + flavour_prefix + "VerificationKey"; | ||
| std::string base_class_name = "Base" + flavour_prefix + "Verifier"; | ||
| std::string instance_class_name = circuit_name + flavour_prefix + "Verifier"; | ||
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| { | ||
| auto vk_filename = output_path + "/keys/" + vk_class_name + ".sol"; | ||
| std::ofstream os(vk_filename); | ||
| bb::output_vk_sol_ultra_honk(os, verification_key, vk_class_name); | ||
| info("VK contract written to: ", vk_filename); | ||
| } | ||
| } | ||
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| /* | ||
| * @brief Main entry point for the verification key generator | ||
| * | ||
| * 1. project_root_path: path to the solidity project root | ||
| * 2. srs_path: path to the srs db | ||
| */ | ||
| int main(int argc, char** argv) | ||
| { | ||
| std::vector<std::string> args(argv, argv + argc); | ||
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| if (args.size() < 5) { | ||
| info("usage: ", args[0], "[plonk flavour] [circuit flavour] [output path] [srs path]"); | ||
| return 1; | ||
| } | ||
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| const std::string plonk_flavour = args[1]; | ||
| const std::string circuit_flavour = args[2]; | ||
| const std::string output_path = args[3]; | ||
| const std::string srs_path = args[4]; | ||
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| bb::srs::init_crs_factory(srs_path); | ||
| // @todo - Add support for unrolled standard verifier. Needs a new solidity verifier contract. | ||
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| if (plonk_flavour != "honk") { | ||
| info("honk"); | ||
| return 1; | ||
| } | ||
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| info("Generating ", plonk_flavour, " keys for ", circuit_flavour, " circuit"); | ||
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| if (plonk_flavour == "honk") { | ||
| if (circuit_flavour == "add2") { | ||
| generate_keys_honk<Add2Circuit>(output_path, plonk_flavour, circuit_flavour); | ||
| } else if (circuit_flavour == "blake") { | ||
| generate_keys_honk<BlakeCircuit>(output_path, plonk_flavour, circuit_flavour); | ||
| } else if (circuit_flavour == "ecdsa") { | ||
| generate_keys_honk<bb::EcdsaCircuit>(output_path, plonk_flavour, circuit_flavour); | ||
| // TODO: recursive proofs | ||
| } else { | ||
| info("Unsupported circuit"); | ||
| return 1; | ||
| } | ||
| } | ||
| return 0; | ||
| } // namespace bb |
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105
barretenberg/cpp/src/barretenberg/solidity_helpers/honk_proof_gen.cpp
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| #include "barretenberg/honk/proof_system/types/proof.hpp" | ||
| #include "barretenberg/stdlib_circuit_builders/ultra_circuit_builder.hpp" | ||
| #include "barretenberg/ultra_honk/ultra_prover.hpp" | ||
| #include "barretenberg/ultra_honk/ultra_verifier.hpp" | ||
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| #include "circuits/add_2_circuit.hpp" | ||
| #include "circuits/blake_circuit.hpp" | ||
| #include "circuits/ecdsa_circuit.hpp" | ||
| #include "utils/utils.hpp" | ||
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| #include <iostream> | ||
| #include <sstream> | ||
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| using namespace bb; | ||
| using numeric::uint256_t; | ||
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| using ProverInstance = ProverInstance_<UltraKeccakFlavor>; | ||
| using VerificationKey = UltraKeccakFlavor::VerificationKey; | ||
| using Prover = UltraKeccakProver; | ||
| using Verifier = UltraKeccakVerifier; | ||
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| template <template <typename> typename Circuit> void generate_proof(uint256_t inputs[]) | ||
| { | ||
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| UltraCircuitBuilder builder = Circuit<UltraCircuitBuilder>::generate(inputs); | ||
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| auto instance = std::make_shared<ProverInstance>(builder); | ||
| Prover prover(instance); | ||
| auto verification_key = std::make_shared<VerificationKey>(instance->proving_key); | ||
| Verifier verifier(verification_key); | ||
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| HonkProof proof = prover.construct_proof(); | ||
| { | ||
| if (!verifier.verify_proof(proof)) { | ||
| throw_or_abort("Verification failed"); | ||
| } | ||
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| std::vector<uint8_t> proof_bytes = to_buffer(proof); | ||
| std::string p = bytes_to_hex_string(proof_bytes); | ||
| std::cout << p; | ||
| } | ||
| } | ||
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| std::string pad_left(std::string input, size_t length) | ||
| { | ||
| return std::string(length - std::min(length, input.length()), '0') + input; | ||
| } | ||
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| /** | ||
| * @brief Main entry point for the proof generator. | ||
| * Expected inputs: | ||
| * 1. plonk_flavour: ultra | ||
| * 2. circuit_flavour: blake, add2 | ||
| * 3. public_inputs: comma separated list of public inputs | ||
| * 4. project_root_path: path to the solidity project root | ||
| * 5. srs_path: path to the srs db | ||
| */ | ||
| int main(int argc, char** argv) | ||
| { | ||
| std::vector<std::string> args(argv, argv + argc); | ||
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| if (args.size() < 5) { | ||
| info("usage: ", args[0], "[plonk flavour] [circuit flavour] [srs path] [public inputs]"); | ||
| return 1; | ||
| } | ||
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| const std::string plonk_flavour = args[1]; | ||
| const std::string circuit_flavour = args[2]; | ||
| const std::string srs_path = args[3]; | ||
| const std::string string_input = args[4]; | ||
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| bb::srs::init_crs_factory(srs_path); | ||
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| // @todo dynamically allocate this | ||
| uint256_t inputs[] = { 0, 0, 0, 0, 0, 0 }; | ||
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| size_t count = 0; | ||
| std::stringstream s_stream(string_input); | ||
| while (s_stream.good()) { | ||
| std::string sub; | ||
| getline(s_stream, sub, ','); | ||
| if (sub.substr(0, 2) == "0x") { | ||
| sub = sub.substr(2); | ||
| } | ||
| std::string padded = pad_left(sub, 64); | ||
| inputs[count++] = uint256_t(padded); | ||
| } | ||
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| if (plonk_flavour != "honk") { | ||
| info("Only honk flavor allowed"); | ||
| return 1; | ||
| } | ||
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| if (circuit_flavour == "blake") { | ||
| generate_proof<BlakeCircuit>(inputs); | ||
| } else if (circuit_flavour == "add2") { | ||
| generate_proof<Add2Circuit>(inputs); | ||
| } else if (circuit_flavour == "ecdsa") { | ||
| generate_proof<EcdsaCircuit>(inputs); | ||
| } else { | ||
| info("Invalid circuit flavour: " + circuit_flavour); | ||
| return 1; | ||
| } | ||
| } |
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