api_ultra_honk.cpp

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#include "api_ultra_honk.hpp"
 
#include "barretenberg/api/file_io.hpp"
#include "barretenberg/bbapi/bbapi_ultra_honk.hpp"
#include "barretenberg/common/bb_bench.hpp"
#include "barretenberg/common/get_bytecode.hpp"
#include "barretenberg/common/map.hpp"
#include "barretenberg/common/throw_or_abort.hpp"
#include "barretenberg/dsl/acir_format/acir_to_constraint_buf.hpp"
#include "barretenberg/dsl/acir_proofs/honk_contract.hpp"
#include "barretenberg/dsl/acir_proofs/honk_optimized_contract.hpp"
#include "barretenberg/dsl/acir_proofs/honk_zk_contract.hpp"
#include "barretenberg/honk/proof_system/types/proof.hpp"
#include "barretenberg/numeric/uint256/uint256.hpp"
#include "barretenberg/special_public_inputs/special_public_inputs.hpp"
#include "barretenberg/srs/global_crs.hpp"
#include <iomanip>
#include <optional>
#include <sstream>
 
namespace bb {
 
namespace {
 
void write_vk_outputs(const bbapi::CircuitComputeVk::Response& vk_response, const std::filesystem::path& output_dir)
{
    write_file(output_dir / "vk", vk_response.bytes);
    info("VK saved to ", output_dir / "vk");
    write_file(output_dir / "vk_hash", vk_response.hash);
    info("VK Hash saved to ", output_dir / "vk_hash");
}
 
void write_proof_outputs(const bbapi::CircuitProve::Response& prove_response, const std::filesystem::path& output_dir)
{
    auto public_inputs_buf = to_buffer(prove_response.public_inputs);
    auto proof_buf = to_buffer(prove_response.proof);
 
    write_file(output_dir / "public_inputs", public_inputs_buf);
    write_file(output_dir / "proof", proof_buf);
    info("Public inputs saved to ", output_dir / "public_inputs");
    info("Proof saved to ", output_dir / "proof");
}
 
} // anonymous namespace
 
bool UltraHonkAPI::check([[maybe_unused]] const Flags& flags,
                         [[maybe_unused]] const std::filesystem::path& bytecode_path,
                         [[maybe_unused]] const std::filesystem::path& witness_path)
{
    throw_or_abort("API function check_witness not implemented");
    return false;
}
 
void UltraHonkAPI::prove(const Flags& flags,
                         const std::filesystem::path& bytecode_path,
                         const std::filesystem::path& witness_path,
                         const std::filesystem::path& vk_path,
                         const std::filesystem::path& output_dir)
{
    BB_BENCH_NAME("UltraHonkAPI::prove");
    // Validate output directory
    if (output_dir == "-") {
        throw_or_abort("Stdout output is not supported. Please specify an output directory.");
    }
 
    // Convert flags to ProofSystemSettings
    bbapi::ProofSystemSettings settings{ .ipa_accumulation = flags.ipa_accumulation,
                                         .oracle_hash_type = flags.oracle_hash_type,
                                         .disable_zk = flags.disable_zk };
 
    // Read input files
    auto bytecode = get_bytecode(bytecode_path);
    auto witness = get_bytecode(witness_path);
 
    // Handle VK
    std::vector<uint8_t> vk_bytes;
 
    if (!vk_path.empty() && !flags.write_vk) {
        vk_bytes = read_file(vk_path);
    }
 
    // Prove
    auto response = bbapi::CircuitProve{ .circuit = { .name = "circuit",
                                                      .bytecode = std::move(bytecode),
                                                      .verification_key = std::move(vk_bytes) },
                                         .witness = std::move(witness),
                                         .settings = std::move(settings) }
                        .execute();
    write_proof_outputs(response, output_dir);
    if (flags.write_vk) {
        write_vk_outputs(response.vk, output_dir);
    }
}
 
bool UltraHonkAPI::verify(const Flags& flags,
                          const std::filesystem::path& public_inputs_path,
                          const std::filesystem::path& proof_path,
                          const std::filesystem::path& vk_path)
{
    BB_BENCH_NAME("UltraHonkAPI::verify");
    // Read input files
    auto public_inputs = many_from_buffer<uint256_t>(read_file(public_inputs_path));
    auto proof = many_from_buffer<uint256_t>(read_file(proof_path));
    auto vk_bytes = read_vk_file(vk_path);
 
    // Convert flags to ProofSystemSettings
    bbapi::ProofSystemSettings settings{ .ipa_accumulation = flags.ipa_accumulation,
                                         .oracle_hash_type = flags.oracle_hash_type,
                                         .disable_zk = flags.disable_zk };
 
    // Execute verify command
    auto response = bbapi::CircuitVerify{ .verification_key = std::move(vk_bytes),
                                          .public_inputs = std::move(public_inputs),
                                          .proof = std::move(proof),
                                          .settings = settings }
                        .execute();
 
    return response.verified;
}
 
bool UltraHonkAPI::prove_and_verify([[maybe_unused]] const Flags& flags,
                                    [[maybe_unused]] const std::filesystem::path& bytecode_path,
                                    [[maybe_unused]] const std::filesystem::path& witness_path)
{
    throw_or_abort("API function prove_and_verify not implemented");
    return false;
}
 
void UltraHonkAPI::write_vk(const Flags& flags,
                            const std::filesystem::path& bytecode_path,
                            const std::filesystem::path& output_dir)
{
    BB_BENCH_NAME("UltraHonkAPI::write_vk");
    // Validate output directory
    if (output_dir == "-") {
        throw_or_abort("Stdout output is not supported. Please specify an output directory.");
    }
 
    // Read bytecode
    auto bytecode = get_bytecode(bytecode_path);
 
    // Convert flags to ProofSystemSettings
    bbapi::ProofSystemSettings settings{ .ipa_accumulation = flags.ipa_accumulation,
                                         .oracle_hash_type = flags.oracle_hash_type,
                                         .disable_zk = flags.disable_zk };
 
    auto response = bbapi::CircuitComputeVk{ .circuit = { .name = "circuit", .bytecode = std::move(bytecode) },
                                             .settings = settings }
                        .execute();
 
    write_vk_outputs(response, output_dir);
}
 
void UltraHonkAPI::gates([[maybe_unused]] const Flags& flags,
                         [[maybe_unused]] const std::filesystem::path& bytecode_path)
{
    BB_BENCH_NAME("UltraHonkAPI::gates");
    // Get the bytecode directly
    auto bytecode = get_bytecode(bytecode_path);
 
    // All circuit reports will be built into the string below
    std::string functions_string = "{\"functions\": [\n  ";
 
    // For now, treat the entire bytecode as a single circuit
    // TODO(https://github.com/AztecProtocol/barretenberg/issues/1074): Handle multi-circuit programs properly
    // Convert flags to ProofSystemSettings
    bbapi::ProofSystemSettings settings{ .ipa_accumulation = flags.ipa_accumulation,
                                         .oracle_hash_type = flags.oracle_hash_type,
                                         .disable_zk = flags.disable_zk };
 
    // Execute CircuitStats command
    auto response = bbapi::CircuitStats{ .circuit = { .name = "circuit", .bytecode = bytecode, .verification_key = {} },
                                         .include_gates_per_opcode = flags.include_gates_per_opcode,
                                         .settings = settings }
                        .execute();
 
    vinfo("Calculated circuit size in gate_count: ", response.num_gates);
 
    // Build individual circuit report to match original gate_count output
    std::string gates_per_opcode_str;
    if (flags.include_gates_per_opcode) {
        size_t i = 0;
        for (size_t count : response.gates_per_opcode) {
            if (i != 0) {
                gates_per_opcode_str += ",";
            }
            gates_per_opcode_str += std::to_string(count);
            i++;
        }
    }
 
    // For now, we'll use the CircuitStats response which includes circuit statistics
    // The num_acir_opcodes is not directly available from bytecode alone
    auto result_string = format(
        "{\n        \"acir_opcodes\": ",
        response.num_acir_opcodes,
        ",\n        \"circuit_size\": ",
        response.num_gates,
        (flags.include_gates_per_opcode ? format(",\n        \"gates_per_opcode\": [", gates_per_opcode_str, "]") : ""),
        "\n  }");
 
    functions_string = format(functions_string, result_string);
    std::cout << format(functions_string, "\n]}");
}
 
void UltraHonkAPI::write_solidity_verifier(const Flags& flags,
                                           const std::filesystem::path& output_path,
                                           const std::filesystem::path& vk_path)
{
    BB_BENCH_NAME("UltraHonkAPI::write_solidity_verifier");
    // Read VK file
    auto vk_bytes = read_vk_file(vk_path);
 
    // Convert flags to ProofSystemSettings
    bbapi::ProofSystemSettings settings{ .ipa_accumulation = flags.ipa_accumulation,
                                         .oracle_hash_type = flags.oracle_hash_type,
                                         .disable_zk = flags.disable_zk,
                                         .optimized_solidity_verifier = flags.optimized_solidity_verifier };
 
    // Execute solidity verifier command
    auto response = bbapi::CircuitWriteSolidityVerifier{ .verification_key = vk_bytes, .settings = settings }.execute();
 
    // Write output
    if (output_path == "-") {
        std::cout << response.solidity_code;
    } else {
        write_file(output_path, { response.solidity_code.begin(), response.solidity_code.end() });
        if (flags.disable_zk) {
            info("Honk solidity verifier saved to ", output_path);
        } else {
            info("ZK Honk solidity verifier saved to ", output_path);
        }
    }
}
} // namespace bb