wownero/tests/unit_tests/carrot_tx_builder.cpp

// Copyright (c) 2025-2026, The Monero Project
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#include "gtest/gtest.h"

#include "carrot_core/enote_utils.h"
#include "carrot_impl/address_device_ram_borrowed.h"
#include "carrot_impl/tx_builder_inputs.h"
#include "carrot_mock_helpers.h"
#include "fcmp_pp/prove.h"

using namespace carrot;

//----------------------------------------------------------------------------------------------------------------------
TEST(carrot_tx_builder, make_sal_proof_legacy_to_legacy_v1_mainaddr)
{
    mock::mock_carrot_and_legacy_keys keys;
    keys.generate(AddressDeriveType::PreCarrot);

    // (K^0_s, K^0_v)
    const CarrotDestinationV1 addr = keys.cryptonote_address();

    const cryptonote_hierarchy_address_device cn_addr_dev(
        std::make_shared<cryptonote_view_incoming_key_ram_borrowed_device>(keys.k_view_incoming_dev),
        addr.address_spend_pubkey);

    const crypto::hash signable_tx_hash = crypto::rand<crypto::hash>();

    // k_e, K_e
    crypto::secret_key enote_ephemeral_privkey;
    crypto::public_key enote_ephemeral_pubkey;
    crypto::generate_keys(enote_ephemeral_pubkey, enote_ephemeral_privkey);

    // 8 k_e K^0_v
    crypto::key_derivation kd;
    ASSERT_TRUE(crypto::generate_key_derivation(addr.address_view_pubkey, enote_ephemeral_privkey, kd));

    // K_o = K^0_s + Hs1(8 k_e K^0_v, i) G
    const std::size_t local_output_index = 2;
    crypto::public_key onetime_address;
    crypto::derive_public_key(kd, local_output_index, addr.address_spend_pubkey, onetime_address);

    // a
    const rct::xmr_amount amount = crypto::rand<rct::xmr_amount>();
    // z
    const crypto::secret_key amount_blinding_factor = mock::gen_secret_key();

    // C_a = z G + a H
    const amount_commitment_t amount_commitment = commit_carrot_amount(amount, amount_blinding_factor);

    const LegacyOutputOpeningHintV1 opening_hint{
        .onetime_address = onetime_address,
        .ephemeral_tx_pubkey = enote_ephemeral_pubkey,
        .subaddr_index = {0, 0},
        .amount = amount,
        .amount_blinding_factor = amount_blinding_factor,
        .local_output_index = local_output_index
    };

    const crypto::key_image expected_key_image = keys.key_image_dev->derive_key_image(opening_hint);

    // fake output amount blinding factor in a hypothetical tx where we spent the aforementioned output
    const crypto::secret_key output_amount_blinding_factor = mock::gen_secret_key();

    // make rerandomized outputs
    std::vector<FcmpRerandomizedOutputCompressed> rerandomized_outputs;
    fcmp_pp::make_balanced_rerandomized_output_set(
        {onetime_address},
        {amount_commitment},
        {true},
        {amount_blinding_factor},
        {mock::gen_secret_key()},
        output_amount_blinding_factor,
        rerandomized_outputs);
    ASSERT_EQ(1, rerandomized_outputs.size());

    // make SA/L proof for spending aforementioned enote
    fcmp_pp::FcmpPpSalProof sal_proof;
    crypto::key_image actual_key_image;
    make_sal_proof_any_to_legacy_v1(signable_tx_hash,
        rerandomized_outputs.front(),
        opening_hint,
        keys.legacy_acb.get_keys().m_spend_secret_key,
        cn_addr_dev,
        sal_proof,
        actual_key_image);

    ASSERT_EQ(expected_key_image, actual_key_image);

    // verify SA/L
    EXPECT_TRUE(fcmp_pp::verify_sal(signable_tx_hash,
        rerandomized_outputs.front().input,
        actual_key_image,
        sal_proof));
}
//----------------------------------------------------------------------------------------------------------------------
TEST(carrot_tx_builder, make_sal_proof_legacy_to_legacy_v1_subaddr)
{
    mock::mock_carrot_and_legacy_keys keys;
    keys.generate(AddressDeriveType::PreCarrot);

    const cryptonote_hierarchy_address_device cn_addr_dev(
        std::make_shared<cryptonote_view_incoming_key_ram_borrowed_device>(keys.k_view_incoming_dev),
        keys.legacy_acb.get_keys().m_account_address.m_spend_public_key);

    // j
    const subaddress_index_extended subaddress_index = mock::gen_subaddress_index_extended(keys.default_derive_type);

    // (K^j_s, K^j_v)
    const CarrotDestinationV1 addr = keys.subaddress(subaddress_index);

    const crypto::hash signable_tx_hash = crypto::rand<crypto::hash>();

    // k_e, K_e = k_e K^j_s
    const crypto::secret_key enote_ephemeral_privkey = mock::gen_secret_key();
    crypto::public_key enote_ephemeral_pubkey;
    {
        ge_p3 Kjs;
        [[maybe_unused]] const int r = ge_frombytes_vartime(&Kjs, to_bytes(addr.address_spend_pubkey));
        ge_p2 Ke;
        ge_scalarmult(&Ke, to_bytes(enote_ephemeral_privkey), &Kjs);
        ge_tobytes(to_bytes(enote_ephemeral_pubkey), &Ke);
    }

    // 8 k_e K^j_v
    crypto::key_derivation kd;
    ASSERT_TRUE(crypto::generate_key_derivation(addr.address_view_pubkey, enote_ephemeral_privkey, kd));

    // K_o = K^j_s + Hs1(8 k_e K^0_v, i) G
    const std::size_t local_output_index = 0;
    crypto::public_key onetime_address;
    crypto::derive_public_key(kd, local_output_index, addr.address_spend_pubkey, onetime_address);

    // a
    const rct::xmr_amount amount = crypto::rand<rct::xmr_amount>();
    // z
    const crypto::secret_key amount_blinding_factor = mock::gen_secret_key();
    // k^g_o
    const crypto::secret_key sender_extension_g = mock::gen_secret_key();

    // C_a = z G + a H
    const amount_commitment_t amount_commitment = commit_carrot_amount(amount, amount_blinding_factor);

    const LegacyOutputOpeningHintV1 opening_hint{
        .onetime_address = onetime_address,
        .ephemeral_tx_pubkey = enote_ephemeral_pubkey,
        .subaddr_index = subaddress_index.index,
        .amount = amount,
        .amount_blinding_factor = amount_blinding_factor,
        .local_output_index = local_output_index
    };

    const bool use_biased_htp = use_biased_hash_to_point(opening_hint);

    const crypto::key_image expected_key_image = keys.key_image_dev->derive_key_image(opening_hint);

    // fake output amount blinding factor in a hypothetical tx where we spent the aforementioned output
    const crypto::secret_key output_amount_blinding_factor = mock::gen_secret_key();

    // make rerandomized outputs
    std::vector<FcmpRerandomizedOutputCompressed> rerandomized_outputs;
    fcmp_pp::make_balanced_rerandomized_output_set({opening_hint.onetime_address},
        {amount_commitment},
        {use_biased_htp},
        {amount_blinding_factor},
        {mock::gen_secret_key()},
        {output_amount_blinding_factor},
        rerandomized_outputs);

    ASSERT_EQ(1, rerandomized_outputs.size());

    // make SA/L proof for spending aforementioned enote
    fcmp_pp::FcmpPpSalProof sal_proof;
    crypto::key_image actual_key_image;
    make_sal_proof_any_to_legacy_v1(signable_tx_hash,
        rerandomized_outputs.front(),
        opening_hint,
        keys.legacy_acb.get_keys().m_spend_secret_key,
        cn_addr_dev,
        sal_proof,
        actual_key_image);

    ASSERT_EQ(expected_key_image, actual_key_image);

    // verify SA/L
    EXPECT_TRUE(fcmp_pp::verify_sal(signable_tx_hash,
        rerandomized_outputs.front().input,
        actual_key_image,
        sal_proof));
}
//----------------------------------------------------------------------------------------------------------------------
TEST(carrot_tx_builder, make_sal_proof_carrot_to_legacy_v1_mainaddr_normal)
{
    mock::mock_carrot_and_legacy_keys keys;
    keys.generate(AddressDeriveType::PreCarrot);

    const cryptonote_hierarchy_address_device cn_addr_dev(
        std::make_shared<cryptonote_view_incoming_key_ram_borrowed_device>(keys.k_view_incoming_dev),
        keys.legacy_acb.get_keys().m_account_address.m_spend_public_key);

    // (K^0_s, K^0_v)
    const CarrotDestinationV1 addr = keys.cryptonote_address();

    const crypto::key_image tx_first_key_image = mock::gen_key_image();

    const CarrotPaymentProposalV1 normal_payment_proposal{
        .destination = addr,
        .amount = crypto::rand<rct::xmr_amount>(),
        .randomness = gen_janus_anchor()
    };

    RCTOutputEnoteProposal output_enote_proposal;
    encrypted_payment_id_t encrypted_payment_id;
    get_output_proposal_normal_v1(normal_payment_proposal,
        tx_first_key_image,
        output_enote_proposal,
        encrypted_payment_id);

    const CarrotEnoteV1 &enote = output_enote_proposal.enote;

    // scan enote to get sender extensions and calculate expected key image
    std::vector<mock::mock_scan_result_t> scan_results;
    mock::mock_scan_enote_set({enote},
        encrypted_payment_id,
        keys,
        scan_results);

    ASSERT_EQ(1, scan_results.size());

    const mock::mock_scan_result_t &scan_result = scan_results.front();

    ASSERT_EQ(addr.address_spend_pubkey, scan_result.address_spend_pubkey);

    const CarrotOutputOpeningHintV1 opening_hint{
        .source_enote = enote,
        .encrypted_payment_id = encrypted_payment_id,
        .subaddr_index = {{0, 0}, keys.default_derive_type}
    };

    const bool use_biased_htp = use_biased_hash_to_point(opening_hint);

    const crypto::key_image expected_key_image = keys.derive_key_image(addr.address_spend_pubkey,
        scan_result.sender_extension_g,
        scan_result.sender_extension_t,
        enote.onetime_address,
        use_biased_htp);

    // fake output amount blinding factor in a hypothetical tx where we spent the aforementioned output
    const crypto::secret_key output_amount_blinding_factor = mock::gen_secret_key();
    const crypto::hash signable_tx_hash = crypto::rand<crypto::hash>();

    // make rerandomized outputs
    std::vector<FcmpRerandomizedOutputCompressed> rerandomized_outputs;
    fcmp_pp::make_balanced_rerandomized_output_set({enote.onetime_address},
        {enote.amount_commitment},
        {use_biased_htp},
        {scan_result.amount_blinding_factor},
        {mock::gen_secret_key()},
        {output_amount_blinding_factor},
        rerandomized_outputs);

    ASSERT_EQ(1, rerandomized_outputs.size());

    // make SA/L proof for spending aforementioned enote
    fcmp_pp::FcmpPpSalProof sal_proof;
    crypto::key_image actual_key_image;
    make_sal_proof_any_to_legacy_v1(signable_tx_hash,
        rerandomized_outputs.front(),
        opening_hint,
        keys.legacy_acb.get_keys().m_spend_secret_key,
        cn_addr_dev,
        sal_proof,
        actual_key_image);

    ASSERT_EQ(expected_key_image, actual_key_image);

    // verify SA/L
    EXPECT_TRUE(fcmp_pp::verify_sal(signable_tx_hash,
        rerandomized_outputs.front().input,
        actual_key_image,
        sal_proof));
}
//----------------------------------------------------------------------------------------------------------------------
TEST(carrot_tx_builder, make_sal_proof_carrot_to_legacy_v1_subaddr_normal)
{
    mock::mock_carrot_and_legacy_keys keys;
    keys.generate(AddressDeriveType::PreCarrot);

    const cryptonote_hierarchy_address_device cn_addr_dev(
        std::make_shared<cryptonote_view_incoming_key_ram_borrowed_device>(keys.k_view_incoming_dev),
        keys.legacy_acb.get_keys().m_account_address.m_spend_public_key);

    // j
    const subaddress_index subaddr_index = mock::gen_subaddress_index();

    // (K^j_s, K^j_v)
    const CarrotDestinationV1 addr = keys.subaddress({subaddr_index});

    const crypto::key_image tx_first_key_image = mock::gen_key_image();

    const CarrotPaymentProposalV1 normal_payment_proposal{
        .destination = addr,
        .amount = crypto::rand<rct::xmr_amount>(),
        .randomness = gen_janus_anchor()
    };

    RCTOutputEnoteProposal output_enote_proposal;
    encrypted_payment_id_t encrypted_payment_id;
    get_output_proposal_normal_v1(normal_payment_proposal,
        tx_first_key_image,
        output_enote_proposal,
        encrypted_payment_id);

    const CarrotEnoteV1 &enote = output_enote_proposal.enote;

    // scan enote to get sender extensions and calculate expected key image
    std::vector<mock::mock_scan_result_t> scan_results;
    mock::mock_scan_enote_set({enote},
        encrypted_payment_id,
        keys,
        scan_results);

    ASSERT_EQ(1, scan_results.size());

    const mock::mock_scan_result_t &scan_result = scan_results.front();

    ASSERT_EQ(addr.address_spend_pubkey, scan_result.address_spend_pubkey);

    const CarrotOutputOpeningHintV1 opening_hint{
        .source_enote = enote,
        .encrypted_payment_id = encrypted_payment_id,
        .subaddr_index = {subaddr_index, keys.default_derive_type}
    };

    const bool use_biased_htp = use_biased_hash_to_point(opening_hint);

    const crypto::key_image expected_key_image = keys.derive_key_image(addr.address_spend_pubkey,
        scan_result.sender_extension_g,
        scan_result.sender_extension_t,
        enote.onetime_address,
        use_biased_htp);

    // fake output amount blinding factor in a hypothetical tx where we spent the aforementioned output
    const crypto::secret_key output_amount_blinding_factor = mock::gen_secret_key();
    const crypto::hash signable_tx_hash = crypto::rand<crypto::hash>();

    // make rerandomized outputs
    std::vector<FcmpRerandomizedOutputCompressed> rerandomized_outputs;
    fcmp_pp::make_balanced_rerandomized_output_set({enote.onetime_address},
        {enote.amount_commitment},
        {use_biased_htp},
        {scan_result.amount_blinding_factor},
        {mock::gen_secret_key()},
        {output_amount_blinding_factor},
        rerandomized_outputs);

    ASSERT_EQ(1, rerandomized_outputs.size());

    // make SA/L proof for spending aforementioned enote
    fcmp_pp::FcmpPpSalProof sal_proof;
    crypto::key_image actual_key_image;
    make_sal_proof_any_to_legacy_v1(signable_tx_hash,
        rerandomized_outputs.front(),
        opening_hint,
        keys.legacy_acb.get_keys().m_spend_secret_key,
        cn_addr_dev,
        sal_proof,
        actual_key_image);

    ASSERT_EQ(expected_key_image, actual_key_image);

    // verify SA/L
    EXPECT_TRUE(fcmp_pp::verify_sal(signable_tx_hash,
        rerandomized_outputs.front().input,
        actual_key_image,
        sal_proof));
}
//----------------------------------------------------------------------------------------------------------------------
TEST(carrot_tx_builder, make_sal_proof_carrot_to_legacy_v1_subaddr_special)
{
    mock::mock_carrot_and_legacy_keys keys;
    keys.generate(AddressDeriveType::PreCarrot);

    const cryptonote_hierarchy_address_device cn_addr_dev(
        std::make_shared<cryptonote_view_incoming_key_ram_borrowed_device>(keys.k_view_incoming_dev),
        keys.legacy_acb.get_keys().m_account_address.m_spend_public_key);

    // j
    const subaddress_index subaddr_index = mock::gen_subaddress_index();

    // (K^j_s, K^j_v)
    const CarrotDestinationV1 addr = keys.subaddress({subaddr_index});

    const crypto::key_image tx_first_key_image = mock::gen_key_image();

    const CarrotPaymentProposalSelfSendV1 selfsend_payment_proposal{
        .destination_address_spend_pubkey = addr.address_spend_pubkey,
        .amount = crypto::rand<rct::xmr_amount>(),
        .enote_type = CarrotEnoteType::CHANGE,
        .enote_ephemeral_privkey = mock::gen_secret_key()
    };

    RCTOutputEnoteProposal output_enote_proposal;
    get_output_proposal_special_v1(selfsend_payment_proposal,
        keys.k_view_incoming_dev,
        tx_first_key_image,
        nullptr,
        nullptr,
        output_enote_proposal);

    const CarrotEnoteV1 &enote = output_enote_proposal.enote;

    // scan enote to get sender extensions and calculate expected key image
    std::vector<mock::mock_scan_result_t> scan_results;
    mock::mock_scan_enote_set({enote},
        gen_encrypted_payment_id(),
        keys,
        scan_results);

    ASSERT_EQ(1, scan_results.size());

    const mock::mock_scan_result_t &scan_result = scan_results.front();

    ASSERT_EQ(addr.address_spend_pubkey, scan_result.address_spend_pubkey);

    const CarrotOutputOpeningHintV1 opening_hint{
        .source_enote = enote,
        .encrypted_payment_id = std::nullopt,
        .subaddr_index = {subaddr_index, keys.default_derive_type}
    };

    const bool use_biased_htp = use_biased_hash_to_point(opening_hint);

    const crypto::key_image expected_key_image = keys.derive_key_image(addr.address_spend_pubkey,
        scan_result.sender_extension_g,
        scan_result.sender_extension_t,
        enote.onetime_address,
        use_biased_htp);

    // fake output amount blinding factor in a hypothetical tx where we spent the aforementioned output
    const crypto::secret_key output_amount_blinding_factor = mock::gen_secret_key();
    const crypto::hash signable_tx_hash = crypto::rand<crypto::hash>();

    // make rerandomized outputs
    std::vector<FcmpRerandomizedOutputCompressed> rerandomized_outputs;
    fcmp_pp::make_balanced_rerandomized_output_set({enote.onetime_address},
        {enote.amount_commitment},
        {use_biased_htp},
        {scan_result.amount_blinding_factor},
        {mock::gen_secret_key()},
        {output_amount_blinding_factor},
        rerandomized_outputs);

    ASSERT_EQ(1, rerandomized_outputs.size());

    // make SA/L proof for spending aforementioned enote
    fcmp_pp::FcmpPpSalProof sal_proof;
    crypto::key_image actual_key_image;
    make_sal_proof_any_to_legacy_v1(signable_tx_hash,
        rerandomized_outputs.front(),
        opening_hint,
        keys.legacy_acb.get_keys().m_spend_secret_key,
        cn_addr_dev,
        sal_proof,
        actual_key_image);

    ASSERT_EQ(expected_key_image, actual_key_image);

    // verify SA/L
    EXPECT_TRUE(fcmp_pp::verify_sal(signable_tx_hash,
        rerandomized_outputs.front().input,
        actual_key_image,
        sal_proof));
}
//----------------------------------------------------------------------------------------------------------------------
TEST(carrot_tx_builder, make_sal_proof_carrot_to_legacy_v1_mainaddr_special)
{
    mock::mock_carrot_and_legacy_keys keys;
    keys.generate(AddressDeriveType::PreCarrot);

    const cryptonote_hierarchy_address_device cn_addr_dev(
        std::make_shared<cryptonote_view_incoming_key_ram_borrowed_device>(keys.k_view_incoming_dev),
        keys.legacy_acb.get_keys().m_account_address.m_spend_public_key);

    // (K^0_s, K^0_v)
    const CarrotDestinationV1 addr = keys.cryptonote_address();

    const crypto::key_image tx_first_key_image = mock::gen_key_image();

    const CarrotPaymentProposalSelfSendV1 selfsend_payment_proposal{
        .destination_address_spend_pubkey = addr.address_spend_pubkey,
        .amount = crypto::rand<rct::xmr_amount>(),
        .enote_type = CarrotEnoteType::CHANGE,
        .enote_ephemeral_privkey = mock::gen_secret_key()
    };

    RCTOutputEnoteProposal output_enote_proposal;
    get_output_proposal_special_v1(selfsend_payment_proposal,
        keys.k_view_incoming_dev,
        tx_first_key_image,
        nullptr,
        nullptr,
        output_enote_proposal);

    const CarrotEnoteV1 &enote = output_enote_proposal.enote;

    // scan enote to get sender extensions and calculate expected key image
    std::vector<mock::mock_scan_result_t> scan_results;
    mock::mock_scan_enote_set({enote},
        gen_encrypted_payment_id(),
        keys,
        scan_results);

    ASSERT_EQ(1, scan_results.size());

    const mock::mock_scan_result_t &scan_result = scan_results.front();

    ASSERT_EQ(addr.address_spend_pubkey, scan_result.address_spend_pubkey);

    const CarrotOutputOpeningHintV1 opening_hint{
        .source_enote = enote,
        .encrypted_payment_id = std::nullopt,
        .subaddr_index = {{0, 0}, keys.default_derive_type}
    };

    const bool use_biased_htp = use_biased_hash_to_point(opening_hint);

    const crypto::key_image expected_key_image = keys.derive_key_image(addr.address_spend_pubkey,
        scan_result.sender_extension_g,
        scan_result.sender_extension_t,
        enote.onetime_address,
        use_biased_htp);

    // fake output amount blinding factor in a hypothetical tx where we spent the aforementioned output
    const crypto::secret_key output_amount_blinding_factor = mock::gen_secret_key();
    const crypto::hash signable_tx_hash = crypto::rand<crypto::hash>();

    // make rerandomized outputs
    std::vector<FcmpRerandomizedOutputCompressed> rerandomized_outputs;
    fcmp_pp::make_balanced_rerandomized_output_set({enote.onetime_address},
        {enote.amount_commitment},
        {use_biased_htp},
        {scan_result.amount_blinding_factor},
        {mock::gen_secret_key()},
        {output_amount_blinding_factor},
        rerandomized_outputs);

    ASSERT_EQ(1, rerandomized_outputs.size());

    // make SA/L proof for spending aforementioned enote
    fcmp_pp::FcmpPpSalProof sal_proof;
    crypto::key_image actual_key_image;
    make_sal_proof_any_to_legacy_v1(signable_tx_hash,
        rerandomized_outputs.front(),
        opening_hint,
        keys.legacy_acb.get_keys().m_spend_secret_key,
        cn_addr_dev,
        sal_proof,
        actual_key_image);

    ASSERT_EQ(expected_key_image, actual_key_image);

    // verify SA/L
    EXPECT_TRUE(fcmp_pp::verify_sal(signable_tx_hash,
        rerandomized_outputs.front().input,
        actual_key_image,
        sal_proof));
}
//----------------------------------------------------------------------------------------------------------------------
TEST(carrot_tx_builder, make_sal_proof_carrot_to_carrot_v1_mainaddr_normal)
{
    mock::mock_carrot_and_legacy_keys keys;
    keys.generate();

    // (K^0_s, K^0_v)
    const CarrotDestinationV1 addr = keys.cryptonote_address();

    const crypto::key_image tx_first_key_image = mock::gen_key_image();

    const CarrotPaymentProposalV1 normal_payment_proposal{
        .destination = addr,
        .amount = crypto::rand<rct::xmr_amount>(),
        .randomness = gen_janus_anchor()
    };

    RCTOutputEnoteProposal output_enote_proposal;
    encrypted_payment_id_t encrypted_payment_id;
    get_output_proposal_normal_v1(normal_payment_proposal,
        tx_first_key_image,
        output_enote_proposal,
        encrypted_payment_id);

    const CarrotEnoteV1 &enote = output_enote_proposal.enote;

    // scan enote to get sender extensions and calculate expected key image
    std::vector<mock::mock_scan_result_t> scan_results;
    mock::mock_scan_enote_set({enote},
        encrypted_payment_id,
        keys,
        scan_results);

    ASSERT_EQ(1, scan_results.size());

    const mock::mock_scan_result_t &scan_result = scan_results.front();

    ASSERT_EQ(addr.address_spend_pubkey, scan_result.address_spend_pubkey);

    const CarrotOutputOpeningHintV1 opening_hint{
        .source_enote = enote,
        .encrypted_payment_id = encrypted_payment_id,
        .subaddr_index = {{0, 0}, keys.default_derive_type}
    };

    const bool use_biased_htp = use_biased_hash_to_point(opening_hint);

    const crypto::key_image expected_key_image = keys.derive_key_image(addr.address_spend_pubkey,
        scan_result.sender_extension_g,
        scan_result.sender_extension_t,
        enote.onetime_address,
        use_biased_htp);

    // fake output amount blinding factor in a hypothetical tx where we spent the aforementioned output
    const crypto::secret_key output_amount_blinding_factor = mock::gen_secret_key();
    const crypto::hash signable_tx_hash = crypto::rand<crypto::hash>();

    // make rerandomized outputs
    std::vector<FcmpRerandomizedOutputCompressed> rerandomized_outputs;
    fcmp_pp::make_balanced_rerandomized_output_set({enote.onetime_address},
        {enote.amount_commitment},
        {use_biased_htp},
        {scan_result.amount_blinding_factor},
        {mock::gen_secret_key()},
        {output_amount_blinding_factor},
        rerandomized_outputs);

    ASSERT_EQ(1, rerandomized_outputs.size());

    // make SA/L proof for spending aforementioned enote
    fcmp_pp::FcmpPpSalProof sal_proof;
    crypto::key_image actual_key_image;
    make_sal_proof_any_to_carrot_v1(signable_tx_hash,
        rerandomized_outputs.front(),
        opening_hint,
        keys.k_prove_spend,
        keys.k_generate_image,
        *keys.addr_dev,
        keys.s_view_balance_dev,
        keys.k_view_incoming_dev,
        sal_proof,
        actual_key_image);

    ASSERT_EQ(expected_key_image, actual_key_image);

    // verify SA/L
    EXPECT_TRUE(fcmp_pp::verify_sal(signable_tx_hash,
        rerandomized_outputs.front().input,
        actual_key_image,
        sal_proof));
}
//----------------------------------------------------------------------------------------------------------------------
TEST(carrot_tx_builder, make_sal_proof_carrot_to_carrot_v1_subaddr_normal)
{
    mock::mock_carrot_and_legacy_keys keys;
    keys.generate();

    // j
    const subaddress_index subaddr_index = mock::gen_subaddress_index();

    // (K^j_s, K^j_v)
    const CarrotDestinationV1 addr = keys.subaddress({subaddr_index});

    const crypto::key_image tx_first_key_image = mock::gen_key_image();

    const CarrotPaymentProposalV1 normal_payment_proposal{
        .destination = addr,
        .amount = crypto::rand<rct::xmr_amount>(),
        .randomness = gen_janus_anchor()
    };

    RCTOutputEnoteProposal output_enote_proposal;
    encrypted_payment_id_t encrypted_payment_id;
    get_output_proposal_normal_v1(normal_payment_proposal,
        tx_first_key_image,
        output_enote_proposal,
        encrypted_payment_id);

    const CarrotEnoteV1 &enote = output_enote_proposal.enote;

    // scan enote to get sender extensions and calculate expected key image
    std::vector<mock::mock_scan_result_t> scan_results;
    mock::mock_scan_enote_set({enote},
        encrypted_payment_id,
        keys,
        scan_results);

    ASSERT_EQ(1, scan_results.size());

    const mock::mock_scan_result_t &scan_result = scan_results.front();

    ASSERT_EQ(addr.address_spend_pubkey, scan_result.address_spend_pubkey);

    const CarrotOutputOpeningHintV1 opening_hint{
        .source_enote = enote,
        .encrypted_payment_id = encrypted_payment_id,
        .subaddr_index = {subaddr_index, keys.default_derive_type}
    };

    const bool use_biased_htp = use_biased_hash_to_point(opening_hint);

    const crypto::key_image expected_key_image = keys.derive_key_image(addr.address_spend_pubkey,
        scan_result.sender_extension_g,
        scan_result.sender_extension_t,
        enote.onetime_address,
        use_biased_htp);

    // fake output amount blinding factor in a hypothetical tx where we spent the aforementioned output
    const crypto::secret_key output_amount_blinding_factor = mock::gen_secret_key();
    const crypto::hash signable_tx_hash = crypto::rand<crypto::hash>();

    // make rerandomized outputs
    std::vector<FcmpRerandomizedOutputCompressed> rerandomized_outputs;
    fcmp_pp::make_balanced_rerandomized_output_set({enote.onetime_address},
        {enote.amount_commitment},
        {use_biased_htp},
        {scan_result.amount_blinding_factor},
        {mock::gen_secret_key()},
        {output_amount_blinding_factor},
        rerandomized_outputs);

    ASSERT_EQ(1, rerandomized_outputs.size());

    // make SA/L proof for spending aforementioned enote
    fcmp_pp::FcmpPpSalProof sal_proof;
    crypto::key_image actual_key_image;
    make_sal_proof_any_to_carrot_v1(signable_tx_hash,
        rerandomized_outputs.front(),
        opening_hint,
        keys.k_prove_spend,
        keys.k_generate_image,
        *keys.addr_dev,
        keys.s_view_balance_dev,
        keys.k_view_incoming_dev,
        sal_proof,
        actual_key_image);

    ASSERT_EQ(expected_key_image, actual_key_image);

    // verify SA/L
    EXPECT_TRUE(fcmp_pp::verify_sal(signable_tx_hash,
        rerandomized_outputs.front().input,
        actual_key_image,
        sal_proof));
}
//----------------------------------------------------------------------------------------------------------------------
TEST(carrot_tx_builder, make_sal_proof_carrot_to_carrot_v1_mainaddr_special)
{
    mock::mock_carrot_and_legacy_keys keys;
    keys.generate();

    // (K^0_s, K^0_v)
    const CarrotDestinationV1 addr = keys.cryptonote_address();

    const crypto::key_image tx_first_key_image = mock::gen_key_image();

    const CarrotPaymentProposalSelfSendV1 selfsend_payment_proposal{
        .destination_address_spend_pubkey = addr.address_spend_pubkey,
        .amount = crypto::rand<rct::xmr_amount>(),
        .enote_type = CarrotEnoteType::PAYMENT,
        .enote_ephemeral_privkey = mock::gen_secret_key()
    };

    RCTOutputEnoteProposal output_enote_proposal;
    get_output_proposal_special_v1(selfsend_payment_proposal,
        keys.k_view_incoming_dev,
        tx_first_key_image,
        nullptr,
        nullptr,
        output_enote_proposal);

    const CarrotEnoteV1 &enote = output_enote_proposal.enote;

    // scan enote to get sender extensions and calculate expected key image
    std::vector<mock::mock_scan_result_t> scan_results;
    mock::mock_scan_enote_set({enote},
        gen_encrypted_payment_id(),
        keys,
        scan_results);

    ASSERT_EQ(1, scan_results.size());

    const mock::mock_scan_result_t &scan_result = scan_results.front();

    ASSERT_EQ(addr.address_spend_pubkey, scan_result.address_spend_pubkey);

    const CarrotOutputOpeningHintV1 opening_hint{
        .source_enote = enote,
        .encrypted_payment_id = std::nullopt,
        .subaddr_index = {{0, 0}, keys.default_derive_type}
    };

    const bool use_biased_htp = use_biased_hash_to_point(opening_hint);

    const crypto::key_image expected_key_image = keys.derive_key_image(addr.address_spend_pubkey,
        scan_result.sender_extension_g,
        scan_result.sender_extension_t,
        enote.onetime_address,
        use_biased_htp);

    // fake output amount blinding factor in a hypothetical tx where we spent the aforementioned output
    const crypto::secret_key output_amount_blinding_factor = mock::gen_secret_key();
    const crypto::hash signable_tx_hash = crypto::rand<crypto::hash>();

    // make rerandomized outputs
    std::vector<FcmpRerandomizedOutputCompressed> rerandomized_outputs;
    fcmp_pp::make_balanced_rerandomized_output_set({enote.onetime_address},
        {enote.amount_commitment},
        {use_biased_htp},
        {scan_result.amount_blinding_factor},
        {mock::gen_secret_key()},
        {output_amount_blinding_factor},
        rerandomized_outputs);

    ASSERT_EQ(1, rerandomized_outputs.size());

    // make SA/L proof for spending aforementioned enote
    fcmp_pp::FcmpPpSalProof sal_proof;
    crypto::key_image actual_key_image;
    make_sal_proof_any_to_carrot_v1(signable_tx_hash,
        rerandomized_outputs.front(),
        opening_hint,
        keys.k_prove_spend,
        keys.k_generate_image,
        *keys.addr_dev,
        keys.s_view_balance_dev,
        keys.k_view_incoming_dev,
        sal_proof,
        actual_key_image);

    ASSERT_EQ(expected_key_image, actual_key_image);

    // verify SA/L
    EXPECT_TRUE(fcmp_pp::verify_sal(signable_tx_hash,
        rerandomized_outputs.front().input,
        actual_key_image,
        sal_proof));
}
//----------------------------------------------------------------------------------------------------------------------
TEST(carrot_tx_builder, make_sal_proof_carrot_to_carrot_v1_subaddr_special)
{
    mock::mock_carrot_and_legacy_keys keys;
    keys.generate();

    // j
    const subaddress_index subaddr_index = mock::gen_subaddress_index();

    // (K^j_s, K^j_v)
    const CarrotDestinationV1 addr = keys.subaddress({subaddr_index});

    const crypto::key_image tx_first_key_image = mock::gen_key_image();

    const CarrotPaymentProposalSelfSendV1 selfsend_payment_proposal{
        .destination_address_spend_pubkey = addr.address_spend_pubkey,
        .amount = crypto::rand<rct::xmr_amount>(),
        .enote_type = CarrotEnoteType::CHANGE,
        .enote_ephemeral_privkey = mock::gen_secret_key()
    };

    RCTOutputEnoteProposal output_enote_proposal;
    get_output_proposal_special_v1(selfsend_payment_proposal,
        keys.k_view_incoming_dev,
        tx_first_key_image,
        nullptr,
        nullptr,
        output_enote_proposal);

    const CarrotEnoteV1 &enote = output_enote_proposal.enote;

    // scan enote to get sender extensions and calculate expected key image
    std::vector<mock::mock_scan_result_t> scan_results;
    mock::mock_scan_enote_set({enote},
        gen_encrypted_payment_id(),
        keys,
        scan_results);

    ASSERT_EQ(1, scan_results.size());

    const mock::mock_scan_result_t &scan_result = scan_results.front();

    ASSERT_EQ(addr.address_spend_pubkey, scan_result.address_spend_pubkey);

    const CarrotOutputOpeningHintV1 opening_hint{
        .source_enote = enote,
        .encrypted_payment_id = std::nullopt,
        .subaddr_index = {subaddr_index, keys.default_derive_type}
    };

    const bool use_biased_htp = use_biased_hash_to_point(opening_hint);

    const crypto::key_image expected_key_image = keys.derive_key_image(addr.address_spend_pubkey,
        scan_result.sender_extension_g,
        scan_result.sender_extension_t,
        enote.onetime_address,
        use_biased_htp);

    // fake output amount blinding factor in a hypothetical tx where we spent the aforementioned output
    const crypto::secret_key output_amount_blinding_factor = mock::gen_secret_key();
    const crypto::hash signable_tx_hash = crypto::rand<crypto::hash>();

    // make rerandomized outputs
    std::vector<FcmpRerandomizedOutputCompressed> rerandomized_outputs;
    fcmp_pp::make_balanced_rerandomized_output_set({enote.onetime_address},
        {enote.amount_commitment},
        {use_biased_htp},
        {scan_result.amount_blinding_factor},
        {mock::gen_secret_key()},
        {output_amount_blinding_factor},
        rerandomized_outputs);

    ASSERT_EQ(1, rerandomized_outputs.size());

    // make SA/L proof for spending aforementioned enote
    fcmp_pp::FcmpPpSalProof sal_proof;
    crypto::key_image actual_key_image;
    make_sal_proof_any_to_carrot_v1(signable_tx_hash,
        rerandomized_outputs.front(),
        opening_hint,
        keys.k_prove_spend,
        keys.k_generate_image,
        *keys.addr_dev,
        keys.s_view_balance_dev,
        keys.k_view_incoming_dev,
        sal_proof,
        actual_key_image);

    ASSERT_EQ(expected_key_image, actual_key_image);

    // verify SA/L
    EXPECT_TRUE(fcmp_pp::verify_sal(signable_tx_hash,
        rerandomized_outputs.front().input,
        actual_key_image,
        sal_proof));
}
//----------------------------------------------------------------------------------------------------------------------
TEST(carrot_tx_builder, make_sal_proof_carrot_to_carrot_v1_mainaddr_internal)
{
    mock::mock_carrot_and_legacy_keys keys;
    keys.generate();

    // (K^0_s, K^0_v)
    const CarrotDestinationV1 addr = keys.cryptonote_address();

    const crypto::key_image tx_first_key_image = mock::gen_key_image();

    const CarrotPaymentProposalSelfSendV1 selfsend_payment_proposal{
        .destination_address_spend_pubkey = addr.address_spend_pubkey,
        .amount = crypto::rand<rct::xmr_amount>(),
        .enote_type = CarrotEnoteType::PAYMENT,
        .enote_ephemeral_privkey = mock::gen_secret_key()
    };

    RCTOutputEnoteProposal output_enote_proposal;
    get_output_proposal_internal_v1(selfsend_payment_proposal,
        keys.s_view_balance_dev,
        tx_first_key_image,
        nullptr,
        nullptr,
        output_enote_proposal);

    const CarrotEnoteV1 &enote = output_enote_proposal.enote;

    // scan enote to get sender extensions and calculate expected key image
    std::vector<mock::mock_scan_result_t> scan_results;
    mock::mock_scan_enote_set({enote},
        gen_encrypted_payment_id(),
        keys,
        scan_results);

    ASSERT_EQ(1, scan_results.size());

    const mock::mock_scan_result_t &scan_result = scan_results.front();

    ASSERT_EQ(addr.address_spend_pubkey, scan_result.address_spend_pubkey);

    const CarrotOutputOpeningHintV1 opening_hint{
        .source_enote = enote,
        .encrypted_payment_id = std::nullopt,
        .subaddr_index = {{0, 0}, keys.default_derive_type}
    };

    const bool use_biased_htp = use_biased_hash_to_point(opening_hint);

    const crypto::key_image expected_key_image = keys.derive_key_image(addr.address_spend_pubkey,
        scan_result.sender_extension_g,
        scan_result.sender_extension_t,
        enote.onetime_address,
        use_biased_htp);

    // fake output amount blinding factor in a hypothetical tx where we spent the aforementioned output
    const crypto::secret_key output_amount_blinding_factor = mock::gen_secret_key();
    const crypto::hash signable_tx_hash = crypto::rand<crypto::hash>();

    // make rerandomized outputs
    std::vector<FcmpRerandomizedOutputCompressed> rerandomized_outputs;
    fcmp_pp::make_balanced_rerandomized_output_set({enote.onetime_address},
        {enote.amount_commitment},
        {use_biased_htp},
        {scan_result.amount_blinding_factor},
        {mock::gen_secret_key()},
        {output_amount_blinding_factor},
        rerandomized_outputs);

    ASSERT_EQ(1, rerandomized_outputs.size());

    // make SA/L proof for spending aforementioned enote
    fcmp_pp::FcmpPpSalProof sal_proof;
    crypto::key_image actual_key_image;
    make_sal_proof_any_to_carrot_v1(signable_tx_hash,
        rerandomized_outputs.front(),
        opening_hint,
        keys.k_prove_spend,
        keys.k_generate_image,
        *keys.addr_dev,
        keys.s_view_balance_dev,
        keys.k_view_incoming_dev,
        sal_proof,
        actual_key_image);

    ASSERT_EQ(expected_key_image, actual_key_image);

    // verify SA/L
    EXPECT_TRUE(fcmp_pp::verify_sal(signable_tx_hash,
        rerandomized_outputs.front().input,
        actual_key_image,
        sal_proof));
}
//----------------------------------------------------------------------------------------------------------------------
TEST(carrot_tx_builder, make_sal_proof_carrot_to_carrot_v1_subaddr_internal)
{
    mock::mock_carrot_and_legacy_keys keys;
    keys.generate();

    // j
    const subaddress_index subaddr_index = mock::gen_subaddress_index();

    // (K^j_s, K^j_v)
    const CarrotDestinationV1 addr = keys.subaddress({subaddr_index});

    const crypto::key_image tx_first_key_image = mock::gen_key_image();

    const CarrotPaymentProposalSelfSendV1 selfsend_payment_proposal{
        .destination_address_spend_pubkey = addr.address_spend_pubkey,
        .amount = crypto::rand<rct::xmr_amount>(),
        .enote_type = CarrotEnoteType::CHANGE,
        .enote_ephemeral_privkey = mock::gen_secret_key()
    };

    RCTOutputEnoteProposal output_enote_proposal;
    get_output_proposal_internal_v1(selfsend_payment_proposal,
        keys.s_view_balance_dev,
        tx_first_key_image,
        nullptr,
        nullptr,
        output_enote_proposal);

    const CarrotEnoteV1 &enote = output_enote_proposal.enote;

    // scan enote to get sender extensions and calculate expected key image
    std::vector<mock::mock_scan_result_t> scan_results;
    mock::mock_scan_enote_set({enote},
        gen_encrypted_payment_id(),
        keys,
        scan_results);

    ASSERT_EQ(1, scan_results.size());

    const mock::mock_scan_result_t &scan_result = scan_results.front();

    ASSERT_EQ(addr.address_spend_pubkey, scan_result.address_spend_pubkey);

    const CarrotOutputOpeningHintV1 opening_hint{
        .source_enote = enote,
        .encrypted_payment_id = std::nullopt,
        .subaddr_index = {subaddr_index, keys.default_derive_type}
    };

    const bool use_biased_htp = use_biased_hash_to_point(opening_hint);

    const crypto::key_image expected_key_image = keys.derive_key_image(addr.address_spend_pubkey,
        scan_result.sender_extension_g,
        scan_result.sender_extension_t,
        enote.onetime_address,
        use_biased_htp);

    // fake output amount blinding factor in a hypothetical tx where we spent the aforementioned output
    const crypto::secret_key output_amount_blinding_factor = mock::gen_secret_key();
    const crypto::hash signable_tx_hash = crypto::rand<crypto::hash>();

    // make rerandomized outputs
    std::vector<FcmpRerandomizedOutputCompressed> rerandomized_outputs;
    fcmp_pp::make_balanced_rerandomized_output_set({enote.onetime_address},
        {enote.amount_commitment},
        {use_biased_htp},
        {scan_result.amount_blinding_factor},
        {mock::gen_secret_key()},
        {output_amount_blinding_factor},
        rerandomized_outputs);

    ASSERT_EQ(1, rerandomized_outputs.size());

    // make SA/L proof for spending aforementioned enote
    fcmp_pp::FcmpPpSalProof sal_proof;
    crypto::key_image actual_key_image;
    make_sal_proof_any_to_carrot_v1(signable_tx_hash,
        rerandomized_outputs.front(),
        opening_hint,
        keys.k_prove_spend,
        keys.k_generate_image,
        *keys.addr_dev,
        keys.s_view_balance_dev,
        keys.k_view_incoming_dev,
        sal_proof,
        actual_key_image);

    ASSERT_EQ(expected_key_image, actual_key_image);

    // verify SA/L
    EXPECT_TRUE(fcmp_pp::verify_sal(signable_tx_hash,
        rerandomized_outputs.front().input,
        actual_key_image,
        sal_proof));
}
//----------------------------------------------------------------------------------------------------------------------
TEST(carrot_tx_builder, make_sal_proof_carrot_coinbase_to_legacy_v1)
{
    mock::mock_carrot_and_legacy_keys keys;
    keys.generate(AddressDeriveType::PreCarrot);

    const cryptonote_hierarchy_address_device cn_addr_dev(
        std::make_shared<cryptonote_view_incoming_key_ram_borrowed_device>(keys.k_view_incoming_dev),
        keys.legacy_acb.get_keys().m_account_address.m_spend_public_key);

    // (K^0_s, K^0_v)
    const CarrotDestinationV1 addr = keys.cryptonote_address();

    const CarrotPaymentProposalV1 normal_payment_proposal{
        .destination = addr,
        .amount = crypto::rand<rct::xmr_amount>(),
        .randomness = gen_janus_anchor()
    };

    const uint64_t block_index = mock::gen_block_index();

    CarrotCoinbaseEnoteV1 coinbase_enote;
    get_coinbase_enote_v1(normal_payment_proposal,
        block_index,
        coinbase_enote);
    const amount_commitment_t coinbase_enote_amount_commitment = commit_carrot_amount(coinbase_enote.amount, {{1}});

    // scan enote to get sender extensions and calculate expected key image
    std::vector<mock::mock_scan_result_t> scan_results;
    mock::mock_scan_coinbase_enote_set({coinbase_enote}, keys, scan_results);

    ASSERT_EQ(1, scan_results.size());

    const mock::mock_scan_result_t &scan_result = scan_results.front();

    ASSERT_EQ(addr.address_spend_pubkey, scan_result.address_spend_pubkey);

    const CarrotCoinbaseOutputOpeningHintV1 opening_hint{
        .source_enote = coinbase_enote,
        .derive_type = keys.default_derive_type
    };

    const bool use_biased_htp = use_biased_hash_to_point(opening_hint);

    const crypto::key_image expected_key_image = keys.derive_key_image(addr.address_spend_pubkey,
        scan_result.sender_extension_g,
        scan_result.sender_extension_t,
        coinbase_enote.onetime_address,
        use_biased_htp);

    // fake output amount blinding factor in a hypothetical tx where we spent the aforementioned output
    const crypto::secret_key output_amount_blinding_factor = mock::gen_secret_key();
    const crypto::hash signable_tx_hash = crypto::rand<crypto::hash>();

    // make rerandomized outputs
    std::vector<FcmpRerandomizedOutputCompressed> rerandomized_outputs;
    fcmp_pp::make_balanced_rerandomized_output_set({coinbase_enote.onetime_address},
        {coinbase_enote_amount_commitment},
        {use_biased_htp},
        {scan_result.amount_blinding_factor},
        {mock::gen_secret_key()},
        {output_amount_blinding_factor},
        rerandomized_outputs);

    ASSERT_EQ(1, rerandomized_outputs.size());

    // make SA/L proof for spending aforementioned enote
    fcmp_pp::FcmpPpSalProof sal_proof;
    crypto::key_image actual_key_image;
    make_sal_proof_any_to_legacy_v1(signable_tx_hash,
        rerandomized_outputs.front(),
        opening_hint,
        keys.legacy_acb.get_keys().m_spend_secret_key,
        cn_addr_dev,
        sal_proof,
        actual_key_image);

    ASSERT_EQ(expected_key_image, actual_key_image);

    // verify SA/L
    EXPECT_TRUE(fcmp_pp::verify_sal(signable_tx_hash,
        rerandomized_outputs.front().input,
        actual_key_image,
        sal_proof));
}
//----------------------------------------------------------------------------------------------------------------------
TEST(carrot_tx_builder, make_sal_proof_carrot_coinbase_to_carrot_v1)
{
    mock::mock_carrot_and_legacy_keys keys;
    keys.generate();

    // (K^0_s, K^0_v)
    const CarrotDestinationV1 addr = keys.cryptonote_address();

    const CarrotPaymentProposalV1 normal_payment_proposal{
        .destination = addr,
        .amount = crypto::rand<rct::xmr_amount>(),
        .randomness = gen_janus_anchor()
    };

    const uint64_t block_index = mock::gen_block_index();

    CarrotCoinbaseEnoteV1 coinbase_enote;
    get_coinbase_enote_v1(normal_payment_proposal,
        block_index,
        coinbase_enote);
    const amount_commitment_t coinbase_enote_amount_commitment = commit_carrot_amount(coinbase_enote.amount, {{1}});

    // scan enote to get sender extensions and calculate expected key image
    std::vector<mock::mock_scan_result_t> scan_results;
    mock::mock_scan_coinbase_enote_set({coinbase_enote}, keys, scan_results);

    ASSERT_EQ(1, scan_results.size());

    const mock::mock_scan_result_t &scan_result = scan_results.front();

    ASSERT_EQ(addr.address_spend_pubkey, scan_result.address_spend_pubkey);

    const CarrotCoinbaseOutputOpeningHintV1 opening_hint{
        .source_enote = coinbase_enote,
        .derive_type = keys.default_derive_type
    };

    const bool use_biased_htp = use_biased_hash_to_point(opening_hint);

    const crypto::key_image expected_key_image = keys.derive_key_image(addr.address_spend_pubkey,
        scan_result.sender_extension_g,
        scan_result.sender_extension_t,
        coinbase_enote.onetime_address,
        use_biased_htp);

    // fake output amount blinding factor in a hypothetical tx where we spent the aforementioned output
    const crypto::secret_key output_amount_blinding_factor = mock::gen_secret_key();
    const crypto::hash signable_tx_hash = crypto::rand<crypto::hash>();

    // make rerandomized outputs
    std::vector<FcmpRerandomizedOutputCompressed> rerandomized_outputs;
    fcmp_pp::make_balanced_rerandomized_output_set({coinbase_enote.onetime_address},
        {coinbase_enote_amount_commitment},
        {use_biased_htp},
        {scan_result.amount_blinding_factor},
        {mock::gen_secret_key()},
        {output_amount_blinding_factor},
        rerandomized_outputs);

    ASSERT_EQ(1, rerandomized_outputs.size());

    // make SA/L proof for spending aforementioned enote
    fcmp_pp::FcmpPpSalProof sal_proof;
    crypto::key_image actual_key_image;
    make_sal_proof_any_to_carrot_v1(signable_tx_hash,
        rerandomized_outputs.front(),
        opening_hint,
        keys.k_prove_spend,
        keys.k_generate_image,
        *keys.addr_dev,
        keys.s_view_balance_dev,
        keys.k_view_incoming_dev,
        sal_proof,
        actual_key_image);

    ASSERT_EQ(expected_key_image, actual_key_image);

    // verify SA/L
    EXPECT_TRUE(fcmp_pp::verify_sal(signable_tx_hash,
        rerandomized_outputs.front().input,
        actual_key_image,
        sal_proof));
}
//----------------------------------------------------------------------------------------------------------------------