feat(trezor): add HF15 support, BP+

- BP+ support added for Trezor
- old Trezor firmware version support removed, code cleanup

2 files changed, 127 insertions, 143 deletions

diff --git a/src/device_trezor/trezor/protocol.cpp b/src/device_trezor/trezor/protocol.cpp
index a400e82c7..0e59a16ba 100644
--- a/src/device_trezor/trezor/protocol.cpp
+++ b/src/device_trezor/trezor/protocol.cpp
@@ -38,6 +38,7 @@
 #include <crypto/hmac-keccak.h>
 #include <ringct/rctSigs.h>
 #include <ringct/bulletproofs.h>
+#include <ringct/bulletproofs_plus.h>
 #include "cryptonote_config.h"
 #include <sodium.h>
 #include <sodium/crypto_verify_32.h>
@@ -145,8 +146,7 @@ namespace ki {
 
   bool key_image_data(wallet_shim * wallet,
                       const std::vector<tools::wallet2::transfer_details> & transfers,
-                      std::vector<MoneroTransferDetails> & res,
-                      bool need_all_additionals)
+                      std::vector<MoneroTransferDetails> & res)
   {
     for(auto & td : transfers){
       ::crypto::public_key tx_pub_key = wallet->get_tx_pub_key_from_received_outs(td);
@@ -159,11 +159,7 @@ namespace ki {
       cres.set_internal_output_index(td.m_internal_output_index);
       cres.set_sub_addr_major(td.m_subaddr_index.major);
       cres.set_sub_addr_minor(td.m_subaddr_index.minor);
-      if (need_all_additionals) {
-        for (auto &aux : additional_tx_pub_keys) {
-          cres.add_additional_tx_pub_keys(key_to_string(aux));
-        }
-      } else if (!additional_tx_pub_keys.empty() && additional_tx_pub_keys.size() > td.m_internal_output_index) {
+      if (!additional_tx_pub_keys.empty() && additional_tx_pub_keys.size() > td.m_internal_output_index) {
         cres.add_additional_tx_pub_keys(key_to_string(additional_tx_pub_keys[td.m_internal_output_index]));
       }
     }
@@ -194,8 +190,7 @@ namespace ki {
 
   void generate_commitment(std::vector<MoneroTransferDetails> & mtds,
                            const std::vector<tools::wallet2::transfer_details> & transfers,
-                           std::shared_ptr<messages::monero::MoneroKeyImageExportInitRequest> & req,
-                           bool need_subaddr_indices)
+                           std::shared_ptr<messages::monero::MoneroKeyImageExportInitRequest> & req)
   {
     req = std::make_shared<messages::monero::MoneroKeyImageExportInitRequest>();
 
@@ -219,16 +214,6 @@ namespace ki {
       auto & st = search.first->second;
       st.insert(cur.m_subaddr_index.minor);
     }
-
-    if (need_subaddr_indices) {
-      for (auto &x: sub_indices) {
-        auto subs = req->add_subs();
-        subs->set_account(x.first);
-        for (auto minor : x.second) {
-          subs->add_minor_indices(minor);
-        }
-      }
-    }
   }
 
   void live_refresh_ack(const ::crypto::secret_key & view_key_priv,
@@ -399,7 +384,7 @@ namespace tx {
     m_tx_idx = tx_idx;
     m_ct.tx_data = cur_src_tx();
     m_multisig = false;
-    m_client_version = 1;
+    m_client_version = 3;
   }
 
   void Signer::extract_payment_id(){
@@ -474,25 +459,19 @@ namespace tx {
       auto & cur = src.outputs[i];
       auto out = dst->add_outputs();
 
-      if (i == src.real_output || need_ring_indices || client_version() <= 1) {
+      if (i == src.real_output || need_ring_indices) {
         out->set_idx(cur.first);
       }
-      if (i == src.real_output || need_ring_keys || client_version() <= 1) {
+      if (i == src.real_output || need_ring_keys) {
         translate_rct_key(out->mutable_key(), &(cur.second));
       }
     }
 
     dst->set_real_out_tx_key(key_to_string(src.real_out_tx_key));
     dst->set_real_output_in_tx_index(src.real_output_in_tx_index);
-
-    if (client_version() <= 1) {
-      for (auto &cur : src.real_out_additional_tx_keys) {
-        dst->add_real_out_additional_tx_keys(key_to_string(cur));
-      }
-    } else if (!src.real_out_additional_tx_keys.empty()) {
+    if (!src.real_out_additional_tx_keys.empty()) {
       dst->add_real_out_additional_tx_keys(key_to_string(src.real_out_additional_tx_keys.at(src.real_output_in_tx_index)));
     }
-
     dst->set_amount(src.amount);
     dst->set_rct(src.rct);
     dst->set_mask(key_to_string(src.mask));
@@ -532,7 +511,7 @@ namespace tx {
 
     m_ct.tx.version = 2;
     m_ct.tx.unlock_time = tx.unlock_time;
-    m_client_version = (m_aux_data->client_version ? m_aux_data->client_version.get() : 1);
+    m_client_version = (m_aux_data->client_version ? m_aux_data->client_version.get() : 3);
 
     tsx_data.set_version(1);
     tsx_data.set_client_version(client_version());
@@ -543,18 +522,13 @@ namespace tx {
     tsx_data.set_monero_version(std::string(MONERO_VERSION) + "|" + MONERO_VERSION_TAG);
     tsx_data.set_hard_fork(m_aux_data->hard_fork ? m_aux_data->hard_fork.get() : 0);
 
-    if (client_version() <= 1){
-      assign_to_repeatable(tsx_data.mutable_minor_indices(), tx.subaddr_indices.begin(), tx.subaddr_indices.end());
-    }
-
     // Rsig decision
     auto rsig_data = tsx_data.mutable_rsig_data();
     m_ct.rsig_type = get_rsig_type(tx.rct_config, tx.splitted_dsts.size());
     rsig_data->set_rsig_type(m_ct.rsig_type);
-    if (tx.rct_config.range_proof_type != rct::RangeProofBorromean){
-      m_ct.bp_version = (m_aux_data->bp_version ? m_aux_data->bp_version.get() : 1);
-      rsig_data->set_bp_version((uint32_t) m_ct.bp_version);
-    }
+    CHECK_AND_ASSERT_THROW_MES(tx.rct_config.range_proof_type != rct::RangeProofBorromean, "Borromean rsig not supported");
+    m_ct.bp_version = (m_aux_data->bp_version ? m_aux_data->bp_version.get() : 1);
+    rsig_data->set_bp_version((uint32_t) m_ct.bp_version);
 
     generate_rsig_batch_sizes(m_ct.grouping_vct, m_ct.rsig_type, tx.splitted_dsts.size());
     assign_to_repeatable(rsig_data->mutable_grouping(), m_ct.grouping_vct.begin(), m_ct.grouping_vct.end());
@@ -652,22 +626,6 @@ namespace tx {
     });
   }
 
-  std::shared_ptr<messages::monero::MoneroTransactionInputsPermutationRequest> Signer::step_permutation(){
-    sort_ki();
-    if (client_version() >= 2){
-      return nullptr;
-    }
-
-    auto res = std::make_shared<messages::monero::MoneroTransactionInputsPermutationRequest>();
-    assign_to_repeatable(res->mutable_perm(), m_ct.source_permutation.begin(), m_ct.source_permutation.end());
-
-    return res;
-  }
-
-  void Signer::step_permutation_ack(std::shared_ptr<const messages::monero::MoneroTransactionInputsPermutationAck> ack){
-
-  }
-
   std::shared_ptr<messages::monero::MoneroTransactionInputViniRequest> Signer::step_set_vini_input(size_t idx){
     CHECK_AND_ASSERT_THROW_MES(idx < m_ct.tx_data.sources.size(), "Invalid transaction index");
     CHECK_AND_ASSERT_THROW_MES(idx < m_ct.tx.vin.size(), "Invalid transaction index");
@@ -711,8 +669,10 @@ namespace tx {
   }
 
   void Signer::step_set_output_ack(std::shared_ptr<const messages::monero::MoneroTransactionSetOutputAck> ack){
+    CHECK_AND_ASSERT_THROW_MES(is_req_bulletproof(), "Borromean rsig not supported");
     cryptonote::tx_out tx_out;
     rct::Bulletproof bproof{};
+    rct::BulletproofPlus bproof_plus{};
     rct::ctkey out_pk{};
     rct::ecdhTuple ecdh{};
 
@@ -727,7 +687,7 @@ namespace tx {
         rsig_buff = rsig_data.rsig();
       }
 
-      if (client_version() >= 1 && rsig_data.has_mask()){
+      if (rsig_data.has_mask()){
         rct::key cmask{};
         string_to_key(cmask, rsig_data.mask());
         m_ct.rsig_gamma.emplace_back(cmask);
@@ -751,22 +711,32 @@ namespace tx {
       memcpy(ecdh.amount.bytes, ack->ecdh_info().data(), 8);
     }
 
-    if (has_rsig && is_req_bulletproof() && !cn_deserialize(rsig_buff, bproof)){
-      throw exc::ProtocolException("Cannot deserialize bulletproof rangesig");
-    }
-
     m_ct.tx.vout.emplace_back(tx_out);
     m_ct.tx_out_hmacs.push_back(ack->vouti_hmac());
     m_ct.tx_out_pk.emplace_back(out_pk);
     m_ct.tx_out_ecdh.emplace_back(ecdh);
 
-    // ClientV0, if no rsig was generated on Trezor, do not continue.
-    // ClientV1+ generates BP after all masks in the current batch are generated
-    if (!has_rsig || (client_version() >= 1 && is_offloading())){
+    rsig_v bp_obj{};
+    if (has_rsig) {
+      bool deserialize_success;
+      if (is_req_bulletproof_plus()) {
+        deserialize_success = cn_deserialize(rsig_buff, bproof_plus);
+        bp_obj = bproof_plus;
+      } else {
+        deserialize_success = cn_deserialize(rsig_buff, bproof);
+        bp_obj = bproof;
+      }
+      if (!deserialize_success) {
+        throw exc::ProtocolException("Cannot deserialize bulletproof rangesig");
+      }
+    }
+
+    // Generates BP after all masks in the current batch are generated
+    if (!has_rsig || is_offloading()){
       return;
     }
 
-    process_bproof(bproof);
+    process_bproof(bp_obj);
     m_ct.cur_batch_idx += 1;
     m_ct.cur_output_in_batch_idx = 0;
   }
@@ -791,13 +761,21 @@ namespace tx {
       masks.push_back(m_ct.rsig_gamma[bidx]);
     }
 
-    auto bp = bulletproof_PROVE(amounts, masks);
-    auto serRsig = cn_serialize(bp);
-    m_ct.tx_out_rsigs.emplace_back(bp);
+    std::string serRsig;
+    if (is_req_bulletproof_plus()) {
+      auto bp = bulletproof_plus_PROVE(amounts, masks);
+      serRsig = cn_serialize(bp);
+      m_ct.tx_out_rsigs.emplace_back(bp);
+    } else {
+      auto bp = bulletproof_PROVE(amounts, masks);
+      serRsig = cn_serialize(bp);
+      m_ct.tx_out_rsigs.emplace_back(bp);
+    }
+
     rsig_data.set_rsig(serRsig);
   }
 
-  void Signer::process_bproof(rct::Bulletproof & bproof){
+  void Signer::process_bproof(rsig_v & bproof){
     CHECK_AND_ASSERT_THROW_MES(m_ct.cur_batch_idx < m_ct.grouping_vct.size(), "Invalid batch index");
     auto batch_size = m_ct.grouping_vct[m_ct.cur_batch_idx];
     for (size_t i = 0; i < batch_size; ++i){
@@ -806,12 +784,22 @@ namespace tx {
 
       rct::key commitment = m_ct.tx_out_pk[bidx].mask;
       commitment = rct::scalarmultKey(commitment, rct::INV_EIGHT);
-      bproof.V.push_back(commitment);
+      if (is_req_bulletproof_plus()) {
+        boost::get<rct::BulletproofPlus>(bproof).V.push_back(commitment);
+      } else {
+        boost::get<rct::Bulletproof>(bproof).V.push_back(commitment);
+      }
     }
 
     m_ct.tx_out_rsigs.emplace_back(bproof);
-    if (!rct::bulletproof_VERIFY(boost::get<rct::Bulletproof>(m_ct.tx_out_rsigs.back()))) {
-      throw exc::ProtocolException("Returned range signature is invalid");
+    if (is_req_bulletproof_plus()) {
+      if (!rct::bulletproof_plus_VERIFY(boost::get<rct::BulletproofPlus>(m_ct.tx_out_rsigs.back()))) {
+        throw exc::ProtocolException("Returned range signature is invalid");
+      }
+    } else {
+      if (!rct::bulletproof_VERIFY(boost::get<rct::Bulletproof>(m_ct.tx_out_rsigs.back()))) {
+        throw exc::ProtocolException("Returned range signature is invalid");
+      }
     }
   }
 
@@ -840,6 +828,7 @@ namespace tx {
   }
 
   void Signer::step_all_outs_set_ack(std::shared_ptr<const messages::monero::MoneroTransactionAllOutSetAck> ack, hw::device &hwdev){
+    CHECK_AND_ASSERT_THROW_MES(is_req_bulletproof(), "Borromean rsig not supported");
     m_ct.rv = std::make_shared<rct::rctSig>();
     m_ct.rv->txnFee = ack->rv().txn_fee();
     m_ct.rv->type = static_cast<uint8_t>(ack->rv().rv_type());
@@ -864,24 +853,15 @@ namespace tx {
 
     // RctSig
     auto num_sources = m_ct.tx_data.sources.size();
-    if (is_simple() || is_req_bulletproof()){
-      auto dst = &m_ct.rv->pseudoOuts;
-      if (is_bulletproof()){
-        dst = &m_ct.rv->p.pseudoOuts;
-      }
-
-      dst->clear();
-      for (const auto &pseudo_out : m_ct.pseudo_outs) {
-        dst->emplace_back();
-        string_to_key(dst->back(), pseudo_out);
-      }
-
-      m_ct.rv->mixRing.resize(num_sources);
-    } else {
-      m_ct.rv->mixRing.resize(m_ct.tsx_data.mixin());
-      m_ct.rv->mixRing[0].resize(num_sources);
+    auto dst = &m_ct.rv->p.pseudoOuts;
+    dst->clear();
+    for (const auto &pseudo_out : m_ct.pseudo_outs) {
+      dst->emplace_back();
+      string_to_key(dst->back(), pseudo_out);
     }
 
+    m_ct.rv->mixRing.resize(num_sources);
+
     CHECK_AND_ASSERT_THROW_MES(m_ct.tx_out_pk.size() == m_ct.tx_out_ecdh.size(), "Invalid vector sizes");
     for(size_t i = 0; i < m_ct.tx_out_ecdh.size(); ++i){
       m_ct.rv->outPk.push_back(m_ct.tx_out_pk[i]);
@@ -889,10 +869,10 @@ namespace tx {
     }
 
     for(size_t i = 0; i < m_ct.tx_out_rsigs.size(); ++i){
-      if (is_bulletproof()){
-        m_ct.rv->p.bulletproofs.push_back(boost::get<rct::Bulletproof>(m_ct.tx_out_rsigs[i]));
+      if (is_req_bulletproof_plus()) {
+        m_ct.rv->p.bulletproofs_plus.push_back(boost::get<rct::BulletproofPlus>(m_ct.tx_out_rsigs[i]));
       } else {
-        m_ct.rv->p.rangeSigs.push_back(boost::get<rct::rangeSig>(m_ct.tx_out_rsigs[i]));
+        m_ct.rv->p.bulletproofs.push_back(boost::get<rct::Bulletproof>(m_ct.tx_out_rsigs[i]));
       }
     }
 
@@ -936,8 +916,8 @@ namespace tx {
   void Signer::step_sign_input_ack(std::shared_ptr<const messages::monero::MoneroTransactionSignInputAck> ack){
     m_ct.signatures.push_back(ack->signature());
 
-    // Sync updated pseudo_outputs, client_version>=1, HF10+
-    if (client_version() >= 1 && ack->has_pseudo_out()){
+    // Sync updated pseudo_outputs
+    if (ack->has_pseudo_out()){
       CHECK_AND_ASSERT_THROW_MES(m_ct.cur_input_idx < m_ct.pseudo_outs.size(), "Invalid pseudo-out index");
       m_ct.pseudo_outs[m_ct.cur_input_idx] = ack->pseudo_out();
       if (is_bulletproof()){
@@ -955,6 +935,8 @@ namespace tx {
   }
 
   void Signer::step_final_ack(std::shared_ptr<const messages::monero::MoneroTransactionFinalAck> ack){
+    CHECK_AND_ASSERT_THROW_MES(is_clsag(), "Only CLSAGs signatures are supported");
+
     if (m_multisig){
       auto & cout_key = ack->cout_key();
       for(auto & cur : m_ct.couts){
@@ -975,47 +957,34 @@ namespace tx {
     m_ct.enc_keys = ack->tx_enc_keys();
 
     // Opening the sealed signatures
-    if (client_version() >= 3){
-      if(!ack->has_opening_key()){
-        throw exc::ProtocolException("Client version 3+ requires sealed signatures");
-      }
+    if(!ack->has_opening_key()){
+      throw exc::ProtocolException("Client version 3+ requires sealed signatures");
+    }
 
-      for(size_t i = 0; i < m_ct.signatures.size(); ++i){
-        CHECK_AND_ASSERT_THROW_MES(m_ct.signatures[i].size() > crypto::chacha::TAG_SIZE, "Invalid signature size");
-        std::string nonce = compute_sealing_key(ack->opening_key(), i, true);
-        std::string key = compute_sealing_key(ack->opening_key(), i, false);
-        size_t plen = m_ct.signatures[i].size() - crypto::chacha::TAG_SIZE;
-        std::unique_ptr<uint8_t[]> plaintext(new uint8_t[plen]);
-        uint8_t * buff = plaintext.get();
-
-        protocol::crypto::chacha::decrypt(
-            m_ct.signatures[i].data(),
-            m_ct.signatures[i].size(),
-            reinterpret_cast<const uint8_t *>(key.data()),
-            reinterpret_cast<const uint8_t *>(nonce.data()),
-            reinterpret_cast<char *>(buff), &plen);
-        m_ct.signatures[i].assign(reinterpret_cast<const char *>(buff), plen);
-      }
+    for(size_t i = 0; i < m_ct.signatures.size(); ++i){
+      CHECK_AND_ASSERT_THROW_MES(m_ct.signatures[i].size() > crypto::chacha::TAG_SIZE, "Invalid signature size");
+      std::string nonce = compute_sealing_key(ack->opening_key(), i, true);
+      std::string key = compute_sealing_key(ack->opening_key(), i, false);
+      size_t plen = m_ct.signatures[i].size() - crypto::chacha::TAG_SIZE;
+      std::unique_ptr<uint8_t[]> plaintext(new uint8_t[plen]);
+      uint8_t * buff = plaintext.get();
+
+      protocol::crypto::chacha::decrypt(
+          m_ct.signatures[i].data(),
+          m_ct.signatures[i].size(),
+          reinterpret_cast<const uint8_t *>(key.data()),
+          reinterpret_cast<const uint8_t *>(nonce.data()),
+          reinterpret_cast<char *>(buff), &plen);
+      m_ct.signatures[i].assign(reinterpret_cast<const char *>(buff), plen);
     }
 
-    if (m_ct.rv->type == rct::RCTTypeCLSAG){
-      m_ct.rv->p.CLSAGs.reserve(m_ct.signatures.size());
-      for (size_t i = 0; i < m_ct.signatures.size(); ++i) {
-        rct::clsag clsag;
-        if (!cn_deserialize(m_ct.signatures[i], clsag)) {
-          throw exc::ProtocolException("Cannot deserialize clsag[i]");
-        }
-        m_ct.rv->p.CLSAGs.push_back(clsag);
-      }
-    } else {
-      m_ct.rv->p.MGs.reserve(m_ct.signatures.size());
-      for (size_t i = 0; i < m_ct.signatures.size(); ++i) {
-        rct::mgSig mg;
-        if (!cn_deserialize(m_ct.signatures[i], mg)) {
-          throw exc::ProtocolException("Cannot deserialize mg[i]");
-        }
-        m_ct.rv->p.MGs.push_back(mg);
+    m_ct.rv->p.CLSAGs.reserve(m_ct.signatures.size());
+    for (size_t i = 0; i < m_ct.signatures.size(); ++i) {
+      rct::clsag clsag;
+      if (!cn_deserialize(m_ct.signatures[i], clsag)) {
+        throw exc::ProtocolException("Cannot deserialize clsag[i]");
       }
+      m_ct.rv->p.CLSAGs.push_back(clsag);
     }
 
     m_ct.tx.rct_signatures = *(m_ct.rv);
diff --git a/src/device_trezor/trezor/protocol.hpp b/src/device_trezor/trezor/protocol.hpp
index 858db1520..fa8355200 100644
--- a/src/device_trezor/trezor/protocol.hpp
+++ b/src/device_trezor/trezor/protocol.hpp
@@ -116,8 +116,7 @@ namespace ki {
    */
   bool key_image_data(wallet_shim * wallet,
                       const std::vector<tools::wallet2::transfer_details> & transfers,
-                      std::vector<MoneroTransferDetails> & res,
-                      bool need_all_additionals=false);
+                      std::vector<MoneroTransferDetails> & res);
 
   /**
    * Computes a hash over MoneroTransferDetails. Commitment used in the KI sync.
@@ -129,8 +128,7 @@ namespace ki {
    */
   void generate_commitment(std::vector<MoneroTransferDetails> & mtds,
                            const std::vector<tools::wallet2::transfer_details> & transfers,
-                           std::shared_ptr<messages::monero::MoneroKeyImageExportInitRequest> & req,
-                           bool need_subaddr_indices=false);
+                           std::shared_ptr<messages::monero::MoneroKeyImageExportInitRequest> & req);
 
   /**
    * Processes Live refresh step response, parses KI, checks the signature
@@ -166,7 +164,7 @@ namespace tx {
   ::crypto::secret_key compute_enc_key(const ::crypto::secret_key & private_view_key, const std::string & aux, const std::string & salt);
   std::string compute_sealing_key(const std::string & master_key, size_t idx, bool is_iv=false);
 
-  typedef boost::variant<rct::rangeSig, rct::Bulletproof> rsig_v;
+  typedef boost::variant<rct::Bulletproof, rct::BulletproofPlus> rsig_v;
 
   /**
    * Transaction signer state holder.
@@ -247,7 +245,7 @@ namespace tx {
     void compute_integrated_indices(TsxData * tsx_data);
     bool should_compute_bp_now() const;
     void compute_bproof(messages::monero::MoneroTransactionRsigData & rsig_data);
-    void process_bproof(rct::Bulletproof & bproof);
+    void process_bproof(rsig_v & bproof);
     void set_tx_input(MoneroTransactionSourceEntry * dst, size_t idx, bool need_ring_keys=false, bool need_ring_indices=false);
 
   public:
@@ -260,8 +258,6 @@ namespace tx {
     void step_set_input_ack(std::shared_ptr<const messages::monero::MoneroTransactionSetInputAck> ack);
 
     void sort_ki();
-    std::shared_ptr<messages::monero::MoneroTransactionInputsPermutationRequest> step_permutation();
-    void step_permutation_ack(std::shared_ptr<const messages::monero::MoneroTransactionInputsPermutationAck> ack);
 
     std::shared_ptr<messages::monero::MoneroTransactionInputViniRequest> step_set_vini_input(size_t idx);
     void step_set_vini_input_ack(std::shared_ptr<const messages::monero::MoneroTransactionInputViniAck> ack);
@@ -290,11 +286,15 @@ namespace tx {
       return m_client_version;
     }
 
-    bool is_simple() const {
+    uint8_t get_rv_type() const {
       if (!m_ct.rv){
         throw std::invalid_argument("RV not initialized");
       }
-      auto tp = m_ct.rv->type;
+      return m_ct.rv->type;
+    }
+
+    bool is_simple() const {
+      auto tp = get_rv_type();
       return tp == rct::RCTTypeSimple;
     }
 
@@ -302,12 +302,27 @@ namespace tx {
       return m_ct.tx_data.rct_config.range_proof_type != rct::RangeProofBorromean;
     }
 
+    bool is_req_clsag() const {
+      return is_req_bulletproof() && m_ct.tx_data.rct_config.bp_version >= 3;
+    }
+
+    bool is_req_bulletproof_plus() const {
+      return is_req_bulletproof() && m_ct.tx_data.rct_config.bp_version == 4;  // rct::genRctSimple
+    }
+
     bool is_bulletproof() const {
-      if (!m_ct.rv){
-        throw std::invalid_argument("RV not initialized");
-      }
-      auto tp = m_ct.rv->type;
-      return tp == rct::RCTTypeBulletproof || tp == rct::RCTTypeBulletproof2 || tp == rct::RCTTypeCLSAG;
+      auto tp = get_rv_type();
+      return rct::is_rct_bulletproof(tp) || rct::is_rct_bulletproof_plus(tp);
+    }
+
+    bool is_bulletproof_plus() const {
+      auto tp = get_rv_type();
+      return rct::is_rct_bulletproof_plus(tp);
+    }
+
+    bool is_clsag() const {
+      auto tp = get_rv_type();
+      return rct::is_rct_clsag(tp);
     }
 
     bool is_offloading() const {