diff --git a/barretenberg/cpp/src/barretenberg/client_ivc/client_ivc.cpp b/barretenberg/cpp/src/barretenberg/client_ivc/client_ivc.cpp
index 9119e17f6ea3..9a8add8988f9 100644
--- a/barretenberg/cpp/src/barretenberg/client_ivc/client_ivc.cpp
+++ b/barretenberg/cpp/src/barretenberg/client_ivc/client_ivc.cpp
@@ -176,9 +176,16 @@ void ClientIVC::accumulate(ClientCircuit& circuit, const std::shared_ptr<Verific
         proving_key = std::make_shared<DeciderProvingKey>(circuit, trace_settings);
         trace_usage_tracker = ExecutionTraceUsageTracker(trace_settings);
     } else {
-        proving_key = std::make_shared<DeciderProvingKey>(
-            circuit, trace_settings, fold_output.accumulator->proving_key.commitment_key);
+        proving_key = std::make_shared<DeciderProvingKey>(circuit, trace_settings);
+    }
+
+    if (!bn254_commitment_key) {
+        info("commitment key being initialized");
+        bn254_commitment_key = std::make_shared<typename MegaFlavor::CommitmentKey>(proving_key->dyadic_circuit_size);
+    } else {
+        info("commitment key already initialized");
     }
+    proving_key->proving_key.commitment_key = bn254_commitment_key;
 
     vinfo("getting honk vk... precomputed?: ", precomputed_vk);
     // Update the accumulator trace usage based on the present circuit
@@ -274,11 +281,11 @@ HonkProof ClientIVC::construct_and_prove_hiding_circuit()
 
     builder.add_pairing_point_accumulator(stdlib::recursion::init_default_agg_obj_indices<ClientCircuit>(builder));
 
-    // Construct the last merge proof for the present circuit and add to merge verification queue
+    // Construct the last merge proof for the present circuit and add to merge verification queuee
     MergeProof merge_proof = goblin.prove_merge(builder);
     merge_verification_queue.emplace_back(merge_proof);
 
-    auto decider_pk = std::make_shared<DeciderProvingKey>(builder);
+    auto decider_pk = std::make_shared<DeciderProvingKey>(builder, TraceSettings(), bn254_commitment_key);
     honk_vk = std::make_shared<VerificationKey>(decider_pk->proving_key);
     MegaProver prover(decider_pk);
 
@@ -338,6 +345,7 @@ bool ClientIVC::verify(const Proof& proof)
 HonkProof ClientIVC::decider_prove() const
 {
     vinfo("prove decider...");
+    fold_output.accumulator->proving_key.commitment_key = bn254_commitment_key;
     MegaDeciderProver decider_prover(fold_output.accumulator);
     return decider_prover.construct_proof();
     vinfo("finished decider proving.");
diff --git a/barretenberg/cpp/src/barretenberg/client_ivc/client_ivc.hpp b/barretenberg/cpp/src/barretenberg/client_ivc/client_ivc.hpp
index c1389ed814d9..c0028a791ffa 100644
--- a/barretenberg/cpp/src/barretenberg/client_ivc/client_ivc.hpp
+++ b/barretenberg/cpp/src/barretenberg/client_ivc/client_ivc.hpp
@@ -98,8 +98,6 @@ class ClientIVC {
     using ProverFoldOutput = FoldingResult<Flavor>;
 
   public:
-    GoblinProver goblin;
-
     ProverFoldOutput fold_output; // prover accumulator and fold proof
 
     std::shared_ptr<DeciderVerificationKey> verifier_accumulator; // verifier accumulator
@@ -122,11 +120,19 @@ class ClientIVC {
     // Setting auto_verify_mode = true will cause kernel completion logic to be added to kernels automatically
     bool auto_verify_mode;
 
+    std::shared_ptr<typename MegaFlavor::CommitmentKey> bn254_commitment_key;
+
+    GoblinProver goblin;
+
     bool initialized = false; // Is the IVC accumulator initialized
 
     ClientIVC(TraceSettings trace_settings = {}, bool auto_verify_mode = false)
         : trace_settings(trace_settings)
         , auto_verify_mode(auto_verify_mode)
+        , bn254_commitment_key(trace_settings.structure.has_value()
+                                   ? std::make_shared<CommitmentKey<curve::BN254>>(trace_settings.dyadic_size())
+                                   : nullptr)
+        , goblin(bn254_commitment_key)
     {}
 
     void instantiate_stdlib_verification_queue(
diff --git a/barretenberg/cpp/src/barretenberg/commitment_schemes/commitment_key.hpp b/barretenberg/cpp/src/barretenberg/commitment_schemes/commitment_key.hpp
index 6440c016a627..c7c3d9609583 100644
--- a/barretenberg/cpp/src/barretenberg/commitment_schemes/commitment_key.hpp
+++ b/barretenberg/cpp/src/barretenberg/commitment_schemes/commitment_key.hpp
@@ -69,7 +69,9 @@ template <class Curve> class CommitmentKey {
         : pippenger_runtime_state(get_num_needed_srs_points(num_points))
         , crs_factory(srs::get_crs_factory<Curve>())
         , srs(crs_factory->get_prover_crs(get_num_needed_srs_points(num_points)))
-    {}
+    {
+        info("CommitmentKey constructor from num_points being called!");
+    }
 
     // Note: This constructor is to be used only by Plonk; For Honk the srs lives in the CommitmentKey
     CommitmentKey(const size_t num_points, std::shared_ptr<srs::factories::ProverCrs<Curve>> prover_crs)
diff --git a/barretenberg/cpp/src/barretenberg/dsl/acir_proofs/c_bind.cpp b/barretenberg/cpp/src/barretenberg/dsl/acir_proofs/c_bind.cpp
index 25d4f90d85a6..ba802bcb5a51 100644
--- a/barretenberg/cpp/src/barretenberg/dsl/acir_proofs/c_bind.cpp
+++ b/barretenberg/cpp/src/barretenberg/dsl/acir_proofs/c_bind.cpp
@@ -236,7 +236,7 @@ WASM_EXPORT void acir_prove_and_verify_aztec_client(uint8_t const* acir_stack,
     }
     // TODO(#7371) dedupe this with the rest of the similar code
     // TODO(https://github.com/AztecProtocol/barretenberg/issues/1101): remove use of auto_verify_mode
-    ClientIVC ivc{ { E2E_FULL_TEST_STRUCTURE }, /*auto_verify_mode=*/true };
+    ClientIVC ivc{ { CLIENT_IVC_BENCH_STRUCTURE }, /*auto_verify_mode=*/true };
 
     // Accumulate the entire program stack into the IVC
     // TODO(https://github.com/AztecProtocol/barretenberg/issues/1116): remove manual setting of is_kernel once databus
diff --git a/barretenberg/cpp/src/barretenberg/eccvm/eccvm_prover.cpp b/barretenberg/cpp/src/barretenberg/eccvm/eccvm_prover.cpp
index 99f1350f9209..d95a2f01ad76 100644
--- a/barretenberg/cpp/src/barretenberg/eccvm/eccvm_prover.cpp
+++ b/barretenberg/cpp/src/barretenberg/eccvm/eccvm_prover.cpp
@@ -104,8 +104,7 @@ void ECCVMProver::execute_relation_check_rounds()
         gate_challenges[idx] = transcript->template get_challenge<FF>("Sumcheck:gate_challenge_" + std::to_string(idx));
     }
 
-    auto commitment_key = std::make_shared<CommitmentKey>(Flavor::BATCHED_RELATION_PARTIAL_LENGTH);
-    zk_sumcheck_data = ZKSumcheckData<Flavor>(key->log_circuit_size, transcript, commitment_key);
+    zk_sumcheck_data = ZKSumcheckData<Flavor>(key->log_circuit_size, transcript, key->commitment_key);
 
     sumcheck_output = sumcheck.prove(key->polynomials, relation_parameters, alpha, gate_challenges, zk_sumcheck_data);
 }
diff --git a/barretenberg/cpp/src/barretenberg/goblin/goblin.hpp b/barretenberg/cpp/src/barretenberg/goblin/goblin.hpp
index a8580ae94a70..fae8b19ec451 100644
--- a/barretenberg/cpp/src/barretenberg/goblin/goblin.hpp
+++ b/barretenberg/cpp/src/barretenberg/goblin/goblin.hpp
@@ -51,6 +51,7 @@ class GoblinProver {
      */
 
     std::shared_ptr<OpQueue> op_queue = std::make_shared<OpQueue>();
+    std::shared_ptr<CommitmentKey<curve::BN254>> commitment_key;
 
     MergeProof merge_proof;
     GoblinProof goblin_proof;
@@ -70,11 +71,12 @@ class GoblinProver {
     GoblinAccumulationOutput accumulator; // Used only for ACIR methods for now
 
   public:
-    GoblinProver()
+    GoblinProver(const std::shared_ptr<CommitmentKey<curve::BN254>>& bn254_commitment_key = nullptr)
     { // Mocks the interaction of a first circuit with the op queue due to the inability to currently handle zero
       // commitments (https://github.com/AztecProtocol/barretenberg/issues/871) which would otherwise appear in the
       // first round of the merge protocol. To be removed once the issue has been resolved.
-        GoblinMockCircuits::perform_op_queue_interactions_for_mock_first_circuit(op_queue);
+        commitment_key = bn254_commitment_key ? bn254_commitment_key : nullptr;
+        GoblinMockCircuits::perform_op_queue_interactions_for_mock_first_circuit(op_queue, commitment_key);
     }
     /**
      * @brief Construct a MegaHonk proof and a merge proof for the present circuit.
@@ -160,7 +162,7 @@ class GoblinProver {
             merge_proof_exists = true;
         }
 
-        MergeProver merge_prover{ circuit_builder.op_queue };
+        MergeProver merge_prover{ circuit_builder.op_queue, commitment_key };
         return merge_prover.construct_proof();
     };
 
@@ -209,7 +211,7 @@ class GoblinProver {
 
             auto translator_builder =
                 std::make_unique<TranslatorBuilder>(translation_batching_challenge_v, evaluation_challenge_x, op_queue);
-            translator_prover = std::make_unique<TranslatorProver>(*translator_builder, transcript);
+            translator_prover = std::make_unique<TranslatorProver>(*translator_builder, transcript, commitment_key);
         }
 
         {
diff --git a/barretenberg/cpp/src/barretenberg/goblin/mock_circuits.hpp b/barretenberg/cpp/src/barretenberg/goblin/mock_circuits.hpp
index 2ddcdfb20387..6cafcd7398f4 100644
--- a/barretenberg/cpp/src/barretenberg/goblin/mock_circuits.hpp
+++ b/barretenberg/cpp/src/barretenberg/goblin/mock_circuits.hpp
@@ -121,7 +121,8 @@ class GoblinMockCircuits {
      *
      * @param op_queue
      */
-    static void perform_op_queue_interactions_for_mock_first_circuit(std::shared_ptr<bb::ECCOpQueue>& op_queue)
+    static void perform_op_queue_interactions_for_mock_first_circuit(
+        std::shared_ptr<bb::ECCOpQueue>& op_queue, std::shared_ptr<CommitmentKey> commitment_key = nullptr)
     {
         PROFILE_THIS();
 
@@ -134,11 +135,12 @@ class GoblinMockCircuits {
 
         // Manually compute the op queue transcript commitments (which would normally be done by the merge prover)
         bb::srs::init_crs_factory("../srs_db/ignition");
-        auto commitment_key = CommitmentKey(op_queue->get_current_size());
+        auto bn254_commitment_key =
+            commitment_key ? commitment_key : std::make_shared<CommitmentKey>(op_queue->get_current_size());
         std::array<Point, Flavor::NUM_WIRES> op_queue_commitments;
         size_t idx = 0;
         for (auto& entry : op_queue->get_aggregate_transcript()) {
-            op_queue_commitments[idx++] = commitment_key.commit({ 0, entry });
+            op_queue_commitments[idx++] = commitment_key->commit({ 0, entry });
         }
         // Store the commitment data for use by the prover of the next circuit
         op_queue->set_commitment_data(op_queue_commitments);
diff --git a/barretenberg/cpp/src/barretenberg/plonk_honk_shared/execution_trace/mega_execution_trace.hpp b/barretenberg/cpp/src/barretenberg/plonk_honk_shared/execution_trace/mega_execution_trace.hpp
index a30a879142b8..26edf196c2d8 100644
--- a/barretenberg/cpp/src/barretenberg/plonk_honk_shared/execution_trace/mega_execution_trace.hpp
+++ b/barretenberg/cpp/src/barretenberg/plonk_honk_shared/execution_trace/mega_execution_trace.hpp
@@ -59,8 +59,15 @@ template <typename T> struct MegaTraceBlockData {
         };
     }
 
-    static uint32_t size() { return 0; }
-    static uint32_t dyadic_size() { return 0; }
+    size_t size() const
+        requires std::same_as<T, uint32_t>
+    {
+        size_t result{ 0 };
+        for (const auto& block_size : get()) {
+            result += block_size;
+        }
+        return static_cast<size_t>(result);
+    }
 
     bool operator==(const MegaTraceBlockData& other) const = default;
 };
@@ -72,6 +79,15 @@ struct TraceSettings {
     // The size of the overflow block. Specified separately because it is allowed to be determined at runtime in the
     // context of VK computation
     uint32_t overflow_capacity = 0;
+
+    size_t size() const { return structure->size() + static_cast<size_t>(overflow_capacity); }
+
+    size_t dyadic_size() const
+    {
+        const size_t total_size = size();
+        const size_t lower_dyadic = 1 << numeric::get_msb(total_size);
+        return total_size > lower_dyadic ? lower_dyadic << 1 : lower_dyadic;
+    }
 };
 
 class MegaTraceBlock : public ExecutionTraceBlock<fr, /*NUM_WIRES_ */ 4, /*NUM_SELECTORS_*/ 14> {
diff --git a/barretenberg/cpp/src/barretenberg/stdlib_circuit_builders/mega_flavor.hpp b/barretenberg/cpp/src/barretenberg/stdlib_circuit_builders/mega_flavor.hpp
index e87ebe9ea760..60165e1913e3 100644
--- a/barretenberg/cpp/src/barretenberg/stdlib_circuit_builders/mega_flavor.hpp
+++ b/barretenberg/cpp/src/barretenberg/stdlib_circuit_builders/mega_flavor.hpp
@@ -581,11 +581,13 @@ class MegaFlavor {
         VerificationKey(ProvingKey& proving_key)
         {
             set_metadata(proving_key);
-            if (proving_key.commitment_key == nullptr) {
-                proving_key.commitment_key = std::make_shared<CommitmentKey>(proving_key.circuit_size);
+            auto& ck = proving_key.commitment_key;
+            if (!ck || ck->srs->get_monomial_size() < proving_key.circuit_size) {
+                vinfo("commitment key being constructed in VK constructor");
+                ck = std::make_shared<CommitmentKey>(proving_key.circuit_size);
             }
             for (auto [polynomial, commitment] : zip_view(proving_key.polynomials.get_precomputed(), this->get_all())) {
-                commitment = proving_key.commitment_key->commit(polynomial);
+                commitment = ck->commit(polynomial);
             }
         }
 
diff --git a/barretenberg/cpp/src/barretenberg/sumcheck/sumcheck.hpp b/barretenberg/cpp/src/barretenberg/sumcheck/sumcheck.hpp
index 887730da4727..0a670c80e5c8 100644
--- a/barretenberg/cpp/src/barretenberg/sumcheck/sumcheck.hpp
+++ b/barretenberg/cpp/src/barretenberg/sumcheck/sumcheck.hpp
@@ -3,7 +3,7 @@
 #include "barretenberg/polynomials/polynomial_arithmetic.hpp"
 #include "barretenberg/sumcheck/sumcheck_output.hpp"
 #include "barretenberg/transcript/transcript.hpp"
-#include "barretenberg/ultra_honk/decider_proving_key.hpp"
+#include "barretenberg/ultra_honk/decider_proving_key.hpp" // WORKTODO: not needed?
 #include "sumcheck_round.hpp"
 
 namespace bb {
diff --git a/barretenberg/cpp/src/barretenberg/translator_vm/translator_prover.cpp b/barretenberg/cpp/src/barretenberg/translator_vm/translator_prover.cpp
index 0172648feeb4..a106f5716484 100644
--- a/barretenberg/cpp/src/barretenberg/translator_vm/translator_prover.cpp
+++ b/barretenberg/cpp/src/barretenberg/translator_vm/translator_prover.cpp
@@ -8,17 +8,18 @@
 
 namespace bb {
 
-TranslatorProver::TranslatorProver(CircuitBuilder& circuit_builder, const std::shared_ptr<Transcript>& transcript)
+TranslatorProver::TranslatorProver(CircuitBuilder& circuit_builder,
+                                   const std::shared_ptr<Transcript>& transcript,
+                                   std::shared_ptr<CommitmentKey> commitment_key)
     : dyadic_circuit_size(Flavor::compute_dyadic_circuit_size(circuit_builder))
     , mini_circuit_dyadic_size(Flavor::compute_mini_circuit_dyadic_size(circuit_builder))
     , transcript(transcript)
+    , key(std::make_shared<ProvingKey>(circuit_builder))
 {
     PROFILE_THIS();
 
-    // Compute total number of gates, dyadic circuit size, etc.
-    key = std::make_shared<ProvingKey>(circuit_builder);
+    key->commitment_key = commitment_key ? commitment_key : std::make_shared<CommitmentKey>(key->circuit_size);
     compute_witness(circuit_builder);
-    compute_commitment_key(key->circuit_size);
 }
 
 /**
@@ -159,9 +160,8 @@ void TranslatorProver::execute_relation_check_rounds()
         gate_challenges[idx] = transcript->template get_challenge<FF>("Sumcheck:gate_challenge_" + std::to_string(idx));
     }
 
-    // create masking polynomials for sumcheck round univariates and auxiliary data
-    auto commitment_key = std::make_shared<CommitmentKey>(Flavor::BATCHED_RELATION_PARTIAL_LENGTH);
-    zk_sumcheck_data = ZKSumcheckData<Flavor>(key->log_circuit_size, transcript, commitment_key);
+    // // create masking polynomials for sumcheck round univariates and auxiliary data
+    zk_sumcheck_data = ZKSumcheckData<Flavor>(key->log_circuit_size, transcript, key->commitment_key);
 
     sumcheck_output = sumcheck.prove(key->polynomials, relation_parameters, alpha, gate_challenges, zk_sumcheck_data);
 }
diff --git a/barretenberg/cpp/src/barretenberg/translator_vm/translator_prover.hpp b/barretenberg/cpp/src/barretenberg/translator_vm/translator_prover.hpp
index a8a19591ef80..989596fd02b7 100644
--- a/barretenberg/cpp/src/barretenberg/translator_vm/translator_prover.hpp
+++ b/barretenberg/cpp/src/barretenberg/translator_vm/translator_prover.hpp
@@ -28,7 +28,9 @@ class TranslatorProver {
     size_t dyadic_circuit_size = 0;      // final power-of-2 circuit size
     size_t mini_circuit_dyadic_size = 0; // The size of the small circuit that contains non-range constraint relations
 
-    explicit TranslatorProver(CircuitBuilder& circuit_builder, const std::shared_ptr<Transcript>& transcript);
+    explicit TranslatorProver(CircuitBuilder& circuit_builder,
+                              const std::shared_ptr<Transcript>& transcript,
+                              std::shared_ptr<CommitmentKey> commitment_key = nullptr);
 
     void compute_witness(CircuitBuilder& circuit_builder);
     void compute_commitment_key(size_t circuit_size);
diff --git a/barretenberg/cpp/src/barretenberg/ultra_honk/decider_prover.cpp b/barretenberg/cpp/src/barretenberg/ultra_honk/decider_prover.cpp
index bdee7b3d8cd4..467adebf3bb3 100644
--- a/barretenberg/cpp/src/barretenberg/ultra_honk/decider_prover.cpp
+++ b/barretenberg/cpp/src/barretenberg/ultra_honk/decider_prover.cpp
@@ -57,11 +57,11 @@ template <IsUltraFlavor Flavor> void DeciderProver_<Flavor>::execute_relation_ch
  */
 template <IsUltraFlavor Flavor> void DeciderProver_<Flavor>::execute_pcs_rounds()
 {
-    if (proving_key->proving_key.commitment_key == nullptr) {
+    if (!proving_key->proving_key.commitment_key) {
+        vinfo("Constructor vk in decider PCS rounds function");
         proving_key->proving_key.commitment_key =
             std::make_shared<CommitmentKey>(proving_key->proving_key.circuit_size);
     }
-    vinfo("made commitment key");
     using OpeningClaim = ProverOpeningClaim<Curve>;
 
     OpeningClaim prover_opening_claim;
diff --git a/barretenberg/cpp/src/barretenberg/ultra_honk/decider_proving_key.hpp b/barretenberg/cpp/src/barretenberg/ultra_honk/decider_proving_key.hpp
index 400ce2c6b7db..23d001b36e56 100644
--- a/barretenberg/cpp/src/barretenberg/ultra_honk/decider_proving_key.hpp
+++ b/barretenberg/cpp/src/barretenberg/ultra_honk/decider_proving_key.hpp
@@ -44,12 +44,12 @@ template <IsHonkFlavor Flavor> class DeciderProvingKey_ {
     std::vector<FF> gate_challenges;
     // The target sum, which is typically nonzero for a ProtogalaxyProver's accmumulator
     FF target_sum;
-
     size_t final_active_wire_idx{ 0 }; // idx of last non-trivial wire value in the trace
+    size_t dyadic_circuit_size{ 0 };   // final power-of-2 circuit size
 
     DeciderProvingKey_(Circuit& circuit,
                        TraceSettings trace_settings = {},
-                       std::shared_ptr<typename Flavor::CommitmentKey> commitment_key = nullptr)
+                       std::shared_ptr<CommitmentKey> commitment_key = nullptr)
         : is_structured(trace_settings.structure.has_value())
     {
         PROFILE_THIS_NAME("DeciderProvingKey(Circuit&)");
@@ -79,6 +79,7 @@ template <IsHonkFlavor Flavor> class DeciderProvingKey_ {
 
         // Complete the public inputs execution trace block from circuit.public_inputs
         Trace::populate_public_inputs_block(circuit);
+        vinfo("populated public inputs block");
         circuit.blocks.compute_offsets(is_structured);
 
         // Find index of last non-trivial wire value in the trace
@@ -101,9 +102,11 @@ template <IsHonkFlavor Flavor> class DeciderProvingKey_ {
             proving_key = ProvingKey(dyadic_circuit_size, circuit.public_inputs.size(), commitment_key);
             // If not using structured trace OR if using structured trace but overflow has occurred (overflow block in
             // use), allocate full size polys
+            vinfo("allocated polynomials object in proving key");
             if ((IsMegaFlavor<Flavor> && !is_structured) || (is_structured && circuit.blocks.has_overflow)) {
                 // Allocate full size polynomials
                 proving_key.polynomials = typename Flavor::ProverPolynomials(dyadic_circuit_size);
+                vinfo("allocated polynomials object in proving key");
             } else { // Allocate only a correct amount of memory for each polynomial
                 // Allocate the wires and selectors polynomials
                 {
@@ -328,7 +331,6 @@ template <IsHonkFlavor Flavor> class DeciderProvingKey_ {
   private:
     static constexpr size_t num_zero_rows = Flavor::has_zero_row ? 1 : 0;
     static constexpr size_t NUM_WIRES = Circuit::NUM_WIRES;
-    size_t dyadic_circuit_size = 0; // final power-of-2 circuit size
 
     size_t compute_dyadic_size(Circuit&);
 
diff --git a/barretenberg/cpp/src/barretenberg/ultra_honk/merge_prover.cpp b/barretenberg/cpp/src/barretenberg/ultra_honk/merge_prover.cpp
index d4bb3526c870..00d3757db444 100644
--- a/barretenberg/cpp/src/barretenberg/ultra_honk/merge_prover.cpp
+++ b/barretenberg/cpp/src/barretenberg/ultra_honk/merge_prover.cpp
@@ -10,13 +10,14 @@ namespace bb {
  *
  */
 template <class Flavor>
-MergeProver_<Flavor>::MergeProver_(const std::shared_ptr<ECCOpQueue>& op_queue)
+MergeProver_<Flavor>::MergeProver_(const std::shared_ptr<ECCOpQueue>& op_queue,
+                                   std::shared_ptr<CommitmentKey> commitment_key)
     : op_queue(op_queue)
 {
     // Update internal size data in the op queue that allows for extraction of e.g. previous aggregate transcript
     op_queue->set_size_data();
-    // Get the appropriate commitment based on the updated ultra ops size
-    pcs_commitment_key = std::make_shared<CommitmentKey>(op_queue->get_current_size());
+    pcs_commitment_key =
+        commitment_key ? commitment_key : std::make_shared<CommitmentKey>(op_queue->get_current_size());
 }
 
 /**
diff --git a/barretenberg/cpp/src/barretenberg/ultra_honk/merge_prover.hpp b/barretenberg/cpp/src/barretenberg/ultra_honk/merge_prover.hpp
index 9499ed5fa01d..9a265698c096 100644
--- a/barretenberg/cpp/src/barretenberg/ultra_honk/merge_prover.hpp
+++ b/barretenberg/cpp/src/barretenberg/ultra_honk/merge_prover.hpp
@@ -27,7 +27,8 @@ template <typename Flavor> class MergeProver_ {
   public:
     std::shared_ptr<Transcript> transcript;
 
-    explicit MergeProver_(const std::shared_ptr<ECCOpQueue>&);
+    explicit MergeProver_(const std::shared_ptr<ECCOpQueue>& op_queue,
+                          std::shared_ptr<CommitmentKey> commitment_key = nullptr);
 
     BB_PROFILE HonkProof construct_proof();
 
diff --git a/barretenberg/cpp/src/barretenberg/ultra_honk/oink_prover.cpp b/barretenberg/cpp/src/barretenberg/ultra_honk/oink_prover.cpp
index cbea1470ab5e..aaf00b6284a2 100644
--- a/barretenberg/cpp/src/barretenberg/ultra_honk/oink_prover.cpp
+++ b/barretenberg/cpp/src/barretenberg/ultra_honk/oink_prover.cpp
@@ -58,8 +58,10 @@ template <IsUltraFlavor Flavor> void OinkProver<Flavor>::prove()
     // Generate relation separators alphas for sumcheck/combiner computation
     proving_key->alphas = generate_alphas_round();
 
+#ifndef __wasm__
     // Free the commitment key
     proving_key->proving_key.commitment_key = nullptr;
+#endif
 }
 
 /**