diff --git a/libraries/chain/block_state.cpp b/libraries/chain/block_state.cpp
index 8630a4bcca..b750e68292 100644
--- a/libraries/chain/block_state.cpp
+++ b/libraries/chain/block_state.cpp
@@ -21,20 +21,20 @@ block_state::block_state(const block_header_state& bhs, deque<transaction_metada
    block->transactions = std::move(trx_receipts);
 }
 
-// Used for transition from dbpos to instant-finality
+// Used for transition from dpos to instant-finality
 block_state::block_state(const block_state_legacy& bsp) {
    block_header_state::id = bsp.id();
    header = bsp.header;
    activated_protocol_features = bsp.activated_protocol_features;
    std::optional<block_header_extension> ext = bsp.block->extract_header_extension(instant_finality_extension::extension_id());
-   assert(ext); // required by current transistion mechanism
+   assert(ext); // required by current transition mechanism
    const auto& if_extension = std::get<instant_finality_extension>(*ext);
-   assert(if_extension.new_finalizer_policy); // required by current transistion mechanism
+   assert(if_extension.new_finalizer_policy); // required by current transition mechanism
    active_finalizer_policy = std::make_shared<finalizer_policy>(*if_extension.new_finalizer_policy);
    active_proposer_policy = std::make_shared<proposer_policy>();
    active_proposer_policy->active_time = bsp.timestamp();
    active_proposer_policy->proposer_schedule = bsp.active_schedule;
-   header_exts = bsp.header_exts; // not needed, but copy over just in case
+   header_exts = bsp.header_exts;
    block = bsp.block;
    validated = bsp.is_valid();
    pub_keys_recovered = bsp._pub_keys_recovered;
diff --git a/libraries/chain/controller.cpp b/libraries/chain/controller.cpp
index 90459ac4ab..10d987d5ce 100644
--- a/libraries/chain/controller.cpp
+++ b/libraries/chain/controller.cpp
@@ -178,7 +178,7 @@ struct block_data_t {
    block_timestamp_type head_block_time() const { return std::visit([](const auto& bd) { return bd.head->timestamp(); }, v); }
    account_name         head_block_producer() const { return std::visit([](const auto& bd) { return bd.head->producer(); }, v); }
 
-   void transistion_fork_db_to_if(const auto& vbsp) {
+   void transition_fork_db_to_if(const auto& vbsp) {
       std::visit([](auto& bd) { bd.fork_db.close(); }, v);
       auto bsp = std::make_shared<block_state>(*std::get<block_state_legacy_ptr>(vbsp));
       v.emplace<block_data_new_t>(std::visit([](const auto& bd) { return bd.fork_db.get_data_dir(); }, v));
@@ -2720,7 +2720,7 @@ struct controller_impl {
             log_irreversible();
          }
 
-         // TODO: temp transistion to instant-finality, happens immediately after block with new_finalizer_policy
+         // TODO: temp transition to instant-finality, happens immediately after block with new_finalizer_policy
          auto transition = [&](auto& fork_db, auto& head) -> bool {
             const auto& bsp = std::get<std::decay_t<decltype(head)>>(cb.bsp);
             std::optional<block_header_extension> ext = bsp->block->extract_header_extension(instant_finality_extension::extension_id());
@@ -2737,7 +2737,7 @@ struct controller_impl {
             return false;
          };
          if (block_data.apply_dpos<bool>(transition)) {
-            block_data.transistion_fork_db_to_if(cb.bsp);
+            block_data.transition_fork_db_to_if(cb.bsp);
          }
 
       } catch (...) {