diff --git a/eras/allegra/impl/CHANGELOG.md b/eras/allegra/impl/CHANGELOG.md
index 1e67767648d..b826ef13e20 100644
--- a/eras/allegra/impl/CHANGELOG.md
+++ b/eras/allegra/impl/CHANGELOG.md
@@ -3,6 +3,7 @@
 ## 1.4.1.0
 
 * Add a `ToJSON` instance for `ValidityInterval`
+* Add `metadataAllegraTxAuxDataL`
 
 ## 1.4.0.0
 
diff --git a/eras/allegra/impl/cardano-ledger-allegra.cabal b/eras/allegra/impl/cardano-ledger-allegra.cabal
index 3c3704ed2b3..18b92c226c1 100644
--- a/eras/allegra/impl/cardano-ledger-allegra.cabal
+++ b/eras/allegra/impl/cardano-ledger-allegra.cabal
@@ -67,7 +67,7 @@ library
         bytestring,
         cardano-crypto-class,
         cardano-ledger-binary ^>=1.3,
-        cardano-ledger-core ^>=1.11,
+        cardano-ledger-core ^>=1.12,
         cardano-ledger-shelley ^>=1.10,
         cardano-strict-containers,
         cardano-slotting,
diff --git a/eras/allegra/impl/src/Cardano/Ledger/Allegra/TxAuxData.hs b/eras/allegra/impl/src/Cardano/Ledger/Allegra/TxAuxData.hs
index b73a916bd1d..1163f0d284b 100644
--- a/eras/allegra/impl/src/Cardano/Ledger/Allegra/TxAuxData.hs
+++ b/eras/allegra/impl/src/Cardano/Ledger/Allegra/TxAuxData.hs
@@ -19,6 +19,7 @@
 module Cardano.Ledger.Allegra.TxAuxData (
   AllegraTxAuxData (AllegraTxAuxData),
   AllegraTxAuxDataRaw,
+  metadataAllegraTxAuxDataL,
 
   -- * Deprecations
   AuxiliaryData,
@@ -51,6 +52,7 @@ import Cardano.Ledger.MemoBytes (
   Memoized (RawType),
   getMemoRawType,
   getMemoSafeHash,
+  lensMemoRawType,
   mkMemoized,
  )
 import Cardano.Ledger.SafeHash (HashAnnotated, SafeToHash, hashAnnotated)
@@ -71,6 +73,7 @@ import Data.Sequence.Strict (StrictSeq)
 import qualified Data.Sequence.Strict as StrictSeq
 import Data.Word (Word64)
 import GHC.Generics (Generic)
+import Lens.Micro (Lens')
 import NoThunks.Class (NoThunks)
 
 -- =======================================
@@ -90,12 +93,20 @@ data AllegraTxAuxDataRaw era = AllegraTxAuxDataRaw
 instance Crypto c => EraTxAuxData (AllegraEra c) where
   type TxAuxData (AllegraEra c) = AllegraTxAuxData (AllegraEra c)
 
+  mkBasicTxAuxData = AllegraTxAuxData mempty mempty
+
+  metadataTxAuxDataL = metadataAllegraTxAuxDataL
+
   upgradeTxAuxData (ShelleyTxAuxData md) = AllegraTxAuxData md mempty
 
   validateTxAuxData _ (AllegraTxAuxData md as) = as `deepseq` all validMetadatum md
 
   hashTxAuxData aux = AuxiliaryDataHash (hashAnnotated aux)
 
+metadataAllegraTxAuxDataL :: Era era => Lens' (AllegraTxAuxData era) (Map Word64 Metadatum)
+metadataAllegraTxAuxDataL =
+  lensMemoRawType atadrMetadata $ \txAuxDataRaw md -> txAuxDataRaw {atadrMetadata = md}
+
 deriving instance HashAlgorithm (HASH (EraCrypto era)) => Show (AllegraTxAuxDataRaw era)
 
 deriving instance Era era => NoThunks (AllegraTxAuxDataRaw era)
diff --git a/eras/alonzo/impl/CHANGELOG.md b/eras/alonzo/impl/CHANGELOG.md
index 17b8e52cf32..c821741bdb3 100644
--- a/eras/alonzo/impl/CHANGELOG.md
+++ b/eras/alonzo/impl/CHANGELOG.md
@@ -5,6 +5,7 @@
 * Change the type of the balance field in `InsufficientCollateral` to `DeltaCoin`
 * Add `ToJSON` instances for `FailureDescription` and `TagMismatchDescription`
 * Undeprecate `redeemerPointer`.
+* Add `metadataAlonzoTxAuxDataL`.
 
 ## 1.7.0.0
 
diff --git a/eras/alonzo/impl/cardano-ledger-alonzo.cabal b/eras/alonzo/impl/cardano-ledger-alonzo.cabal
index a3ad743209b..28194383bf0 100644
--- a/eras/alonzo/impl/cardano-ledger-alonzo.cabal
+++ b/eras/alonzo/impl/cardano-ledger-alonzo.cabal
@@ -79,7 +79,7 @@ library
         cardano-ledger-allegra ^>=1.4,
         cardano-crypto-class,
         cardano-ledger-binary ^>=1.3,
-        cardano-ledger-core ^>=1.11,
+        cardano-ledger-core ^>=1.12,
         cardano-ledger-mary ^>=1.5,
         cardano-ledger-shelley ^>=1.10,
         cardano-slotting,
diff --git a/eras/alonzo/impl/src/Cardano/Ledger/Alonzo/TxAuxData.hs b/eras/alonzo/impl/src/Cardano/Ledger/Alonzo/TxAuxData.hs
index 28097ab391a..e31bce394d8 100644
--- a/eras/alonzo/impl/src/Cardano/Ledger/Alonzo/TxAuxData.hs
+++ b/eras/alonzo/impl/src/Cardano/Ledger/Alonzo/TxAuxData.hs
@@ -37,6 +37,7 @@ module Cardano.Ledger.Alonzo.TxAuxData (
   validateAlonzoTxAuxData,
   getAlonzoTxAuxDataScripts,
   translateAlonzoTxAuxData,
+  metadataAlonzoTxAuxDataL,
 
   -- * Deprecated
   AuxiliaryData,
@@ -77,6 +78,7 @@ import Cardano.Ledger.MemoBytes (
   Memoized (RawType),
   getMemoRawType,
   getMemoSafeHash,
+  lensMemoRawType,
   mkMemoized,
  )
 import Cardano.Ledger.Plutus.Language (Language (..), PlutusBinary (..), guardPlutus)
@@ -93,6 +95,7 @@ import qualified Data.Sequence.Strict as StrictSeq
 import Data.Word (Word64)
 import GHC.Generics (Generic)
 import GHC.Stack
+import Lens.Micro (Lens')
 import NoThunks.Class (InspectHeapNamed (..), NoThunks)
 
 -- =============================================================================
@@ -254,6 +257,10 @@ type AuxiliaryData era = AlonzoTxAuxData era
 instance Crypto c => EraTxAuxData (AlonzoEra c) where
   type TxAuxData (AlonzoEra c) = AlonzoTxAuxData (AlonzoEra c)
 
+  mkBasicTxAuxData = AlonzoTxAuxData mempty mempty mempty
+
+  metadataTxAuxDataL = metadataAlonzoTxAuxDataL
+
   upgradeTxAuxData (AllegraTxAuxData md scripts) =
     mkMemoized $
       AlonzoTxAuxDataRaw
@@ -266,6 +273,10 @@ instance Crypto c => EraTxAuxData (AlonzoEra c) where
 
   validateTxAuxData = validateAlonzoTxAuxData
 
+metadataAlonzoTxAuxDataL :: Era era => Lens' (AlonzoTxAuxData era) (Map Word64 Metadatum)
+metadataAlonzoTxAuxDataL =
+  lensMemoRawType atadrMetadata $ \txAuxDataRaw md -> txAuxDataRaw {atadrMetadata = md}
+
 hashAlonzoTxAuxData ::
   (HashAlgorithm (HASH c), HashAnnotated x EraIndependentTxAuxData c) =>
   x ->
diff --git a/eras/alonzo/test-suite/cardano-ledger-alonzo-test.cabal b/eras/alonzo/test-suite/cardano-ledger-alonzo-test.cabal
index 95b08250a8e..e3786b95992 100644
--- a/eras/alonzo/test-suite/cardano-ledger-alonzo-test.cabal
+++ b/eras/alonzo/test-suite/cardano-ledger-alonzo-test.cabal
@@ -46,7 +46,7 @@ library
         bytestring,
         cardano-ledger-alonzo:{cardano-ledger-alonzo, testlib} >=1.7,
         cardano-ledger-binary:{cardano-ledger-binary, testlib} >=1.0,
-        cardano-ledger-core:{cardano-ledger-core, testlib} >=1.11 && <1.12,
+        cardano-ledger-core:{cardano-ledger-core, testlib} >=1.11 && <1.13,
         cardano-ledger-allegra >=1.2,
         cardano-ledger-shelley:{cardano-ledger-shelley, testlib} >=1.6 && <1.11,
         cardano-ledger-shelley-test >=1.2,
diff --git a/eras/babbage/impl/cardano-ledger-babbage.cabal b/eras/babbage/impl/cardano-ledger-babbage.cabal
index 97638302296..d3faea9a8e5 100644
--- a/eras/babbage/impl/cardano-ledger-babbage.cabal
+++ b/eras/babbage/impl/cardano-ledger-babbage.cabal
@@ -75,7 +75,7 @@ library
         cardano-ledger-allegra ^>=1.4,
         cardano-ledger-alonzo ^>=1.8,
         cardano-ledger-binary ^>=1.3,
-        cardano-ledger-core ^>=1.11,
+        cardano-ledger-core ^>=1.12,
         cardano-ledger-mary ^>=1.5,
         cardano-ledger-shelley ^>=1.10,
         cardano-strict-containers,
diff --git a/eras/babbage/impl/src/Cardano/Ledger/Babbage/TxAuxData.hs b/eras/babbage/impl/src/Cardano/Ledger/Babbage/TxAuxData.hs
index e4d184b39e2..7eb00438a05 100644
--- a/eras/babbage/impl/src/Cardano/Ledger/Babbage/TxAuxData.hs
+++ b/eras/babbage/impl/src/Cardano/Ledger/Babbage/TxAuxData.hs
@@ -4,8 +4,9 @@
 module Cardano.Ledger.Babbage.TxAuxData () where
 
 import Cardano.Ledger.Alonzo.TxAuxData (
-  AlonzoTxAuxData,
+  AlonzoTxAuxData (..),
   hashAlonzoTxAuxData,
+  metadataAlonzoTxAuxDataL,
   translateAlonzoTxAuxData,
   validateAlonzoTxAuxData,
  )
@@ -17,6 +18,10 @@ import Cardano.Ledger.Crypto
 instance Crypto c => EraTxAuxData (BabbageEra c) where
   type TxAuxData (BabbageEra c) = AlonzoTxAuxData (BabbageEra c)
 
+  mkBasicTxAuxData = AlonzoTxAuxData mempty mempty mempty
+
+  metadataTxAuxDataL = metadataAlonzoTxAuxDataL
+
   upgradeTxAuxData = translateAlonzoTxAuxData
 
   hashTxAuxData = hashAlonzoTxAuxData
diff --git a/eras/conway/impl/cardano-ledger-conway.cabal b/eras/conway/impl/cardano-ledger-conway.cabal
index eb23806cd56..57884d3d265 100644
--- a/eras/conway/impl/cardano-ledger-conway.cabal
+++ b/eras/conway/impl/cardano-ledger-conway.cabal
@@ -90,7 +90,7 @@ library
         cardano-ledger-allegra ^>=1.4,
         cardano-ledger-alonzo ^>=1.8,
         cardano-ledger-babbage ^>=1.8,
-        cardano-ledger-core ^>=1.11,
+        cardano-ledger-core ^>=1.12,
         cardano-ledger-mary ^>=1.5,
         cardano-ledger-shelley ^>=1.10,
         cardano-slotting,
diff --git a/eras/conway/impl/src/Cardano/Ledger/Conway/TxAuxData.hs b/eras/conway/impl/src/Cardano/Ledger/Conway/TxAuxData.hs
index 4b8be90c636..4f7355bfc66 100644
--- a/eras/conway/impl/src/Cardano/Ledger/Conway/TxAuxData.hs
+++ b/eras/conway/impl/src/Cardano/Ledger/Conway/TxAuxData.hs
@@ -4,8 +4,9 @@
 module Cardano.Ledger.Conway.TxAuxData () where
 
 import Cardano.Ledger.Alonzo.TxAuxData (
-  AlonzoTxAuxData,
+  AlonzoTxAuxData (..),
   hashAlonzoTxAuxData,
+  metadataAlonzoTxAuxDataL,
   translateAlonzoTxAuxData,
   validateAlonzoTxAuxData,
  )
@@ -17,6 +18,10 @@ import Cardano.Ledger.Crypto
 instance Crypto c => EraTxAuxData (ConwayEra c) where
   type TxAuxData (ConwayEra c) = AlonzoTxAuxData (ConwayEra c)
 
+  mkBasicTxAuxData = AlonzoTxAuxData mempty mempty mempty
+
+  metadataTxAuxDataL = metadataAlonzoTxAuxDataL
+
   upgradeTxAuxData = translateAlonzoTxAuxData
 
   hashTxAuxData = hashAlonzoTxAuxData
diff --git a/eras/mary/impl/cardano-ledger-mary.cabal b/eras/mary/impl/cardano-ledger-mary.cabal
index d850f9464c8..fc1d202c782 100644
--- a/eras/mary/impl/cardano-ledger-mary.cabal
+++ b/eras/mary/impl/cardano-ledger-mary.cabal
@@ -1,6 +1,6 @@
 cabal-version:      3.0
 name:               cardano-ledger-mary
-version:            1.5.1.0
+version:            1.5.1.1
 license:            Apache-2.0
 maintainer:         operations@iohk.io
 author:             IOHK
@@ -74,9 +74,9 @@ library
         aeson >=2.2,
         cardano-crypto-class,
         cardano-data ^>=1.2,
-        cardano-ledger-allegra ^>=1.4,
+        cardano-ledger-allegra ^>=1.4.1,
         cardano-ledger-binary ^>=1.3,
-        cardano-ledger-core ^>=1.11,
+        cardano-ledger-core ^>=1.12,
         cardano-ledger-shelley ^>=1.10,
         containers,
         deepseq,
diff --git a/eras/mary/impl/src/Cardano/Ledger/Mary/TxAuxData.hs b/eras/mary/impl/src/Cardano/Ledger/Mary/TxAuxData.hs
index 1f72f72ffaf..dc09d437869 100644
--- a/eras/mary/impl/src/Cardano/Ledger/Mary/TxAuxData.hs
+++ b/eras/mary/impl/src/Cardano/Ledger/Mary/TxAuxData.hs
@@ -12,7 +12,7 @@ module Cardano.Ledger.Mary.TxAuxData (
 )
 where
 
-import Cardano.Ledger.Allegra.TxAuxData
+import Cardano.Ledger.Allegra.TxAuxData (AllegraTxAuxData (..), metadataAllegraTxAuxDataL)
 import Cardano.Ledger.AuxiliaryData (AuxiliaryDataHash (..))
 import Cardano.Ledger.Core (EraTxAuxData (..), upgradeScript)
 import Cardano.Ledger.Crypto (Crypto)
@@ -27,6 +27,10 @@ import Control.DeepSeq (deepseq)
 instance Crypto c => EraTxAuxData (MaryEra c) where
   type TxAuxData (MaryEra c) = AllegraTxAuxData (MaryEra c)
 
+  mkBasicTxAuxData = AllegraTxAuxData mempty mempty
+
+  metadataTxAuxDataL = metadataAllegraTxAuxDataL
+
   upgradeTxAuxData (AllegraTxAuxData md scripts) = AllegraTxAuxData md $ upgradeScript <$> scripts
 
   validateTxAuxData _ (AllegraTxAuxData md as) = as `deepseq` all validMetadatum md
diff --git a/eras/shelley/impl/cardano-ledger-shelley.cabal b/eras/shelley/impl/cardano-ledger-shelley.cabal
index a2ffe66f473..d2a91fa939e 100644
--- a/eras/shelley/impl/cardano-ledger-shelley.cabal
+++ b/eras/shelley/impl/cardano-ledger-shelley.cabal
@@ -108,7 +108,7 @@ library
         cardano-data ^>=1.2.2,
         cardano-ledger-binary ^>=1.3,
         cardano-ledger-byron,
-        cardano-ledger-core ^>=1.11.1,
+        cardano-ledger-core ^>=1.12,
         cardano-slotting,
         vector-map ^>=1.1,
         containers,
diff --git a/eras/shelley/impl/src/Cardano/Ledger/Shelley/TxAuxData.hs b/eras/shelley/impl/src/Cardano/Ledger/Shelley/TxAuxData.hs
index 7132087ca9b..666b6ede263 100644
--- a/eras/shelley/impl/src/Cardano/Ledger/Shelley/TxAuxData.hs
+++ b/eras/shelley/impl/src/Cardano/Ledger/Shelley/TxAuxData.hs
@@ -47,6 +47,7 @@ import Cardano.Ledger.MemoBytes (
   Memoized (RawType),
   getMemoRawType,
   getMemoSafeHash,
+  lensMemoRawType,
   mkMemoized,
  )
 import Cardano.Ledger.Metadata (Metadatum (..), validMetadatum)
@@ -107,6 +108,11 @@ type Metadata era = ShelleyTxAuxData era
 instance Crypto c => EraTxAuxData (ShelleyEra c) where
   type TxAuxData (ShelleyEra c) = ShelleyTxAuxData (ShelleyEra c)
 
+  mkBasicTxAuxData = ShelleyTxAuxData mempty
+
+  metadataTxAuxDataL =
+    lensMemoRawType stadrMetadata $ \txAuxDataRaw md -> txAuxDataRaw {stadrMetadata = md}
+
   -- Calling this partial function will result in compilation error, since ByronEra has
   -- no instance for EraTxOut type class.
   upgradeTxAuxData = error "It is not possible to translate Byron TxOut with 'upgradeTxOut'"
diff --git a/eras/shelley/test-suite/cardano-ledger-shelley-test.cabal b/eras/shelley/test-suite/cardano-ledger-shelley-test.cabal
index 8d40b694f64..95858e97ee6 100644
--- a/eras/shelley/test-suite/cardano-ledger-shelley-test.cabal
+++ b/eras/shelley/test-suite/cardano-ledger-shelley-test.cabal
@@ -1,6 +1,6 @@
 cabal-version:      3.0
 name:               cardano-ledger-shelley-test
-version:            1.4.0.0
+version:            1.4.0.1
 license:            Apache-2.0
 maintainer:         operations@iohk.io
 author:             IOHK
@@ -78,7 +78,7 @@ library
         cardano-data >=1.2,
         cardano-ledger-binary:{cardano-ledger-binary, testlib} >=1.3,
         cardano-ledger-byron,
-        cardano-ledger-core:{cardano-ledger-core, testlib} ^>=1.11,
+        cardano-ledger-core:{cardano-ledger-core, testlib} >=1.11 && <1.13,
         cardano-ledger-shelley:{cardano-ledger-shelley, testlib} ^>=1.10,
         cardano-protocol-tpraos:{cardano-protocol-tpraos, testlib} >=1.0.1,
         cardano-slotting:{cardano-slotting, testlib},
diff --git a/libs/cardano-ledger-api/CHANGELOG.md b/libs/cardano-ledger-api/CHANGELOG.md
index 106dd3f9d93..ed75a92e9df 100644
--- a/libs/cardano-ledger-api/CHANGELOG.md
+++ b/libs/cardano-ledger-api/CHANGELOG.md
@@ -3,6 +3,7 @@
 ## 1.9.1.0
 
 * Add `redeemerPointer` and `redeemerPointerInverse`.
+* Export `mkBasicTxAuxData` and `metadataTxAuxDataL`.
 
 ## 1.9.0.0
 
diff --git a/libs/cardano-ledger-api/cardano-ledger-api.cabal b/libs/cardano-ledger-api/cardano-ledger-api.cabal
index 7891b2b38f8..6599a70e03a 100644
--- a/libs/cardano-ledger-api/cardano-ledger-api.cabal
+++ b/libs/cardano-ledger-api/cardano-ledger-api.cabal
@@ -59,7 +59,7 @@ library
         cardano-ledger-babbage ^>=1.8,
         cardano-ledger-binary ^>=1.3,
         cardano-ledger-conway ^>=1.13,
-        cardano-ledger-core ^>=1.11,
+        cardano-ledger-core ^>=1.12,
         cardano-ledger-mary ^>=1.5,
         cardano-ledger-shelley ^>=1.10,
         cardano-slotting,
diff --git a/libs/cardano-ledger-api/src/Cardano/Ledger/Api/Tx/AuxData.hs b/libs/cardano-ledger-api/src/Cardano/Ledger/Api/Tx/AuxData.hs
index 531c6352399..6b2d9624429 100644
--- a/libs/cardano-ledger-api/src/Cardano/Ledger/Api/Tx/AuxData.hs
+++ b/libs/cardano-ledger-api/src/Cardano/Ledger/Api/Tx/AuxData.hs
@@ -1,5 +1,7 @@
 module Cardano.Ledger.Api.Tx.AuxData (
   EraTxAuxData (TxAuxData),
+  mkBasicTxAuxData,
+  metadataTxAuxDataL,
   upgradeTxAuxData,
   hashTxAuxData,
   validateTxAuxData,
diff --git a/libs/cardano-ledger-core/CHANGELOG.md b/libs/cardano-ledger-core/CHANGELOG.md
index 1a2479d24ca..c109cef9fa6 100644
--- a/libs/cardano-ledger-core/CHANGELOG.md
+++ b/libs/cardano-ledger-core/CHANGELOG.md
@@ -8,6 +8,7 @@
 * Add functions `rdRewardCoin`, `rdDepositCoin` in UMap.hs
 * Add function `mkCoinTxOut` in Core.hs
 * Move `Metadatum` from `cardano-ledger-shelley` into a new module `Cardano.Ledger.Metadata`
+* Add `mkBasicTxAuxData` and `metadataTxAuxDataL` to `EraTxAuxData` type class.
 
 ### `testlib`
 
diff --git a/libs/cardano-ledger-core/cardano-ledger-core.cabal b/libs/cardano-ledger-core/cardano-ledger-core.cabal
index a65789a9129..2d377cee1da 100644
--- a/libs/cardano-ledger-core/cardano-ledger-core.cabal
+++ b/libs/cardano-ledger-core/cardano-ledger-core.cabal
@@ -1,6 +1,6 @@
 cabal-version:      3.0
 name:               cardano-ledger-core
-version:            1.11.1.0
+version:            1.12.0.0
 license:            Apache-2.0
 maintainer:         operations@iohk.io
 author:             IOHK
diff --git a/libs/cardano-ledger-core/src/Cardano/Ledger/Core.hs b/libs/cardano-ledger-core/src/Cardano/Ledger/Core.hs
index 08f773bebef..e2fe27b18a9 100644
--- a/libs/cardano-ledger-core/src/Cardano/Ledger/Core.hs
+++ b/libs/cardano-ledger-core/src/Cardano/Ledger/Core.hs
@@ -102,6 +102,7 @@ import Cardano.Ledger.Keys (KeyHash, KeyRole (..))
 import Cardano.Ledger.Keys.Bootstrap (BootstrapWitness)
 import Cardano.Ledger.Keys.WitVKey (WitVKey)
 import Cardano.Ledger.MemoBytes
+import Cardano.Ledger.Metadata
 import Cardano.Ledger.Rewards (Reward (..), RewardType (..))
 import Cardano.Ledger.SafeHash (HashAnnotated (..), SafeToHash (..))
 import Cardano.Ledger.TxIn (TxId (..), TxIn (..))
@@ -449,6 +450,10 @@ class
   where
   type TxAuxData era = (r :: Type) | r -> era
 
+  mkBasicTxAuxData :: TxAuxData era
+
+  metadataTxAuxDataL :: Lens' (TxAuxData era) (Map Word64 Metadatum)
+
   -- | Every era, except Shelley, must be able to upgrade a `TxAuxData` from a previous
   -- era.
   --