diff --git a/apis/beacon/blocks/attestations.yaml b/apis/beacon/blocks/attestations.yaml
index 2f6bf81e..77d39d09 100644
--- a/apis/beacon/blocks/attestations.yaml
+++ b/apis/beacon/blocks/attestations.yaml
@@ -7,6 +7,7 @@ get:
   parameters:
     - name: block_id
       in: path
+      required: true
       $ref: '../../../beacon-node-oapi.yaml#/components/parameters/BlockId'
   
   responses:
diff --git a/apis/beacon/blocks/blinded_blocks.yaml b/apis/beacon/blocks/blinded_blocks.yaml
new file mode 100644
index 00000000..dc99dfbc
--- /dev/null
+++ b/apis/beacon/blocks/blinded_blocks.yaml
@@ -0,0 +1,45 @@
+post:
+  tags:
+    - Beacon
+    - ValidatorRequiredApi
+  summary: "Publish a signed block."
+  operationId: "publishBlindedBlock"
+  description: |
+    Instructs the beacon node to use the components of the `SignedBlindedBeaconBlock` to construct and publish a 
+    `SignedBeaconBlock` by swapping out the `transactions_root` for the corresponding full list of `transactions`.
+    The beacon node should broadcast a newly constructed `SignedBeaconBlock` to the beacon network,
+    to be included in the beacon chain. The beacon node is not required to validate the signed
+    `BeaconBlock`, and a successful response (20X) only indicates that the broadcast has been
+    successful. The beacon node is expected to integrate the new block into its state, and
+    therefore validate the block internally, however blocks which fail the validation are still
+    broadcast but a different status code is returned (202). Pre-Bellatrix, this endpoint will accept 
+    a `SignedBeaconBlock`.
+  requestBody:
+    description: "The `SignedBlindedBeaconBlock` object composed of `BlindedBeaconBlock` object (produced by beacon node) and validator signature."
+    required: true
+    content:
+      application/json:
+        schema:
+          oneOf:
+            - $ref: '../../../beacon-node-oapi.yaml#/components/schemas/SignedBeaconBlock'
+            - $ref: "../../../beacon-node-oapi.yaml#/components/schemas/Altair.SignedBeaconBlock"
+            - $ref: "../../../beacon-node-oapi.yaml#/components/schemas/Bellatrix.SignedBlindedBeaconBlock"
+  responses:
+    "200":
+      description: "The block was validated successfully and has been broadcast. It has also been integrated into the beacon node's database."
+    "202":
+      description: "The block failed validation, but was successfully broadcast anyway. It was not integrated into the beacon node's database."
+    "400":
+      description: "The `SignedBlindedBeaconBlock` object is invalid"
+      content:
+        application/json:
+          schema:
+            allOf:
+              - $ref: "../../../beacon-node-oapi.yaml#/components/schemas/ErrorMessage"
+              - example:
+                  code: 400
+                  message: "Invalid block: missing signature"
+    "500":
+      $ref: '../../../beacon-node-oapi.yaml#/components/responses/InternalError'
+    "503":
+      $ref: '../../../beacon-node-oapi.yaml#/components/responses/CurrentlySyncing'
diff --git a/apis/beacon/blocks/block.v2.yaml b/apis/beacon/blocks/block.v2.yaml
index de8613b2..b574e7fb 100644
--- a/apis/beacon/blocks/block.v2.yaml
+++ b/apis/beacon/blocks/block.v2.yaml
@@ -9,6 +9,7 @@ get:
   parameters:
     - name: block_id
       in: path
+      required: true
       $ref: '../../../beacon-node-oapi.yaml#/components/parameters/BlockId'
   responses:
     "200":
@@ -24,7 +25,7 @@ get:
             properties:
               version:
                 type: string
-                enum: [phase0, altair]
+                enum: [phase0, altair, bellatrix]
                 example: "phase0"
               execution_optimistic:
                 $ref: "../../../beacon-node-oapi.yaml#/components/schemas/ExecutionOptimistic"
@@ -32,6 +33,7 @@ get:
                 oneOf:
                   - $ref: "../../../beacon-node-oapi.yaml#/components/schemas/SignedBeaconBlock"
                   - $ref: "../../../beacon-node-oapi.yaml#/components/schemas/Altair.SignedBeaconBlock"
+                  - $ref: "../../../beacon-node-oapi.yaml#/components/schemas/Bellatrix.SignedBeaconBlock"
         application/octet-stream:
           schema:
             
diff --git a/apis/beacon/blocks/block.yaml b/apis/beacon/blocks/block.yaml
index fb5700a2..5177eac4 100644
--- a/apis/beacon/blocks/block.yaml
+++ b/apis/beacon/blocks/block.yaml
@@ -10,7 +10,14 @@ get:
   parameters:
     - name: block_id
       in: path
-      $ref: '../../../beacon-node-oapi.yaml#/components/parameters/BlockId'
+      required: true
+      example: "head"
+      schema:
+        type: string
+      description: |
+        Block identifier.
+        Can be one of: "head" (canonical head in node's view), "genesis", "finalized", \<slot\>, \<hex encoded blockRoot with 0x prefix\>.
+
   responses:
     "200":
       description: Success
diff --git a/apis/beacon/blocks/blocks.yaml b/apis/beacon/blocks/blocks.yaml
index cd1ab12b..da485b0c 100644
--- a/apis/beacon/blocks/blocks.yaml
+++ b/apis/beacon/blocks/blocks.yaml
@@ -20,6 +20,7 @@ post:
           oneOf:
            - $ref: '../../../beacon-node-oapi.yaml#/components/schemas/SignedBeaconBlock'
            - $ref: "../../../beacon-node-oapi.yaml#/components/schemas/Altair.SignedBeaconBlock"
+           - $ref: "../../../beacon-node-oapi.yaml#/components/schemas/Bellatrix.SignedBeaconBlock"
   responses:
     "200":
       description: "The block was validated successfully and has been broadcast. It has also been integrated into the beacon node's database."
diff --git a/apis/beacon/blocks/header.yaml b/apis/beacon/blocks/header.yaml
index 69533b1f..62a37ab8 100644
--- a/apis/beacon/blocks/header.yaml
+++ b/apis/beacon/blocks/header.yaml
@@ -7,6 +7,7 @@ get:
   parameters:
     - name: block_id
       in: path
+      required: true
       $ref: '../../../beacon-node-oapi.yaml#/components/parameters/BlockId'
   responses:
     "200":
diff --git a/apis/beacon/blocks/root.yaml b/apis/beacon/blocks/root.yaml
index 3da53125..316e63b5 100644
--- a/apis/beacon/blocks/root.yaml
+++ b/apis/beacon/blocks/root.yaml
@@ -7,7 +7,14 @@ get:
   parameters:
     - name: block_id
       in: path
-      $ref: '../../../beacon-node-oapi.yaml#/components/parameters/BlockId'
+      required: true
+      example: "head"
+      schema:
+        type: string
+      description: |
+        Block identifier.
+        Can be one of: "head" (canonical head in node's view), "genesis", "finalized", \<slot\>, \<hex encoded blockRoot with 0x prefix\>.
+
   responses:
     "200":
       description: Success
diff --git a/apis/debug/state.v2.yaml b/apis/debug/state.v2.yaml
index f1c22e3d..97f39968 100644
--- a/apis/debug/state.v2.yaml
+++ b/apis/debug/state.v2.yaml
@@ -25,7 +25,7 @@ get:
             properties:
               version:
                 type: string
-                enum: [ phase0, altair ]
+                enum: [ phase0, altair, bellatrix ]
                 example: "phase0"
               execution_optimistic:
                 $ref: "../../beacon-node-oapi.yaml#/components/schemas/ExecutionOptimistic"
@@ -33,6 +33,7 @@ get:
                 oneOf:
                  - $ref: '../../beacon-node-oapi.yaml#/components/schemas/BeaconState'
                  - $ref: "../../beacon-node-oapi.yaml#/components/schemas/Altair.BeaconState"
+                 - $ref: "../../beacon-node-oapi.yaml#/components/schemas/Bellatrix.BeaconState"
         application/octet-stream:
           schema:
             description: "SSZ serialized state bytes. Use Accept header to choose this response type"
diff --git a/apis/validator/blinded_block.yaml b/apis/validator/blinded_block.yaml
new file mode 100644
index 00000000..c3095322
--- /dev/null
+++ b/apis/validator/blinded_block.yaml
@@ -0,0 +1,66 @@
+get:
+  tags:
+    - ValidatorRequiredApi
+    - Validator
+  operationId: "produceBlindedBlock"
+  summary: "Produce a new blinded block, without signature."
+  description: |
+    Requests a beacon node to produce a valid blinded block, which can then be signed by a validator. 
+    A blinded block is a block with only a transactions root, rather than a full transactions list.
+
+    Metadata in the response indicates the type of block produced, and the supported types of block
+    will be added to as forks progress.
+    
+    Pre-Bellatrix, this endpoint will return a `BeaconBlock`.
+  parameters:
+    - name: slot
+      in: path
+      required: true
+      description: "The slot for which the block should be proposed."
+      schema:
+        $ref: "../../beacon-node-oapi.yaml#/components/schemas/Uint64"
+    - name: randao_reveal
+      in: query
+      required: true
+      description: "The validator's randao reveal value."
+      schema:
+        $ref: '../../beacon-node-oapi.yaml#/components/schemas/Signature'
+    - name: graffiti
+      in: query
+      required: false
+      description: "Arbitrary data validator wants to include in block."
+      schema:
+        $ref: '../../beacon-node-oapi.yaml#/components/schemas/Graffiti'
+  responses:
+    "200":
+      description: Success response
+      content:
+        application/json:
+          schema:
+            title: ProduceBlindedBlockResponse
+            type: object
+            properties:
+              version:
+                type: string
+                enum: [ phase0, altair, bellatrix ]
+                example: "bellatrix"
+              data:
+                oneOf:
+                  - $ref: '../../beacon-node-oapi.yaml#/components/schemas/BeaconBlock'
+                  - $ref: "../../beacon-node-oapi.yaml#/components/schemas/Altair.BeaconBlock"
+                  - $ref: "../../beacon-node-oapi.yaml#/components/schemas/Bellatrix.BlindedBeaconBlock"
+    "400":
+      description: "Invalid block production request"
+      content:
+        application/json:
+          schema:
+            $ref: "../../beacon-node-oapi.yaml#/components/schemas/ErrorMessage"
+          examples:
+            InvalidRequest:
+              value:
+                code: 400
+                message: "Invalid request to produce a block"
+    "500":
+      $ref: '../../beacon-node-oapi.yaml#/components/responses/InternalError'
+    "503":
+      $ref: '../../beacon-node-oapi.yaml#/components/responses/CurrentlySyncing'
diff --git a/apis/validator/block.v2.yaml b/apis/validator/block.v2.yaml
index 3dc78567..35d2c9a7 100644
--- a/apis/validator/block.v2.yaml
+++ b/apis/validator/block.v2.yaml
@@ -39,12 +39,13 @@ get:
             properties:
               version:
                 type: string
-                enum: [ phase0, altair ]
+                enum: [ phase0, altair, bellatrix ]
                 example: "phase0"
               data:
                 oneOf:
                  - $ref: '../../beacon-node-oapi.yaml#/components/schemas/BeaconBlock'
                  - $ref: "../../beacon-node-oapi.yaml#/components/schemas/Altair.BeaconBlock"
+                 - $ref: "../../beacon-node-oapi.yaml#/components/schemas/Bellatrix.BeaconBlock"
     "400":
       description: "Invalid block production request"
       content:
diff --git a/beacon-node-oapi.yaml b/beacon-node-oapi.yaml
index ccf27b3e..95aae8b3 100644
--- a/beacon-node-oapi.yaml
+++ b/beacon-node-oapi.yaml
@@ -69,6 +69,8 @@ paths:
     $ref: "./apis/beacon/blocks/header.yaml"
   /eth/v1/beacon/blocks:
     $ref: "./apis/beacon/blocks/blocks.yaml"
+  /eth/v1/beacon/blinded_blocks:
+    $ref: "./apis/beacon/blocks/blinded_blocks.yaml"
   /eth/v1/beacon/blocks/{block_id}:
     $ref: "./apis/beacon/blocks/block.yaml"
   /eth/v2/beacon/blocks/{block_id}:
@@ -129,7 +131,9 @@ paths:
   /eth/v1/validator/blocks/{slot}:
     $ref: "./apis/validator/block.yaml"
   /eth/v2/validator/blocks/{slot}:
-      $ref: "./apis/validator/block.v2.yaml"
+    $ref: "./apis/validator/block.v2.yaml"
+  /eth/v1/validator/blinded_blocks/{slot}:
+    $ref: "./apis/validator/blinded_block.yaml"
   /eth/v1/validator/attestation_data:
     $ref: "./apis/validator/attestation_data.yaml"
   /eth/v1/validator/aggregate_attestation:
@@ -245,6 +249,16 @@ components:
       $ref: './types/altair/sync_committee.yaml#/Altair/SyncCommitteeByValidatorIndices'
     ExecutionAddress:
       $ref: './types/primitive.yaml#/ExecutionAddress'
+    Bellatrix.BeaconState:
+      $ref: './types/bellatrix/state.yaml#/Bellatrix/BeaconState'
+    Bellatrix.BeaconBlock:
+      $ref: './types/bellatrix/block.yaml#/Bellatrix/BeaconBlock'
+    Bellatrix.SignedBeaconBlock:
+      $ref: './types/bellatrix/block.yaml#/Bellatrix/SignedBeaconBlock'
+    Bellatrix.BlindedBeaconBlock:
+      $ref: './types/bellatrix/block.yaml#/Bellatrix/BlindedBeaconBlock'
+    Bellatrix.SignedBlindedBeaconBlock:
+      $ref: './types/bellatrix/block.yaml#/Bellatrix/SignedBlindedBeaconBlock'
 
   parameters:
     StateId:
@@ -267,5 +281,5 @@ components:
       description: Required in response so client can deserialize returned json or ssz data more effectively.
       schema:
         type: string
-        enum: [phase0, altair]
+        enum: [phase0, altair, bellatrix]
         example: "phase0"
diff --git a/types/altair/state.yaml b/types/altair/state.yaml
index 83dd9a86..0386a4a5 100644
--- a/types/altair/state.yaml
+++ b/types/altair/state.yaml
@@ -60,7 +60,7 @@ Altair:
         type: array
         items:
           allOf:
-            - $ref: '../primitive.yaml#/Root'
+            - $ref: '../primitive.yaml#/Bytes32'
         minItems: 65536
         maxItems: 65536
       slashings:
diff --git a/types/bellatrix/block.yaml b/types/bellatrix/block.yaml
new file mode 100644
index 00000000..1972f669
--- /dev/null
+++ b/types/bellatrix/block.yaml
@@ -0,0 +1,90 @@
+Bellatrix:
+  BeaconBlockBodyCommon:
+    # An abstract object to collect the common fields between the BeaconBlockBody and the BlindedBeaconBlockBody objects
+    type: object
+    description: "The [`BeaconBlockBody`](https://github.com/ethereum/consensus-specs/blob/v1.1.9/specs/bellatrix/beacon-chain.md#beaconblockbody) object from the Eth2.0 Bellatrix spec."
+    properties:
+      randao_reveal:
+        allOf:
+          - $ref: '../primitive.yaml#/Signature'
+          - description: "The RanDAO reveal value provided by the validator."
+      eth1_data:
+        $ref: '../eth1.yaml#/Eth1Data'
+      graffiti:
+        type: string
+        pattern: "^0x[a-fA-F0-9]{64}$"
+      proposer_slashings:
+        type: array
+        items:
+          $ref: '../proposer_slashing.yaml#/ProposerSlashing'
+      attester_slashings:
+        type: array
+        items:
+          $ref: '../attester_slashing.yaml#/AttesterSlashing'
+      attestations:
+        type: array
+        items:
+          $ref: '../attestation.yaml#/Attestation'
+      deposits:
+        type: array
+        items:
+          $ref: '../deposit.yaml#/Deposit'
+      voluntary_exits:
+        type: array
+        items:
+          $ref: '../voluntary_exit.yaml#/SignedVoluntaryExit'
+      sync_aggregate:
+        $ref: '../altair/sync_aggregate.yaml#/Altair/SyncAggregate'
+
+  BeaconBlockBody:
+    allOf:
+      - $ref: '#/Bellatrix/BeaconBlockBodyCommon'
+      - type: object
+        properties:
+          execution_payload:
+            $ref: './execution_payload.yaml#/Bellatrix/ExecutionPayload'
+
+  BeaconBlock:
+    description: "The [`BeaconBlock`](https://github.com/ethereum/eth2.0-specs/blob/v1.1.9/specs/bellatrix/beacon-chain.md#beaconblock) object from the Eth2.0 Bellatrix spec."
+    allOf:
+      - $ref: '../altair/block.yaml#/Altair/BeaconBlockCommon'
+      - type: object
+        properties:
+          body:
+            $ref: '#/Bellatrix/BeaconBlockBody'
+
+  SignedBeaconBlock:
+    type: object
+    description: "The [`SignedBeaconBlock`](https://github.com/ethereum/eth2.0-specs/blob/v1.1.9/specs/bellatrix/beacon-chain.md#signedbeaconblock) object envelope from the Eth2.0 Bellatrix spec."
+    properties:
+      message:
+        $ref: "#/Bellatrix/BeaconBlock"
+      signature:
+        $ref: "../primitive.yaml#/Signature"
+
+  BlindedBeaconBlockBody:
+    description: "A variant of the [`BeaconBlockBody`](https://github.com/ethereum/consensus-specs/blob/v1.1.9/specs/bellatrix/beacon-chain.md#beaconblockbody) object from the Eth2.0 Bellatrix spec, which contains a transactions root rather than a full transactions list."
+    allOf:
+      - $ref: '#/Bellatrix/BeaconBlockBodyCommon'
+      - type: object
+        properties:
+          execution_payload_header:
+            $ref: './execution_payload.yaml#/Bellatrix/ExecutionPayloadHeader'
+
+  BlindedBeaconBlock:
+    description: "A variant of the the [`BeaconBlock`](https://github.com/ethereum/eth2.0-specs/blob/v1.1.9/specs/bellatrix/beacon-chain.md#beaconblock) object from the Eth2.0 Bellatrix spec, which contains a `BlindedBeaconBlockBody` rather than a `BeaconBlockBody`."
+    allOf:
+      - $ref: '../altair/block.yaml#/Altair/BeaconBlockCommon'
+      - type: object
+        properties:
+          body:
+            $ref: '#/Bellatrix/BlindedBeaconBlockBody'
+
+  SignedBlindedBeaconBlock:
+    type: object
+    description: "A variant of the the the [`SignedBeaconBlock`](https://github.com/ethereum/eth2.0-specs/blob/v1.1.9/specs/bellatrix/beacon-chain.md#signedbeaconblock) object envelope from the Eth2.0 Bellatrix spec, which contains a `BlindedBeaconBlock` rather than a `BeaconBlock`."
+    properties:
+      message:
+        $ref: "#/Bellatrix/BlindedBeaconBlock"
+      signature:
+        $ref: "../primitive.yaml#/Signature"
diff --git a/types/bellatrix/execution_payload.yaml b/types/bellatrix/execution_payload.yaml
new file mode 100644
index 00000000..b8b81db1
--- /dev/null
+++ b/types/bellatrix/execution_payload.yaml
@@ -0,0 +1,49 @@
+Bellatrix:
+  ExecutionPayloadCommon:
+    # An abstract object to collect the common fields between the ExecutionPayload and the ExecutionPayloadHeader objects.
+    type: object
+    description: "The [`ExecutionPayload`](https://github.com/ethereum/eth2.0-specs/blob/v1.1.9/specs/bellatrix) object from the Eth2.0 Bellatrix spec."
+    properties:
+      parent_hash:
+        $ref: '../primitive.yaml#/Root'
+      fee_recipient:
+        $ref: '../primitive.yaml#/ExecutionAddress'
+      state_root:
+        $ref: '../primitive.yaml#/Root'
+      receipts_root:
+        $ref: '../primitive.yaml#/Root'
+      logs_bloom:
+        $ref: '../primitive.yaml#/LogsBloom'
+      prev_randao:
+        $ref: '../primitive.yaml#/Bytes32'
+      block_number:
+        $ref: '../primitive.yaml#/Uint64'
+      gas_limit:
+        $ref: '../primitive.yaml#/Uint64'
+      gas_used:
+        $ref: '../primitive.yaml#/Uint64'
+      timestamp:
+        $ref: '../primitive.yaml#/Uint64'
+      extra_data:
+        $ref: '../primitive.yaml#/ExtraData'
+      base_fee_per_gas:
+        $ref: '../primitive.yaml#/Uint256'
+      block_hash:
+        $ref: '../primitive.yaml#/Root'
+
+
+  ExecutionPayload:
+    allOf:
+      - $ref: '#/Bellatrix/ExecutionPayloadCommon'
+      - type: object
+        properties:
+          transactions:
+            $ref: './transactions.yaml#/Bellatrix/Transactions'
+
+  ExecutionPayloadHeader:
+    allOf:
+      - $ref: '#/Bellatrix/ExecutionPayloadCommon'
+      - type: object
+        properties:
+          transactions_root:
+            $ref: '../primitive.yaml#/Root'
diff --git a/types/bellatrix/state.yaml b/types/bellatrix/state.yaml
new file mode 100644
index 00000000..f3d300ad
--- /dev/null
+++ b/types/bellatrix/state.yaml
@@ -0,0 +1,101 @@
+Bellatrix:
+  BeaconState:
+    type: object
+    description: "The [`BeaconState`](https://github.com/ethereum/consensus-specs/blob/v1.1.9/specs/bellatrix/beacon-chain.md#beaconstate) object from the Eth2.0 Bellatrix spec."
+    properties:
+      genesis_time:
+        $ref: "../primitive.yaml#/Uint64"
+      genesis_validators_root:
+        $ref: "../primitive.yaml#/Root"
+      slot:
+        $ref: "../primitive.yaml#/Uint64"
+      fork:
+        $ref: "../misc.yaml#/Fork"
+      latest_block_header:
+        $ref: "../block.yaml#/BeaconBlockHeader"
+      block_roots:
+        type: array
+        items:
+          allOf:
+            - $ref: '../primitive.yaml#/Root'
+        minItems: 8192
+        maxItems: 8192
+      state_roots:
+        type: array
+        items:
+          allOf:
+            - $ref: '../primitive.yaml#/Root'
+        minItems: 8192
+        maxItems: 8192
+      historical_roots:
+        type: array
+        items:
+          allOf:
+            - $ref: '../primitive.yaml#/Root'
+        maxItems: 16777216
+      eth1_data:
+        $ref: "../eth1.yaml#/Eth1Data"
+      eth1_data_votes:
+        type: array
+        items:
+          allOf:
+            - $ref: '../eth1.yaml#/Eth1Data'
+        maxItems: 1024
+      eth1_deposit_index:
+        $ref: "../primitive.yaml#/Uint64"
+      validators:
+        type: array
+        maxItems: 1099511627776
+        items:
+          allOf:
+            - $ref: '../validator.yaml#/Validator'
+      balances:
+        type: array
+        description: "Validator balances in gwei"
+        maxItems: 1099511627776
+        items:
+          allOf:
+            - $ref: '../primitive.yaml#/Uint64'
+      randao_mixes:
+        type: array
+        items:
+          allOf:
+            - $ref: '../primitive.yaml#/Bytes32'
+        minItems: 65536
+        maxItems: 65536
+      slashings:
+        type: array
+        description: "Per-epoch sums of slashed effective balances"
+        items:
+          allOf:
+            - $ref: '../primitive.yaml#/Uint64'
+        minItems: 8192
+        maxItems: 8192
+      previous_epoch_participation:
+        $ref: '../altair/epoch_participation.yaml#/Altair/EpochParticipation'
+      current_epoch_participation:
+        $ref: '../altair/epoch_participation.yaml#/Altair/EpochParticipation'
+      justification_bits:
+        type: string
+        pattern: "^0x[a-fA-F0-9]+$"
+        example: "0x01"
+        description: "Bit set for every recent justified epoch"
+      previous_justified_checkpoint:
+        $ref: "../misc.yaml#/Checkpoint"
+      current_justified_checkpoint:
+        $ref: "../misc.yaml#/Checkpoint"
+      finalized_checkpoint:
+        $ref: "../misc.yaml#/Checkpoint"
+      inactivity_scores:
+        description: "Per-validator inactivity scores. New in Altair"
+        type: array
+        maxItems: 1099511627776
+        items:
+          allOf:
+            - $ref: "../primitive.yaml#/Uint64"
+      current_sync_committee:
+        $ref: "../altair/sync_committee.yaml#/Altair/SyncCommittee"
+      next_sync_committee:
+        $ref: '../altair/sync_committee.yaml#/Altair/SyncCommittee'
+      latest_execution_payload_header:
+        $ref: './execution_payload.yaml#/Bellatrix/ExecutionPayloadHeader'
diff --git a/types/bellatrix/transactions.yaml b/types/bellatrix/transactions.yaml
new file mode 100644
index 00000000..c18bbbc9
--- /dev/null
+++ b/types/bellatrix/transactions.yaml
@@ -0,0 +1,7 @@
+Bellatrix:
+  Transactions:
+      type: array
+      items:
+        allOf:
+          - $ref: '../primitive.yaml#/Transaction'
+      maxItems: 1048576
diff --git a/types/primitive.yaml b/types/primitive.yaml
index 7d7d92c9..e339b6c4 100644
--- a/types/primitive.yaml
+++ b/types/primitive.yaml
@@ -28,6 +28,10 @@ Uint64:
   type: string
   example: "1"
 
+Uint256:
+  type: string
+  example: "1"
+
 DependentRoot:
   allOf:
     - $ref: "./primitive.yaml#/Root"
@@ -44,6 +48,11 @@ Root:
   example: "0xcf8e0d4e9587369b2301d0790347320302cc0943d5a1884560367e8208d920f2"
   pattern: "^0x[a-fA-F0-9]{64}$"
 
+Bytes32:
+  type: string
+  example: "0xcf8e0d4e9587369b2301d0790347320302cc0943d5a1884560367e8208d920f2"
+  pattern: "^0x[a-fA-F0-9]{64}$"
+
 Graffiti:
   type: string
   format: hex
@@ -70,3 +79,20 @@ ExecutionAddress:
   description: "An address on the execution (Ethereum 1) network."
   example: "0xabcf8e0d4e9587369b2301d0790347320302cc09"
   pattern: "^0x[a-fA-F0-9]{40}$"
+
+Transaction:
+  type: string
+  description: "A transaction on the execution (Ethereum 1) network."
+  example: "0x02f878831469668303f51d843b9ac9f9843b9aca0082520894c93269b73096998db66be0441e836d873535cb9c8894a19041886f000080c001a031cc29234036afbf9a1fb9476b463367cb1f957ac0b919b69bbc798436e604aaa018c4e9c3914eb27aadd0b91e10b18655739fcf8c1fc398763a9f1beecb8ddc86"
+  pattern: "^0x[a-fA-F0-9]{0,2147483648}$"
+
+ExtraData:
+  type: string
+  description: "Extra data on the execution (Ethereum 1) network."
+  example: "0xcf8e0d4e9587369b2301d0790347320302cc0943d5a1884560367e8208d920f2"
+  pattern: "^0x[a-fA-F0-9]{0,64}$"
+
+LogsBloom:
+  type: string
+  example: "0x00000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000"
+  pattern: "^0x[a-fA-F0-9]{512}$"
diff --git a/types/state.yaml b/types/state.yaml
index 40688db6..11888041 100644
--- a/types/state.yaml
+++ b/types/state.yaml
@@ -59,7 +59,7 @@ BeaconState:
       type: array
       items:
         allOf:
-          - $ref: './primitive.yaml#/Root'
+          - $ref: './primitive.yaml#/Bytes32'
       minItems: 65536
       maxItems: 65536
     slashings: