Add proposer duties v2 endpoint

Author: nflaig

CHANGES.md

@@ -8,6 +8,8 @@ There are likely to be descriptions etc outside of the list below, but new query
 
 | Endpoint                                                                                                            | [Lighthouse](https://github.com/sigp/lighthouse) | [Lodestar](https://github.com/ChainSafe/lodestar) | [Nimbus](https://github.com/status-im/nimbus-eth2) | [Prysm](https://github.com/prysmaticlabs/prysm) | [Teku](https://github.com/ConsenSys/teku) |
 |---------------------------------------------------------------------------------------------------------------------|--------------------------------------------------|---------------------------------------------------|----------------------------------------------------|-------------------------------------------------|-------------------------------------------|
+| [#562](https://github.com/ethereum/beacon-APIs/pull/562) `GET /eth/v2/validator/duties/proposer/{epoch}` added         |                                                  |                                                  |                                                    |                                                 |                                           |
+| [#562](https://github.com/ethereum/beacon-APIs/pull/562) `GET /eth/v1/validator/duties/proposer/{epoch}` deprecated         |                                                  |                                                  |                                                    |                                                 |                                           |
 
 The Following are no longer in the Standard API, removed since the latest version.
 

apis/validator/duties/proposer.v2.yaml

@@ -0,0 +1,70 @@
+get:
+  tags:
+    - ValidatorRequiredApi
+    - Validator
+  summary: "Get block proposers duties"
+  operationId: "getProposerDutiesV2"
+  description: "Request beacon node to provide all validators that are scheduled to propose a block in the given epoch.
+
+    Duties should only need to be checked once per epoch,
+    however a chain reorganization could occur that results in a change of duties. For full safety,
+    you should monitor head events and confirm the dependent root in this response matches. After Fulu,
+    different checks need to be performed as the dependent root changes due to deterministic proposer lookahead.
+
+
+    Before Fulu:
+
+     - event.current_duty_dependent_root when `compute_epoch_at_slot(event.slot) == epoch`
+
+     - event.block otherwise
+
+     - dependent_root value is `get_block_root_at_slot(state, compute_start_slot_at_epoch(epoch) - 1)`
+
+
+    After Fulu:
+
+     - event.previous_duty_dependent_root when `compute_epoch_at_slot(event.slot) == epoch`
+
+     - event.block otherwise
+
+     - dependent_root value is `get_block_root_at_slot(state, compute_start_slot_at_epoch(epoch - 1) - 1)`
+
+
+    The dependent_root value is the genesis block root in the case of underflow."
+  parameters:
+    - name: epoch
+      in: path
+      required: true
+      schema:
+        $ref: '../../../beacon-node-oapi.yaml#/components/schemas/Uint64'
+  responses:
+    "200":
+      description: Success response
+      content:
+        application/json:
+          schema:
+            title: GetProposerDutiesResponse
+            type: object
+            required: [dependent_root, execution_optimistic, data]
+            properties:
+              dependent_root:
+                $ref: "../../../beacon-node-oapi.yaml#/components/schemas/DependentRoot"
+              execution_optimistic:
+                $ref: "../../../beacon-node-oapi.yaml#/components/schemas/ExecutionOptimistic"
+              data:
+                type: array
+                items:
+                  $ref: "../../../beacon-node-oapi.yaml#/components/schemas/ProposerDuty"
+    "400":
+      description: "Invalid epoch"
+      content:
+        application/json:
+          schema:
+            $ref: "../../../beacon-node-oapi.yaml#/components/schemas/ErrorMessage"
+          example:
+            code: 400
+            message: "Invalid epoch: -2"
+    "500":
+      $ref: '../../../beacon-node-oapi.yaml#/components/responses/InternalError'
+    "503":
+      $ref: '../../../beacon-node-oapi.yaml#/components/responses/CurrentlySyncing'

apis/validator/duties/proposer.yaml

@@ -3,6 +3,7 @@ get:
     - ValidatorRequiredApi
     - Validator
   summary: "Get block proposers duties"
+  deprecated: true
   operationId: "getProposerDuties"
   description: "Request beacon node to provide all validators that are scheduled to propose a block in the given epoch.
 

beacon-node-oapi.yaml

@@ -178,6 +178,8 @@ paths:
     $ref: "./apis/validator/duties/attester.yaml"
   /eth/v1/validator/duties/proposer/{epoch}:
     $ref: "./apis/validator/duties/proposer.yaml"
+  /eth/v2/validator/duties/proposer/{epoch}:
+    $ref: "./apis/validator/duties/proposer.v2.yaml"
   /eth/v1/validator/duties/sync/{epoch}:
     $ref: "./apis/validator/duties/sync.yaml"
   /eth/v3/validator/blocks/{slot}: