graphql: add withdrawals (EIP-4895) (ethereum#400)

* graphql: add withdrawals

* rm block field

* Apply suggestions

Co-authored-by: lightclient <14004106+lightclient@users.noreply.github.com>

* fix comments in graphqls doc

* typo

---------

Co-authored-by: lightclient <14004106+lightclient@users.noreply.github.com>

Author: s1na

graphql.json

@@ -766,6 +766,38 @@
             },
             "isDeprecated": false,
             "deprecationReason": null
+          },
+          {
+            "name": "withdrawalsRoot",
+            "description": "WithdrawalsRoot is the withdrawals trie root in this block.\nIf withdrawals are unavailable for this block, this field will be null.",
+            "args": [],
+            "type": {
+              "kind": "SCALAR",
+              "name": "Bytes32",
+              "ofType": null
+            },
+            "isDeprecated": false,
+            "deprecationReason": null
+          },
+          {
+            "name": "withdrawals",
+            "description": "Withdrawals is a list of withdrawals associated with this block. If\nwithdrawals are unavailable for this block, this field will be null.",
+            "args": [],
+            "type": {
+              "kind": "LIST",
+              "name": null,
+              "ofType": {
+                "kind": "NON_NULL",
+                "name": null,
+                "ofType": {
+                  "kind": "OBJECT",
+                  "name": "Withdrawal",
+                  "ofType": null
+                }
+              }
+            },
+            "isDeprecated": false,
+            "deprecationReason": null
           }
         ],
         "inputFields": null,
@@ -2131,6 +2163,81 @@
         "enumValues": null,
         "possibleTypes": null
       },
+      {
+        "kind": "OBJECT",
+        "name": "Withdrawal",
+        "description": "EIP-4895",
+        "fields": [
+          {
+            "name": "index",
+            "description": "Index is a monotonically increasing identifier issued by consensus layer.",
+            "args": [],
+            "type": {
+              "kind": "NON_NULL",
+              "name": null,
+              "ofType": {
+                "kind": "SCALAR",
+                "name": "Long",
+                "ofType": null
+              }
+            },
+            "isDeprecated": false,
+            "deprecationReason": null
+          },
+          {
+            "name": "validator",
+            "description": "Validator is index of the validator associated with withdrawal.",
+            "args": [],
+            "type": {
+              "kind": "NON_NULL",
+              "name": null,
+              "ofType": {
+                "kind": "SCALAR",
+                "name": "Long",
+                "ofType": null
+              }
+            },
+            "isDeprecated": false,
+            "deprecationReason": null
+          },
+          {
+            "name": "address",
+            "description": "Recipient address of the withdrawn amount.",
+            "args": [],
+            "type": {
+              "kind": "NON_NULL",
+              "name": null,
+              "ofType": {
+                "kind": "SCALAR",
+                "name": "Address",
+                "ofType": null
+              }
+            },
+            "isDeprecated": false,
+            "deprecationReason": null
+          },
+          {
+            "name": "amount",
+            "description": "Amount is the withdrawal value in Gwei.",
+            "args": [],
+            "type": {
+              "kind": "NON_NULL",
+              "name": null,
+              "ofType": {
+                "kind": "SCALAR",
+                "name": "Long",
+                "ofType": null
+              }
+            },
+            "isDeprecated": false,
+            "deprecationReason": null
+          }
+        ],
+        "inputFields": null,
+        "interfaces": [],
+        "enumValues": null,
+        "possibleTypes": null
+      },
       {
         "kind": "OBJECT",
         "name": "__Directive",

schema.graphqls

@@ -32,7 +32,9 @@ type Account {
   storage(slot: Bytes32!): Bytes32!
 }
 
-"""Address is a 20 byte Ethereum address, represented as 0x-prefixed hexadecimal."""
+"""
+Address is a 20 byte Ethereum address, represented as 0x-prefixed hexadecimal.
+"""
 scalar Address
 
 """
@@ -185,6 +187,18 @@ type Block {
 
   """Raw is the RLP encoding of the block."""
   raw: Bytes!
+
+  """
+  WithdrawalsRoot is withdrawals trie root in this block.
+  If withdrawals are unavailable for this block, this field will be null.
+  """
+  withdrawalsRoot: Bytes32
+
+  """
+  Withdrawals is a list of withdrawals associated with this block. If
+  withdrawals are unavailable for this block, this field will be null.
+  """
+  withdrawals: [Withdrawal!]
 }
 
 """
@@ -220,7 +234,9 @@ An empty byte string is represented as '0x'. Byte strings must have an even numb
 """
 scalar Bytes
 
-"""Bytes32 is a 32 byte binary string, represented as 0x-prefixed hexadecimal."""
+"""
+Bytes32 is a 32 byte binary string, represented as 0x-prefixed hexadecimal.
+"""
 scalar Bytes32
 
 """
@@ -537,3 +553,20 @@ type Transaction {
   """
   rawReceipt: Bytes!
 }
+
+"""EIP-4895"""
+type Withdrawal {
+  """
+  Index is a monotonically increasing identifier issued by consensus layer.
+  """
+  index: Long!
+
+  """Validator is index of the validator associated with withdrawal."""
+  validator: Long!
+
+  """Recipient address of the withdrawn amount."""
+  address: Address!
+
+  """Amount is the withdrawal value in Gwei."""
+  amount: Long!
+}