From 01fcea702e32e1f97a0aa351b6623d94dc0fbcea Mon Sep 17 00:00:00 2001
From: Nico Flaig <nflaig@protonmail.com>
Date: Wed, 30 Oct 2024 10:36:41 +0000
Subject: [PATCH] Use ssz type to handle json serialization

Default parsing can't handle BigInt
---
 packages/api/src/keymanager/routes.ts | 37 +++++++++++++++++----------
 1 file changed, 24 insertions(+), 13 deletions(-)

diff --git a/packages/api/src/keymanager/routes.ts b/packages/api/src/keymanager/routes.ts
index f91beccce80..4d04049f9bd 100644
--- a/packages/api/src/keymanager/routes.ts
+++ b/packages/api/src/keymanager/routes.ts
@@ -1,7 +1,8 @@
 import {ContainerType, ValueOf} from "@chainsafe/ssz";
 import {ChainForkConfig} from "@lodestar/config";
 import {Epoch, phase0, ssz, stringType} from "@lodestar/types";
-import {Schema, Endpoint, RouteDefinitions} from "../utils/index.js";
+import {RecursivePartial} from "@lodestar/utils";
+import {Schema, Endpoint, RouteDefinitions, ResponseDataCodec} from "../utils/index.js";
 import {WireFormat} from "../utils/wireFormat.js";
 import {
   EmptyArgs,
@@ -90,11 +91,28 @@ export const BuilderBoostFactorDataType = new ContainerType(
   },
   {jsonCase: "eth2"}
 );
+export const ProposerConfigType = new ContainerType(
+  {
+    graffiti: stringType,
+    strictFeeRecipientCheck: ssz.Boolean,
+    feeRecipient: stringType,
+    builder: new ContainerType(
+      {
+        gasLimit: ssz.UintNum64,
+        selection: stringType,
+        boostFactor: ssz.UintBn64,
+      },
+      {jsonCase: "eth2"}
+    ),
+  },
+  {jsonCase: "eth2"}
+);
 
 export type FeeRecipientData = ValueOf<typeof FeeRecipientDataType>;
 export type GraffitiData = ValueOf<typeof GraffitiDataType>;
 export type GasLimitData = ValueOf<typeof GasLimitDataType>;
 export type BuilderBoostFactorData = ValueOf<typeof BuilderBoostFactorDataType>;
+export type ProposerConfig = RecursivePartial<ValueOf<typeof ProposerConfigType>>;
 
 export type SignerDefinition = {
   pubkey: PubkeyHex;
@@ -109,17 +127,6 @@ export type SignerDefinition = {
 
 export type RemoteSignerDefinition = Pick<SignerDefinition, "pubkey" | "url">;
 
-export type ProposerConfig = {
-  graffiti?: string;
-  strictFeeRecipientCheck?: boolean;
-  feeRecipient?: string;
-  builder?: {
-    gasLimit?: number;
-    selection?: string;
-    boostFactor?: bigint;
-  };
-};
-
 /**
  * JSON serialized representation of a single keystore in EIP-2335: BLS12-381 Keystore format.
  * ```
@@ -665,7 +672,11 @@ export function getDefinitions(_config: ChainForkConfig): RouteDefinitions<Endpo
           params: {pubkey: Schema.StringRequired},
         },
       },
-      resp: JsonOnlyResponseCodec,
+      resp: {
+        onlySupport: WireFormat.json,
+        data: ProposerConfigType as ResponseDataCodec<ProposerConfig, EmptyMeta>,
+        meta: EmptyMetaCodec,
+      },
     },
 
     signVoluntaryExit: {