feat: stacks core event and rpc proxy body limits configurable via env (hirosystems#2278)

Author: rafaelcr

.env

@@ -72,6 +72,9 @@ PG_APPLICATION_NAME=stacks-blockchain-api
 STACKS_CORE_EVENT_PORT=3700
 STACKS_CORE_EVENT_HOST=127.0.0.1
 
+# Stacks core event payload body size limit. Defaults to 500MB.
+# STACKS_CORE_EVENT_BODY_LIMIT=500000000
+
 STACKS_BLOCKCHAIN_API_PORT=3999
 STACKS_BLOCKCHAIN_API_HOST=127.0.0.1
 
@@ -81,6 +84,9 @@ STACKS_CORE_RPC_PORT=20443
 # STACKS_CORE_PROXY_HOST=127.0.0.1
 # STACKS_CORE_PROXY_PORT=20443
 
+# Stacks core RPC proxy body size limit. Defaults to 10MB.
+# STACKS_CORE_PROXY_BODY_LIMIT=10000000
+
 # Configure a path to a file containing additional stacks-node `POST /v2/tranascation` URLs for the /v2 proxy to mutlicast.
 # The file should be a newline-delimited list of URLs.
 # STACKS_API_EXTRA_TX_ENDPOINTS_FILE=./config/extra-tx-post-endpoints.txt

src/api/routes/core-node-rpc-proxy.ts

@@ -254,10 +254,12 @@ export const CoreNodeRpcProxyRouter: FastifyPluginAsync<
     });
   }
 
-  const maxBodySize = 10_000_000; // 10 MB max POST body size
   fastify.addContentTypeParser(
     'application/octet-stream',
-    { parseAs: 'buffer', bodyLimit: maxBodySize },
+    {
+      parseAs: 'buffer',
+      bodyLimit: parseInt(process.env['STACKS_CORE_PROXY_BODY_LIMIT'] ?? '10000000'),
+    },
     (_req, body, done) => {
       done(null, body);
     }

src/event-stream/event-server.ts

@@ -784,8 +784,6 @@ export async function startEventServer(opts: {
     eventHost = hostname;
   }
 
-  const bodyLimit = 1_000_000 * 500; // 500MB body limit
-
   const reqLogSerializer = (req: FastifyRequest) => ({
     method: req.method,
     url: req.url,
@@ -812,7 +810,7 @@ export async function startEventServer(opts: {
   };
 
   const app = Fastify({
-    bodyLimit,
+    bodyLimit: parseInt(process.env['STACKS_CORE_EVENT_BODY_LIMIT'] ?? '500000000'),
     trustProxy: true,
     logger: loggerOpts,
     ignoreTrailingSlash: true,