{"record":{"id":"08a181d2cbd241c5","repo":"FuelLabs/fuels-ts","slug":"response-body-empty","errorCode":"RESPONSE_BODY_EMPTY","errorMessage":"The response from the server is missing the body","messagePattern":"The response from the server is missing the body","errorType":"exception","errorClass":"FuelError","httpStatus":null,"severity":"error","filePath":"packages/account/src/providers/provider.ts","lineNumber":571,"sourceCode":"      const signal = timeout ? AbortSignal.timeout(timeout) : undefined;\n\n      let fullRequest: RequestInit = {\n        ...request,\n        signal,\n        headers: { ...request?.headers, ...headers },\n      };\n\n      if (options.requestMiddleware) {\n        fullRequest = await options.requestMiddleware(fullRequest);\n      }\n\n      if (Provider.ENABLE_RPC_CONSISTENCY && Provider.hasWriteOperationHappened(url)) {\n        Provider.applyBlockHeight(fullRequest, url);\n      }\n\n      const response = await Provider.fetchAndProcessBlockHeight(url, fullRequest, options);\n      if (response.body === null) {\n        throw new FuelError(\n          ErrorCode.RESPONSE_BODY_EMPTY,\n          'The response from the server is missing the body',\n          { timestamp: new Date().toISOString(), request, response }\n        );\n      }\n\n      return response;\n    }, retryOptions);\n  }\n\n  private static applyBlockHeight(request: RequestInit, url: string) {\n    const normalizedUrl = this.normalizeUrl(url);\n\n    // Apply the block height to the request\n    const currentBlockHeight = Provider.currentBlockHeightCache[normalizedUrl] ?? 0;\n    request.body = request.body\n      ?.toString()\n      .replace(/}$/, `,\"extensions\":{\"required_fuel_block_height\":${currentBlockHeight}}}`);","sourceCodeStart":553,"sourceCodeEnd":589,"githubUrl":"https://github.com/FuelLabs/fuels-ts/blob/b3f37c91aca4aa9d5e4c0d3967f66237190826ea/packages/account/src/providers/provider.ts#L553-L589","documentation":"Thrown by Provider's fetch wrapper when the HTTP response from the node has response.body === null. The SDK needs a body to parse the JSON-RPC response; a null body means the server returned a response with no content (e.g. a network error, a redirect, or a misconfigured gateway) and there is nothing to decode.","triggerScenarios":"The node URL returns a 200/204 with empty body; a reverse proxy returns a response with no body (e.g. a redirect or auth challenge); the connection was closed mid-response yielding a null stream; calling Provider operations against a URL that serves an HTML page instead of the RPC endpoint.","commonSituations":"Wrong provider URL (pointing at a web UI, status page, or load balancer root instead of /v1/graphql); proxy/gateway strip the body on auth failure; CORS preflight in browsers returning an opaque response; node crashed mid-request; HTTP/2 reset.","solutions":["Verify the provider URL points to the fuel-core GraphQL endpoint (typically http(s)://host/v1/graphql).","Test the URL with curl: a healthy node returns JSON, not HTML or empty.","Check intermediate proxies/gateways for body-stripping on errors; inspect response.status and headers captured in the error metadata.","Ensure network connectivity to the node and that the node process is running."],"exampleFix":"// before\nconst provider = new Provider('https://my-node.example.com'); // wrong path\n\n// after — point at the actual RPC endpoint\nconst provider = new Provider('https://my-node.example.com/v1/graphql');\n\n// also verify with curl:\n// curl -sS -X POST https://my-node.example.com/v1/graphql -H 'content-type: application/json' -d '{\"query\":\"{chain{latestBlock{height}}}\"}'","handlingStrategy":"validation","validationCode":"// Validate the RPC URL responds with a JSON body before constructing workflows.\nasync function assertRpcReachable(url: string) {\n  const res = await fetch(url, {\n    method: 'POST',\n    headers: { 'content-type': 'application/json' },\n    body: JSON.stringify({ query: '{ chain { latestBlock { height } } }' }),\n  });\n  if (res.body === null) throw new Error(`No response body from ${url}; check the endpoint.`);\n}","typeGuard":"function isJsonRpcUrl(url: string): boolean {\n  try { new URL(url); return true; } catch { return false; }\n}","tryCatchPattern":"import { FuelError, ErrorCode } from '@fuel-ts/errors';\ntry {\n  await provider.call(...);\n} catch (e) {\n  if (e instanceof FuelError && e.code === ErrorCode.RESPONSE_BODY_EMPTY) {\n    // verify the URL/endpoint and node reachability\n  }\n  throw e;\n}","preventionTips":["Point the Provider at the /v1/graphql endpoint, not a web UI root.","Smoke-test the URL with curl before integrating.","Ensure no proxy strips the body on auth/error responses."],"tags":["network","provider","rpc","http"],"backgroundTag":null,"analyzedSha":"b3f37c91aca4aa9d5e4c0d3967f66237190826ea","analyzedAt":"2026-08-12T20:30:56.448Z","schemaVersion":2},"datasetVersion":"2026-08-12T23:17:12.415Z"}