eth_getUncleCountByBlockHash — Elysium JSON-RPC

Return the uncle count of a block.

POSThttps://triport.io/rpc/elysium

Network: Elysium mainnet (chain ID 99901)
Scope: elysium:rpc
Auth: X-API-Key: $TRIPORT_API_KEY
Rate limit: elysium_read_rpc - 5 / 10 / 25 / 40 / 40 RPS sustained (Free / Basic / Pro / Business / Enterprise; BE5, 2026-11-08); Limits

Endpoint and plans: Elysium RPC endpoint.

Terms on this page: Chain ID · JSON-RPC · Sequencer.

Request

cURLJavaScriptPython

upstream_observed

curl https://triport.io/rpc/elysium \
  -H "X-API-Key: $TRIPORT_API_KEY" \
  -H "Content-Type: application/json" \
  -d '{"jsonrpc":"2.0","id":1,"method":"eth_getUncleCountByBlockHash","params":["0xc919128f94468931868392eaaad656f740d799155c8c8359158a9f5bb1a68046"]}'

const res = await fetch("https://triport.io/rpc/elysium", {
  method: "POST",
  headers: {
    "X-API-Key": process.env.TRIPORT_API_KEY,
    "Content-Type": "application/json",
  },
  body: JSON.stringify({
    "jsonrpc": "2.0",
    "id": 1,
    "method": "eth_getUncleCountByBlockHash",
    "params": [
      "0xc919128f94468931868392eaaad656f740d799155c8c8359158a9f5bb1a68046"
    ]
  }),
});
const data = await res.json();
console.log(data);

import os


import requests


resp = requests.post(
    "https://triport.io/rpc/elysium",
    headers={
        "X-API-Key": os.environ["TRIPORT_API_KEY"],
        "Content-Type": "application/json",
    },
    json={
        "jsonrpc": "2.0",
        "id": 1,
        "method": "eth_getUncleCountByBlockHash",
        "params": [
            "0xc919128f94468931868392eaaad656f740d799155c8c8359158a9f5bb1a68046",
        ],
    },
)
data = resp.json()
print(data)

Response

JSON

Example

{
  "jsonrpc": "2.0",
  "id": 1,
  "result": "0x0"
}

eth_getUncleCountByBlockHash — return the uncle count of a block. Elysium is an Arbitrum Orbit L2 (chain ID 99901) that pays gas in HYPE; the signature and response shape come from the Elysium OpenRPC contract.

Behaviour follows the standard EVM JSON-RPC semantics for this method.

Parameters

JSON-RPC params is a positional array.

blockHashHashrequired

32-byte block hash.

Response

Measured 2026-11-08 on Elysium mainnet; captured values in a reconstructed JSON-RPC envelope, not a captured Triport response.

On Elysium

On Elysium this always comes back as 0x0. The chain is an Arbitrum Orbit rollup ordered by one sequencer, and ordering by a sequencer leaves no competing blocks to be included later as ommers. The capture used the hash 0xc919…8046 and returned zero, as expected.

Selecting by hash is the right form when your pipeline already stores block hashes, for instance when replaying a saved block list or cross-checking an explorer export. If you only track numbers, the by-number variant is equivalent and avoids a hash lookup on your side.

For an Elysium-only consumer the call carries no information and can be skipped. Keep it only where shared multi-chain code expects the field. Pairing it with eth_getBlockByHash is the way to confirm that the hash belongs to a block the node actually knows.

Errors

See Elysium errors. Inspect the code and message together.

Code	Meaning	Action
-32601	Method unavailable	Check the documented method set. A method outside it is rejected earlier with HTTP 403 `method_unknown`.
-32602	Invalid parameters	Correct the request.
-32005	Request limit exceeded	Arrives with HTTP 429: back off and honor Retry-After; see Limits.
-32000	Upstream unavailable	Retry reads with bounded backoff.
HTTP 429 `rate_limited`	Plan RPS exceeded (plain HTTP error, not JSON-RPC)	Honor Retry-After; see Limits.

Examples

JavaScript

const response = await fetch("https://triport.io/rpc/elysium", {
  method: "POST",
  headers: { "X-API-Key": process.env.TRIPORT_API_KEY, "Content-Type": "application/json" },
  body: JSON.stringify({"jsonrpc":"2.0","id":1,"method":"eth_getUncleCountByBlockHash","params":["0xc919128f94468931868392eaaad656f740d799155c8c8359158a9f5bb1a68046"]}),
});
const payload = await response.json();

Notes

The result is the view of the healthy node that answered; adjacent calls are not pinned to one node.
For transaction submission, see eth_sendRawTransaction (live). The Triport contract excludes net_listening, net_peerCount, txpool_*, debug_* and trace_*: they are rejected with HTTP 403 method_unknown; see unsupported methods.

eth_accounts · eth_blobBaseFee · eth_blockNumber

Limits · Errors

Parameters

Response

On Elysium

Errors

Examples

Notes

Related