eth_getBlockTransactionCountByNumber — Elysium JSON-RPC

Return the transaction 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.

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_getBlockTransactionCountByNumber","params":["0x270775"]}'

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_getBlockTransactionCountByNumber",
    "params": [
      "0x270775"
    ]
  }),
});
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_getBlockTransactionCountByNumber",
        "params": [
            "0x270775",
        ],
    },
)
data = resp.json()
print(data)

Response

JSON

Example

{
  "jsonrpc": "2.0",
  "id": 1,
  "result": "0x3"
}

eth_getBlockTransactionCountByNumber — return the transaction 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.

The number of transactions in a block selected by number or tag.

Parameters

JSON-RPC params is a positional array.

blockNumberBlockTagrequired

Block number in hex, or a tag such as latest.

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 the first transaction of every block is an ArbOS internal transaction (type 0x6a), so the smallest count you will see on a produced block is 0x1. The captured block 0x270775 reported 0x3: one system transaction and two signed transactions.

Use this method as a pre-filter when you sweep heights. Because Elysium produces about ten blocks per second, most blocks in a quiet period hold only the system entry; fetching the count first and skipping blocks with 0x1 saves the larger eth_getBlockByNumber call with full transactions.

Pass an explicit hex height when you need repeatable results. With latest the head changes between your count call and the following read, so the block you counted may not be the block you fetch next. Store the height you used together with the count.

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_getBlockTransactionCountByNumber","params":["0x270775"]}),
});
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