RPC method

eth_getTransactionCount on Fantom

Supported on SwiftNodes

Everything below was measured on 2026-10-13 by calling eth_getTransactionCount on Fantom through the same endpoint customers use, and is re-measured weekly.

What eth_getTransactionCount does

Returns the number of transactions an address has sent, which is the nonce its next transaction must use. With the pending tag it also counts the address's transactions waiting in the node's mempool.

eth_getTransactionCount on Fantom: what we measured

On an address that had just sent a transaction in the latest block (0x6b3b6681a15732b8c7f39ad3e21c10d8bea33029):

"latest"	3,524
"pending"	3,524

Which tag to use

"pending" equalled "latest" for this address when we read it. Use "pending" for the next nonce anyway: it covers your own transactions that are sent but not yet mined. On a chain with a few seconds per block, sending twice in one block is common.

Example request

curl -s https://rpc.swiftnodes.io/rpc/fantom?key=YOUR_API_KEY \
  -X POST -H "Content-Type: application/json" \
  -d '{"jsonrpc":"2.0","id":1,"method":"eth_getTransactionCount","params":["0x6b3b6681a15732b8c7f39ad3e21c10d8bea33029","pending"]}'

import { createPublicClient, http } from "viem";

const client = createPublicClient({
  transport: http("https://rpc.swiftnodes.io/rpc/fantom?key=YOUR_API_KEY"),
});

const nonce = await client.getTransactionCount({ address, blockTag: "pending" });

// Sending several transactions: let viem track nonces locally
import { nonceManager, privateKeyToAccount } from "viem/accounts";
const account = privateKeyToAccount(key, { nonceManager });

Other methods on Fantom

eth_getTransactionCount on other chains

Frequently asked questions

Does Fantom support eth_getTransactionCount?

Yes. eth_getTransactionCount answered on the SwiftNodes Fantom endpoint when our weekly probe called it through the customer path (2026-10-13).

How do I get the next nonce on Fantom?

eth_getTransactionCount(address, "pending"). For several transactions in a row, increment locally.

Fantom endpoints, live block height and WebSocket status are on the Fantom RPC page.

One key covers every chain we serve, and SwiftNodes has a free tier.