<!-- 0Gkit docs — CHAIN_NONCE_TOO_LOW
     Source: https://docs.0gkit.com/errors/CHAIN_NONCE_TOO_LOW
     LLM-friendly Markdown twin of the page. -->

# CHAIN_NONCE_TOO_LOW

**Nonce already used**

## What happened

The nonce on the outgoing transaction is lower than the account's on-chain nonce. Usually means a previous tx with the same nonce already confirmed.

## How to fix

Refetch the nonce via `eth_getTransactionCount` and retry. Most wallets do this automatically; if you're managing nonces yourself, sync after every send.

## Example

```ts
import { createClient } from "viem";
const nonce = await client.getTransactionCount({ address });
```

## Reference

- Namespace: `CHAIN`
- Help URL: `https://0gkit.com/errors/CHAIN_NONCE_TOO_LOW`
- See also: [all error codes](/errors)