What Is a Nonce?
On Ethereum-style chains, a nonce is a simple counter: your first transaction is 0, the next is 1, and so on. The network will not process 7 until 6 is in a block. That is how it stops replay and keeps order. It is also why one cheap, stuck transaction can freeze everything you try to send after it.
How It Actually Works
- Wallets usually hide the nonce. When a transaction sits in the mempool with a fee that is too low, every later send waits behind it.
- The fix is to replace the stuck transaction: same nonce, higher fee, sometimes a 0-value send to yourself. "Speed up" and "cancel" in wallets are this trick.
- Bitcoin does not use an account nonce. It spends specific UTXOs. Different stuck-transaction tools. Do not paste Ethereum advice into a Bitcoin wallet.
Risks and Common Mistakes
- Broadcasting the same send over and over, creating a pile of pending nonces. One replacement is the move.
- Custom-nonce toys in advanced settings. Off-by-one here can strand funds until you understand the queue.
- Phishing "nonce fix" sites. There is no website that unsticks a nonce for you. That is a drainer.
When It Matters
The first time a wallet says pending forever. Check an explorer, replace the nonce, raise the fee. The Etherscan review is the lookup.
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