Cancel Stuck Ethereum Transactions with Nonce Overwrite and Txpool Lifetime Tweaks

Nonce Overwrite

In Ethereum, the nonce determines the order of transactions from an account. When a transaction is sent with a low gas price, miners may ignore it, leaving it stuck in the pool. To replace such a transaction, you can resend the same transaction with a higher gas price while keeping the same nonce. This works only if you control the nonce yourself; if the node (e.g., geth) auto‑assigns the nonce, you must explicitly set the original nonce when resending.

Solution Steps

Identify the nonce of the pending transaction.

Resend the transaction with the same nonce but a higher gas price.

Ensure the node does not auto‑increment the nonce for you.

Queue Expiration (Txpool Lifetime)

Problem Scenario

If a transaction stays pending for a long time and you prefer it to become invalid rather than repeatedly rebroadcasting, you can let the transaction expire from the node’s transaction pool. This is useful when many transactions are queued due to nonce mis‑management.

Solution

Geth provides a --txpool.lifetime flag that defines how long non‑executable transactions remain in the pool before being dropped. The default is three hours.

--txpool.lifetime value  Maximum amount of time non‑executable transaction are queued (default: 3h0m0s)

To force earlier expiration, set a shorter lifetime, restart the node, wait for the pending transactions to be removed, then restore the original lifetime value and restart again.

Default TxPool Configuration (Source Code)

var DefaultTxPoolConfig = TxPoolConfig{

Journal:      "transactions.rlp",

Rejournal:    time.Hour,

PriceLimit:   1,

PriceBump:    10,

AccountSlots: 16,

GlobalSlots:  4096,

AccountQueue: 64,

GlobalQueue:  1024,

Lifetime:     3 * time.Hour,

}

The final line confirms that the default Lifetime is three hours.