How Transaction Replacement Speeds a Stuck Payment

Transaction replacement speeds a stuck payment by resubmitting the same nonce with a higher fee bid, giving validators a reason to include it sooner.

For a bridge transaction, Manta Bridge transfers use that same source-chain mechanism.

What is actually stuck?

The stuck part is usually the source-chain transaction sitting in a node’s transaction pool, not the tokens themselves. An EVM account sends transactions in nonce order, so a low-fee transaction can remain pending while later transactions wait behind it. The wallet may show “pending” even after another node has dropped the transaction, which makes a block explorer the first place to check.

A transaction that is already confirmed cannot be replaced. This distinction matters for bridges: once the source-chain contract call is mined, a fee bump cannot speed up destination-chain confirmation, message relaying, or final settlement. Replacement applies only before the original transaction is included.

Why a higher fee works

A replacement is a competing transaction from the same account with the same nonce. Only one transaction using that nonce can be included, so the node can discard the older version when the new one meets its replacement rules.

On EIP-1559 networks, the relevant numbers are the max priority fee and max fee per gas. The priority fee is the tip offered to the block producer; the max fee is the ceiling covering both that tip and the changing base fee. Raising the gas limit does not make a transaction move faster. It only reserves more execution capacity, and setting it too low can make a bridge call fail.

There is no universal bump percentage across every network or node, but a 10% increase is a common minimum policy. MetaMask Wallet’s practical guidance is to raise the priority fee by at least 10% and the max fee by roughly 30% over the pending transaction. For example, a replacement could move a 30-gwei priority fee to 33–35 gwei and a 150-gwei max fee toward 200 gwei. The actual amount paid is normally lower than the max fee; it is a ceiling, not an automatic charge.

How to replace the transaction

1. Confirm that the transaction is still pending on the correct source network. Record its nonce, destination contract, value, calldata, and current fee settings.
2. Check for older pending nonces from the same address. The lowest unresolved nonce must be handled first, because a replacement for nonce 12 will not clear a blocked nonce 11.
3. Use MetaMask Wallet’s Speed up option, or send an advanced replacement manually. Keep the same nonce, recipient, value, and calldata when the goal is to complete the original bridge call. Increase both fee fields and keep the gas limit comparable to, or slightly above, the original.
4. Sign and submit the replacement, then track its new hash. If the node returns “replacement transaction underpriced,” increase the fee again. The account also needs enough native token to cover the replacement’s maximum possible fee.

To abandon the payment instead, send zero native token to your own address with the same nonce and a sufficiently higher fee. That cancellation only works if it is mined before the original, and it must be done in nonce order.

The same rule applies whether the request began in Manta Bridge, Orbiter Finance, or Symbiosis Finance: replace the wallet’s source transaction, not the bridge request by submitting a second one. Replacement is the right fix for a genuinely pending low-fee transaction; once the source call is confirmed, the remaining delay belongs to the bridge’s cross-chain process and needs a status check there.