Ethereum symbol above a secure collateral gateway in a bright yellow-orange network

Puffer and Google Cloud Want Collateral to Make Ethereum Feel Instant

By Isaac • September 27, 2026 8:38 am • Comments

Ethereum does not settle transactions instantly. Puffer and Google Cloud are testing a way to make applications feel much closer to instant by putting financial collateral behind an early promise about what a transaction will do.

The idea is called a preconfirmation. Instead of forcing an app to wait for Ethereum’s full settlement process, a gateway can commit to a specific result in advance.

If the operator breaks that promise, collateral can be slashed.

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CryptoSlate says Google Cloud will operate a gateway for Puffer’s UniFi network, receiving transactions and guaranteeing their results before final settlement. Puffer CEO Amir Forouzani said both UniFi and the Puffer Preconf service were still in a testing environment as of September 23.

The design has not yet proved itself with customers putting real money through it. Puffer’s July 2025 technical outline also placed slashing in a later phase, and the latest answers did not establish when the stated penalty becomes enforceable.

A promise about the result, rather than only a place in a block.

Ethereum records transactions in blocks proposed in 12-second slots, while stronger finality generally takes minutes. Rollups can respond sooner, but an early confirmation is only useful if the application knows exactly what has been promised and who pays when something goes wrong.

Puffer’s design aims to promise the execution result, rather than merely saying a transaction will be included. For a swap, that could mean committing to the amount a user will receive.

That is more useful than a simple inclusion guarantee when prices are moving and the user wants to spend the proceeds immediately.

Forouzani told CryptoSlate that Puffer’s system was configured for 50-millisecond transaction times. That number is a system setting, not independently verified customer performance.

It does not make Ethereum finality itself happen in 50 milliseconds. The speed comes from accepting a financially backed promise while the base network continues its normal process.

Collateral is the enforcement mechanism.

Puffer says a failed preconfirmation would cost the gateway 1 ETH. That gives the operator a direct reason to deliver what it promised.

It also raises the questions that matter most before production use: who receives slashed funds, which losses qualify for compensation, how quickly payment arrives, and whether the collateral pool is large enough when several promises fail at once.

The ETH price itself can move, so a fixed 1 ETH penalty does not always cover the same dollar loss. Applications will need to compare the value at risk with the collateral available and decide when an early promise is good enough.

A small digital purchase may tolerate a different assurance level than a large transfer.

Google Cloud’s role gives the test a recognizable infrastructure operator, while Puffer says another gateway could take over if Google’s gateway went offline. That redundancy still has to be demonstrated under real load.

Puffer also said the first phase would launch without delegation from Ethereum base-layer validators, keeping the early assurance layer separate from Ethereum’s later settlement.

If the system works, users should barely notice it. They will see a balance become available sooner and move on.

The difficult work belongs behind the screen: defining the promise, pricing the risk, maintaining enough collateral, and making the user whole after a failed commitment.

Preconfirmations will earn trust only when the speed comes with clear responsibility.

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