in-line Transaction events made easy

Deliver real-time notifications to your users.

With built-in support for Speed-Ups and Cancels, Blocknative Notify.js is trusted by over 200 crypto-applications to help users transact with confidence. Notify.js is easy to integrate and quick to customize.

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"Blocknative makes it easy for Synthetix to keep our users up-to-date about their transaction progress — especially replacement transactions. Both the Notify.js and Onboard.js front-end libraries are easy to work with and have scaled to support our user base.”

Clément Balestrat

Technical Lead, Synthetix

"Every decentralized application I build needs to notify the user about transactions. Blocknative's Notify.js gives me this functionality out of the box and it even works on xDAI. I recommend it to developers because it will save them a lot of time and that's why it is included in my developer template scaffold-eth by default."

Austin Griffith

A customizable notification framework.

Notify.js is the easiest way for developers to integrate real-time transaction notifications into their application. Blocknative makes it quick to get started and easy to customize to your needs.

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Style to match your brand.

Modify the CSS to match your brand's fonts, color palette, and more.

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Create custom notifications.

Customize the built-in notifications with links and images and even add your own notifications.

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Localize to your language.

With i18n built-in, add languages to match your application and users.

Unrivaled transaction transparency.

Provide your end-users with 1-click access to their transaction on Etherescan, Alethio, or your explorer of choice.

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Seamless desktop & mobile support.

Notify.js works on every device, so you can keep your users up-to-date, whether they're using a desktop or phone.

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Alert users for every state change.

Blocknative monitors the entire transaction lifecycle from the moment it enters the mempool until it is finalized – or replaced.

Pending

A new transaction was detected in the "pending" area of the mempool and is eligible for inclusion in a block.

Confirmed

The transaction was successfully mined with no errors.

Failed

The transaction was mined, but failed to execute due to an EVM error.

Speed Up

A replacement transaction was detected with the same to, value and input parameters as the transaction being replaced.

Cancel

A replacement transaction was detected in the mempool with different to, value or input parameters compared to the transaction being replaced.

Stuck

A transaction was detected in the Queued area of the mempool and is not eligible for inclusion in a block.

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