# EIP-1559 Updates Across the Blocknative Mempool Data Platform By [Gas Network - Blog](https://blog.gas.network) · 2021-08-05 ethereum, eip-1559, gas --- Ethereum's core [gas fee marketplace](/blog/eth-gas-101) mechanism is set to be upgraded at approximately 5:00am PST on August 5, 2021 – when [EIP-1559](/blog/eip-1559-fees) goes live as part of the [London Hard Fork](https://ethereum.org/en/history/#london) at block [12,965,000](https://etherscan.io/block/countdown/12965000). This will update how Ethereum transaction fees are calculated, moving from a [first-price auction](https://setupad.com/blog/first-price-vs-second-price-auction/) to a hybrid system involving base fees and tips. Given that this change impacts every Web3 [builder](/builders) and [trader](/traders), we have updated our core [Mempool API](/api), [Gas Platform](/gas-platform), [Gas Estimato](/gas-estimator#)r, and [Mempool Explorer](https://explorer.blocknative.com/) to each be EIP-1559-compliant and thereby help you and your users transact with confidence. Read on for full details.  EIP-1559 Updates to Mempool API ------------------------------- There are three updates to our Mempool API to support EIP-1559: * **Transaction** `type` * **Tip (**`maxPriorityFeePerGas`**)** * `maxFeePerGas` #### **Transaction Types** We now support the transaction `type` in our Mempool API. Prior to the London Hard Fork, all transactions are `type` "0" and use the traditional `gasPrice`.  But after the London Hard Fork,  the new transaction `type` "2" will use `maxPriorityFeePerGas` and `maxFeePerGas` to specify the transaction fee. Moving forward, both `type` 0 and `type` 2 transactions will be supported on Ethereum. Our API will continue to provide `gasPrice` for `type` 0 and will provide the new `maxPriorityFeePerGas` and `maxFeePerGas` fields for `type` 2 transactions. For Confirmed and Failed transactions we will also include the `baseFeePerGas` field. #### **Mempool API Changes** As soon as the London Hard Fork is live, our core [Mempool API](https://docs.blocknative.com/mempool-tools/webhook-api) will begin delivering notifications that include the following new fields: * `maxPriorityFeePerGas` * `maxFeePerGas` Mempool API will continue to include the `gasPrice` field where `type`\= 0. EIP-1559 Updates to Gas Platform -------------------------------- Once EIP-1559 is live on Ethereum Mainnet, the [Gas Platform API](https://docs.blocknative.com/gas-prediction/gas-platform) will automatically add gas prediction fields for the new Type 2 fields to help your transaction successfully be included in the next block(s). The new fields are:  * `baseFeePerGas`: determined by the previous baseFeePerGas and block size * `maxPriorityFeePerGas` **(tip):** computed based on Blocknative's estimation model * `maxFeePerGas`**:** calculated from an initial heuristic, but will transition to model of block size estimation as we get data Note that all existing Gas Platform API fields will continue to be supported. Hence, Gas Platform API payloads will expand to look like this:  Every ecosystem participant can go hands-on with Gas Platform and receive API updates once every 5 seconds, while [commercial Blocknative customers](/pricing) will receive API updates once every second. EIP-1559 Updates to Gas Estimator --------------------------------- Once the London Hard Fork is live, we will update our [Gas Estimator](/gas-estimator) with an EIP-1559 toggle in the upper right. When enabled, Gas Estimator will show the following: ![Screen Shot 2021-08-04 at 6.04.47 PM](https://storage.googleapis.com/papyrus_images/d10839bc684a8a743f86cca0a1b24f36de8b1b5bcb910dcaaf233aeb31d29e9c.png) If your wallet supports EIP-1559 (`type` 2) transactions, you will be able to use Gas Platform estimates to transact at your desired confidence interval. If your wallet does not support the new transaction type, you can turn off the EIP-1559 together to receive legacy gas estimates.  EIP-1559 Updates to Mempool Explorer ------------------------------------ Finally, we will be updating the [Filter](https://docs.blocknative.com/mempool-tools/mempool-explorer#filters) and [Select](https://docs.blocknative.com/mempool-tools/mempool-explorer#select) controls available inside [Mempool Explorer](https://explorer.blocknative.com) to add the EIP-1559-specific fields described above. This will enable all Mempool Explorer users to update their existing [Subscriptions](https://docs.blocknative.com/mempool-tools/mempool-explorer#subscriptions) to be aware of – and responsive to – data fields related to EIP-1559.  ![](https://storage.googleapis.com/papyrus_images/6cab374dcb117b6b1b29ae313b26853611c4a892dd0e19ecf09b78aeee8a730b.png)  Preparing for the London Hard Fork and EIP-1559 ----------------------------------------------- The Ethereum Foundation has indicated that gas prices may fluctuate – perhaps substantially – for a short period immediately after [EIP-1559](/blog/eip-1559-fees) goes live. Our data science team will be monitoring the Ethereum network as it reaches a new equilibrium so that we can refine our gas price models and provide the Web3 ecosystem with the most accurate and actionable gas estimations.  Please stay tuned for updates as we expand and refine our support for EIP-1559 across our portfolio. As always, please join our [Discord Community](https://discord.gg/KZaBVME) if you have questions, concerns, or recommendations. --- *Originally published on [Gas Network - Blog](https://blog.gas.network/eip-1559-updates-across-the-blocknative-mempool-data-platform)*