Thanks to new technology in the Ethereum infrastructure platform, Ethereum transactions can now be pre-confirmed in a matter of seconds.
According to Primev, its FAST RPC (remote procedure call) allows transactions to be pre-confirmed and included in a block within 200 milliseconds, enabling everything from transferring Ether (ETH) and interacting with smart contracts to minting non-fungible tokens (NFTs) at “blazing speed.”
A preconfirmation is an initial signal from the block builder that a transaction is likely to be included in the next block, whereas a block include refers to a transaction that is added to a block.
RPCs, like FAST RPC, connect crypto wallets to blockchain nodes and allow users to send transactions and interact with on-chain decentralized applications.
From a user perspective, 200ms could theoretically be comparable to fast layer 1 blockchains like Sui, where transactions are typically confirmed within 200ms.
Primev founder Murat Akdeniz posted a live demonstration on X on Monday showing a near-instant ETH transfer through Ethereum's self-custody wallet MetaMask, which he said was pre-confirmed in 377 milliseconds and included in the same block.
Akdeniz said his team has been working for more than two years to “supercharge” Ethereum to these speeds.
Ethereum L1 is painfully slow 😩
Could the developers please fix this?
For over two years, the @primev team has been working hard to power Ethereum's mainnet.
Today: Millisecond pre-checks…on L1! 🚀Watch us send ETH super fast in this 18 second video pic.twitter.com/Diao4VfHzT
— Murat | lordofcoins.eth (@MuratLite) October 20, 2025
FAST RPC has not been extensively tested
The most widely used RPC on Ethereum are the Infura and Alchemy solutions. They are slower than Primev's FAST RPC, but have a much larger node distribution and have been field tested under heavier network loads.
Over 400,000 builders leverage Infura, built by Consensys, to connect to Ethereum, and Alchemy powers over $150 billion in transactions annually from over 100 users around the world.
Still, Primev's solution has the potential to offer much faster transactions for users who want to stay on Ethereum's mainnet rather than switching to Ethereum's Layer 2 solution.
FastRPC is relatively easy to set up
Primev's solution can be easily integrated by connecting to crypto wallets such as MetaMask and WalletConnect and replacing Infura and Alchemy RPC with FAST RPC.
Users must deposit funds into Primev’s “gas tank” at wallet address “0x24A…c2ACf” before they can freely interact on-chain.
