Technical

On October 27th 2023, Alchemy discovered a ERC1271 contract signature replay vulnerability that affected a large number of smart contract accounts (SCA), and led to risks when interacting with several applications.

RIP-7212 is a core change in the Ethereum protocol that opens up a way to have cheap, secure, and fast P256 curve verification with a precompiled contract.

Base's Goerli testnet is scheduled to be spun down on February 9th. We will keep our nodes running for an extra week after this date.

ERC-4337 smart account adoption saw major growth in the fourth quarter of 2024, surpassing 1 million total deployed accounts!

Analyze the evolution of ERC-4337 user behavior on Ethereum, Arbitrum, Optimism and Polygon.

Learn how to get preVerificationGas and verificationGasLimit fields during the user operation gas estimation process using a dummy signature and dummy paymasterAndData value.

Learn how Alchemy's ERC-4337 Bundler handles gas estimation for gas fees that are not metered by the entry point contract including signature aggregators and layer 2 transactions including Optimism and Arbitrum.

Learn how bundlers are incentivized, how bundlers estimate user operation gas fees, and how senders estimate user op fees on Arbitrum and Optimism.

Learn how Alchemy engineers developed an ERC-4337 bundler in Rust that provides accurate user operation gas estimations, and explore suggested changes to the entry point contract to make the gas estimation process easier.

On March 7th, 2023, Alchemy and members of the open source community, identified calldata decoding issues with the ERC-4337 EntryPoint contract and the example VerifyingPaymaster contract.

Learn how to create and deploy smart contract wallets and counterfactual addresses with CREATE2, and about factories, which specialize in creating different kinds of wallet contracts.

Learn how to create a smart contract wallet to protect your most valuable assets and how they rely on a bundler to call smart contract wallets on your behalf.

Learn how paymasters, paymaster staking, and paymaster postOp methods enable the sponsoring of transactions according to Account Abstraction as detailed in ERC-4337.

Explore ERC-4337's breakthrough with aggregate signatures. Streamline multiple user op validations using a single cryptographic signature, enhancing transaction efficiency.

In this article, we'll cover smart contract security best practices, fail-safe protections, and smart contract analysis tools for hardening smart contract security.

Learn how to polyfill node core modules in webpack version 5 and above using the react-app-rewired package, installing the required dependencies, and overriding the default webpack configuration.

Learn about Web3, understand its building blocks, and get building on the Web3 technology stack

Learn how to get historical transactions on the Polygon chain using the Alchemy transfers API.

Overcome slow transactions, outages, and poor gas fee estimations with MetaMask. Connect reliably to Polygon/Matic and other L2 chains using Alchemy's RPC.

What is a blockchain node? Why is running your own Ethereum node difficult? What is a node provider and why do I need one? What are the differences between providers? We'll answer all of these questions in this article.

Step-by-step guide to creating and deploying your own NFT on the Ethereum blockchain using Metamask, Solidity, Hardhat, Pinata, and Alchemy.

Alchemy Notify's suite now includes notifications for internal (smart contract) transactions.

One of the two primary providers of Ethereum node software has deprecated support for their client. This 8-step guide shares best practices for migrating your nodes to Geth.