Technical

Over 730,000 ERC-4337 smart accounts have been deployed on Ethereum, Arbitrum, Optimism and Polygon. 53% of those accounts were created in the past month, marking the beginning of a major transition from EOA wallets to smart accounts in the Ethereum ecosystem. 

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

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 to find airdrop hunters performing a sybil attack ahead of Hop Exchange's airdrop with Alchemy's Issac Lau and the Trace API during the Hop Exchange's Airdrop Hunter Bounty initiative.

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

Step by step guide on interacting with a deployed Ethereum smart contract by updating a smart contract variable.

When you send a transaction to the Ethereum blockchain, where does it go? What is a pending transaction and what happens before it gets mined? What is a mempool? Why do some of my transactions succeed and others fail?We’ll take a deep dive into the flow of a transaction on the Ethereum network, from the moment you hit “send” to the point when the transaction becomes fully mined. We’ll discuss what might go wrong and how Alchemy’s suite of developer tools might help you debug and gain visibility into this process.

Have you ever experienced slow transactions or outages when working with the MetaMask wallet? Are you worried about poor gas fee estimations or inconsistent block data? Do you want a reliable way to connect to Polygon / Matic and other L2 chains? If so, this post is for you.

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.