CodeWithStu
@CodeWithStu
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Principal Engineer building @256Blocks. Previously CTO @ Illuvium, Principal @ Checkout dot com, Lead Architect @ ClearBank
London, England
Joined July 2016
Welcome to Day 19 of the #AdventOfEth where we explore the #ethereum ecosystem Today, we look at Chainlink and what it offers to Ethereum beyond just price feeds 👇 Chainlink provides a decentralised oracle infrastructure that allows smart contracts to access data and services
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Claude Code UI hack: Don't ask for everything at once. First prompt: layout and spacing only. Black on white, no styling Second prompt: add typography and borders Third prompt: layer in colour Constraints make it easier for the model to get each layer right
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18 million EC2 instances :o
we run 18 million EC2 instances per month. At our scale, we see very rare bugs very frequently. Last week, we received *half* an HTTP request. Not a HTTP 206, literally half a request. Content-Length was 2350 bytes. Body was actually 1200 bytes, and was truncated mid json doc.
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Welcome to Day 18 of the #AdventOfEth where we explore the ethereum ecosystem Today, we look at the OP Stack and what it brings to Ethereum’s rollup ecosystem 👇 The OP Stack is a modular, open-source framework for building Optimistic rollups. It provides the core components
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@henkjan If you're using claude code for more than a few lines of changes, the plan mode also massively boosts the quality of the output, especially when there are examples to follow in the codebase already
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Reminder: disable any MCP servers you’re not actively using. They eat into your context window, burn tokens faster, and can hurt output quality (because the LLM has to reason about irrelevant things)
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One of the biggest parts about building software is going back and looking at your costs. You can generally easily claw back some money whether it's log retention, backup periods or like this case, DB provider switching
POV you ditched MongoDB for TinyBird and your bill goes from $2.200/mo to $700/mo + your analytics are 10x faster
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Welcome to Day 17 of the #AdventOfEth where we explore the #ethereum ecosystem Today, we look at sequencers vs builders and how they influence transaction ordering across the ecosystem 👇 Builders are responsible for constructing blocks. They decide which transactions to
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Welcome to Day 16 of the #AdventOfEth where we explore the #ethereum ecosystem Today, we look at MEV (Maximal Extractable Value) and how transaction ordering impacts Ethereum in practice 👇 MEV refers to the value that can be extracted by controlling the order, inclusion, or
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Welcome to Day 15 of the #AdventOfEth where we explore the #ethereum ecosystem Today, we look at staking and how Ethereum is secured under Proof-of-Stake, and what that means in practice 👇 At a high level, staking is how validators participate in Ethereum’s consensus.
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Welcome to Day 14 of the #AdventOfEth where we explore the #ethereum ecosystem Today, we look at finality and why applications usually wait for multiple blocks before treating a transaction as settled 👇 On Ethereum L1, finality refers to the point at which a block is
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Welcome to Day 13 of the #AdventOfEth where we explore the #ethereum ecosystem Today, we look at Multicall smart contracts. This is a pattern that allows multiple contract calls to be bundled and executed within a single transaction 👇 At its core, multicall contracts let
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Welcome to Day 12 of the #AdventOfEth where we explore the #ethereum ecosystem Today, we look at ERC-2612, more commonly known as Permits. This standard allows ERC-20 approvals to be granted via signatures instead of on-chain transactions 👇 Traditionally, interacting with
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Here we go again
Researchers have found two new vulnerabilities in React Server Components while attempting to exploit the patches last week. These are new issues, separate from the critical CVE last week. The patch for React2Shell remains effective for the Remote Code Execution exploit.
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Welcome to Day 11 of the #AdventOfEth where we explore the #ethereum ecosystem Today, we look at ERC-6551, which is a standard that allows any ERC-721 NFT to have its own on-chain account. These are called Token Bound Accounts and effectively give NFTs a smart contract account
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Think i need to share more about the app im building, from a builders perspective. Like why im choosing a multi-region design, how im doing it, what libraries im using etc… just debating whether its on youtube or here or both
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Welcome to Day 10 of the #AdventOfEth where we explore the #ethereum ecosystem Today, we look at ERC-6909, a multi-token standard that aims to simplify how applications represent fungible and non-fungible assets in a single contract 👇 ERC-6909 provides a unified interface for
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This is great to see. Standards matter with things like this for the interoperability of everyone consuming
We're donating MCP to the @linuxfoundation and launching the Agentic AI Foundation with @OpenAI, @blocks, @AWS, @Bloomberg, @Cloudflare, @Google, and @Microsoft. MCP went from internal project to industry standard in a year. Now it gets the long-term stewardship it deserves.
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Welcome to Day 9 of the #AdventOfEth where we explore the #ethereum ecosystem Today, we look at two of the main approaches to scaling Ethereum: Optimistic rollups and zk-rollups. Both post transaction data to Ethereum L1, but they differ in how they prove correctness Optimistic
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