Five ways an x402 paid endpoint can serve content it wasn't paid for, and a CI check for each
x402 turns HTTP 402 into a real payment flow: your server answers 402 with payment requirements, the client pays, and a facilitator verifies and set…
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Solana Token Authorities Explained: Mint, Freeze, and Update Permissions
Solana tokens can have several authorities, each with different permissions. Mint Authority can authorize new token issuance. Freeze Authority can f…
100 Days of Solana - 2
Day 2: Creating a Wallet and Checking Its Balance Programmatically What I Learned I learned how to generate a Solana wallet programmatically and the…
100 Days of Solana - 1
Day 1: Generating a Solana Keypair & Funding with Devnet SOL What I Learned I learned that on Solana, my identity is represented by a keypair (p…
100 Days of Solana is a wrap!
Over the past 100 days, we’ve gone from the basics of wallets and transactions to deploying programs on Solana devnet. Some people completed every c…
Turning Solana Skills Into a Web3 Career
There is a gap between being able to do technical work and being hired to do it. The first is a question of skill, and if you have spent months writ…
My Solana Program Security Checklist
My Solana Program Security Checklist This is for anyone shipping an Anchor program to mainnet — especially if you're coming from a web2 background a…
What I Learned About Token Design on Solana as a Web2 Developer
A week ago my Solana tokens were just random strings of characters. No name, no rules, no personality. By the end of this week I had built tokens th…
The Solana Program Security Checklist I Wish I'd Had on Day One
I spent the last two weeks thinking like an attacker. I wrote tests whose only job was to make my own programs fail. I ran a fuzzer across thousands…
Solana: Can You Own Something You're Not Allowed to Sell?
Solana's Soulbound Credentials, explained for Web2 Devs. Ownership on a blockchain is supposed to be the whole pitch: whoever holds the private key…
Account Security on Solana, Made Simple
When you write a normal backend, you mostly trust your own database. A row you wrote is a row you can read back, and the data is what you put there.…
CPI on Solana: The Mental Model I Wish I Had on Day 71
I stared at CpiContext::new(...) for a solid ten minutes on Day 71. I knew the arguments existed. I had no idea what they meant. I copied working co…
Solana Transactions Explained for Backend Developers
If you're coming from a Web2 backend background, your mental model of APIs is probably built on the standard HTTP client-server pattern: client make…
What I Learned About PDAs in a Week of Building on Solana
What problem do PDAs solve? One of the first things that confused me when learning Solana was where programs actually store data. Unlike a tradition…
Three Token-2022 Mints in One Week: Fees, Yield, and Soul-Bound Tokens
During the last few days of the 100 Days Of Solana challenge, I explored one of the most interesting features of Solana's Token-2022 Program: extens…
What Token Extensions Are and Why a Web2 Developer Should Care
You already understand tokens. Extensions are just middleware for your money. If you have ever worked with Stripe, you know the pattern. You start w…
Understanding Program Derived Addresses: The Solana Address That Has No Private Key
Every Solana program eventually hits the same question: where do I put my data, and how do I find it again later? Programs are stateless, so a progr…
Arc 7 Catch-Up: Building NFTs from First Principles
Arc 7 of 100 Days of Solana was about building NFTs from first principles. Instead of starting with marketplaces, profile pictures, or NFT culture,…
Three Token-2022 Mints in One Week: Fees, Yield, and Soulbound
If you come from Web2, you probably think of a token as a number in a database that moves around when people transact. On Solana, the original SPL T…
The Rust You Actually Need to Write Your First Anchor Program
If you have made it this far in 100 Days of Solana, you have been working in JavaScript and on the command line. You have been calling RPC methods,…
Three Token-2022 Mints in One Week: Fees, Yield, and Soul-Bound
If you have built middleware in Web2, you already understand Token-2022 extensions. The old SPL token program is like a plain Express router. Token-…
Solana Transactions Aren't API Calls .. So what are they?
As a backend developer, I came into Solana thinking transactions were basically API requests. You send some data, the network processes it, and you…
Solana NFTs Without Metaplex: What I Learned Building with Token Extensions published: true
Before this week I thought you needed Metaplex to build a real Solana NFT. It turns out you can mint a full NFT, stamp metadata directly onto it, gr…
What I Learned Building NFTs on Solana with Token Extensions
Before this week, NFTs on Solana weren't new to me. I've previously worked with Programmable NFTs ( pNFTs ) and even built projects that integrate t…
Solana Accounts for Web2 Developers (You Already Understand Files)
I spent the past month building on Solana. Sent transfers. Decoded raw bytes. Inspected accounts until my terminal turned into a wall of hex. Along…
Soulbound Credentials on Solana: Building Revocable Tokens with Non-Transferable + Permanent Delegate
I spent 7 days learning Solana token extensions. Here's what clicked, what surprised me, and the code you need to build tokens that can't be traded…
Anatomy of a Solana Transaction: Following Every Step from Creation to Finalization
Over the past few days, I've been learning Solana transactions by doing what every developer eventually does: building things, breaking them, and tr…
Identity in Web3
Unlike in case of Web2 ,Web3 enables self-soverign identity (SSI) model which allows users to control their digital identity. Users in web3 can deci…
Fungible and Non-Fungible Tokens on Solana: Same System, Different Rules
If you have been following the 100 Days of Solana challenges, you have already worked with tokens. You created mints, set up token accounts, transfe…
Solana Transactions Are Not What I Expected (Coming From EVM)
I've been building on EVM chains for a while Base, Ethereum, the usual. I thought picking up Solana would be a lateral move. Same concept, different…