Web3 & Crypto

Ride Markets lets someone call a token on Solana and have funds back that call with real capital. Its page describes the arrangement as: call any token, funds back you, and you keep your share of the profit. The product is a markets and trading tool rather than a wallet or exchange. Its public page describes the mechanism in one line and does not publish a fee schedule or documentation at the time of collection.

Farcaster is a social network protocol with a deliberately unusual property: an account and its messages are not owned by a single application. A user registers an identity, and posts are stored in a way that any client can read, so several applications can serve the same social graph. Messages are signed by the user's key and stored on a peer-to-peer network, with the identity registered on-chain. Because the graph is public and portable, a client is a view rather than the network itself, and a user can move between clients without losing their followers. Frames, an embedded interactive post format, made the protocol useful for applications beyond reading a feed. The model has real friction. Registration costs money, the user experience of managing a wallet and keys is unfamiliar, and the network is much smaller than a mainstream platform. Its appeal is to people who want the social graph to be a public good rather than a company's asset.

Uniswap is a decentralised exchange protocol on Ethereum and other EVM chains. Instead of an order book, trades execute against liquidity pools that anyone can deposit into, with prices determined by a formula rather than by matching a buyer to a seller. The design is what made it influential. A token can be traded as soon as someone creates a pool for it, without a listing process, and the pool's liquidity providers earn a share of the trading fee. The interface is a website, but the exchange itself is a set of contracts, so anyone can build another interface or route trades through it. The tradeoffs are inherent to the model. A large trade moves the price against itself, which is why aggregators split orders across pools. Liquidity providers face loss relative to simply holding the assets when prices diverge, and the user experience requires a wallet, gas, and an understanding of what a failed transaction costs.

OpenSea is a marketplace for non-fungible tokens. A seller lists an item by signing an order, and the transfer settles on-chain when a buyer accepts, which means the marketplace itself never holds the asset. The product is organised around collections. A collection groups tokens that share a contract and a theme, and its page shows floor price, volume, and listed items. That structure is what makes a large set of individually distinct tokens navigable, and it is why the marketplace became the default place to look up a collection's activity. The tradeoffs are the marketplace's and the asset's. Listing is free because it is only a signature, but settlement costs gas, and a listing can be bypassed if the same asset is sold elsewhere. Fees and royalty enforcement have changed repeatedly, which matters to creators whose income depended on secondary sales.

Ethereum is a public blockchain whose distinguishing feature is that it executes general-purpose programs. A smart contract is code deployed to the network, and any account can call it, which turns the chain from a payments ledger into a platform other applications are built on. The network is maintained by validators who stake ether and are rewarded for proposing and attesting to blocks, with penalties for misbehaviour. Because every node verifies every transaction, the state of the chain is agreed without a central operator. Fees are paid in ether and scale with the computational work a transaction requires. The tradeoffs are the reason alternative chains exist. Throughput is limited by the requirement that every node process every transaction, so fees rise when demand is high. Contracts are immutable once deployed unless written to be upgradeable, which means a bug can be permanent. And the account model puts the burden of key management on the user, where a lost key means lost funds.