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Blockchain is an immutable linked list of hashes that uses some consensus system like proof of stake (or other methods) to decide which blocks (transactions or runnable code) are added next.

Solana, Tezos, Monero, Mimblewimble & Avalanche are interesting blockchains. In future they can let you run web apps that run like protocols -- no company in the middle, just peer to peer networks. In practice now, they are mostly empty promises and lots of fraud.

You should not use a blockchain unless you critically need finality in a shared context with a lot of other financial applications like exchanges, stable coin providers. If you don't need that, don't use a blockchain.

Dark Forest is a unique game built on top of blockchain.

Thirdweb seems like a nice dev framework.

Want to study Dexterity code for how to build a decentralized exchange.

Consensus algorithms

  • PoW: The more hashing power the more trust worthy.
  • PoS: The more coins the more trust worthy.
  • PBFT: Hand selected trusted nodes.
  • Randomized asynchronous algorithm: You trust nobody! Every single node is constantly re-evaluated. (Skycoin)

Interesting applications

  • Tezos
  • Polkadot
  • Horizon State - Digital voting.
  • Blockstack - Decentralized apps on Blockstack let you own your data so you can maintain your privacy, security and freedom.
  • Cardano - Cryptographic currency implementing Ouroboros PoS protocol.
  • Iden3 - Decentralized identity management solution.
  • Gnosis - Builds new market mechanisms for decentralized finance. (GitHub) (Gnosis Protocol V2)
  • Digital Asset - Automate and synchronize business processes.
  • Purple Protocol - Global Decentralized Ledger Infrastructure.
  • Slingshot - New blockchain architecture under active development, with a strong focus on scalability, privacy and safety.
  • arweave - New type of storage that backs data with sustainable and perpetual endowments, allowing users and developers to store data forever.
  • Foundation - Reclaiming the idea of the stock market to benefit creators and collectors directly.
  • Zilliqa
  • Zilliqa - Scalable smart contract platform that aims to tackle the congestion issue plaguing the blockchain industry.
  • Metapurse - Crypto-exclusive fund.
  • Rarible - Create, sell or collect digital items secured with Blockchain.
  • OpenSea - Largest NFT marketplace. Buy, sell, and discover rare digital items. (JS SDK) (Dev Docs)
  • Polymarket - Global Information Markets Platform.
  • Tokenlog - Token-weighted backlogs. (Code)
  • RabbitHole - Earn crypto by using the latest crypto applications.
  • WENEW - Collect iconic moments in music, sports, comedy, history, etc. on the blockchain. (Tweet)
  • Sky Mavis - Blockchain: Gamified.
  • Axie Infinity - New type of game, partially owned and operated by its players. (White Paper)
  • - Fractional ownership of NFTs.
  • Spectre - Spectralized art for all. (GitHub)
  • Blitmap - Community crafted sci-fantasy universe.
  • Loot - Randomized adventurer gear generated and stored on chain. Stats, images, and other functionality are intentionally omitted for others to interpret. (Web Code)
  • 1inch Network - Distributed network for decentralized protocols. (Twitter)
  • Githereum - Proof of existence blockchain based on a novel LGTM consensus algorithm.

Interesting NFTs