# 幣圈小本本 * 虛擬貨幣錢包概念 * Web 3.0 ---  --- ## 虛擬貨幣錢包 本身並不存放「幣」，存放的是「私鑰」，透過私鑰能轉換成錢包地址，只有私鑰能簽出發送的交易 - full node(bitcoind geth parity) - 網頁錢包(metamask)、app錢包(Imtoken) - 多幣別錢包(Jaxx Coinomi) - 硬體錢包、冷錢包(Ledger) ---  ---  --- ## Bitcoin Improvement Proposals * BIP-32 - 規範出如何建立一個分層確定性錢包，由用一份seed產生多組私鑰 * BIP-39 - 制定由哪些字組來產生成512 bit seed * BIP-44 - 基於BIP-32上的擴充，提供了5層path，其中包括了多幣種 * m/purpose’/coin_type’/account’/change/index * m/44’/0’/0’/0/0 : bitcoin * m/44’/1’/0’/0/0 : bitcoin testnet * m/44’/60’/0’/0/0 : ethereum --- [Mnemonic Code Converter](https://iancoleman.io/bip39/) --- ### Blockchain * Blockchain 1.0 - Bitcoin * Blockchain 2.0 - Ethereum / Solana / Cardano (smart contract) --- ### 交易模型 * UTXO (Unspent transaction output) - Bitcoin, Litcoin, Dogecoin, Cardano * Account-Based Chains - Ethereum, Solana... ---  ---  --- ### DAO (Decentralized Autonomous Organization) 分布式自治組織 --- ### DAPP (Decentralized Applications) 建立在去中心化網路，前端介面可以跟智能合約互動的應用程式，與傳統的應用程式在使用上不會有太大的差別，唯一的差別就是背後的資料不是存放在中心化 合約想怎麼寫就這麼寫，佈置上區塊鏈後就可以永久存在 開源 / 開放 / 不受監管 / 不需信任 --- ### Web 3.0 --- You own and control your assets, data, indentity and apps. ---  ---  ---  ---  --- ### So where are we? Most apps you use are still web2. The majority of dapps out there are purely for finance, like trading crypto or buying and selling NFTs. But we're getting there, and web3 is already beginning to expand into huge industries, like music, video streaming, and even gaming. ---