4. 什麼是區塊鏈
? Blockchain = Chain of Data Block
Distributed Ledger
Secure
Transactions are
verified by the
entire network
Decentralized
(no owner)
Immutable
Peer-to-Peer
Network
Nodes should
ledger of facts +
history of updates
35. 以太坊Ethereum
?This is how Ethereum’s website defines itself:
?“Ethereum is a decentralized platform that runs smart
contracts: applications that run exactly as programmed
without any possibility of downtime, censorship, fraud or
third party interference. These apps run on a custom built
blockchain, an enormously powerful shared global
infrastructure that can move value around and represent
the ownership of property.”
37. Ethereum ID
Network Network ID Note
Main 1
Morden 2 Deprecated
Ropsten 3 POW
Rinkeby 4 POA, supported by geth only
Kovan 42 POA, supported by Parity only
47. MetaMask
? A Ether Wallet
? Chrome、Firefox and Opera Plugin
? Similar to MIST-Browser
? No geth node
? Is a bridge
? Like a “light-client”
? A “Key store” for your private keys
63. Account – Network
? Main Ethereum Network
? Ropsten Test Network
? Kovan Test Network
? Rinkeby Test Network
? G?rli Test Network
? Localhost 8545
? Custom RPC