/blockchain

Primary LanguageTypeScript

Blockchain

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Blockchain is an immutable, distributed public ledger and peer-to-peer (P2P network).

  • Block = all transactions within a certain time period
  • Blockchain = links all blocks together

Features of Blockchain

  • SHA256 Hash Function: a one-way cryptographic function to generate a fixed size for any size of source text. The encrypted value cannot be decrypted back to the original text.
  • Public Key Cryptography: creating a set of keys referred as Public key and Private key.
  • Distributed Leger: a digital system in which transaction and their details are recorded in multiple places at the same time.
  • Peer to Peer Network: one in which two or more PCs shares files and access to devices such as printers without require a separate server computer.
  • Consensus Algorithm: a process in computer science used to achieve agreement on a single data value among distributed systems. Proof-of-Work is the original consensus algorithm in a Blockchain network.
  • Incentives for Validation: giving a reward for validating the transactions and maintaining the Blockchain

[Blockchain Type](#Using Blockchain for Trustworthy Mobile Contact Tracing)

The two common types are the Public Blockchain and the Private Blockchain.

  • A public blockchain allows any node that has internet connection to access the blockchain by issuing either a write a read request. Some of the popular public blockchain available today are Bitcoins, Ethereum, Factom, Blockstream, and so on.
  • A private blockchain allows nodes to issue similar requests but these nodes must be predefined and authorized.

Getting Started(Docker)

Build images

docker-compose up --build
#or
docker-compose build dashboard
docker-compose up dev

Find out the IP address of running Docker engine:

docker-machine ip default

References