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                                      Minimal implementation of blockchain
                                                         Written in CSharp
                                                         pjc0247@naver.com

A fork of minichain which implements more advanced features such as VM and SmartContract stuffs.
(minichain project pursues the minimal codes, That's why I made another project.)

Documentation

You can learn

• P2P communication between nodes
• How to create(mine) a new block and distribute to chain
• Consensus based on Proof of work
• Store/Retrive data(state) into blockchain
• Signing transaction (Using asymmetric key validation)
• Execute a program on blockchain network via minidity

You can also learn (See example projects)

• Create a hardfork update to ongoing blockchain.
• Bad node attack

Sub repositories

• Demonstrate 51% attack on blockchain network
• State DB implementation
• coldog - offline wallet solution for mchain

Specification

• Consensus

  • Proof of Work

• Block Structure

• Block Validation

  • txs must be a non empty array (except genesis-block)
  • txs[0] must be a reward transaction.
  • Check the block has valid minerAddress
  • Check the block proper difficulty
  • Check the nonce with block difficulty