ajlopez / BlockchainJ

Blockchain project in Java, WIP

BlockChainJ

Simple blockchain implementation, in Java, WIP

Description

This blockchain implementation has:

• Block: with number, parent block and list of transactions
• Transaction: send value from sender to receiver account
• Account: with balance and optional smart contract code
• Virtual Machine: to execute smart contracts

The world state keeps the account states. Each account has a balance and smart contract storage.

Posts

• Building a Blockchain: Introduction
• Building a Blockchain: Main Entities
• Building a Blockchain: Serialization
• Building a Blockchain: Key Value Stores
• Building a Blockchain: Subroutines in the Virtual Machine
• Building a Blockchain: Towards Beam Synchronization
• Building a Blockchain: Executing Smart Contracts
• Decoupling Storage from Execution in RSK Blockchain
• One Code Many Storages

References

• SpongyCastle
• BouncyCastle Java
• RLP
• RLP Tests
• How to Build Your Own Blockchain Part 3 — Writing Nodes that Mine and Talk
• Create a simple HTTP Web Server in Java
• Function Pointers in Java
• A Simple Java TCP Server and TCP Client
• BlockBench: A Framework for Analyzing Private Blockchains
• Pantheon: An enterprise-grade Java-based, Apache 2.0 licensed Ethereum client
• Add timer metrics for EVM operations #551
• Do a Simple HTTP Request in Java
• Model 0: low-level defence measures for Sybil attacks in P2P networks
• Introducing Hobbits: A lightweight wire protocol for ETH 2.0
• Ethereum 2.0’s Nodes Need to Talk – A Solution Is ‘Hobbits’
• Wisps: The Magical World of Create2
• Quantifying Immutability
• Empirically Analyzing Ethereum’s Gas Mechanism
• Blockchain Scalability: Do Layer I Solutions Hold the Key?
• Overview of Layer 2 approaches: Plasma, State Channels, Side Chains, Roll Ups
• Blockchain Consensus: The Past, Present, and Future
• Warp Sync
• What is a light client and why you should care?
• Transactions Per Second in Permissioned Blockchains — Does It Even Matter?
• Vac modular peer-to-peer messaging stack
• Pantheon Enterprise Ethereum Client
• What Comprises an Ethereum Fullnode Implementation?
• Announcing Hyperledger Besu
• Fast Ethereum Virtual Machine implementation
• Synchrony, Asynchrony and Partial synchrony
• How to implement a most-recently-used cache
• EIP 2124, Fork identifier for chain compatibility checks
• Special-purpose light clients for old receipts and transactions
• A Primer on Ethereum Blockchain Light Clients
• Byzantine Failure — Why Blockchain Development is Difficult
• How does Ethereum work, anyway?
• Understanding Ethereum’s P2P Network
• Guidelines for low-level cryptography software
• Breaking down the differences between PoW and PoS
• Mastering The Fundamentals of Ethereum (For New Blockchain Devs) Part III — Wallets, Keys, And Accounts
• Byzantine Fault Tolerance in a nutshell
• The 1.x Files: The State of Stateless Ethereum
• Stateless Ethereum: Binary Tries Experiment
• Protocol changes to bound witness size
• Developing the EigenTrust Algorithm and Determining Authenticity Online
• The EigenTrust Algorithm for Reputation Management in P2P Networks
• State Provider Models in Ethereum 2.0
• With fraud-proof-free data availability proofs, we can have scalable data chains without committees
• Requirements for Ethereum Private Sidechains
• Ren Project
• Interledger: How to Interconnect All Blockchains and Value Networks
• Transaction Announcements and Retrievals
• A-to-Z of Blockchain Consensus
• Filecoin Specification
• Archive Node
• Understanding Merkle pollards
• Kadcast: A Structured Approach to Broadcast in Blockchain Networks
• Semi-Stateless Initial Sync Experiment
• Ethereum does it too! A deep dive into DHT
• DHT: Attacks and Defenses
• Private Ethereum by Example
• What is Ethereum’s Uncle Rate and Why Does It Matter?
• Ethereum Miner Test — Results
• Uncle Mining, an Ethereum Consensus Protocol Flaw
• Does anyone understand the behavior of abi.encodePacked()?
• “Merry Go Round” sync
• Understanding Merkle pollards
• EIP 2464: eth/65: transaction announcements and retrievals
• Survey of proposals to reduce block witness size
• Understanding sparse Merkle multiproofs
• Understanding Merkle pollards
• Modified Merkle Patricia Trie — How Ethereum saves a state
• Implementing Merkle Tree and Patricia Trie
• Berty (P2P) is opening its code!
• Kadcast: A Structured Approach to Broadcast in Blockchain Networks
• Why are transaction tries in Ethereum not plain Merkle Tries?
• Replicate Ethereum’s mainnet in a development environment with Ganache’s forking feature
• Awesome Chaos Engineering
• Intro to Beam Sync
• An Ethereum Storage Decode tool
• EVM Bytecode Merklization
• Data from the Ethereum stateless prototype
• State Rent Rough Proposal
• Ethereum Series — Understanding Nonce
• What are the -Xms and -Xmx parameters when starting JVM?
• Java Xmx and Various Memory Management Options in Java
• Account Abstraction, Stateless Mining Eth1.x/Eth 2 Implementation, Rationale Document
• Testground: A platform for testing, benchmarking, and simulating distributed and p2p systems at scale
• UTXO vs Account/Balance Model
• History of Ethereum Hard Forks
• What is a light client and why you should care?
• The 1.x Files: A Primer for the Witness Specification
• The hard DiSC of the world computer
• Contra-*: Mechanisms for Countering Spam Attacks on Blockchain’s Memory Pools
• What’s Ahead for the OpenEthereum Client
• Geth Pink Marble (v1.9.14)
• Free the Birds: the Case for Tokenized Gas
• Mjolnir: Tooling for BAT Apollo
• Getting Synced - Wiki Parity Tech Documentation
• Notes on syncing Ethereum nodes
• Why do we need both nonce and mixhash values in a block?
• Snap Synchronization
• Does installing geth download the entire blockchain?
• Ethereum Snapshot Protocol (SNAP)
• Gas and circuit constraint benchmarks of binary and quinary incremental Merkle trees using the Poseidon hash function
• Optimizing sparse Merkle trees
• Ethereum 2 Specs: Merkle proofs
• Some quick numbers on code merkelization
• Open problem: improving stealth addresses Cryptography
• Towards the first release of Turbo-geth
• Analysis of EIP-1559
• Analysis of EIP-2593 (Escalator)
• Binary Trie Format
• A World Without (block) Limits!
• ReGenesis Explained
• Encrypted Blockchain Databases
• Simpler Ethereum sync: Major/minor state snapshots, blockchain files, receipt files
• TurboGeth Staged Sync
• EIP-1052: EXTCODEHASH opcode
• What is the EXTCODEHASH?
• Ethereum Virtual Machine Opcodes
• Ethereum Classic Simplicity
• evmone is a C++ implementation of the Ethereum Virtual Machine (EVM)
• EVM384 – Can we do Fast Crypto in EVM?
• EIP-1087: Net gas metering for SSTORE operations
• EIP-1283: Net gas metering for SSTORE without dirty maps
• Gas cost increases for state access opcodes
• Parsing JSON is a Minefield
• Simple Subroutines for the EVM
• Ethereum Cat Herders Update #23
• Ethereum Wiki
• Understanding Ethereum by studying the source code
• Everything You Ever Wanted to Know About Events and Logs on Ethereum
• Demystifying libp2p Gossipsub: A Scalable and Extensible p2p Gossip Protocol by Raúl Kripalani
• Broken Metre: Attacking Resource Metering in EVM
• EIP-2929: Gas cost increases for state access opcodes
• Ethereum scalability issues exposed as high gas fees stall DeFi boom
• Introduction to Nethermind Discovery Protocol
• Gas cost for calling precompiles
• EIP-2972: Wrapped Legacy Transactions
• Finite field arithmetic
• State of block header sync in light clients
• EIP-3014: Create eth_symbol method for JSON-RPC
• Structure of a binary state tree — part 1
• What is a light client and why you should care?
• Establishing peer-to-peer connections with Jami
• Authenticated Dictionaries with Cross-Incremental Proof (Dis)aggregation
• Reducing Round Complexity of Byzantine Broadcast
• The Ethereum Virtual Machine
• Geth snap sync results (only state) against 3 serving nodes
• EIP-3091: Block Explorer API Routes
• Optimal chunking size for code merklization
• A Tale of Two Pricing Schemes
• Why Proof of Stake (Nov 2020)
• [Towards formal semantics of the beacon chain’s pyspec]
• Talk: Vac, Waku v2 and Ethereum Messaging
• Oskar Thoren | Vac, Waku v2 and Ethereum Messaging
• EVM Istanbul storage pricing
• A more gas-efficient upgradeable proxy by not using storage
• Delegatecall return values solidity 5.0
• Instant Cross-L2 Transfers are Now on Testnet!
• Blockchain reward sharing - a comparative systematization from first principles
• Working with Strings in Solidity
• Creating a blockchain with less than 100 code lines
• Transaction Fee Mechanism Design for the Ethereum Blockchain: An Economic Analysis of EIP-1559
• The Burden of Proof(s): Code Merkleization
• List of EVM features potentially worth removing
• Ethereum JSON RPC Hex Encoding
• Why it's so important to go stateless
• Verkle trie for Eth1 state
• Ethereum State Scale Management Proposals (Part 1)
• Can we do Fast Crypto in EVM?
• EIP Draft: Replace alt_bn128 Precompiles With EVM Bytecode
• EIP Draft: EVM384 and Friends
• Can a contract fetch the global block gas limit?
• EIP-1884: Repricing for trie-size-dependent opcodes
• Dodging a bullet: Ethereum State Problems
• EIP-3584: Block Access List

To Do

• Signed transactions
• Numeric values in hexadecimal in JSON serialization
• Transaction receipts
• Log emit
• Update transaction pool with new block information
• Review incoming message processing (queue(s)?)
• Create/Call opcodes in virtual machine (WIP)

License

MIT