Bitcoin-Blu

⚠️ Bitcoin-Blu is NOT Bitcoin!

Altcoin

based on Bitcoin Sourcecode v28.2

Slogan: "Did you miss the early days of Bitcoin?
Don't miss the early days of Bitcoin-Blu!"

Bitcoin-Blu is an altcoin based on the same source-code (v28.2) as Bitcoin.

The main goal of Bitcoin-Blu is the same as the goal of the original Bitcoin.
“Bitcoin-Blu (BBLU) enables individuals to transact securely and freely, without relying on banks or trusted intermediaries, through a decentralized, peer-to-peer digital cash system.”

While Bitcoin (BTC) has become expensive to use, with very high mining difficulty and relatively low rewards for finding new blocks, Bitcoin-Blu (BBLU) offers a more accessible alternative. Its design could allow lower transaction costs, fairer mining opportunities, and greater participation across a wider community. Bitcoin-Blu could innovate, compete, and provide alternatives without altering BTC, but it would need time, adoption, and trust to become meaningful. It could also increase the overall robustness of decentralized money: if one chain suffers a major attack, users could switch to the other — a form of systemic redundancy.

🚧 The Bitcoin-Blu network needs help with development!
Are you a developer, contributor or early adopter?
Please fork the source-code and contribute to the project!
Feel free to send your pull requests to the Bitcoin-Blu development team!

🐛 Open Issues

currently only main network is started, we must configure test, reg, and signet
we should update the translations
the testcases are mostly broken, we need to fix them
there are a lot of places in the UI where we have to replace the label "bitcoin" with "bitcoin-blu"
we should implement a DNS Seed Server
we should implement a hardware-wallet for the BBLU coin

🚀 Getting Started with Bitcoin-Blu

1. Download and Install Bitcoin-Blu Full Node

Option A: Build from Source

Download source from GitHub https://github.com/bitcoin-blu/bitcoin-blu
Compile source
Run executable file

Option B: Docker

You do not need to expose the ports, unless you allow incomming connections (8343) and/or want to run bitcoin-cli (rpc: 8342) outside docker.

docker run -d --name blu-node \
  -v $HOME/blu-data:/bitcoin \
  -p 8342:8342 -p 8343:8343 \
  bitblu/bitcoin-blu \
  -printtoconsole \
  -rpcallowip=0.0.0.0/0 \
  -rpcpassword=yourpassword \
  -rpcuser=youruser \
  -server=1 \
  -datadir=/bitcoin

Verify the node is running:

docker exec -it blu-node /bitcoin-cli -rpcuser=youruser -rpcpassword=yourpassword getblockchaininfo

Option C: Executable

Download the latest release from GitHub Releases
wget https://github.com/bitcoin-blu/bitcoin-blu/releases/download/v1.0.0/bitcoinblu_1.0.0_amd64.deb
Install with: sudo dpkg -i bitcoinblu_1.0.0_amd64.deb
Run bitcoinblu-qt (GUI) or bitcoinblu-d (daemon)

2. Generate a Bitcoin-Blu Wallet Address

Either use the CLI or UI client to create the wallet
Generate e.g. a legacy address (Bitcoin-Blu addresses have their own prefixes!)
Backup your wallet!

3. Mine Bitcoin-Blu Coins (BBLU)

Install your own mining pool software or use the experimental one (no backup, no garanteed payout) at: 157.245.20.33
Supported mining setups:
- Stratum protocol: stratum+tcp://157.245.20.33:7002
- tested with Canaan, Avalon Nano3 miner
- tested with Nerdminer
- pool does currently not work with BitAxe (difficulty negotiation problem)
Start mining Bitcoin-Blu!
Have fun! 🎉

🔧 Bitcoin-Blu Internals

What is not changed in contrast to Bitcoin

Coinbase Maturity: 100 blocks before coinbase is spendable
Block Reward: Initial block subsidy of 50 * COIN
Halving Interval: 210,000 blocks per subsidy halving
Max Money 21 million BBLU cap
PoW Target Timespan: 1,209,600 seconds (2 weeks)
PoW Target Spacing: 600 seconds (10 minutes per block)
Max Halvings: Reward stops after 64 halvings

Key Differences from Bitcoin (see datails on github)

Changed the name of the runnables to from bitcoind to bitcoinblu-d and from bitcoin-cli to bitcoinblu-cli
Changed chain name to Bitcoin-Blu: main-blu
Changed default ports for all networks (mainnet: 8343)
Changed default RPC port for all networks (mainnet: 8342)
Created and restarted a new blockchain (2025-07-25 07:06:21)
Changed prefixes of addresses, keys, and messages

Legacy (P2PKH) addresses start with 'B' (e.g. BFT1v37hk8mMarJvX5Uy4mJZkDJsS2kmWC)
SegWit (P2SH-P2WPKH) addresses start with 'b' (e.g. brDhW3dP3ypoZZ6wuqdL9ueAcbL289nAGH)
Native SegWit (P2WPKH) addresses start with 'bb' (e.g. bb1quzdkde7zpxz7hzdnm54y4sjqqrfkk7pjtpgsmp)

Changed icon
Changed currency name to Bitcoin-Blu (BBLU)

❤️ Support the Movement

If you would like to support the movement, I would be happy if you could help with paying the server bills. You can donate to this Bitcoin address: bc1q60k5y3u0mgc09y3z0t9dyh2t28vj378lsa7m9a

Thank you very much! 🙏