Licence: MIT Licence
Language: Python (>= 3.10)

Electrum-Bitmark is a lightweight wallet for Bitmark (ticker BTMK). It is a fork of Electrum 4.7.2, adapted for Bitmark's chain. It talks to an electrumx-bitmark server rather than to a full node directly, so it stays light and fast.

Bitmark is a 2014-era multi-algorithm chain, which required real changes beyond re-branding:

• 8 PoW algorithms (scrypt, sha256d, yescrypt, argon2, x17, lyra2rev2, equihash, cryptonight) with the algorithm encoded in the block version. Header parsing/serialization/hashing is algo-aware (electrum/blockchain.py).
• Variable-length headers. Most blocks use the standard 80-byte header; equihash blocks use a Zcash-style ~1487-byte extended header (hashed in full, "GetHashE"). Header storage and chunk download handle the mixed sizes.
• AuxPoW (merged mining). The auxpow blob is stripped from served headers (it is not part of the block identity hash).
• No SegWit / Taproot. Wallets default to legacy P2PKH addresses (start with b).
• Per-algo Dark Gravity Wave difficulty is not reimplemented in the wallet; header-chain integrity comes from prev-hash linkage plus hardcoded checkpoints.
• BTMK base units and Electrum-Bitmark branding.

Network parameters (from the Bitmark daemon's chainparams.cpp): P2PKH 0x55, P2SH 0x05, WIF 0xd5, genesis c1fb746e…79137cb.

python3 -m venv venv && source venv/bin/activate
pip install -e .
pip install cryptography pycryptodomex   # binary deps
# GUI also needs: pip install PyQt6 qdarkstyle

# point at an electrumx-bitmark server and run
./run_electrum --offline setconfig server "<host>:50001:t"
./run_electrum                # GUI
# or headless:
./run_electrum daemon -d && ./run_electrum load_wallet && ./run_electrum getinfo

Create a wallet with ./run_electrum create — it defaults to a legacy seed, so you get b… addresses automatically.

Stage 2: connects to a local/trusted ElectrumX server, verifies the full header chain across all algorithms, generates legacy addresses, and queries balances/history. Public-server infrastructure (Stage 3) is future work.

Built on Electrum by Thomas Voegtlin and contributors. See LICENCE and the upstream project for the base wallet documentation.