cculianu/Fulcrum v1.9.0

Fulcrum 1.9.0

on GitHub

What's new:

This is an important release of Fulcrum focusing on additional CashToken support (BCH only). Support for CashTokens has been expanded with some RPC protocol additions. RPCs such as blockchain.scripthash.listunspent may now (optionally) return token information for UTXOs that contain tokens. Since the API has changed, the maximum electrum-cash protocol version is now 1.5.0. However, by default Fulcrum continues to support protocol 1.4.x and is backwards compatible with clients requesting this protocol version. For more information on the RPC API changes, see the latest changes to the Electrum Cash Protocol Specification.

Additionally, the database format has changed slightly, and your datadir will be automatically upgraded to the new V2 format*. That is, if you run Fulcrum 1.9.0 against your current synched datadir, it will automatically be upgraded to V2. Older Fulcrum versions (which only understand V1) will not be able to read the datadir after it is upgraded, however.

* - The exception to this is if you are running your server synched to current BCH ChipNet, in which case you will need to delete your datadir and resynch because ChipNet has CashTokens activated on it already, and we need to grab on-chain token information again from bitcoind via a full resynch. Fulcrum will complain and exit with an error telling you to resynch if you are on ChipNet.

Note for BTC & LTC users: It is safe to upgrade to this version of Fulcrum if you are using BTC or LTC, since the API changes affect BCH only. This version of Fulcrum behaves identically to previous versions if serving up BTC or LTC blockchain data, with 0 negative performance or other impact for BTC or LTC servers.

Summary of changes:

• Upgaded protocol to to version 1.5. Fulcrum still supports 1.4.x, but 1.5 adds the ability to retrieve CashToken token data for UTXOs containing such data (BCH only).
  • blockchain.*.listunspent now may optionally return token information for UTXOs that contain CashTokens (BCH only).
  • blockchain.utxo.get_into now will return token information if the UTXO in question contains CashTokens (BCH only).
  • blockchain.*.get_balance now may optionally return the balance with or without token UTXOs (BCH only).
  • For a full summary of changes, see: https://electrum-cash-protocol.readthedocs.io/en/latest/protocol-changes.html#version-1-5-0
• Some code cleanup and performance improvement for the blockchain.*.listunspent RPCs.
• Update BCH mainnet & chipnet server lists.

Pre-compiled binaries for Linux

I have provided two pre-built binaries for Linux:

• Fulcrum-1.9.0-x86_64-linux.tar.gz, which is compiled on an Ubuntu 18.04 system using Docker.
• Fulcrum-1.9.0-arm64-linux.tar.gz, which is compiled on an Ubuntu 18.04 system (for ARM64 bit) using Docker.
• Fulcrum-1.9.0-x86_64-linux-ub16.tar.gz, which is compiled on a stock Ubuntu 16.04 system (using Docker) but with g++ 8.1.0 installed from this ppa source: ppa:jonathonf/gcc-8 & ppa:jonathonf/gcc

All 3 of the above binaries contain jemalloc, libzmq, Qt5Core, Qt5Network (from Qt 5.15.6), and OpenSSL 1.1.1 statically linked. They still require libz2, libstd++, and the right libc version as dynamic libs on your system (but those are usually present if you are on a recent system).

If the first regular -linux binary fails, try the second one (-linux-ub16), which should work on older systems, hopefully.

Pre-compiled binaries for Windows

• Fulcrum-1.9.0-win64.zip - Pre-built, statically linked Windows version.
  • It should "just work" on any Windows 10 or above 64-bit system.
  • Includes is a statically-linked Fulcrum.exe, built with jemalloc, libzmq, Qt 5.15.2, OpenSSL 3.0.1, and gcc 11.2.0.
  • Additionally, FulcrumAdmin.exe is included which is the python script, but made into a onefile .exe using PyInstaller.

See the .asc files at the bottom for signatures; my gpg public key can be obtained here: https://github.com/Electron-Cash/keys-n-hashes/blob/master/pubkeys/calinkey.txt

Binary builds for macOS coming soon -- Until then you can always build from source!