cculianu/Fulcrum v1.7.0

Fulcrum 1.7.0

on GitHub

What's new:

This is an upgrade & enhancement release of Fulcrum. It provides a couple of new features, as well as some performance improvements and minor bugfixes. The database format remains unchanged and is both forward and backward compatible with previous versions of Fulcrum.

Summary of changes:

• Added Litecoin (LTC) support. (#114)
  • Tested and works with latest Litecoin Core (v0.21.2).
  • Mimble-wimble is "supported" in that it doesn't crash the app, but is mostly ignored since no Electrum clients understand mw txns.
  • It is advised you run litecoind with the -rpcserialversion=1 option so as to prevent serving clients mw txns that they may not understand.
  • Special thanks to Sellix, SRL for requesting and funding Litecoin support.
• Blocks DL: Improved reliability of RPC connection to bitcoind on slow systems (or when downloading huge blocks) (#120)
  • Fixes issue #116
  • Should address the apparently poor performance of Fulcrum as observed in the first Bitcoin Verde BCH Scaling Report
• On startup, proceed anyway if PeerMgr fails to start (but display a warning).
  • Should address issues when using Fulcrum on a chain or coin that is unknown to Fulcrum and for which no servers.json exists.
• Added support for Bitcoin Core (BTC) signet (#108) ( @quad )
• Simplify Docker builds (#106) ( @AaronDewes )
• Fix RPM build error at Copr + cleanup (#111) ( @hegjon )
• Fixed some typos in fulcrum-example-config.conf ( @pseudoramdom )
• Misc. code fix-ups and internal improvements.

A Note about OpenSSL 1.1.1

Note to Linux server admins - There is an extant OpenSSL vulnerability in versions of OpenSSL 1.1.1-1.1.1j. If you are using Qt 5.15 with OpenSSL 1.1.1, it is recommended you update your system OpenSSL to 1.1.1k (or later). The Linux static build does not bundle OpenSSL, but instead loads the system OpenSSL at run-time. So please update your system to use OpenSSL 1.1.1k or later!

Windows static builds do embed OpenSSL, however, and they have been updated below with an embedded OpenSSL 1.1.1k.

Linux Ubuntu 16 (Xenial) static builds are compiled to look for the system OpenSSL 1.0.x series, which does not suffer from the above-linked vulnerability.

If unsure which OpenSSL Fulcrum is using, run ./Fulcrum --version and it should tell you which libssl version it found and is using at runtime.

Pre-compiled binaries for Linux

I have provided two pre-built binaries for Linux:

• Fulcrum-1.7.0-x86_64-linux.tar.gz, which is compiled on an Ubuntu 18.04 system using Docker.
• Fulcrum-1.7.0-arm64-linux.tar.gz, which is compiled on an Ubuntu 18.04 system (for ARM64 bit) using Docker.
• Fulcrum-1.7.0-x86_64-linux-ub16.tar.gz, which is compiled on a stock Ubuntu 16.04 system (using Docker) but with g++ 7.3.0 installed from this ppa source: ppa:jonathonf/gcc-7.3 & ppa:jonathonf/gcc

All 3 of the above binaries contain jemalloc, libzmq, Qt5Core and Qt5Network from Qt 5.15.2 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-1.7.0-win64.zip - Pre-built, statically linked Windows version.
  • It should "just work" on any Windows 7 or above 64-bit system.
  • Includes is a statically-linked Fulcrum.exe, built with jemalloc, libzmq, Qt 5.15.2, OpenSSL 1.1.1k, and gcc 7.5.0.
  • 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!