[Service]: Fulcrum server

MEdGalo commented 2 years ago

Prerequisites

[X] I have searched for existing issues that already suggest this feature.

Describe the Feature Request

Fulcrum is a fast & nimble SPV server for Bitcoin.

Highlights:

Fast: Written in 100% modern C++17 using multi-threaded and asynchronous programming techniques.
A drop-in replacement for ElectrumX
Existing server admins should feel right at home with this software since installation and management of it is nearly identical to ElectrumX server.
Cross-platform: While this codebase was mainly developed and tested on MacOS, Windows and Linux, it should theoretically work on any modern OS (such as *BSD) that has Qt5 Core and Qt5 Networking available.

Describe the Use Case

Fulcrum is a Electrum server implementation that is 22x faster than ElectrumX and ~300x faster than Electrs on initial load. And for wallet refreshes it's 8x faster than ElectrumX, 1.5x faster than Electrs. This mainly due to lower CPU utilisation when serving queries. [1]
Fulcrum’s indexing can be completed in 2-3 days vs 12-24 hours for Electrs and +-7days for ElectrumX. [2]
The main disadvantage of this implementation is that the database size is larger (102 GB) vs 32 GB for Electrs and 75 GB for ElectrumX. [3]

Since the main bottleneck of the RPi 4 in the Embassy products is the CPU, this Electrum server implementation would be an ideal match.

[1] https://www.sparrowwallet.com/docs/server-performance.html#results [2] https://www.sparrowwallet.com/docs/server-performance.html#indexing [3] https://www.sparrowwallet.com/docs/server-performance.html#projects

Describe Preferred Solution

An Fulcrum server app in the Embassy Marketplace.

Describe Alternatives

-

Anything else?

-

kn0wmad commented 2 years ago

Hi there,

Thank you for the request, but this is not an OS feature. Moving to https://github.com/Start9Labs/service-pipeline/issues

leCoq42 commented 4 months ago

Hi, Did the bug you described got fixed in fulcrum 1.10.0?

From the fulcrum release page: Bugfix: In rare circumstances, if the "Download Blocks Task" is interrupted / gets an error, one of the 3 BitcoinD client threads may go out to lunch and never become usable again to do work. Symptoms would include it spamming "Reconnecting ..." messages to the log every 5 seconds. This has been corrected.

https://github.com/cculianu/Fulcrum/releases/tag/v1.10.0

Start9Labs / service-pipeline