sigma_rb

Ruby wrapper around C bindings for ErgoLib from Sigma-Rust

Installation

This project wraps the C bindings of Sigma-Rust and so they are required for using this gem. As the Sigma-Rust API changes over time, gem versions are tied to specific Sigma-Rust versions.

Sigma_rb Version	Sigma-Rust Version
0.1.3 - 0.1.5	0.16.0

Build ErgoLib Dependencies

Checkout the supported Sigma-Rust version on the releases page .

Build the ergo-lib-c bindings

I will provide instructions below but it may be worth reading over the directions in Sigma-Rust too

Sigma-Rust uses Rust to generate these C bindings and so you will need Rust. I recommend downloading the nightly version of Rust as you will need nightly Rust for the next step.

After checking out the proper Sigma-Rust and starting at it's root directory:

cd bindings/ergo-lib-c
cargo build --release -p ergo-lib-c

This will build a release version of libergo.a located at target/release/libergo.a from the root directory. You will need to copy/move this to a C LIBRARY search path on your system. For my system I can use /usr/local/lib . This usually depends on OS.

So I did this to copy libergo.a to /usr/local/lib :

sudo cp ../../target/release/libergo.a /usr/local/lib/

Build ergo-lib-c header file

While still in the bindings/ergo-lib_c directory you can generate the header file with:

cbindgen --config cbindgen.toml --crate ergo-lib-c --output h/ergo_lib.h

You will need to copy/move this header to a C INCLUDE search path. On my system I can use /usr/local/include . So I ran the following command to copy the header:

sudo cp h/ergo_lib.h /usr/local/include/

Add to Gemfile

Once you have libergo.a and ergo_lib.h downloaded and placed in locations your C compiler can find you should be able to to install the gem.

In Gemfile

gem 'sigma_rb', '0.1.3'

Run bundle to install

bundle

After a successful install you can use it by requiring sigma

require 'sigma'

puts Sigma::BoxValue.units_per_ergo

Examples

Check out tests/sigma for usage examples. The transaction tests are probably the most involved, located at tests/sigma/transaction_test.rb.

Documentation

Generated documentation can be viewed on RubyDoc.

Thank You

Thank you to the Ergo Development community for consistent words of encouragement. Big thanks to Sigma-Rust maintainers for providing the C bindings which made this possible. Thank you to the iOS bindings developers as it was a constant reference for this work.