Crypto Finance Development Kit for Go (CFD-GO)

CFD library for Go.

Overview

This library is development kit for crypto finance application. Useful when developing applications for cryptocurrencies.

Target Network

• Bitcoin
• Liquid Network

Support function by cfd

• Bitcoin
  • Bitcoin Script (builder, viewer)
  • Transaction
  • Create, Parse, Decode
  • Simple pubkey-hash sign / verify
  • Estimate Fee
  • Coin Selection (FundRawTransaction)
  • PSBT (v0. v2 & taproot is not yet.)
  • Create, Parse, Decode
  • Simple pubkey-hash sign / verify
  • Estimate Fee
  • Coin Selection (FundRawTransaction)
  • ECDSA Pubkey/Privkey (TweakAdd/Mul, Negate, Sign, Verify)
  • BIP32, BIP39
  • Output Descriptor (contains miniscript parser)
  • Schnorr/Taproot
  • Bitcoin Address (Segwit-v0, Segwit-v1, P2PKH/P2SH)
• Liquid Network
  • Confidential Transaction
  • Blind, Unblind
  • Reissuance
  • Confidential Address

Libraries for each language

• Go : cfd-go
  • C/C++ : cfd
  • Extend the cfd-core library. Defines the C language API and extension classes.
  • C++ : cfd-core
  • Core library. Definition base class.
• other language:
  • JavaScript : cfd-js
  • WebAssembly : cfd-js-wasm
  • Python : cfd-python
  • C# : cfd-csharp
  • Rust : cfd-rust

Dependencies

• Go (1.17 or higher)
• C/C++ Compiler   - can compile c++11
• CMake (3.14.3 or higher)

Windows (MinGW)

attention: Cgo can only be used on the make platform.

(Recommended to use wsl(Windows Subsystem for Linux), because it can be cumbersome.)

download and install files.

• go (1.17 or higher)
• CMake (3.14.3 or higher)
• MinGW (Add to PATH after install)

MacOS

• Homebrew

# xcode cli tools
xcode-select --install

# install dependencies using Homebrew
brew install cmake go

Linux(Ubuntu)

# install dependencies using APT package Manager
apt-get install -y build-essential golang cmake

cmake version 3.14.2 or lower, download from website and install cmake.

go version 1.11 or lower, get golang.org/dl/go1.12 or higher.

---

Build

Using CMake

# recommend out of source build
mkdir build && cd $_
# configure & build
cmake .. -DENABLE_SHARED=on -DCMAKE_BUILD_TYPE=Release -DENABLE_TESTS=off -DENABLE_JS_WRAPPER=off -DENABLE_CAPI=on -DTARGET_RPATH=/usr/local/lib/
make
cd ..
go mod download
go build

CMake options

cmake .. (CMake options) -DENABLE_JS_WRAPPER=off

• -DENABLE_ELEMENTS: Enable functionalies for elements sidechain. [ON/OFF] (default:ON)
• -DENABLE_SHARED: Enable building a shared library. [ON/OFF] (default:OFF)
• -DENABLE_TESTS: Enable building a testing codes. If enables this option, builds testing framework submodules(google test) automatically. [ON/OFF] (default:ON)
• -DCMAKE_BUILD_TYPE=Release: Enable release build.
• -DCMAKE_BUILD_TYPE=Debug: Enable debug build.
• -DCFDCORE_DEBUG=on: Enable cfd debug mode and loggings log files. [ON/OFF] (default:OFF)

---

install / uninstall

On Linux or MacOS, can use install / uninstall.

On Windows, can use releases asset.

Using releases asset

The fastest and easiest way. Target is amd64(x86_64) only.

• macos / linux(ubuntu)

(cleanup)
./tools/cmake_cleanup.sh
sudo ./tools/cleanup_install_files.sh

(download)
wget https://github.com/cryptogarageinc/cfd-go/releases/download/v0.3.2/cfdgo-v0.3.2-ubuntu2004-gcc-x86_64.zip

(unzip)
sudo unzip -q cfdgo-v0.3.2-ubuntu2004-gcc-x86_64.zip -d /

• windows
  1. cleanup: c:/usr/local directory.
  2. download asset.
  3. Unzip and extract to c:/usr/local directory.

install (after build)

install for /usr/local/lib.

Using CMake install

Attention: Currently, there is a problem with ExternalProject, so a problem occurs when performing update processing. Please perform cleanup when building before installation.

(cleanup)
./tools/cmake_cleanup.sh
sudo ./tools/cleanup_install_files.sh

(build)
mkdir build && cd build && cmake .. -DENABLE_SHARED=on -DCMAKE_BUILD_TYPE=Release -DENABLE_TESTS=off -DENABLE_JS_WRAPPER=off -DENABLE_CAPI=on -DTARGET_RPATH=/usr/local/lib && make

(install by using makefile)
cd build && sudo make install

(install by using ninja)
cd build && sudo ninja install

cmake version is 3.15 or higher: cmake --install build

Using releases asset (for install)

Target is amd64(x86_64) only.

• Ubuntu / MacOS

(cleanup)
./tools/cmake_cleanup.sh
sudo ./tools/cleanup_install_files.sh

(download)
wget https://github.com/cryptogarageinc/cfd-go/releases/download/v0.3.2/cfdgo-v0.3.2-ubuntu2004-gcc-x86_64.zip

(unzip)
sudo unzip -q cfdgo-v0.3.2-ubuntu2004-gcc-x86_64.zip -d /

• Windows
  1. get releases asset.
  2. Expand to PATH

uninstall

(uninstall by using makefile)
cd build && sudo make uninstall

(uninstall by using ninja)
cd build && sudo ninja uninstall

(uninstall by using script)
sudo ./tools/cleanup_install_files.sh

---

How to use cfd-go as go module

1. Once, clone this repository.

2. Build & install cfd-go(and dependencies).

3. Modify go.mod file adding cfd-go as go moudle

   go.mod

   require (
     github.com/cryptogarageinc/cfd-go v0.3.2
     ...
   )

   Reference github commit:

   require (
     github.com/cryptogarageinc/cfd-go v1.0.0-0.20191205091101-a48a6a8b1a24
     ...
   )

   (version format: UnknownVersionTag-UtcDate-CommitHash)

4. Download cfd-go module

   go mod download

---

Test and Example

Test

test file is cfdgo_test.go . Execute by the following method.

• shell script or bat file

  (linux/macos)
  ./go_test.sh
  
  (Windows)
  .\go_test.bat

• go command (linux/macos)

  LD_LIBRARY_PATH=./build/Release go test

Example

• cfdgo_test.go

---

Information for developers

managed files

• cfdgo.go, cfdgo.cxx: generated from swig.
• swig.i: swig file.

using library

• cfd
  • cfd-core
  • libwally-core (forked from ElementsProject/libwally-core)
  • univalue (for JSON encoding and decoding)

develop tools

generate from swig.i

attention: At first, install swig and set PATH.

(linux/macos)
./tools/gen_swig.sh

(Windows)
.\tools\gen_swig.bat

formatter

• go fmt
• goimports

use by makefile:

make

(windows)
mingw32-make

mockgen

make generate

(windows)
mingw32-make generate

develop tools by docker compose

generate from swig.i by docker compose

docker-compose run swig

formatter and mockgen by docker compose

docker-compose run formatter

support compilers

• GCC (contains MinGW) (5.x or higher)
• Clang (7.x or higher)

code coverage

(Windows)
.\go_coverage.bat

(Ubuntu / MacOS)
./go_coverage.sh

---

Note

Git connection

Git repository connections default to HTTPS. However, depending on the connection settings of GitHub, you may only be able to connect via SSH. As a countermeasure, forcibly establish SSH connection by setting CFD_CMAKE_GIT_SSH=1 in the environment variable.

• Windows: (On the command line. Or set from the system setting screen.)

  set CFD_CMAKE_GIT_SSH=1

• MacOS & Linux(Ubuntu):

  export CFD_CMAKE_GIT_SSH=1

Ignore git update for CMake External Project

Depending on your git environment, you may get the following error when checking out external:

  Performing update step for 'libwally-core-download'
  Current branch cmake_build is up to date.
  No stash entries found.
  No stash entries found.
  No stash entries found.
  CMake Error at /workspace/cfd-core/build/external/libwally-core/download/libwally-core-download-prefix/tmp/libwally-core-download-gitupdate.cmake:133 (message):

    Failed to unstash changes in:
    '/workspace/cfd-core/external/libwally-core/'.

    You will have to resolve the conflicts manually

This phenomenon is due to the git update related command. Please set an environment variable that skips update processing.

• Windows: (On the command line. Or set from the system setting screen.)

  set CFD_CMAKE_GIT_SKIP_UPDATE=1

• MacOS & Linux(Ubuntu):

  export CFD_CMAKE_GIT_SKIP_UPDATE=1