README

Stellar
Creating equitable access to the global financial system

Stellar Go Monorepo

Build Status GoDoc Go Report Card

This repo is the home for all of the public Go code produced by the Stellar Development Foundation.

This repo contains various tools and services that you can use and deploy, as well as the SDK you can use to develop applications that integrate with the Stellar network.

Package Index

  • Horizon Server: Full-featured API server for Stellar network
  • Go Horizon SDK - horizonclient: Client for Horizon server (queries and transaction submission)
  • Go Horizon SDK - txnbuild: Construct Stellar transactions and operations
  • Ticker: An API server that provides statistics about assets and markets on the Stellar network
  • Keystore: An API server that is used to store and manage encrypted keys for Stellar client applications
  • Servers for Anchors & Financial Institutions
    • Compliance Server: Allows financial institutions to exchange KYC information
    • Federation Server: Allows organizations to provide addresses for users (jane*examplebank.com)

Dependencies

This repository is officially supported on the last two releases of Go.

It depends on a number of external dependencies, and uses Go Modules to manage them. Running any go command will automatically download dependencies required for that operation.

You can choose to checkout this repository into a GOPATH or into any directory.

Directory Layout

In addition to the other top-level packages, there are a few special directories that contain specific types of packages:

  • clients contains packages that provide client packages to the various Stellar services.
  • exp contains experimental packages. Use at your own risk.
  • handlers contains packages that provide pluggable implementors of http.Handler that make it easier to incorporate portions of the Stellar protocol into your own http server.
  • support contains packages that are not intended for consumption outside of Stellar's other packages. Packages that provide common infrastructure for use in our services and tools should go here, such as db or log.
  • support/scripts contains single-file go programs and bash scripts used to support the development of this repo.
  • services contains packages that compile to applications that are long-running processes (such as API servers).
  • tools contains packages that compile to command line applications.

Each of these directories have their own README file that explain further the nature of their contents.

Other packages

In addition to the packages described above, this repository contains various packages related to working with the Stellar network from a go program. It's recommended that you use godoc to browse the documentation for each.

Package source layout

While much of the code in individual packages is organized based upon different developers' personal preferences, many of the packages follow a simple convention for organizing the declarations inside of a package that aim to aid in your ability to find code.

In each package, there may be one or more of a set of common files:

  • errors.go: This file should contains declarations (both types and vars) for errors that are used by the package.
  • example_test.go: This file should contains example tests, as described at https://blog.golang.org/examples.
  • main.go/internal.go (deprecated): Older packages may have a main.go (public symbols) or internal.go (private symbols). These files contain, respectively, the exported and unexported vars, consts, types and funcs for the package. New packages do not follow this pattern, and instead follow the standard Go convention to co-locate structs and their methods in the same files.
  • main.go (new convention): If present, this file contains a main function as part of an executable main package.

In addition to the above files, a package often has files that contains code that is specific to one declared type. This file uses the snake case form of the type name (for example loggly_hook.go would correspond to the type LogglyHook). This file should contain method declarations, interface implementation assertions and any other declarations that are tied solely to that type.

Each non-test file can have a test counterpart like normal, whose name ends with _test.go. The common files described above also have their own test counterparts... for example internal_test.go should contains tests that test unexported behavior and more commonly test helpers that are unexported.

Generally, file contents are sorted by exported/unexported, then declaration type (ordered as consts, vars, types, then funcs), then finally alphabetically.

Test helpers

Often, we provide test packages that aid in the creation of tests that interact with our other packages. For example, the support/db package has the support/db/dbtest package underneath it that contains elements that make it easier to test code that accesses a SQL database. We've found that this pattern of having a separate test package maximizes flexibility and simplifies package dependencies.

Contributing

Contributions are welcome! See CONTRIBUTING.md for more details.

Developing

See DEVELOPING.md for helpful instructions for getting started developing code in this repository.

Expand ▾ Collapse ▴

Directories

Path Synopsis
Package address provides utility functions for working with stellar addresses.
Package address provides utility functions for working with stellar addresses.
Package amount provides utilities for converting numbers to/from the format used internally to stellar-core.
Package amount provides utilities for converting numbers to/from the format used internally to stellar-core.
Package clients contains sub-packages that provide client access to the various stellar services.
Package clients contains sub-packages that provide client access to the various stellar services.
horizonclient
Package horizonclient provides client access to a Horizon server, allowing an application to post transactions and look up ledger information.
Package horizonclient provides client access to a Horizon server, allowing an application to post transactions and look up ledger information.
stellarcore
Package stellarcore is a client library for communicating with an instance of stellar-core using through the server's HTTP port.
Package stellarcore is a client library for communicating with an instance of stellar-core using through the server's HTTP port.
Package crc16 is implementation according to CCITT standards.
Package crc16 is implementation according to CCITT standards.
exp
Package exp houses experimental packages related to Stellar developement
Package exp houses experimental packages related to Stellar developement
crypto/derivation
Package derivation provides functions for ed25519 key derivation as described in: https://github.com/satoshilabs/slips/blob/master/slip-0010.md
Package derivation provides functions for ed25519 key derivation as described in: https://github.com/satoshilabs/slips/blob/master/slip-0010.md
support/jwtkey
Package jwtkey provides utility functions for generating, serializing and deserializing JWT ECDSA keys.
Package jwtkey provides utility functions for generating, serializing and deserializing JWT ECDSA keys.
support/pipeline
TODO explain here how to write wrappers to use without casting from `interface{}`.
TODO explain here how to write wrappers to use without casting from `interface{}`.
handlers
federation
Package federation provides a pluggable handler that satisfies the Stellar federation protocol.
Package federation provides a pluggable handler that satisfies the Stellar federation protocol.
Package ingest provides primitives for building custom ingestion engines.
Package ingest provides primitives for building custom ingestion engines.
Package meta provides helpers for processing the metadata that is produced by stellar-core while processing transactions.
Package meta provides helpers for processing the metadata that is produced by stellar-core while processing transactions.
Package network contains functions that deal with stellar network passphrases and IDs.
Package network contains functions that deal with stellar network passphrases and IDs.
Package price implements functions to ease working with stellar price values.
Package price implements functions to ease working with stellar price values.
protocols
horizon
Package horizon contains the type definitions for all of horizon's response resources.
Package horizon contains the type definitions for all of horizon's response resources.
Package services contains sub-packages that provide long-running applications such as API servers.
Package services contains sub-packages that provide long-running applications such as API servers.
Package strkey is an implementation of StrKey, the address scheme for the StellarNetwork.
Package strkey is an implementation of StrKey, the address scheme for the StellarNetwork.
support
app
Package app provides vars that can be populated via "-X" linker flags to provide global application metadata, such as build time or version.
Package app provides vars that can be populated via "-X" linker flags to provide global application metadata, such as build time or version.
config
Package config provides a common infrastructure for reading configuration data stored in local TOML files.
Package config provides a common infrastructure for reading configuration data stored in local TOML files.
db
Package db is the base package for database access at stellar.
Package db is the base package for database access at stellar.
db/sqlutils
Package sqlutils contains utility functions for manipulating strings of SQL
Package sqlutils contains utility functions for manipulating strings of SQL
env
errors
Package errors provides the common infrastructure for managing errors.
Package errors provides the common infrastructure for managing errors.
http
Package http provides easy access to Stellar's best practices for building http servers.
Package http provides easy access to Stellar's best practices for building http servers.
http/httpauthz
Package httpauthz contains helper functions for parsing the 'Authorization' header in HTTP requests.
Package httpauthz contains helper functions for parsing the 'Authorization' header in HTTP requests.
http/httptest
Package httptest enhances the stdlib net/http/httptest package by integrating it with gopkg.in/gavv/httpexpect.v1, reducing the boilerplate needed for http tests.
Package httptest enhances the stdlib net/http/httptest package by integrating it with gopkg.in/gavv/httpexpect.v1, reducing the boilerplate needed for http tests.
http/mutil
Package mutil contains various functions that are helpful when writing http middleware.
Package mutil contains various functions that are helpful when writing http middleware.
log
Package log provides the common logging facilities used by the Stellar Development foundation.
Package log provides the common logging facilities used by the Stellar Development foundation.
render/health
Package health contains simple utilities for implementing a /health endpoint that adheres to the requirements defined in the draft IETF network working group standard, Health Check Response Format for HTTP APIs.
Package health contains simple utilities for implementing a /health endpoint that adheres to the requirements defined in the draft IETF network working group standard, Health Check Response Format for HTTP APIs.
render/problem
Package problem provides utility functions for rendering errors as RFC7807 compatible responses.
Package problem provides utility functions for rendering errors as RFC7807 compatible responses.
test
Package test contains simple test helpers that should not have any service-specific dependencies.
Package test contains simple test helpers that should not have any service-specific dependencies.
url
tools
stellar-sign
stellar-sign is a small interactive utility to help you contribute a signature to a transaction envelope.
stellar-sign is a small interactive utility to help you contribute a signature to a transaction envelope.
Package txnbuild implements transactions and operations on the Stellar network.
Package txnbuild implements transactions and operations on the Stellar network.
cmd/demo
Demo is an interactive demonstration of the Go SDK using the Stellar TestNet.
Demo is an interactive demonstration of the Go SDK using the Stellar TestNet.
cmd/demo/operations
Package demo is an interactive demonstration of the Go SDK using the Stellar TestNet.
Package demo is an interactive demonstration of the Go SDK using the Stellar TestNet.
examplehorizonclient
Package examplehorizonclient provides a dummy client for use with the GoDoc examples.
Package examplehorizonclient provides a dummy client for use with the GoDoc examples.
Package xdr contains the generated code for parsing the xdr structures used for stellar.
Package xdr contains the generated code for parsing the xdr structures used for stellar.