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Orbs Contract SDK
Getting Started
About smart contracts
Becoming a Go developer
Installing Gamma - local blockchain
Deploying your first contract
The Orbs Starter Kit
Downloading the Contract SDK
Orbs Contracts
Smart contracts
Layout of a contract file
Data types (Exported Functions)
State
Address
Events
Error handling
Calling other contracts
Calling Ethereum contract
API Reference
Limitations of Orbs Contracts
Creating a new contract
Gamma in Depth
Starting and stopping the server
Test keys and accounts
Deploying smart contracts
Sending transactions and queries
Checking sent transaction status
Reading Logs from Contracts
Working with multiple environments
Upgrading to latest versions
Gamma server under the hood
Deploying Gamma in the Cloud
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Installing Gamma - local blockchain
Gamma is a personal Orbs blockchain running locally that allows developers to easily test, run, and deploy smart contracts.

Prerequisite

Gamma uses Docker to run a personal blockchain with multiple nodes locally. Make sure Docker is available on your machine.

On MAC

See installation instructions here.

On Linux

Install the community edition using the convenience script here.

Installing Gamma Command Line Tool

Next, install the Gamma CLI. gamma-cli is the command line tool for developers to interact with a Gamma server instance running on their machine.

On Mac

Use brew​
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brew install orbs-network/devtools/gamma-cli
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On Linux

Run the gamma-cli install script in terminal:
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https://raw.githubusercontent.com/orbs-network/gamma-cli/master/gammacli-linux-install-v0.7.0.sh | bash
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Verify

Verify the installation by running:
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gamma-cli version
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Using Gamma CLI

You can see the various commands supported by the CLI by running in terminal
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gamma-cli help
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You can use the CLI to start and stop Gamma server, deploy contracts and send transactions.

Installing the Gamma server

Gamma server is an in-memory virtual chain on top of an Orbs blockchain with several nodes on your local machine. The server allows you to test your contracts locally before deploying them to production.
If the server isn't installed yet, gamma-cli installs it automatically.
So far, we only installed the cli tool. Now, start the Gamma server by running the following command in the terminal. The CLI tool will notice the server is not installed and will install it for you:
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gamma-cli start-local
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If everything went well, you now have a running ORBS blockchain on your local machine. Yes, it's that simple! You can browse to http://localhost:8080/ to view the status of your local ORBS instance.
The start-local comands also runs our block explorer, Prism. You can use Prism to get more info about your blockchain instance by browsing to http://localhost:3000/.
When finished with the server, stop it by running in terminal
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gamma-cli stop-local
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Getting Started - Previous
Becoming a Go developer
Next - Getting Started
Deploying your first contract
Last modified 2yr ago
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Contents
Prerequisite
On MAC
On Linux
Installing Gamma Command Line Tool
On Mac
On Linux
Verify
Using Gamma CLI
Installing the Gamma server