README.md

# Eos

[![Build Status](https://travis-ci.org/EOSIO/eos.svg?branch=master)](https://travis-ci.org/EOSIO/eos)

Welcome to the EOS.IO source code repository!

## Getting Started
The following instructions overview the process of getting the software, building it, running a simple test network that produces blocks, account creation and uploading a sample contract to the blockchain.

## Setting up a build/development environment
This project is written primarily in C++14 and uses CMake as its build system. An up-to-date Clang and the latest version of CMake is recommended.

Dependencies:

* Clang 4.0.0
* CMake 3.5.1
* Boost 1.64
* OpenSSL
* LLVM 4.0
* [secp256k1-zkp (Cryptonomex branch)](https://github.com/cryptonomex/secp256k1-zkp.git)
* [binaryen](https://github.com/WebAssembly/binaryen.git)

### Clean install Ubuntu 16.10

Install the development toolkit:

```commandline
sudo apt-get update
wget -O - https://apt.llvm.org/llvm-snapshot.gpg.key|sudo apt-key add -
sudo apt-get install clang-4.0 lldb-4.0 cmake make \
                     libbz2-dev libssl-dev libgmp3-dev \
                     autotools-dev build-essential \
                     libbz2-dev libicu-dev python-dev \
                     autoconf libtool git
```

Install Boost 1.64:

```commandline
cd ~
wget -c 'https://sourceforge.net/projects/boost/files/boost/1.64.0/boost_1_64_0.tar.bz2/download' -O boost_1.64.0.tar.bz2
tar xjf boost_1.64.0.tar.bz2
cd boost_1_64_0/
echo "export BOOST_ROOT=$HOME/opt/boost_1_64_0" >> ~/.bash_profile
source ~/.bash_profile
./bootstrap.sh "--prefix=$BOOST_ROOT"
./b2 install
source ~/.bash_profile
```

Install [secp256k1-zkp (Cryptonomex branch)](https://github.com/cryptonomex/secp256k1-zkp.git):
        
```commandline
cd ~
git clone https://github.com/cryptonomex/secp256k1-zkp.git
cd secp256k1-zkp
./autogen.sh
./configure
make
sudo make install
```

Also, to use the WASM compiler, eos has an external dependency on [binaryen](https://github.com/WebAssembly/binaryen.git):

```commandline
cd ~
git clone https://github.com/WebAssembly/binaryen.git
cd ~/binaryen
git checkout tags/1.37.14
cmake . && make

```

Add BINARYEN_ROOT to your .bash_profile:

```commandline
echo "export BINARYEN_ROOT=~/binaryen" >> ~/.bash_profile
source ~/.bash_profile
```

By default LLVM and clang do not include the WASM build target, so you will have to build it yourself:

```commandline
mkdir  ~/wasm-compiler
cd ~/wasm-compiler
git clone --depth 1 --single-branch --branch release_40 https://github.com/llvm-mirror/llvm.git
cd llvm/tools
git clone --depth 1 --single-branch --branch release_40 https://github.com/llvm-mirror/clang.git
cd ..
mkdir build
cd build
cmake -G "Unix Makefiles" -DCMAKE_INSTALL_PREFIX=.. -DLLVM_TARGETS_TO_BUILD= -DLLVM_EXPERIMENTAL_TARGETS_TO_BUILD=WebAssembly -DCMAKE_BUILD_TYPE=Release ../
make -j4 install
```

### macOS Sierra 10.12.6

macOS additional Dependencies:

* Brew
* Newest XCode

Upgrade your XCode to the newest version:

```commandline
xcode-select --install
```

Install homebrew:

```commandline
ruby -e "$(curl -fsSL https://raw.githubusercontent.com/Homebrew/install/master/install)"
```

Install the dependencies:

```commandline
brew update
brew install git automake libtool boost openssl llvm
```

Install [secp256k1-zkp (Cryptonomex branch)](https://github.com/cryptonomex/secp256k1-zkp.git):
        
```commandline
cd ~
git clone https://github.com/cryptonomex/secp256k1-zkp.git
cd secp256k1-zkp
./autogen.sh
./configure
make
sudo make install
```

Install [binaryen v1.37.14](https://github.com/WebAssembly/binaryen.git):

```commandline
cd ~
git clone https://github.com/WebAssembly/binaryen.git
cd ~/binaryen
git checkout tags/1.37.14
cmake . && make
```

Add BINARYEN_ROOT to your .bash_profile:

```commandline
echo "export BINARYEN_ROOT=~/binaryen" >> ~/.bash_profile
source ~/.bash_profile
```


Build LLVM and clang for WASM:

```commandline
mkdir  ~/wasm-compiler
cd ~/wasm-compiler
git clone --depth 1 --single-branch --branch release_40 https://github.com/llvm-mirror/llvm.git
cd llvm/tools
git clone --depth 1 --single-branch --branch release_40 https://github.com/llvm-mirror/clang.git
cd ..
mkdir build
cd build
cmake -G "Unix Makefiles" -DCMAKE_INSTALL_PREFIX=.. -DLLVM_TARGETS_TO_BUILD= -DLLVM_EXPERIMENTAL_TARGETS_TO_BUILD=WebAssembly -DCMAKE_BUILD_TYPE=Release ../
make -j4 install
```

Add WASM_LLVM_CONFIG and LLVM_DIR to your .bash_profile:

```commandline
echo "export WASM_LLVM_CONFIG=~/wasm-compiler/llvm/bin/llvm-config" >> ~/.bash_profile
echo "export LLVM_DIR=/usr/local/Cellar/llvm/4.0.1/lib/cmake/llvm" >> ~/.bash_profile
source ~/.bash_profile
```

## Building and running a node

### Getting the code
To download all of the code, download Eos and a recursion or two of submodules. The easiest way to get all of this is to do a recursive clone:

`git clone https://github.com/eosio/eos --recursive`

If a repo is cloned without the `--recursive` flag, the submodules can be retrieved after the fact by running this command from within the repo:

`git submodule update --init --recursive`

### Using the WASM compiler to perform a full build of the project

The WASM_LLVM_CONFIG environment variable is used to find our recently built WASM compiler.
This is needed to compile the example contracts inside eos/contracts folder and their respective tests.

```commandline
cd ~
git clone https://github.com/eosio/eos --recursive
mkdir -p ~/eos/build && cd ~/eos/build
cmake -DBINARYEN_BIN=~/binaryen/bin ..
make -j4
```

Out-of-source builds are also supported. To override clang's default choice in compiler, add these flags to the CMake command:

`-DCMAKE_CXX_COMPILER=/path/to/c++ -DCMAKE_C_COMPILER=/path/to/cc`

For a debug build, add `-DCMAKE_BUILD_TYPE=Debug`. Other common build types include `Release` and `RelWithDebInfo`.

To run the test suite after building, run the `chain_test` executable in the `tests` folder.

EOS comes with a number of programs you can find in `~/eos/build/programs`. They are listed below:

* eosd - server-side blockchain node component
* eosc - command line interface to interact with the blockchain
* eos-walletd - EOS wallet
* launcher - application for nodes network composing and deployment; [more on launcher](https://github.com/EOSIO/eos/blob/master/testnet.md)

### Creating and launching a single-node testnet

After successfully building the project, the `eosd` binary should be present in the `programs/eosd` directory. Go ahead and run `eosd` -- it will probably exit with an error, but if not, close it immediately with Ctrl-C. Note that `eosd` created a directory named `data-dir` containing the default configuration (`config.ini`) and some other internals. This default data storage path can be overridden by passing `--data-dir /path/to/data` to `eosd`.

Edit the `config.ini` file, adding the following settings to the defaults already in place:

```
# Load the testnet genesis state, which creates some initial block producers with the default key
genesis-json = /path/to/eos/source/genesis.json
# Enable production on a stale chain, since a single-node test chain is pretty much always stale
enable-stale-production = true
# Enable block production with the testnet producers
producer-name = inita
producer-name = initb
producer-name = initc
producer-name = initd
producer-name = inite
producer-name = initf
producer-name = initg
producer-name = inith
producer-name = initi
producer-name = initj
producer-name = initk
producer-name = initl
producer-name = initm
producer-name = initn
producer-name = inito
producer-name = initp
producer-name = initq
producer-name = initr
producer-name = inits
producer-name = initt
producer-name = initu
# Load the block producer plugin, so you can produce blocks
plugin = eos::producer_plugin
# Wallet plugin
plugin = eos::wallet_api_plugin
# As well as API and HTTP plugins
plugin = eos::chain_api_plugin
plugin = eos::http_plugin
```

Now it should be possible to run `eosd` and see it begin producing blocks. At present, the P2P code is not implemented, so only single-node configurations are possible. When the P2P networking is implemented, these instructions will be updated to show how to create an example multi-node testnet.

When running `eosd` you should get log messages similar to below. It means the blocks are successfully produced.

```
1575001ms thread-0   chain_controller.cpp:235      _push_block          ] initm #1 @2017-09-04T04:26:15  | 0 trx, 0 pending, exectime_ms=0
1575001ms thread-0   producer_plugin.cpp:207       block_production_loo ] initm generated block #1 @ 2017-09-04T04:26:15 with 0 trxs  0 pending
1578001ms thread-0   chain_controller.cpp:235      _push_block          ] initc #2 @2017-09-04T04:26:18  | 0 trx, 0 pending, exectime_ms=0
1578001ms thread-0   producer_plugin.cpp:207       block_production_loo ] initc generated block #2 @ 2017-09-04T04:26:18 with 0 trxs  0 pending
1581001ms thread-0   chain_controller.cpp:235      _push_block          ] initd #3 @2017-09-04T04:26:21  | 0 trx, 0 pending, exectime_ms=0
1581001ms thread-0   producer_plugin.cpp:207       block_production_loo ] initd generated block #3 @ 2017-09-04T04:26:21 with 0 trxs  0 pending
1584000ms thread-0   chain_controller.cpp:235      _push_block          ] inite #4 @2017-09-04T04:26:24  | 0 trx, 0 pending, exectime_ms=0
1584000ms thread-0   producer_plugin.cpp:207       block_production_loo ] inite generated block #4 @ 2017-09-04T04:26:24 with 0 trxs  0 pending
1587000ms thread-0   chain_controller.cpp:235      _push_block          ] initf #5 @2017-09-04T04:26:27  | 0 trx, 0 pending, exectime_ms=0
```

## Accounts and smart contracts

EOS comes with example contracts that can be uploaded and run for testing purposes. To upload and test them, please follow the steps below.

### Example smart contracts

To publish sample smart contracts you need to create accounts for them.

Run the node:

```commandline
cd ~/eos/build/programs/eosd/
./eosd
```

### Run eos-walletd and importing account key

Before running API commands you need to import the private key of an account you will be authorizing the transactions under into the EOS wallet.

As you've previously added `plugin = eos::wallet_api_plugin` into `config.ini`, EOS wallet will be running as a part of `eosd` process.

For testing purposes you can use a pre-created account `inita` from the `genesis.json` file.

To login you need to run a command importing an active (not owner!) private key from `inita` account (you can find it in `~/eos/build/programs/eosd/data-dir/config.ini`) to the wallet.

```commandline
cd ~/eos/build/programs/eosc/
./eosc wallet create # Outputs a password that you need to save to be able to lock/unlock the wallet
./eosc wallet import 5KQwrPbwdL6PhXujxW37FSSQZ1JiwsST4cqQzDeyXtP79zkvFD3
```

Now you can issue API commands under `inita` authority.

### Create accounts for your smart contracts

First, generate public/private key pairs for the `owner_key` and `active_key`. You will need them to create an account:

```commandline
cd ~/eos/build/programs/eosc/
./eosc create key
./eosc create key
```

You will get two pairs of a public and private key:

```
Private key: XXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXX
Public key:  XXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXX
```

Save the values for future reference.

Run `create` command where `PUBLIC_KEY_1` and `PUBLIC_KEY_2` are the values generated by the `create key` command:

```commandline
./eosc create account inita currency PUBLIC_KEY_1 PUBLIC_KEY_2 
```

You should get a json response back with a transaction ID confirming it was executed successfully.

Check that account was successfully created: 

```commandline
./eosc get account currency
```

You should get a response similar to this:

```json
{
  "name": "currency",
  "eos_balance": 0,
  "staked_balance": 1,
  "unstaking_balance": 0,
  "last_unstaking_time": "2106-02-07T06:28:15"
}
```

### Upload sample contract

Before uploading a contract, you can verify that there is no current contract:

```commandline
./eosc get code currency 
code hash: 0000000000000000000000000000000000000000000000000000000000000000
```

With an account for a contract created, you can upload a sample contract:

```commandline
./eosc set contract currency ../../../contracts/currency/currency.wast ../../../contracts/currency/currency.abi
```

As a response you should get a json with a `transaction_id` field. Your contract was successfully uploaded!

You can also verify that the code has been set:

```commandline
./eosc get code currency
code hash: 9b9db1a7940503a88535517049e64467a6e8f4e9e03af15e9968ec89dd794975
```

Next you can verify that the currency contract has the proper initial balance:

```commandline
./eosc get table currency currency account
{
  "rows": [{
     "account": "account",
     "balance": 1000000000
     }
  ],
  "more": false
}
```

### Push a message to a sample contract

To send a message to a contract you need to create a new user account who will be sending the message.

Firstly, generate the keys for the account:

```commandline
cd ~/eos/build/programs/eosc/
./eosc create key
./eosc create key
```

And then create the `tester` account:

```commandline
./eosc create account inita tester PUBLIC_USER_KEY_1 PUBLIC_USER_KEY_2 
```

After this you can send a message to the contract:

```commandline
./eosc push message currency transfer '{"from":"currency","to":"inita","amount":50}' --scope currency,inita --permission currency@active
```

As a confirmation of a successfully submitted transaction you will get a json with a `transaction_id` field.

### Reading Currency Contract Balance

```commandline
./eosc get table inita currency account
{
  "rows": [{
      "account": "account",
      "balance": 50 
       }
    ],
  "more": false
}
./eosc get table currency currency account
{
  "rows": [{
      "account": "account",
      "balance": 999999950
    }
  ],
  "more": false
}
```

## Running local testnet

To run a local testnet you can use a `launcher` application provided in `~/eos/build/programs/launcher` folder.

For testing purposes you will run 2 local production nodes talking to each other.

```commandline
cd ~/eos/build
cp ../genesis.json ./
./programs/launcher/launcher -p2 -s testnet.json -l local
```

This command will generate 2 data folder for each instance of the node: `tn_data_0` and `tn_data_1`, as well as `testnet.json` file for the testnet configuration.

You should see a following response:

```commandline
adding hostname ip-XXX-XXX-XXX
found interface 127.0.0.1
found interface XXX.XX.XX.XX
spawning child, programs/eosd/eosd --skip-transaction-signatures --data-dir tn_data_0
spawning child, programs/eosd/eosd --skip-transaction-signatures --data-dir tn_data_1
```

To confirm the nodes are running, run following `eosc` commands:
```commandline
~/eos/build/programs/eosc
./eosc -p 8888 get info
./eosc -p 8889 get info
```

For each you should get a json with a blockchain information.

You can read more on launcher and its settings [here](https://github.com/EOSIO/eos/blob/master/testnet.md)

## Run eos in docker

Simple and fast setup of EOS on Docker is also available. Firstly, install dependencies:

 - [Docker](https://docs.docker.com)
 - [Docker-compose](https://github.com/docker/compose)
 - [Docker-volumes](https://github.com/cpuguy83/docker-volumes)

Build eos image

```
git clone https://github.com/EOSIO/eos.git --recursive
cd eos
cp genesis.json Docker 
docker build -t eosio/eos -f Docker/Dockerfile .
```

We recommend 6GB+ of memory allocated to Docker to successfully build the image.

Now you can start the Docker container:

```
sudo rm -rf /data/store/eos # options 
sudo mkdir -p /data/store/eos
docker-compose -f Docker/docker-compose.yml up
```

Get chain info:

```
curl http://127.0.0.1:8888/v1/chain/get_info
```

### Run contract in docker example

You can run the `eosc` commands via `docker exec` command. For example:

```
docker exec docker_eos_1 eosc contract exchange contracts/exchange/exchange.wast contracts/exchange/exchange.abi
```