KREEL Core

KREEL Core is the KREEL blockchain node software and command-line wallet software. For UI reference wallet software (browser-based wallet) visit KREEL UI.

Branch	Build Status
`master`
`testnet`
`master` of `bitshares-fc`

Resources

KREEL Core is a fork of BitShares Core.

Visit BitShares.github.io to learn about BitShares and join the community at BitSharesTalk.org.

Information for developers can be found in the Wiki and the BitShares Developer Portal. Users interested in how BitShares works can go to the BitShares Documentation site.

Visit Awesome BitShares to find more resources and links E.G. chat groups, client libraries and extended APIs.

KREEL Core
Resources

Getting Started

Build instructions and additional documentation are available in the Wiki.

Installing Node and Command-Line Wallet Software

We recommend building on Ubuntu 20.04 LTS (64-bit)

Install Operating System Dependencies:

sudo apt-get update
sudo apt-get install autoconf cmake make automake libtool git libboost-all-dev libssl-dev g++ libcurl4-openssl-dev doxygen

Build Node And Command-Line Wallet:

git clone https://github.com/ecolom-kz/kreel-core.git
cd bitshares-core
git checkout master # may substitute "master" with current release tag
git submodule update --init --recursive
mkdir build
cd build
cmake -DCMAKE_BUILD_TYPE=Release ..
make

NOTE:

Kreel-core requires a 64-bit operating system to build, and will not build on a 32-bit OS. Tested operating systems:
- Linux (heavily tested with Ubuntu LTS releases)
- macOS (various versions)
- Windows (various versions, Visual Studio and MinGW)
- OpenBSD (various versions)
Kreel-core requires Boost libraries to build, supports version 1.58 to 1.74. Newer versions may work, but have not been tested. If your system came pre-installed with a version of Boost libraries that you do not wish to use, you may manually build your preferred version and use it with BitShares by specifying it on the CMake command line.

Example: cmake -DBOOST_ROOT=/path/to/boost ..
Kreel-core requires OpenSSL libraries to build, supports version 1.0.2 to 1.1.1. If your system came pre-installed with a version of OpenSSL libraries that you do not wish to use, you may manually build your preferred version and use it with BitShares by specifying it on the CMake command line.

Example: cmake -DOPENSSL_ROOT_DIR=/path/to/openssl ..

Running and Stopping Node Software

Run Node Software:

Stay on kreel-core/build directory before you run the below witness_node command

./programs/witness_node/witness_node

Under build directory the node run will automatically create the directory witness_node_data_dir along with config files underneath then start synchronizing the blockchain. It may take usually several hours to fully synchronize the blockchain data. The blockchain data will be stored under the directory witness_node_data_dir.

Stop Node Software:

For stopping the node run cleanly, you will need to access the node run terminal then press on Ctrl+C then wait for the run to stop, please note that it may take usually few minutes to exit the run. It's recommended to use linux command screen to initiate the node run so you can go back to the node run screen to stop it.

IMPORTANT: By default the node will start in reduced memory mode by using some of the commands detailed in Memory reduction for nodes. In order to run a full node with all the account histories which usually unnecessary, you need to remove partial-operations and max-ops-per-account from your config file.

To use the command-line wallet or other wallets / clients with the node, the node need to be started with RPC connection enabled, which can be done by starting the node with the --rpc-endpoint parameter, E.G.

./programs/witness_node/witness_node --rpc-endpoint=127.0.0.1:8980

or configure it in the config file by editing witness_node_data_dir/config.ini as follows:

rpc-endpoint = 127.0.0.1:8980

You can run the program with --help parameter to see more info:

./programs/witness_node/witness_node --help

Using Command-Line Wallet

Stay on kreel-core/build directory before you run the below cli_wallet command

./programs/cli_wallet/cli_wallet

IMPORTANT: The cli_wallet or API interfaces to the node wouldn't be fully functional unless the node is fully synchronized with the blockchain. The cli_wallet command info will show result head_block_age which will tell you how far you are from the live current block of the blockchain.

To check your current block:

new >>> info

To query the blockchain, E.G. get info about an account:

new >>> get_account <account_name_or_id>

If you need to transact with your account but not only query, firstly set your initial password and unlock the wallet:

For non-Windows operating systems, you can type the commands and press [ENTER], then input the password and press [ENTER], in this case the password won't show:
```
new >>> set_password [ENTER]
Enter password:
locked >>> unlock [ENTER]
Enter password:
unlocked >>>
```
For Windows, or you'd like to show the password, type the commands with the password:
```
new >>> set_password <PASSWORD>
locked >>> unlock <PASSWORD>
unlocked >>>
```

To be able to transact with your account, import the corresponding private keys:

unlocked >>> import_key <ACCOUNT_NAME> <WIF_KEY>

The private keys will be encrypted and stored in the wallet file, the file name is wallet.json by default. The private keys are accessible when the wallet is unlocked.

unlocked >>> dump_private_keys

Use lock command to make the private keys inaccessible. There is no auto-lock feature so far.

unlocked >>> lock

To import your initial (genesis) balances, import the private keys corresponding to the balances:

unlocked >>> import_balance <ACCOUNT_NAME> [<WIF_KEY> ...] true

Use help to see all available wallet commands.

>>> help

Use gethelp <COMMAND> to see more info about individual commands. E.G.

>>> gethelp get_order_book

The definition of all commands is available in the wallet.hpp souce code file. Corresponding documentation can be found in the Doxygen documentation.

You can run the program with --help parameter to see more info:

./programs/cli_wallet/cli_wallet --help

There is also some info in the Wiki.

Support

Please open an issue in this repository

Up to date online Doxygen documentation can be found at Doxygen.BitShares.org.

Using Built-In APIs

Node API

The witness_node software provides several different API sets, known as node API.

Each API set has its own ID and a name. When running witness_node with RPC connection enabled, initially two API sets are available:

API set with ID 0 has name "database", it provides read-only access to the database,
API set with ID 1 has name "login", it is used to login and gain access to additional, restrictable API sets.

Here is an example using wscat package from npm for websockets:

$ npm install -g wscat
$ wscat -c ws://127.0.0.1:8980
> {"id":1, "method":"call", "params":[0,"get_accounts",[["1.2.0"]]]}
< {"id":1,"result":[{"id":"1.2.0","annotations":[],"membership_expiration_date":"1969-12-31T23:59:59","registrar":"1.2.0","referrer":"1.2.0","lifetime_referrer":"1.2.0","network_fee_percentage":2000,"lifetime_referrer_fee_percentage":8000,"referrer_rewards_percentage":0,"name":"committee-account","owner":{"weight_threshold":1,"account_auths":[],"key_auths":[],"address_auths":[]},"active":{"weight_threshold":6,"account_auths":[["1.2.5",1],["1.2.6",1],["1.2.7",1],["1.2.8",1],["1.2.9",1],["1.2.10",1],["1.2.11",1],["1.2.12",1],["1.2.13",1],["1.2.14",1]],"key_auths":[],"address_auths":[]},"options":{"memo_key":"GPH1111111111111111111111111111111114T1Anm","voting_account":"1.2.0","num_witness":0,"num_committee":0,"votes":[],"extensions":[]},"statistics":"2.7.0","whitelisting_accounts":[],"blacklisting_accounts":[]}]}

We can do the same thing using an HTTP client such as curl for APIs which do not require login or other session state:

$ curl --data '{"jsonrpc": "2.0", "method": "call", "params": [0, "get_accounts", [["1.2.0"]]], "id": 1}' http://127.0.0.1:8980/
{"id":1,"result":[{"id":"1.2.0","annotations":[],"membership_expiration_date":"1969-12-31T23:59:59","registrar":"1.2.0","referrer":"1.2.0","lifetime_referrer":"1.2.0","network_fee_percentage":2000,"lifetime_referrer_fee_percentage":8000,"referrer_rewards_percentage":0,"name":"committee-account","owner":{"weight_threshold":1,"account_auths":[],"key_auths":[],"address_auths":[]},"active":{"weight_threshold":6,"account_auths":[["1.2.5",1],["1.2.6",1],["1.2.7",1],["1.2.8",1],["1.2.9",1],["1.2.10",1],["1.2.11",1],["1.2.12",1],["1.2.13",1],["1.2.14",1]],"key_auths":[],"address_auths":[]},"options":{"memo_key":"GPH1111111111111111111111111111111114T1Anm","voting_account":"1.2.0","num_witness":0,"num_committee":0,"votes":[],"extensions":[]},"statistics":"2.7.0","whitelisting_accounts":[],"blacklisting_accounts":[]}]}

When using an HTTP client, the API set ID can be replaced by the API set name, E.G.

$ curl --data '{"jsonrpc": "2.0", "method": "call", "params": ["database", "get_accounts", [["1.2.0"]]], "id": 1}' http://127.0.0.1:8980/

The definition of all node APIs is available in the source code files including database_api.hpp and api.hpp. Corresponding documentation can be found in Doxygen:

Wallet API

The cli_wallet program can also be configured to serve all of its commands as APIs, known as wallet API.

Start cli_wallet with RPC connection enabled:

$ ./programs/cli_wallet/cli_wallet --rpc-http-endpoint=127.0.0.1:8093

Access the wallet API using an HTTP client:

$ curl --data '{"jsonrpc": "2.0", "method": "info", "params": [], "id": 1}' http://127.0.0.1:8093/
$ curl --data '{"jsonrpc": "2.0", "method": "get_account", "params": ["1.2.0"], "id": 1}' http://127.0.0.1:8093/

Note: The syntax to access wallet API is a bit different than accessing node API.

Important:

When RPC connection is enabled for cli_wallet, sensitive data E.G. private keys which is accessible via commands will be accessible via RPC too. It is recommended that only open network connection to localhost or trusted addresses E.G. configure a firewall.
When using wallet API, sensitive data E.G. the wallet password and private keys is transmitted as plain text, thus may be vulnerable to network sniffing. It is recommended that only use wallet API with localhost, or in a clean network, and / or use --rpc-tls-endpoint parameter to only serve wallet API via secure connections.

Accessing restrictable node API sets

You can restrict node API sets to particular users by specifying an api-access file in config.ini or by using the --api-access /full/path/to/api-access.json command-line option on node startup. Here is an example api-access file which allows user bytemaster with password supersecret to access four different API sets, while allowing any other user to access the three public API sets necessary to use the node:

{
   "permission_map" :
   [
      [
         "bytemaster",
         {
            "password_hash_b64" : "9e9GF7ooXVb9k4BoSfNIPTelXeGOZ5DrgOYMj94elaY=",
            "password_salt_b64" : "INDdM6iCi/8=",
            "allowed_apis" : ["database_api", "network_broadcast_api", "history_api", "network_node_api"]
         }
      ],
      [
         "*",
         {
            "password_hash_b64" : "*",
            "password_salt_b64" : "*",
            "allowed_apis" : ["database_api", "network_broadcast_api", "history_api"]
         }
      ]
   ]
}

Note: the login API set is always accessible.

Passwords are stored in base64 as salted sha256 hashes. A simple Python script, saltpass.py is avaliable to obtain hash and salt values from a password. A single asterisk "*" may be specified as username or password hash to accept any value.

With the above configuration, here is an example of how to call the add_node API from the network_node API set:

{"id":1, "method":"call", "params":[1,"login",["bytemaster", "supersecret"]]}
{"id":2, "method":"call", "params":[1,"network_node",[]]}
{"id":3, "method":"call", "params":[2,"add_node",["127.0.0.1:9090"]]}

Note, the call to network_node is necessary to obtain the correct API set ID for the network_node API set. It is not guaranteed that the API set ID for the network_node API set will always be 2.

The restricted API sets are accessible via HTTP too using basic access authentication. E.G.

$ curl --data '{"jsonrpc": "2.0", "method": "call", "params": ["network_node", "add_node", ["127.0.0.1:9090"]], "id": 1}' http://bytemaster:[email protected]:8980/

Our doxygen documentation contains the most up-to-date information about APIs for the node and the wallet.

FAQ

Is there a way to generate help with parameter names and method descriptions?

Yes. Documentation of the code base, including APIs, can be generated using Doxygen. Simply run doxygen in this directory.

If both Doxygen and perl are available in your build environment, the command-line wallet's help and gethelp commands will display help generated from the doxygen documentation.

If your command-line wallet's help command displays descriptions without parameter names like signed_transaction transfer(string, string, string, string, string, bool) it means CMake was unable to find Doxygen or perl during configuration. If found, the output should look like this: signed_transaction transfer(string from, string to, string amount, string asset_symbol, string memo, bool broadcast)
Is there a way to allow external program to drive cli_wallet via websocket, JSONRPC, or HTTP?

Yes. External programs may connect to the command-line wallet and make its calls over a websockets API. To do this, run the wallet in server mode, i.e. cli_wallet -H "127.0.0.1:9999" and then have the external program connect to it over the specified port (in this example, port 9999). Please check the "Using Built-In APIs" section for more info.
Is there a way to access methods which require login over HTTP?

Yes. Most of the methods can be accessed by specifying the API name instead of an API ID. If an API is protected by a username and a password, it can be accessed by using basic access authentication. Please check the "Accessing restrictable node API sets" section for more info.

However, HTTP is not really designed for "server push" notifications, and we would have to figure out a way to queue notifications for a polling client. Websockets solves this problem. If you need to access the stateful methods, use Websockets.
What is the meaning of a.b.c numbers?

The first number specifies the space. Space 1 is for protocol objects, 2 is for implementation objects. Protocol space objects can appear on the wire, for example in the binary form of transactions. Implementation space objects cannot appear on the wire and solely exist for implementation purposes, such as optimization or internal bookkeeping.

The second number specifies the type. The type of the object determines what fields it has. For a complete list of type IDs, see GRAPHENE_DEFINE_IDS(protocol, protocol_ids ...) in protocol/types.hpp and GRAPHENE_DEFINE_IDS(chain, implementation_ids ...) in chain/types.hpp.

The third number specifies the instance. The instance of the object is different for each individual object.
The answer to the previous question was really confusing. Can you make it clearer?

All account IDs are of the form 1.2.x. If you were the 9735th account to be registered, your account's ID will be 1.2.9735. Account 0 is special (it's the "committee account", which is controlled by the committee members and has a few abilities and restrictions other accounts do not).

All asset IDs are of the form 1.3.x. If you were the 29th asset to be registered, your asset's ID will be 1.3.29. Asset 0 is special (it's BTS, which is considered the "core asset").

The first and second number together identify the kind of thing you're talking about (1.2 for accounts, 1.3 for assets). The third number identifies the particular thing.
How do I get the network_add_nodes command to work? Why is it so complicated?

You need to follow the instructions in the "Accessing restrictable node API sets" section to allow a username/password access to the network_node API set. Then you need to pass the username/password to the cli_wallet on the command line.

It's set up this way so that the default configuration is secure even if the RPC port is publicly accessible. It's fine if your witness_node allows the general public to query the database or broadcast transactions (in fact, this is how the hosted web UI works). It's less fine if your witness_node allows the general public to control which p2p nodes it's connecting to. Therefore the API to add p2p connections needs to be set up with proper access controls.

License

KREEL Core is under the MIT license. See LICENSE for more information.

Name		Name	Last commit message	Last commit date
Latest commit History 6,198 Commits
.github		.github
CMakeModules		CMakeModules
daemon		daemon
docker		docker
docs @ 6f6ea4e		docs @ 6f6ea4e
kreel		kreel
libraries		libraries
programs		programs
tests		tests
.gitattributes		.gitattributes
.gitignore		.gitignore
.gitmodules		.gitmodules
CMakeLists.txt		CMakeLists.txt
Dockerfile		Dockerfile
Doxyfile		Doxyfile
LICENSE.txt		LICENSE.txt
README-docker.md		README-docker.md
README.md		README.md
docker-compose.yaml		docker-compose.yaml
sonar-project.properties		sonar-project.properties

Provide feedback

Saved searches

Use saved searches to filter your results more quickly

Repository files navigation

KREEL Core

Resources

Getting Started

Installing Node and Command-Line Wallet Software

Running and Stopping Node Software

Using Command-Line Wallet

Support

Using Built-In APIs

Node API

Wallet API

Accessing restrictable node API sets

FAQ

License

About

Releases

Packages

Languages

License

leedex-chain/kreel-core

Folders and files

Latest commit

History

Repository files navigation

KREEL Core

Resources

Getting Started

Installing Node and Command-Line Wallet Software

Running and Stopping Node Software

Using Command-Line Wallet

Support

Using Built-In APIs

Node API

Wallet API

Accessing restrictable node API sets

FAQ

License

About

Resources

License

Stars

Watchers

Forks

Releases

Packages 0

Languages

Packages