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Version 1.0

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Welcome to the official source code repository for Ontology!

Ontology is dedicated to developing a high-performance blockchain infrastructure, which is customizable to different business requirements.

Prerequisites for getting started with development on the Ontology networks are:

  • Mainstream coding and development experience
  • Understanding of your business scenario/requirements
  • No need for previous blockchain engineering experience

The Ontology core tech team, the community, and the ecosystem can all support you in development. MainNet, TestNet, SmartX and a Docker image for Ontology, SmartX, and Ontology Explorer combined make it easy to start.

Ontology makes getting started easier!

The code is currently in Alpha phase of the release life cycle, but is rapidly under development towards Beta. The master code may be unstable, but stable versions can be found under the release page.

We openly welcome developers to Ontology.


  • Scalable lightweight universal smart contract
  • Scalable WASM contract support
  • Crosschain interactive protocol (processing)
  • Multiple encryption algorithm support
  • Highly optimized transaction processing speed
  • P2P link layer encryption (optional module)
  • Multiple consensus algorithm support (VBFT/DBFT/RBFT/SBFT/PoW)
  • Quick block generation time


Build development environment

The requirements to build Ontology are:

  • Golang version 1.9 or later
  • Glide (a third party package management tool)
  • Properly configured Go language environment
  • Golang supported operating system

Get Ontology

Get from release

  • You can download the latest Ontology binary file with ` curl https://dev.ont.io/ontology_install sh `.
  • You can download other versions at release page.

Get from source code

Clone the Ontology repository into the appropriate $GOPATH/src/github.com/ontio directory.

$ git clone https://github.com/ontio/ontology.git


$ go get github.com/ontio/ontology

Fetch the dependent third party packages with glide.

$ cd $GOPATH/src/github.com/ontio/ontology
$ glide install

Build the source code with make.

$ make all

After building the source code sucessfully, you should see two executable programs:

  • ontology: the node program/command line program for node control.
  • tools/sigsvr: (optional) Ontology Signature Server - sigsvr is a RPC server for signing transactions for some special requirements. Detailed docs can be found here.

Run Ontology

You can run Ontology in four different modes:

1) MainNet (./ontology) 2) TestNet (./ontology –networkid 2) 3) Testmode (./ontology –testmode) 4) Docker

E.g. for Windows (64-bit), use command prompt and cd to the dirctory where you installed the Ontology release, then type start ontology-windows-amd64.exe --networkid 2. This will sync to TestNet and you can explore further by the help command ontology-windows-amd64.exe --networkid 2 help.

MainNet sync node

Run ontology directly


then you can connect to Ontology MainNet.

Public test network Polaris sync node (TestNet)

Run ontology directly

	./ontology --networkid 2

Then you can connect to the Ontology TestNet.


Create a directory on the host and store the following files in the directory:

  • Node program ontology
  • Wallet file wallet.dat (wallet.dat can be generated by ./ontology account add -d)

Run command $ ./ontology --testmode can start single-host testnet.

Here’s a example of a single-host configuration:

  • Directory structure

      $ tree
      └── ontology
          ├── ontology
          └── wallet.dat

Run in docker

Please ensure there is a docker environment in your machine.

  1. Make docker image

    • In the root directory of source code, run make docker, it will make an Ontology image in docker.
  2. Run Ontology image

    • Use command docker run ontio/ontology to run Ontology;

    • If you need to allow interactive keyboard input while the image is running, you can use the docker run -ti ontio/ontology command to start the image;

    • If you need to keep the data generated by image at runtime, you can refer to the data persistence function of docker (e.g. volume);

    • If you need to add Ontology parameters, you can add them directly after docker run ontio/ontology such as docker run ontio/ontology --networkid 2. The parameters of ontology command line refer to here.

Some examples

ONT transfer sample

– from: transfer from; – to: transfer to; – amount: ONT amount;

 ./ontology asset transfer  --from=ARVVxBPGySL56CvSSWfjRVVyZYpNZ7zp48 --to=AaCe8nVkMRABnp5YgEjYZ9E5KYCxks2uce --amount=10

If the asset transfer is successful, the result will display as follows:

Transfer ONT

TxHash is the transfer transaction hash, and we can query a transfer result by the TxHash. Due to block time, the transfer transaction will not be executed before the block is generated and added.

If you want to transfer ONG, just add –asset=ong flag.

Note that ONT is an integer and has no decimals, whereas ONG has 9 decimals. For detailed info please read Everything you need to know about ONG.

./ontology asset transfer --from=ARVVxBPGySL56CvSSWfjRVVyZYpNZ7zp48 --to=ARVVxBPGySL56CvSSWfjRVVyZYpNZ7zp48 --amount=95.479777254 --asset=ong

If transfer of the asset succeeds, the result will display as follows:

Transfer ONG

Please note, when you use the address of an account, you can use the index or label of the account instead. Index is the sequence number of a particular account in the wallet. The index starts from 1, and the label is the unique alias of an account in the wallet.

./ontology asset transfer --from=1 --to=2 --amount=10

Query transfer status sample

./ontology info status <TxHash>

For Example:

./ontology info status 10dede8b57ce0b272b4d51ab282aaf0988a4005e980d25bd49685005cc76ba7f


Transaction:transfer success

Query account balance sample

./ontology asset balance <address|index|label>

For Example:

./ontology asset balance ARVVxBPGySL56CvSSWfjRVVyZYpNZ7zp48


./ontology asset balance 1



For further examples, please refer to the CLI User Guide.


Please open a pull request with a signed commit. We appreciate your help! You can also send your code as email to the developer mailing list. You’re welcome to join the Ontology mailing list or developer forum.

Please provide a detailed submission information when you want to contribute code for this project. The format is as follows:

Header line: Explain the commit in one line (use the imperative).

Body of commit message is a few lines of text, explaining things in more detail, possibly giving some background about the issue being fixed, etc.

The body of the commit message can be several paragraphs. Please do proper word-wrap and keep columns shorter than 74 characters or so. That way “git log” will show things nicely even when it is indented.

Make sure you explain your solution and why you are doing what you are doing, as opposed to describing what you are doing. Reviewers and your future self can read the patch, but might not understand why a particular solution was implemented.

Reported-by: whoever-reported-it + Signed-off-by: Your Name youremail@yourhost.com

Open source community


Developer Discord Group


The Ontology library is licensed under the GNU Lesser General Public License v3.0, read the LICENSE file in the root directory of the project for details.