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DNA is a decentralized distributed network protocol based on blockchain technology and is implemented in Golang. Through peer-to-peer network, DNA can be used to digitize assets and provide financial service, including asset registration, issuance, transfer, etc.

• Scalable Lightweight Universal Smart Contract
• Crosschain Interactive Protocol
• Quantum-Resistant Cryptography (optional module)
• China National Crypto Standard (optional module)
• High Optimization of TPS
• P2P Link Layer Encryption
• Node Access Control
• Multiple Consensus Algorithm Support (DBFT/VBFT)
• Configurable Block Generation Time
• Configurable Digital Currency Incentive
• Configable Sharding Consensus (in progress)

The requirements to build DNA are:

• Go version 1.12.5 or later
• Properly configured Go environment

Clone the DNA repository into the appropriate $GOPATH/src/DNAProject directory.

$ git clone https://github.com/DNAProject/DNA.git

Build the source code with make.

$ make

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

• dnaNode: the node program

Follow the procedures in Deployment section to give them a shot!

To run DNA successfully, at least 4 nodes are required. The four nodes can be deployed in the following two way:

• multi-hosts deployment
• testmode deployment

We can do a quick multi-host deployment by modifying the default configuration file config.json. Change the IP address in SeedList section to the seed node's IP address, and then copy the changed file to the hosts that you will run on. On each host, put the executable program dnaNode and the configuration file config.json into the same directory. Like :

$ ls
config.json dnaNode

Each node also needs a wallet.dat to run. The quickest way to generate wallets is to run ./dnaNode account add -d on each host.Then, change the peerPubkey and address field to the 4 nodes' wallet public keys, which you can get from the last command's echo. The public key sequence does not matter. Now all configurations are completed.

Here's an snippet for configuration, note that 10.0.1.100 and 10.0.1.101 are public seed node's addresses:

$ cat config.json
{
  "SeedList": [
    "10.0.1.100:20338",
    "10.0.1.101:20338",
    "10.0.1.102:20338",
    "10.0.1.103:20338"
  ],
  "ConsensusType":"vbft",
  "VBFT":{
    "n":40,
    "c":1,
    "k":4,
    "l":64,
    "block_msg_delay":10000,
    "hash_msg_delay":10000,
    "peer_handshake_timeout":10,
    "max_block_change_view":3000,
    "admin_ont_id":"did:dna:AMAx993nE6NEqZjwBssUfopxnnvTdob9ij",
    "min_init_stake":10000,
    "vrf_value":"1c9810aa9822e511d5804a9c4db9dd08497c31087b0daafa34d768a3253441fa20515e2f30f81741102af0ca3cefc4818fef16adb825fbaa8cad78647f3afb590e",
    "vrf_proof":"c57741f934042cb8d8b087b44b161db56fc3ffd4ffb675d36cd09f83935be853d8729f3f5298d12d6fd28d45dde515a4b9d7f67682d182ba5118abf451ff1988",
    "peers":[
      {
        "index":1,
        "peerPubkey":"0289ebcf708798cd4c2570385e1371ba10bdc91e4800fa5b98a9b276eab9300f10",
        "address":"ANT97HNwurK2LE2LEiU72MsSD684nPyJMX",
        "initPos":10000
      },
      {
        "index":2,
        "peerPubkey":"039dc5f67a4e1b3e4fc907ed430fd3958d8b6690f4f298b5e041697bd5be77f3e8",
        "address":"AMLU5evr9EeW8G1WaZT1n1HDBxaq5GczeC",
        "initPos":10000
      },
      {
        "index":3,
        "peerPubkey":"0369f4005b006166e988af436860b8a06c15f3eb272ccbabff175e067e6bba88d7",
        "address":"AbSAwqHQmNMoUT8ps8N16HciYtgprbNozF",
        "initPos":10000
      },
      {
        "index":4,
        "peerPubkey":"035998e70d829eea58998ec743113cf778f66932a063efc1a0a0496717c4a0d93d",
        "address":"AemhQtcPTGegSk1UAsiLnePVcut1MLXSPg",
        "initPos":10000
      }
    ]
  }
}

If you like to run in test mode, there's no configuration needed. With the following command, you can start DNA in test mode.

$ ./dnaNode --testmode
$ - input your wallet password

Start the seed node program first and then other nodes. Just run:

$ ./dnaNode
$ - input your wallet password

Run ./dnaNode --help for more details.

Can I contribute patches to DNA project?

Yes! Please open a pull request with signed-off commits. We appreciate your help!

You can also send your patches as emails to the developer mailing list. Please join the DNA mailing list or forum and talk to us about it.

Either way, if you don't sign off your patches, we will not accept them. This means adding a line that says "Signed-off-by: Name " at the end of each commit, indicating that you wrote the code and have the right to pass it on as an open source patch.

Also, please write good git commit messages. A good commit message looks like this:

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 etc.

The body of the commit message can be several paragraphs, and
please do proper word-wrap and keep columns shorter than about
74 characters or so. That way "git log" will show things
nicely even when it's indented.

Make sure you explain your solution and why you're doing what you're
doing, as opposed to describing what you're 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 <[email protected]>

DNA blockchain is licensed under the LGPL License, Version 3.0. See LICENSE for the full license text.