Adera One Smart Chain

Adera One is committed to product development and service improvement, and contributes its share to the infrastructure of the blockchain world. AOS is a small part of the development prospect.

Adera One Smart Chain (AOS) is a smart contract chain that supports up to 101 validators. Aside from shorter time for block generation and lower fees for transactions, AOS is also fully compatible with Ethereum virtual machine(EVM) and protocols while supporting high-performance transactions. And to achieve that, the easiest solution is to develop based on go-ethereum fork, as we respect the great work of Ethereum very much.

AOS Features

• Decentralization: Permission-free, anyone can become a validator by staking ADR.
• EVM compatibility: Fully compatible with Ethereum virtual machine(EVM), which means that almost all DApps, ecosystem components and tools on Ethereum can be migrated to AOS directly or with very small changes.
• High performance: 600+ TPS, 3s block time

Native Token

ADR on AOS runs the same way as ETH runs on Ethereum, and its main functions are:

• As block reward for validators
• To pay for the gas for transfers and contract calls on AOS
• To pay for the transaction fees for deploying smart contracts on AOS
• To be delegated to the selected validators

Building the source

For prerequisites and detailed build instructions please read the Compile.

Building sprd requires both a Go (version 1.13 or later) and a C compiler. You can install them using your favourite package manager. Once the dependencies are installed, run

make sprd

Running sprd

Going through all the possible command line flags is out of scope here (please consult our CLI), but we've enumerated a few common parameter combos to get you up to speed quickly on how you can run your own sprd instance.

Hardware Requirements

• 1T of SSD storage for mainnet, 500G of SSD storage for testnet.
• 16 cores of CPU and 32 gigabytes of memory (RAM) for mainnet.
• 4 cores of CPU and 8 gigabytes of memory (RAM) for testnet.
• A broadband Internet connection with upload/download speeds of at least 10 megabyte per second

Full node on the testnet

By far the most common scenario is people wanting to simply interact with the AOS network: create accounts; transfer funds; deploy and interact with contracts. For this particular use-case the user doesn't care about years-old historical data, so we can fast-sync quickly to the current state of the network. To do so:

$ sprd console

This command will:

• Start sprd in fast sync mode (default, can be changed with the --syncmode flag), causing it to download more data in exchange for avoiding processing the entire history of the Ethereum network, which is very CPU intensive.
• Start up sprd's built-in interactive JavaScript console, (via the trailing console subcommand) through which you can invoke all official web3 methods as well as sprd's own management APIs. This tool is optional and if you leave it out you can always attach to an already running sprd instance with sprd attach.

Configuration

As an alternative to passing the numerous flags to the sprd binary, you can also pass a configuration file via:

$ sprd --config /path/to/your_config.toml

Programmatically interfacing sprd nodes

As a developer, sooner rather than later you'll want to start interacting with sprd and the AOS network via your own programs and not manually through the console. To aid this, sprd has built-in support for a JSON-RPC based APIs (standard APIs and specific APIs). These can be exposed via HTTP, WebSockets and IPC (UNIX sockets on UNIX based platforms, and named pipes on Windows).

The IPC interface is enabled by default and exposes all the APIs supported by sprd, whereas the HTTP and WS interfaces need to manually be enabled and only expose a subset of APIs due to security reasons. These can be turned on/off and configured as you'd expect.

HTTP based JSON-RPC API options:

• --http Enable the HTTP-RPC server
• --http.addr HTTP-RPC server listening interface (default: localhost)
• --http.port HTTP-RPC server listening port (default: 8545)
• --http.api API's offered over the HTTP-RPC interface (default: eth,net,web3)
• --http.corsdomain Comma separated list of domains from which to accept cross origin requests (browser enforced)
• --ws Enable the WS-RPC server
• --ws.addr WS-RPC server listening interface (default: localhost)
• --ws.port WS-RPC server listening port (default: 8546)
• --ws.api API's offered over the WS-RPC interface (default: eth,net,web3)
• --ws.origins Origins from which to accept websockets requests
• --ipcdisable Disable the IPC-RPC server
• --ipcapi API's offered over the IPC-RPC interface (default: admin,debug,eth,miner,net,personal,shh,txpool,web3)
• --ipcpath Filename for IPC socket/pipe within the datadir (explicit paths escape it)

You'll need to use your own programming environments' capabilities (libraries, tools, etc) to connect via HTTP, WS or IPC to a sprd node configured with the above flags and you'll need to speak JSON-RPC on all transports. You can reuse the same connection for multiple requests!

Note: Please understand the security implications of opening up an HTTP/WS based transport before doing so! Hackers on the internet are actively trying to subvert AOS nodes with exposed APIs! Further, all browser tabs can access locally running web servers, so malicious web pages could try to subvert locally available APIs!

Contribution

Thank you for considering to help out with the source code! We welcome contributions from anyone on the internet, and are grateful for even the smallest of fixes!

If you'd like to contribute to AOS, please fork, fix, commit and send a pull request for the maintainers to review and merge into the main code base. If you wish to submit more complex changes though, please contact to the core developer to ensure those changes are in line with the general philosophy of the project and/or get some early feedback which can make both your efforts much lighter as well as our review and merge procedures quick and simple.

Please make sure your contributions adhere to our coding guidelines:

• Code must adhere to the official Go formatting guidelines (i.e. uses gofmt).
• Code must be documented adhering to the official Go commentary guidelines.
• Pull requests need to be based on and opened against the master branch.
• Commit messages should be prefixed with the package(s) they modify.
  • E.g. "eth, rpc: make trace configs optional"

Please see the Developers' Guide for more details on configuring your environment, managing project dependencies, and testing procedures.

License

The AOS library (i.e. all code outside of the cmd directory) is licensed under the GNU Lesser General Public License v3.0, also included in our repository in the COPYING.LESSER file.

The AOS binaries (i.e. all code inside of the cmd directory) is licensed under the GNU General Public License v3.0, also included in our repository in the COPYING file.