Achain is a new blockchain based on BTS1.0 which integrates lua virtual machine based smart contracts, yet a software platform designed to help coordinate voluntary free market operations amongst a set of social actors.

These social actors together maintain a replicated deterministic state machine which defines the state of a free market. This state machine unambigiously defines the ownership of resources amongst market participants, the rules by which resources are reallocated through market operations, and the history of all market operations. Social actors are free to voluntarily enter and exit the market as desired.

Replicas of the state machine are kept consistent using the Result Delegated Proof-of-Stake distributed consensus protocol, which depends on market operations by a special class of market participants colloquially known as shareholders. Resource ownership is secured using digital signatures and inputs to the state machine are shared amongst actors using a peer-to-peer mesh network.

For more information about Achain, please read  following document:

• Technique White Paper
• Business White Paper.

Different platforms have different build instructions:

• Windows
• Ubuntu (Todo)

For many applications, it is useful to execute Achain commands from scripts. The Achain client includes RPC server functionality to allow programs to submit JSON-formatted commands and retrieve JSON-formatted results over an HTTP connection. To enable the RPC server, you can edit the rpc section of config.json as follows:

  "rpc": {
    "enable": true,
    "rpc_user": "USERNAME",
    "rpc_password": "PASSWORD",
    "rpc_endpoint": "127.0.0.1:1775",
    "httpd_endpoint": "127.0.0.1:1776",

Here, USERNAME and PASSWORD are authentication credentials which must be presented by a client to gain access to the RPC interface. These parameters may also be specified on the command line, but this is not recommended because some popular multi-user operating systems (Linux in particular) allow command line parameters of running programs to be visible to all users.

After editing the configuration file and (re)starting the Achain client, you can use any HTTP client to POST a JSON object and read the JSON response. Here is an example using the popular curl command line HTTP client:

curl --user USERNAME:PASSWORD http:https://127.0.0.1:1776/rpc -X POST -H 'Content-Type: application/json' -d '{"method" : "blockchain_get_account", "params" : ["dev0.theoretical"], "id" : 1}'

The POST request returns a JSON result like this (some data elided for brevity):

{"id":1,"result":{"id":31427,"name":"dev0.theoretical","public_data":{"version":"v0.4.27.1"},"owner_key":"BTS75vj8aaDWFwg7Wd6WinAAqVddUcSRJ1hSMDNayLAbCuxsmoQTf", ...},"meta_data":{"type":"public_account","data":""}}}

Since HTTP basic authentication is used, the authentication credentials are sent over the socket in unencrypted plaintext. For this reason, binding to an interface other than localhost in the configuration file is not recommended. If you wish to access the RPC interface from a remote system, you should establish a secure connection using SSH port forwarding (the -L option in OpenSSH) or a reverse proxy SSL/TLS tunnel (typically supported by general-purpose webservers such as nginx).

Please keep in mind that anyone able to connect to the RPC socket with the correct username and password will be able to access all funds, accounts and private keys in any open wallet (including wallets opened manually or by another RPC client connected to the same Achain_client instance). Thus, your security procedures should protect the username, password, and socket accordingly (including config.json since it contains the username and password)!

The source code can always be found at the Achain GitHub Repository. There are four main branches:

• master - official Achain releases are tagged from here; this should only change for a new release
• Achain - updates to Achain are staged here in preparation for the next official release
• develop - all new development happens here; this is what is used for internal Achain test networks
• toolkit - this is the most recent common ancestor between master and develop; forks of Achain should base from here

Some technical documentation is available at the Achain GitHub Wiki.

Bugs can be reported directly to the Achain Issue Tracker.

Technical support can be obtained from the AchainTalk Technical Support Forum.

The Achain project is licensed under the MIT license.