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  1. Supporting & Reference Docs
  2. Sidechain Operator Node (SON) Development
  3. Generic Sidechain Docs
  4. Low Level Designs

son-configuration

Previousrefund-btc-mechanismNextson-consensus-communication-and-transaction-signing-on-chain-lld

Last updated 2 years ago

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Purpose

The purpose of this document is to provide the design for the SON configuration.

Scope

This document describes the SON configuration based on the functional specifications excluding the functionality that has been described in the Low Level Design document .

Background

The Bitcoin Sidechain functionality has been implemented in the Peerplays blockchain but it doesn't take into account, the change of SONs. As per the current implementation of Sidechain, a multisig bitcoin wallet will be created on the bitcoin blockchain to hold the bitcoins that have been deposited into the pBTC accounts of the Peerplays users. Every SON will have a bitcoin transaction signing key for this multisig bitcoin wallet and will be required to sign any withdrawal transaction. When a SONs changes, the transaction signing key of the outgoing SON needs to be removed from the multisig bitcoin wallet and the key of the incoming SON needs to be added. The suggested proposal is to make the Sidechain code available as a plugin and assign the responsibility for running the sidechain code to separate nodes called the Sidechain Operating Nodes (SONs).

Process Overview

Described here is the design for configuring the SONs on a node

Context

SONs have to be implemented as a plugin i.e. it shouldn't be mandatory for a node operator to register as an SON. It should be an option that can be chosen at the time of starting/restarting a node. Moreover, there shouldn't be an issue when replaying the chain even if the plugin is disabled. Also, the number of active SONs should be a chain parameter and the witnesses should be able to vote and change it.

son_plugin

son_plugin class should inherit from the graphene::app::plugin class and the methods plugin_set_program_options(), plugin_initialize(), plugin_startup() and plugin_shutdown() can be overridden to initialize the rpc client and to start/stop the bitcoin zmq listener.

son_api

All the APIs related to sidechain should be moved to the son_api class in the graphene::son namespace together with the son_plugin so that it is easy to maintain the project.

Register son_plugin

The SON plugin has to be registered in programs>witness_node>main.cpp using the register_plugin() method of node object if the options contain the string "son-enable" like below:

if(options.count("son-enable"))

node->register_plugin<son::son_plugin>()

This has to be done before calling the initialize_plugins() method of the node object.

Functional Specification - SON Configuration
Wallet Commands for SON