# Functions

GetInstance returns the instance of RPC.

# Constants

ContentType is a content-type for JSON-RPC.
Mainnet is a const string indicates mainnet.
Testnet is a const string indicates testnet.

# Variables

MainnetUrls is a URL list for mainnet.
NetType is either mainnet or testnet.
TestnetUrls is a URL list for testnet.

# Structs

RPC is a JSON-RPC manager through HTTP.