you can install the npm module here
npm install chain-unofficial
Standard convention is described fully in the types.json file in the link above.
simply require the npm module at the top of the file
var chain = ;
you may specify the options you wish to make a call like so:
var chainClient =;//example callchainClientAddresses;
alternatively you can check out the comments above each function in lib if you wish to understand what each function expects and returns.