This mod is a [W.I.P] work in progress mod but it already adds:

/pay command - can be used by all players [ex: /pay Dev iron 3] this give the play named Dev 3 iron coins
/coins command - this commands allow admins/op of Lvl 1 to get a players coins and set said coins [ex: /coins get Dev iron] this will give the amount of iron coins i have in my digital bank.
3 different coin types - this mod has three physical coins available [Iron, Gold, Emerald] there is one more type in the works but is more of a donator type coin for those server Owners who want to reward players for voting for the server or something.
adds custom villagers & trades - this mod adds villagers with custom professions and custom trades so that the currency is continuously flowing through out the server.
more soon

you may add this mod to your mod pack all i ask is credit or feedback from you and players please and thank you :)

TO-DO LIST:

Add config for customizability
more trades
add more trades for non-admin stations/professions

yes all good trades are currently locked behind an admin block [ a professon block only available in creative mode] (can be used for server shop area)

coins - curency system [W.I.P]