The Duckbucks mod introduces two economy systems to the game.
Both are commodity backed currencies with a focus on transmutability
(Basically, Money made of ores, that turns into other ores in a balanced way)

The first Currency,

Duckbucks

Duckbucks come in Copper, Iron, Gold and Diamond
Each Duckbuck can be crafted from four of it's respective resource and one paper
(Crafting is shaped, but can be done anywhere in the crafting grid)

With the exception of the Diamond Duckbuck, it is crafted with one Diamond on top of a piece of paper

Every tier can be upgraded or downgraded into the tier next to it, to upgrade simply put four of one kind of duckbucks (except Diamond) together in the crafting grid

To downgrade, simply put one of any Duckbuck (except Copper) in the crafting grid

Duckbucks have their values in each resource listed on them, hold shift to view.
When trading in Duckbucks think of it like the USD, rather than saying you want two quarters you'd say fifty cents.

Same applies with Duckbucks
10 Copper Duckbucks can be listed as 10DB, A Diamond Duckbuck can be listed as 64DB

As for the other Currency,

Ducktokens

Ducktokens come in many niche resources that specialists may prefer trading in.
If you are a redstone engineer, a builder, an enchanter, an archer, or any other kind of specialist in your SMP, Ducktokens will interest you

Ducktokens are designed to allow transmutation between many rare niche items or blocks
They come in the following resources
Amethyst, Flint, Lapiz, Prismarine, Quartz, Redstone

Any Ducktoken can be crafted with eight of it's respective resource surrounding one paper

Ducktokens can also be changed into any other duck token by surrounding a similiar resource to it with Ducktokens

• Amethyst= Calcite
• Flint= Gravel
• Lapis= Cobblestone
• Prismarine= Kelp
• Quarts= Netherrack
• Redstone= Cobbled Deepslate

All Ducktokens and Duckbucks can be put into a stonecutter to be returned to their respective material.

There is also Emerald Ducktokens which are special in that they cannot be crafted out of other Ducktokens and instead must be made with Emeralds and can be transmuted into any other Ducktoken.

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Massive thanks to Mechanical_Superiority, Classpian, and the whole sidequest SMP for the ideas behind this project.

Huge shoutout to JTW789 for the original MCreator Mod (With his permission I revised it into a Java mod for stability and added some features)

Can I use this in a modpack?

ABSOLUTELY!! Let me know what you think and if it works for your smp, I'd love to see people enjoying this mod as much as I do.

Will you backport / update to xyz?

If I can figure it out.. I've only developed on this version so far, but I'm not going to stop so someday it'll definitely happen.

Fabric?

I wish.. I don't know how to develop for Fabric yet, if I have some freetime I'll give it a shot someday though.