Viper Economy

Evidence

Ran on Kiln's test stand (2026-11-04): ViperEconomy did not start: java.lang.NoClassDefFoundError: net/minecraft/world/Container.

What it needs from Kiln

• Mixin
• net.fabricmc.fabric.api.command.v2.CommandRegistrationCallback
• net.fabricmc.fabric.api.event.lifecycle.v1.ServerLifecycleEvents
• net.fabricmc.fabric.api.event.lifecycle.v1.ServerLifecycleEvents.ServerStopping
• net.fabricmc.fabric.api.networking.v1.ServerPlayConnectionEvents
• net.fabricmc.fabric.api.networking.v1.ServerPlayConnectionEvents.Join
• net.minecraft.commands.CommandSourceStack
• net.minecraft.commands.Commands
• net.minecraft.commands.Commands.CommandSelection
• net.minecraft.commands.arguments.EntityArgument
• net.minecraft.core.component.DataComponentType
• net.minecraft.core.component.DataComponents
• net.minecraft.server.MinecraftServer
• net.minecraft.server.network.ServerGamePacketListenerImpl
• net.minecraft.server.permissions.LevelBasedPermissionSet
• net.minecraft.server.permissions.PermissionLevel
• net.minecraft.server.permissions.PermissionSet
• net.minecraft.server.players.PlayerList
• net.minecraft.world.Container
• net.minecraft.world.MenuProvider
• net.minecraft.world.SimpleContainer
• net.minecraft.world.SimpleMenuProvider
• net.minecraft.world.entity.item.ItemEntity
• net.minecraft.world.entity.player.Inventory
• net.minecraft.world.inventory.AbstractContainerMenu
• net.minecraft.world.inventory.ContainerInput
• net.minecraft.world.inventory.MenuType
• net.minecraft.world.inventory.Slot
• net.minecraft.world.item.component.ItemLore
• net.minecraft.world.item.component.ResolvableProfile
• net.minecraft.world.level.block.ChestBlock
• net.minecraft.world.level.block.ColorCollection
• net.minecraft.world.level.block.WallSignBlock
• net.minecraft.world.level.block.entity.ChestBlockEntity
• net.minecraft.world.level.block.entity.SignBlockEntity
• net.minecraft.world.level.block.entity.SignText
• net.minecraft.world.level.block.entity.SignText.Mutable
• net.minecraft.world.level.block.entity.SignTextSlot
• net.minecraft.world.phys.HitResult.Type
• DefaultedRegistry.iterator()
• ServerLevel.addFreshEntity()
• and 17 more

On the roadmap: Code next to data (0.3), Machines (0.4), Mixin (0.5)

In the author's words

A server-side Fabric economy mod featuring dynamic virtual or physical currency toggles, multi-database drivers, cross-server Redis syncing, and custom-category interactive /servershop container GUIs with zero client-side requirements.

Scan

Scanned on 4 November 2026 against Kiln 0.2.0, file viper-economy-1.0.0.jar. The scan reads the mod's classes; it does not run them.