With "RepairByItem" you are able to repair your tools and armor on an iron block by right clicking.
When you are repairing your stuff, you are paying using the base item of the tool (diamond for diamond tools, iron for iron tools and so on).
The plugin is extremely simple and lightweight yet powerful.
This plugin requires no commands, no permissions and have no dependencies.
Just place an iron block and you are ready to go. Then if you want to repair your diamond pickaxe for an example:
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This plugin has been created by ProWebster. Please PM me if you've got any questions. Thx in advance.