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Problems with Capabilities


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First of all, I am unable to subscribe to AttachCapabilitiesEvent. In theory, it should be as simple as follows:

public class CapabilityEvents {
    public void playerCapability(final AttachCapabilitiesEvent<Entity> event){
        Soul.LOGGER.info("attach capabilities");
        if (event.getObject() instanceof PlayerEntity) {
            event.addCapability(new ResourceLocation("soul", "soul"), new SoulProvider());

, but it does not get called. Secondly, I cant really understand what CapabilityProvider is, where it is used and what I should return in method implementation. From different sources in the internet Ive made the following class:

public class SoulProvider implements ICapabilityProvider {
    public static Capability<ISoul> SOUL_CAP = null;
    private LazyOptional<ISoul> instance = LazyOptional.of(() -> new DefaultSoul());

    public <T> LazyOptional<T> getCapability(@Nonnull Capability<T> cap, @Nullable Direction side) {
        return cap == SOUL_CAP ? instance.cast() : LazyOptional.empty();

    public <T> LazyOptional<T> getCapability(@Nonnull Capability<T> cap) {
        return cap == SOUL_CAP ? instance.cast() : LazyOptional.empty();

, but it looks like a total nonsense. Forge documentation is a cruel joke and doesnt contain any useful info/examples...

Edited by GrigLog
SOUL_CAP::getDefaultInstance was not working, you have to specify the default implementation here
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