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LDK Java Bindings and Release Binaries
There is a newer version: 0.0.124.0
package org.ldk.structs;

import org.ldk.impl.bindings;
import org.ldk.enums.*;
import org.ldk.util.*;
import java.util.Arrays;
import java.lang.ref.Reference;
import javax.annotation.Nullable;


/**
 * Fallback address in case no LN payment is possible
 */
@SuppressWarnings("unchecked") // We correctly assign various generic arrays
public class Fallback extends CommonBase {
	private Fallback(Object _dummy, long ptr) { super(ptr); }
	@Override @SuppressWarnings("deprecation")
	protected void finalize() throws Throwable {
		super.finalize();
		if (ptr != 0) { bindings.Fallback_free(ptr); }
	}
	static Fallback constr_from_ptr(long ptr) {
		bindings.LDKFallback raw_val = bindings.LDKFallback_ref_from_ptr(ptr);
		if (raw_val.getClass() == bindings.LDKFallback.SegWitProgram.class) {
			return new SegWitProgram(ptr, (bindings.LDKFallback.SegWitProgram)raw_val);
		}
		if (raw_val.getClass() == bindings.LDKFallback.PubKeyHash.class) {
			return new PubKeyHash(ptr, (bindings.LDKFallback.PubKeyHash)raw_val);
		}
		if (raw_val.getClass() == bindings.LDKFallback.ScriptHash.class) {
			return new ScriptHash(ptr, (bindings.LDKFallback.ScriptHash)raw_val);
		}
		assert false; return null; // Unreachable without extending the (internal) bindings interface
	}

	public final static class SegWitProgram extends Fallback {
		public final org.ldk.util.WitnessVersion version;
		public final byte[] program;
		private SegWitProgram(long ptr, bindings.LDKFallback.SegWitProgram obj) {
			super(null, ptr);
			byte version = obj.version;
			WitnessVersion version_conv = new WitnessVersion(version);
			this.version = version_conv;
			this.program = obj.program;
		}
	}
	public final static class PubKeyHash extends Fallback {
		public final byte[] pub_key_hash;
		private PubKeyHash(long ptr, bindings.LDKFallback.PubKeyHash obj) {
			super(null, ptr);
			this.pub_key_hash = obj.pub_key_hash;
		}
	}
	public final static class ScriptHash extends Fallback {
		public final byte[] script_hash;
		private ScriptHash(long ptr, bindings.LDKFallback.ScriptHash obj) {
			super(null, ptr);
			this.script_hash = obj.script_hash;
		}
	}
	long clone_ptr() {
		long ret = bindings.Fallback_clone_ptr(this.ptr);
		Reference.reachabilityFence(this);
		return ret;
	}

	/**
	 * Creates a copy of the Fallback
	 */
	public Fallback clone() {
		long ret = bindings.Fallback_clone(this.ptr);
		Reference.reachabilityFence(this);
		if (ret >= 0 && ret <= 4096) { return null; }
		org.ldk.structs.Fallback ret_hu_conv = org.ldk.structs.Fallback.constr_from_ptr(ret);
		if (ret_hu_conv != null) { ret_hu_conv.ptrs_to.add(this); };
		return ret_hu_conv;
	}

	/**
	 * Utility method to constructs a new SegWitProgram-variant Fallback
	 */
	public static Fallback seg_wit_program(org.ldk.util.WitnessVersion version, byte[] program) {
		long ret = bindings.Fallback_seg_wit_program(version.getVal(), program);
		Reference.reachabilityFence(version);
		Reference.reachabilityFence(program);
		if (ret >= 0 && ret <= 4096) { return null; }
		org.ldk.structs.Fallback ret_hu_conv = org.ldk.structs.Fallback.constr_from_ptr(ret);
		if (ret_hu_conv != null) { ret_hu_conv.ptrs_to.add(ret_hu_conv); };
		return ret_hu_conv;
	}

	/**
	 * Utility method to constructs a new PubKeyHash-variant Fallback
	 */
	public static Fallback pub_key_hash(byte[] a) {
		long ret = bindings.Fallback_pub_key_hash(InternalUtils.check_arr_len(a, 20));
		Reference.reachabilityFence(a);
		if (ret >= 0 && ret <= 4096) { return null; }
		org.ldk.structs.Fallback ret_hu_conv = org.ldk.structs.Fallback.constr_from_ptr(ret);
		if (ret_hu_conv != null) { ret_hu_conv.ptrs_to.add(ret_hu_conv); };
		return ret_hu_conv;
	}

	/**
	 * Utility method to constructs a new ScriptHash-variant Fallback
	 */
	public static Fallback script_hash(byte[] a) {
		long ret = bindings.Fallback_script_hash(InternalUtils.check_arr_len(a, 20));
		Reference.reachabilityFence(a);
		if (ret >= 0 && ret <= 4096) { return null; }
		org.ldk.structs.Fallback ret_hu_conv = org.ldk.structs.Fallback.constr_from_ptr(ret);
		if (ret_hu_conv != null) { ret_hu_conv.ptrs_to.add(ret_hu_conv); };
		return ret_hu_conv;
	}

	/**
	 * Generates a non-cryptographic 64-bit hash of the Fallback.
	 */
	public long hash() {
		long ret = bindings.Fallback_hash(this.ptr);
		Reference.reachabilityFence(this);
		return ret;
	}

	@Override public int hashCode() {
		return (int)this.hash();
	}
	/**
	 * Checks if two Fallbacks contain equal inner contents.
	 * This ignores pointers and is_owned flags and looks at the values in fields.
	 */
	public boolean eq(org.ldk.structs.Fallback b) {
		boolean ret = bindings.Fallback_eq(this.ptr, b == null ? 0 : b.ptr);
		Reference.reachabilityFence(this);
		Reference.reachabilityFence(b);
		return ret;
	}

	@Override public boolean equals(Object o) {
		if (!(o instanceof Fallback)) return false;
		return this.eq((Fallback)o);
	}
}