java.lang.Object
- org.ldk.structs.KeysManager

```
public class KeysManager
extends Object
```
Simple [`KeysInterface`] implementation that takes a 32-byte seed for use as a BIP 32 extended key and derives keys from that. Your `node_id` is seed/0'. Unilateral closes may use seed/1'. Cooperative closes may use seed/2'. The two close keys may be needed to claim on-chain funds! This struct cannot be used for nodes that wish to support receiving phantom payments; [`PhantomKeysManager`] must be used instead. Note that switching between this struct and [`PhantomKeysManager`] will invalidate any previously issued invoices and attempts to pay previous invoices will fail.

Method Summary

All Methods Static Methods Instance Methods Concrete Methods
Modifier and Type	Method	Description
`KeysInterface`	`as_KeysInterface()`	Constructs a new KeysInterface which calls the relevant methods on this_arg.
`InMemorySigner`	`derive_channel_keys(long channel_value_satoshis, byte[] params)`	Derive an old [`Sign`] containing per-channel secrets based on a key derivation parameters.
`protected void`	`finalize()`
`static KeysManager`	`of(byte[] seed, long starting_time_secs, int starting_time_nanos)`	Constructs a [`KeysManager`] from a 32-byte seed.
`Result_TransactionNoneZ`	`spend_spendable_outputs(SpendableOutputDescriptor[] descriptors, TxOut[] outputs, byte[] change_destination_script, int feerate_sat_per_1000_weight)`	Creates a [`Transaction`] which spends the given descriptors to the given outputs, plus an output to the given change destination (if sufficient change value remains).

Methods inherited from class java.lang.Object
clone, equals, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

- Method Detail
  - finalize
```
protected void finalize()
                 throws Throwable
```
    Overrides:
    
    finalize in class Object
    
    Throws:
    
    Throwable
  - of
```
public static KeysManager of(byte[] seed,
                             long starting_time_secs,
                             int starting_time_nanos)
```
    Constructs a [`KeysManager`] from a 32-byte seed. If the seed is in some way biased (e.g., your CSRNG is busted) this may panic (but more importantly, you will possibly lose funds). `starting_time` isn't strictly required to actually be a time, but it must absolutely, without a doubt, be unique to this instance. ie if you start multiple times with the same `seed`, `starting_time` must be unique to each run. Thus, the easiest way to achieve this is to simply use the current time (with very high precision). The `seed` MUST be backed up safely prior to use so that the keys can be re-created, however, obviously, `starting_time` should be unique every time you reload the library - it is only used to generate new ephemeral key data (which will be stored by the individual channel if necessary). Note that the seed is required to recover certain on-chain funds independent of [`ChannelMonitor`] data, though a current copy of [`ChannelMonitor`] data is also required for any channel, and some on-chain during-closing funds. [`ChannelMonitor`]: crate::chain::channelmonitor::ChannelMonitor
  - derive_channel_keys
```
public InMemorySigner derive_channel_keys(long channel_value_satoshis,
                                          byte[] params)
```
    Derive an old [`Sign`] containing per-channel secrets based on a key derivation parameters.
  - spend_spendable_outputs
```
public Result_TransactionNoneZ spend_spendable_outputs(SpendableOutputDescriptor[] descriptors,
                                                       TxOut[] outputs,
                                                       byte[] change_destination_script,
                                                       int feerate_sat_per_1000_weight)
```
    Creates a [`Transaction`] which spends the given descriptors to the given outputs, plus an output to the given change destination (if sufficient change value remains). The transaction will have a feerate, at least, of the given value. Returns `Err(())` if the output value is greater than the input value minus required fee, if a descriptor was duplicated, or if an output descriptor `script_pubkey` does not match the one we can spend. We do not enforce that outputs meet the dust limit or that any output scripts are standard. May panic if the [`SpendableOutputDescriptor`]s were not generated by channels which used this [`KeysManager`] or one of the [`InMemorySigner`] created by this [`KeysManager`].
  - as_KeysInterface
```
public KeysInterface as_KeysInterface()
```
    Constructs a new KeysInterface which calls the relevant methods on this_arg. This copies the `inner` pointer in this_arg and thus the returned KeysInterface must be freed before this_arg is

Class KeysManager

Method Summary

Methods inherited from class java.lang.Object

Method Detail

finalize

of

derive_channel_keys

spend_spendable_outputs

as_KeysInterface