palladum-lightning/doc/developers-guide/deprecated-features.md

---
title: Deprecated Features
slug: deprecated-features
content:
  excerpt: Deprecated features and timeline for old feature removals.
privacy:
  view: public
---

| Name                                               | Type               | First Deprecated | Last Supported | Description                                                                                                               |
|----------------------------------------------------|--------------------|------------------|----------------|---------------------------------------------------------------------------------------------------------------------------|
| listpeers.features.option_anchors_zero_fee_htlc_tx | Field              | v24.08           | v25.09         | Renamed to `option_anchors` in the spec: check for that in `features` instead                                             |
| decodepay                                          | Command            | v24.11           | v25.12         | Use `decode` which is more powerful (since v23.05)                                                                        |
| close.tx                                           | Field              | v24.11           | v25.12         | Use txs array instead                                                                                                     |
| close.txid                                         | Field              | v24.11           | v25.12         | Use txids array instead                                                                                                   |
| xpay.ignore_bolt12_mpp                             | Field              | v25.05           | v25.12         | Try MPP even if the BOLT12 invoice doesn't explicitly allow it (CLN didn't until 25.02)                                   |
| listpeerchannels.max_total_htlc_in_msat            | Field              | v25.02           | v26.03         | Use our_max_total_htlc_out_msat                                                                                           |
| wait.details                                       | Field              | v25.05           | v26.06         | Use subsystem-specific object instead                                                                                     |
| channel_state_changed.old_state.unknown            | Notification Field | v25.05           | v26.03         | Value "unknown" is deprecated: field will be omitted instead                                                              |
| coin_movement.tags                                 | Notification Field | v25.09           | v26.09         | Use `primary_tag` (first tag) and `extra_tags` instead                                                                    |
| coin_movement.utxo_txid                            | Notification Field | v25.09           | v26.09         | Use `utxo` instead of `utxo_txid` & `vout`                                                                                |
| coin_movement.txid                                 | Notification Field | v25.09           | v26.09         | Use `spending_txid` instead                                                                                               |
| channel_state_changed.null_scid                    | Notification Field | v25.09           | v26.09         | In channel_state_changed notification, `short_channel_id` will be missing instead of `null`                               |
| notification.payload                               | Notification Field | v25.09           | v26.09         | Notifications from plugins used to have fields in `payload` sub-object, now they are not (just like normal notifications) |
| pay_notifications.raw_fields                       | Field              | v25.09           | v26.09         | `channel_hint_update`, `pay_failure` and `pay_success` notifications now wrap members in an object of the same name       |
| encrypted_hsm                                      | Config             | v25.12           | v26.12         | `hsm-passphrase` is a name which also makes sense for modern hsm_secrets which use BIP 39                                 |
| newaddr.addresstype.defaultbech32                  | Parameter          | v25.12           | v26.12         | Use `p2tr` in the response (present since v23.08 if `addresstype` is `p2tr`,  and always present since v24.12).           |

Inevitably there are features which need to change: either to be generalized, or removed when they can no longer be supported.

Types of deprecation:
* Command: an entire command is removed.  Usually replaced by a more generic or better-named one.
* Config: a commandline/configuration option is removed.  Usually made the default, or replaced by generalized or better-named.
* Field(s): a JSON field output.  We cannot detect if you are using these, of course.
* Parameter(s): a JSON RPC input.
* Getmanifest Reply: a field in the JSON reply which plugins give to `getmanifest`.
* Hook Return: a field/value in the JSON reply which plugins give to a plugin hook.
* Notification/Hook Field: a field in the JSON notification/hook to a plugin.

For each deprecation:
1. The deprecation is listed here, and in the CHANGELOG.md file.
2. We try to give at least 2 versions before removal.
3. Then one version where we issue a warning message if we detect a deprecated feature being used (not possible for deprecatred `Field` types).
4. At least one version where the deprecated feature can be explicit re-enabled using `i-promise-to-fix-broken-api-user=FEATURENAME`.


This is designed to minimize the chance that anyone will be surprised by a change!

You can also test earlier.  Deprecated features can be disabled in three ways:
1. `developer` mode changes the default deprecations to disabled globally.
2. `allow-deprecated-apis=` lets you disable (`false`) or re-enable (`true`) globally.
3. The `deprecations` JSON API can disable/re-enable deprecations for a specific client (added in *v24.02*).