Add ChannelId pending change note; formatting

lightning/src/ln/channel_id.rs

@@ -21,7 +21,9 @@ use core::fmt;
 use core::ops::Deref;
 
 /// A unique 32-byte identifier for a channel.
-/// Depending on how the ID is generated, several varieties are distinguished (but all are stored as 32 bytes): _v1_ and _temporary_.
+/// Depending on how the ID is generated, several varieties are distinguished
+/// (but all are stored as 32 bytes):
+///   _v1_ and _temporary_.
 /// A _v1_ channel ID is generated based on funding tx outpoint (txid & index).
 /// A _temporary_ ID is generated randomly.
 /// (Later revocation-point-based _v2_ is a possibility.)

lightning/src/ln/payment_tests.rs

@@ -16,7 +16,7 @@ use crate::chain::channelmonitor::{ANTI_REORG_DELAY, HTLC_FAIL_BACK_BUFFER, LATE
 use crate::sign::EntropySource;
 use crate::chain::transaction::OutPoint;
 use crate::events::{ClosureReason, Event, HTLCDestination, MessageSendEvent, MessageSendEventsProvider, PathFailure, PaymentFailureReason, PaymentPurpose};
-use crate::ln::channel::{EXPIRE_PREV_CONFIG_TICKS};
+use crate::ln::channel::EXPIRE_PREV_CONFIG_TICKS;
 use crate::ln::channelmanager::{BREAKDOWN_TIMEOUT, MPP_TIMEOUT_TICKS, MIN_CLTV_EXPIRY_DELTA, PaymentId, PaymentSendFailure, IDEMPOTENCY_TIMEOUT_TICKS, RecentPaymentDetails, RecipientOnionFields, HTLCForwardInfo, PendingHTLCRouting, PendingAddHTLCInfo};
 use crate::ln::features::Bolt11InvoiceFeatures;
 use crate::ln::{msgs, ChannelId, PaymentSecret, PaymentPreimage};

pending_changelog/new_channel_id_type_pr_2485.txt

@@ -0,0 +1 @@
+* In several APIs, `channel_id` parameters have been changed from type `[u8; 32]` to newly introduced `ChannelId` type, from `ln` namespace (`lightning::ln::ChannelId`) (PR #2485)