feat: add claimable_on_close_sats to ChannelDetails

Add claimable_on_close_sats field to ChannelDetails struct, computed from
the channel monitor's ClaimableOnChannelClose balance. This replaces the
workaround of approximating claimable amount using outbound_capacity + reserve.

Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>

Author: ovitrif

CHANGELOG.md

@@ -1,3 +1,12 @@
+# 0.7.0-rc.7 (Synonym Fork)
+
+## Synonym Fork Additions
+- Added `claimable_on_close_sats` field to `ChannelDetails` struct. This field contains the
+  amount (in satoshis) that would be claimable if the channel were force-closed now, computed
+  from the channel monitor's `ClaimableOnChannelClose` balance. Returns `None` if no monitor
+  exists yet (pre-funding). This replaces the workaround of approximating the claimable amount
+  using `outbound_capacity_msat + counterparty_reserve`.
+
 # 0.7.0-rc.6 (Synonym Fork)
 
 ## Synonym Fork Additions

Cargo.toml

@@ -1,6 +1,6 @@
 [package]
 name = "ldk-node"
-version = "0.7.0-rc.6"
+version = "0.7.0-rc.7"
 authors = ["Elias Rohrer <dev@tnull.de>"]
 homepage = "https://lightningdevkit.org/"
 license = "MIT OR Apache-2.0"

Package.swift

@@ -3,8 +3,8 @@
 
 import PackageDescription
 
-let tag = "v0.7.0-rc.6"
-let checksum = "4ea23aedbf918a1c93539168f34e626cbe867c1d5e827b7b7fd0e84225970b91"
+let tag = "v0.7.0-rc.7"
+let checksum = "102ad31d567fdb176ba92ae4453ca67772383b95f4fa250951f1bdf4228da45e"
 let url = "https://github.com/synonymdev/ldk-node/releases/download/\(tag)/LDKNodeFFI.xcframework.zip"
 
 let package = Package(

bindings/kotlin/ldk-node-android/gradle.properties

@@ -2,4 +2,4 @@ org.gradle.jvmargs=-Xmx1536m
 android.useAndroidX=true
 android.enableJetifier=true
 kotlin.code.style=official
-libraryVersion=0.7.0-rc.6
+libraryVersion=0.7.0-rc.7

bindings/kotlin/ldk-node-android/lib/src/main/jniLibs/arm64-v8a/libldk_node.so

@@ -8873,6 +8873,7 @@ object FfiConverterTypeChannelDetails: FfiConverterRustBuffer<ChannelDetails> {
             FfiConverterULong.read(buf),
             FfiConverterOptionalULong.read(buf),
             FfiConverterTypeChannelConfig.read(buf),
+            FfiConverterOptionalULong.read(buf),
         )
     }
 
@@ -8907,7 +8908,8 @@ object FfiConverterTypeChannelDetails: FfiConverterRustBuffer<ChannelDetails> {
             FfiConverterOptionalUShort.allocationSize(value.`forceCloseSpendDelay`) +
             FfiConverterULong.allocationSize(value.`inboundHtlcMinimumMsat`) +
             FfiConverterOptionalULong.allocationSize(value.`inboundHtlcMaximumMsat`) +
-            FfiConverterTypeChannelConfig.allocationSize(value.`config`)
+            FfiConverterTypeChannelConfig.allocationSize(value.`config`) +
+            FfiConverterOptionalULong.allocationSize(value.`claimableOnCloseSats`)
     )
 
     override fun write(value: ChannelDetails, buf: ByteBuffer) {
@@ -8942,6 +8944,7 @@ object FfiConverterTypeChannelDetails: FfiConverterRustBuffer<ChannelDetails> {
         FfiConverterULong.write(value.`inboundHtlcMinimumMsat`, buf)
         FfiConverterOptionalULong.write(value.`inboundHtlcMaximumMsat`, buf)
         FfiConverterTypeChannelConfig.write(value.`config`, buf)
+        FfiConverterOptionalULong.write(value.`claimableOnCloseSats`, buf)
     }
 }
 

bindings/kotlin/ldk-node-android/lib/src/main/jniLibs/armeabi-v7a/libldk_node.so

@@ -756,7 +756,8 @@ data class ChannelDetails (
     val `forceCloseSpendDelay`: kotlin.UShort?, 
     val `inboundHtlcMinimumMsat`: kotlin.ULong, 
     val `inboundHtlcMaximumMsat`: kotlin.ULong?, 
-    val `config`: ChannelConfig
+    val `config`: ChannelConfig, 
+    val `claimableOnCloseSats`: kotlin.ULong?
 ) {
     companion object
 }

bindings/kotlin/ldk-node-android/lib/src/main/jniLibs/x86_64/libldk_node.so

@@ -1,3 +1,3 @@
 org.gradle.jvmargs=-Xmx1536m
 kotlin.code.style=official
-libraryVersion=0.7.0-rc.6
+libraryVersion=0.7.0-rc.7