refactor: use macros for Condition

Author: reez

bdk-ffi/src/bdk.udl

@@ -361,10 +361,7 @@ interface Satisfaction {
     None(string msg);
 };
 
-dictionary Condition {
-  u32? csv;
-  LockTime? timelock;
-};
+typedef record Condition;
 
 // ------------------------------------------------------------------------
 // bdk_wallet crate - bitcoin re-exports

bdk-ffi/src/types.rs

@@ -569,9 +569,12 @@ impl From<BdkSatisfaction> for Satisfaction {
     }
 }
 
-#[derive(Debug, Clone)]
+/// An extra condition that must be satisfied but that is out of control of the user
+#[derive(Debug, Clone, uniffi::Record)]
 pub struct Condition {
+    /// Optional CheckSequenceVerify condition
     pub csv: Option<u32>,
+    /// Optional timelock condition
     pub timelock: Option<LockTime>,
 }