feat(wallet): add IndexedScript and SpkIterator types, and wallet::sp…

…ks_of_all_keychains()"

bdk-ffi/src/bdk.udl

@@ -82,40 +82,22 @@ interface Wallet {
 
   [Throws=BdkError]
   void apply_update(Update update);
-};
-
-interface Update {};
-
-// ------------------------------------------------------------------------
-// bdk crate - bitcoin reexports
-// ------------------------------------------------------------------------
 
-enum Network {
-  "Bitcoin",
-  "Testnet",
-  "Signet",
-  "Regtest",
+  record<KeychainKind, SpkIterator> spks_of_all_keychains();
 };
 
-enum WordCount {
-  "Words12",
-  "Words15",
-  "Words18",
-  "Words21",
-  "Words24",
+dictionary IndexedScript {
+  u32 index;
+  Script script;
 };
 
-interface Address {
-  [Throws=BdkError]
-  constructor(string address, Network network);
-
-  Network network();
-
-  string to_qr_uri();
-
-  string as_string();
+interface SpkIterator {
+    constructor(Descriptor descriptor);
+    IndexedScript? next();
 };
 
+interface Update {};
+
 // ------------------------------------------------------------------------
 // bdk crate - descriptor module
 // ------------------------------------------------------------------------
@@ -209,3 +191,39 @@ interface Descriptor {
 interface EsploraClient {
   constructor(string url);
 };
+
+// ------------------------------------------------------------------------
+// bdk crate - bitcoin reexports
+// ------------------------------------------------------------------------
+
+interface Script {
+  constructor(sequence<u8> raw_output_script);
+
+  sequence<u8> to_bytes();
+};
+
+enum Network {
+  "Bitcoin",
+  "Testnet",
+  "Signet",
+  "Regtest",
+};
+
+enum WordCount {
+  "Words12",
+  "Words15",
+  "Words18",
+  "Words21",
+  "Words24",
+};
+
+interface Address {
+  [Throws=BdkError]
+  constructor(string address, Network network);
+
+  Network network();
+
+  string to_qr_uri();
+
+  string as_string();
+};

bdk-ffi/src/bitcoin.rs

@@ -0,0 +1,22 @@
+use bdk::bitcoin::blockdata::script::ScriptBuf as BdkScriptBuf;
+
+/// A Bitcoin script.
+#[derive(Clone, Debug, PartialEq, Eq)]
+pub struct Script(pub(crate) BdkScriptBuf);
+
+impl Script {
+    pub fn new(raw_output_script: Vec<u8>) -> Self {
+        let script: BdkScriptBuf = BdkScriptBuf::from(raw_output_script);
+        Script(script)
+    }
+
+    pub fn to_bytes(&self) -> Vec<u8> {
+        self.0.to_bytes()
+    }
+}
+
+impl From<BdkScriptBuf> for Script {
+    fn from(script: BdkScriptBuf) -> Self {
+        Script(script)
+    }
+}

bdk-ffi/src/lib.rs

@@ -1,3 +1,4 @@
+mod bitcoin;
 mod descriptor;
 mod esplora;
 mod keys;
@@ -15,16 +16,18 @@ use bdk::KeychainKind;
 use std::sync::Arc;
 
 // TODO 6: Why are these imports required?
+use crate::bitcoin::Script;
 use crate::descriptor::Descriptor;
 use crate::esplora::EsploraClient;
 use crate::keys::DerivationPath;
 use crate::keys::DescriptorPublicKey;
 use crate::keys::DescriptorSecretKey;
 use crate::keys::Mnemonic;
+use crate::wallet::IndexedScript;
+use crate::wallet::SpkIterator;
 use crate::wallet::Update;
 use crate::wallet::Wallet;
 use bdk::keys::bip39::WordCount;
-// use bdk_esplora::EsploraExt;
 
 uniffi::include_scaffolding!("bdk");