flesh out scanblocks params

Author: chrisguida

Diff for: client/src/client.rs

@@ -1258,9 +1258,19 @@ pub trait RpcApi: Sized {
 
     fn scan_blocks_blocking(
         &self,
-        descriptors: &[json::ScanBlocksRequest],
+        request: json::ScanBlocksRequest,
     ) -> Result<json::ScanBlocksResult> {
-        self.call("scanblocks", &["start".into(), into_json(descriptors)?])
+        self.call(
+            "scanblocks",
+            &[
+                "start".into(),
+                into_json(request.scanobjects)?,
+                into_json(request.start_height)?,
+                into_json(request.stop_height)?,
+                into_json(request.filtertype)?,
+                into_json(request.options)?,
+            ],
+        )
     }
 
     fn scan_tx_out_set_blocking(

Diff for: json/src/lib.rs

@@ -2087,10 +2087,32 @@ pub enum PubKeyOrAddress<'a> {
     PubKey(&'a PublicKey),
 }
 
+#[derive(Serialize, Clone, PartialEq, Eq, Debug)]
+/// Start a scan of the block filter index for an [output descriptor](https://github.com/bitcoin/bitcoin/blob/master/doc/descriptors.md).
+pub struct ScanBlocksRequest<'a> {
+    /// List of descriptors to scan
+    pub scanobjects: &'a [ScanBlocksRequestDescriptor],
+    /// Height at which to start scanning
+    pub start_height: Option<u64>,
+    /// Height at which to stop scanning
+    pub stop_height: Option<u64>,
+    /// Filter type. Only "basic" is supported for now.
+    pub filtertype: Option<String>,
+    /// Additional scan options. Only "filter_false_positives" is supported for now.
+    pub options: Option<ScanBlocksOptions>,
+}
+
+#[derive(Serialize, Clone, PartialEq, Eq, Debug)]
+/// Options struct for `scanblocks` rpc
+pub struct ScanBlocksOptions {
+    /// Scan for a single descriptor
+    pub filter_false_positives: Option<bool>,
+}
+
 #[derive(Serialize, Deserialize, Clone, PartialEq, Eq, Debug)]
 #[serde(untagged)]
-/// Start a scan of the UTXO set for an [output descriptor](https://github.com/bitcoin/bitcoin/blob/master/doc/descriptors.md).
-pub enum ScanBlocksRequest {
+/// Descriptors to scan in `scanblocks` rpc
+pub enum ScanBlocksRequestDescriptor {
     /// Scan for a single descriptor
     Single(String),
     /// Scan for a descriptor with xpubs