From c29ebb4d2dec039f1fef4648e73cb2c615ded86b Mon Sep 17 00:00:00 2001
From: Otto Allmendinger <otto@bitgo.com>
Date: Thu, 5 Sep 2024 17:38:13 +0200
Subject: [PATCH] feat: wrap maxWeightToSatisfy

Issue: BTC-1460
---
 packages/wasm-miniscript/src/descriptor.rs | 12 ++++++++++++
 packages/wasm-miniscript/test/test.ts      |  2 ++
 2 files changed, 14 insertions(+)

diff --git a/packages/wasm-miniscript/src/descriptor.rs b/packages/wasm-miniscript/src/descriptor.rs
index dc7d0d3..9a92f8b 100644
--- a/packages/wasm-miniscript/src/descriptor.rs
+++ b/packages/wasm-miniscript/src/descriptor.rs
@@ -82,6 +82,18 @@ impl WrapDescriptor {
         Ok(self.explicit_script()?.to_asm_string())
     }
 
+    #[wasm_bindgen(js_name = maxWeightToSatisfy)]
+    pub fn max_weight_to_satisfy(&self) -> Result<u32, JsError> {
+        let weight = (match &self.0 {
+            WrapDescriptorEnum::Derivable(desc, _) => {
+                desc.max_weight_to_satisfy()
+            }
+            WrapDescriptorEnum::Definite(desc) => desc.max_weight_to_satisfy(),
+            WrapDescriptorEnum::String(desc) => desc.max_weight_to_satisfy(),
+        })?;
+        weight.to_wu().try_into().map_err(|_| JsError::new("Weight exceeds u32"))
+    }
+
     #[wasm_bindgen(js_name = fromString, skip_typescript)]
     pub fn from_string(descriptor: &str, pk_type: &str) -> Result<WrapDescriptor, JsError> {
         match pk_type {
diff --git a/packages/wasm-miniscript/test/test.ts b/packages/wasm-miniscript/test/test.ts
index db21f23..f38eec0 100644
--- a/packages/wasm-miniscript/test/test.ts
+++ b/packages/wasm-miniscript/test/test.ts
@@ -58,6 +58,8 @@ describe("Descriptor fixtures", function () {
           fixture.script,
         );
       }
+
+      assert.ok(Number.isInteger(descriptor.maxWeightToSatisfy()));
     });
   });
 });