dust checks

src/types/address.rs

@@ -1,15 +1,15 @@
 use std::{ops::Deref, str::FromStr};
 
 use bdk_wallet::{
-    bitcoin::{Address as BdkAddress, AddressType as BdkAddressType, Network as BdkNetwork, ScriptBuf as BdkScriptBuf},
+    bitcoin::{Address as BdkAddress, AddressType as BdkAddressType, Network as BdkNetwork},
     AddressInfo as BdkAddressInfo,
 };
 use bitcoin::address::ParseError;
 use wasm_bindgen::prelude::wasm_bindgen;
 
 use crate::{
     result::JsResult,
-    types::{BdkError, BdkErrorCode},
+    types::{BdkError, BdkErrorCode, ScriptBuf},
 };
 
 use super::{KeychainKind, Network};
@@ -143,73 +143,6 @@ impl From<ParseError> for BdkError {
     }
 }
 
-/// An owned, growable script.
-///
-/// `ScriptBuf` is the most common script type that has the ownership over the contents of the
-/// script. It has a close relationship with its borrowed counterpart, [`Script`].
-#[wasm_bindgen]
-#[derive(Clone)]
-pub struct ScriptBuf(BdkScriptBuf);
-
-impl Deref for ScriptBuf {
-    type Target = BdkScriptBuf;
-
-    fn deref(&self) -> &Self::Target {
-        &self.0
-    }
-}
-
-#[wasm_bindgen]
-impl ScriptBuf {
-    pub fn from_hex(s: &str) -> JsResult<Self> {
-        let script = BdkScriptBuf::from_hex(s)?;
-        Ok(script.into())
-    }
-
-    pub fn from_bytes(bytes: Vec<u8>) -> Self {
-        BdkScriptBuf::from_bytes(bytes).into()
-    }
-
-    #[allow(clippy::inherent_to_string)]
-    #[wasm_bindgen(js_name = toString)]
-    pub fn to_string(&self) -> String {
-        self.0.to_string()
-    }
-
-    pub fn as_bytes(&self) -> Vec<u8> {
-        self.0.as_bytes().to_vec()
-    }
-
-    pub fn to_asm_string(&self) -> String {
-        self.0.to_asm_string()
-    }
-
-    pub fn to_hex_string(&self) -> String {
-        self.0.to_hex_string()
-    }
-
-    pub fn is_op_return(&self) -> bool {
-        self.0.is_op_return()
-    }
-
-    #[wasm_bindgen(js_name = clone)]
-    pub fn js_clone(&self) -> ScriptBuf {
-        self.clone()
-    }
-}
-
-impl From<BdkScriptBuf> for ScriptBuf {
-    fn from(inner: BdkScriptBuf) -> Self {
-        ScriptBuf(inner)
-    }
-}
-
-impl From<ScriptBuf> for BdkScriptBuf {
-    fn from(script_buf: ScriptBuf) -> Self {
-        script_buf.0
-    }
-}
-
 /// The different types of addresses.
 #[wasm_bindgen]
 #[derive(Clone, Copy, PartialEq, Eq)]

src/types/amount.rs

@@ -1,11 +1,14 @@
 use std::ops::Deref;
 
-use bdk_wallet::bitcoin::{Amount as BdkAmount, Denomination as BdkDenomination};
+use bdk_wallet::{
+    bitcoin::{Amount as BdkAmount, Denomination as BdkDenomination},
+    IsDust,
+};
 use bitcoin::amount::ParseAmountError;
 use serde::Serialize;
 use wasm_bindgen::prelude::wasm_bindgen;
 
-use crate::types::{BdkError, BdkErrorCode};
+use crate::types::{BdkError, BdkErrorCode, ScriptBuf};
 
 /// Amount
 ///
@@ -44,6 +47,12 @@ impl Amount {
     pub fn to_float_in(&self, denom: Denomination) -> f64 {
         self.0.to_float_in(denom.into())
     }
+
+    /// Check whether or not a value is below dust limit
+    /// for a given script
+    pub fn is_dust(&self, script: ScriptBuf) -> bool {
+        self.0.is_dust(&script)
+    }
 }
 
 impl Deref for Amount {

src/types/mod.rs

@@ -12,6 +12,7 @@ mod keychain;
 mod network;
 mod output;
 mod psbt;
+mod script;
 mod slip10;
 mod transaction;
 
@@ -29,5 +30,6 @@ pub use keychain::*;
 pub use network::*;
 pub use output::*;
 pub use psbt::*;
+pub use script::*;
 pub use slip10::*;
 pub use transaction::*;

src/types/script.rs

@@ -0,0 +1,88 @@
+use std::ops::Deref;
+
+use bdk_wallet::bitcoin::ScriptBuf as BdkScriptBuf;
+use wasm_bindgen::prelude::wasm_bindgen;
+
+use crate::{
+    result::JsResult,
+    types::{Amount, FeeRate},
+};
+
+/// An owned, growable script.
+///
+/// `ScriptBuf` is the most common script type that has the ownership over the contents of the
+/// script. It has a close relationship with its borrowed counterpart, [`Script`].
+#[wasm_bindgen]
+#[derive(Clone)]
+pub struct ScriptBuf(BdkScriptBuf);
+
+impl Deref for ScriptBuf {
+    type Target = BdkScriptBuf;
+
+    fn deref(&self) -> &Self::Target {
+        &self.0
+    }
+}
+
+#[wasm_bindgen]
+impl ScriptBuf {
+    pub fn from_hex(s: &str) -> JsResult<Self> {
+        let script = BdkScriptBuf::from_hex(s)?;
+        Ok(script.into())
+    }
+
+    pub fn from_bytes(bytes: Vec<u8>) -> Self {
+        BdkScriptBuf::from_bytes(bytes).into()
+    }
+
+    #[allow(clippy::inherent_to_string)]
+    #[wasm_bindgen(js_name = toString)]
+    pub fn to_string(&self) -> String {
+        self.0.to_string()
+    }
+
+    pub fn as_bytes(&self) -> Vec<u8> {
+        self.0.as_bytes().to_vec()
+    }
+
+    pub fn to_asm_string(&self) -> String {
+        self.0.to_asm_string()
+    }
+
+    pub fn to_hex_string(&self) -> String {
+        self.0.to_hex_string()
+    }
+
+    pub fn is_op_return(&self) -> bool {
+        self.0.is_op_return()
+    }
+
+    #[wasm_bindgen(js_name = clone)]
+    pub fn js_clone(&self) -> ScriptBuf {
+        self.clone()
+    }
+
+    /// Returns the minimum value an output with this script should have in order to be
+    /// broadcastable on today's Bitcoin network.
+    pub fn minimal_non_dust(&self) -> Amount {
+        self.0.minimal_non_dust().into()
+    }
+
+    /// Returns the minimum value an output with this script should have in order to be
+    /// broadcastable on today's Bitcoin network.
+    pub fn minimal_non_dust_custom(&self, dust_relay_fee: FeeRate) -> Amount {
+        self.0.minimal_non_dust_custom(dust_relay_fee.into()).into()
+    }
+}
+
+impl From<BdkScriptBuf> for ScriptBuf {
+    fn from(inner: BdkScriptBuf) -> Self {
+        ScriptBuf(inner)
+    }
+}
+
+impl From<ScriptBuf> for BdkScriptBuf {
+    fn from(script_buf: ScriptBuf) -> Self {
+        script_buf.0
+    }
+}