Implement a pretty Debug for various objects

coins/monero/src/lib.rs

@@ -170,12 +170,18 @@ impl Protocol {
 
 /// Transparent structure representing a Pedersen commitment's contents.
 #[allow(non_snake_case)]
-#[derive(Clone, PartialEq, Eq, Debug, Zeroize, ZeroizeOnDrop)]
+#[derive(Clone, PartialEq, Eq, Zeroize, ZeroizeOnDrop)]
 pub struct Commitment {
   pub mask: Scalar,
   pub amount: u64,
 }
 
+impl core::fmt::Debug for Commitment {
+  fn fmt(&self, fmt: &mut core::fmt::Formatter<'_>) -> Result<(), core::fmt::Error> {
+    fmt.debug_struct("Commitment").field("amount", &self.amount).finish_non_exhaustive()
+  }
+}
+
 impl Commitment {
   /// A commitment to zero, defined with a mask of 1 (as to not be the identity).
   pub fn zero() -> Commitment {

coins/monero/src/wallet/address.rs

@@ -182,13 +182,26 @@ impl<B: AddressBytes> AddressMeta<B> {
 }
 
 /// A Monero address, composed of metadata and a spend/view key.
-#[derive(Clone, Copy, PartialEq, Eq, Debug)]
+#[derive(Clone, Copy, PartialEq, Eq)]
 pub struct Address<B: AddressBytes> {
   pub meta: AddressMeta<B>,
   pub spend: EdwardsPoint,
   pub view: EdwardsPoint,
 }
 
+impl<B: AddressBytes> core::fmt::Debug for Address<B> {
+  fn fmt(&self, fmt: &mut core::fmt::Formatter<'_>) -> Result<(), core::fmt::Error> {
+    fmt
+      .debug_struct("Address")
+      .field("meta", &self.meta)
+      .field("spend", &hex::encode(self.spend.compress().0))
+      .field("view", &hex::encode(self.view.compress().0))
+      // This is not a real field yet is the most valuable thing to know when debugging
+      .field("(address)", &self.to_string())
+      .finish()
+  }
+}
+
 impl<B: AddressBytes> Zeroize for Address<B> {
   fn zeroize(&mut self) {
     self.meta.zeroize();

coins/monero/src/wallet/scan.rs

@@ -20,12 +20,18 @@ use crate::{
 };
 
 /// An absolute output ID, defined as its transaction hash and output index.
-#[derive(Clone, PartialEq, Eq, Debug, Zeroize, ZeroizeOnDrop)]
+#[derive(Clone, PartialEq, Eq, Zeroize, ZeroizeOnDrop)]
 pub struct AbsoluteId {
   pub tx: [u8; 32],
   pub o: u8,
 }
 
+impl core::fmt::Debug for AbsoluteId {
+  fn fmt(&self, fmt: &mut core::fmt::Formatter<'_>) -> Result<(), core::fmt::Error> {
+    fmt.debug_struct("AbsoluteId").field("tx", &hex::encode(self.tx)).field("o", &self.o).finish()
+  }
+}
+
 impl AbsoluteId {
   pub fn write<W: Write>(&self, w: &mut W) -> io::Result<()> {
     w.write_all(&self.tx)?;
@@ -44,7 +50,7 @@ impl AbsoluteId {
 }
 
 /// The data contained with an output.
-#[derive(Clone, PartialEq, Eq, Debug, Zeroize, ZeroizeOnDrop)]
+#[derive(Clone, PartialEq, Eq, Zeroize, ZeroizeOnDrop)]
 pub struct OutputData {
   pub key: EdwardsPoint,
   /// Absolute difference between the spend key and the key in this output
@@ -52,6 +58,17 @@ pub struct OutputData {
   pub commitment: Commitment,
 }
 
+impl core::fmt::Debug for OutputData {
+  fn fmt(&self, fmt: &mut core::fmt::Formatter<'_>) -> Result<(), core::fmt::Error> {
+    fmt
+      .debug_struct("OutputData")
+      .field("key", &hex::encode(self.key.compress().0))
+      .field("key_offset", &hex::encode(self.key_offset.to_bytes()))
+      .field("commitment", &self.commitment)
+      .finish()
+  }
+}
+
 impl OutputData {
   pub fn write<W: Write>(&self, w: &mut W) -> io::Result<()> {
     w.write_all(&self.key.compress().to_bytes())?;
@@ -76,7 +93,7 @@ impl OutputData {
 }
 
 /// The metadata for an output.
-#[derive(Clone, PartialEq, Eq, Debug, Zeroize, ZeroizeOnDrop)]
+#[derive(Clone, PartialEq, Eq, Zeroize, ZeroizeOnDrop)]
 pub struct Metadata {
   /// The subaddress this output was sent to.
   pub subaddress: Option<SubaddressIndex>,
@@ -89,6 +106,17 @@ pub struct Metadata {
   pub arbitrary_data: Vec<Vec<u8>>,
 }
 
+impl core::fmt::Debug for Metadata {
+  fn fmt(&self, fmt: &mut core::fmt::Formatter<'_>) -> Result<(), core::fmt::Error> {
+    fmt
+      .debug_struct("Metadata")
+      .field("subaddress", &self.subaddress)
+      .field("payment_id", &hex::encode(self.payment_id))
+      .field("arbitrary_data", &self.arbitrary_data.iter().map(hex::encode).collect::<Vec<_>>())
+      .finish()
+  }
+}
+
 impl Metadata {
   pub fn write<W: Write>(&self, w: &mut W) -> io::Result<()> {
     if let Some(subaddress) = self.subaddress {