Encode claimable balance ids to match Horizon in JSON

Makefile

@@ -5,8 +5,8 @@ CARGO_HACK_ARGS=--feature-powerset --exclude-features default --group-features b
 CARGO_DOC_ARGS?=--open
 
 XDRGEN_VERSION=e2cac557162d99b12ae73b846cf3d5bfe16636de
-XDRGEN_TYPES_CUSTOM_STR_IMPL_CURR=PublicKey,AccountId,MuxedAccount,MuxedAccountMed25519,SignerKey,SignerKeyEd25519SignedPayload,NodeId,ScAddress,AssetCode,AssetCode4,AssetCode12
-XDRGEN_TYPES_CUSTOM_STR_IMPL_NEXT=PublicKey,AccountId,MuxedAccount,MuxedAccountMed25519,SignerKey,SignerKeyEd25519SignedPayload,NodeId,ScAddress,AssetCode,AssetCode4,AssetCode12
+XDRGEN_TYPES_CUSTOM_STR_IMPL_CURR=PublicKey,AccountId,MuxedAccount,MuxedAccountMed25519,SignerKey,SignerKeyEd25519SignedPayload,NodeId,ScAddress,AssetCode,AssetCode4,AssetCode12,ClaimableBalanceId
+XDRGEN_TYPES_CUSTOM_STR_IMPL_NEXT=PublicKey,AccountId,MuxedAccount,MuxedAccountMed25519,SignerKey,SignerKeyEd25519SignedPayload,NodeId,ScAddress,AssetCode,AssetCode4,AssetCode12,ClaimableBalanceId
 
 all: build test
 

src/curr/generated.rs

@@ -14504,8 +14504,7 @@ impl WriteXdr for ClaimableBalanceIdType {
 #[cfg_attr(feature = "arbitrary", derive(Arbitrary))]
 #[cfg_attr(
     all(feature = "serde", feature = "alloc"),
-    derive(serde::Serialize, serde::Deserialize),
-    serde(rename_all = "snake_case")
+    derive(serde_with::SerializeDisplay, serde_with::DeserializeFromStr)
 )]
 #[allow(clippy::large_enum_variant)]
 pub enum ClaimableBalanceId {

src/curr/str.rs

@@ -18,11 +18,15 @@
 //# - AssetCode
 //# - AssetCode4
 //# - AssetCode12
+//#
+//# ## Other
+//# - ClaimableBalanceId
 #![cfg(feature = "alloc")]
 
 use super::{
-    AccountId, AssetCode, AssetCode12, AssetCode4, Error, Hash, MuxedAccount, MuxedAccountMed25519,
-    NodeId, PublicKey, ScAddress, SignerKey, SignerKeyEd25519SignedPayload, Uint256,
+    AccountId, AssetCode, AssetCode12, AssetCode4, ClaimableBalanceId, Error, Hash, MuxedAccount,
+    MuxedAccountMed25519, NodeId, PublicKey, ScAddress, SignerKey, SignerKeyEd25519SignedPayload,
+    Uint256,
 };
 
 impl From<stellar_strkey::DecodeError> for Error {
@@ -336,3 +340,40 @@ impl core::fmt::Display for AssetCode {
         }
     }
 }
+
+impl core::str::FromStr for ClaimableBalanceId {
+    type Err = Error;
+    fn from_str(s: &str) -> core::result::Result<Self, Self::Err> {
+        // This conversion to a hex string could be done by XDR encoding the
+        // self value, but because XDR encoding requires the std feature, this
+        // approach is taken instead to preserve the fact that the serde feature
+        // is available with alloc only.
+        let bytes = hex::decode(s).map_err(|_| Error::InvalidHex)?;
+        match bytes.as_slice() {
+            [0, 0, 0, 0, ..] => Ok(ClaimableBalanceId::ClaimableBalanceIdTypeV0(Hash(
+                (&bytes[4..]).try_into()?,
+            ))),
+            _ => Err(Error::Invalid),
+        }
+    }
+}
+
+impl core::fmt::Display for ClaimableBalanceId {
+    fn fmt(&self, f: &mut core::fmt::Formatter<'_>) -> core::fmt::Result {
+        // This conversion from a hex string could be done by XDR decoding the
+        // self value, but because XDR decoding requires the std feature, this
+        // approach is taken instead to preserve the fact that the serde feature
+        // is available with alloc only.
+        match self {
+            ClaimableBalanceId::ClaimableBalanceIdTypeV0(Hash(bytes)) => {
+                for b in [0u8, 0, 0, 0] {
+                    write!(f, "{b:02x}")?;
+                }
+                for b in bytes {
+                    write!(f, "{b:02x}")?;
+                }
+            }
+        }
+        Ok(())
+    }
+}

src/next/generated.rs

@@ -14504,8 +14504,7 @@ impl WriteXdr for ClaimableBalanceIdType {
 #[cfg_attr(feature = "arbitrary", derive(Arbitrary))]
 #[cfg_attr(
     all(feature = "serde", feature = "alloc"),
-    derive(serde::Serialize, serde::Deserialize),
-    serde(rename_all = "snake_case")
+    derive(serde_with::SerializeDisplay, serde_with::DeserializeFromStr)
 )]
 #[allow(clippy::large_enum_variant)]
 pub enum ClaimableBalanceId {

src/next/str.rs

@@ -18,11 +18,15 @@
 //# - AssetCode
 //# - AssetCode4
 //# - AssetCode12
+//#
+//# ## Other
+//# - ClaimableBalanceId
 #![cfg(feature = "alloc")]
 
 use super::{
-    AccountId, AssetCode, AssetCode12, AssetCode4, Error, Hash, MuxedAccount, MuxedAccountMed25519,
-    NodeId, PublicKey, ScAddress, SignerKey, SignerKeyEd25519SignedPayload, Uint256,
+    AccountId, AssetCode, AssetCode12, AssetCode4, ClaimableBalanceId, Error, Hash, MuxedAccount,
+    MuxedAccountMed25519, NodeId, PublicKey, ScAddress, SignerKey, SignerKeyEd25519SignedPayload,
+    Uint256,
 };
 
 impl From<stellar_strkey::DecodeError> for Error {
@@ -325,3 +329,40 @@ impl core::fmt::Display for AssetCode {
         }
     }
 }
+
+impl core::str::FromStr for ClaimableBalanceId {
+    type Err = Error;
+    fn from_str(s: &str) -> core::result::Result<Self, Self::Err> {
+        // This conversion to a hex string could be done by XDR encoding the
+        // self value, but because XDR encoding requires the std feature, this
+        // approach is taken instead to preserve the fact that the serde feature
+        // is available with alloc only.
+        let bytes = hex::decode(s).map_err(|_| Error::InvalidHex)?;
+        match bytes.as_slice() {
+            [0, 0, 0, 0, ..] => Ok(ClaimableBalanceId::ClaimableBalanceIdTypeV0(Hash(
+                (&bytes[4..]).try_into()?,
+            ))),
+            _ => Err(Error::Invalid),
+        }
+    }
+}
+
+impl core::fmt::Display for ClaimableBalanceId {
+    fn fmt(&self, f: &mut core::fmt::Formatter<'_>) -> core::fmt::Result {
+        // This conversion from a hex string could be done by XDR decoding the
+        // self value, but because XDR decoding requires the std feature, this
+        // approach is taken instead to preserve the fact that the serde feature
+        // is available with alloc only.
+        match self {
+            ClaimableBalanceId::ClaimableBalanceIdTypeV0(Hash(bytes)) => {
+                for b in [0u8, 0, 0, 0] {
+                    write!(f, "{b:02x}")?;
+                }
+                for b in bytes {
+                    write!(f, "{b:02x}")?;
+                }
+            }
+        }
+        Ok(())
+    }
+}

tests/str.rs

@@ -4,8 +4,9 @@
 use stellar_xdr::curr as stellar_xdr;
 
 use stellar_xdr::{
-    AccountId, AssetCode, AssetCode12, AssetCode4, Error, Hash, MuxedAccount, MuxedAccountMed25519,
-    NodeId, PublicKey, ScAddress, SignerKey, SignerKeyEd25519SignedPayload, Uint256,
+    AccountId, AssetCode, AssetCode12, AssetCode4, ClaimableBalanceId, Error, Hash, MuxedAccount,
+    MuxedAccountMed25519, NodeId, PublicKey, ScAddress, SignerKey, SignerKeyEd25519SignedPayload,
+    Uint256,
 };
 
 use std::str::FromStr;
@@ -541,3 +542,24 @@ fn asset_code_from_str_to_string_roundtrip_unicode() {
     assert_eq!(AssetCode::CreditAlphanum4(AssetCode4(*b"a\xc3\xc3d")).to_string(), r"a\xc3\xc3d");
     assert_eq!(AssetCode::from_str(r"a\xc3\xc3d"), Ok(AssetCode::CreditAlphanum4(AssetCode4(*b"a\xc3\xc3d"))));
 }
+
+#[test]
+#[rustfmt::skip]
+fn claimable_balance_id() {
+    assert_eq!(
+        ClaimableBalanceId::ClaimableBalanceIdTypeV0(Hash([1u8; 32])).to_string(),
+        "000000000101010101010101010101010101010101010101010101010101010101010101",
+    );
+    // Valid
+    assert_eq!(ClaimableBalanceId::from_str("000000000101010101010101010101010101010101010101010101010101010101010101"), Ok(ClaimableBalanceId::ClaimableBalanceIdTypeV0(Hash([1u8; 32]))));
+    // Half byte short.
+    assert_eq!(ClaimableBalanceId::from_str("00000000010101010101010101010101010101010101010101010101010101010101010"), Err(Error::InvalidHex));
+    // Full byte short.
+    assert_eq!(ClaimableBalanceId::from_str("0000000001010101010101010101010101010101010101010101010101010101010101"), Err(Error::LengthMismatch));
+    // Half byte too long.
+    assert_eq!(ClaimableBalanceId::from_str("0000000001010101010101010101010101010101010101010101010101010101010101011"), Err(Error::InvalidHex));
+    // Full byte too long.
+    assert_eq!(ClaimableBalanceId::from_str("00000000010101010101010101010101010101010101010101010101010101010101010101"), Err(Error::LengthMismatch));
+    // Unrecognized discriminant value.
+    assert_eq!(ClaimableBalanceId::from_str("000000010101010101010101010101010101010101010101010101010101010101010101"), Err(Error::Invalid));
+}