Add str conversions for types for JSON

Cargo.toml

@@ -19,6 +19,7 @@ doctest = false
 crate-git-revision = "0.0.6"
 
 [dependencies]
+stellar-strkey = { version = "0.0.7", optional = true }
 base64 = { version = "0.13.0", optional = true }
 serde = { version = "1.0.139", features = ["derive"], optional = true }
 serde_with = { version = "3.0.0", optional = true }
@@ -33,15 +34,15 @@ serde_json = "1.0.89"
 
 [features]
 default = ["std", "curr"]
-std = ["alloc"]
+std = ["alloc", "dep:stellar-strkey"]
 alloc = ["dep:hex"]
 curr = []
 next = []
 
 # Features dependent on optional dependencies.
 base64 = ["std", "dep:base64"]
 serde = ["alloc", "dep:serde", "dep:serde_with", "hex/serde"]
-serde_json = ["serde", "dep:serde_json"]
+serde_json = ["std", "serde", "dep:serde_json"]
 arbitrary = ["std", "dep:arbitrary"]
 hex = []
 

Makefile

@@ -2,9 +2,11 @@ export RUSTFLAGS=-Dwarnings -Dclippy::all -Dclippy::pedantic
 
 CARGO_HACK_ARGS=--feature-powerset --exclude-features default --group-features base64,serde,arbitrary,hex
 
-XDRGEN_VERSION=b405294c
 CARGO_DOC_ARGS?=--open
 
+XDRGEN_VERSION=64612a24
+XDRGEN_TYPES_CUSTOM_STR_IMPL=PublicKey,AccountId,MuxedAccount,MuxedAccountMed25519,SignerKey,SignerKeyEd25519SignedPayload,NodeId
+
 all: build test
 
 test:
@@ -35,12 +37,12 @@ ifeq ($(LOCAL_XDRGEN),)
 	docker run -i --rm -v $$PWD:/wd -w /wd docker.io/library/ruby:latest /bin/bash -c '\
 		gem install specific_install -v 0.3.8 && \
 		gem specific_install https://github.com/stellar/xdrgen.git -b $(XDRGEN_VERSION) && \
-		xdrgen --language rust --namespace generated --output src/curr $^ \
+		xdrgen --language rust --namespace generated --output src/curr --rust-types-custom-str-impl $(XDRGEN_TYPES_CUSTOM_STR_IMPL) $^ \
 		'
 else
 	docker run -i --rm -v $$PWD/../xdrgen:/xdrgen -v $$PWD:/wd -w /wd docker.io/library/ruby:latest /bin/bash -c '\
 		pushd /xdrgen && bundle install --deployment && rake install && popd && \
-		xdrgen --language rust --namespace generated --output src/curr $^ \
+		xdrgen --language rust --namespace generated --output src/curr --rust-types-custom-str-impl $(XDRGEN_TYPES_CUSTOM_STR_IMPL) $^ \
 		'
 endif
 	rustfmt $@