feat: allow to switch tls-provider in client and grpc

tls-native-roots allows uses the platform's native certificate store while tls-webpki-roots contains  Mozilla's trusted root certificates for use.
The former one can be used on most platforms but might lead to issues on mobile platforms such as Android. For Android webpki works well.
We provide a feature flag to switch between those two options.

Author: bonomat

ark-bdk-wallet/Cargo.toml

@@ -5,7 +5,7 @@ edition = "2021"
 
 [dependencies]
 anyhow = "1"
-ark-client = { path = "../ark-client" }
+ark-client = { path = "../ark-client", default-features = false }
 ark-core = { path = "../ark-core" }
 async-stream = "0.3"
 bdk_wallet = "1.0.0"

ark-client/Cargo.toml

@@ -24,9 +24,9 @@ tokio = { version = "1.41.0", features = ["sync", "rt-multi-thread"] }
 tracing = "0.1.37"
 
 [target.'cfg(not(all(target_arch = "wasm32", target_os = "unknown")))'.dependencies]
-ark-grpc = { path = "../ark-grpc", version = "0.7.0" }
+ark-grpc = { path = "../ark-grpc", version = "0.7.0", default-features = false }
 backon = { version = "1", features = ["tokio-sleep"] }
-tonic = { version = "0.12", features = ["tls-native-roots"] }
+tonic = "0.12"
 
 # TODO: We do not yet support WASM in `ark-client`. To support WASM in this high level crate, we
 # will need to make it possible to use either `ark-grpc` or `ark-rest`. The current default is
@@ -44,3 +44,8 @@ tonic-build = { version = "0.12.3" }
 
 [dev-dependencies]
 tokio = { version = "1.41.0", features = ["macros", "rt"] }
+
+[features]
+default = ["tls-native-roots"]
+tls-native-roots = ["tonic/tls-native-roots", "ark-grpc/tls-native-roots"]
+tls-webpki-roots = ["tonic/tls-webpki-roots", "ark-grpc/tls-webpki-roots"]

ark-grpc/Cargo.toml

@@ -19,11 +19,16 @@ musig = { package = "ark-secp256k1", path = "../ark-rust-secp256k1", features =
 prost = { version = "0.13", default-features = false }
 prost-types = { version = "0.13", default-features = false }
 serde_json = "1.0"
-tonic = { version = "0.12", default-features = false, features = ["tls-native-roots", "transport", "codegen", "prost"] }
+tonic = { version = "0.12", default-features = false, features = ["transport", "codegen", "prost"] }
 
 [target.'cfg(genproto)'.build-dependencies]
 tonic-build = { version = "0.12" }
 
+[features]
+default = ["tls-webpki-roots"]
+tls-native-roots = ["tonic/tls-native-roots"]
+tls-webpki-roots = ["tonic/tls-webpki-roots"]
+
 [dev-dependencies]
 console_log = "1"
 tokio = { version = "1.41", features = ["macros", "rt"] }