rusk: upgrade toml to workspace version

- Updated `toml` version in Rusk to workspace version
- Fixed u64 (de)serialization due to `toml` limitations
- Ingest `feeder_gas_call` as String, update example.toml accordingly

rusk/Cargo.toml

@@ -26,7 +26,7 @@ semver = { workspace = true }
 anyhow = { workspace = true }
 rustc_tools_util = { workspace = true }
 rand = { workspace = true }
-toml = "=0.5.11"
+toml = { workspace = true }
 serde = { workspace = true }
 serde_json = { workspace = true }
 serde_with = { workspace = true, features = ["hex"] }
@@ -92,7 +92,14 @@ criterion = { workspace = true }
 rustc_tools_util = { workspace = true }
 
 [features]
-default = ["ephemeral", "recovery-state", "recovery-keys", "prover", "chain", "http-wasm"]
+default = [
+    "ephemeral",
+    "recovery-state",
+    "recovery-keys",
+    "prover",
+    "chain",
+    "http-wasm",
+]
 ephemeral = ["dep:rusk-recovery", "dep:tempfile", "recovery-state", "chain"]
 recovery-state = ["rusk-recovery/state", "dep:tempfile"]
 recovery-keys = ["rusk-recovery/keys"]

rusk/default.config.toml

@@ -9,8 +9,8 @@
 #key = <path_of_key>
 
 # The default max cost for feeder calls is the maximum representable. Put in a
-# normal number to change
-#feeder_call_gas = u64::MAX 
+# a string wrapped number up to u64
+#feeder_call_gas = "18446744073709551615" 
 
 #ws_sub_channel_cap = 16,
 #ws_event_channel_cap = 1024,

rusk/src/bin/config/http.rs

@@ -7,7 +7,8 @@
 use std::path::PathBuf;
 
 use hyper::HeaderMap;
-use serde::{Deserialize, Serialize};
+use serde::de::{self, Unexpected};
+use serde::{Deserialize, Deserializer, Serialize, Serializer};
 
 use crate::args::Args;
 
@@ -17,7 +18,11 @@ pub struct HttpConfig {
     pub key: Option<PathBuf>,
     #[serde(default = "default_listen")]
     pub listen: bool,
-    #[serde(default = "default_feeder_call_gas")]
+    #[serde(
+        default = "default_feeder_call_gas",
+        deserialize_with = "deserialize_feeder_call_gas",
+        serialize_with = "serialize_feeder_call_gas"
+    )]
     pub feeder_call_gas: u64,
     listen_address: Option<String>,
     #[serde(default = "default_ws_sub_channel_cap")]
@@ -28,6 +33,36 @@ pub struct HttpConfig {
     pub headers: HeaderMap,
 }
 
+// Custom deserialization function for `feeder_call_gas`.
+// TOML values are limited to `i64::MAX` in `toml-rs`, so we parse `u64` as a
+// string.
+fn deserialize_feeder_call_gas<'de, D>(deserializer: D) -> Result<u64, D::Error>
+where
+    D: Deserializer<'de>,
+{
+    String::deserialize(deserializer)?
+        .parse::<u64>()
+        .map_err(|_| {
+            de::Error::invalid_value(
+                Unexpected::Str("a valid u64 as a string"),
+                &"a u64 integer",
+            )
+        })
+}
+
+// Custom serialization function for `feeder_call_gas`.
+// Serializes `u64` as a string to bypass `i64::MAX` limitations in TOML
+// parsing.
+fn serialize_feeder_call_gas<S>(
+    value: &u64,
+    serializer: S,
+) -> Result<S::Ok, S::Error>
+where
+    S: Serializer,
+{
+    serializer.serialize_str(&value.to_string())
+}
+
 impl Default for HttpConfig {
     fn default() -> Self {
         Self {
@@ -119,7 +154,7 @@ mod vec_header_map {
         struct TupleVecVisitor;
 
         impl<'de> Visitor<'de> for TupleVecVisitor {
-            type Value = Vec<(&'de str, &'de str)>;
+            type Value = Vec<(String, String)>;
 
             fn expecting(&self, formatter: &mut fmt::Formatter) -> fmt::Result {
                 formatter.write_str("a tuple header name and value")
@@ -146,7 +181,7 @@ mod vec_header_map {
         for (k, v) in tuple_vec {
             let name = HeaderName::from_bytes(k.as_bytes())
                 .map_err(D::Error::custom)?;
-            let value = HeaderValue::from_str(v).map_err(D::Error::custom)?;
+            let value = HeaderValue::from_str(&v).map_err(D::Error::custom)?;
             headers.insert(name, value);
         }
 
@@ -179,12 +214,23 @@ mod tests {
     #[test]
     fn deserialize_config() {
         let config_str = r#"listen = true
-                            feeder_call_gas = 18446744
+                            feeder_call_gas = "18446744"
                             ws_sub_channel_cap = 16
                             ws_event_channel_cap = 1024
                             headers = [["name1", "value1"], ["name2", "value2"]]"#;
 
         toml::from_str::<HttpConfig>(config_str)
             .expect("deserializing config should succeed");
     }
+
+    #[test]
+    fn deserialize_invalid_feeder_call_gas() {
+        let config_str = r#"feeder_call_gas = "invalid_number""#;
+        let result = toml::from_str::<HttpConfig>(config_str);
+        assert!(result.is_err());
+
+        let config_str = r#"feeder_call_gas = 18446744"#;
+        let result = toml::from_str::<HttpConfig>(config_str);
+        assert!(result.is_err());
+    }
 }