init of subxt-core crate

core/src/client/mod.rs

@@ -0,0 +1,51 @@
+use derivative::Derivative;
+
+use crate::{config::Config, metadata::Metadata};
+
+/// the base for a client should be:
+/// - runtime version
+/// - genesis hash
+/// - metadata
+
+#[derive(Derivative)]
+#[derivative(Debug(bound = ""))]
+pub struct MinimalClient<C: Config> {
+    pub genesis_hash: C::Hash,
+    pub runtime_version: RuntimeVersion,
+    pub metadata: Metadata,
+    marker: core::marker::PhantomData<C>,
+}
+
+impl<C: Config> MinimalClient<C> {
+    pub fn metadata(&self) -> Metadata {
+        self.metadata.clone()
+    }
+
+    pub fn runtime_version(&self) -> RuntimeVersion {
+        self.runtime_version
+    }
+
+    pub fn genesis_hash(&self) -> C::Hash {
+        self.genesis_hash
+    }
+}
+
+/// Runtime version information needed to submit transactions.
+#[derive(Debug, Clone, Copy, PartialEq, Eq)]
+pub struct RuntimeVersion {
+    /// Version of the runtime specification. A full-node will not attempt to use its native
+    /// runtime in substitute for the on-chain Wasm runtime unless all of `spec_name`,
+    /// `spec_version` and `authoring_version` are the same between Wasm and native.
+    pub spec_version: u32,
+
+    /// All existing dispatches are fully compatible when this number doesn't change. If this
+    /// number changes, then `spec_version` must change, also.
+    ///
+    /// This number must change when an existing dispatchable (module ID, dispatch ID) is changed,
+    /// either through an alteration in its user-level semantics, a parameter
+    /// added/removed/changed, a dispatchable being removed, a module being removed, or a
+    /// dispatchable/module changing its index.
+    ///
+    /// It need *not* change when a new module is added or when a dispatchable is added.
+    pub transaction_version: u32,
+}