Emerge Yul recompiler (#1)

Provide a modified (and incomplete) version of ZKSync zksolc that can compile the most basic contracts

crates/solidity/src/solc/standard_json/input/settings/metadata.rs

@@ -0,0 +1,28 @@
+//!
+//! The `solc --standard-json` input settings metadata.
+//!
+
+use serde::Deserialize;
+use serde::Serialize;
+
+///
+/// The `solc --standard-json` input settings metadata.
+///
+#[derive(Debug, Default, Serialize, Deserialize)]
+#[serde(rename_all = "camelCase")]
+pub struct Metadata {
+    /// The bytecode hash mode.
+    #[serde(skip_serializing_if = "Option::is_none")]
+    pub bytecode_hash: Option<era_compiler_llvm_context::EraVMMetadataHash>,
+}
+
+impl Metadata {
+    ///
+    /// A shortcut constructor.
+    ///
+    pub fn new(bytecode_hash: era_compiler_llvm_context::EraVMMetadataHash) -> Self {
+        Self {
+            bytecode_hash: Some(bytecode_hash),
+        }
+    }
+}