rename target to polkavm

Signed-off-by: xermicus <cyrill@parity.io>

crates/llvm-context/src/polkavm/metadata_hash.rs

@@ -0,0 +1,29 @@
+//! The metadata hash mode.
+
+use std::str::FromStr;
+
+use serde::Deserialize;
+use serde::Serialize;
+
+/// The metadata hash mode.
+#[derive(Debug, Serialize, Deserialize, Clone, Copy, PartialEq, Eq, Hash)]
+pub enum MetadataHash {
+    /// Do not include bytecode hash.
+    #[serde(rename = "none")]
+    None,
+    /// The default keccak256 hash.
+    #[serde(rename = "keccak256")]
+    Keccak256,
+}
+
+impl FromStr for MetadataHash {
+    type Err = anyhow::Error;
+
+    fn from_str(string: &str) -> Result<Self, Self::Err> {
+        match string {
+            "none" => Ok(Self::None),
+            "keccak256" => Ok(Self::Keccak256),
+            _ => anyhow::bail!("Unknown bytecode hash mode: `{}`", string),
+        }
+    }
+}