Remove nomad related code.

Cargo.toml

@@ -4,10 +4,6 @@ members = [
 	"core",
 	"kate/recovery",
 	"kate",
-	"nomad/signature",
-	"nomad/core",
-	"nomad/base",
-	"nomad/merkle",
 ]
 
 [profile.dev.package]

core/Cargo.toml

@@ -16,7 +16,6 @@ serde = { version = "1.0.196", default-features = false, features = ["derive", "
 static_assertions = { version = "1.1.0" }
 thiserror-no-std = { version = "2.0.2" }
 
-nomad-core = {path = "../nomad/core", default-features = false}
 tiny-keccak = { version = "2.0.2", default-features = false, features = ["keccak"] }
 
 
@@ -50,7 +49,6 @@ std = [
 	"hash256-std-hasher/std",
 	"hex",
 	"log/std",
-	"nomad-core/std",
 	"scale-info/std",
 	"serde/std",
 	"sp-arithmetic/std",

core/src/data_proof_v2.rs

@@ -1,10 +1,10 @@
 #[cfg(feature = "runtime")]
+use crate::keccak256_concat;
+#[cfg(feature = "runtime")]
 use binary_merkle_tree::MerkleProof;
 use codec::{Decode, Encode};
 use ethabi::{encode, Token};
 use frame_support::BoundedVec;
-#[cfg(feature = "runtime")]
-use nomad_core::keccak256_concat;
 use scale_info::TypeInfo;
 #[cfg(feature = "serde")]
 use serde::{Deserialize, Serialize};

core/src/lib.rs

@@ -168,3 +168,31 @@ macro_rules! ensure {
 		}
 	}};
 }
+
+/// Variadic macro used by `keccak256_concat` internally.
+#[macro_export]
+macro_rules! keccak256_concat_update {
+	($hasher:ident, $e:expr) => {{
+		$hasher.update($e.as_ref());
+	}};
+
+	($hasher:ident, $e:expr, $($es:expr),+) => {{
+		$hasher.update($e.as_ref());
+		$crate::keccak256_concat_update!($hasher, $($es),+);
+	}};
+}
+
+/// Calculates the Kecck 256 of arguments with NO extra allocations to join inputs.
+#[macro_export]
+macro_rules! keccak256_concat{
+	($($arg:tt)*) => {{
+		{
+			use tiny_keccak::Hasher as _;
+			let mut output = [0u8; 32];
+			let mut hasher = tiny_keccak::Keccak::v256();
+			$crate::keccak256_concat_update!(hasher, $($arg)*);
+			hasher.finalize(&mut output);
+			sp_core::H256::from(output)
+		}
+	}}
+}