chore(meta): add evm precompiles

meta/meta-runtime/Cargo.toml

@@ -41,6 +41,9 @@ pallet-dynamic-fee 							= { default-features = false, git = "https://github.co
 pallet-ethereum 							= { default-features = false, git = "https://github.com/paritytech/frontier.git", branch = "polkadot-v0.9.27" }
 pallet-evm 									= { default-features = false, git = "https://github.com/paritytech/frontier.git", branch = "polkadot-v0.9.27" }
 pallet-evm-chain-id							= { default-features = false, git = "https://github.com/paritytech/frontier.git", branch = "polkadot-v0.9.27" }
+pallet-evm-precompile-modexp				= { default-features = false, git = "https://github.com/paritytech/frontier.git", branch = "polkadot-v0.9.27" }
+pallet-evm-precompile-sha3fips				= { default-features = false, git = "https://github.com/paritytech/frontier.git", branch = "polkadot-v0.9.27" }
+pallet-evm-precompile-simple				= { default-features = false, git = "https://github.com/paritytech/frontier.git", branch = "polkadot-v0.9.27" }
 
 [build-dependencies]
 substrate-wasm-builder 						= { default-features = false, git = "https://github.com/paritytech/substrate.git", branch = "polkadot-v0.9.27" }
@@ -81,6 +84,9 @@ std = [
 	"pallet-ethereum/std",
 	"pallet-evm/std",
 	"pallet-evm-chain-id/std",
+	"pallet-evm-precompile-modexp/std",
+	"pallet-evm-precompile-sha3fips/std",
+	"pallet-evm-precompile-simple/std",
 	"pallet-sudo/std",
 	"pallet-timestamp/std",
 	"pallet-transaction-payment/std",

meta/meta-runtime/src/lib.rs

@@ -48,6 +48,9 @@ use pallet_transaction_payment::CurrencyAdapter;
 pub use sp_runtime::BuildStorage;
 pub use sp_runtime::{Perbill, Permill};
 
+mod precompiles;
+use precompiles::FrontierPrecompiles;
+
 #[cfg(test)]
 mod mock;
 #[cfg(test)]
@@ -239,6 +242,7 @@ impl GasWeightMapping for FixedGasWeightMapping {
 
 parameter_types! {
 	pub BlockGasLimit: U256 = U256::from(NORMAL_DISPATCH_RATIO * MAXIMUM_BLOCK_WEIGHT / WEIGHT_PER_GAS);
+	pub PrecompilesValue: FrontierPrecompiles<Runtime> = FrontierPrecompiles::<_>::new();
 }
 
 impl pallet_evm::Config for Runtime {
@@ -251,8 +255,8 @@ impl pallet_evm::Config for Runtime {
 	type Currency = Balances;
 	type Event = Event;
 	type Runner = pallet_evm::runner::stack::Runner<Self>;
-	type PrecompilesType = ();
-	type PrecompilesValue = ();
+	type PrecompilesType = FrontierPrecompiles<Self>;
+	type PrecompilesValue = PrecompilesValue;
 	type ChainId = EVMChainId;
 	type BlockGasLimit = BlockGasLimit;
 	type OnChargeTransaction = ();

meta/meta-runtime/src/precompiles.rs

@@ -0,0 +1,56 @@
+use pallet_evm::{Precompile, PrecompileHandle, PrecompileResult, PrecompileSet};
+use sp_core::H160;
+use sp_std::marker::PhantomData;
+
+use pallet_evm_precompile_modexp::Modexp;
+use pallet_evm_precompile_sha3fips::Sha3FIPS256;
+use pallet_evm_precompile_simple::{ECRecover, ECRecoverPublicKey, Identity, Ripemd160, Sha256};
+
+pub struct FrontierPrecompiles<R>(PhantomData<R>);
+
+impl<R> FrontierPrecompiles<R>
+where
+	R: pallet_evm::Config,
+{
+	pub fn new() -> Self {
+		Self(Default::default())
+	}
+	pub fn used_addresses() -> [H160; 7] {
+		[
+			hash(1),
+			hash(2),
+			hash(3),
+			hash(4),
+			hash(5),
+			hash(1024),
+			hash(1025),
+		]
+	}
+}
+impl<R> PrecompileSet for FrontierPrecompiles<R>
+where
+	R: pallet_evm::Config,
+{
+	fn execute(&self, handle: &mut impl PrecompileHandle) -> Option<PrecompileResult> {
+		match handle.code_address() {
+			// Ethereum precompiles :
+			a if a == hash(1) => Some(ECRecover::execute(handle)),
+			a if a == hash(2) => Some(Sha256::execute(handle)),
+			a if a == hash(3) => Some(Ripemd160::execute(handle)),
+			a if a == hash(4) => Some(Identity::execute(handle)),
+			a if a == hash(5) => Some(Modexp::execute(handle)),
+			// Non-Frontier specific nor Ethereum precompiles :
+			a if a == hash(1024) => Some(Sha3FIPS256::execute(handle)),
+			a if a == hash(1025) => Some(ECRecoverPublicKey::execute(handle)),
+			_ => None,
+		}
+	}
+
+	fn is_precompile(&self, address: H160) -> bool {
+		Self::used_addresses().contains(&address)
+	}
+}
+
+fn hash(a: u64) -> H160 {
+	H160::from_low_u64_be(a)
+}