Switch to precompile-utils for precompiles

runtime/Cargo.toml

@@ -100,6 +100,7 @@ pallet-commitments = { default-features = false, path = "../pallets/commitments"
 fp-evm = { workspace = true }
 fp-rpc = { workspace = true }
 fp-self-contained = { workspace = true }
+precompile-utils = { workspace = true }
 
 # Frontier FRAME
 pallet-base-fee = { workspace = true }
@@ -163,6 +164,7 @@ std = [
 	"pallet-scheduler/std",
 	"pallet-preimage/std",
 	"pallet-commitments/std",
+	"precompile-utils/std",
 	"sp-api/std",
 	"sp-block-builder/std",
 	"sp-consensus-aura/std",

runtime/src/lib.rs

@@ -229,7 +229,7 @@ pub const VERSION: RuntimeVersion = RuntimeVersion {
     //   `spec_version`, and `authoring_version` are the same between Wasm and native.
     // This value is set to 100 to notify Polkadot-JS App (https://polkadot.js.org/apps) to use
     //   the compatible custom types.
-    spec_version: 239,
+    spec_version: 240,
     impl_version: 1,
     apis: RUNTIME_API_VERSIONS,
     transaction_version: 1,

runtime/src/precompiles/balance_transfer.rs

@@ -1,60 +1,40 @@
-use pallet_evm::{
-    BalanceConverter, ExitError, ExitSucceed, PrecompileHandle, PrecompileOutput, PrecompileResult,
-};
+use pallet_evm::PrecompileHandle;
+use precompile_utils::EvmResult;
+use sp_core::H256;
 use sp_runtime::traits::UniqueSaturatedInto;
-use sp_std::vec;
 
-use crate::precompiles::{
-    contract_to_origin, get_method_id, get_pubkey, get_slice, try_dispatch_runtime_call,
-};
+use crate::precompiles::{contract_to_origin, parse_pubkey, PrecompileExt, PrecompileHandleExt};
 use crate::Runtime;
 
-pub const BALANCE_TRANSFER_INDEX: u64 = 2048;
-// ss58 public key i.e., the contract sends funds it received to the destination address from the
-// method parameter.
-const CONTRACT_ADDRESS_SS58: [u8; 32] = [
-    0x07, 0xec, 0x71, 0x2a, 0x5d, 0x38, 0x43, 0x4d, 0xdd, 0x03, 0x3f, 0x8f, 0x02, 0x4e, 0xcd, 0xfc,
-    0x4b, 0xb5, 0x95, 0x1c, 0x13, 0xc3, 0x08, 0x5c, 0x39, 0x9c, 0x8a, 0x5f, 0x62, 0x93, 0x70, 0x5d,
-];
-
 pub struct BalanceTransferPrecompile;
 
-impl BalanceTransferPrecompile {
-    pub fn execute(handle: &mut impl PrecompileHandle) -> PrecompileResult {
-        let txdata = handle.input();
-
-        // Match method ID: keccak256("transfer(bytes32)")
-        let method = get_slice(txdata, 0, 4)?;
-        if get_method_id("transfer(bytes32)") != method {
-            return Ok(PrecompileOutput {
-                exit_status: ExitSucceed::Returned,
-                output: vec![],
-            });
-        }
-
-        // Forward all received value to the destination address
-        let amount = handle.context().apparent_value;
+impl PrecompileExt for BalanceTransferPrecompile {
+    const INDEX: u64 = 2048;
+    const ADDRESS_SS58: [u8; 32] = [
+        0x07, 0xec, 0x71, 0x2a, 0x5d, 0x38, 0x43, 0x4d, 0xdd, 0x03, 0x3f, 0x8f, 0x02, 0x4e, 0xcd,
+        0xfc, 0x4b, 0xb5, 0x95, 0x1c, 0x13, 0xc3, 0x08, 0x5c, 0x39, 0x9c, 0x8a, 0x5f, 0x62, 0x93,
+        0x70, 0x5d,
+    ];
+}
 
-        // Use BalanceConverter to convert EVM amount to Substrate balance
-        let amount_sub =
-            <Runtime as pallet_evm::Config>::BalanceConverter::into_substrate_balance(amount)
-                .ok_or(ExitError::OutOfFund)?;
+#[precompile_utils::precompile]
+impl BalanceTransferPrecompile {
+    #[precompile::public("transfer(bytes32)")]
+    #[precompile::payable]
+    fn transfer(handle: &mut impl PrecompileHandle, address: H256) -> EvmResult<()> {
+        let amount_sub = handle.try_convert_apparent_value()?;
 
         if amount_sub.is_zero() {
-            return Ok(PrecompileOutput {
-                exit_status: ExitSucceed::Returned,
-                output: vec![],
-            });
+            return Ok(());
         }
 
-        let address_bytes_dst = get_slice(txdata, 4, 36)?;
-        let (account_id_dst, _) = get_pubkey(address_bytes_dst)?;
+        let dest = parse_pubkey(address.as_bytes())?.0.into();
 
         let call = pallet_balances::Call::<Runtime>::transfer_allow_death {
-            dest: account_id_dst.into(),
+            dest,
             value: amount_sub.unique_saturated_into(),
         };
 
-        try_dispatch_runtime_call(handle, call, contract_to_origin(&CONTRACT_ADDRESS_SS58)?)
+        handle.try_dispatch_runtime_call(call, contract_to_origin(&Self::ADDRESS_SS58)?)
     }
 }

runtime/src/precompiles/ed25519.rs

@@ -2,14 +2,18 @@ extern crate alloc;
 
 use alloc::vec::Vec;
 
-use crate::precompiles::get_slice;
 use ed25519_dalek::{Signature, Verifier, VerifyingKey};
 use fp_evm::{ExitError, ExitSucceed, LinearCostPrecompile, PrecompileFailure};
 
-pub const EDVERIFY_PRECOMPILE_INDEX: u64 = 1026;
+use crate::precompiles::{parse_slice, PrecompileExt};
 
 pub struct Ed25519Verify;
 
+impl PrecompileExt for Ed25519Verify {
+    const INDEX: u64 = 1026;
+    const ADDRESS_SS58: [u8; 32] = [0; 32];
+}
+
 impl LinearCostPrecompile for Ed25519Verify {
     const BASE: u64 = 15;
     const WORD: u64 = 3;
@@ -23,13 +27,13 @@ impl LinearCostPrecompile for Ed25519Verify {
 
         let mut buf = [0u8; 32];
 
-        let msg = get_slice(input, 4, 36)?;
-        let pk = VerifyingKey::try_from(get_slice(input, 36, 68)?).map_err(|_| {
+        let msg = parse_slice(input, 4, 36)?;
+        let pk = VerifyingKey::try_from(parse_slice(input, 36, 68)?).map_err(|_| {
             PrecompileFailure::Error {
                 exit_status: ExitError::Other("Public key recover failed".into()),
             }
         })?;
-        let sig = Signature::try_from(get_slice(input, 68, 132)?).map_err(|_| {
+        let sig = Signature::try_from(parse_slice(input, 68, 132)?).map_err(|_| {
             PrecompileFailure::Error {
                 exit_status: ExitError::Other("Signature recover failed".into()),
             }