evm: Upgradeable contracts

lib/ain-contracts/src/lib.rs

@@ -8,7 +8,10 @@ pub type Result<T> = std::result::Result<T, anyhow::Error>;
 
 pub const DST20_ADDR_PREFIX_BYTE: u8 = 0xff;
 pub const INTRINSICS_ADDR_PREFIX_BYTE: u8 = 0xdf;
-
+pub const IMPLEMENTATION_SLOT: H256 = H256([
+    0x36, 0x08, 0x94, 0xa1, 0x3b, 0xa1, 0xa3, 0x21, 0x06, 0x67, 0xc8, 0x28, 0x49, 0x2d, 0xb9, 0x8d,
+    0xca, 0x3e, 0x20, 0x76, 0xcc, 0x37, 0x35, 0xa9, 0x20, 0xa3, 0xca, 0x50, 0x5d, 0x38, 0x2b, 0xbc,
+]);
 macro_rules! solc_artifact_path {
     ($project_name:literal, $artifact:literal) => {
         concat!(
@@ -103,8 +106,6 @@ pub struct FixedContract {
 }
 
 lazy_static::lazy_static! {
-    pub static ref IMPLEMENTATION_SLOT: H256 = H256::from_str("0x360894a13ba1a3210667c828492db98dca3e2076cc3735a920a3ca505d382bbc").unwrap();
-
     pub static ref DFI_RESERVED_CONTRACT: Contract = {
         let bytecode = solc_artifact_bytecode_str!(
             "dfi_reserved",

lib/ain-evm/src/contract.rs

@@ -143,7 +143,7 @@ pub fn transfer_domain_deploy_info(implementation_address: H160) -> Result<Deplo
     Ok(DeployContractInfo {
         address: fixed_address,
         bytecode: Bytes::from(contract.runtime_bytecode),
-        storage: vec![(*IMPLEMENTATION_SLOT, h160_to_h256(implementation_address))],
+        storage: vec![(IMPLEMENTATION_SLOT, h160_to_h256(implementation_address))],
     })
 }
 
@@ -185,7 +185,7 @@ pub fn dst20_deploy_info(
         (H256::from_low_u64_be(3), get_abi_encoded_string(name)),
         (H256::from_low_u64_be(4), get_abi_encoded_string(symbol)),
         (
-            *IMPLEMENTATION_SLOT,
+            IMPLEMENTATION_SLOT,
             h160_to_h256(get_dst20_v1_contract().fixed_address),
         ),
     ];