Add function to resolve eth address to actor id (#176)

* feat: add function to resolve eth address to actor id
* fix: correct typo

contracts/v0.8/PrecompilesAPI.sol

@@ -36,6 +36,17 @@ library PrecompilesAPI {
         return uint64(actor_id);
     }
 
+    function resolveEthAddress(bytes memory addr) internal view returns (uint64) {
+        bytes memory delegatedAddr = abi.encodePacked(hex"040a", addr);
+
+        (bool success, bytes memory raw_response) = address(RESOLVE_ADDRESS_PRECOMPILE_ADDR).staticcall(delegatedAddr);
+        require(success == true, "resolve eth address error");
+
+        uint256 actor_id = abi.decode(raw_response, (uint256));
+
+        return uint64(actor_id);
+    }
+
     function lookupDelegatedAddress(uint64 actor_id) internal view returns (bytes memory) {
         (bool success, bytes memory raw_response) = address(LOOKUP_DELEGATED_ADDRESS_PRECOMPILE_ADDR).staticcall(
             abi.encodePacked(uint256(actor_id))

contracts/v0.8/tests/precompiles.test.sol

@@ -27,6 +27,10 @@ contract PrecompilesApiTest {
         return PrecompilesAPI.resolveAddress(addr);
     }
 
+    function resolve_eth_address(bytes memory addr) public view returns (uint64) {
+        return PrecompilesAPI.resolveEthAddress(addr);
+    }
+
     function lookup_delegated_address(uint64 actor_id) public view returns (bytes memory) {
         return PrecompilesAPI.lookupDelegatedAddress(actor_id);
     }

testing/tests/precompiles.rs

@@ -206,5 +206,24 @@ mod tests {
         assert_eq!(res.msg_receipt.exit_code.value(), 0);
         assert_eq!(hex::encode(res.msg_receipt.return_data.bytes()), "5860000000000000000000000000000000000000000000000000000000000000002000000000000000000000000000000000000000000000000000000000000000200000000000000000000000001b8cf5bc0e542a1620184208f78c0cff516cce96");
 
+        println!("Calling `resolve_eth_address`");
+
+        let message = Message {
+            from: sender[0].1,
+            to: Address::new_id(contract_actor_id),
+            gas_limit: 1000000000,
+            method_num: EvmMethods::InvokeContract as u64,
+            sequence: 6,
+            params: RawBytes::new(hex::decode("58640D6B2CE40000000000000000000000000000000000000000000000000000000000000020000000000000000000000000000000000000000000000000000000000000001476C499BE8821B5B9860144D292FFF728611BFD1A000000000000000000000000").unwrap()),
+            ..Message::default()
+        };
+
+        let res = executor
+            .execute_message(message, ApplyKind::Explicit, 100)
+            .unwrap();
+
+        assert_eq!(res.msg_receipt.exit_code.value(), 0);
+        assert_eq!(hex::encode(res.msg_receipt.return_data.bytes()), "58200000000000000000000000000000000000000000000000000000000000000191");
+
     }
 }