EIP-1014 Skinny CREATE2

ethereumj-core/src/main/java/org/ethereum/config/BlockchainConfig.java

@@ -181,4 +181,10 @@ String validateTransactionChanges(BlockStore blockStore, Block curBlock, Transac
      * Net gas metering for SSTORE without dirty maps
      */
     boolean eip1283();
+
+    /**
+     * EIP 1014: https://eips.ethereum.org/EIPS/eip-1014
+     * Skinny CREATE2: same as CREATE but with deterministic address
+     */
+    boolean eip1014();
 }

ethereumj-core/src/main/java/org/ethereum/config/blockchain/AbstractConfig.java

@@ -208,6 +208,11 @@ public boolean eip1283() {
         return false;
     }
 
+    @Override
+    public boolean eip1014() {
+        return false;
+    }
+
     @Override
     public String toString() {
         return getClass().getSimpleName();

ethereumj-core/src/main/java/org/ethereum/config/blockchain/ConstantinopleConfig.java

@@ -25,7 +25,7 @@
  *     <li>145  - Bitwise shifting instructions in EVM</li>
  *     <li>1014 - Skinny CREATE2</li>
  *     <li>1052 - EXTCODEHASH opcode</li>
- *     <li>1087 - Net gas metering for SSTORE operations</li>
+ *     <li>1283 - Net gas metering for SSTORE without dirty maps</li>
  * </ul>
  */
 public class ConstantinopleConfig extends ByzantiumConfig {
@@ -48,4 +48,9 @@ public boolean eip145() {
     public boolean eip1283() {
         return true;
     }
+
+    @Override
+    public boolean eip1014() {
+        return true;
+    }
 }

ethereumj-core/src/main/java/org/ethereum/config/blockchain/Eip150HFConfig.java

@@ -196,4 +196,9 @@ public boolean eip1052() {
     public boolean eip1283() {
         return false;
     }
+
+    @Override
+    public boolean eip1014() {
+        return false;
+    }
 }

ethereumj-core/src/main/java/org/ethereum/core/Transaction.java

@@ -360,6 +360,7 @@ public ECDSASignature getSignature() {
 
     public byte[] getContractAddress() {
         if (!isContractCreation()) return null;
+        // TODO: CREATE2 ??
         return HashUtil.calcNewAddr(this.getSender(), this.getNonce());
     }
 

ethereumj-core/src/main/java/org/ethereum/crypto/HashUtil.java

@@ -35,6 +35,8 @@
 
 import static java.util.Arrays.copyOfRange;
 import static org.ethereum.util.ByteUtil.EMPTY_BYTE_ARRAY;
+import static org.ethereum.util.ByteUtil.bigIntegerToBytes;
+import static org.ethereum.util.ByteUtil.bytesToBigInteger;
 
 public class HashUtil {
 
@@ -182,6 +184,30 @@ public static byte[] calcNewAddr(byte[] addr, byte[] nonce) {
         return sha3omit12(RLP.encodeList(encSender, encNonce));
     }
 
+    /**
+     * The way to calculate new address inside ethereum for {@link org.ethereum.vm.OpCode#CREATE2}
+     * sha3(0xff ++ msg.sender ++ salt ++ sha3(init_code)))[12:]
+     *
+     * @param senderAddr - creating address
+     * @param initCode - contract init code
+     * @param salt - salt to make different result addresses
+     * @return new address
+     */
+    public static byte[] calcSaltAddr(byte[] senderAddr, byte[] initCode, byte[] salt) {
+        // 1 - 0xff length, 32 bytes - keccak-256
+        byte[] data = new byte[1 + senderAddr.length + salt.length + 32];
+        data[0] = (byte) 0xff;
+        int currentOffset = 1;
+        System.arraycopy(senderAddr, 0, data, currentOffset, senderAddr.length);
+        currentOffset += senderAddr.length;
+        System.arraycopy(salt, 0, data, currentOffset, salt.length);
+        currentOffset += salt.length;
+        byte[] sha3InitCode = sha3(initCode);
+        System.arraycopy(sha3InitCode, 0, data, currentOffset, sha3InitCode.length);
+
+        return sha3omit12(data);
+    }
+
     /**
      * @see #doubleDigest(byte[], int, int)
      *

ethereumj-core/src/main/java/org/ethereum/vm/OpCode.java

@@ -612,6 +612,11 @@ public enum OpCode {
      */
     DELEGATECALL(0xf4, 6, 1, SpecialTier, CallFlags.Call, CallFlags.Stateless, CallFlags.Delegate),
 
+    /**
+     * (0xf5) Skinny CREATE2, same as CREATE but with deterministic address
+     */
+    CREATE2(0xf5, 4, 1, SpecialTier),
+
     /**
      *  opcode that can be used to call another contract (or itself) while disallowing any
      *  modifications to the state during the call (and its subcalls, if present).

ethereumj-core/src/main/java/org/ethereum/vm/VM.java

@@ -110,6 +110,7 @@ public class VM {
         put(SHL, BlockchainConfig::eip145);
         put(SHR, BlockchainConfig::eip145);
         put(SAR, BlockchainConfig::eip145);
+        put(CREATE2, BlockchainConfig::eip1014);
     }};
 
     private final SystemProperties config;
@@ -388,6 +389,10 @@ else if (!currentValue.isZero() && newValue.isZero()) {
                     gasCost = gasCosts.getCREATE() + calcMemGas(gasCosts, oldMemSize,
                             memNeeded(stack.get(stack.size() - 2), stack.get(stack.size() - 3)), 0);
                     break;
+                case CREATE2:
+                    gasCost = gasCosts.getCREATE() + calcMemGas(gasCosts, oldMemSize,
+                            memNeeded(stack.get(stack.size() - 2), stack.get(stack.size() - 3)), 0);
+                    break;
                 case LOG0:
                 case LOG1:
                 case LOG2:
@@ -1279,6 +1284,25 @@ else if (!currentValue.isZero() && newValue.isZero()) {
                     program.step();
                 }
                 break;
+                case CREATE2: {
+                    if (program.isStaticCall()) throw new Program.StaticCallModificationException();
+
+                    DataWord value = program.stackPop();
+                    DataWord inOffset = program.stackPop();
+                    DataWord inSize = program.stackPop();
+                    DataWord salt = program.stackPop();
+
+                    if (logger.isInfoEnabled())
+                        logger.info(logString, String.format("%5s", "[" + program.getPC() + "]"),
+                                String.format("%-12s", op.name()),
+                                program.getGas().value(),
+                                program.getCallDeep(), hint);
+
+                    program.createContract2(value, inOffset, inSize, salt);
+
+                    program.step();
+                }
+                break;
                 case CALL:
                 case CALLCODE:
                 case DELEGATECALL:

ethereumj-core/src/main/java/org/ethereum/vm/program/Program.java

@@ -401,25 +401,76 @@ public Repository getStorage() {
         return this.storage;
     }
 
-    @SuppressWarnings("ThrowableResultOfMethodCallIgnored")
+    /**
+     * Create contract for {@link OpCode#CREATE}
+     * @param value         Endowment
+     * @param memStart      Code memory offset
+     * @param memSize       Code memory size
+     */
     public void createContract(DataWord value, DataWord memStart, DataWord memSize) {
         returnDataBuffer = null; // reset return buffer right before the call
 
+        byte[] senderAddress = this.getOwnerAddress().getLast20Bytes();
+        BigInteger endowment = value.value();
+        if (!verifyCall(senderAddress, endowment))
+            return;;
+
+        byte[] nonce = getStorage().getNonce(senderAddress).toByteArray();
+        byte[] contractAddress = HashUtil.calcNewAddr(senderAddress, nonce);
+
+        byte[] programCode = memoryChunk(memStart.intValue(), memSize.intValue());
+        createContractImpl(value, programCode, contractAddress);
+    }
+
+    /**
+     * Create contract for {@link OpCode#CREATE2}
+     * @param value         Endowment
+     * @param memStart      Code memory offset
+     * @param memSize       Code memory size
+     * @param salt          Salt, used in contract address calculation
+     */
+    public void createContract2(DataWord value, DataWord memStart, DataWord memSize, DataWord salt) {
+        returnDataBuffer = null; // reset return buffer right before the call
+
+        byte[] senderAddress = this.getOwnerAddress().getLast20Bytes();
+        BigInteger endowment = value.value();
+        if (!verifyCall(senderAddress, endowment))
+            return;;
+
+        byte[] programCode = memoryChunk(memStart.intValue(), memSize.intValue());
+        byte[] contractAddress = HashUtil.calcSaltAddr(senderAddress, programCode, salt.getData());
+
+        createContractImpl(value, programCode, contractAddress);
+    }
+
+    /**
+     * Verifies CREATE attempt
+     */
+    private boolean verifyCall(byte[] senderAddress, BigInteger endowment) {
         if (getCallDeep() == MAX_DEPTH) {
             stackPushZero();
-            return;
+            return false;
         }
 
-        byte[] senderAddress = this.getOwnerAddress().getLast20Bytes();
-        BigInteger endowment = value.value();
         if (isNotCovers(getStorage().getBalance(senderAddress), endowment)) {
             stackPushZero();
-            return;
+            return false;
         }
 
-        // [1] FETCH THE CODE FROM THE MEMORY
-        byte[] programCode = memoryChunk(memStart.intValue(), memSize.intValue());
+        return true;
+    }
 
+    /**
+     * All stages required to create contract on provided address after initial check
+     * @param value         Endowment
+     * @param programCode   Contract code
+     * @param newAddress    Contract address
+     */
+    @SuppressWarnings("ThrowableResultOfMethodCallIgnored")
+    private void createContractImpl(DataWord value, byte[] programCode, byte[] newAddress) {
+
+        // [1] LOG, SPEND GAS
+        byte[] senderAddress = this.getOwnerAddress().getLast20Bytes();
         if (logger.isInfoEnabled())
             logger.info("creating a new contract inside contract run: [{}]", toHexString(senderAddress));
 
@@ -429,9 +480,6 @@ public void createContract(DataWord value, DataWord memStart, DataWord memSize)
         spendGas(gasLimit.longValue(), "internal call");
 
         // [2] CREATE THE CONTRACT ADDRESS
-        byte[] nonce = getStorage().getNonce(senderAddress).toByteArray();
-        byte[] newAddress = HashUtil.calcNewAddr(getOwnerAddress().getLast20Bytes(), nonce);
-
         AccountState existingAddr = getStorage().getAccountState(newAddress);
         boolean contractAlreadyExists = existingAddr != null && existingAddr.isContractExist(blockchainConfig);
 
@@ -459,6 +507,7 @@ public void createContract(DataWord value, DataWord memStart, DataWord memSize)
         track.addBalance(newAddress, oldBalance);
 
         // [4] TRANSFER THE BALANCE
+        BigInteger endowment = value.value();
         BigInteger newBalance = ZERO;
         if (!byTestingSuite()) {
             track.addBalance(senderAddress, endowment.negate());
@@ -467,6 +516,7 @@ public void createContract(DataWord value, DataWord memStart, DataWord memSize)
 
 
         // [5] COOK THE INVOKE AND EXECUTE
+        byte[] nonce = getStorage().getNonce(senderAddress).toByteArray();
         InternalTransaction internalTx = addInternalTx(nonce, getGasLimit(), senderAddress, null, endowment, programCode, "create");
         ProgramInvoke programInvoke = programInvokeFactory.createProgramInvoke(
                 this, DataWord.of(newAddress), getOwnerAddress(), value, gasLimit,

ethereumj-core/src/test/java/org/ethereum/crypto/CryptoTest.java

@@ -45,6 +45,7 @@
 import java.security.SecureRandom;
 
 import static org.ethereum.crypto.HashUtil.sha3;
+import static org.junit.Assert.assertArrayEquals;
 import static org.junit.Assert.assertEquals;
 
 public class CryptoTest {
@@ -366,4 +367,14 @@ public byte[] getEncoded(AsymmetricKeyParameter keyParameter)
         log.info("orig: " + Hex.toHexString(orig));
     }
 
+    @Test
+    public void calcSaltAddrTest() {
+        byte[] from = Hex.decode("0123456789012345678901234567890123456789");
+        byte[] salt = Hex.decode("0000000000000000000000000000000000000000000000000000000000000314");
+        // contract Demo{}
+        byte[] code = Hex.decode("6080604052348015600f57600080fd5b50603580601d6000396000f3006080604052600080fd00a165627a7a72305820a63607f79a5e21cdaf424583b9686f2aa44059d70183eb9846ccfa086405716e0029");
+
+        assertArrayEquals(Hex.decode("d26e42c8a0511c19757f783402231cf82b2bdf59"), HashUtil.calcSaltAddr(from, code, salt));
+    }
+
 }

ethereumj-core/src/test/java/org/ethereum/jsontestsuite/GitHubBlockStateTest.java

@@ -328,4 +328,19 @@ public void stShiftTest() throws IOException {
 //        String treeSHA = "8457a6a49f53218575a349abc311c55939797bff";
 //           targetNets += GitHubJSONTestSuite.Network.Constantinople
     }
+
+    @Test
+    @Ignore("Update after all tests could pass latest develop")
+    public void stCreate2Test() throws IOException {
+        suite.runAll("stCreate2");
+// TODO: Update all, this one passes with following settings:
+//        String commitSHA = "e2d84e1c00289bc259ad631efb6b42390e6a291a";
+//        String treeSHA = "d74573a79cf607744759acde258bf7c3cf849bf1";
+//           targetNets += GitHubJSONTestSuite.Network.Constantinople
+
+        // TODO: fix test
+//        String commit = "e2d84e1c00289bc259ad631efb6b42390e6a291a";
+//        String filePath = "GeneralStateTests/stCreate2/create2collisionStorage_d1g0v0.json";
+//        BlockchainTestSuite.runSingle(filePath, commit, GitHubJSONTestSuite.Network.Constantinople);
+    }
 }

ethereumj-core/src/test/java/org/ethereum/jsontestsuite/GitHubStateTest.java

@@ -330,5 +330,21 @@ public void stShiftTest() throws IOException {
 //        String treeSha = "4dd59a4f448dc06c3641bd5cb9c35cf6a099e438";
 //           targetNets += GitHubJSONTestSuite.Network.Constantinople
     }
+
+    @Test
+    @Ignore("Update after all tests could pass latest develop")
+    public void stCreate2Test() throws IOException {
+        suite.runAll("stCreate2");
+// TODO: Update all, this one passes with following settings:
+//        String commitSHA = "e2d84e1c00289bc259ad631efb6b42390e6a291a";
+//        String treeSHA = "a0de4e26471485201d279792d057f3576f76a0c4";
+//           targetNets += GitHubJSONTestSuite.Network.Constantinople
+
+        // TODO: FIX create2collisionStorage_Constantinople_2
+//        String commitSHA = "e2d84e1c00289bc259ad631efb6b42390e6a291a";
+//        String filePath = "stCreate2/create2collisionStorage.json";
+//        GeneralStateTestSuite.runSingle(filePath, commitSHA, GitHubJSONTestSuite.Network.Constantinople);
+
+    }
 }
 

ethereumj-core/src/test/java/org/ethereum/jsontestsuite/suite/BlockTestCase.java

@@ -39,6 +39,7 @@ public class BlockTestCase {
     private String lastblockhash;
     private int noBlockChainHistory;
     private GitHubJSONTestSuite.Network network;
+    private SealEngine sealEngine = SealEngine.Ethash;
 
     public BlockTestCase() {
     }
@@ -115,6 +116,14 @@ public BlockchainNetConfig getConfig() {
         return network.getConfig();
     }
 
+    public SealEngine getSealEngine() {
+        return sealEngine;
+    }
+
+    public void setSealEngine(SealEngine sealEngine) {
+        this.sealEngine = sealEngine;
+    }
+
     @Override
     public String toString() {
         return "BlockTestCase{" +
@@ -123,4 +132,9 @@ public String toString() {
                 ", pre=" + pre +
                 '}';
     }
+
+    enum SealEngine {
+        NoProof,  // blocks in the test should not be checked for difficulty
+        Ethash
+    }
 }

ethereumj-core/src/test/java/org/ethereum/jsontestsuite/suite/TestRunner.java

@@ -159,9 +159,13 @@ public List<String> runTestCase(BlockTestCase testCase) {
 
         byte[] bestHash = Hex.decode(testCase.getLastblockhash().startsWith("0x") ?
                 testCase.getLastblockhash().substring(2) : testCase.getLastblockhash());
-        String finalRoot = Hex.toHexString(blockStore.getBlockByHash(bestHash).getStateRoot());
 
-        if (!finalRoot.equals(currRoot)){
+        String finalRoot = null;
+        if (blockStore.getBlockByHash(bestHash) != null) {
+            finalRoot = Hex.toHexString(blockStore.getBlockByHash(bestHash).getStateRoot());
+        }
+
+        if (!currRoot.equals(finalRoot)){
             String formattedString = String.format("Root hash doesn't match best: expected: %s current: %s",
                     finalRoot, currRoot);
             results.add(formattedString);