Examples with ECKey org.ethereum.crypto.ECKey used on opensource projects

Example 61 with ECKey

use of org.ethereum.crypto.ECKey in project rskj by rsksmart.

the class BlockGenerator method createFallbackMinedChildBlockWithTimeStamp.

public Block createFallbackMinedChildBlockWithTimeStamp(Block parent, byte[] difficulty, long timeStamp, boolean goodSig) {
    List<Transaction> txs = new ArrayList<>();
    Block block = new Block(// parent hash
    parent.getHash().getBytes(), // uncle hash
    EMPTY_LIST_HASH, parent.getCoinbase().getBytes(), ByteUtils.clone(new Bloom().getData()), // difficulty
    difficulty, parent.getNumber() + 1, parent.getGasLimit(), parent.getGasUsed(), timeStamp, // extraData
    EMPTY_BYTE_ARRAY, // mixHash
    EMPTY_BYTE_ARRAY, // provisory nonce
    BigInteger.ZERO.toByteArray(), // receipts root
    EMPTY_TRIE_HASH, // transaction root
    BlockChainImpl.calcTxTrie(txs), // EMPTY_TRIE_HASH,   // state root
    ByteUtils.clone(parent.getStateRoot()), // transaction list
    txs, // uncle list
    null, null, Coin.ZERO);
    ECKey fallbackMiningKey0 = ECKey.fromPrivate(BigInteger.TEN);
    ECKey fallbackMiningKey1 = ECKey.fromPrivate(BigInteger.TEN.add(BigInteger.ONE));
    ECKey fallbackKey;
    if (block.getNumber() % 2 == 0) {
        fallbackKey = fallbackMiningKey0;
    } else {
        fallbackKey = fallbackMiningKey1;
    }
    byte[] signature = fallbackSign(block.getHashForMergedMining(), fallbackKey);
    if (!goodSig) {
        // just make it a little bad
        signature[5] = (byte) (signature[5] + 1);
    }
    block.setBitcoinMergedMiningHeader(signature);
    return block;
}

Example 62 with ECKey

use of org.ethereum.crypto.ECKey in project rskj by rsksmart.

the class CodeReplaceTest method replaceCodeTest1.

@Test
public void replaceCodeTest1() throws IOException, InterruptedException {
    BigInteger nonce = config.getBlockchainConfig().getCommonConstants().getInitialNonce();
    BlockChainImpl blockchain = org.ethereum.core.ImportLightTest.createBlockchain(GenesisLoader.loadGenesis(config, nonce, getClass().getResourceAsStream("/genesis/genesis-light.json"), false));
    ECKey sender = ECKey.fromPrivate(Hex.decode("3ec771c31cac8c0dba77a69e503765701d3c2bb62435888d4ffa38fed60c445c"));
    System.out.println("address: " + Hex.toHexString(sender.getAddress()));
    String asm = // (7b) Extract real code into address 0, skip first 12 bytes, copy 20 bytes
    "0x14 0x0C 0x00 CODECOPY " + // (5b) offset 0, size 0x14, now return the first code
    "0x14 0x00  RETURN " + // (4b) header script v1
    "HEADER !0x01 !0x01 !0x00 " + // (3b) store at offset 0, read data from offset 0. Transfer 32 bytes
    "0x00 CALLDATALOAD " + // (3b) store the data at address 0
    "0x00 MSTORE " + // We replace TWO TIMES to make sure that only the last replacement takes place
    "0x01 0x00 CODEREPLACE " + // This is the good one.
    "0x10 0x00 CODEREPLACE";
    // (5b) set new code: offset 0, size 16 bytes.
    EVMAssembler assembler = new EVMAssembler();
    byte[] code = assembler.assemble(asm);
    // Creates a contract
    Transaction tx1 = createTx(blockchain, sender, new byte[0], code);
    executeTransaction(blockchain, tx1);
    // Now we can directly check the store and see the new code.
    RskAddress createdContract = tx1.getContractAddress();
    byte[] expectedCode = Arrays.copyOfRange(code, 12, 12 + 20);
    byte[] installedCode = blockchain.getRepository().getContractDetails(createdContract).getCode();
    // assert the contract has been created
    Assert.assertTrue(Arrays.equals(expectedCode, installedCode));
    // Note that this code does not have a header, then its version == 0
    String asm2 = // (5b) Store at address 0x00, the value 0xFF
    "0xFF 0x00 MSTORE " + // (5b) And return such value 0xFF, at offset 0x1F
    "0x01 0x1F RETURN " + // fill with nops to make it 16 bytes in length
    "STOP STOP STOP STOP STOP STOP";
    // 16
    byte[] code2 = assembler.assemble(asm2);
    // The second transaction changes the contract code
    Transaction tx2 = createTx(blockchain, sender, tx1.getContractAddress().getBytes(), code2);
    TransactionExecutor executor2 = executeTransaction(blockchain, tx2);
    byte[] installedCode2 = blockchain.getRepository().getContractDetails(createdContract).getCode();
    // assert the contract code has been created
    Assert.assertTrue(Arrays.equals(installedCode2, code2));
    // there is one code change
    Assert.assertEquals(1, executor2.getResult().getCodeChanges().size());
    // We could add a third tx to execute the new code
    Transaction tx3 = createTx(blockchain, sender, tx1.getContractAddress().getBytes(), new byte[0]);
    TransactionExecutor executor3 = executeTransaction(blockchain, tx3);
    // check return code from contract call
    Assert.assertArrayEquals(Hex.decode("FF"), executor3.getResult().getHReturn());
}

Example 63 with ECKey

use of org.ethereum.crypto.ECKey in project rskj by rsksmart.

the class CodeReplaceTest method replaceCodeTest2.

@Test
public void replaceCodeTest2() throws IOException, InterruptedException {
    // We test code replacement during initialization: this is forbitten.
    BigInteger nonce = config.getBlockchainConfig().getCommonConstants().getInitialNonce();
    BlockChainImpl blockchain = org.ethereum.core.ImportLightTest.createBlockchain(GenesisLoader.loadGenesis(config, nonce, getClass().getResourceAsStream("/genesis/genesis-light.json"), false));
    ECKey sender = ECKey.fromPrivate(Hex.decode("3ec771c31cac8c0dba77a69e503765701d3c2bb62435888d4ffa38fed60c445c"));
    System.out.println("address: " + Hex.toHexString(sender.getAddress()));
    String asm = // (4b) header script v1
    "HEADER !0x01 !0x01 !0x00 " + // (5b) we attempt to replace the code
    "0x01 0x00 CODEREPLACE " + // (7b) Extract real code into address 0, skip first 12 bytes, copy 1 bytes
    "0x01 0x15 0x00 CODECOPY " + // (5b) offset 0, size 0x01, now return the first code
    "0x01 0x00  RETURN " + // (1b) REAL code to install
    "STOP ";
    EVMAssembler assembler = new EVMAssembler();
    byte[] code = assembler.assemble(asm);
    // Creates a contract
    Transaction tx1 = createTx(blockchain, sender, new byte[0], code);
    TransactionExecutor executor1 = executeTransaction(blockchain, tx1);
    // Now we can directly check the store and see the new code.
    Assert.assertTrue(executor1.getResult().getException() != null);
}

Example 64 with ECKey

use of org.ethereum.crypto.ECKey in project rskj by rsksmart.

the class TransactionTest method dontLogWhenReverting.

@Test
public void dontLogWhenReverting() throws IOException, InterruptedException {
    /*

        Original contracts

        pragma solidity ^0.4.0;
        contract TestEventInvoked {
            event internalEvent();

            function doIt() {
                internalEvent();
                throw;
            }
        }

        contract TestEventInvoker {
            event externalEvent();

            function doIt(address invokedAddress) {
                externalEvent();
                invokedAddress.call.gas(50000)(0xb29f0835);
            }
        }

         */
    BigInteger nonce = config.getBlockchainConfig().getCommonConstants().getInitialNonce();
    Blockchain blockchain = ImportLightTest.createBlockchain(GenesisLoader.loadGenesis(config, nonce, getClass().getResourceAsStream("/genesis/genesis-light.json"), false));
    ECKey sender = ECKey.fromPrivate(Hex.decode("3ec771c31cac8c0dba77a69e503765701d3c2bb62435888d4ffa38fed60c445c"));
    System.out.println("address: " + Hex.toHexString(sender.getAddress()));
    // First contract code TestEventInvoked
    String code1 = "6060604052341561000f57600080fd5b5b60ae8061001e6000396000f30060606040526000357c0100000000000000000000000000000000000000000000000000000000900463ffffffff168063b29f083514603d575b600080fd5b3415604757600080fd5b604d604f565b005b7f95481a538d62f8458d3cecac82408d5ff2630d8335962b1cdbac16f1a9b910e760405160405180910390a1600080fd5b5600a165627a7a723058207d93861daff7f4a0479d7f3eb0ca7ef5cef7e2bbf2c4637ab4f021ecc5afa7ad0029";
    // Second contract code TestEventInvoker
    String code2 = "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";
    // Second contract ABI
    String abi2 = "[{\"constant\":false,\"inputs\":[{\"name\":\"invokedAddress\",\"type\":\"address\"}],\"name\":\"doIt\",\"outputs\":[],\"payable\":false,\"type\":\"function\"},{\"anonymous\":false,\"inputs\":[],\"name\":\"externalEvent\",\"type\":\"event\"}]";
    Transaction tx1 = createTx(blockchain, sender, new byte[0], Hex.decode(code1));
    executeTransaction(blockchain, tx1);
    Transaction tx2 = createTx(blockchain, sender, new byte[0], Hex.decode(code2));
    executeTransaction(blockchain, tx2);
    CallTransaction.Contract contract2 = new CallTransaction.Contract(abi2);
    byte[] data = contract2.getByName("doIt").encode(Hex.toHexString(tx1.getContractAddress().getBytes()));
    Transaction tx3 = createTx(blockchain, sender, tx2.getContractAddress().getBytes(), data);
    TransactionExecutor executor = executeTransaction(blockchain, tx3);
    Assert.assertEquals(1, executor.getResult().getLogInfoList().size());
    Assert.assertEquals(false, executor.getResult().getLogInfoList().get(0).isRejected());
    Assert.assertEquals(1, executor.getVMLogs().size());
}

Example 65 with ECKey

use of org.ethereum.crypto.ECKey in project rskj by rsksmart.

the class TransactionTest method test2.

@Ignore
@Test
public /* achieve public key of the sender */
void test2() throws Exception {
    // cat --> 79b08ad8787060333663d19704909ee7b1903e58
    // cow --> cd2a3d9f938e13cd947ec05abc7fe734df8dd826
    BigInteger value = new BigInteger("1000000000000000000000");
    byte[] privKey = HashUtil.keccak256("cat".getBytes());
    ECKey ecKey = ECKey.fromPrivate(privKey);
    byte[] senderPrivKey = HashUtil.keccak256("cow".getBytes());
    byte[] gasPrice = Hex.decode("09184e72a000");
    byte[] gas = Hex.decode("4255");
    // Tn (nonce); Tp(pgas); Tg(gaslimi); Tt(value); Tv(value); Ti(sender);  Tw; Tr; Ts
    Transaction tx = new Transaction(null, gasPrice, gas, ecKey.getAddress(), value.toByteArray(), null);
    tx.sign(senderPrivKey);
    System.out.println("v\t\t\t: " + Hex.toHexString(new byte[] { tx.getSignature().v }));
    System.out.println("r\t\t\t: " + Hex.toHexString(BigIntegers.asUnsignedByteArray(tx.getSignature().r)));
    System.out.println("s\t\t\t: " + Hex.toHexString(BigIntegers.asUnsignedByteArray(tx.getSignature().s)));
    System.out.println("RLP encoded tx\t\t: " + Hex.toHexString(tx.getEncoded()));
    // retrieve the signer/sender of the transaction
    ECKey key = ECKey.signatureToKey(tx.getHash().getBytes(), tx.getSignature().toBase64());
    System.out.println("Tx unsigned RLP\t\t: " + Hex.toHexString(tx.getEncodedRaw()));
    System.out.println("Tx signed   RLP\t\t: " + Hex.toHexString(tx.getEncoded()));
    System.out.println("Signature public key\t: " + Hex.toHexString(key.getPubKey()));
    System.out.println("Sender is\t\t: " + Hex.toHexString(key.getAddress()));
    assertEquals("cd2a3d9f938e13cd947ec05abc7fe734df8dd826", Hex.toHexString(key.getAddress()));
    System.out.println(tx.toString());
}