Package org.ethereum.crypto

Examples of org.ethereum.crypto.ECKey$ECDSASignature

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    public void test3() throws Exception {

        // cat --> 79b08ad8787060333663d19704909ee7b1903e58
        // cow --> cd2a3d9f938e13cd947ec05abc7fe734df8dd826

    ECKey ecKey = ECKey.fromPrivate(HashUtil.sha3("cat".getBytes()));
        byte[] senderPrivKey = HashUtil.sha3("cow".getBytes());
       
    byte[] nonce = { 0x01 };
    byte[] gasPrice = Hex.decode("09184e72a000");
    byte[] gasLimit = Hex.decode("4255");
        BigInteger value = new BigInteger("1000000000000000000000000");

    Transaction tx = new Transaction(nonce, gasPrice, gasLimit,
        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(), 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()));

        Assert.assertEquals("cd2a3d9f938e13cd947ec05abc7fe734df8dd826",
                Hex.toHexString(key.getAddress()));
    }
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        return ECKey.recoverFromSignature(signature.v, signature, hash, true);
    }

    public byte[] getSender() {
    try {
      ECKey key = ECKey.signatureToKey(getHash(), getSignature().toBase64());
      return key.getAddress();
    } catch (SignatureException e) {
      logger.error(e.getMessage(), e);
    }
    return null;
    }
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    return null;
    }

    public void sign(byte[] privKeyBytes) throws MissingPrivateKeyException {
        byte[] hash = this.getHash();
        ECKey key = ECKey.fromPrivate(privKeyBytes).decompress();
        this.signature = key.sign(hash);
        this.rlpEncoded = null;
    }
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    @Test   // Testing account for simple balance set
    public void accountTest_1(){

        Repository repository = worldManager.getRepository();

        ECKey cowKey = ECKey.fromPrivate(HashUtil.sha3("cow".getBytes()));
        repository.createAccount(cowKey.getAddress());
        repository.addBalance(cowKey.getAddress(), BigInteger.TEN);

        Wallet wallet = new Wallet();
        wallet.setWorldManager(worldManager);

        wallet.importKey(cowKey.getPrivKeyBytes());

        BigInteger walletBalance = wallet.getBalance(cowKey.getAddress());
        Assert.assertEquals(BigInteger.TEN, walletBalance);

    }
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    @Test  // test account balance with pending "unblocked" transaction
    public void accountTest_2(){

        Repository repository = worldManager.getRepository();

        ECKey cowKey = ECKey.fromPrivate(HashUtil.sha3("cow".getBytes()));
        repository.createAccount(cowKey.getAddress());
        repository.addBalance(cowKey.getAddress(), BigInteger.TEN);

        Wallet wallet = new Wallet();
        wallet.setWorldManager(worldManager);

        wallet.importKey(cowKey.getPrivKeyBytes());

        Transaction tx = new Transaction(
                new byte[]{},
                Hex.decode("09184E72A000"),
                Hex.decode("03E8"),
                cowKey.getAddress(),
                Hex.decode("0A"),
                new byte[]{}
        );

        ECKey catKey = ECKey.fromPrivate(HashUtil.sha3("cat".getBytes()));
        tx.sign(catKey.getPrivKeyBytes());

        wallet.applyTransaction(tx);

        BigInteger walletBalance = wallet.getBalance(cowKey.getAddress());
        Assert.assertEquals(BigInteger.valueOf(20), walletBalance);
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    public void testSave1() throws TransformerException, ParserConfigurationException {

        Wallet wallet = new Wallet();
        wallet.setWorldManager(worldManager);

    ECKey cowKey = ECKey.fromPrivate(HashUtil.sha3("cow".getBytes()));
    ECKey catKey = ECKey.fromPrivate(HashUtil.sha3("cat".getBytes()));

        wallet.importKey(cowKey.getPrivKeyBytes());
        wallet.importKey(catKey.getPrivKeyBytes());

        wallet.setHigh(4354);

        wallet.save();
    }
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Related Classes of org.ethereum.crypto.ECKey$ECDSASignature

  • org.ethereum.core.Account
  • org.ethereum.core.Transaction
  • org.spongycastle.asn1.x9.X9IntegerConverter
  • org.spongycastle.crypto.AsymmetricCipherKeyPair
  • org.spongycastle.crypto.digests.SHA256Digest
  • org.spongycastle.crypto.generators.ECKeyPairGenerator
  • org.spongycastle.crypto.params.ECKeyGenerationParameters
  • org.spongycastle.crypto.params.ECPrivateKeyParameters
  • org.spongycastle.crypto.params.ECPublicKeyParameters
  • org.spongycastle.crypto.signers.ECDSASigner
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