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Updated on 2026-08-14

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Tangem 2019-04-08 15:05:55 +03:00
parent 092eb2dd68
commit 250ceba99f
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app/src/main/java/com/tangem/wallet/EthTransaction.java Normal file
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package com.tangem.wallet;
import android.util.Log;
import com.tangem.util.ByteUtil;
import com.tangem.util.CryptoUtil;
import org.bitcoinj.core.ECKey;
import org.bitcoinj.core.Sha256Hash;
import org.spongycastle.util.BigIntegers;
import org.spongycastle.util.encoders.Hex;
import java.math.BigInteger;
import java.util.Arrays;
import static com.tangem.util.ByteUtil.EMPTY_BYTE_ARRAY;
/**
* Created by Ilia on 07.01.2018.
*/
public class EthTransaction {
byte[] nonce;
byte[] gasPrice;
byte[] gasLimit;
byte[] receiveAddress;
byte[] value;
byte[] data;
Integer chainId;
byte[] rlpRaw;
public ECDSASignatureETH signature;
byte[] rlpEncoded;
private static final int CHAIN_ID_INC = 35;
private static final int LOWER_REAL_V = 27;
public static EthTransaction create(String to, BigInteger amount, BigInteger nonce, BigInteger gasPrice, BigInteger gasLimit, Integer chainId) {
return new EthTransaction(BigIntegers.asUnsignedByteArray(nonce),
BigIntegers.asUnsignedByteArray(gasPrice),
BigIntegers.asUnsignedByteArray(gasLimit),
Hex.decode(to),
BigIntegers.asUnsignedByteArray(amount),
null,
chainId);
}
public static EthTransaction create(String to, BigInteger amount, BigInteger nonce, BigInteger gasPrice, BigInteger gasLimit, Integer chainId, byte[] data) {
return new EthTransaction(BigIntegers.asUnsignedByteArray(nonce),
BigIntegers.asUnsignedByteArray(gasPrice),
BigIntegers.asUnsignedByteArray(gasLimit),
Hex.decode(to),
BigIntegers.asUnsignedByteArray(amount),
data,
chainId);
}
public EthTransaction(byte[] nonce, byte[] gasPrice, byte[] gasLimit, byte[] receiveAddress, byte[] value, byte[] data, Integer chainId) {
this.nonce = nonce;
this.gasPrice = gasPrice;
this.gasLimit = gasLimit;
this.receiveAddress = receiveAddress;
if (ByteUtil.isSingleZero(value)) {
this.value = EMPTY_BYTE_ARRAY;
} else {
this.value = value;
}
this.data = data;
this.chainId = chainId;
if (receiveAddress == null) {
this.receiveAddress = ByteUtil.EMPTY_BYTE_ARRAY;
}
}
public enum ChainEnum {
Mainnet(1),
Morden(2),
Ropsten(3),
Rinkeby(4),
Rootstock_mainnet(30),
Rootstock_testnet(31),
Kovan(42),
Ethereum_Classic_mainnet(61),
Ethereum_Classic_testnet(62),
Geth_private_chains(1337);
private int value;
ChainEnum(int value) {
this.value = value;
}
public int getValue() {
return value;
}
}
public byte[] getRawHash() {
byte[] plainMsg = this.getEncodedRaw();
Keccak256 kec = new Keccak256();
return kec.digest(plainMsg);
}
public byte[] getHash() {
byte[] plainMsg = this.getEncoded();
Keccak256 kec = new Keccak256();
return kec.digest(plainMsg);
}
public int BruteRecoveryID2(ECDSASignatureETH sig, byte[] messageHash, byte[] thisKey) {
Log.e("ETH_KZ", BTCUtils.toHex(thisKey));
int recId = -1;
for (int i = 0; i < 4; i++) {
byte[] recK = CryptoUtil.recoverPubBytesFromSignature(i, sig, messageHash);
if (recK == null) {
continue;
}
Log.e("ETH_k " + String.valueOf(i), BTCUtils.toHex(recK));
if (Arrays.equals(recK, thisKey)) {
recId = i;
recId += 27;
break;
}
}
return recId;
}
public int BruteRecoveryID(ECKey.ECDSASignature sig, Sha256Hash messageHash, byte[] thisKey) {
Log.e("ETH_KZ", BTCUtils.toHex(thisKey));
int recId = -1;
for (int i = 0; i < 4; i++) {
ECKey k = ECKey.recoverFromSignature(i, sig, messageHash, false);
if (k == null)
continue;
byte[] recK = k.getPubKey();
Log.e("ETH_k " + String.valueOf(i), BTCUtils.toHex(recK));
if (k != null && Arrays.equals(recK, thisKey)) {
recId = i;
break;
}
}
return recId;
}
// signed TX
public byte[] getEncoded() {
// parse null as 0 for nonce
byte[] nonce = null;
if (this.nonce == null || this.nonce.length == 1 && this.nonce[0] == 0) {
nonce = RLP.encodeElement(null);
} else {
nonce = RLP.encodeElement(this.nonce);
}
byte[] gasPrice = RLP.encodeElement(this.gasPrice);
byte[] gasLimit = RLP.encodeElement(this.gasLimit);
byte[] receiveAddress = RLP.encodeElement(this.receiveAddress);
byte[] value = RLP.encodeElement(this.value);
byte[] data = RLP.encodeElement(this.data);
byte[] v, r, s;
if (signature != null) {
int encodeV;
if (chainId == null) {
encodeV = signature.v;
} else {
encodeV = signature.v - LOWER_REAL_V;
encodeV += chainId * 2 + CHAIN_ID_INC;
}
v = RLP.encodeInt(encodeV);
r = RLP.encodeElement(BigIntegers.asUnsignedByteArray(signature.r));
s = RLP.encodeElement(BigIntegers.asUnsignedByteArray(signature.s));
} else {
// Since EIP-155 use chainId for v
v = chainId == null ? RLP.encodeElement(EMPTY_BYTE_ARRAY) : RLP.encodeInt(chainId);
r = RLP.encodeElement(EMPTY_BYTE_ARRAY);
s = RLP.encodeElement(EMPTY_BYTE_ARRAY);
}
this.rlpEncoded = RLP.encodeList(nonce, gasPrice, gasLimit,
receiveAddress, value, data, v, r, s);
//this.hash = this.getHash();
return rlpEncoded;
}
// unsigned TX
public byte[] getEncodedRaw() {
// parse null as 0 for nonce
byte[] nonce = null;
if (this.nonce == null || this.nonce.length == 1 && this.nonce[0] == 0) {
nonce = RLP.encodeElement(null);
} else {
nonce = RLP.encodeElement(this.nonce);
}
byte[] gasPrice = RLP.encodeElement(this.gasPrice);
byte[] gasLimit = RLP.encodeElement(this.gasLimit);
byte[] receiveAddress = RLP.encodeElement(this.receiveAddress);
byte[] value = RLP.encodeElement(this.value);
byte[] data = RLP.encodeElement(this.data);
// Since EIP-155 use chainId for v
if (chainId == null) {
rlpRaw = RLP.encodeList(nonce, gasPrice, gasLimit, receiveAddress,
value, data);
} else {
byte[] v, r, s;
v = RLP.encodeInt(chainId);
r = RLP.encodeElement(EMPTY_BYTE_ARRAY);
s = RLP.encodeElement(EMPTY_BYTE_ARRAY);
rlpRaw = RLP.encodeList(nonce, gasPrice, gasLimit, receiveAddress,
value, data, v, r, s);
}
return rlpRaw;
}
}