Updated on 2026-08-14
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Tangem
parent
61c4f7047d
commit
52ce16bb09
86 changed files with 9207 additions and 9295 deletions
392
app/src/main/java/com/tangem/domain/wallet/EthEngine.java
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392
app/src/main/java/com/tangem/domain/wallet/EthEngine.java
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package com.tangem.domain.wallet;
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import android.net.Uri;
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import android.util.Log;
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import com.tangem.domain.cardReader.CardProtocol;
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import com.tangem.domain.cardReader.TLV;
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import org.bitcoinj.core.ECKey;
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import java.math.BigDecimal;
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import java.math.BigInteger;
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import java.math.RoundingMode;
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import java.security.NoSuchAlgorithmException;
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import java.security.NoSuchProviderException;
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import java.text.DecimalFormat;
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import java.util.Arrays;
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import java.util.Date;
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import static com.tangem.domain.wallet.FormatUtil.GetDecimalFormat;
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/**
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* Created by Ilia on 15.02.2018.
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*/
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public class EthEngine extends CoinEngine {
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public String GetNextNode(TangemCard mCard)
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{
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return "abc1.hsmiths.com";
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}
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public int GetNextNodePort(TangemCard mCard)
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{
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return 60001;
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}
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public String GetNode(TangemCard mCard)
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{
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return "abc1.hsmiths.com";
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}
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public int GetNodePort(TangemCard mCard)
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{
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return 60001;
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}
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public void SwitchNode(TangemCard mCard)
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{
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}
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public boolean InOutPutVisible()
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{
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return false;
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}
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public String GetBalanceCurrency(TangemCard card)
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{
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return "ETH";
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}
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public boolean AwaitingConfirmation(TangemCard card)
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{
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return false;
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}
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public String GetFeeCurrency()
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{
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return "Gwei";
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}
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public boolean IsNeedCheckNode()
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{
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return false;
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}
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BigDecimal convertToEth(String value)
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{
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BigInteger m = new BigInteger(value, 10);
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BigDecimal n = new BigDecimal(m);
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BigDecimal d = n.divide(new BigDecimal("1000000000000000000"));
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d = d.setScale(8, RoundingMode.DOWN);
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return d;
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}
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public int GetTokenDecimals(TangemCard card)
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{
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return 0;
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}
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public String GetContractAddress(TangemCard card)
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{
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return "";
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}
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public boolean ValdateAddress(String address, TangemCard card) {
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if (address == null || address.isEmpty())
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{
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return false;
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}
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if(!address.startsWith("0x")&&!address.startsWith("0X"))
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{
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return false;
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}
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if(address.length()!=42)
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{
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return false;
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}
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return true;
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}
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public String GetBalanceValue(TangemCard mCard)
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{
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String dec = mCard.getDecimalBalance();
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BigDecimal d = convertToEth(dec);
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String s = d.toString();
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String pattern = "#0.000"; // If you like 4 zeros
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DecimalFormat myFormatter = new DecimalFormat(pattern);
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String output = myFormatter.format(d);
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return output;
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}
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public static String getAmountEquivalentDescriptionETH(BigDecimal amount, float rateValue) {
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if (amount == null || amount.compareTo(BigDecimal.ZERO) == 0)
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return "";
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if (rateValue > 0) {
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BigDecimal biRate = new BigDecimal(rateValue);
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BigDecimal exchangeCurs = biRate.multiply(amount);
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exchangeCurs = exchangeCurs.setScale(2, RoundingMode.DOWN);
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return "≈ USD " + exchangeCurs.toString();
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} else {
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return "≈ USD ---";
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}
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}
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public static String getAmountEquivalentDescriptionETH(Double amount, float rate) {
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if (amount == 0)
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return "";
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amount = amount / 100000;
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if (rate > 0) {
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return String.format("≈ USD %.2f", amount * rate);
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} else {
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return "≈ USD ---";
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}
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}
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@Override
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public String GetBalanceEquivalent(TangemCard mCard) {
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String dec = mCard.getDecimalBalance();
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BigDecimal d = convertToEth(dec);
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return getAmountEquivalentDescriptionETH(d, mCard.getRate());
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}
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@Override
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public String GetBalance(TangemCard mCard) {
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if(!HasBalanceInfo(mCard)){
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return "-- -- -- " + GetBalanceCurrency(mCard);
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}
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String output = GetBalanceValue(mCard);
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String s = output + " " + GetBalanceCurrency(mCard);
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return s;
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}
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public Long GetBalanceLong(TangemCard mCard)
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{
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return mCard.getBalance();
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}
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public String GetBalanceWithAlter(TangemCard mCard)
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{
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return GetBalance(mCard);
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}
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public boolean IsBalanceAlterNotZero(TangemCard card)
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{
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return true;
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}
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public boolean IsBalanceNotZero(TangemCard card)
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{
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String balance = card.getDecimalBalance();
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if(balance == null || balance == "")
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return false;
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BigDecimal bi = new BigDecimal(balance);
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if (BigDecimal.ZERO.compareTo(bi) == 0)
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return false;
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return true;
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}
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@Override
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public String ConvertByteArrayToAmount(TangemCard mCard, byte[] bytes) throws Exception {
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throw new Exception("Not implemented");
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}
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@Override
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public byte[] ConvertAmountToByteArray(TangemCard mCard, String amount) throws Exception {
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throw new Exception("Not implemented");
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}
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@Override
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public String GetAmountDescription(TangemCard mCard, String amount) throws Exception {
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throw new Exception("Not implemented");
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}
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public String GetAmountEqualentDescriptor(TangemCard mCard, String value)
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{
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BigDecimal d = new BigDecimal(value);
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return getAmountEquivalentDescriptionETH(d, mCard.getRate());
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}
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public boolean CheckAmount(TangemCard card, String amount) throws Exception
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{
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DecimalFormat decimalFormat = GetDecimalFormat();
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BigDecimal amountValue = (BigDecimal) decimalFormat.parse(amount); //new BigDecimal(strAmount);
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BigDecimal maxValue = new BigDecimal(GetBalanceValue(card));
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if(amountValue.compareTo(maxValue) > 0 )
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{
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return false;
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}
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return true;
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}
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public boolean HasBalanceInfo(TangemCard card)
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{
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return card.hasBalanceInfo();
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}
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public Uri getShareWalletURI(TangemCard mCard)
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{
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return Uri.parse("" + mCard.getWallet());
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}
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public Uri getShareWalletURIExplorer(TangemCard mCard)
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{
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if(mCard.getBlockchain() == Blockchain.EthereumTestNet)
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return Uri.parse("https://rinkeby.etherscan.io/address/" + mCard.getWallet());
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else
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return Uri.parse("https://etherscan.io/address/" + mCard.getWallet());
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}
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public boolean CheckUnspentTransaction(TangemCard mCard)
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{
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return true;
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}
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public boolean CheckAmountValie(TangemCard mCard, String amountValue, String feeValue, Long minFeeInInternalUnits)
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{
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Long fee = null;
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Long amount = null;
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try {
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amount = mCard.InternalUnitsFromString(amountValue);
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fee = mCard.InternalUnitsFromString(feeValue);
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} catch (Exception e) {
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e.printStackTrace();
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return false;
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}
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if(fee == null || amount == null)
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return false;
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if(fee == 0 || amount ==0)
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return false;
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if(fee < minFeeInInternalUnits)
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return false;
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BigDecimal tmpFee = new BigDecimal(feeValue);
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BigDecimal tmpAmount = new BigDecimal(amountValue);
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tmpAmount = tmpAmount.multiply(new BigDecimal("1000000000"));
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if (tmpFee.compareTo(tmpAmount) > 0)
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return false;
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return true;
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}
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public String EvaluteFeeEquivalent(TangemCard mCard, String fee)
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{
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BigDecimal gweFee = new BigDecimal(fee);
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gweFee = gweFee.divide(new BigDecimal("1000000000"));
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gweFee = gweFee.setScale(18, RoundingMode.DOWN);
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return GetAmountEqualentDescriptor(mCard, gweFee.toString());
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}
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public String calculateAddress(TangemCard mCard, byte[] pkUncompressed) throws NoSuchProviderException, NoSuchAlgorithmException {
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Keccak256 kec = new Keccak256();
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int lenPk = pkUncompressed.length;
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if (lenPk < 2) {
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throw new IllegalArgumentException("Uncompress public key length is invald");
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}
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byte[] cleanKey = new byte[lenPk - 1];
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for (int i = 0; i < cleanKey.length; ++i) {
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cleanKey[i] = pkUncompressed[i + 1];
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}
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byte[] r = kec.digest(cleanKey);
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byte[] address = new byte[20];
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for (int i = 0; i < 20; ++i) {
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address[i] = r[i + 12];
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}
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return String.format("0x%s", BTCUtils.toHex(address));
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}
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public byte[] Sign(String feeValue, String amountValue, String toValue, TangemCard mCard, CardProtocol protocol) throws Exception {
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BigInteger nonceValue = mCard.GetConfirmTXCount();
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byte[] pbKey = mCard.getWalletPublicKey();
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boolean flag = (mCard.getSigningMethod()== TangemCard.SigningMethod.Sign_Hash_Validated_By_Issuer);
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Issuer issuer = mCard.getIssuer();
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BigInteger fee = new BigInteger(feeValue, 10);
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BigDecimal amountDec = new BigDecimal(amountValue);
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amountDec = amountDec.multiply(new BigDecimal("1000000000"));
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BigInteger amount = amountDec.toBigInteger(); //new BigInteger(amountValue, 10);
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amount = amount.subtract(fee);
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BigInteger nonce = nonceValue;
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BigInteger gasPrice = fee.divide(BigInteger.valueOf(21000));
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BigInteger gasLimit = BigInteger.valueOf(21000);
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Integer chainId = mCard.getBlockchain() == Blockchain.Ethereum ? ETH_Transaction.ChainEnum.Mainnet.getValue() : ETH_Transaction.ChainEnum.Rinkeby.getValue();
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Long multiplicator = 1000000000L;
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amount = amount.multiply(BigInteger.valueOf(multiplicator));
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gasPrice = gasPrice.multiply(BigInteger.valueOf(multiplicator));
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String to = toValue;
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if (to.startsWith("0x") || to.startsWith("0X")) {
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to = to.substring(2);
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}
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ETH_Transaction tx = ETH_Transaction.create(to, amount, nonce, gasPrice, gasLimit, chainId);
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byte[][] hashesForSign = new byte[1][];
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byte[] for_hash = tx.getRawHash();
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hashesForSign[0] = for_hash;
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byte[] signFromCard = null;
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try {
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signFromCard = protocol.run_SignHashes(PINStorage.getPIN2(), hashesForSign, flag, null, issuer).getTLV(TLV.Tag.TAG_Signature).Value;
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// TODO slice signFromCard to hashes.length parts
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} catch (Exception ex) {
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Log.e("ETH", ex.getMessage());
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return null;
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}
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LastSignStorage.setLastSignDate(mCard.getWallet(), new Date());
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BigInteger r = new BigInteger(1, Arrays.copyOfRange(signFromCard, 0, 32));
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BigInteger s = new BigInteger(1, Arrays.copyOfRange(signFromCard, 32, 64));
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s = CryptoUtil.toCanonicalised(s);
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boolean f = ECKey.verify(for_hash, new ECKey.ECDSASignature(r, s), pbKey);
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if(!f)
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{
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Log.e("ETH-CHECK", "Sign Failed.");
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}
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tx.signature = new ECDSASignature_ETH(r, s);
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int v = tx.BruteRecoveryID2(tx.signature, for_hash, pbKey);
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if (v != 27 && v != 28) {
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Log.e("ETH", "invalid v");
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return null;
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}
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tx.signature.v = (byte) v;
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Log.e("ETH_v", String.valueOf(v));
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byte[] realTX = tx.getEncoded();
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return realTX;
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}
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}
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