Updated on 2026-08-14
This commit is contained in:
Tangem
parent
f403e50309
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8eeda55d9d
12 changed files with 183 additions and 153 deletions
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@ -2,6 +2,8 @@ package com.tangem.domain.wallet;
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import com.tangem.wallet.R;
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import java.math.BigInteger;
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public class BalanceValidator {
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private String firstLine;
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private String secondLine;
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@ -11,7 +13,8 @@ public class BalanceValidator {
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return firstLine;
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}
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public String getSecondLine() {
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public String getSecondLine(Boolean recommend) {
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if (!recommend) return secondLine;
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if (score > 89) {
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return "Safe to accept. " + secondLine;
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} else if (score > 74) {
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@ -35,77 +38,45 @@ public class BalanceValidator {
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}
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}
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public void Check(TangemCard card) {
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public void Check(TangemCard card, Boolean attest) {
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firstLine = "Verification failed";
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secondLine = "";
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// rule 1
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if ((!CheckOfflineBalance(card) && !CheckOnlineBalance(card)) || (!CheckOnlineBalance(card) && HasEverSigned(card))) {
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score = 0;
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firstLine = "Unknown balance";
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secondLine = "Balance cannot be verified. Swipe down to refresh.";
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return;
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}
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if (card.getBlockchain() == Blockchain.Bitcoin) {
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// Workaround before new back-end
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// if (!HasEverSigned(card)) {
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if (((card.getOfflineBalance() == null) && !card.isBalanceReceived()) || (!card.isBalanceReceived() && (card.getRemainingSignatures() != card.getMaxSignatures()))) {
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score = 0;
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firstLine = "Unknown balance";
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secondLine = "Balance cannot be verified. Swipe down to refresh.";
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return;
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}
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// Workaround before new back-end
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// if (card.getRemainingSignatures() == card.getMaxSignatures()) {
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// firstLine = "Verified balance";
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// secondLine = "Balance confirmed in blockchain. ";
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// secondLine += "Verified note identity. ";
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// return;
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// }
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// rule 2.a
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if (!VerificationWalletKey(card)) {
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score = 0;
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firstLine = "Verification failed";
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secondLine = "Wallet verification failed. Tap again.";
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return;
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}
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// rule 2.c
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if (!CheckAttestationServiceResult(card) && CheckAttestationServiceAvailable(card)) {
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score = 0;
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firstLine = "Not genuine banknote";
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secondLine = "Tangem Attestation service says the banknote is not genuine.";
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return;
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}
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// rule 6
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if (NotConfirmTransaction(card)) {
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score = 0;
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firstLine = "Unguaranted balance";
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secondLine = "Loading in progress. Wait for full confirmation in blockchain. ";
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return;
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}
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// rule 5
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if (!isCodeConfirmed(card)) {
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score = 0;
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firstLine = "Not genuine banknote";
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secondLine = "Firmware binary code verification failed";
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return;
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}
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// rule 5
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if (card.PIN2 == TangemCard.PIN2_Mode.CustomPIN2) {
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score = 0;
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firstLine = "Locked with PIN2";
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secondLine = "Ask the holder to disable PIN2 before accepting";
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return;
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}
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if (card.isBalanceReceived() && card.isBalanceEqual()) {
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score = 100;
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firstLine = "Verified balance";
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secondLine = "Balance confirmed in blockchain. ";
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if (card.getBalance() == 0) {
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firstLine = "";
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if (card.getBalanceUnconfirmed() != 0) {
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score = 0;
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firstLine = "Unguaranted balance";
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secondLine = "Loading in progress. Wait for full confirmation in blockchain. ";
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return;
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}
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}
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// rule 4 TODO: need to check SignedHashed against number of outputs in blockchain
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// if(HasEverSigned(card) && card.getBalance() != 0)
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if (card.isBalanceReceived() && card.isBalanceEqual()) {
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score = 100;
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firstLine = "Verified balance";
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secondLine = "Balance confirmed in blockchain. ";
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if (card.getBalance() == 0) {
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firstLine = "";
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}
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}
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// rule 4 TODO: need to check SignedHashed against number of outputs in blockchain
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// if((card.getRemainingSignatures() != card.getMaxSignatures()) && card.getBalance() != 0)
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// {
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// score = 80;
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// firstLine = "Unguaranteed balance";
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@ -113,20 +84,11 @@ public class BalanceValidator {
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// return;
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// }
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// rule 7
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if (CheckOfflineBalance(card) && !CheckOnlineBalance(card) && !HasEverSigned(card) && card.getBalance() != 0) {
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score = 80;
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firstLine = "Verified offline balance";
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secondLine = "Can't obtain balance from blockchain. Restore internet connection to be more confident. ";
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}
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// rule 2.b
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if (CheckAttestationServiceAvailable(card)) {
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secondLine += "Verified note identity. ";
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} else {
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score = 80;
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secondLine += "Card identity was not verified. Cannot reach Tangem attestation service. ";
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}
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if ((card.getOfflineBalance() != null) && !card.isBalanceReceived() && (card.getRemainingSignatures() == card.getMaxSignatures()) && card.getBalance() != 0) {
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score = 80;
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firstLine = "Verified offline balance";
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secondLine = "Can't obtain balance from blockchain. Restore internet connection to be more confident. ";
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}
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// if(card.getFailedBalanceRequestCounter()!=0) {
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// score -= 5 * card.getFailedBalanceRequestCounter();
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@ -135,47 +97,84 @@ public class BalanceValidator {
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// return;
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// }
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//
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//
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// if(card.isBalanceReceived() && !card.isBalanceEqual()) {
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// score = 0;
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// firstLine = "Disputed balance";
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// secondLine += " Cannot obtain trusted balance at the moment. Try to tap and check this banknote later.";
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// return;
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// }
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} else if ((card.getBlockchain() == Blockchain.Ethereum) || (card.getBlockchain() == Blockchain.Token)) {
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if (card.getBalance() == null) {
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score = 0;
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firstLine = "Unknown balance";
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secondLine = "Balance cannot be verified. Swipe down to refresh.";
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return;
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}
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}
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if (!card.getUnconfirmedTXCount().equals(card.getConfirmedTXCount())) {
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score = 0;
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firstLine = "Unguaranteed balance";
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secondLine = "Transaction is in progress. Wait for confirmation in blockchain. ";
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return;
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}
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boolean CheckOfflineBalance(TangemCard card) {
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return card.getOfflineBalance() != null;
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}
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if (card.isBalanceReceived()) {
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score = 100;
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firstLine = "Verified balance";
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secondLine = "Balance confirmed in blockchain. ";
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if (card.getBalance() == 0) {
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firstLine = "";
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}
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}
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boolean CheckOnlineBalance(TangemCard card) {
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return card.isBalanceReceived();
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}
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if ((card.getOfflineBalance() != null) && !card.isBalanceReceived() && (card.getRemainingSignatures() == card.getMaxSignatures()) && card.getBalance() != 0) {
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score = 80;
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firstLine = "Verified offline balance";
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secondLine = "Can't obtain balance from blockchain. Restore internet connection to be more confident. ";
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}
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}
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boolean VerificationWalletKey(TangemCard card) {
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return card.isWalletPublicKeyValid();
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}
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// Verify card?
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if (attest) {
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boolean HasEverSigned(TangemCard card) {
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// return card.getSignedHashes() != 0 || card.getRemainingSignatures() != card.getMaxSignatures();
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return card.getRemainingSignatures() != card.getMaxSignatures();
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}
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if (!card.isWalletPublicKeyValid()) {
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score = 0;
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firstLine = "Verification failed";
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secondLine = "Wallet verification failed. Tap again.";
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return;
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}
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boolean CheckAttestationServiceAvailable(TangemCard card) {
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return card.isOnlineVerified() != null;
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}
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if (card.isOnlineVerified() != null && !card.isOnlineVerified()) {
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score = 0;
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firstLine = "Not genuine banknote";
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secondLine = "Tangem Attestation service says the banknote is not genuine.";
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return;
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}
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boolean CheckAttestationServiceResult(TangemCard card) {
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return card.isOnlineVerified() != null && card.isOnlineVerified() == true;
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}
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if (card.isCodeConfirmed() != null && !card.isCodeConfirmed()) {
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score = 0;
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firstLine = "Not genuine banknote";
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secondLine = "Firmware binary code verification failed";
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return;
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}
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boolean NotConfirmTransaction(TangemCard card) {
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return card.getBalanceUnconfirmed() != 0;
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}
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if (card.PIN2 == TangemCard.PIN2_Mode.CustomPIN2) {
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score = 0;
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firstLine = "Locked with PIN2";
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secondLine = "Ask the holder to disable PIN2 before accepting";
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return;
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}
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// rule 2.b
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if (card.isOnlineVerified()) {
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secondLine += "Verified note identity. ";
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} else {
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score = 80;
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secondLine += "Card identity was not verified. Cannot reach Tangem attestation service. ";
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}
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}
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boolean isCodeConfirmed(TangemCard card) {
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return card.isCodeConfirmed() == null || card.isCodeConfirmed();
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}
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}
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@ -318,7 +318,7 @@ public class EthEngine extends CoinEngine {
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public byte[] sign(String feeValue, String amountValue, boolean IncFee, String toValue, TangemCard mCard, CardProtocol protocol) throws Exception {
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BigInteger nonceValue = mCard.GetConfirmTXCount();
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BigInteger nonceValue = mCard.getConfirmedTXCount();
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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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@ -47,19 +47,27 @@ public class TangemCard {
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private float rate = 0;
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private float rateAlter = 0;
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private BigInteger countConfirmTX = null;
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private BigInteger countConfirmedTX = null;
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private BigInteger countUnconfirmedTX = BigInteger.valueOf(0);
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public BigInteger GetConfirmTXCount() {
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if (countConfirmTX == null) {
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countConfirmTX = BigInteger.valueOf(0);
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public BigInteger getConfirmedTXCount() {
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if (countConfirmedTX == null) {
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countConfirmedTX = BigInteger.valueOf(0);
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}
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return countConfirmTX;
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return countConfirmedTX;
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}
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public void setConfirmTXCount(BigInteger count) {
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countConfirmTX = count;
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public void setConfirmedTXCount(BigInteger count) {
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countConfirmedTX = count;
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}
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public BigInteger getUnconfirmedTXCount() {
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if (countUnconfirmedTX == null) {
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countUnconfirmedTX = BigInteger.valueOf(0);
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}
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return countUnconfirmedTX;
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}
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public void setUnconfirmedTXCount(BigInteger count) {
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countUnconfirmedTX = count;
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}
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public float getRate() {
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return rate;
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}
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@ -1114,7 +1122,12 @@ public class TangemCard {
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}
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public Long getBalance() {
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return balanceConfirmed + balanceUnconfirmed;
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if (this.getBlockchain() == Blockchain.Bitcoin || this.getBlockchain() == Blockchain.BitcoinCash || this.getBlockchain() == Blockchain.BitcoinTestNet || this.getBlockchain() == Blockchain.BitcoinCashTestNet) {
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return balanceConfirmed + balanceUnconfirmed;
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} else if (this.getBlockchain() == Blockchain.Ethereum || this.getBlockchain() == Blockchain.EthereumTestNet) {
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return 1L; // Todo: Workaround for eth, need to return BigDecimal everywhere
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}
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return 0L;
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}
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public Long getBalanceUnconfirmed() {
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@ -1329,7 +1342,8 @@ public class TangemCard {
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}
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B.putFloat("rate", rate);
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B.putFloat("rateAlter", rateAlter);
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B.putString("confirmTx", GetConfirmTXCount().toString(16));
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B.putString("confirmTx", getConfirmedTXCount().toString(16));
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B.putString("unconfirmTx", getUnconfirmedTXCount().toString(16));
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if (codeConfirmed != null)
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B.putBoolean("codeConfirmed", codeConfirmed);
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@ -1484,7 +1498,9 @@ public class TangemCard {
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if (B.containsKey("rateAlter"))
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rateAlter = B.getFloat("rateAlter");
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if (B.containsKey("confirmTx"))
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countConfirmTX = new BigInteger(B.getString("confirmTx"), 16);
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countConfirmedTX = new BigInteger(B.getString("confirmTx"), 16);
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if (B.containsKey("unconfirmTx"))
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countUnconfirmedTX = new BigInteger(B.getString("unconfirmTx"), 16);
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if (B.containsKey("codeConfirmed"))
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codeConfirmed = B.getBoolean("codeConfirmed");
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@ -329,7 +329,7 @@ public class TokenEngine extends CoinEngine {
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public byte[] sign(String feeValue, String amountValue, boolean IncFee, String toValue, TangemCard mCard, CardProtocol protocol) throws Exception {
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BigInteger nonceValue = mCard.GetConfirmTXCount();
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BigInteger nonceValue = mCard.getConfirmedTXCount();
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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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