Updated on 2026-08-14

2023-02-16 15:27:52 +03:00 · 2023-02-16 15:27:52 +03:00 · 7f3d810755
commit 7f3d810755
parent 7b15bb555e
13 changed files with 104 additions and 14 deletions
--- a/core/res/src/main/res/values-de/strings.xml
+++ b/core/res/src/main/res/values-de/strings.xml
@ -335,6 +335,8 @@
    <string name="swapping_error_wrapper">Error: %s</string>
    <string name="swapping_generic_error">There was an error. Please try again.</string>
    <string name="swapping_give_permission">Give Permission</string>
+    <string name="swapping_high_price_impact">High price impact!</string>
+    <string name="swapping_high_price_impact_description">Swapping this amount of selected tokens will cause a significant price impact and reduce your outcome.</string>
    <string name="swapping_insufficient_funds">Insufficient funds</string>
    <string name="swapping_not_enough_funds_for_fee">Not enough funds for fee in your %1$s wallet to create a transaction. Top up your %2$s wallet first.</string>
    <string name="swapping_pending_transaction_subtitle">Transaction in progress...</string>
--- a/core/res/src/main/res/values-fr/strings.xml
+++ b/core/res/src/main/res/values-fr/strings.xml
@ -335,6 +335,8 @@
    <string name="swapping_error_wrapper">Error: %s</string>
    <string name="swapping_generic_error">There was an error. Please try again.</string>
    <string name="swapping_give_permission">Give Permission</string>
+    <string name="swapping_high_price_impact">High price impact!</string>
+    <string name="swapping_high_price_impact_description">Swapping this amount of selected tokens will cause a significant price impact and reduce your outcome.</string>
    <string name="swapping_insufficient_funds">Insufficient funds</string>
    <string name="swapping_not_enough_funds_for_fee">Not enough funds for fee in your %1$s wallet to create a transaction. Top up your %2$s wallet first.</string>
    <string name="swapping_pending_transaction_subtitle">Transaction in progress...</string>
--- a/core/res/src/main/res/values-it/strings.xml
+++ b/core/res/src/main/res/values-it/strings.xml
@ -335,6 +335,8 @@
    <string name="swapping_error_wrapper">Error: %s</string>
    <string name="swapping_generic_error">There was an error. Please try again.</string>
    <string name="swapping_give_permission">Give Permission</string>
+    <string name="swapping_high_price_impact">High price impact!</string>
+    <string name="swapping_high_price_impact_description">Swapping this amount of selected tokens will cause a significant price impact and reduce your outcome.</string>
    <string name="swapping_insufficient_funds">Insufficient funds</string>
    <string name="swapping_not_enough_funds_for_fee">Not enough funds for fee in your %1$s wallet to create a transaction. Top up your %2$s wallet first.</string>
    <string name="swapping_pending_transaction_subtitle">Transaction in progress...</string>
--- a/core/res/src/main/res/values-ru/strings.xml
+++ b/core/res/src/main/res/values-ru/strings.xml
@ -335,6 +335,8 @@
    <string name="swapping_error_wrapper">Ошибка: %s</string>
    <string name="swapping_generic_error">Произошла ошибка. Пожалуйста, попробуйте еще раз.</string>
    <string name="swapping_give_permission">Дать разрешение</string>
+    <string name="swapping_high_price_impact">Сильные колебания цены!</string>
+    <string name="swapping_high_price_impact_description">Обмен этой суммы выбранных токенов может вызвать значительные колебания цены и уменьшить получаемую сумму.</string>
    <string name="swapping_insufficient_funds">Недостаточно средств</string>
    <string name="swapping_not_enough_funds_for_fee">Недостаточно средств для оплаты на вашем %1$s кошельке для создания транзакции. Сначала пополните свой %2$s кошелек.</string>
    <string name="swapping_pending_transaction_subtitle">Транзакция в процессе…</string>
--- a/core/res/src/main/res/values-zh-rTW/strings.xml
+++ b/core/res/src/main/res/values-zh-rTW/strings.xml
@ -335,6 +335,8 @@
    <string name="swapping_error_wrapper">錯誤： %s</string>
    <string name="swapping_generic_error">有錯誤。請再試一遍</string>
    <string name="swapping_give_permission">賦予權限</string>
+    <string name="swapping_high_price_impact">High price impact!</string>
+    <string name="swapping_high_price_impact_description">Swapping this amount of selected tokens will cause a significant price impact and reduce your outcome.</string>
    <string name="swapping_insufficient_funds">餘額不足</string>
    <string name="swapping_not_enough_funds_for_fee">您的 %1$s 錢包中沒有足夠的資金來創建交易。首先為您的 %2$s 錢包充值</string>
    <string name="swapping_pending_transaction_subtitle">交易進行中...</string>
--- a/core/res/src/main/res/values/strings.xml
+++ b/core/res/src/main/res/values/strings.xml
@ -335,6 +335,8 @@
    <string name="swapping_error_wrapper">Error: %s</string>
    <string name="swapping_generic_error">There was an error. Please try again.</string>
    <string name="swapping_give_permission">Give Permission</string>
+    <string name="swapping_high_price_impact">High price impact!</string>
+    <string name="swapping_high_price_impact_description">Swapping this amount of selected tokens will cause a significant price impact and reduce your outcome.</string>
    <string name="swapping_insufficient_funds">Insufficient funds</string>
    <string name="swapping_not_enough_funds_for_fee">Not enough funds for fee in your %1$s wallet to create a transaction. Top up your %2$s wallet first.</string>
    <string name="swapping_pending_transaction_subtitle">Transaction in progress...</string>
--- a/features/referral/presentation/src/main/java/com/tangem/feature/referral/ui/ReferralScreen.kt
+++ b/features/referral/presentation/src/main/java/com/tangem/feature/referral/ui/ReferralScreen.kt
@ -67,8 +67,6 @@ import com.tangem.feature.referral.presentation.R
 import com.valentinilk.shimmer.shimmer
 import kotlinx.coroutines.launch

-private const val GOOGLE_DOC_LINK_WRAPPER = "https://docs.google.com/viewer?url=%s&embedded=false"
-
 /**
 * Referral program screen for participant and non-participant
 *
@ -87,8 +85,8 @@ internal fun ReferralScreen(stateHolder: ReferralStateHolder) {
            sheetContent = {
                AgreementBottomSheetContent(
                    url = when (val state = stateHolder.referralInfoState) {
-                        is ReferralInfoState.NonParticipantContent -> String.format(GOOGLE_DOC_LINK_WRAPPER, state.url)
-                        is ReferralInfoState.ParticipantContent -> String.format(GOOGLE_DOC_LINK_WRAPPER, state.url)
+                        is ReferralInfoState.NonParticipantContent -> state.url
+                        is ReferralInfoState.ParticipantContent -> state.url
                        is ReferralInfoState.Loading -> ""
                    },
                )
--- a/features/swap/domain/src/main/java/com/tangem/feature/swap/domain/SwapInteractorImpl.kt
+++ b/features/swap/domain/src/main/java/com/tangem/feature/swap/domain/SwapInteractorImpl.kt
@ -26,6 +26,7 @@ import com.tangem.lib.crypto.models.ProxyFiatCurrency
 import com.tangem.lib.crypto.models.transactions.SendTxResult
 import com.tangem.utils.toFiatString
 import java.math.BigDecimal
+import java.math.RoundingMode
 import javax.inject.Inject

@Suppress("LargeClass")
@ -496,6 +497,12 @@ internal class SwapInteractorImpl @Inject constructor(
                ),
            ),
            fee = formattedFee,
+            priceImpact = calculatePriceImpact(
+                fromTokenAmount = fromTokenAmount.value,
+                fromRate = rates[fromToken.id] ?: 0.0,
+                toTokenAmount = toTokenAmount.value,
+                toRate = rates[toToken.id] ?: 0.0,
+            ),
            networkCurrency = userWalletManager.getNetworkCurrency(networkId),
            preparedSwapConfigState = preparedSwapConfigState,
            swapDataModel = swapDataModel,
@ -605,6 +612,17 @@ internal class SwapInteractorImpl @Inject constructor(
        return amountToSwap.replace(",", ".").toBigDecimalOrNull()
    }

+    private fun calculatePriceImpact(
+        fromTokenAmount: BigDecimal,
+        fromRate: Double,
+        toTokenAmount: BigDecimal,
+        toRate: Double,
+    ): Float {
+        val toTokenFiatValue = toTokenAmount.multiply(toRate.toBigDecimal()).setScale(2, RoundingMode.HALF_UP)
+        val fromTokenFiatValue = fromTokenAmount.multiply(fromRate.toBigDecimal()).setScale(2, RoundingMode.HALF_UP)
+        return (BigDecimal.ONE - toTokenFiatValue / fromTokenFiatValue).toFloat()
+    }
+
    companion object {
        private const val DEFAULT_SLIPPAGE = 2
        private const val ZERO_BALANCE = "0"
--- a/features/swap/domain/src/main/java/com/tangem/feature/swap/domain/models/ui/SwapState.kt
+++ b/features/swap/domain/src/main/java/com/tangem/feature/swap/domain/models/ui/SwapState.kt
@ -12,6 +12,7 @@ sealed interface SwapState {
        val fromTokenInfo: TokenSwapInfo,
        val toTokenInfo: TokenSwapInfo,
        val fee: String,
+        val priceImpact: Float,
        val networkCurrency: String,
        val preparedSwapConfigState: PreparedSwapConfigState,
        val permissionState: PermissionDataState = PermissionDataState.Empty,
--- a/features/swap/presentation/src/main/java/com/tangem/feature/swap/models/SwapStateHolder.kt
+++ b/features/swap/presentation/src/main/java/com/tangem/feature/swap/models/SwapStateHolder.kt
@ -84,7 +84,12 @@ sealed interface SwapWarning {
        val onClick: () -> Unit,
    ) : SwapWarning
    // data class RateExpired(val onClick: () -> Unit) : SwapWarning
-    // object HighPriceImpact : SwapWarning
+    /**
+     * High price impact warning
+     *
+     * @property priceImpact in format = 10 (means 10%)
+     */
+    data class HighPriceImpact(val priceImpact: Int) : SwapWarning
 }

 enum class GenericWarningType {
--- a/features/swap/presentation/src/main/java/com/tangem/feature/swap/ui/StateBuilder.kt
+++ b/features/swap/presentation/src/main/java/com/tangem/feature/swap/ui/StateBuilder.kt
@ -124,6 +124,10 @@ internal class StateBuilder(val actions: UiActions) {
        if (!quoteModel.preparedSwapConfigState.isBalanceEnough) {
            warnings.add(SwapWarning.InsufficientFunds)
        }
+
+        if (quoteModel.priceImpact > PRICE_IMPACT_THRESHOLD) {
+            warnings.add(SwapWarning.HighPriceImpact((quoteModel.priceImpact * HUNDRED_PERCENTS).toInt()))
+        }
        val feeState = if (quoteModel.preparedSwapConfigState.isFeeEnough) {
            FeeState.Loaded(tangemFee = quoteModel.tangemFee, fee = quoteModel.fee)
        } else {
@ -358,5 +362,7 @@ internal class StateBuilder(val actions: UiActions) {
        const val ADDRESS_MIN_LENGTH = 11
        const val ADDRESS_FIRST_PART_LENGTH = 7
        const val ADDRESS_SECOND_PART_LENGTH = 4
+        private const val PRICE_IMPACT_THRESHOLD = 0.1
+        private const val HUNDRED_PERCENTS = 100
    }
 }
--- a/features/swap/presentation/src/main/java/com/tangem/feature/swap/ui/SwapScreenContent.kt
+++ b/features/swap/presentation/src/main/java/com/tangem/feature/swap/ui/SwapScreenContent.kt
@ -161,6 +161,7 @@ private fun MainInfo(state: SwapStateHolder) {
            getActiveIconRes(state.blockchainId)
        }
        val (topCard, bottomCard, button) = createRefs()
+        val priceImpactWarning = state.warnings.filterIsInstance<SwapWarning.HighPriceImpact>().firstOrNull()
        TransactionCard(
            type = state.sendCardData.type,
            balance = state.sendCardData.balance,
@ -168,6 +169,7 @@ private fun MainInfo(state: SwapStateHolder) {
            amountEquivalent = state.sendCardData.amountEquivalent,
            tokenIconUrl = state.sendCardData.tokenIconUrl,
            tokenCurrency = state.sendCardData.tokenCurrency,
+            priceImpact = priceImpactWarning,
            networkIconRes = if (state.sendCardData.isNotNativeToken) networkIconRes else null,
            iconPlaceholder = state.sendCardData.coinId?.let {
                getActiveIconResByCoinId(it, state.networkId)
@ -185,6 +187,7 @@ private fun MainInfo(state: SwapStateHolder) {
            amountEquivalent = state.receiveCardData.amountEquivalent,
            tokenIconUrl = state.receiveCardData.tokenIconUrl,
            tokenCurrency = state.receiveCardData.tokenCurrency,
+            priceImpact = priceImpactWarning,
            networkIconRes = if (state.receiveCardData.isNotNativeToken) networkIconRes else null,
            iconPlaceholder = state.receiveCardData.coinId?.let {
                getActiveIconResByCoinId(it, state.networkId)
@ -289,9 +292,12 @@ private fun SwapWarnings(
    ) {
        warnings.forEach { warning ->
            when (warning) {
-                // SwapWarning.HighPriceImpact -> {
-                //     WarningCard(title = stringResource(id = R.string.), description = stringResource(id = R.string.))
-                // }
+                is SwapWarning.HighPriceImpact -> {
+                    WarningCard(
+                        title = stringResource(id = R.string.swapping_high_price_impact),
+                        description = stringResource(id = R.string.swapping_high_price_impact_description),
+                    )
+                }
                is SwapWarning.PermissionNeeded -> {
                    WarningCard(
                        title = stringResource(id = R.string.swapping_permission_header),
--- a/features/swap/presentation/src/main/java/com/tangem/feature/swap/ui/TransactionCard.kt
+++ b/features/swap/presentation/src/main/java/com/tangem/feature/swap/ui/TransactionCard.kt
@ -32,6 +32,9 @@ import androidx.compose.ui.graphics.Color
 import androidx.compose.ui.platform.LocalContext
 import androidx.compose.ui.res.painterResource
 import androidx.compose.ui.res.stringResource
+import androidx.compose.ui.text.AnnotatedString
+import androidx.compose.ui.text.SpanStyle
+import androidx.compose.ui.text.buildAnnotatedString
 import androidx.compose.ui.text.input.TextFieldValue
 import androidx.compose.ui.text.style.TextAlign
 import androidx.compose.ui.tooling.preview.Preview
@ -45,7 +48,9 @@ import com.tangem.core.ui.components.ResizableText
 import com.tangem.core.ui.components.SpacerH4
 import com.tangem.core.ui.components.SpacerH8
 import com.tangem.core.ui.components.SpacerW16
+import com.tangem.core.ui.components.SpacerW4
 import com.tangem.core.ui.res.TangemTheme
+import com.tangem.feature.swap.models.SwapWarning
 import com.tangem.feature.swap.models.TransactionCardType
 import com.valentinilk.shimmer.shimmer

@ -57,6 +62,7 @@ fun TransactionCard(
    tokenIconUrl: String,
    tokenCurrency: String,
    amountEquivalent: String?,
+    priceImpact: SwapWarning.HighPriceImpact?,
    textFieldValue: TextFieldValue?,
    modifier: Modifier = Modifier,
    @DrawableRes iconPlaceholder: Int? = null,
@ -82,6 +88,7 @@ fun TransactionCard(
                    type = type,
                    amountEquivalent = amountEquivalent,
                    textFieldValue = textFieldValue,
+                    priceImpact = priceImpact,
                )
            }

@ -171,6 +178,7 @@ private fun Header(
 private fun Content(
    type: TransactionCardType,
    amountEquivalent: String?,
+    priceImpact: SwapWarning.HighPriceImpact?,
    textFieldValue: TextFieldValue?,
 ) {
    Row(
@ -227,12 +235,34 @@ private fun Content(
            SpacerH8()

            if (amountEquivalent != null) {
-                Text(
-                    text = amountEquivalent,
-                    color = TangemTheme.colors.text.tertiary,
-                    style = TangemTheme.typography.body2,
-                    modifier = Modifier.defaultMinSize(minHeight = TangemTheme.dimens.size20),
-                )
+                if (type is TransactionCardType.ReceiveCard && priceImpact != null) {
+                    Row {
+                        Text(
+                            text = makePriceImpactBalanceWarning(amountEquivalent, priceImpact.priceImpact),
+                            color = TangemTheme.colors.text.tertiary,
+                            style = TangemTheme.typography.body2,
+                            modifier = Modifier
+                                .defaultMinSize(minHeight = TangemTheme.dimens.size20)
+                                .align(Alignment.CenterVertically),
+                        )
+                        SpacerW4()
+                        Icon(
+                            painter = painterResource(id = R.drawable.ic_alert_24),
+                            contentDescription = null,
+                            tint = TangemTheme.colors.icon.attention,
+                            modifier = Modifier
+                                .size(size = TangemTheme.dimens.size20)
+                                .align(Alignment.CenterVertically),
+                        )
+                    }
+                } else {
+                    Text(
+                        text = amountEquivalent,
+                        color = TangemTheme.colors.text.tertiary,
+                        style = TangemTheme.typography.body2,
+                        modifier = Modifier.defaultMinSize(minHeight = TangemTheme.dimens.size20),
+                    )
+                }
            } else {
                Box(
                    modifier = Modifier
@ -339,6 +369,19 @@ fun ChangeTokenSelector() {
    }
 }

+@Composable
+private fun makePriceImpactBalanceWarning(value: String, priceImpactPercents: Int): AnnotatedString {
+    val fullValue = "$value (-$priceImpactPercents%)"
+    return buildAnnotatedString {
+        append(fullValue)
+        addStyle(
+            style = SpanStyle(color = TangemTheme.colors.text.attention),
+            start = value.length,
+            end = fullValue.length,
+        )
+    }
+}
+
@Composable
 private fun TokenImageShimmer(
    modifier: Modifier = Modifier,
@ -384,6 +427,7 @@ private fun TransactionCardPreview() {
        onChangeTokenClick = {},
        balance = "123",
        textFieldValue = TextFieldValue(),
+        priceImpact = null,
    )
 }