Updated on 2026-08-14
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Tangem
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ffa50554bd
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2 changed files with 198 additions and 1 deletions
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@ -61,8 +61,10 @@ internal class SwapAmountSelectQuoteTransformer(
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secondaryCryptoCurrencyStatus = prevState.secondaryCryptoCurrencyStatus,
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)
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val hasInsufficientFundsForFixed = hasInsufficientFundsForFixed(prevState, quoteContent)
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return prevState.copy(
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isPrimaryButtonEnabled = quoteUM is SwapQuoteUM.Content,
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isPrimaryButtonEnabled = quoteUM is SwapQuoteUM.Content && !hasInsufficientFundsForFixed,
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selectedQuote = quoteUM,
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isShowFCAWarning = isNeedApplyFCARestrictions && quoteUM.provider?.isRestrictedByFCA() == true,
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primaryAmount = newPrimaryAmount,
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@ -71,6 +73,16 @@ internal class SwapAmountSelectQuoteTransformer(
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)
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}
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private fun hasInsufficientFundsForFixed(
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prevState: SwapAmountUM.Content,
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quoteContent: SwapQuoteUM.Content?,
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): Boolean {
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if (prevState.selectedAmountType != SwapAmountType.To) return false
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val fromAmount = quoteContent?.fromAmount ?: return false
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val primaryBalance = prevState.primaryCryptoCurrencyStatus.value.amount ?: return false
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return fromAmount > primaryBalance
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}
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private fun getPrimaryAmount(
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prevState: SwapAmountUM.Content,
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quoteContent: SwapQuoteUM.Content?,
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@ -0,0 +1,185 @@
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package com.tangem.features.swap.v2.impl.amount.model.transformers
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import com.google.common.truth.Truth.assertThat
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import com.tangem.core.ui.extensions.TextReference
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import com.tangem.domain.express.models.ExpressError
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import com.tangem.domain.express.models.ExpressProvider
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import com.tangem.domain.express.models.ExpressProviderType
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import com.tangem.domain.express.models.ExpressRateType
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import com.tangem.domain.models.currency.CryptoCurrencyStatus
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import com.tangem.domain.swap.models.SwapAmountType
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import com.tangem.domain.swap.models.SwapCurrencies
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import com.tangem.domain.swap.models.SwapDirection
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import com.tangem.domain.swap.models.SwapRateMode
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import com.tangem.features.swap.v2.impl.amount.entity.SwapAmountFieldUM
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import com.tangem.features.swap.v2.impl.amount.entity.SwapAmountUM
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import com.tangem.features.swap.v2.impl.common.entity.SwapQuoteUM
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import io.mockk.every
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import io.mockk.mockk
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import kotlinx.collections.immutable.persistentListOf
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import org.junit.Test
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import java.math.BigDecimal
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internal class SwapAmountSelectQuoteTransformerTest {
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private val provider = ExpressProvider(
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providerId = "test-provider",
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name = "Test Provider",
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type = ExpressProviderType.CEX,
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imageLarge = "",
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termsOfUse = null,
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privacyPolicy = null,
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slippage = null,
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)
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@Test
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fun `GIVEN fixed mode quote with fromAmount exceeding primary balance WHEN transform THEN isPrimaryButtonEnabled is false`() {
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// GIVEN
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val prevState = buildContentState(
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selectedAmountType = SwapAmountType.To,
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primaryBalance = BigDecimal("10"),
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)
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val quote = buildContentQuote(fromAmount = BigDecimal("20"), toAmount = BigDecimal("1"))
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val transformer = buildTransformer(quoteUM = quote)
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// WHEN
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val result = transformer.transform(prevState)
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// THEN
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val content = result as SwapAmountUM.Content
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assertThat(content.isPrimaryButtonEnabled).isFalse()
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assertThat(content.selectedQuote).isEqualTo(quote)
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}
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@Test
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fun `GIVEN fixed mode quote with fromAmount within primary balance WHEN transform THEN isPrimaryButtonEnabled is true`() {
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// GIVEN
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val prevState = buildContentState(
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selectedAmountType = SwapAmountType.To,
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primaryBalance = BigDecimal("100"),
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)
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val quote = buildContentQuote(fromAmount = BigDecimal("20"), toAmount = BigDecimal("1"))
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val transformer = buildTransformer(quoteUM = quote)
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// WHEN
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val result = transformer.transform(prevState)
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// THEN
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val content = result as SwapAmountUM.Content
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assertThat(content.isPrimaryButtonEnabled).isTrue()
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}
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@Test
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fun `GIVEN float mode with selectedAmountType From WHEN transform THEN isPrimaryButtonEnabled is true regardless of fromAmount`() {
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// GIVEN
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val prevState = buildContentState(
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selectedAmountType = SwapAmountType.From,
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primaryBalance = BigDecimal("10"),
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)
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// fromAmount > balance, but we're in From-mode so the check must not fire
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val quote = buildContentQuote(fromAmount = BigDecimal("20"), toAmount = BigDecimal("1"))
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val transformer = buildTransformer(quoteUM = quote)
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// WHEN
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val result = transformer.transform(prevState)
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// THEN
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val content = result as SwapAmountUM.Content
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assertThat(content.isPrimaryButtonEnabled).isTrue()
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}
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@Test
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fun `GIVEN quote is SwapQuoteUM Error WHEN transform THEN isPrimaryButtonEnabled is false`() {
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// GIVEN
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val prevState = buildContentState(
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selectedAmountType = SwapAmountType.To,
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primaryBalance = BigDecimal("100"),
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)
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val errorQuote = SwapQuoteUM.Error(
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provider = provider,
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expressError = ExpressError.InternalError(code = 500),
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)
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val transformer = buildTransformer(quoteUM = errorQuote)
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// WHEN
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val result = transformer.transform(prevState)
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// THEN
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val content = result as SwapAmountUM.Content
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assertThat(content.isPrimaryButtonEnabled).isFalse()
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assertThat(content.selectedQuote).isEqualTo(errorQuote)
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}
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@Test
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fun `GIVEN prevState is SwapAmountUM Empty WHEN transform THEN returns the same state`() {
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// GIVEN
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val prevState = SwapAmountUM.Empty(swapDirection = SwapDirection.Direct)
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val quote = buildContentQuote(fromAmount = BigDecimal("20"), toAmount = BigDecimal("1"))
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val transformer = buildTransformer(quoteUM = quote)
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// WHEN
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val result = transformer.transform(prevState)
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// THEN
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assertThat(result).isEqualTo(prevState)
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}
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private fun buildTransformer(quoteUM: SwapQuoteUM): SwapAmountSelectQuoteTransformer {
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return SwapAmountSelectQuoteTransformer(
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quoteUM = quoteUM,
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secondaryMaximumAmountBoundary = null,
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secondaryMinimumAmountBoundary = null,
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isNeedApplyFCARestrictions = false,
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isBalanceHidden = false,
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primaryMaximumAmountBoundary = null,
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primaryMinimumAmountBoundary = null,
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primaryFiatRateUSD = null,
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secondaryFiatRateUSD = null,
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)
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}
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private fun buildContentQuote(fromAmount: BigDecimal, toAmount: BigDecimal): SwapQuoteUM.Content {
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return SwapQuoteUM.Content(
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provider = provider,
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toAmount = toAmount,
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fromAmount = fromAmount,
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toAmountValue = TextReference.EMPTY,
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fromAmountValue = TextReference.EMPTY,
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diffPercent = SwapQuoteUM.Content.DifferencePercent.Empty,
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isSingleProvider = true,
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rate = TextReference.EMPTY,
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quoteId = null,
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)
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}
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private fun buildContentState(
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selectedAmountType: SwapAmountType,
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primaryBalance: BigDecimal?,
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): SwapAmountUM.Content {
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val primaryStatus = mockk<CryptoCurrencyStatus>(relaxed = true).also { status ->
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every { status.value.amount } returns primaryBalance
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every { status.value.fiatRate } returns null
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every { status.value.fiatAmount } returns null
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every { status.currency.symbol } returns "BTC"
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every { status.currency.decimals } returns 8
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}
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return SwapAmountUM.Content(
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isPrimaryButtonEnabled = false,
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swapDirection = SwapDirection.Direct,
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selectedAmountType = selectedAmountType,
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primaryAmount = SwapAmountFieldUM.Empty(SwapAmountType.From),
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secondaryAmount = SwapAmountFieldUM.Empty(SwapAmountType.To),
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primaryCryptoCurrencyStatus = primaryStatus,
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secondaryCryptoCurrencyStatus = null,
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swapRateType = ExpressRateType.Fixed,
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swapRateMode = SwapRateMode.FIXED_ONLY,
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priceImpact = null,
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swapCurrencies = SwapCurrencies.EMPTY,
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swapQuotes = persistentListOf(),
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selectedQuote = SwapQuoteUM.Empty,
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isShowFCAWarning = false,
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appCurrency = null,
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isShowBestRateAnimation = false,
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)
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}
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}
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