Add TransferPriceImpactValidator (#762)

build.gradle.kts

@@ -52,7 +52,7 @@ allprojects {
 }
 
 group = "exchange.dydx.abacus"
-version = "1.13.36"
+version = "1.13.37"
 
 repositories {
     google()

src/commonMain/kotlin/exchange.dydx.abacus/validator/TransferInputValidator.kt

@@ -11,6 +11,7 @@ import exchange.dydx.abacus.state.manager.V4Environment
 import exchange.dydx.abacus.validator.transfer.DepositValidator
 import exchange.dydx.abacus.validator.transfer.TransferFieldsValidator
 import exchange.dydx.abacus.validator.transfer.TransferOutValidator
+import exchange.dydx.abacus.validator.transfer.TransferPriceImpactValidator
 import exchange.dydx.abacus.validator.transfer.WithdrawalCapacityValidator
 import exchange.dydx.abacus.validator.transfer.WithdrawalGatingValidator
 
@@ -25,6 +26,7 @@ internal class TransferInputValidator(
         TransferOutValidator(localizer, formatter, parser),
         WithdrawalGatingValidator(localizer, formatter, parser),
         WithdrawalCapacityValidator(localizer, formatter, parser),
+        TransferPriceImpactValidator(localizer, formatter, parser),
     )
 
     override fun validate(

src/commonMain/kotlin/exchange.dydx.abacus/validator/transfer/TransferPriceImpactValidator.kt

@@ -0,0 +1,64 @@
+package exchange.dydx.abacus.validator.transfer
+
+import exchange.dydx.abacus.output.input.ErrorType
+import exchange.dydx.abacus.output.input.TransferType
+import exchange.dydx.abacus.output.input.ValidationError
+import exchange.dydx.abacus.protocols.LocalizerProtocol
+import exchange.dydx.abacus.protocols.ParserProtocol
+import exchange.dydx.abacus.state.app.helper.Formatter
+import exchange.dydx.abacus.state.internalstate.InternalState
+import exchange.dydx.abacus.state.manager.BlockAndTime
+import exchange.dydx.abacus.state.manager.V4Environment
+import exchange.dydx.abacus.validator.BaseInputValidator
+import exchange.dydx.abacus.validator.TransferValidatorProtocol
+
+internal class TransferPriceImpactValidator(
+    localizer: LocalizerProtocol?,
+    formatter: Formatter?,
+    parser: ParserProtocol,
+) : BaseInputValidator(localizer, formatter, parser), TransferValidatorProtocol {
+    override fun validateTransfer(
+        internalState: InternalState,
+        currentBlockAndHeight: BlockAndTime?,
+        restricted: Boolean,
+        environment: V4Environment?
+    ): List<ValidationError>? {
+        val transfer = internalState.input.transfer
+        val type = transfer.type ?: return null
+        val aggregatePriceImpact = transfer.summary?.aggregatePriceImpact ?: return null
+
+        val maxPriceImpact = 0.02 // 2%
+
+        when (type) {
+            TransferType.deposit, TransferType.withdrawal -> {
+                if (aggregatePriceImpact >= maxPriceImpact) {
+                    return listOf(
+                        error(
+                            type = ErrorType.error,
+                            errorCode = "PRICE_IMPACT_TOO_HIGH",
+                            fields = null,
+                            actionStringKey = null,
+                            titleStringKey = "APP.TRADE.PRICE_IMPACT",
+                            textStringKey = "ERRORS.ONBOARDING.PRICE_IMPACT_TOO_HIGH",
+                        ),
+                    )
+                } else {
+                    return null
+                }
+            }
+            TransferType.transferOut -> return null
+        }
+    }
+
+    override fun validateTransferDeprecated(
+        wallet: Map<String, Any>?,
+        subaccount: Map<String, Any>?,
+        transfer: Map<String, Any>,
+        configs: Map<String, Any>?,
+        currentBlockAndHeight: BlockAndTime?,
+        restricted: Boolean,
+        environment: V4Environment?
+    ): List<Any>? {
+        return null
+    }
+}

v4_abacus.podspec

@@ -1,6 +1,6 @@
 Pod::Spec.new do |spec|
     spec.name                     = 'v4_abacus'
-    spec.version                  = '1.13.36'
+    spec.version                  = '1.13.37'
     spec.homepage                 = 'https://github.com/dydxprotocol/v4-abacus'
     spec.source                   = { :http=> ''}
     spec.authors                  = ''