fix: use PezkuwiCheckMortality for WalletConnect sign requests

PolkadotExternalSignInteractor and ExtrinsicSplitter were using standard
CheckMortality which fails with pezsp_runtime DictEnum Era type.
Added isPezkuwiChain detection and routing to custom extensions.

feature-account-impl/src/main/java/io/novafoundation/nova/feature_account_impl/data/extrinsic/ExtrinsicSplitter.kt

@@ -10,6 +10,7 @@ import io.novafoundation.nova.feature_account_api.data.extrinsic.ExtrinsicSplitt
 import io.novafoundation.nova.feature_account_api.data.extrinsic.SplitCalls
 import io.novafoundation.nova.runtime.ext.requireGenesisHash
 import io.novafoundation.nova.runtime.extrinsic.CustomTransactionExtensions
+import io.novafoundation.nova.runtime.extrinsic.extensions.PezkuwiCheckImmortal
 import io.novafoundation.nova.runtime.extrinsic.multi.CallBuilder
 import io.novafoundation.nova.runtime.multiNetwork.ChainRegistry
 import io.novafoundation.nova.runtime.multiNetwork.chain.model.Chain
@@ -141,12 +142,19 @@ internal class RealExtrinsicSplitter @Inject constructor(
     ): SendableExtrinsic {
         val genesisHash = chain.requireGenesisHash().fromHex()
 
+        val isPezkuwi = runtime.metadata.extrinsic.signedExtensions.any { it.id == "AuthorizeCall" }
+
         return ExtrinsicBuilder(
             runtime = runtime,
             extrinsicVersion = ExtrinsicVersion.V4,
             batchMode = BatchMode.BATCH,
         ).apply {
-            setTransactionExtension(CheckMortality(Era.Immortal, genesisHash))
+            // Use custom CheckMortality for Pezkuwi chains to avoid DictEnum type lookup issues
+            if (isPezkuwi) {
+                setTransactionExtension(PezkuwiCheckImmortal(genesisHash))
+            } else {
+                setTransactionExtension(CheckMortality(Era.Immortal, genesisHash))
+            }
             setTransactionExtension(CheckGenesis(chain.requireGenesisHash().fromHex()))
             setTransactionExtension(ChargeTransactionPayment(BigInteger.ZERO))
             setTransactionExtension(CheckMetadataHash(CheckMetadataHashMode.Disabled))

feature-external-sign-impl/src/main/java/io/novafoundation/nova/feature_external_sign_impl/domain/sign/polkadot/PolkadotExternalSignInteractor.kt

@@ -39,6 +39,8 @@ import io.novafoundation.nova.runtime.ext.anyAddressToAccountId
 import io.novafoundation.nova.runtime.ext.utilityAsset
 import io.novafoundation.nova.runtime.extrinsic.CustomTransactionExtensions
 import io.novafoundation.nova.runtime.extrinsic.extensions.ChargeAssetTxPayment.Companion.chargeAssetTxPayment
+import io.novafoundation.nova.runtime.extrinsic.extensions.PezkuwiCheckImmortal
+import io.novafoundation.nova.runtime.extrinsic.extensions.PezkuwiCheckMortality
 import io.novafoundation.nova.runtime.extrinsic.metadata.MetadataShortenerService
 import io.novafoundation.nova.runtime.multiNetwork.ChainRegistry
 import io.novafoundation.nova.runtime.multiNetwork.chain.model.Chain
@@ -48,6 +50,7 @@ import io.novasama.substrate_sdk_android.extensions.fromHex
 import io.novasama.substrate_sdk_android.runtime.AccountId
 import io.novasama.substrate_sdk_android.runtime.RuntimeSnapshot
 import io.novasama.substrate_sdk_android.runtime.definitions.types.fromHex
+import io.novasama.substrate_sdk_android.runtime.definitions.types.generics.Era
 import io.novasama.substrate_sdk_android.runtime.definitions.types.generics.EraType
 import io.novasama.substrate_sdk_android.runtime.definitions.types.generics.GenericCall
 import io.novasama.substrate_sdk_android.runtime.extrinsic.BatchMode
@@ -221,9 +224,19 @@ class PolkadotExternalSignInteractor(
 
         val signingContext = signingContextFactory.default(chain)
 
+        val isPezkuwi = isPezkuwiChain(runtime)
+
         val extrinsic = with(parsedExtrinsic) {
             ExtrinsicBuilder(runtime, ExtrinsicVersion.V4, BatchMode.BATCH_ALL).apply {
-                setTransactionExtension(CheckMortality(era, blockHash))
+                // Use custom CheckMortality for Pezkuwi chains to avoid DictEnum type lookup issues
+                if (isPezkuwi) {
+                    when (era) {
+                        is Era.Mortal -> setTransactionExtension(PezkuwiCheckMortality(era, blockHash))
+                        is Era.Immortal -> setTransactionExtension(PezkuwiCheckImmortal(genesisHash))
+                    }
+                } else {
+                    setTransactionExtension(CheckMortality(era, blockHash))
+                }
                 setTransactionExtension(CheckGenesis(genesisHash))
                 setTransactionExtension(ChargeTransactionPayment(tip))
                 setTransactionExtension(CheckMetadataHash(actualMetadataHash.checkMetadataHash))
@@ -350,6 +363,11 @@ class PolkadotExternalSignInteractor(
     private fun PolkadotSignPayload.Json.tryDecodeAssetId(runtime: RuntimeSnapshot): Any? {
         return assetId?.let(runtime::decodeCustomTxPaymentId)
     }
+
+    private fun isPezkuwiChain(runtime: RuntimeSnapshot): Boolean {
+        val signedExtIds = runtime.metadata.extrinsic.signedExtensions.map { it.id }
+        return signedExtIds.any { it == "AuthorizeCall" }
+    }
 }
 
 private fun CheckMetadataHashMode(hash: ByteArray?): CheckMetadataHashMode {