diff --git a/data/wallet-connect/src/main/kotlin/com/tangem/data/walletconnect/network/ethereum/WcEthNetwork.kt b/data/wallet-connect/src/main/kotlin/com/tangem/data/walletconnect/network/ethereum/WcEthNetwork.kt
index 0f9e21543f..fe375b57d6 100644
--- a/data/wallet-connect/src/main/kotlin/com/tangem/data/walletconnect/network/ethereum/WcEthNetwork.kt
+++ b/data/wallet-connect/src/main/kotlin/com/tangem/data/walletconnect/network/ethereum/WcEthNetwork.kt
@@ -6,9 +6,11 @@ import arrow.core.left
 import arrow.core.right
 import com.squareup.moshi.Moshi
 import com.tangem.blockchain.common.Blockchain
+import com.tangem.blockchain.extensions.hexToInt
 import com.tangem.blockchainsdk.utils.ExcludedBlockchains
 import com.tangem.data.walletconnect.model.CAIP2
 import com.tangem.data.walletconnect.model.NamespaceKey
+import com.tangem.data.walletconnect.network.ethereum.WcEthNetwork.NamespaceConverter.Companion.ETH_NAMESPACE_KEY
 import com.tangem.data.walletconnect.request.WcRequestToUseCaseConverter
 import com.tangem.data.walletconnect.request.WcRequestToUseCaseConverter.Companion.fromJson
 import com.tangem.data.walletconnect.sign.WcMethodUseCaseContext
@@ -113,8 +115,10 @@ internal class WcEthNetwork(
                 .getOrElse { return it.left() }
                 ?.firstOrNull()
                 ?.let {
+                    val caip2 = CAIP2.fromRaw("$ETH_NAMESPACE_KEY:${it.chainId.hexToInt()}")
+                        ?: return null.right()
                     val newNetwork = networksConverter
-                        .mainOrAnyWalletNetworkForRequest(it.chainId, wallet)
+                        .mainOrAnyWalletNetworkForRequest(caip2.raw, wallet)
                         ?: return null.right()
                     WcEthMethod.AddEthereumChain(rawChain = it, network = newNetwork).right()
                 }
@@ -147,13 +151,17 @@ internal class WcEthNetwork(
         override val excludedBlockchains: ExcludedBlockchains,
     ) : WcNamespaceConverter {
 
-        override val namespaceKey: NamespaceKey = NamespaceKey("eip155")
+        override val namespaceKey: NamespaceKey = NamespaceKey(ETH_NAMESPACE_KEY)
 
         override fun toBlockchain(chainId: CAIP2): Blockchain? {
             if (chainId.namespace != namespaceKey.key) return null
             val ethChainId = chainId.reference.toIntOrNull() ?: return null
             return Blockchain.fromChainId(ethChainId)
         }
+
+        companion object {
+            const val ETH_NAMESPACE_KEY = "eip155"
+        }
     }
 
     internal class Factories @Inject constructor(
diff --git a/domain/wallet-connect/models/src/main/java/com/tangem/domain/walletconnect/model/WcEthAddChain.kt b/domain/wallet-connect/models/src/main/java/com/tangem/domain/walletconnect/model/WcEthAddChain.kt
index 9daf8154a1..33633558c4 100644
--- a/domain/wallet-connect/models/src/main/java/com/tangem/domain/walletconnect/model/WcEthAddChain.kt
+++ b/domain/wallet-connect/models/src/main/java/com/tangem/domain/walletconnect/model/WcEthAddChain.kt
@@ -5,6 +5,11 @@ import com.squareup.moshi.JsonClass
 
 @JsonClass(generateAdapter = true)
 data class WcEthAddChain(
+    /**
+     * chainId are identified by EIP-155 integers expressed in hexadecimal notation,
+     * with 0x prefix and no leading zeroes for the chainId value.
+     * For more information https://eips.ethereum.org/EIPS/eip-5792#atomicbatch-capability
+     */
     @Json(name = "chainId")
     val chainId: String,
 )
\ No newline at end of file
diff --git a/domain/wallet-connect/models/src/main/java/com/tangem/domain/walletconnect/model/WcEthMethod.kt b/domain/wallet-connect/models/src/main/java/com/tangem/domain/walletconnect/model/WcEthMethod.kt
index 24a4878ec4..afb348e77e 100644
--- a/domain/wallet-connect/models/src/main/java/com/tangem/domain/walletconnect/model/WcEthMethod.kt
+++ b/domain/wallet-connect/models/src/main/java/com/tangem/domain/walletconnect/model/WcEthMethod.kt
@@ -15,7 +15,7 @@ sealed interface WcEthMethod : WcMethod {
         val account: String,
         val dataForSign: String,
     ) : WcEthMethod {
-        val humanMsg: String = params.message.contents.orEmpty()
+        val humanMsg: String = params.message?.contents.orEmpty()
     }
 
     data class SendTransaction(
diff --git a/domain/wallet-connect/models/src/main/java/com/tangem/domain/walletconnect/model/WcEthSignTypedDataParams.kt b/domain/wallet-connect/models/src/main/java/com/tangem/domain/walletconnect/model/WcEthSignTypedDataParams.kt
index 0054a9c68c..b14e6af6df 100644
--- a/domain/wallet-connect/models/src/main/java/com/tangem/domain/walletconnect/model/WcEthSignTypedDataParams.kt
+++ b/domain/wallet-connect/models/src/main/java/com/tangem/domain/walletconnect/model/WcEthSignTypedDataParams.kt
@@ -6,24 +6,24 @@ import com.squareup.moshi.JsonClass
 @JsonClass(generateAdapter = true)
 data class WcEthSignTypedDataParams(
     @Json(name = "domain")
-    val domain: Domain,
+    val domain: Domain?,
     @Json(name = "message")
-    val message: Message,
+    val message: Message?,
     @Json(name = "primaryType")
-    val primaryType: String,
+    val primaryType: String?,
     @Json(name = "types")
     val types: Map<String, List<Types.Type>>,
 ) {
     @JsonClass(generateAdapter = true)
     data class Domain(
         @Json(name = "chainId")
-        val chainId: Int,
+        val chainId: Int?,
         @Json(name = "name")
-        val name: String,
+        val name: String?,
         @Json(name = "verifyingContract")
-        val verifyingContract: String,
+        val verifyingContract: String?,
         @Json(name = "version")
-        val version: String,
+        val version: String?,
     )
 
     @JsonClass(generateAdapter = true)