diff --git a/ethereumkit/src/main/java/io/horizontalsystems/ethereumkit/models/Chain.kt b/ethereumkit/src/main/java/io/horizontalsystems/ethereumkit/models/Chain.kt
index c39d49a9..0cb9e280 100644
--- a/ethereumkit/src/main/java/io/horizontalsystems/ethereumkit/models/Chain.kt
+++ b/ethereumkit/src/main/java/io/horizontalsystems/ethereumkit/models/Chain.kt
@@ -14,7 +14,9 @@ enum class Chain(
     Avalanche(43114, 60, 15, true),
     Gnosis(100, 60, 15, true),
     Fantom(250, 60, 15, false),
-    EthereumGoerli(5, 1, 15, true);
+    EthereumGoerli(5, 1, 15, true),
+    ArbitrumGoerli(421613,1,5,false),
+    Mumbai(80001,1,5,true);
 
     val isMainNet = coinType != 1
 }
diff --git a/ethereumkit/src/main/java/io/horizontalsystems/ethereumkit/models/RpcSource.kt b/ethereumkit/src/main/java/io/horizontalsystems/ethereumkit/models/RpcSource.kt
index 08b6f49a..037f6aeb 100644
--- a/ethereumkit/src/main/java/io/horizontalsystems/ethereumkit/models/RpcSource.kt
+++ b/ethereumkit/src/main/java/io/horizontalsystems/ethereumkit/models/RpcSource.kt
@@ -80,5 +80,13 @@ sealed class RpcSource() {
             return Http(listOf(URL("https://rpc.fantom.network")), null)
         }
 
+        fun arbitrumGoerliRpcHttp(): Http {
+            return Http(listOf(URL("https://goerli-rollup.arbitrum.io/rpc")), null)
+        }
+
+        fun mumbaiRpcHttp(): Http {
+            return Http(listOf(URL("https://matic-mumbai.chainstacklabs.com")), null)
+        }
+
     }
 }
diff --git a/ethereumkit/src/main/java/io/horizontalsystems/ethereumkit/models/TransactionSource.kt b/ethereumkit/src/main/java/io/horizontalsystems/ethereumkit/models/TransactionSource.kt
index 49447302..6a33aedc 100644
--- a/ethereumkit/src/main/java/io/horizontalsystems/ethereumkit/models/TransactionSource.kt
+++ b/ethereumkit/src/main/java/io/horizontalsystems/ethereumkit/models/TransactionSource.kt
@@ -76,6 +76,20 @@ class TransactionSource(val name: String, val type: SourceType) {
             )
         }
 
+        fun goerliArbiscan(apiKey: String): TransactionSource {
+            return TransactionSource(
+                "goerli.arbiscan.io",
+                SourceType.Etherscan("https://api-goerli.arbiscan.io", "https://goerli.arbiscan.io/", apiKey)
+            )
+        }
+
+        fun mumbaiPolygonscan(apiKey: String): TransactionSource {
+            return TransactionSource(
+                "mumbai.polygonscan.com",
+                SourceType.Etherscan("https://api-testnet.polygonscan.com/", "https://mumbai.polygonscan.com", apiKey)
+            )
+        }
+
     }
 
 }