diff --git a/configs/coins/bcash.json b/configs/coins/bcash.json
index 5bc080df..2a50d96a 100644
--- a/configs/coins/bcash.json
+++ b/configs/coins/bcash.json
@@ -63,4 +63,4 @@
     "package_maintainer": "Petr Kracik",
     "package_maintainer_email": "petr.kracik@satoshilabs.com"
   }
-}
+}
\ No newline at end of file
diff --git a/configs/coins/bcash_testnet.json b/configs/coins/bcash_testnet.json
index af05e7eb..765e073c 100644
--- a/configs/coins/bcash_testnet.json
+++ b/configs/coins/bcash_testnet.json
@@ -63,4 +63,4 @@
     "package_maintainer": "Petr Kracik",
     "package_maintainer_email": "petr.kracik@satoshilabs.com"
   }
-}
+}
\ No newline at end of file
diff --git a/configs/coins/bitcoin.json b/configs/coins/bitcoin.json
index c9dbf261..12077b54 100644
--- a/configs/coins/bitcoin.json
+++ b/configs/coins/bitcoin.json
@@ -58,11 +58,14 @@
       "xpub_magic": 76067358,
       "xpub_magic_segwit_p2sh": 77429938,
       "xpub_magic_segwit_native": 78792518,
-      "additional_params": {}
+      "additional_params": {
+        "alternativeEstimateFee": "whatthefee",
+        "alternativeEstimateFeeParams": "{\"url\": \"https://whatthefee.io/data.json\", \"periodSeconds\": 60}"
+      }
     }
   },
   "meta": {
-    "package_maintainer": "Jakub Matys",
-    "package_maintainer_email": "jakub.matys@satoshilabs.com"
+    "package_maintainer": "Martin Bohm",
+    "package_maintainer_email": "martin.bohm@satoshilabs.com"
   }
 }
\ No newline at end of file
diff --git a/configs/coins/bitcoin_testnet.json b/configs/coins/bitcoin_testnet.json
index d137099c..581f7d7b 100644
--- a/configs/coins/bitcoin_testnet.json
+++ b/configs/coins/bitcoin_testnet.json
@@ -59,11 +59,14 @@
       "xpub_magic_segwit_p2sh": 71979618,
       "xpub_magic_segwit_native": 73342198,
       "slip44": 1,
-      "additional_params": {}
+      "additional_params": {
+        "alternativeEstimateFee": "whatthefee",
+        "alternativeEstimateFeeParams": "{\"url\": \"https://whatthefee.io/data.json\", \"periodSeconds\": 60}"
+      }
     }
   },
   "meta": {
-    "package_maintainer": "Jakub Matys",
-    "package_maintainer_email": "jakub.matys@satoshilabs.com"
+    "package_maintainer": "Martin Bohm",
+    "package_maintainer_email": "martin.bohm@satoshilabs.com"
   }
 }
\ No newline at end of file
diff --git a/configs/coins/dash.json b/configs/coins/dash.json
index c4e4581a..6448bbc3 100644
--- a/configs/coins/dash.json
+++ b/configs/coins/dash.json
@@ -65,4 +65,4 @@
     "package_maintainer": "Petr Kracik",
     "package_maintainer_email": "petr.kracik@satoshilabs.com"
   }
-}
+}
\ No newline at end of file
diff --git a/configs/coins/dash_testnet.json b/configs/coins/dash_testnet.json
index 974ea71e..e0fe2e5b 100644
--- a/configs/coins/dash_testnet.json
+++ b/configs/coins/dash_testnet.json
@@ -65,4 +65,4 @@
     "package_maintainer": "Petr Kracik",
     "package_maintainer_email": "petr.kracik@satoshilabs.com"
   }
-}
+}
\ No newline at end of file
diff --git a/configs/coins/digibyte.json b/configs/coins/digibyte.json
index 4f879ee3..b6478089 100644
--- a/configs/coins/digibyte.json
+++ b/configs/coins/digibyte.json
@@ -63,7 +63,7 @@
     }
   },
   "meta": {
-    "package_maintainer": "Martin Boehm",
+    "package_maintainer": "Martin Bohm",
     "package_maintainer_email": "martin.bohm@satoshilabs.com"
   }
 }
\ No newline at end of file
diff --git a/configs/coins/litecoin_testnet.json b/configs/coins/litecoin_testnet.json
index 022f9217..8fbab0d2 100644
--- a/configs/coins/litecoin_testnet.json
+++ b/configs/coins/litecoin_testnet.json
@@ -1,7 +1,7 @@
 {
   "coin": {
     "name": "Litecoin Testnet",
-    "shortcut": "TLTC",
+    "shortcut": "tLTC",
     "label": "Litecoin Testnet",
     "alias": "litecoin_testnet"
   },
diff --git a/configs/coins/polis.json b/configs/coins/polis.json
index 18fd67b1..48f5f124 100644
--- a/configs/coins/polis.json
+++ b/configs/coins/polis.json
@@ -1,9 +1,9 @@
 {
   "coin": {
-      "name": "Polis",
-      "shortcut": "POLIS",
-      "label": "Polis",
-      "alias": "polis"
+    "name": "Polis",
+    "shortcut": "POLIS",
+    "label": "Polis",
+    "alias": "polis"
   },
   "ports": {
     "backend_rpc": 8067,
@@ -28,8 +28,8 @@
     "verification_source": "9688beeb4c789c2b20f4277f7363fcc986fb0e6cc75127179663272642fafcd3",
     "extract_command": "tar -C backend --strip 1 -xf",
     "exclude_files": [
-       "bin/polis-qt"
-    ],  
+      "bin/polis-qt"
+    ],
     "exec_command_template": "{{.Env.BackendInstallPath}}/{{.Coin.Alias}}/bin/polisd -datadir={{.Env.BackendDataPath}}/{{.Coin.Alias}}/backend -conf={{.Env.BackendInstallPath}}/{{.Coin.Alias}}/{{.Coin.Alias}}.conf -pid=/run/{{.Coin.Alias}}/{{.Coin.Alias}}.pid",
     "logrotate_files_template": "{{.Env.BackendDataPath}}/{{.Coin.Alias}}/backend/*.log",
     "postinst_script_template": "",
@@ -40,7 +40,7 @@
     "server_config_file": "bitcoin_like.conf",
     "client_config_file": "bitcoin_like_client.conf",
     "additional_params": {
-        "mempoolexpiry": 72
+      "mempoolexpiry": 72
     }
   },
   "blockbook": {
@@ -56,6 +56,8 @@
       "mempool_workers": 8,
       "mempool_sub_workers": 2,
       "block_addresses_to_keep": 300,
+      "xpub_magic": 65166718,
+      "slip44": 1997,
       "additional_params": {}
     }
   },
@@ -63,4 +65,4 @@
     "package_maintainer": "Cronos",
     "package_maintainer_email": "eabz@polispay.org"
   }
-}
+}
\ No newline at end of file
diff --git a/configs/coins/zcash.json b/configs/coins/zcash.json
index 4c635f56..093d051f 100644
--- a/configs/coins/zcash.json
+++ b/configs/coins/zcash.json
@@ -64,4 +64,4 @@
     "package_maintainer": "Petr Kracik",
     "package_maintainer_email": "petr.kracik@satoshilabs.com"
   }
-}
+}
\ No newline at end of file
diff --git a/configs/coins/zcash_testnet.json b/configs/coins/zcash_testnet.json
index 3fc370ff..6beb9fd3 100644
--- a/configs/coins/zcash_testnet.json
+++ b/configs/coins/zcash_testnet.json
@@ -64,4 +64,4 @@
     "package_maintainer": "Petr Kracik",
     "package_maintainer_email": "petr.kracik@satoshilabs.com"
   }
-}
+}
\ No newline at end of file