Update param with nillion

chain/nillion/param_2.json

@@ -1,4 +1,50 @@
 {
+    "chain_id_cosmos" : "nillion-1",
+    "chain_name": "Nillion",
+    "chain_image": "https://raw.githubusercontent.com/cosmostation/chainlist/master/chain/nillion/resource/chain_nillion.png",
+    "main_asset_denom" : "unil",
+    "main_asset_symbol" : "NIL",
+    "main_asset_image": "https://raw.githubusercontent.com/cosmostation/chainlist/master/chain/nillion/asset/nil.png",
+    "bech_account_prefix" : "nillion",
+    "bech_validator_prefix" : "nillionvaloper",
+    "origin_genesis_time" : "2025-02-12T17:00:00Z",
+    "api_name" : "nillion",
+    "is_support_mintscan": true,
+    "is_support_mobile_wallet": true,
+    "is_support_moblie_dapp" : true,
+    "is_support_extension_wallet": true,
+    "chain_type": [
+        "cosmos"
+    ],
+    "account_type" : [
+        {
+            "hd_path": "m/44'/118'/0'/0/X",
+            "pubkey_style": "secp256k1",
+            "pubkey_type": "/cosmos.crypto.secp256k1.PubKey"
+        }
+    ],
+    "cosmos_fee_info" : {
+        "base" : "0",
+        "rate" : [
+            "0.025unil"
+        ],
+        "is_simulable" : true,
+        "simulated_gas_multiply" : 1.3,
+        "init_gas_limit" : 300000,
+        "fee_threshold" : ""
+    },
+    "grpc_endpoint" : [
+        {
+            "provider": "Cosmostation",
+            "url": "grpc-nillion.cosmostation.io:443"
+        }
+    ],
+    "lcd_endpoint" : [
+        {
+            "provider": "Cosmostation",
+            "url": "https://lcd-nillion.cosmostation.io/"
+        }
+    ],
     "explorer" : {
         "name": "Mintscan",
         "url": "https://www.mintscan.io/nillion/",