add chain lambda.json

src/chains/mainnet/lambda.json

@@ -0,0 +1,20 @@
+{
+    "chain_name": "lambda",
+    "api": ["https://rest.lambda.im", "https://api.lambda.nodestake.top", "https://lambda-api.jambulmerah.dev"],
+    "rpc": ["https://rpc.lambda.im", "https://rpc.lambda.nodestake.top", "https://lambda-rpc.jambulmerah.dev"],
+    "sdk_version": "0.45.6",
+    "coin_type": "60",
+    "min_tx_fee": "5000",
+    "addr_prefix": "lamb",
+    "logo": "/logos/lambda.png",
+    "keplr_features": ["ibc-transfer", "ibc-go", "eth-address-gen", "eth-key-sign"],
+    "assets": [
+      {
+        "base": "ulamb",
+        "symbol": "LAMB",
+        "exponent": "18",
+        "coingecko_id": "lambda",
+        "logo": "/logos/lambda.png"
+      }
+    ]
+  }