added support of `nft` address metadata in `address_info/`

backend/moonstream/actions.py

@@ -57,6 +57,7 @@ def get_contract_source_info(
 class LabelNames(Enum):
     ETHERSCAN_SMARTCONTRACT = "etherscan_smartcontract"
     COINMARKETCAP_TOKEN = "coinmarketcap_token"
+    ERC721 = "erc721"
 
 
 def get_ethereum_address_info(
@@ -71,6 +72,7 @@ def get_ethereum_address_info(
 
     address_info = data.EthereumAddressInfo(address=address)
     etherscan_address_url = f"https://etherscan.io/address/{address}"
+    etherscan_token_url = f"https://etherscan.io/token/{address}"
     blockchain_com_url = f"https://www.blockchain.com/eth/address/{address}"
     # Checking for token:
     coinmarketcap_label: Optional[EthereumLabel] = (
@@ -87,7 +89,7 @@ def get_ethereum_address_info(
             symbol=coinmarketcap_label.label_data["symbol"],
             external_url=[
                 coinmarketcap_label.label_data["coinmarketcap_url"],
-                etherscan_address_url,
+                etherscan_token_url,
                 blockchain_com_url,
             ],
         )
@@ -107,6 +109,24 @@ def get_ethereum_address_info(
             external_url=[etherscan_address_url, blockchain_com_url],
         )
 
+    # Checking for NFT
+    # Checking for smart contract
+    erc721_label: Optional[EthereumLabel] = (
+        db_session.query(EthereumLabel)
+        .filter(EthereumLabel.address_id == id[0])
+        .filter(EthereumLabel.label == LabelNames.ERC721.value)
+        .order_by(text("created_at desc"))
+        .limit(1)
+        .one_or_none()
+    )
+    if erc721_label is not None:
+        address_info.nft = data.EthereumSmartContractDetails(
+            name=erc721_label.label_data.get("name"),
+            symbol=erc721_label.label_data.get("symbol"),
+            total_supplly=erc721_label.label_data.get("totalSupply"),
+            external_url=[etherscan_token_url, blockchain_com_url],
+        )
+
     return address_info
 
 

backend/moonstream/data.py

@@ -3,6 +3,8 @@ Pydantic schemas for the Moonstream HTTP API
 """
 from typing import List, Optional, Dict, Any
 
+from sqlalchemy.sql.selectable import alias
+
 from pydantic import BaseModel, Field
 
 
@@ -160,18 +162,23 @@ class EthereumSmartContractSourceInfo(BaseModel):
 class EthereumTokenDetails(BaseModel):
     name: Optional[str]
     symbol: Optional[str]
-    external_url: List[str] = []
+    external_url: List[str] = Field(default_factory=list)
 
 
 class EthereumSmartContractDetails(BaseModel):
     name: Optional[str]
-    external_url: List[str] = []
+    external_url: List[str] = Field(default_factory=list)
+
+
+class EthereumNFTDetails(EthereumTokenDetails):
+    total_supply: Optional[int] = Field(alias="totalSupply")
 
 
 class EthereumAddressInfo(BaseModel):
     address: str
     token: Optional[EthereumTokenDetails]
     smart_contract: Optional[EthereumSmartContractDetails]
+    nft: Optional[EthereumNFTDetails]
 
 
 class TxinfoEthereumBlockchainResponse(BaseModel):