- add DbChainManager

- use `DbChainManager` as default `IChainManager`

src/MetaDataAPI/DefaultServiceProvider.cs

@@ -13,7 +13,7 @@ public static class DefaultServiceProvider
     {
         var serviceCollection = new ServiceCollection();
 
-        serviceCollection.AddSingleton<IChainManager, LocalChainManager>(_ => new LocalChainManager());
+        serviceCollection.AddSingleton<IChainManager, DbChainManager>(_ => new DbChainManager());
         serviceCollection.AddSingleton<IErc20Provider, Erc20Provider>(_ => new Erc20Provider());
         serviceCollection.AddSingleton<ITlyContext, TlyContext>(_ => new TlyContext(Environments.TLY_API_KEY.Get()));
         serviceCollection.AddSingleton<ILockDealNFTService, LockDealNFTService>(_ => new LockDealNFTService());

src/MetaDataAPI/LambdaFunction.cs

@@ -1,7 +1,6 @@
 using Nethereum.Web3;
 using Amazon.Lambda.Core;
 using MetaDataAPI.Request;
-using Newtonsoft.Json.Linq;
 using MetaDataAPI.Response;
 using MetaDataAPI.Providers;
 using MetaDataAPI.Extensions;

src/MetaDataAPI/MetaDataAPI.csproj

@@ -14,6 +14,7 @@
     <PackageReference Include="Amazon.Lambda.APIGatewayEvents" Version="2.7.0" />
     <PackageReference Include="Amazon.Lambda.Core" Version="2.2.0" />
     <PackageReference Include="Amazon.Lambda.Serialization.Json" Version="2.2.0" />
+    <PackageReference Include="CovalentDB" Version="2.0.12" />
     <PackageReference Include="FluentValidation" Version="11.9.2" />
 	<PackageReference Include="Handlebars.Net" Version="2.1.6" />
 	<PackageReference Include="Microsoft.Extensions.DependencyInjection" Version="8.0.0" />

src/MetaDataAPI/Services/ChainsInfo/DbChainManager.cs

@@ -0,0 +1,46 @@
+using CovalentDb;
+using System.Numerics;
+using CovalentDb.Types;
+using Net.Web3.EthereumWallet;
+
+namespace MetaDataAPI.Services.ChainsInfo;
+
+public class DbChainManager : IChainManager
+{
+    private readonly CovalentContext _context;
+
+    public DbChainManager() : this(new CovalentContext()) { }
+
+    public DbChainManager(CovalentContext context)
+    {
+        _context = context;
+    }
+
+    public bool TryFetchChainInfo(BigInteger chainId, out ChainInfo chainInfo)
+    {
+        chainInfo = new ChainInfo(-1, string.Empty, EthereumAddress.ZeroAddress);
+
+        var address = GetContractAddress(chainId);
+        if (string.IsNullOrEmpty(address)) return false;
+
+        var rpcUrl = GetRpcConnection(chainId);
+        if (string.IsNullOrEmpty(rpcUrl)) return false;
+
+        chainInfo = new ChainInfo(chainId, rpcUrl, address);
+        return true;
+    }
+
+    private string? GetContractAddress(BigInteger chainId)
+    {
+        return _context.DownloaderSettings
+            .FirstOrDefault(x => x.ChainId == chainId && x.ResponseType == ResponseType.LDNFTContractApproved)
+            ?.ContractAddress;
+    }
+
+    private string? GetRpcConnection(BigInteger chainId)
+    {
+        return _context.Chains
+            .FirstOrDefault(x => x.ChainId == chainId)
+            ?.RpcConnection;
+    }
+}