✨ Add IDexAggregator interface & Jupiter implementation (#42)

* ✨ Add IDexAggregator & Jupiter implementation

* ⚡ Allow to set Mint on TokenData

* ♻️ Refactor & Fix getting quote on WebGL

src/Solana.Unity.Dex/IDexAggregator.cs

@@ -0,0 +1,89 @@
+using Solana.Unity.Dex.Models;
+using Solana.Unity.Dex.Quotes;
+using Solana.Unity.Rpc.Models;
+using System.Numerics;
+using Solana.Unity.Wallet;
+using System.Collections.Generic;
+using System.Threading.Tasks;
+
+namespace Solana.Unity.Dex
+{
+    /// <summary> 
+    /// A repository of functions that create and return full unsigned transactions to execute specified 
+    /// actions on the Whirlpool, e.g. creating a funded position or executing a swap. 
+    /// </summary> 
+    /// <remarks> 
+    /// The transactions are returned as Transaction instances, not signed. To complete the action each 
+    /// transaction must be signed, serialized, and sent to the RPC node. Each transaction may consist of 
+    /// a single instruction or multiple instructions. 
+    /// </remarks>
+    public interface IDexAggregator
+    {
+
+        /// <summary> 
+        /// Creates a quote for a swap for a specified pair of input/output token mint. 
+        /// </summary> 
+        /// <param name="inputMint">The mint address of the input token (the token to swap).</param> 
+        /// <param name="outputMint">The mint address of the output token (the token to swap for).</param> 
+        /// <param name="amount">The amount to swap (could be of the input token or output token).</param> 
+        /// <param name="slippageBps">The slippage % in BPS. If the output token amount exceeds the slippage then the swap transaction will fail.</param> 
+        /// <param name="excludeDexes">Default is that all DEXes are included. You can pass in the DEXes that you want to exclude and separate them by ,. For example, Aldrin,Saber.</param> 
+        /// <param name="onlyDirectRoutes">Default is false. Direct Routes limits Jupiter routing to single hop routes only.</param> 
+        /// <param name="platformFeeBps">If you want to charge the user a fee, you can specify the fee in BPS. Fee % is taken out of the output token.</param> 
+        /// <param name="maxAccounts">Rough estimate of the max accounts to be used for the quote, so that you can compose with your own accounts</param> 
+        /// <returns>A SwapQuote instance containing information about the swap amounts.</returns>
+        Task<SwapQuoteAg> GetSwapQuote(
+            PublicKey inputMint,
+            PublicKey outputMint,
+            BigInteger amount,
+            ushort? slippageBps = null,
+            List<string> excludeDexes = null,
+            bool onlyDirectRoutes = false,
+            ushort? platformFeeBps = null,
+            ushort? maxAccounts = null
+        );
+
+        /// <summary>
+        /// Creates a transaction to execute a swap for a specified pair of input/output token mint.
+        /// </summary>
+        /// <param name="quoteResponse"></param>
+        /// <param name="userPublicKey"></param>
+        /// <param name="destinationTokenAccount"></param>
+        /// <param name="wrapAndUnwrapSol"></param>
+        /// <param name="useSharedAccounts"></param>
+        /// <param name="feeAccount"></param>
+        /// <param name="computeUnitPriceMicroLamports"></param>
+        /// <param name="useTokenLedger"></param>
+        /// <returns></returns>
+        Task<Transaction> Swap(
+            SwapQuoteAg quoteResponse,
+            PublicKey userPublicKey = null,
+            PublicKey destinationTokenAccount = null,
+            bool wrapAndUnwrapSol = true,
+            bool useSharedAccounts = true,
+            PublicKey feeAccount = null,
+            BigInteger? computeUnitPriceMicroLamports = null,
+            bool useTokenLedger = false
+        );
+
+        /// <summary>
+        /// Get the list of tokens that are supported by the dex
+        /// </summary>
+        /// <returns></returns>
+        Task<IList<TokenData>> GetTokens(TokenListType tokenListType = TokenListType.Strict);
+
+        /// <summary>
+        /// Get a token details given the symbol
+        /// </summary>
+        /// <param name="symbol">the token symbol</param>
+        /// <returns></returns>
+        Task<TokenData> GetTokenBySymbol(string symbol);
+
+        /// <summary>
+        /// Get a token details given the mint address
+        /// </summary>
+        /// <param name="mint"></param>
+        /// <returns></returns>
+        Task<TokenData> GetTokenByMint(string mint);
+    }
+}

src/Solana.Unity.Dex/Jupiter/Core/Types/Http/SwapRequest.cs

@@ -0,0 +1,56 @@
+using Solana.Unity.Dex.Quotes;
+using Solana.Unity.Wallet;
+using BigInteger = System.Numerics.BigInteger;
+
+namespace Solana.Unity.Dex.Jupiter.Core.Types.Http;
+
+/// <summary>
+/// The request to get a swap quote from the Jupiter aggregator.
+/// </summary>
+public class SwapRequest
+{
+    /// <summary>
+    /// The swap quote
+    /// </summary>
+    public SwapQuoteAg QuoteResponse { get; set; }
+
+    /// <summary>
+    /// The user's public key
+    /// </summary>
+    public string UserPublicKey { get; set; }
+
+    /// <summary>
+    /// The user's token account
+    /// </summary>
+    public PublicKey DestinationTokenAccount { get; set; }
+
+    /// <summary>
+    ///  The user's token account
+    /// </summary>
+    public bool WrapAndUnwrapSol { get; set; }
+
+    /// <summary>
+    /// The user's token account
+    /// </summary>
+    public bool UseSharedAccounts { get; set; }
+
+    /// <summary>
+    /// The user's token account
+    /// </summary>
+    public PublicKey FeeAccount { get; set; }
+
+    /// <summary>
+    /// The user's token account
+    /// </summary>
+    public BigInteger? ComputeUnitPriceMicroLamports { get; set; }
+
+    /// <summary>
+    /// The user's token account
+    /// </summary>
+    public bool UseTokenLedger { get; set; }
+
+    /// <summary>
+    /// Is this a legacy transaction
+    /// </summary>
+    public bool AsLegacyTransaction { get; set; }
+}

src/Solana.Unity.Dex/Jupiter/Core/Types/Http/SwapResponse.cs

@@ -0,0 +1,24 @@
+using Newtonsoft.Json;
+using Org.BouncyCastle.Math;
+
+namespace Solana.Unity.Dex.Jupiter.Core.Types.Http;
+
+/// <summary>
+/// The response to get a swap quote from the Jupiter aggregator.
+/// </summary>
+public class SwapResponse
+{
+    /// <summary>
+    /// The swap quote
+    /// </summary>
+    public string SwapTransaction { get; set; }
+
+    [JsonProperty("lastValidBlockHeight")]
+    private string _lastValidBlockHeight { get; set; }
+
+    /// <summary>
+    /// The LastValidBlockHeight
+    /// </summary>
+    [JsonIgnore]
+    public BigInteger LastValidBlockHeight => new(_lastValidBlockHeight);
+}