为什么将返回的 Json 反序列化为类对象在 C# 中失败？

Question

我正在开发一个电报机器人，它可以向频道中的用户报告交易信息。交易信息是通过使用标准“application/json”响应的 HTTP 请求拉取的。

该应用程序执行两次传递：第一个传递返回其检查的代币的当前市场价格。第二个提供了上次检查时间戳之后发生的所有新事务。这是当前代码，减去 API 密钥。出于隐私考虑，API 密钥已被删除。

using Newtonsoft.Json;
using Telegram.Bot;
using Telegram.Bot.Exceptions;
using Telegram.Bot.Types;
using Telegram.Bot.Types.Enums;
using System.Net.Http;
using System.Net.Http.Headers;
using System.Threading.Tasks;
using Newtonsoft.Json.Linq;
using System.Text.RegularExpressions;

namespace TelegramBotGeneric
{

    class PriceObject
    {
    public string address { get; set; } = string.Empty;
    public double volume_24h { get; set; }
    public double liquidity { get; set; }
    public double volume_24h_usd { get; set; }
    public double liquidty_usd { get; set; }
    public double price_usd { get; set; }
    public double volume_24h_delta { get; set; }
    public double liquidity_24H_delta { get; set; }
    public double volume_24h_delta_usd { get; set; }
    public double liquidty_24h_delta_usd { get; set; }
    public double  price_25h_delta_usd{ get; set; }
    public double timestamp { get; set; }
    public PriceObject()
    {
        //default CTOR
    }
}

class tokensTransfered
{
    public string address { get; set; } = string.Empty;
    public string symbol { get; set; } = string.Empty;
    public string amm { get; set; } = string.Empty;
    public string network { get; set; } = string.Empty;
    public double price_usd { get; set; }
    public double price_eth { get; set; }
    public double amount { get; set; }
    public double amount_in { get; set; }
    public double amount_out { get; set; }

    public tokensTransfered()
    {
        //defaut CTOR
    }
}

class returnedTransaction
{
    public string amm { get; set; } = string.Empty;
    public long chain_id { get; set; }
    public string direction { get; set; } = string.Empty;
    public string transaction_address { get; set; } = string.Empty;
    public double timestamp { get; set; }
    public double block_number { get; set; }
    public string to { get; set; } = string.Empty;
    public string sender { get; set; } = string.Empty;
    public double amount_usd { get; set; }
    public List<tokensTransfered> tokens_in { get; set; } = new List<tokensTransfered>();
    public List<tokensTransfered> tokens_out { get; set; } = new List<tokensTransfered>();
    public string pair_address { get; set; } = string.Empty;
    public string wallet_address { get; set; } = string.Empty;
    public string wallet_category { get; set; } = string.Empty;
    public string transaction_type { get; set; } = String.Empty;

    public returnedTransaction()
    {
        //default CTOR
    }
}
public class TelegramBot
{
    //Readonly Declarators for API Information and Query Strings
    private static readonly string TB_BASE_IMAGES_DIRECTORY = @Directory.GetCurrentDirectory() + "\\images";
    private static readonly string TB_API_ADDR = "https://api.dev.dex.guru/v1/chain/137/tokens/";
    private static readonly string DEXGURU_MARKET_API_KEY = 
        "/market?api-key=";
    private static readonly string DEXGURU_TRANSACTIONS_API_KEY = 
        "/transactions?api-key=";
    private static readonly string TELEGRAM_BOT_API_KEY = "";
    private static readonly int TB_MAX_TIME_BETWEEN_POLLING = 10;
    private static readonly int TB_MAX_TIME_BETWEEN_REFRESH_ON_ERROR = 15;

    //declarators for TelegramBot API
    private static TelegramBotClient client = new TelegramBotClient(TELEGRAM_BOT_API_KEY);
    private static CancellationTokenSource cts = new CancellationTokenSource();
    //private static IEnumerable<BotCommand> botCommands;

    //storage containers for Image URL and Contract addresses
    public static Dictionary<string, string> tbBotCheckableContractAddresses { get; set; } = new Dictionary<string, string>();
    public static string[] tbBotImgFileURL { get; set; } = new string[] { };

    //variables for time calculation
    private static DateTime lastUpdateTime = new();
    private static int tbCurrentTimeBetweenPolling = 0;
    private static bool tbFirstPassthrough = true;
    private static bool tbContinuePolling = true;
    private static double tbTransactionLastCheckedTimestamp = 0;


    //variables for HTTPRequest Information
    private static HttpClient tbHttpClient = new HttpClient();
    private static Dictionary<string, double> tbApiReturnedPrices { get; set; } = new Dictionary<string, double>();
    private static Dictionary<string, double> tbApiPreviousPrices { get; set; } = new Dictionary<string, double>();
    private static string tbCurrentlyPolledAddress = "";


    public static async Task Main(string[] args)
    {
        lastUpdateTime = DateTime.Now;
        tbAddAddressesToCheckist();
        tbAddDefaultPrices();
        tbCurrentTimeBetweenPolling = TB_MAX_TIME_BETWEEN_POLLING;
        do
        { 
            if(tbFirstPassthrough)
            {
                //first we want to check prices
                await tbCompletePriceUpdate();

                //TEST - output to Telegram the price of TDL
                /*Message statusMessage = await client.SendTextMessageAsync(chatId: -765409926,
                 text: "The Current Price of Tidal" + Environment.NewLine +
                 "**TDL/USD**:  $" + Regex.Escape(tbApiReturnedPrices["TDL"].ToString() + " per TDL.")
                 + Environment.NewLine + "**TDL/WETH**: "
                 + Regex.Escape((tbApiReturnedPrices["WETH"] * ((tbApiReturnedPrices["TDL"] / tbApiReturnedPrices["WETH"])* 100)).ToString() + " WETH per TDL. (WETH = " + tbApiReturnedPrices["WETH"] + ")")
                 + Environment.NewLine + "**TDL/WBTC**: "
                 + Regex.Escape((tbApiReturnedPrices["WBTC"] * ((tbApiReturnedPrices["TDL"] / tbApiReturnedPrices["WBTC"])* 100)).ToString() + " WBTC per TDL. (WBTC = " + tbApiReturnedPrices["WBTC"] + ")"),
                 parseMode: ParseMode.MarkdownV2,
                 disableNotification: true, cancellationToken: cts.Token);
                lastUpdateTime = DateTime.Now;*/

                await tbFetchNewProcessedOrders(tbBotCheckableContractAddresses["WETH"]);


            }
            else if((DateTime.Now - lastUpdateTime).Minutes >= TB_MAX_TIME_BETWEEN_POLLING)
            {
                //first we want to check prices
                await tbCompletePriceUpdate();

                //TEST - output to Telegram the price of TDL
                /*Message statusMessage = await client.SendTextMessageAsync(chatId: -765409926,
                 text: "The Current Price of Tidal" + Environment.NewLine +
                 "**TDL/USD**:  $" + Regex.Escape(tbApiReturnedPrices["TDL"].ToString() + " per TDL.")
                 + Environment.NewLine + "**TDL/WETH**: "
                 + Regex.Escape((tbApiReturnedPrices["WETH"] * ((tbApiReturnedPrices["TDL"] / tbApiReturnedPrices["WETH"])* 100)).ToString() + " WETH per TDL. (WETH = " + tbApiReturnedPrices["WETH"] + ")")
                 + Environment.NewLine + "**TDL/WBTC**: "
                 + Regex.Escape((tbApiReturnedPrices["WBTC"] * ((tbApiReturnedPrices["TDL"] / tbApiReturnedPrices["WBTC"])* 100)).ToString() + " WBTC per TDL. (WBTC = " + tbApiReturnedPrices["WBTC"] + ")"),
                 parseMode: ParseMode.MarkdownV2,
                 disableNotification: true, cancellationToken: cts.Token);
                lastUpdateTime = DateTime.Now;*/
                await tbFetchNewProcessedOrders(tbBotCheckableContractAddresses["WETH"]);
            }
            else
            {
                //something here
                await tbFetchNewProcessedOrders(tbBotCheckableContractAddresses["WETH"]);
            }
        } while (tbContinuePolling);
    }

    private static void tbAddAddressesToCheckist()
    {
        tbBotCheckableContractAddresses.Add("TDL", "0x896219cfa4dF4AB30A418355928724d8B5D25FAC");
        //tbBotCheckableContractAddresses.Add("WMATIC", "0x0d500B1d8E8eF31E21C99d1Db9A6444d3ADf1270");
        //tbBotCheckableContractAddresses.Add("WBNB", "0x3BA4c387f786bFEE076A58914F5Bd38d668B42c3");
        tbBotCheckableContractAddresses.Add("WETH", "0x7ceB23fD6bC0adD59E62ac25578270cFf1b9f619");
        tbBotCheckableContractAddresses.Add("WBTC", "0x1BFD67037B42Cf73acF2047067bd4F2C47D9BfD6");
    }

    public static void tbAddDefaultPrices()
    {
        tbApiReturnedPrices.Add("TDL", 0);
        //tbApiReturnedPrices.Add("WMATIC", 0);
        //tbApiReturnedPrices.Add("WBNB", 0);
        tbApiReturnedPrices.Add("WETH", 0);
        tbApiReturnedPrices.Add("WBTC", 0);
        tbApiPreviousPrices = tbApiReturnedPrices;
    }

    private static void tbHttpClientSetup(string address)
    {
        tbHttpClient = new HttpClient();
        tbHttpClient.DefaultRequestHeaders.Accept.Clear();
        tbHttpClient.DefaultRequestHeaders.Accept.Add(new MediaTypeWithQualityHeaderValue("application/json"));
        tbCurrentlyPolledAddress = address;
    }

    private static async Task tbHttpClientGetPriceData()
    {
        HttpResponseMessage response = await tbHttpClient.GetAsync(new Uri(TB_API_ADDR + tbCurrentlyPolledAddress + DEXGURU_MARKET_API_KEY));
        response.EnsureSuccessStatusCode();
        if(response.IsSuccessStatusCode)
        {
            try
            {
                PriceObject jsonResponse = JsonConvert.DeserializeObject<PriceObject>(await response.Content.ReadAsStringAsync());
                if (jsonResponse == null)
                    throw new ArgumentException();
                tbApiReturnedPrices[(tbBotCheckableContractAddresses.FirstOrDefault(x => x.Value == tbCurrentlyPolledAddress).Key)] = jsonResponse.price_usd;
                Console.WriteLine("Retrieved Price Update For Contract " + tbCurrentlyPolledAddress);

            }
                
            catch (Exception ex) when(ex is ArgumentException || ex is NullReferenceException)
            {
                Console.WriteLine("Error getting transaction updates For Contract " + tbCurrentlyPolledAddress + ". Error: "
                    + ex.Message);
                Message statusMessage = await client.SendTextMessageAsync(chatId: -765409926,
                text: Regex.Escape("Error: An error occured when getting transaction data from source. Trying again in "
                + TB_MAX_TIME_BETWEEN_REFRESH_ON_ERROR + "Minutes. Status: " + ex.HResult), parseMode: ParseMode.MarkdownV2,
                disableNotification: true, cancellationToken: cts.Token);
            }

        }
        else
        {
            Console.WriteLine("Error getting transaction updates For Contract " + tbCurrentlyPolledAddress + ". Status: "
                    + response.StatusCode);
            Message statusMessage = await client.SendTextMessageAsync(chatId: -765409926,
            text: Regex.Escape("Error: An error occured when getting transaction data from source. Trying again in "
            + TB_MAX_TIME_BETWEEN_REFRESH_ON_ERROR + "Minutes. Status: " + response.StatusCode), parseMode: ParseMode.MarkdownV2,
            disableNotification: true, cancellationToken: cts.Token);
        }
    }

    private static async Task tbCompletePriceUpdate()
    {
        foreach(KeyValuePair<string, string> pair in tbBotCheckableContractAddresses)
        {
            tbHttpClientSetup(pair.Value);
            await tbHttpClientGetPriceData();

            tbApiPreviousPrices = tbApiReturnedPrices;
        }
    }

    private static async Task tbFetchNewProcessedOrders(string address)
    {
        //setup the HTTP Client
        tbHttpClientSetup(address);
        string polledAddress = tbBotCheckableContractAddresses.FirstOrDefault(x => x.Value == address).Key;
        returnedTransaction[] transactions;

        //get the response
        HttpResponseMessage response = await tbHttpClient.GetAsync(new Uri(TB_API_ADDR + tbCurrentlyPolledAddress + DEXGURU_TRANSACTIONS_API_KEY));
        response.EnsureSuccessStatusCode();
        if (response != null)
        {
            try
            {
                //Console.WriteLine(await response.Content.ReadAsStringAsync());
                transactions = JsonConvert.DeserializeObject<returnedTransaction[]>(await response.Content.ReadAsStringAsync());
                if (transactions == null)
                    throw new ArgumentException();

                foreach(returnedTransaction transaction in transactions)
                {
                    
                    if(tbTransactionLastCheckedTimestamp == 0)
                    {
                        tbTransactionLastCheckedTimestamp = transaction.timestamp;

                        Console.WriteLine(
                            (transaction.amount_usd / tbApiReturnedPrices[polledAddress]) + " " + polledAddress +
                            " was purchased for $" + transaction.amount_usd + ".");
                        Thread.Sleep(2000);
                    }
                    else
                    {
                        if (tbTransactionLastCheckedTimestamp < transaction.timestamp)
                            tbTransactionLastCheckedTimestamp = transaction.timestamp;

                        Console.WriteLine(
                            ((double)transaction.amount_usd / tbApiReturnedPrices[polledAddress]) + " " + polledAddress +
                            " was purchased for $" + transaction.amount_usd + ".");
                        Thread.Sleep(2000);
                    }
                }

            } catch (Exception ex) when (ex is ArgumentException || ex is NullReferenceException)
            {
                Console.WriteLine("Error getting transaction updates For Contract " + tbCurrentlyPolledAddress + ". Error: "
                    + ex.Message);
                Message statusMessage = await client.SendTextMessageAsync(chatId: -765409926,
                text: Regex.Escape("Error: An error occured when getting transaction data from source. Trying again in "
                + TB_MAX_TIME_BETWEEN_REFRESH_ON_ERROR + "Minutes. Status: " + ex.HResult), parseMode: ParseMode.MarkdownV2,
                disableNotification: true, cancellationToken: cts.Token);
            }

        }
        else
        {
            Console.WriteLine("Error getting transaction updates For Contract " + tbCurrentlyPolledAddress + ". Status: "
                    + response.StatusCode);
            Message statusMessage = await client.SendTextMessageAsync(chatId: -765409926,
            text: Regex.Escape("Error: An error occured when getting transaction data from source. Trying again in "
            + TB_MAX_TIME_BETWEEN_REFRESH_ON_ERROR + "Minutes. Status: " + response.StatusCode), parseMode: ParseMode.MarkdownV2,
            disableNotification: true, cancellationToken: cts.Token);
        }
    }

    private static async Task HandleUpdateAsync(ITelegramBotClient botClient, Update update, CancellationToken cancellationToken)
    {
        // Only process Message updates: https://core.telegram.org/bots/api#message
        if (update.Type != UpdateType.Message)
            return;
        // Only process text messages
        if (update.Message!.Type != MessageType.Text)
            return;

        var chatId = update.Message.Chat.Id;
        var messageText = update.Message.Text;

        Console.WriteLine($"Received a '{messageText}' message in chat {chatId}.");

        // Echo received message text
        Message sentMessage = await botClient.SendTextMessageAsync(
            chatId: chatId,
            text: "You said:\n" + messageText,
            cancellationToken: cancellationToken);
    }

    private Task HandleErrorAsync(ITelegramBotClient botClient, Exception exception, CancellationToken cancellationToken)
    {
        var ErrorMessage = exception switch
        {
            ApiRequestException apiRequestException
                => $"Telegram API Error:\n[{apiRequestException.ErrorCode}]\n{apiRequestException.Message}",
            _ => exception.ToString()
        };

        Console.WriteLine(ErrorMessage);
        return Task.CompletedTask;
    }
}
}

这里的问题在于上面代码中的函数：

private static async Task tbFetchNewProcessedOrders(string address)

该函数能够从 API 调用中正确返回 json 数据，它还返回 状态代码：200 [OK]

但是，当我尝试将数据反序列化为类对象数组，它会抛出错误：

Newtonsoft.Json.JsonSerializationException：'无法将当前JSON对象（例如{“name”：“value”}）反序列化为类型'TelegramBotGeneric.returnedTransaction[]' 因为该类型需要一个 JSON 数组

虽然 HTTP 请求确实返回一个 json 数组，并且该函数

private static async Task tbHttpClientGetPriceData()

也以相同的方式反序列化，但它不需要数组类，因为它每个请求仅返回 1 个代币价格，并且反序列化时不会失败。

对于发生的事情有什么想法吗？我错过了什么吗？任何和所有的帮助将不胜感激。

编辑：Json 结果的副本：

{"total":10000,"data":[{"amm":"waultswap","chain_id":137,"direction":"in","transaction_address":"0xfd8baf557efb178b15fa248ae220d133f0f9fc6d80ca45006eb7f2302fee729c","timestamp":1645650607,"block_number":25270535,"to":"0xcecc7e26d0987281b7da1e3c757161ed6b20af6f","sender":"0x79bafc10542ba08593b2d775d64ed197b0b9a5f9","amount_usd":9.704910550601628,"tokens_in":[{"address":"0x2791bca1f2de4661ed88a30c99a7a9449aa84174","symbol":"USDC","amm":"waultswap","network":"polygon","price_usd":0.9997410796727977,"price_eth":0.6633868277838665,"amount":9.707424,"amount_in":9.707424,"amount_out":0.0}],"tokens_out":[{"address":"0x7ceb23fd6bc0add59e62ac25578270cff1b9f619","symbol":"WETH","amm":"waultswap","network":"polygon","price_usd":2623.3377574906485,"price_eth":1740.2877131473633,"amount":0.003696525837357276,"amount_in":0.0,"amount_out":0.003696525837357276}],"pair_address":"0xd928ce1d0f2642e44615768761c0f00c23e0d588","wallet_address":"0x779010626fd0c88b6013e802478f07d84de5c4d7","wallet_category":"bot","transaction_type":"swap"},{"amm":"quickswap","chain_id":137,"direction":"out","transaction_address":"0xfd8baf557efb178b15fa248ae220d133f0f9fc6d80ca45006eb7f2302fee729c","timestamp":1645650607,"block_number":25270535,"to":"0xd8d51ea2edca2c2ea15a053a5730f559d79a1570","sender":"0x79bafc10542ba08593b2d775d64ed197b0b9a5f9","amount_usd":9.719504105372957,"tokens_in":[{"address":"0x7ceb23fd6bc0add59e62ac25578270cff1b9f619","symbol":"WETH","amm":"quickswap","network":"polygon","price_usd":2629.3618746410916,"price_eth":1744.2848570041135,"amount":0.003696525837357276,"amount_in":0.003696525837357276,"amount_out":0.0}],"tokens_out":[{"address":"0x7f426f6dc648e50464a0392e60e1bb465a67e9cf","symbol":"PAUTO","amm":"quickswap","network":"polygon","price_usd":387.73659420086454,"price_eth":257.2194707368818,"amount":0.02503545234060058,"amount_in":0.0,"amount_out":0.02503545234060058}],"pair_address":"0xcecc7e26d0987281b7da1e3c757161ed6b20af6f","wallet_address":"0x779010626fd0c88b6013e802478f07d84de5c4d7","wallet_category":"bot","transaction_type":"swap"},{"amm":"uniswap_v3","chain_id":137,"direction":"out","transaction_address":"0x5d0bed394c1a35dcc12a70863b499807f1994cd2b3d4f53f3ebadebf4cf02018","timestamp":1645650603,"block_number":25270534,"to":"0x68b3465833fb72a70ecdf485e0e4c7bd8665fc45","sender":"0x68b3465833fb72a70ecdf485e0e4c7bd8665fc45","amount_usd":24187.585904394073,"tokens_in":[{"address":"0x7ceb23fd6bc0add59e62ac25578270cff1b9f619","symbol":"WETH","amm":"uniswap_v3","network":"polygon","price_usd":2622.4290334646125,"price_eth":1739.6856993161678,"amount":9.225,"amount_in":9.225,"amount_out":0.0}],"tokens_out":[{"address":"0x2791bca1f2de4661ed88a30c99a7a9449aa84174","symbol":"USDC","amm":"uniswap_v3","network":"polygon","price_usd":0.9997410796727977,"price_eth":0.6633871411260988,"amount":24193.850184,"amount_in":0.0,"amount_out":24193.850184}],"pair_address":"0x45dda9cb7c25131df268515131f647d726f50608","wallet_address":"0x0dd89655c6ee8d660c00667625434b53112bd32e","wallet_category":"heavy","transaction_type":"swap"},{"amm":"uniswap_v3","chain_id":137,"direction":"out","transaction_address":"0x5d0bed394c1a35dcc12a70863b499807f1994cd2b3d4f53f3ebadebf4cf02018","timestamp":1645650603,"block_number":25270534,"to":"0x68b3465833fb72a70ecdf485e0e4c7bd8665fc45","sender":"0x68b3465833fb72a70ecdf485e0e4c7bd8665fc45","amount_usd":4839.085854444992,"tokens_in":[{"address":"0x7ceb23fd6bc0add59e62ac25578270cff1b9f619","symbol":"WETH","amm":"uniswap_v3","network":"polygon","price_usd":2623.789185554057,"price_eth":1742.0049634816962,"amount":1.845,"amount_in":1.845,"amount_out":0.0}],"tokens_out":[{"address":"0x0d500b1d8e8ef31e21c99d1db9a6444d3adf1270","symbol":"WMATIC","amm":"uniswap_v3","network":"polygon","price_usd":1.5061892707297249,"price_eth":1.0,"amount":3212.8006409848686,"amount_in":0.0,"amount_out":3212.8006409848686}],"pair_address":"0x86f1d8390222a3691c28938ec7404a1661e618e0","wallet_address":"0x0dd89655c6ee8d660c00667625434b53112bd32e","wallet_category":"heavy","transaction_type":"swap"},{"amm":"uniswap_v3","chain_id":137,"direction":"out","transaction_address":"0x5d0bed394c1a35dcc12a70863b499807f1994cd2b3d4f53f3ebadebf4cf02018","timestamp":1645650603,"block_number":25270534,"to":"0x68b3465833fb72a70ecdf485e0e4c7bd8665fc45","sender":"0x68b3465833fb72a70ecdf485e0e4c7bd8665fc45","amount_usd":3235.066832050649,"tokens_in":[{"address":"0x7ceb23fd6bc0add59e62ac25578270cff1b9f619","symbol":"WETH","amm":"uniswap_v3","network":"polygon","price_usd":2629.3618746410916,"price_eth":1744.2848570041135,"amount":1.23,"amount_in":1.23,"amount_out":0.0}],"tokens_out":[{"address":"0x769434dca303597c8fc4997bf3dab233e961eda2","symbol":"XSGD","amm":"uniswap_v3","network":"polygon","price_usd":0.7445968945528842,"price_eth":0.4939560051688091,"amount":4344.722434,"amount_in":0.0,"amount_out":4344.722434}],"pair_address":"0x8eb315dbd94469016e84098184dd55c1af2edabb","wallet_address":"0x0dd89655c6ee8d660c00667625434b53112bd32e","wallet_category":"h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Answer 1

我解决了。没有反序列化上层类和数组。现在它正在工作。感谢您的帮助。