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C# / .NET SDK

Installation​

dotnet add package CrowdProof.SDK

Requires .NET 8+.

Initialization​

using CrowdProof.SDK;

var client = new CrowdProofClient("cp_live_abc123...");

Dependency Injection​

builder.Services.AddCrowdProof(options =>
{
    options.ApiKey = builder.Configuration["CrowdProof:ApiKey"];
});

Then inject ICrowdProofClient into your services.

Reputation Scores​

// Single score
var score = await client.GetScoreAsync("0x1234...", "DEFI_LENDING");
Console.WriteLine($"Score: {score.Score}, Tier: {score.Tier}");

// All categories
var all = await client.GetAllScoresAsync("0x1234...");
foreach (var s in all.Scores)
    Console.WriteLine($"{s.Category}: {s.Score}");

// Batch query
var batch = await client.BatchQueryAsync(
    new[] { "0x1234...", "0x5678..." },
    "DEFI_LENDING"
);

ZK Proofs​

// Generate
var proof = await client.GenerateProofAsync(new ProofRequest
{
    Subject = "0x1234...",
    ProofType = "ScoreAboveThreshold",
    Category = "DEFI_LENDING",
    Threshold = 700
});

// Verify
var result = await client.VerifyProofAsync(proof.Proof);
Console.WriteLine($"Valid: {result.Valid}");

Identity (DID)​

// Register
var did = await client.RegisterDIDAsync("0x1234...", chainId: 1);

// Resolve
var resolved = await client.GetDIDAsync("did:ethr:0x1234...");

Error Handling​

try
{
    var score = await client.GetScoreAsync("invalid", "DEFI_LENDING");
}
catch (CrowdProofException ex)
{
    Console.WriteLine($"Error {ex.StatusCode}: {ex.Message}");
    if (ex.StatusCode == 429)
        await Task.Delay(TimeSpan.FromSeconds(ex.RetryAfter));
}