using System.Text.Json.Nodes;

namespace StellaOps.Findings.Ledger.Hashing;

public static class LedgerHashing
{
    public static LedgerHashResult ComputeHashes(JsonObject canonicalEnvelope, long sequenceNumber)
    {
        var canonicalJson = LedgerCanonicalJsonSerializer.Serialize(canonicalEnvelope);
        var eventHash = HashUtilities.ComputeSha256Hex(canonicalJson);
        var merkleLeafInput = $"{eventHash}-{sequenceNumber}";
        var merkleLeafHash = HashUtilities.ComputeSha256Hex(merkleLeafInput);
        return new LedgerHashResult(eventHash, merkleLeafHash, canonicalJson);
    }
}

public sealed record LedgerHashResult(
    string EventHash,
    string MerkleLeafHash,
    string CanonicalJson);