<PackageReference Include="BouncyCastle.Cryptography" Version="2.7.0" />

Org.BouncyCastle.Crypto.Signers.Ed25519Signer

public class Ed25519Signer : ISigner
Pure Ed25519 (RFC 8032) signature primitive. Buffers the message via the streaming ISigner surface and dispatches it to the curve routines on finalisation; no context is permitted.
namespace Org.BouncyCastle.Crypto.Signers { public class Ed25519Signer : ISigner { public virtual string AlgorithmName { get; } public Ed25519Signer(); public virtual void Init(bool forSigning, ICipherParameters parameters); public virtual void Update(byte b); public virtual void BlockUpdate(byte[] buf, int off, int len); public virtual int GetMaxSignatureSize(); public virtual byte[] GenerateSignature(); public virtual bool VerifySignature(byte[] signature); public virtual void Reset(); } }