protected void Sign <T>(ref T tblock)
{
if (!(tblock is TransactionBlock))
{
throw new System.ApplicationException("APIResultCodes.InvalidBlockType");
}
var block = tblock as TransactionBlock;
// ServiceHash is excluded when calculating the block hash,
// but it is included when creating/validating the authorization signature
block.ServiceHash = _serviceAccount.GetLatestBlock().Hash;
// sign with the authorizer key
AuthorizationSignature authSignature = new AuthorizationSignature
{
Key = _serviceAccount.AccountId,
Signature = Signatures.GetSignature(_serviceAccount.PrivateKey, block.Hash + block.ServiceHash)
};
if (block.Authorizations == null)
{
block.Authorizations = new List <AuthorizationSignature>();
}
block.Authorizations.Add(authSignature);
}