public void voteValidatorAsWitness()
{
var lib = new RecentCore(NodeUrl);
var wallet = lib.importWalletFromSeedPhrase("combine close before lawsuit asthma glimpse yard debate mixture stool adjust ride");
var epoch = lib.getCurrentValidatorsEpoch().Result + 1;
var candidates = lib.getCandidatesDetailsByEpoch(epoch).Result;
var candidate = candidates.FirstOrDefault();
var balance = lib.getBalance().Result;
var requiredBalance = lib.witnessRequiredBalancePercent().Result;
if (candidate != null)
{
var tx = lib.voteValidatorAsWitness(candidate.address, balance * requiredBalance / 100m, false, true, null).Result;
}
}