/// <summary>
/// Tests if a person is a member of a particular community.
/// </summary>
/// <param name="community"></param>
/// <param name="member"></param>
/// <returns></returns>
public static bool IsCommunityMember(Community community, CommunityMember member)
{
if (community == null || community.Members == null)
{
return(false);
}
return(community.Members.Contains(member.Key));
}
/// <summary>
/// Removal of a person from the community will remove the member that invited the
/// affected person (called parent node) as well as the subgraph that has the parent node as
/// its root. This is to maximise removal of tainted members, since bad members are more
/// likely to invite those like themselves.
/// </summary>
/// <param name="community"></param>
/// <param name="member"></param>
public static bool Expel(Community community, CommunityMember member)
{
if (community == null || community.Children.Count == 0 || member == null)
{
return(false);
}
//ensure that only members of the community in the method parameter are tested.
if (!IsCommunityMember(community, member))
{
return(false);
}
throw new NotImplementedException("Expel has not been implemented");
}
/// <summary>
/// Simple method to add a person to a community.
/// A new issuance coin is used for every invite.
/// This is so that the colored coin can be traced back to the inviters scriptPubKey.
/// The payment of the community application coin to the registration address adds the new
/// community to the community registration address list. This enables the referencing of a
/// community through its public key.
/// </summary>
/// <param name="rpcClient"></param>
/// <param name="community"></param>
/// <param name="member"></param>
/// <param name="invitee"></param>
/// <param name="definitionUrl"></param>
/// <returns></returns>
public static bool Invite(RPCClient rpcClient, Community community, CommunityMember member, CommunityMember invitee, string definitionUrl, Network network)
{
decimal amount = 0.0001m;
Script scriptPubKey = new Script();
uint256 transactionId = new uint256();
bool canProceed = false;
//check is member belongs in community to which they are inviting invitee
if (IsCommunityMember(community, member))
{
//check that the inviter has at least one transaction balance that is big enough for the current transaction.
UnspentCoin[] transactions = rpcClient.ListUnspent();
for (int i = 0; i < transactions.Length; i++)
{
if (transactions[i].Amount.ToUnit(MoneyUnit.Satoshi) >= amount)
{
scriptPubKey = transactions[i].ScriptPubKey;
transactionId = transactions[i].OutPoint.Hash;
canProceed = true;
break;
}
}
if (!canProceed)
{
return(false);
}
IssuanceCoin issuanceCoin = MarketService.IssueCoin(transactionId, scriptPubKey, definitionUrl);
//build and verify the transaction
BitcoinColoredAddress inviteePubKey = BitcoinAddress.Create(invitee.Key).ToColoredAddress();
BitcoinSecret bitcoinSecret = new BitcoinSecret(community.Key);
Transaction transaction = MarketService.BuildCommunityTransaction(issuanceCoin, inviteePubKey, bitcoinSecret, amount, 1);
if (transaction != null)
{
MarketService.Broadcast(transaction, network);
return(true);
}
}
return(false);
}
