/// <summary>
/// Initializes an instance of the <see cref="ScriptPubKey"/> class.
/// </summary>
/// <param name="script">The script.</param>
/// <param name="network">The network where the transaction was conducted.</param>
public ScriptPubKey(NBitcoin.Script script, Network network) : base(script)
{
this.Type = this.GetScriptType(script.FindTemplate(network));
// To avoid modifying the very low-level GetDestination logic, check for a cold staking script first.
// The decision to show the cold pubkey's address in the 'addresses' list is based on the following:
// 1. It seems more intuitive from a user's perspective that their balance will appear against this address.
// 2. A balance should never appear against a hot address from an exchange's perspective, as they have no guarantee they will be able to spend those funds.
// It is also presumed that it is preferable to show an address rather than not, as a block explorer would then have to show only a relatively meaningless raw script as the output's destination.
// Another considered alternative was to show both addresses, but with a modified version byte. The underlying pubkey hashes would be the same, but the resulting addresses would be visually distinct from regular P2PKH.
// This may have caused user confusion, however, as the modified addresses would not look like those they used to configure the cold staking setup, making searching for them on a block explorer more difficult.
if (script.IsScriptType(ScriptType.ColdStaking))
{
var coldPubKeyHash = new KeyId(script.ToBytes(true).SafeSubarray(28, 20));
this.ReqSigs = 1;
this.Addresses = new List <string> {
coldPubKeyHash.GetAddress(network).ToString()
};
return;
}
var destinations = new List <TxDestination> {
script.GetDestination(network)
};
if (destinations[0] == null)
{
destinations = script.GetDestinationPublicKeys(network).Select(p => p.Hash).ToList <TxDestination>();
}
// TODO: We do not want to put the cold staking addresses into the 'addresses' element due to the high potential for confusion. Maybe introduce an additional element?
if (destinations.Count == 1)
{
this.ReqSigs = 1;
this.Addresses = new List <string> {
destinations[0].GetAddress(network).ToString()
};
}
else if (destinations.Count > 1)
{
PayToMultiSigTemplateParameters multi = PayToMultiSigTemplate.Instance.ExtractScriptPubKeyParameters(script) ??
PayToFederationTemplate.Instance.ExtractScriptPubKeyParameters(script, network);
if (multi != null)
{
this.ReqSigs = multi.SignatureCount;
this.Addresses = multi.PubKeys.Select(m => m.GetAddress(network).ToString()).ToList();
}
}
}
