/// <summary>
/// Signs the provided claim for using the key provided in the specified claim request.
/// </summary>
/// <remarks>
/// <para>
/// The <paramref name="claimReqJson"/> parameter must be passed a claim request that was previously
/// created using the <see cref="ProverCreateAndStoreClaimReqAsync(Wallet, string, string, string, string)"/>
/// method. Usually the claim request will be received from another party that has performed this
/// action.
/// </para>
/// <para>
/// The claim to be signed is provided in the <paramref name="claimJson"/> parameter
/// and the structure of the claim must conform to the schema from claim request provided in
/// the <paramref name="claimReqJson"/> parameter. Claims must be structured as a series of
/// attributes, each of which has two values; a human readable value and a hex encoded value.
/// <code>
/// {
/// "attr1" : ["value1", "value1_as_int"],
/// "attr2" : ["value2", "value2_as_int"]
/// }
/// </code>
/// For example:
/// <code>
/// {
/// 'name': ['Alex', '1139481716457488690172217916278103335'],
/// 'height': ['175', '175']
/// }
/// </code>
/// </para>
/// <para>
/// This method results a revocation registry update JSON and a newly issued claim JSON. The
/// claim JSON contains the issued claim, the DID of the issuer (<c>issuer_did</c>),
/// schema sequence number (<c>schema_seq_no</c>) and revocation registry sequence number (<c>
/// revoc_reg_seq_no</c>) used for issuance:
/// <code>
/// {
/// "claim": <see claim_json above>,
/// "signature": <signature>,
/// "revoc_reg_seq_no", string,
/// "issuer_did", string,
/// "schema_seq_no", string,
/// }
/// </code>
/// </para>
/// </remarks>
/// <param name="wallet">The wallet containing the keys to use for signing the claim.</param>
/// <param name="claimReqJson">A claim request with a blinded secret.</param>
/// <param name="claimJson">A claim containing attribute values for each of requested attribute names.</param>
/// <param name="userRevocIndex">The index of a new user in the revocation registry or -1 if absentee.</param>
/// <returns>An asynchronous <see cref="Task{T}"/> that, when the operation completes, resolves to
/// an <see cref="IssuerCreateClaimResult"/>.</returns>
public static Task <IssuerCreateClaimResult> IssuerCreateClaimAsync(Wallet wallet, string claimReqJson, string claimJson, int userRevocIndex)
{
var taskCompletionSource = new TaskCompletionSource <IssuerCreateClaimResult>();
var commandHandle = PendingCommands.Add(taskCompletionSource);
var commandResult = IndyNativeMethods.indy_issuer_create_claim(
commandHandle,
wallet.Handle,
claimReqJson,
claimJson,
userRevocIndex,
_issuerCreateClaimCallback
);
CallbackHelper.CheckResult(commandResult);
return(taskCompletionSource.Task);
}
