public static async Task Run([PerperStreamTrigger] PerperStreamContext context,
[Perper("ipfsGateway")] string ipfsGateway,
[PerperStream("dataStream")] IAsyncEnumerable <object> dataStream,
[PerperStream("outputStream")] IAsyncCollector <IHashed <object> > outputStream,
ILogger logger)
{
var ipfs = new IpfsClient(ipfsGateway);
await dataStream.ForEachAsync(async item =>
{
try
{
var jToken = IpfsJsonSettings.JTokenFromObject(item);
var cid = await ipfs.Dag.PutAsync(jToken, cancel: CancellationToken.None);
var hash = new Hash {
Bytes = cid.ToArray()
};
logger.LogDebug("Saved {json} as {hash} in ipfs", jToken.ToString(Formatting.None), hash);
await outputStream.AddAsync(Hashed.Create(item, hash));
}
catch (Exception e)
{
logger.LogError(e.ToString());
}
}, CancellationToken.None);
}
public static async Task Run([PerperStreamTrigger] PerperStreamContext context,
[Perper("ipfsGateway")] string ipfsGateway,
[Perper("topic")] string topic,
[PerperStream("outputStream")] IAsyncCollector <ISigned <object> > outputStream,
ILogger logger)
{
var ipfs = new IpfsClient(ipfsGateway);
await ipfs.PubSub.SubscribeAsync(topic, async message =>
{
try
{
var item = IpfsJsonSettings.BytesToObject <ISigned <object> >(message.DataBytes);
var valueBytes = IpfsJsonSettings.ObjectToBytes(item.Value);
if (item.Signer.ValidateSignature(valueBytes, item.Signature))
{
logger.LogTrace("Received a '{type}' from '{topic}' on IPFS pubsub", item.GetType(), topic);
await outputStream.AddAsync(item);
}
}
catch (Exception e)
{
logger.LogError(e.ToString());
}
}, CancellationToken.None);
await context.BindOutput(CancellationToken.None);
}
public static async Task Run([PerperStreamTrigger] PerperStreamContext context,
[Perper("ipfsGateway")] string ipfsGateway,
[PerperStream("hashStream")] IAsyncEnumerable <Hash> hashStream,
[PerperStream("outputStream")] IAsyncCollector <IHashed <object> > outputStream,
ILogger logger)
{
var ipfs = new IpfsClient(ipfsGateway);
var state = await context.FetchStateAsync <State>() ?? new State();
async Task processHash(Hash hash, CancellationToken cancellationToken)
{
if (state.ResolvedHashes.Contains(hash))
{
return;
}
state.ResolvedHashes.Add(hash);
var jToken = await ipfs.Dag.GetAsync(Cid.Read(hash.Bytes), cancellationToken);
var item = IpfsJsonSettings.ObjectFromJToken <object>(jToken);
if (item is IAgentStep agentStep)
{
await processHash(agentStep.Previous, cancellationToken);
}
var hashedType = typeof(Hashed <>).MakeGenericType(item.GetType());
var hashed = (IHashed <object>)Activator.CreateInstance(hashedType, item, hash);
await outputStream.AddAsync(hashed);
};
await hashStream.ForEachAsync(async hash =>
{
try
{
// NOTE: Currently blocks other items on the stream and does not process them
await processHash(hash, CancellationToken.None);
await context.UpdateStateAsync(state);
}
catch (Exception e)
{
logger.LogError(e.ToString());
}
}, CancellationToken.None);
}
public static async Task Run([PerperStreamTrigger] PerperStreamContext context,
[Perper("ipfsGateway")] string ipfsGateway,
[Perper("topic")] string topic,
[PerperStream("dataStream")] IAsyncEnumerable <ISigned <object> > dataStream,
ILogger logger)
{
var ipfs = new IpfsClient(ipfsGateway);
await dataStream.ForEachAsync(async item =>
{
try
{
var bytes = IpfsJsonSettings.ObjectToBytes(item);
await ipfs.PubSub.PublishAsync(topic, bytes, CancellationToken.None);
}
catch (Exception e)
{
logger.LogError(e.ToString());
}
}, CancellationToken.None);
}