Zcash Bitcore doesn't send notifications on bitcoind/addresstxid

[karelbilek]

Bitcore at https://explorer.testnet.z.cash doesn't send any notifications on bitcoind/addresstxid.

I am not sure if it's an issue with the code itself or with your deployment. (I am leaving the issue here, since it's the only insight/bitcore repo, that has issue tracking.)

A simple code, that works in bitcoin testnet and doesn't work with your server. (I wrote it for browser but it should probably work for node too.)

Bitcoin Testnet:

<script src="https://cdn.socket.io/socket.io-1.4.5.js"></script>
<script>
var endpoint = 'https://testnet.blockexplorer.com';
var connectionType = 'polling';
var address = 'mgswWyysmViMqYmn5XEj1pVz7rVUftVEBP';
var socket = io(endpoint, {transports: [connectionType]})

socket.on('bitcoind/addresstxid', function() {alert('Saw a transaction!');});
socket.emit('subscribe', 'bitcoind/addresstxid', [address]);
</script>

Use your own address, send a testnet transaction there and it works.

Zcash testnet:

<script src="https://cdn.socket.io/socket.io-1.4.5.js"></script>
<script>
var endpoint = 'https://explorer.testnet.z.cash';
var connectionType = 'polling';
var address = 'tmHyHq7Ec5oPXBDdyfDHAuqWphwEXxK5yZ9';
var socket = io(endpoint, {transports: [connectionType]})

socket.on('bitcoind/addresstxid', function() {alert('Saw a transaction!');});
socket.emit('subscribe', 'bitcoind/addresstxid', [address]);
</script>

Doesn't work.

Note that notifications in general work. This will alert at each block.

<script src="https://cdn.socket.io/socket.io-1.4.5.js"></script>
<script>
var endpoint = 'https://explorer.testnet.z.cash';
var connectionType = 'polling';
var socket = io(endpoint, {transports: [connectionType]})

socket.on('bitcoind/hashblock', function() {alert('Saw a block!');});
socket.emit('subscribe', 'bitcoind/hashblock');
</script>

[karelbilek]

(This is currently blocking mytrezor integration, since we use these notifications.)

[karelbilek]

as I wrote to slack - my bet is it's some combination of multibyte prefixes and zmq (that are used by notifications)

[str4d]

Looking at this now.

[karelbilek]

For what it's worth, I just tried the same thing with waterhole.io and their zcash bitcore (and livenet zcash), and it seems there is the same issue there.

So it is 90% with the code and not with the deployment.

[karelbilek]

It's fixed here - I tested it on my private server, it fixes the issue and notifications arrive

https://github.com/str4d/bitcore-lib-zcash/pull/1