Did not pass filter

Question

root@iZ8vba3a56x4hi6y1glllgZ:/home/mc/multichain-2.0-beta-1# ./multichain-util create c

MultiChain 2.0 beta 1 Utilities (latest protocol 20006)

root@iZ8vba3a56x4hi6y1glllgZ:/home/mc/multichain-2.0-beta-1# ./multichaind c -daemon

root@iZ8vba3a56x4hi6y1glllgZ:/home/mc/multichain-2.0-beta-1# ./multichain-cli c create txfilter filter1 '{}' 'function filtertransaction(){var tx=getfiltertransaction();if (tx.vout.length<=2);return "<<<<<222222";}'
{"method":"create","params":["txfilter","filter1",{},"function filtertransaction(){var tx=getfiltertransaction();if (tx.vout.length<=2);return \"<<<<<222222\";}"],"id":"34131784-1546260530","chain_name":"c"}

5e584aa864586a8724d628a4ec494b213e7b7ec877f0c60f03bb55d008958b72

root@iZ8vba3a56x4hi6y1glllgZ:/home/mc/multichain-2.0-beta-1# ./multichain-cli c listaddresses
{"method":"listaddresses","params":[],"id":"57864117-1546260544","chain_name":"c"}

[
    {
        "address" : "1WqPocUrRwNe6DS1MM9yTUpjSZm8Y2jbmxRP9M",
        "ismine" : true
    }
]

root@iZ8vba3a56x4hi6y1glllgZ:/home/mc/multichain-2.0-beta-1# ./multichain-cli c  approvefrom 1WqPocUrRwNe6DS1MM9yTUpjSZm8Y2jbmxRP9M filter1 true
{"method":"approvefrom","params":["1WqPocUrRwNe6DS1MM9yTUpjSZm8Y2jbmxRP9M","filter1",true],"id":"56866778-1546260581","chain_name":"c"}

error code: -26
error message:
Error: The transaction was rejected: 64: The transaction did not pass filter filter1: <<<<<222222

Answer 1

Yes, you cannot approve a filter if the approve transaction itself would not pass that filter. You can think of this as a very basic sanity check that your filter is not rejecting transactions based on unreasonable criteria. An approvefrom transaction does not have more than two outputs.

Comments

But my filter hasn't been used yet. Why was it intercepted when it was approved?

---

This is just the way the protocol is designed, by choice – a transaction approving a filter has to pass that filter. As I mentioned it's a good sanity check.