Support Hub operated dmca/blocking

[jessopb]

It will be your hub's responsibility to block what they wish. Blocking is implemented in the hubs this way: https://github.com/lbryio/hub/blob/master/docs/blocking.md#defaults In short, Content offensive to the hub operator is reposted to a relevant list.

Currently, we pull down a list of outpoints (txid : nout) on startup and block content found there. After this, we will no longer do that, leaving the blocking/filtering to hubs.

Attempting to resolve a blocked item results in this message:

./lbrynet resolve lbry://THEBLOCKEDTHING#ABCDEF
{
  "lbry://THEBLOCKEDTHING": {
    "error": {
      "censor": {
        "address": "bHkpV3HZBTcBNNqQ6ZgH3jZChBLwEa4Zty",
        "amount": "0.1",
        "canonical_url": "lbry://@LBRY-DMCA#d",
        "claim_id": "dd687b357950f6f271999971f43c785e8067c3a9",
        "claim_op": "create",
        "confirmations": 485176,
        "has_signing_key": false,
        "height": 718715,
        "meta": {
          "activation_height": 718715,
          "claims_in_channel": 340,
          "creation_height": 718715,
          "creation_timestamp": 1582124266,
          "effective_amount": "0.1",
          "expiration_height": 2821115,
          "is_controlling": true,
          "reposted": 1,
          "support_amount": "0.0",
          "take_over_height": 718715
        },
        "name": "@LBRY-DMCA",
        "normalized_name": "@lbry-dmca",
        "nout": 0,
        "permanent_url": "lbry://@LBRY-DMCA#dd687b357950f6f271999971f43c785e8067c3a9",
        "short_url": "lbry://@LBRY-DMCA#d",
        "timestamp": 1582124266,
        "txid": "1b3278a9a37186c6390f9e28aae5ec80d71726b7134c0219c5bc6ec6382fc268",
        "type": "claim",
        "value": {
          "public_key": "3056301006072a8648ce3d020106052b8104000a0342000478ceb85de1da54bddafa809f045023d9c1347fd06ea1d9cbceadddb848e2c5d5855946a0eeed8a0739ea960c67048669dbc2c481ae8a67dd316e772fc778f42e",
          "public_key_id": "bShcpKQuV9PJTqeGEfkRXEhvnYBuEmWR9o"
        },
        "value_type": "channel"
      },
      "name": "BLOCKED",
      "text": "Resolve of 'lbry://THEBLOCKEDTHING' was censored by channel with claim id 'dd687b357950f6f271999971f43c785e8067c3a9'."
    }
  }
}

Currently, going to the page in the app goes to It should instead display an error such as below, but including the text of the error:

For now, you don't need to remove the lbryio list_blocked, list_filtered calls or legacy blocking system. Just make the new one work.

[jessopb]

Here is some background info https://github.com/lbryio/lbry-sdk/issues/2692

[kodxana]

Can we have way to allow HUB operator to add custom message for example of reason why content got filtered? Making everything DMCA is not always a good way and would be cool as HUB operator to let people knew :)

[tzarebczan]

That's what https://github.com/lbryio/lbry-sdk/pull/3620 does. And it's up to the channel to post it, not the hub operator. The operator may or may not be the one doing the blocking, but rather whitelisting blocking channels.