Import multiple watch-only addresses using importaddress?

Question

With the importaddress RPC command it is possible to import one watch-only address. But how can I do that with, let's say, 100?

Answer 1

There is an alternate command importmulti to be used as follows:

bitcoin-cli importmulti '[
{
  "scriptPubKey" : { "address": "mxbvcPj7cnbxPP6oqpHJxxNb4xC8QoLquG" },
  "timestamp" : 0,
  "label" : "mxbvcPj7cnbxPP6oqpHJxxNb4xC8QoLquG"
},
{
  "scriptPubKey" : { "address": "n1iNb8XafoJTrCBBcGSSEZ6YNd6EWYo8PU" },
  "timestamp" : 0,
  "label" : "n1iNb8XafoJTrCBBcGSSEZ6YNd6EWYo8PU"
},
{
  "scriptPubKey" : { "address": "mgLs7quWwYBJa7jkZyebAec7RNXQtwaerK" },
  "timestamp" : 0,
  "label" : "mgLs7quWwYBJa7jkZyebAec7RNXQtwaerK"
}]' '{"rescan":false}'

Response is as follows:

[
  {
    "success": true
  }, 
  {
    "success": true
  }, 
  {
    "success": true
  }
]

Answer 2

The RPC interface doesn't generally provide any "batch mode" functionality. If you want to import 100 addresses, call importaddress 100 times. You might like to write a short script with a loop in some other language.

You should set the rescan parameter to false for all but the last address, so that you don't trigger rescanning 100 times.