How to import p2wsh-in-p2sh multisig as watch-only? I've created a p2wsh-in-p2sh multisig address using an offline node. I have the address and redeem script, as provided by bitcoin-cli addmultisigaddress on the offline node. How do I import this as a watch-only address on an online node, so I can use the online node to create transactions?

I have tried the following:

$ bitcoin-cli -testnet -rpcwallet=glacier importmulti '[{ "scriptPubKey": { "address": "2MzqiaZzpLT2SSBfsFqqo3FpZsP8g6WTvyC" }, "timestamp":"now", "redeemscript":"5221029f531503facdac2496f50a446d9bd29846a06a04a45e3845b656bb471df422fc2102e30787703a990e4015a2cb9071fcfd1c7d4641fb294e4b4c3f5f6b450a1925132102da28088a8022651171c4f13429b98709dabe13bc6da526537fdd2d0730dd2dbb2103286c96ecaa850a6ba43cc45fbb539c1fb1d65c23cc0f3cd09fcf9765826ff9de54ae", "watchonly":true, "label":"Glacier 2012-12-21" }]'
[
  {
    "success": true
  }
]


That seemed to work, but getaddressinfo doesn't look correct:

$ bitcoin-cli -testnet -rpcwallet=glacier getaddressinfo "2MzqiaZzpLT2SSBfsFqqo3FpZsP8g6WTvyC"
{
    "address": "2MzqiaZzpLT2SSBfsFqqo3FpZsP8g6WTvyC",
    "scriptPubKey": "a914534ee3ce21b8f805128f76b9d977e351bbbea20d87",
    "ismine": false,
    "iswatchonly": false,
    "isscript": true,
    "iswitness": false,
    "label": "Glacier 2012-12-21",
    "labels": [
       {
           "name": "Glacier 2012-12-21",
           "purpose": "receive"
       }
    ]
}


Shouldn't ismine and iswatchonly be true, and more details appear, such as hex and script?

Note that the glacier wallet was created with disable_private_keys=true. I'm running Bitcoin Core v0.17.0.1.
The issue here is that you've provided the p2wsh redeemscript as the script for the p2sh level of the nesting.  The redeemscript for the p2sh address is 

0020dabea3445c14e4a08d6705db4373bef467d4c64e7c8ddf149be50670de6878ae


This can be seen by running

bitcoin-cli -testnet decodescript 5221029f531503facdac2496f50a446d9bd29846a06a04a45e3845b656bb471df422fc2102e30787703a990e4015a2cb9071fcfd1c7d4641fb294e4b4c3f5f6b450a1925132102da28088a8022651171c4f13429b98709dabe13bc6da526537fdd2d0730dd2dbb2103286c96ecaa850a6ba43cc45fbb539c1fb1d65c23cc0f3cd09fcf9765826ff9de54ae


With it, you can import the p2sh-p2wsh by setting the redeemscript for each level of the nesting :

$ bitcoin-cli -testnet importmulti '[{ "scriptPubKey": { "address": "2MzqiaZzpLT2SSBfsFqqo3FpZsP8g6WTvyC" }, "timestamp":"now", "redeemscript":"0020DABEA3445C14E4A08D6705DB4373BEF467D4C64E7C8DDF149BE50670DE6878AE", "label":"Glacier 2012-12-21" }, {"scriptPubKey": { "address": "2MzqiaZzpLT2SSBfsFqqo3FpZsP8g6WTvyC" }, "redeemscript": "5221029f531503facdac2496f50a446d9bd29846a06a04a45e3845b656bb471df422fc2102e30787703a990e4015a2cb9071fcfd1c7d4641fb294e4b4c3f5f6b450a1925132102da28088a8022651171c4f13429b98709dabe13bc6da526537fdd2d0730dd2dbb2103286c96ecaa850a6ba43cc45fbb539c1fb1d65c23cc0f3cd09fcf9765826ff9de54ae", "label":"Glacier 2012-12-21", "timestamp":"now"}]'
[
  {
    "success": true
  },
  {
    "success": true
  }
]


Then you'll see the expected result from getaddressinfo :

bitcoin-cli -testnet getaddressinfo 2MzqiaZzpLT2SSBfsFqqo3FpZsP8g6WTvyC
{
  "address": "2MzqiaZzpLT2SSBfsFqqo3FpZsP8g6WTvyC",
  "scriptPubKey": "a914534ee3ce21b8f805128f76b9d977e351bbbea20d87",
  "ismine": false,
  "iswatchonly": true,
  "isscript": true,
  "iswitness": false,
  "script": "witness_v0_scripthash",
  "hex": "0020dabea3445c14e4a08d6705db4373bef467d4c64e7c8ddf149be50670de6878ae",
  "embedded": {
    "isscript": true,
    "iswitness": true,
    "witness_version": 0,
    "witness_program": "dabea3445c14e4a08d6705db4373bef467d4c64e7c8ddf149be50670de6878ae",
    "script": "multisig",
    "hex": "5221029f531503facdac2496f50a446d9bd29846a06a04a45e3845b656bb471df422fc2102e30787703a990e4015a2cb9071fcfd1c7d4641fb294e4b4c3f5f6b450a1925132102da28088a8022651171c4f13429b98709dabe13bc6da526537fdd2d0730dd2dbb2103286c96ecaa850a6ba43cc45fbb539c1fb1d65c23cc0f3cd09fcf9765826ff9de54ae",
    "sigsrequired": 2,
    "pubkeys": [
      "029f531503facdac2496f50a446d9bd29846a06a04a45e3845b656bb471df422fc",
      "02e30787703a990e4015a2cb9071fcfd1c7d4641fb294e4b4c3f5f6b450a192513",
      "02da28088a8022651171c4f13429b98709dabe13bc6da526537fdd2d0730dd2dbb",
      "03286c96ecaa850a6ba43cc45fbb539c1fb1d65c23cc0f3cd09fcf9765826ff9de"
    ],
    "address": "tb1qm2l2x3zuznj2prt8qhd5xua773naf3jw0jxa79ymu5r8phng0zhqrkkueu",
    "scriptPubKey": "0020dabea3445c14e4a08d6705db4373bef467d4c64e7c8ddf149be50670de6878ae"
  },
  "label": "Glacier 2012-12-21",
  "timestamp": 1296688602,
  "labels": [
    {
      "name": "Glacier 2012-12-21",
      "purpose": "receive"
    }
  ]
}


Note, ismine is never true for scripts\addresses for which you can't sign completely on your own.