walletnotify - empty details section for watch-only addresses #17784

I'm on Bitcoin Core 0.19.0.1, linux I only tested in on testnet, not sure if it affects main as well.

When monitoring watch only addresses and a transaction appears, the walletnotify information is very limited. The [details] section is missing, receiving address isn't known, amount is 0. Example:

txninfo: Array
(
    [amount] => 0
    [confirmations] => 1
    [blockhash] => 00000000000017ba50a356cdaad6f5567e5915c990e3323e794ab04cf2329166
    [blockindex] => 2
    [blocktime] => 1576856608
    [txid] => 16c7fb601855ec13721cca37f3cc76cfc11343756028497b387ef07ed9e96ac3
    [walletconflicts] => Array
        (
        )

    [time] => 1576856604
    [timereceived] => 1576856604
    [bip125-replaceable] => no
    [details] => Array
        (
        )

    [hex] => 0200000001fbeec5d95e589f23d444c6b2866972f82799fa46090921d4009e6d9fd0c7a98e010000006a47304402206e8ba4494b25a6ee8bcf9679dc7561efe7449d9130d016a8c092db4db4708942022028ceb1d1879f11ea006af4079212a03397203ee55eb35acd089bf76f55d9fa1f0121037261975de0fbb69e462818b77c900447e7f3175b4de968a29d0eccc9530b83cdfdffffff02c0c62d00000000001600148effcc93dda4f7809aa56ce807ba4098d9ec6d9634043401000000001976a914c45be3fbe37460aa7a6ccd6d8e46916088f1d42988acf8e61800
)

This makes wallenotify useless for watch-only addresses.

Is there a workaround? My idea is to monitor and parse the output of "bitcoin-cli listtransactions "*" 100 0 true", since it provides all the details, even for watch-only addresses.

I call gettransaction and getaddressinfo in the script. here's an example script that sends and encrypted email on new transactions. Although if you use multi-wallet, you'll need #13339

#!/usr/bin/env bash
set -e

txid="$1"
wallet="$2"

from="Bitcoin Wallet <bitcoind@monad>"
to="William Casarin <jb55@jb55.com>"
subject="Wallet notification"
keys="-r 0x8860420C3C135662EABEADF96342E010C44A6337 -r 0x5B2B1E4F62216BC74362AC61D4FBA2FC4535A2A9 -r 0xE02D3FD4EB4585A63531C1D0E1BFCB90A1FF7A1C"

tx="$(bitcoin-cli -rpcwallet=$wallet gettransaction "$txid" true)"
address="$(jq -r '.details[0].address' <<<"$tx")"
details="$(jq -r '.details[] | [.address, .category, .amount, .label] | [@csv](/bitcoin-bitcoin/contributor/csv/)' <<<"$tx")"
keypath="$(bitcoin-cli -rpcwallet=$wallet getaddressinfo "$address" | jq -r .hdkeypath)"

amount="$(jq -r '.amount' <<<"$tx")"
confs="$(jq -r '.confirmations' <<<"$tx")"

time="$(date -d @$(jq -r '.time' <<<"$tx"))"
received="$(date -d @$(jq -r '.timereceived' <<<"$tx"))"

export GNUPGHOME=/zbig/bitcoin/gpg

msg="$(printf "txid: %s\n\naddress: %s\n\namount: %s\n\nconfirmations: %d\n\nwallet: %s\n\ntime: %s\n\nreceived: %s\n\nkeypath: %s\n\n%s\n\n\n%s" \
              "$txid" "$address" "$amount" "$confs" "$wallet" "$time" "$received" "$keypath" "$details" "$tx" )"

enctx="$(printf "Content-Type: text/plain\n\n%s\n" "$msg" | gpg --yes --always-trust --encrypt --armor $keys)"

{
cat <<EOF
From: $from
To: $to
Subject: $subject
MIME-Version: 1.0
Content-Type: multipart/encrypted; boundary="=-=-=";
  protocol="application/pgp-encrypted"

--=-=-=
Content-Type: application/pgp-encrypted

Version: 1

--=-=-=
Content-Type: application/octet-stream

$enctx
--=-=-=--
EOF
} | sendmail --file /zbig/bitcoin/gpg/.msmtprc -oi -t

printf "sent walletnotify email for %s\n" "$txid"

@indeed-a-genius is it possible that you are using a custom script with walletnotify that is extracting this information for you and the script is not working correctly? I am not using walletnotify but I think it only sends the txid to the script and the rest is implemented in the individual script. I briefly tested and walletnotify should be working with watchonly addresses. See my test here: https://github.com/fjahr/bitcoin/commit/21cbfebe181ae651b938f5b70dbe8dea56e0bf70

Thanks for the replies! I misunderstood what's being sent as %s in walletnotify. I assumed it's a complete json with transaction details, not just txid. I was indeed using a script, which I didn't fully analyze. So no bug here, sorry!