user101191: As shown below, I generated 3 new addresses (Legacy I believe) in RegTest. I then try to create a multsig address from exactly these 3 addresses. What am I doing wrong, or is this unavailable in Regtest?
'''$ bitcoin-cli getnewaddress
2NFjbToRhpR2Lrx3VyP8rZ86XhZhofqWHBk
$ bitcoin-cli getnewaddress
2NAqXJMEFzEbhNyy9xRiHHcwWNCyFddFfXH
$ bitcoin-cli getnewaddress
2NEyDQfb85jRExQUnj4wC7fkFh5T1rt5zFk
$ bitcoin-cli createmultisig 2 "[\"2NFjbToRhpR2Lrx3VyP8rZ86XhZhofqWHBk\", \"2NAqXJMEFzEbhNyy9xRiHHcwWNCyFddFfXH\",\"2NEyDQfb85jRExQUnj4wC7fkFh5T1rt5zFk\"]"
error code: -5
error message:
Invalid public key: 2NFjbToRhpR2Lrx3VyP8rZ86XhZhofqWHBk
.'''

user208: The createmultisig RPC takes as input public keys, not addresses. As you created those addresses yourself, their public keys are in your wallet. createmultisig however is a utility RPC (which operates independently of the wallet), so it has no access to that information.
You can call the getaddressinfo wallet RPC on those addresses to obtain their public keys.

user48884: Addresses are not public keys. You cannot give createmultisig addresses because it cannot know what public keys your addresses refer to, if any. To get the public keys, you need to first do getaddressinfo <address>. That will give you a pubkey you can give to createmultisig.

101191: <p>As shown below, I generated 3 new addresses (Legacy I believe) in RegTest. I then try to create a multsig address from exactly these 3 addresses. What am I doing wrong, or is this unavailable in Regtest?</p>

<p>'''<strong>$ bitcoin-cli getnewaddress</strong>
2NFjbToRhpR2Lrx3VyP8rZ86XhZhofqWHBk</p>

<p><strong>$ bitcoin-cli getnewaddress</strong>
2NAqXJMEFzEbhNyy9xRiHHcwWNCyFddFfXH</p>

<p><strong>$ bitcoin-cli getnewaddress</strong>
2NEyDQfb85jRExQUnj4wC7fkFh5T1rt5zFk</p>

<p><strong>$ bitcoin-cli createmultisig 2 "[\"2NFjbToRhpR2Lrx3VyP8rZ86XhZhofqWHBk\", \"2NAqXJMEFzEbhNyy9xRiHHcwWNCyFddFfXH\",\"2NEyDQfb85jRExQUnj4wC7fkFh5T1rt5zFk\"]"</strong></p>

<p>error code: -5</p>

<p>error message:
Invalid public key: 2NFjbToRhpR2Lrx3VyP8rZ86XhZhofqWHBk
.'''</p>
 208: <p>The <code>createmultisig</code> RPC takes as input public keys, not addresses. As you created those addresses yourself, their public keys are in your wallet. <code>createmultisig</code> however is a utility RPC (which operates independently of the wallet), so it has no access to that information.</p>

<p>You can call the <code>getaddressinfo</code> wallet RPC on those addresses to obtain their public keys.</p>
 48884: <p>Addresses are not public keys. You cannot give <code>createmultisig</code> addresses because it cannot know what public keys your addresses refer to, if any. To get the public keys, you need to first do <code>getaddressinfo &lt;address&gt;</code>. That will give you a pubkey you can give to <code>createmultisig</code>.</p>
