user17046: is it possible to make a multisig tx with the same keys ?
For example, i got:
Key A, Key B, Key C
Now A should be able to spend the coins and also B with the help of C. (B and C alone should not be able to spend the coins)
So 2 keys out of 4 should work but can key 1 and 2 be A (AABC) ?
Thanks,

user53: A transaction of the form:
2 pubkeyA pubkeyA pubkeyB pubkeyC 4 OP_CHECKMULTISIG

should do what you want. Give it a try on testnet, shouldn't be hard to whip up a test case using the raw transactions API of Bitcoin Core.

17046: <p>is it possible to make a multisig tx with the same keys ?
For example, i got:
Key A, Key B, Key C</p>

<p>Now A should be able to spend the coins and also B with the help of C. (B and C alone should not be able to spend the coins)
So 2 keys out of 4 should work but can key 1 and 2 be A (AABC) ?</p>

<p>Thanks,</p>
 53: <p>A transaction of the form:</p>

<pre><code>2 pubkeyA pubkeyA pubkeyB pubkeyC 4 OP_CHECKMULTISIG
</code></pre>

<p>should do what you want. Give it a try on testnet, shouldn't be hard to whip up a test case using the raw transactions API of Bitcoin Core.</p>
