Can't redeem simple non-standard transaction on testnet

[jackjack]

I made a transaction with this output: "2 OP_ADD 3 OP_NUMEQUALVERIFY" (0x5293539d)
But bitcoin-qt throws an error when I try to redeem it with "1" (0x51)
Am I missing something?

[Gavin Andresen]

Yes, after NUMEQUALVERIFY the stack will be empty, and for a script to be valid it must leave a true value on the stack.

Use NUMEQUAL and it should work.

[jackjack]

Thanks! I always thought it was other way round

[TalkingAntColony]

And thus begins solving math problems to redeem Bitcoins

[crary]

You use the XVERIFY instructions if you want to check more than one condition (eg, EQUAL and CHECKSIG) to avoid needing BOOLAND and annoying stack manipulation.  So XVERIFY all but the last condition.