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I have been checking the Bitcoin wiki for script and Bitcoin contracts and I have some doubts about advanced contracts.

For instance, I have seen in many places references to password controlled transfers, where only the owner of a keyword could get the BTC in the contract. Do you know of any example in the blockchain? I am curious about anything with script commands beyond the standard use.

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up vote 3 down vote accepted

Advanced contracts are hardly used currently, if at all - simply because the software to construct the necessary transactions has not been written yet. I doubt you will find examples on the blockchain.

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There might be some examples referenced here: bitcoin.stackexchange.com/a/2803/153 –  Stephen Gornick Nov 23 '12 at 2:32
    
The multiple signature example in the link is similar to what I was looking for. From the linked post, I guess that using script should be possible, but, in practice, it is seldom used as miners won't include them in their blocks. –  halftimepad Nov 23 '12 at 10:55

I'm closing this question. I have found a nice tool to look for non-standard scripts:

https://github.com/gavinandresen/bitcointools

With: dbdump.py --search-blocks=NONSTANDARD_CSCRIPTS I can check the kind of transactions I am curious about.

There are some interesting things there and I will spend some time looking into all, but, as a whole, there are few complex contracts (a few miners accept them). I will take Meni Rosenfeld's answer as the accepted answer.

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