Gavin Andresen - 2011-10-19 13:54:26

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I pulled a Satoshi and decided to implement OP_EVAL to make sure it would actually work.
  https://github.com/gavinandresen/bitcoin-git/tree/op_eval

Not ready for pulling, expect rebasing/tweaking/changing. But it is fully working on the testnet.
(example transaction here)

The code puts "OP_EVAL" in the coinbase of generated blocks, so the rest of the network can see how many miners support it.

I gathered contact information for the top ten mining pools last week; when there is rough consensus on the details, I'll contact them to see if they have concerns and/or are willing to support OP_EVAL.

I started writing up BIPs for the various pieces of OP_EVAL, I'll post them soon.