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Archive Revision as of 17:37, 28 April 2013

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https://en.bitcoin.it/w/index.php?title=BIP_0017&oldid=37378
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Peter Todd 2013-10-21 00:44:39 -04:00
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@ -1,9 +1,11 @@
{{bip}}
<pre> <pre>
BIP: 17 BIP: 17
Title: OP_CHECKHASHVERIFY (CHV) Title: OP_CHECKHASHVERIFY (CHV)
Author: Luke Dashjr <luke+bip17@dashjr.org> Author: Luke Dashjr <luke+bip17@dashjr.org>
Status: Withdrawn Status: Draft
Type: Standards Track Type: Withdrawn
Created: 18-01-2012 Created: 18-01-2012
</pre> </pre>
@ -26,7 +28,7 @@ OP_CHECKHASHVERIFY will re-define the existing OP_NOP2 opcode, and will function
* If the hashes match, do nothing, proceed as if an OP_NOP; if they do not match, the script fails immediately. * If the hashes match, do nothing, proceed as if an OP_NOP; if they do not match, the script fails immediately.
* Note that in the case of a matched hash, the top stack item (the hash being compared with) is <u>not</u> popped off the stack. This is for backward compatibility. * Note that in the case of a matched hash, the top stack item (the hash being compared with) is <u>not</u> popped off the stack. This is for backward compatibility.
This opcode reassignment shall be applied when validating transactions in blocks only with timestamps after February 20, 2012 (see the Backwards Compatibility section for details). This opcode reassignment shall be applied when validating transactions in blocks only with timestamps after February 23, 2012 (see the Backwards Compatibility section for details).
A new standard transaction type that is relayed and included in mined blocks is defined: A new standard transaction type that is relayed and included in mined blocks is defined:
@ -82,7 +84,7 @@ To gracefully upgrade and ensure no long-lasting block-chain split occurs, more
To judge whether or not more than 50% of hashing power supports this BIP, miners are asked to upgrade their software and put the string "p2sh/CHV" in the input of the coinbase transaction for blocks that they create. To judge whether or not more than 50% of hashing power supports this BIP, miners are asked to upgrade their software and put the string "p2sh/CHV" in the input of the coinbase transaction for blocks that they create.
On February 3, 2012, the block-chain will be examined to determine the number of blocks supporting pay-to-script-hash for the previous 7 days. If at least 60% contain "p2sh/CHV" in their coinbase, then all blocks with timestamps after 18 Feb 2012, 00:00:00 GMT shall have their pay-to-script-hash transactions validated. On February 8, 2012, the block-chain will be examined to determine the number of blocks supporting pay-to-script-hash for the previous 7 days. If at least 60% contain "p2sh/CHV" in their coinbase, then all blocks with timestamps after 23 Feb 2012, 00:00:00 GMT shall have their pay-to-script-hash transactions validated.
If a majority of hashing power does not support the new validation rules, then rollout will be postponed (or rejected if it becomes clear that a majority will never be achieved). If a majority of hashing power does not support the new validation rules, then rollout will be postponed (or rejected if it becomes clear that a majority will never be achieved).
@ -100,3 +102,4 @@ OP_NOP2 is used, so existing OP_EVAL (BIP 12) transactions in the block chain ca
* [[BIP 0011|M-of-N Multisignature Transactions (BIP 11)]] * [[BIP 0011|M-of-N Multisignature Transactions (BIP 11)]]
* Example BIP 17 transaction chain: [http://blockexplorer.com/tx/b8fd633e7713a43d5ac87266adc78444669b987a56b3a65fb92d58c2c4b0e84d a] [http://blockexplorer.com/tx/eb3b82c0884e3efa6d8b0be55b4915eb20be124c9766245bcc7f34fdac32bccb b] [http://blockexplorer.com/tx/055707ce7fea7b9776fdc70413f65ceec413d46344424ab01acd5138767db137 c] [http://blockexplorer.com/tx/6d36bc17e947ce00bb6f12f8e7a56a1585c5a36188ffa2b05e10b4743273a74b d] * Example BIP 17 transaction chain: [http://blockexplorer.com/tx/b8fd633e7713a43d5ac87266adc78444669b987a56b3a65fb92d58c2c4b0e84d a] [http://blockexplorer.com/tx/eb3b82c0884e3efa6d8b0be55b4915eb20be124c9766245bcc7f34fdac32bccb b] [http://blockexplorer.com/tx/055707ce7fea7b9776fdc70413f65ceec413d46344424ab01acd5138767db137 c] [http://blockexplorer.com/tx/6d36bc17e947ce00bb6f12f8e7a56a1585c5a36188ffa2b05e10b4743273a74b d]
[[Category:BIP|D]]